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/* $Header$ */
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2 |
|
3 |
/*
|
4 |
* tkCanvPoly.c --
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5 |
*
|
6 |
* This file implements polygon items for canvas widgets.
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7 |
*
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* Copyright (c) 1991-1994 The Regents of the University of California.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tkcanvpoly.c,v 1.1.1.1 2001/06/13 04:57:07 dtashley Exp $
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*/
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16 |
|
17 |
#include <stdio.h>
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18 |
#include "tkInt.h"
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19 |
#include "tkPort.h"
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20 |
#include "tkCanvas.h"
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21 |
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22 |
/*
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* The structure below defines the record for each polygon item.
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*/
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25 |
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26 |
typedef struct PolygonItem {
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27 |
Tk_Item header; /* Generic stuff that's the same for all
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* types. MUST BE FIRST IN STRUCTURE. */
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29 |
Tk_Outline outline; /* Outline structure */
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30 |
int numPoints; /* Number of points in polygon.
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* Polygon is always closed. */
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32 |
int pointsAllocated; /* Number of points for which space is
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33 |
* allocated at *coordPtr. */
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34 |
double *coordPtr; /* Pointer to malloc-ed array containing
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35 |
* x- and y-coords of all points in polygon.
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* X-coords are even-valued indices, y-coords
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* are corresponding odd-valued indices. */
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38 |
int joinStyle; /* Join style for outline */
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39 |
Tk_TSOffset tsoffset;
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40 |
XColor *fillColor; /* Foreground color for polygon. */
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XColor *activeFillColor; /* Foreground color for polygon if state is active. */
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42 |
XColor *disabledFillColor; /* Foreground color for polygon if state is disabled. */
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43 |
Pixmap fillStipple; /* Stipple bitmap for filling polygon. */
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Pixmap activeFillStipple; /* Stipple bitmap for filling polygon if state is active. */
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Pixmap disabledFillStipple; /* Stipple bitmap for filling polygon if state is disabled. */
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GC fillGC; /* Graphics context for filling polygon. */
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Tk_SmoothMethod *smooth; /* Non-zero means draw shape smoothed (i.e.
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48 |
* with Bezier splines). */
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49 |
int splineSteps; /* Number of steps in each spline segment. */
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50 |
int autoClosed; /* Zero means the given polygon was closed,
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one means that we auto closed it. */
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} PolygonItem;
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53 |
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54 |
/*
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55 |
* Information used for parsing configuration specs:
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56 |
*/
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57 |
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58 |
static Tk_CustomOption smoothOption = {
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59 |
(Tk_OptionParseProc *) TkSmoothParseProc,
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60 |
TkSmoothPrintProc, (ClientData) NULL
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61 |
};
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62 |
static Tk_CustomOption stateOption = {
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63 |
(Tk_OptionParseProc *) TkStateParseProc,
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64 |
TkStatePrintProc, (ClientData) 2
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65 |
};
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66 |
static Tk_CustomOption tagsOption = {
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(Tk_OptionParseProc *) Tk_CanvasTagsParseProc,
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68 |
Tk_CanvasTagsPrintProc, (ClientData) NULL
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69 |
};
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70 |
static Tk_CustomOption dashOption = {
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(Tk_OptionParseProc *) TkCanvasDashParseProc,
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TkCanvasDashPrintProc, (ClientData) NULL
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73 |
};
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74 |
static Tk_CustomOption offsetOption = {
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75 |
(Tk_OptionParseProc *) TkOffsetParseProc,
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76 |
TkOffsetPrintProc,
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77 |
(ClientData) (TK_OFFSET_RELATIVE|TK_OFFSET_INDEX)
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78 |
};
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79 |
static Tk_CustomOption pixelOption = {
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80 |
(Tk_OptionParseProc *) TkPixelParseProc,
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81 |
TkPixelPrintProc, (ClientData) NULL
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82 |
};
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83 |
|
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static Tk_ConfigSpec configSpecs[] = {
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85 |
{TK_CONFIG_CUSTOM, "-activedash", (char *) NULL, (char *) NULL,
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86 |
(char *) NULL, Tk_Offset(PolygonItem, outline.activeDash),
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87 |
TK_CONFIG_NULL_OK, &dashOption},
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88 |
{TK_CONFIG_COLOR, "-activefill", (char *) NULL, (char *) NULL,
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89 |
(char *) NULL, Tk_Offset(PolygonItem, activeFillColor),
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90 |
TK_CONFIG_NULL_OK},
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91 |
{TK_CONFIG_COLOR, "-activeoutline", (char *) NULL, (char *) NULL,
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92 |
(char *) NULL, Tk_Offset(PolygonItem, outline.activeColor),
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TK_CONFIG_NULL_OK},
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94 |
{TK_CONFIG_BITMAP, "-activeoutlinestipple", (char *) NULL, (char *) NULL,
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95 |
(char *) NULL, Tk_Offset(PolygonItem, outline.activeStipple),
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96 |
TK_CONFIG_NULL_OK},
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{TK_CONFIG_BITMAP, "-activestipple", (char *) NULL, (char *) NULL,
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98 |
(char *) NULL, Tk_Offset(PolygonItem, activeFillStipple),
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99 |
TK_CONFIG_NULL_OK},
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{TK_CONFIG_CUSTOM, "-activewidth", (char *) NULL, (char *) NULL,
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101 |
"0.0", Tk_Offset(PolygonItem, outline.activeWidth),
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TK_CONFIG_DONT_SET_DEFAULT, &pixelOption},
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{TK_CONFIG_CUSTOM, "-dash", (char *) NULL, (char *) NULL,
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104 |
(char *) NULL, Tk_Offset(PolygonItem, outline.dash),
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TK_CONFIG_NULL_OK, &dashOption},
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106 |
{TK_CONFIG_PIXELS, "-dashoffset", (char *) NULL, (char *) NULL,
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107 |
"0", Tk_Offset(PolygonItem, outline.offset),
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108 |
TK_CONFIG_DONT_SET_DEFAULT},
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109 |
{TK_CONFIG_CUSTOM, "-disableddash", (char *) NULL, (char *) NULL,
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110 |
(char *) NULL, Tk_Offset(PolygonItem, outline.disabledDash),
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111 |
TK_CONFIG_NULL_OK, &dashOption},
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112 |
{TK_CONFIG_COLOR, "-disabledfill", (char *) NULL, (char *) NULL,
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113 |
(char *) NULL, Tk_Offset(PolygonItem, disabledFillColor),
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114 |
TK_CONFIG_NULL_OK},
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115 |
{TK_CONFIG_COLOR, "-disabledoutline", (char *) NULL, (char *) NULL,
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116 |
(char *) NULL, Tk_Offset(PolygonItem, outline.disabledColor),
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117 |
TK_CONFIG_NULL_OK},
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118 |
{TK_CONFIG_BITMAP, "-disabledoutlinestipple", (char *) NULL, (char *) NULL,
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119 |
(char *) NULL, Tk_Offset(PolygonItem, outline.disabledStipple),
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120 |
TK_CONFIG_NULL_OK},
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121 |
{TK_CONFIG_BITMAP, "-disabledstipple", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(PolygonItem, disabledFillStipple),
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TK_CONFIG_NULL_OK},
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124 |
{TK_CONFIG_CUSTOM, "-disabledwidth", (char *) NULL, (char *) NULL,
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125 |
"0.0", Tk_Offset(PolygonItem, outline.disabledWidth),
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TK_CONFIG_DONT_SET_DEFAULT, &pixelOption},
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127 |
{TK_CONFIG_COLOR, "-fill", (char *) NULL, (char *) NULL,
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128 |
"black", Tk_Offset(PolygonItem, fillColor), TK_CONFIG_NULL_OK},
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129 |
{TK_CONFIG_JOIN_STYLE, "-joinstyle", (char *) NULL, (char *) NULL,
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130 |
"round", Tk_Offset(PolygonItem, joinStyle), TK_CONFIG_DONT_SET_DEFAULT},
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{TK_CONFIG_CUSTOM, "-offset", (char *) NULL, (char *) NULL,
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"0,0", Tk_Offset(PolygonItem, tsoffset),
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TK_CONFIG_NULL_OK, &offsetOption},
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{TK_CONFIG_COLOR, "-outline", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(PolygonItem, outline.color),
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TK_CONFIG_NULL_OK},
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{TK_CONFIG_CUSTOM, "-outlineoffset", (char *) NULL, (char *) NULL,
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"0,0", Tk_Offset(PolygonItem, outline.tsoffset),
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TK_CONFIG_NULL_OK, &offsetOption},
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{TK_CONFIG_BITMAP, "-outlinestipple", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(PolygonItem, outline.stipple),
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TK_CONFIG_NULL_OK},
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{TK_CONFIG_CUSTOM, "-smooth", (char *) NULL, (char *) NULL,
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"0", Tk_Offset(PolygonItem, smooth),
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TK_CONFIG_DONT_SET_DEFAULT, &smoothOption},
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{TK_CONFIG_INT, "-splinesteps", (char *) NULL, (char *) NULL,
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147 |
"12", Tk_Offset(PolygonItem, splineSteps), TK_CONFIG_DONT_SET_DEFAULT},
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148 |
{TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL,
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149 |
(char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK,
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&stateOption},
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{TK_CONFIG_BITMAP, "-stipple", (char *) NULL, (char *) NULL,
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152 |
(char *) NULL, Tk_Offset(PolygonItem, fillStipple), TK_CONFIG_NULL_OK},
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{TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL,
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(char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},
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{TK_CONFIG_CUSTOM, "-width", (char *) NULL, (char *) NULL,
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"1.0", Tk_Offset(PolygonItem, outline.width),
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TK_CONFIG_DONT_SET_DEFAULT, &pixelOption},
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{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
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(char *) NULL, 0, 0}
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};
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/*
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163 |
* Prototypes for procedures defined in this file:
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164 |
*/
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165 |
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166 |
static void ComputePolygonBbox _ANSI_ARGS_((Tk_Canvas canvas,
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167 |
PolygonItem *polyPtr));
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168 |
static int ConfigurePolygon _ANSI_ARGS_((Tcl_Interp *interp,
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169 |
Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
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170 |
Tcl_Obj *CONST argv[], int flags));
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171 |
static int CreatePolygon _ANSI_ARGS_((Tcl_Interp *interp,
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172 |
Tk_Canvas canvas, struct Tk_Item *itemPtr,
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173 |
int argc, Tcl_Obj *CONST argv[]));
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174 |
static void DeletePolygon _ANSI_ARGS_((Tk_Canvas canvas,
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175 |
Tk_Item *itemPtr, Display *display));
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176 |
static void DisplayPolygon _ANSI_ARGS_((Tk_Canvas canvas,
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177 |
Tk_Item *itemPtr, Display *display, Drawable dst,
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int x, int y, int width, int height));
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179 |
static int GetPolygonIndex _ANSI_ARGS_((Tcl_Interp *interp,
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180 |
Tk_Canvas canvas, Tk_Item *itemPtr,
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181 |
Tcl_Obj *obj, int *indexPtr));
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182 |
static int PolygonCoords _ANSI_ARGS_((Tcl_Interp *interp,
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183 |
Tk_Canvas canvas, Tk_Item *itemPtr,
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184 |
int argc, Tcl_Obj *CONST argv[]));
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185 |
static void PolygonDeleteCoords _ANSI_ARGS_((Tk_Canvas canvas,
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186 |
Tk_Item *itemPtr, int first, int last));
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187 |
static void PolygonInsert _ANSI_ARGS_((Tk_Canvas canvas,
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188 |
Tk_Item *itemPtr, int beforeThis, Tcl_Obj *obj));
|
189 |
static int PolygonToArea _ANSI_ARGS_((Tk_Canvas canvas,
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190 |
Tk_Item *itemPtr, double *rectPtr));
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191 |
static double PolygonToPoint _ANSI_ARGS_((Tk_Canvas canvas,
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192 |
Tk_Item *itemPtr, double *pointPtr));
|
193 |
static int PolygonToPostscript _ANSI_ARGS_((Tcl_Interp *interp,
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194 |
Tk_Canvas canvas, Tk_Item *itemPtr, int prepass));
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195 |
static void ScalePolygon _ANSI_ARGS_((Tk_Canvas canvas,
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196 |
Tk_Item *itemPtr, double originX, double originY,
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197 |
double scaleX, double scaleY));
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198 |
static void TranslatePolygon _ANSI_ARGS_((Tk_Canvas canvas,
|
199 |
Tk_Item *itemPtr, double deltaX, double deltaY));
|
200 |
|
201 |
/*
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202 |
* The structures below defines the polygon item type by means
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203 |
* of procedures that can be invoked by generic item code.
|
204 |
*/
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205 |
|
206 |
Tk_ItemType tkPolygonType = {
|
207 |
"polygon", /* name */
|
208 |
sizeof(PolygonItem), /* itemSize */
|
209 |
CreatePolygon, /* createProc */
|
210 |
configSpecs, /* configSpecs */
|
211 |
ConfigurePolygon, /* configureProc */
|
212 |
PolygonCoords, /* coordProc */
|
213 |
DeletePolygon, /* deleteProc */
|
214 |
DisplayPolygon, /* displayProc */
|
215 |
TK_CONFIG_OBJS, /* flags */
|
216 |
PolygonToPoint, /* pointProc */
|
217 |
PolygonToArea, /* areaProc */
|
218 |
PolygonToPostscript, /* postscriptProc */
|
219 |
ScalePolygon, /* scaleProc */
|
220 |
TranslatePolygon, /* translateProc */
|
221 |
(Tk_ItemIndexProc *) GetPolygonIndex,/* indexProc */
|
222 |
(Tk_ItemCursorProc *) NULL, /* icursorProc */
|
223 |
(Tk_ItemSelectionProc *) NULL, /* selectionProc */
|
224 |
(Tk_ItemInsertProc *) PolygonInsert,/* insertProc */
|
225 |
PolygonDeleteCoords, /* dTextProc */
|
226 |
(Tk_ItemType *) NULL, /* nextPtr */
|
227 |
};
|
228 |
|
229 |
/*
|
230 |
* The definition below determines how large are static arrays
|
231 |
* used to hold spline points (splines larger than this have to
|
232 |
* have their arrays malloc-ed).
|
233 |
*/
|
234 |
|
235 |
#define MAX_STATIC_POINTS 200
|
236 |
|
237 |
/*
|
238 |
*--------------------------------------------------------------
|
239 |
*
|
240 |
* CreatePolygon --
|
241 |
*
|
242 |
* This procedure is invoked to create a new polygon item in
|
243 |
* a canvas.
|
244 |
*
|
245 |
* Results:
|
246 |
* A standard Tcl return value. If an error occurred in
|
247 |
* creating the item, then an error message is left in
|
248 |
* the interp's result; in this case itemPtr is
|
249 |
* left uninitialized, so it can be safely freed by the
|
250 |
* caller.
|
251 |
*
|
252 |
* Side effects:
|
253 |
* A new polygon item is created.
|
254 |
*
|
255 |
*--------------------------------------------------------------
|
256 |
*/
|
257 |
|
258 |
static int
|
259 |
CreatePolygon(interp, canvas, itemPtr, argc, argv)
|
260 |
Tcl_Interp *interp; /* Interpreter for error reporting. */
|
261 |
Tk_Canvas canvas; /* Canvas to hold new item. */
|
262 |
Tk_Item *itemPtr; /* Record to hold new item; header
|
263 |
* has been initialized by caller. */
|
264 |
int argc; /* Number of arguments in argv. */
|
265 |
Tcl_Obj *CONST argv[]; /* Arguments describing polygon. */
|
266 |
{
|
267 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
268 |
int i;
|
269 |
|
270 |
/*
|
271 |
* Carry out initialization that is needed in order to clean
|
272 |
* up after errors during the the remainder of this procedure.
|
273 |
*/
|
274 |
|
275 |
Tk_CreateOutline(&(polyPtr->outline));
|
276 |
polyPtr->numPoints = 0;
|
277 |
polyPtr->pointsAllocated = 0;
|
278 |
polyPtr->coordPtr = NULL;
|
279 |
polyPtr->joinStyle = JoinRound;
|
280 |
polyPtr->tsoffset.flags = 0;
|
281 |
polyPtr->tsoffset.xoffset = 0;
|
282 |
polyPtr->tsoffset.yoffset = 0;
|
283 |
polyPtr->fillColor = NULL;
|
284 |
polyPtr->activeFillColor = NULL;
|
285 |
polyPtr->disabledFillColor = NULL;
|
286 |
polyPtr->fillStipple = None;
|
287 |
polyPtr->activeFillStipple = None;
|
288 |
polyPtr->disabledFillStipple = None;
|
289 |
polyPtr->fillGC = None;
|
290 |
polyPtr->smooth = (Tk_SmoothMethod *) NULL;
|
291 |
polyPtr->splineSteps = 12;
|
292 |
polyPtr->autoClosed = 0;
|
293 |
|
294 |
/*
|
295 |
* Count the number of points and then parse them into a point
|
296 |
* array. Leading arguments are assumed to be points if they
|
297 |
* start with a digit or a minus sign followed by a digit.
|
298 |
*/
|
299 |
|
300 |
for (i = 0; i < argc; i++) {
|
301 |
char *arg = Tcl_GetStringFromObj((Tcl_Obj *) argv[i], NULL);
|
302 |
if ((arg[0] == '-') && (arg[1] >= 'a')
|
303 |
&& (arg[1] <= 'z')) {
|
304 |
break;
|
305 |
}
|
306 |
}
|
307 |
if (i && PolygonCoords(interp, canvas, itemPtr, i, argv) != TCL_OK) {
|
308 |
goto error;
|
309 |
}
|
310 |
|
311 |
if (ConfigurePolygon(interp, canvas, itemPtr, argc-i, argv+i, 0)
|
312 |
== TCL_OK) {
|
313 |
return TCL_OK;
|
314 |
}
|
315 |
|
316 |
error:
|
317 |
DeletePolygon(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas)));
|
318 |
return TCL_ERROR;
|
319 |
}
|
320 |
|
321 |
/*
|
322 |
*--------------------------------------------------------------
|
323 |
*
|
324 |
* PolygonCoords --
|
325 |
*
|
326 |
* This procedure is invoked to process the "coords" widget
|
327 |
* command on polygons. See the user documentation for details
|
328 |
* on what it does.
|
329 |
*
|
330 |
* Results:
|
331 |
* Returns TCL_OK or TCL_ERROR, and sets the interp's result.
|
332 |
*
|
333 |
* Side effects:
|
334 |
* The coordinates for the given item may be changed.
|
335 |
*
|
336 |
*--------------------------------------------------------------
|
337 |
*/
|
338 |
|
339 |
static int
|
340 |
PolygonCoords(interp, canvas, itemPtr, argc, argv)
|
341 |
Tcl_Interp *interp; /* Used for error reporting. */
|
342 |
Tk_Canvas canvas; /* Canvas containing item. */
|
343 |
Tk_Item *itemPtr; /* Item whose coordinates are to be
|
344 |
* read or modified. */
|
345 |
int argc; /* Number of coordinates supplied in
|
346 |
* argv. */
|
347 |
Tcl_Obj *CONST argv[]; /* Array of coordinates: x1, y1,
|
348 |
* x2, y2, ... */
|
349 |
{
|
350 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
351 |
int i, numPoints;
|
352 |
|
353 |
if (argc == 0) {
|
354 |
/*
|
355 |
* Print the coords used to create the polygon. If we auto
|
356 |
* closed the polygon then we don't report the last point.
|
357 |
*/
|
358 |
Tcl_Obj *subobj, *obj = Tcl_NewObj();
|
359 |
for (i = 0; i < 2*(polyPtr->numPoints - polyPtr->autoClosed); i++) {
|
360 |
subobj = Tcl_NewDoubleObj(polyPtr->coordPtr[i]);
|
361 |
Tcl_ListObjAppendElement(interp, obj, subobj);
|
362 |
}
|
363 |
Tcl_SetObjResult(interp, obj);
|
364 |
return TCL_OK;
|
365 |
}
|
366 |
if (argc == 1) {
|
367 |
if (Tcl_ListObjGetElements(interp, argv[0], &argc,
|
368 |
(Tcl_Obj ***) &argv) != TCL_OK) {
|
369 |
return TCL_ERROR;
|
370 |
}
|
371 |
}
|
372 |
if (argc & 1) {
|
373 |
Tcl_AppendResult(interp,
|
374 |
"odd number of coordinates specified for polygon",
|
375 |
(char *) NULL);
|
376 |
return TCL_ERROR;
|
377 |
} else {
|
378 |
numPoints = argc/2;
|
379 |
if (polyPtr->pointsAllocated <= numPoints) {
|
380 |
if (polyPtr->coordPtr != NULL) {
|
381 |
ckfree((char *) polyPtr->coordPtr);
|
382 |
}
|
383 |
|
384 |
/*
|
385 |
* One extra point gets allocated here, because we always
|
386 |
* add another point to close the polygon.
|
387 |
*/
|
388 |
|
389 |
polyPtr->coordPtr = (double *) ckalloc((unsigned)
|
390 |
(sizeof(double) * (argc+2)));
|
391 |
polyPtr->pointsAllocated = numPoints+1;
|
392 |
}
|
393 |
for (i = argc-1; i >= 0; i--) {
|
394 |
if (Tk_CanvasGetCoordFromObj(interp, canvas, argv[i],
|
395 |
&polyPtr->coordPtr[i]) != TCL_OK) {
|
396 |
return TCL_ERROR;
|
397 |
}
|
398 |
}
|
399 |
polyPtr->numPoints = numPoints;
|
400 |
polyPtr->autoClosed = 0;
|
401 |
|
402 |
/*
|
403 |
* Close the polygon if it isn't already closed.
|
404 |
*/
|
405 |
|
406 |
if (argc>2 && ((polyPtr->coordPtr[argc-2] != polyPtr->coordPtr[0])
|
407 |
|| (polyPtr->coordPtr[argc-1] != polyPtr->coordPtr[1]))) {
|
408 |
polyPtr->autoClosed = 1;
|
409 |
polyPtr->numPoints++;
|
410 |
polyPtr->coordPtr[argc] = polyPtr->coordPtr[0];
|
411 |
polyPtr->coordPtr[argc+1] = polyPtr->coordPtr[1];
|
412 |
}
|
413 |
ComputePolygonBbox(canvas, polyPtr);
|
414 |
}
|
415 |
return TCL_OK;
|
416 |
}
|
417 |
|
418 |
/*
|
419 |
*--------------------------------------------------------------
|
420 |
*
|
421 |
* ConfigurePolygon --
|
422 |
*
|
423 |
* This procedure is invoked to configure various aspects
|
424 |
* of a polygon item such as its background color.
|
425 |
*
|
426 |
* Results:
|
427 |
* A standard Tcl result code. If an error occurs, then
|
428 |
* an error message is left in the interp's result.
|
429 |
*
|
430 |
* Side effects:
|
431 |
* Configuration information, such as colors and stipple
|
432 |
* patterns, may be set for itemPtr.
|
433 |
*
|
434 |
*--------------------------------------------------------------
|
435 |
*/
|
436 |
|
437 |
static int
|
438 |
ConfigurePolygon(interp, canvas, itemPtr, argc, argv, flags)
|
439 |
Tcl_Interp *interp; /* Interpreter for error reporting. */
|
440 |
Tk_Canvas canvas; /* Canvas containing itemPtr. */
|
441 |
Tk_Item *itemPtr; /* Polygon item to reconfigure. */
|
442 |
int argc; /* Number of elements in argv. */
|
443 |
Tcl_Obj *CONST argv[]; /* Arguments describing things to configure. */
|
444 |
int flags; /* Flags to pass to Tk_ConfigureWidget. */
|
445 |
{
|
446 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
447 |
XGCValues gcValues;
|
448 |
GC newGC;
|
449 |
unsigned long mask;
|
450 |
Tk_Window tkwin;
|
451 |
XColor *color;
|
452 |
Pixmap stipple;
|
453 |
Tk_State state;
|
454 |
|
455 |
tkwin = Tk_CanvasTkwin(canvas);
|
456 |
if (Tk_ConfigureWidget(interp, tkwin, configSpecs, argc, (char **) argv,
|
457 |
(char *) polyPtr, flags|TK_CONFIG_OBJS) != TCL_OK) {
|
458 |
return TCL_ERROR;
|
459 |
}
|
460 |
|
461 |
/*
|
462 |
* A few of the options require additional processing, such as
|
463 |
* graphics contexts.
|
464 |
*/
|
465 |
|
466 |
state = itemPtr->state;
|
467 |
|
468 |
if (polyPtr->outline.activeWidth > polyPtr->outline.width ||
|
469 |
polyPtr->outline.activeDash.number != 0 ||
|
470 |
polyPtr->outline.activeColor != NULL ||
|
471 |
polyPtr->outline.activeStipple != None ||
|
472 |
polyPtr->activeFillColor != NULL ||
|
473 |
polyPtr->activeFillStipple != None) {
|
474 |
itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT;
|
475 |
} else {
|
476 |
itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT;
|
477 |
}
|
478 |
|
479 |
if(state == TK_STATE_NULL) {
|
480 |
state = ((TkCanvas *)canvas)->canvas_state;
|
481 |
}
|
482 |
if (state==TK_STATE_HIDDEN) {
|
483 |
ComputePolygonBbox(canvas, polyPtr);
|
484 |
return TCL_OK;
|
485 |
}
|
486 |
|
487 |
mask = Tk_ConfigOutlineGC(&gcValues, canvas, itemPtr, &(polyPtr->outline));
|
488 |
if (mask) {
|
489 |
gcValues.cap_style = CapRound;
|
490 |
gcValues.join_style = polyPtr->joinStyle;
|
491 |
mask |= GCCapStyle|GCJoinStyle;
|
492 |
newGC = Tk_GetGC(tkwin, mask, &gcValues);
|
493 |
} else {
|
494 |
newGC = None;
|
495 |
}
|
496 |
if (polyPtr->outline.gc != None) {
|
497 |
Tk_FreeGC(Tk_Display(tkwin), polyPtr->outline.gc);
|
498 |
}
|
499 |
polyPtr->outline.gc = newGC;
|
500 |
|
501 |
color = polyPtr->fillColor;
|
502 |
stipple = polyPtr->fillStipple;
|
503 |
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
|
504 |
if (polyPtr->activeFillColor!=NULL) {
|
505 |
color = polyPtr->activeFillColor;
|
506 |
}
|
507 |
if (polyPtr->activeFillStipple!=None) {
|
508 |
stipple = polyPtr->activeFillStipple;
|
509 |
}
|
510 |
} else if (state==TK_STATE_DISABLED) {
|
511 |
if (polyPtr->disabledFillColor!=NULL) {
|
512 |
color = polyPtr->disabledFillColor;
|
513 |
}
|
514 |
if (polyPtr->disabledFillStipple!=None) {
|
515 |
stipple = polyPtr->disabledFillStipple;
|
516 |
}
|
517 |
}
|
518 |
|
519 |
if (color == NULL) {
|
520 |
newGC = None;
|
521 |
} else {
|
522 |
gcValues.foreground = color->pixel;
|
523 |
mask = GCForeground;
|
524 |
if (stipple != None) {
|
525 |
gcValues.stipple = stipple;
|
526 |
gcValues.fill_style = FillStippled;
|
527 |
mask |= GCStipple|GCFillStyle;
|
528 |
}
|
529 |
newGC = Tk_GetGC(tkwin, mask, &gcValues);
|
530 |
}
|
531 |
if (polyPtr->fillGC != None) {
|
532 |
Tk_FreeGC(Tk_Display(tkwin), polyPtr->fillGC);
|
533 |
}
|
534 |
polyPtr->fillGC = newGC;
|
535 |
|
536 |
/*
|
537 |
* Keep spline parameters within reasonable limits.
|
538 |
*/
|
539 |
|
540 |
if (polyPtr->splineSteps < 1) {
|
541 |
polyPtr->splineSteps = 1;
|
542 |
} else if (polyPtr->splineSteps > 100) {
|
543 |
polyPtr->splineSteps = 100;
|
544 |
}
|
545 |
|
546 |
ComputePolygonBbox(canvas, polyPtr);
|
547 |
return TCL_OK;
|
548 |
}
|
549 |
|
550 |
/*
|
551 |
*--------------------------------------------------------------
|
552 |
*
|
553 |
* DeletePolygon --
|
554 |
*
|
555 |
* This procedure is called to clean up the data structure
|
556 |
* associated with a polygon item.
|
557 |
*
|
558 |
* Results:
|
559 |
* None.
|
560 |
*
|
561 |
* Side effects:
|
562 |
* Resources associated with itemPtr are released.
|
563 |
*
|
564 |
*--------------------------------------------------------------
|
565 |
*/
|
566 |
|
567 |
static void
|
568 |
DeletePolygon(canvas, itemPtr, display)
|
569 |
Tk_Canvas canvas; /* Info about overall canvas widget. */
|
570 |
Tk_Item *itemPtr; /* Item that is being deleted. */
|
571 |
Display *display; /* Display containing window for
|
572 |
* canvas. */
|
573 |
{
|
574 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
575 |
|
576 |
Tk_DeleteOutline(display,&(polyPtr->outline));
|
577 |
if (polyPtr->coordPtr != NULL) {
|
578 |
ckfree((char *) polyPtr->coordPtr);
|
579 |
}
|
580 |
if (polyPtr->fillColor != NULL) {
|
581 |
Tk_FreeColor(polyPtr->fillColor);
|
582 |
}
|
583 |
if (polyPtr->activeFillColor != NULL) {
|
584 |
Tk_FreeColor(polyPtr->activeFillColor);
|
585 |
}
|
586 |
if (polyPtr->disabledFillColor != NULL) {
|
587 |
Tk_FreeColor(polyPtr->disabledFillColor);
|
588 |
}
|
589 |
if (polyPtr->fillStipple != None) {
|
590 |
Tk_FreeBitmap(display, polyPtr->fillStipple);
|
591 |
}
|
592 |
if (polyPtr->activeFillStipple != None) {
|
593 |
Tk_FreeBitmap(display, polyPtr->activeFillStipple);
|
594 |
}
|
595 |
if (polyPtr->disabledFillStipple != None) {
|
596 |
Tk_FreeBitmap(display, polyPtr->disabledFillStipple);
|
597 |
}
|
598 |
if (polyPtr->fillGC != None) {
|
599 |
Tk_FreeGC(display, polyPtr->fillGC);
|
600 |
}
|
601 |
}
|
602 |
|
603 |
/*
|
604 |
*--------------------------------------------------------------
|
605 |
*
|
606 |
* ComputePolygonBbox --
|
607 |
*
|
608 |
* This procedure is invoked to compute the bounding box of
|
609 |
* all the pixels that may be drawn as part of a polygon.
|
610 |
*
|
611 |
* Results:
|
612 |
* None.
|
613 |
*
|
614 |
* Side effects:
|
615 |
* The fields x1, y1, x2, and y2 are updated in the header
|
616 |
* for itemPtr.
|
617 |
*
|
618 |
*--------------------------------------------------------------
|
619 |
*/
|
620 |
|
621 |
static void
|
622 |
ComputePolygonBbox(canvas, polyPtr)
|
623 |
Tk_Canvas canvas; /* Canvas that contains item. */
|
624 |
PolygonItem *polyPtr; /* Item whose bbox is to be
|
625 |
* recomputed. */
|
626 |
{
|
627 |
double *coordPtr;
|
628 |
int i;
|
629 |
double width;
|
630 |
Tk_State state = polyPtr->header.state;
|
631 |
Tk_TSOffset *tsoffset;
|
632 |
|
633 |
if(state == TK_STATE_NULL) {
|
634 |
state = ((TkCanvas *)canvas)->canvas_state;
|
635 |
}
|
636 |
width = polyPtr->outline.width;
|
637 |
if (polyPtr->coordPtr == NULL || (polyPtr->numPoints < 1) || (state==TK_STATE_HIDDEN)) {
|
638 |
polyPtr->header.x1 = polyPtr->header.x2 =
|
639 |
polyPtr->header.y1 = polyPtr->header.y2 = -1;
|
640 |
return;
|
641 |
}
|
642 |
if (((TkCanvas *)canvas)->currentItemPtr == (Tk_Item *)polyPtr) {
|
643 |
if (polyPtr->outline.activeWidth>width) {
|
644 |
width = polyPtr->outline.activeWidth;
|
645 |
}
|
646 |
} else if (state==TK_STATE_DISABLED) {
|
647 |
if (polyPtr->outline.disabledWidth>0.0) {
|
648 |
width = polyPtr->outline.disabledWidth;
|
649 |
}
|
650 |
}
|
651 |
|
652 |
coordPtr = polyPtr->coordPtr;
|
653 |
polyPtr->header.x1 = polyPtr->header.x2 = (int) *coordPtr;
|
654 |
polyPtr->header.y1 = polyPtr->header.y2 = (int) coordPtr[1];
|
655 |
|
656 |
/*
|
657 |
* Compute the bounding box of all the points in the polygon,
|
658 |
* then expand in all directions by the outline's width to take
|
659 |
* care of butting or rounded corners and projecting or
|
660 |
* rounded caps. This expansion is an overestimate (worst-case
|
661 |
* is square root of two over two) but it's simple. Don't do
|
662 |
* anything special for curves. This causes an additional
|
663 |
* overestimate in the bounding box, but is faster.
|
664 |
*/
|
665 |
|
666 |
for (i = 1, coordPtr = polyPtr->coordPtr+2; i < polyPtr->numPoints-1;
|
667 |
i++, coordPtr += 2) {
|
668 |
TkIncludePoint((Tk_Item *) polyPtr, coordPtr);
|
669 |
}
|
670 |
|
671 |
tsoffset = &polyPtr->tsoffset;
|
672 |
if (tsoffset->flags & TK_OFFSET_INDEX) {
|
673 |
int index = tsoffset->flags & ~TK_OFFSET_INDEX;
|
674 |
if (tsoffset->flags == INT_MAX) {
|
675 |
index = (polyPtr->numPoints - polyPtr->autoClosed) * 2;
|
676 |
if (index < 0) {
|
677 |
index = 0;
|
678 |
}
|
679 |
}
|
680 |
index %= (polyPtr->numPoints - polyPtr->autoClosed) * 2;
|
681 |
if (index <0) {
|
682 |
index += (polyPtr->numPoints - polyPtr->autoClosed) * 2;
|
683 |
}
|
684 |
tsoffset->xoffset = (int) (polyPtr->coordPtr[index] + 0.5);
|
685 |
tsoffset->yoffset = (int) (polyPtr->coordPtr[index+1] + 0.5);
|
686 |
} else {
|
687 |
if (tsoffset->flags & TK_OFFSET_LEFT) {
|
688 |
tsoffset->xoffset = polyPtr->header.x1;
|
689 |
} else if (tsoffset->flags & TK_OFFSET_CENTER) {
|
690 |
tsoffset->xoffset = (polyPtr->header.x1 + polyPtr->header.x2)/2;
|
691 |
} else if (tsoffset->flags & TK_OFFSET_RIGHT) {
|
692 |
tsoffset->xoffset = polyPtr->header.x2;
|
693 |
}
|
694 |
if (tsoffset->flags & TK_OFFSET_TOP) {
|
695 |
tsoffset->yoffset = polyPtr->header.y1;
|
696 |
} else if (tsoffset->flags & TK_OFFSET_MIDDLE) {
|
697 |
tsoffset->yoffset = (polyPtr->header.y1 + polyPtr->header.y2)/2;
|
698 |
} else if (tsoffset->flags & TK_OFFSET_BOTTOM) {
|
699 |
tsoffset->yoffset = polyPtr->header.y2;
|
700 |
}
|
701 |
}
|
702 |
|
703 |
if (polyPtr->outline.gc != None) {
|
704 |
tsoffset = &polyPtr->outline.tsoffset;
|
705 |
if (tsoffset) {
|
706 |
if (tsoffset->flags & TK_OFFSET_INDEX) {
|
707 |
int index = tsoffset->flags & ~TK_OFFSET_INDEX;
|
708 |
if (tsoffset->flags == INT_MAX) {
|
709 |
index = (polyPtr->numPoints - 1) * 2;
|
710 |
}
|
711 |
index %= (polyPtr->numPoints - 1) * 2;
|
712 |
if (index <0) {
|
713 |
index += (polyPtr->numPoints - 1) * 2;
|
714 |
}
|
715 |
tsoffset->xoffset = (int) (polyPtr->coordPtr[index] + 0.5);
|
716 |
tsoffset->yoffset = (int) (polyPtr->coordPtr[index+1] + 0.5);
|
717 |
} else {
|
718 |
if (tsoffset->flags & TK_OFFSET_LEFT) {
|
719 |
tsoffset->xoffset = polyPtr->header.x1;
|
720 |
} else if (tsoffset->flags & TK_OFFSET_CENTER) {
|
721 |
tsoffset->xoffset = (polyPtr->header.x1 + polyPtr->header.x2)/2;
|
722 |
} else if (tsoffset->flags & TK_OFFSET_RIGHT) {
|
723 |
tsoffset->xoffset = polyPtr->header.x2;
|
724 |
}
|
725 |
if (tsoffset->flags & TK_OFFSET_TOP) {
|
726 |
tsoffset->yoffset = polyPtr->header.y1;
|
727 |
} else if (tsoffset->flags & TK_OFFSET_MIDDLE) {
|
728 |
tsoffset->yoffset = (polyPtr->header.y1 + polyPtr->header.y2)/2;
|
729 |
} else if (tsoffset->flags & TK_OFFSET_BOTTOM) {
|
730 |
tsoffset->yoffset = polyPtr->header.y2;
|
731 |
}
|
732 |
}
|
733 |
}
|
734 |
|
735 |
i = (int) ((width+1.5)/2.0);
|
736 |
polyPtr->header.x1 -= i;
|
737 |
polyPtr->header.x2 += i;
|
738 |
polyPtr->header.y1 -= i;
|
739 |
polyPtr->header.y2 += i;
|
740 |
|
741 |
/*
|
742 |
* For mitered lines, make a second pass through all the points.
|
743 |
* Compute the locations of the two miter vertex points and add
|
744 |
* those into the bounding box.
|
745 |
*/
|
746 |
|
747 |
if (polyPtr->joinStyle == JoinMiter) {
|
748 |
double miter[4];
|
749 |
int j;
|
750 |
coordPtr = polyPtr->coordPtr;
|
751 |
if (polyPtr->numPoints>3) {
|
752 |
if (TkGetMiterPoints(coordPtr+2*(polyPtr->numPoints-2),
|
753 |
coordPtr, coordPtr+2, width,
|
754 |
miter, miter+2)) {
|
755 |
for (j = 0; j < 4; j += 2) {
|
756 |
TkIncludePoint((Tk_Item *) polyPtr, miter+j);
|
757 |
}
|
758 |
}
|
759 |
}
|
760 |
for (i = polyPtr->numPoints ; i >= 3;
|
761 |
i--, coordPtr += 2) {
|
762 |
|
763 |
if (TkGetMiterPoints(coordPtr, coordPtr+2, coordPtr+4,
|
764 |
width, miter, miter+2)) {
|
765 |
for (j = 0; j < 4; j += 2) {
|
766 |
TkIncludePoint((Tk_Item *) polyPtr, miter+j);
|
767 |
}
|
768 |
}
|
769 |
}
|
770 |
}
|
771 |
}
|
772 |
|
773 |
/*
|
774 |
* Add one more pixel of fudge factor just to be safe (e.g.
|
775 |
* X may round differently than we do).
|
776 |
*/
|
777 |
|
778 |
polyPtr->header.x1 -= 1;
|
779 |
polyPtr->header.x2 += 1;
|
780 |
polyPtr->header.y1 -= 1;
|
781 |
polyPtr->header.y2 += 1;
|
782 |
}
|
783 |
|
784 |
/*
|
785 |
*--------------------------------------------------------------
|
786 |
*
|
787 |
* TkFillPolygon --
|
788 |
*
|
789 |
* This procedure is invoked to convert a polygon to screen
|
790 |
* coordinates and display it using a particular GC.
|
791 |
*
|
792 |
* Results:
|
793 |
* None.
|
794 |
*
|
795 |
* Side effects:
|
796 |
* ItemPtr is drawn in drawable using the transformation
|
797 |
* information in canvas.
|
798 |
*
|
799 |
*--------------------------------------------------------------
|
800 |
*/
|
801 |
|
802 |
void
|
803 |
TkFillPolygon(canvas, coordPtr, numPoints, display, drawable, gc, outlineGC)
|
804 |
Tk_Canvas canvas; /* Canvas whose coordinate system
|
805 |
* is to be used for drawing. */
|
806 |
double *coordPtr; /* Array of coordinates for polygon:
|
807 |
* x1, y1, x2, y2, .... */
|
808 |
int numPoints; /* Twice this many coordinates are
|
809 |
* present at *coordPtr. */
|
810 |
Display *display; /* Display on which to draw polygon. */
|
811 |
Drawable drawable; /* Pixmap or window in which to draw
|
812 |
* polygon. */
|
813 |
GC gc; /* Graphics context for drawing. */
|
814 |
GC outlineGC; /* If not None, use this to draw an
|
815 |
* outline around the polygon after
|
816 |
* filling it. */
|
817 |
{
|
818 |
XPoint staticPoints[MAX_STATIC_POINTS];
|
819 |
XPoint *pointPtr;
|
820 |
XPoint *pPtr;
|
821 |
int i;
|
822 |
|
823 |
/*
|
824 |
* Build up an array of points in screen coordinates. Use a
|
825 |
* static array unless the polygon has an enormous number of points;
|
826 |
* in this case, dynamically allocate an array.
|
827 |
*/
|
828 |
|
829 |
if (numPoints <= MAX_STATIC_POINTS) {
|
830 |
pointPtr = staticPoints;
|
831 |
} else {
|
832 |
pointPtr = (XPoint *) ckalloc((unsigned) (numPoints * sizeof(XPoint)));
|
833 |
}
|
834 |
|
835 |
for (i = 0, pPtr = pointPtr; i < numPoints; i += 1, coordPtr += 2, pPtr++) {
|
836 |
Tk_CanvasDrawableCoords(canvas, coordPtr[0], coordPtr[1], &pPtr->x,
|
837 |
&pPtr->y);
|
838 |
}
|
839 |
|
840 |
/*
|
841 |
* Display polygon, then free up polygon storage if it was dynamically
|
842 |
* allocated.
|
843 |
*/
|
844 |
|
845 |
if (gc != None && numPoints>3) {
|
846 |
XFillPolygon(display, drawable, gc, pointPtr, numPoints, Complex,
|
847 |
CoordModeOrigin);
|
848 |
}
|
849 |
if (outlineGC != None) {
|
850 |
XDrawLines(display, drawable, outlineGC, pointPtr,
|
851 |
numPoints, CoordModeOrigin);
|
852 |
}
|
853 |
if (pointPtr != staticPoints) {
|
854 |
ckfree((char *) pointPtr);
|
855 |
}
|
856 |
}
|
857 |
|
858 |
/*
|
859 |
*--------------------------------------------------------------
|
860 |
*
|
861 |
* DisplayPolygon --
|
862 |
*
|
863 |
* This procedure is invoked to draw a polygon item in a given
|
864 |
* drawable.
|
865 |
*
|
866 |
* Results:
|
867 |
* None.
|
868 |
*
|
869 |
* Side effects:
|
870 |
* ItemPtr is drawn in drawable using the transformation
|
871 |
* information in canvas.
|
872 |
*
|
873 |
*--------------------------------------------------------------
|
874 |
*/
|
875 |
|
876 |
static void
|
877 |
DisplayPolygon(canvas, itemPtr, display, drawable, x, y, width, height)
|
878 |
Tk_Canvas canvas; /* Canvas that contains item. */
|
879 |
Tk_Item *itemPtr; /* Item to be displayed. */
|
880 |
Display *display; /* Display on which to draw item. */
|
881 |
Drawable drawable; /* Pixmap or window in which to draw
|
882 |
* item. */
|
883 |
int x, y, width, height; /* Describes region of canvas that
|
884 |
* must be redisplayed (not used). */
|
885 |
{
|
886 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
887 |
Tk_State state = itemPtr->state;
|
888 |
Pixmap stipple = polyPtr->fillStipple;
|
889 |
double linewidth = polyPtr->outline.width;
|
890 |
|
891 |
if (((polyPtr->fillGC == None) && (polyPtr->outline.gc == None)) ||
|
892 |
(polyPtr->numPoints < 1) ||
|
893 |
(polyPtr->numPoints < 3 && polyPtr->outline.gc == None)) {
|
894 |
return;
|
895 |
}
|
896 |
|
897 |
if(state == TK_STATE_NULL) {
|
898 |
state = ((TkCanvas *)canvas)->canvas_state;
|
899 |
}
|
900 |
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
|
901 |
if (polyPtr->outline.activeWidth>linewidth) {
|
902 |
linewidth = polyPtr->outline.activeWidth;
|
903 |
}
|
904 |
if (polyPtr->activeFillStipple != None) {
|
905 |
stipple = polyPtr->activeFillStipple;
|
906 |
}
|
907 |
} else if (state==TK_STATE_DISABLED) {
|
908 |
if (polyPtr->outline.disabledWidth>0.0) {
|
909 |
linewidth = polyPtr->outline.disabledWidth;
|
910 |
}
|
911 |
if (polyPtr->disabledFillStipple != None) {
|
912 |
stipple = polyPtr->disabledFillStipple;
|
913 |
}
|
914 |
}
|
915 |
/*
|
916 |
* If we're stippling then modify the stipple offset in the GC. Be
|
917 |
* sure to reset the offset when done, since the GC is supposed to be
|
918 |
* read-only.
|
919 |
*/
|
920 |
|
921 |
if (stipple != None) {
|
922 |
Tk_TSOffset *tsoffset = &polyPtr->tsoffset;
|
923 |
int w=0; int h=0;
|
924 |
int flags = tsoffset->flags;
|
925 |
if (!(flags & TK_OFFSET_INDEX) && (flags & (TK_OFFSET_CENTER|TK_OFFSET_MIDDLE))) {
|
926 |
Tk_SizeOfBitmap(display, stipple, &w, &h);
|
927 |
if (flags & TK_OFFSET_CENTER) {
|
928 |
w /= 2;
|
929 |
} else {
|
930 |
w = 0;
|
931 |
}
|
932 |
if (flags & TK_OFFSET_MIDDLE) {
|
933 |
h /= 2;
|
934 |
} else {
|
935 |
h = 0;
|
936 |
}
|
937 |
}
|
938 |
tsoffset->xoffset -= w;
|
939 |
tsoffset->yoffset -= h;
|
940 |
Tk_CanvasSetOffset(canvas, polyPtr->fillGC, tsoffset);
|
941 |
tsoffset->xoffset += w;
|
942 |
tsoffset->yoffset += h;
|
943 |
}
|
944 |
Tk_ChangeOutlineGC(canvas, itemPtr, &(polyPtr->outline));
|
945 |
|
946 |
if(polyPtr->numPoints < 3) {
|
947 |
short x,y;
|
948 |
int intLineWidth = (int) (linewidth + 0.5);
|
949 |
if (intLineWidth < 1) {
|
950 |
intLineWidth = 1;
|
951 |
}
|
952 |
Tk_CanvasDrawableCoords(canvas, polyPtr->coordPtr[0],
|
953 |
polyPtr->coordPtr[1], &x,&y);
|
954 |
XFillArc(display, drawable, polyPtr->outline.gc,
|
955 |
x - intLineWidth/2, y - intLineWidth/2,
|
956 |
(unsigned int)intLineWidth+1, (unsigned int)intLineWidth+1,
|
957 |
0, 64*360);
|
958 |
} else if (!polyPtr->smooth || polyPtr->numPoints < 4) {
|
959 |
TkFillPolygon(canvas, polyPtr->coordPtr, polyPtr->numPoints,
|
960 |
display, drawable, polyPtr->fillGC, polyPtr->outline.gc);
|
961 |
} else {
|
962 |
int numPoints;
|
963 |
XPoint staticPoints[MAX_STATIC_POINTS];
|
964 |
XPoint *pointPtr;
|
965 |
|
966 |
/*
|
967 |
* This is a smoothed polygon. Display using a set of generated
|
968 |
* spline points rather than the original points.
|
969 |
*/
|
970 |
|
971 |
numPoints = polyPtr->smooth->coordProc(canvas, (double *) NULL,
|
972 |
polyPtr->numPoints, polyPtr->splineSteps, (XPoint *) NULL,
|
973 |
(double *) NULL);
|
974 |
if (numPoints <= MAX_STATIC_POINTS) {
|
975 |
pointPtr = staticPoints;
|
976 |
} else {
|
977 |
pointPtr = (XPoint *) ckalloc((unsigned)
|
978 |
(numPoints * sizeof(XPoint)));
|
979 |
}
|
980 |
numPoints = polyPtr->smooth->coordProc(canvas, polyPtr->coordPtr,
|
981 |
polyPtr->numPoints, polyPtr->splineSteps, pointPtr,
|
982 |
(double *) NULL);
|
983 |
if (polyPtr->fillGC != None) {
|
984 |
XFillPolygon(display, drawable, polyPtr->fillGC, pointPtr,
|
985 |
numPoints, Complex, CoordModeOrigin);
|
986 |
}
|
987 |
if (polyPtr->outline.gc != None) {
|
988 |
XDrawLines(display, drawable, polyPtr->outline.gc, pointPtr,
|
989 |
numPoints, CoordModeOrigin);
|
990 |
}
|
991 |
if (pointPtr != staticPoints) {
|
992 |
ckfree((char *) pointPtr);
|
993 |
}
|
994 |
}
|
995 |
Tk_ResetOutlineGC(canvas, itemPtr, &(polyPtr->outline));
|
996 |
if (stipple != None) {
|
997 |
XSetTSOrigin(display, polyPtr->fillGC, 0, 0);
|
998 |
}
|
999 |
}
|
1000 |
|
1001 |
/*
|
1002 |
*--------------------------------------------------------------
|
1003 |
*
|
1004 |
* PolygonInsert --
|
1005 |
*
|
1006 |
* Insert coords into a polugon item at a given index.
|
1007 |
*
|
1008 |
* Results:
|
1009 |
* None.
|
1010 |
*
|
1011 |
* Side effects:
|
1012 |
* The coords in the given item is modified.
|
1013 |
*
|
1014 |
*--------------------------------------------------------------
|
1015 |
*/
|
1016 |
|
1017 |
static void
|
1018 |
PolygonInsert(canvas, itemPtr, beforeThis, obj)
|
1019 |
Tk_Canvas canvas; /* Canvas containing text item. */
|
1020 |
Tk_Item *itemPtr; /* Line item to be modified. */
|
1021 |
int beforeThis; /* Index before which new coordinates
|
1022 |
* are to be inserted. */
|
1023 |
Tcl_Obj *obj; /* New coordinates to be inserted. */
|
1024 |
{
|
1025 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
1026 |
int length, argc, i;
|
1027 |
Tcl_Obj **objv;
|
1028 |
double *new;
|
1029 |
Tk_State state = itemPtr->state;
|
1030 |
|
1031 |
if (state == TK_STATE_NULL) {
|
1032 |
state = ((TkCanvas *)canvas)->canvas_state;
|
1033 |
}
|
1034 |
|
1035 |
if (!obj || (Tcl_ListObjGetElements((Tcl_Interp *) NULL, obj, &argc, &objv) != TCL_OK)
|
1036 |
|| !argc || argc&1) {
|
1037 |
return;
|
1038 |
}
|
1039 |
length = 2*(polyPtr->numPoints - polyPtr->autoClosed);
|
1040 |
while(beforeThis>length) beforeThis-=length;
|
1041 |
while(beforeThis<0) beforeThis+=length;
|
1042 |
new = (double *) ckalloc((unsigned)(sizeof(double) * (length + 2 + argc)));
|
1043 |
for (i=0; i<beforeThis; i++) {
|
1044 |
new[i] = polyPtr->coordPtr[i];
|
1045 |
}
|
1046 |
for (i=0; i<argc; i++) {
|
1047 |
if (Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,objv[i],
|
1048 |
new+(i+beforeThis))!=TCL_OK) {
|
1049 |
ckfree((char *) new);
|
1050 |
return;
|
1051 |
}
|
1052 |
}
|
1053 |
|
1054 |
for(i=beforeThis; i<length; i++) {
|
1055 |
new[i+argc] = polyPtr->coordPtr[i];
|
1056 |
}
|
1057 |
if(polyPtr->coordPtr) ckfree((char *) polyPtr->coordPtr);
|
1058 |
length+=argc;
|
1059 |
polyPtr->coordPtr = new;
|
1060 |
polyPtr->numPoints = (length/2) + polyPtr->autoClosed;
|
1061 |
|
1062 |
/*
|
1063 |
* Close the polygon if it isn't already closed, or remove autoclosing
|
1064 |
* if the user's coordinates are now closed.
|
1065 |
*/
|
1066 |
|
1067 |
if (polyPtr->autoClosed) {
|
1068 |
if ((new[length-2] == new[0]) && (new[length-1] == new[1])) {
|
1069 |
polyPtr->autoClosed = 0;
|
1070 |
polyPtr->numPoints--;
|
1071 |
}
|
1072 |
}
|
1073 |
else {
|
1074 |
if ((new[length-2] != new[0]) || (new[length-1] != new[1])) {
|
1075 |
polyPtr->autoClosed = 1;
|
1076 |
polyPtr->numPoints++;
|
1077 |
}
|
1078 |
}
|
1079 |
|
1080 |
new[length] = new[0];
|
1081 |
new[length+1] = new[1];
|
1082 |
if (((length-argc)>3) && (state != TK_STATE_HIDDEN)) {
|
1083 |
/*
|
1084 |
* This is some optimizing code that will result that only the part
|
1085 |
* of the polygon that changed (and the objects that are overlapping
|
1086 |
* with that part) need to be redrawn. A special flag is set that
|
1087 |
* instructs the general canvas code not to redraw the whole
|
1088 |
* object. If this flag is not set, the canvas will do the redrawing,
|
1089 |
* otherwise I have to do it here.
|
1090 |
*/
|
1091 |
double width;
|
1092 |
int j;
|
1093 |
itemPtr->redraw_flags |= TK_ITEM_DONT_REDRAW;
|
1094 |
|
1095 |
/*
|
1096 |
* The header elements that normally are used for the
|
1097 |
* bounding box, are now used to calculate the bounding
|
1098 |
* box for only the part that has to be redrawn. That
|
1099 |
* doesn't matter, because afterwards the bounding
|
1100 |
* box has to be re-calculated anyway.
|
1101 |
*/
|
1102 |
|
1103 |
itemPtr->x1 = itemPtr->x2 = (int) polyPtr->coordPtr[beforeThis];
|
1104 |
itemPtr->y1 = itemPtr->y2 = (int) polyPtr->coordPtr[beforeThis+1];
|
1105 |
beforeThis-=2; argc+=4;
|
1106 |
if(polyPtr->smooth) {
|
1107 |
beforeThis-=2; argc+=4;
|
1108 |
} /* be carefull; beforeThis could now be negative */
|
1109 |
for(i=beforeThis; i<beforeThis+argc; i+=2) {
|
1110 |
j=i;
|
1111 |
if(j<0) j+=length;
|
1112 |
if(j>=length) j-=length;
|
1113 |
TkIncludePoint(itemPtr, polyPtr->coordPtr+j);
|
1114 |
}
|
1115 |
width = polyPtr->outline.width;
|
1116 |
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
|
1117 |
if (polyPtr->outline.activeWidth>width) {
|
1118 |
width = polyPtr->outline.activeWidth;
|
1119 |
}
|
1120 |
} else if (state==TK_STATE_DISABLED) {
|
1121 |
if (polyPtr->outline.disabledWidth>0.0) {
|
1122 |
width = polyPtr->outline.disabledWidth;
|
1123 |
}
|
1124 |
}
|
1125 |
itemPtr->x1 -= (int) width; itemPtr->y1 -= (int) width;
|
1126 |
itemPtr->x2 += (int) width; itemPtr->y2 += (int) width;
|
1127 |
Tk_CanvasEventuallyRedraw(canvas,
|
1128 |
itemPtr->x1, itemPtr->y1,
|
1129 |
itemPtr->x2, itemPtr->y2);
|
1130 |
}
|
1131 |
|
1132 |
ComputePolygonBbox(canvas, polyPtr);
|
1133 |
}
|
1134 |
|
1135 |
/*
|
1136 |
*--------------------------------------------------------------
|
1137 |
*
|
1138 |
* PolygonDeleteCoords --
|
1139 |
*
|
1140 |
* Delete one or more coordinates from a polygon item.
|
1141 |
*
|
1142 |
* Results:
|
1143 |
* None.
|
1144 |
*
|
1145 |
* Side effects:
|
1146 |
* Characters between "first" and "last", inclusive, get
|
1147 |
* deleted from itemPtr.
|
1148 |
*
|
1149 |
*--------------------------------------------------------------
|
1150 |
*/
|
1151 |
|
1152 |
static void
|
1153 |
PolygonDeleteCoords(canvas, itemPtr, first, last)
|
1154 |
Tk_Canvas canvas; /* Canvas containing itemPtr. */
|
1155 |
Tk_Item *itemPtr; /* Item in which to delete characters. */
|
1156 |
int first; /* Index of first character to delete. */
|
1157 |
int last; /* Index of last character to delete. */
|
1158 |
{
|
1159 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
1160 |
int count, i;
|
1161 |
int length = 2*(polyPtr->numPoints - polyPtr->autoClosed);
|
1162 |
|
1163 |
while(first>=length) first-=length;
|
1164 |
while(first<0) first+=length;
|
1165 |
while(last>=length) last-=length;
|
1166 |
while(last<0) last+=length;
|
1167 |
|
1168 |
first &= -2;
|
1169 |
last &= -2;
|
1170 |
|
1171 |
count = last + 2 - first;
|
1172 |
if(count<=0) count +=length;
|
1173 |
|
1174 |
if(count >= length) {
|
1175 |
polyPtr->numPoints = 0;
|
1176 |
if(polyPtr->coordPtr != NULL) {
|
1177 |
ckfree((char *) polyPtr->coordPtr);
|
1178 |
}
|
1179 |
ComputePolygonBbox(canvas, polyPtr);
|
1180 |
return;
|
1181 |
}
|
1182 |
|
1183 |
if(last>=first) {
|
1184 |
for(i=last+2; i<length; i++) {
|
1185 |
polyPtr->coordPtr[i-count] = polyPtr->coordPtr[i];
|
1186 |
}
|
1187 |
} else {
|
1188 |
for(i=last; i<=first; i++) {
|
1189 |
polyPtr->coordPtr[i-last] = polyPtr->coordPtr[i];
|
1190 |
}
|
1191 |
}
|
1192 |
polyPtr->coordPtr[length-count] = polyPtr->coordPtr[0];
|
1193 |
polyPtr->coordPtr[length-count+1] = polyPtr->coordPtr[1];
|
1194 |
polyPtr->numPoints -= count/2;
|
1195 |
ComputePolygonBbox(canvas, polyPtr);
|
1196 |
}
|
1197 |
|
1198 |
/*
|
1199 |
*--------------------------------------------------------------
|
1200 |
*
|
1201 |
* PolygonToPoint --
|
1202 |
*
|
1203 |
* Computes the distance from a given point to a given
|
1204 |
* polygon, in canvas units.
|
1205 |
*
|
1206 |
* Results:
|
1207 |
* The return value is 0 if the point whose x and y coordinates
|
1208 |
* are pointPtr[0] and pointPtr[1] is inside the polygon. If the
|
1209 |
* point isn't inside the polygon then the return value is the
|
1210 |
* distance from the point to the polygon.
|
1211 |
*
|
1212 |
* Side effects:
|
1213 |
* None.
|
1214 |
*
|
1215 |
*--------------------------------------------------------------
|
1216 |
*/
|
1217 |
|
1218 |
/* ARGSUSED */
|
1219 |
static double
|
1220 |
PolygonToPoint(canvas, itemPtr, pointPtr)
|
1221 |
Tk_Canvas canvas; /* Canvas containing item. */
|
1222 |
Tk_Item *itemPtr; /* Item to check against point. */
|
1223 |
double *pointPtr; /* Pointer to x and y coordinates. */
|
1224 |
{
|
1225 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
1226 |
double *coordPtr, *polyPoints;
|
1227 |
double staticSpace[2*MAX_STATIC_POINTS];
|
1228 |
double poly[10];
|
1229 |
double radius;
|
1230 |
double bestDist, dist;
|
1231 |
int numPoints, count;
|
1232 |
int changedMiterToBevel; /* Non-zero means that a mitered corner
|
1233 |
* had to be treated as beveled after all
|
1234 |
* because the angle was < 11 degrees. */
|
1235 |
double width;
|
1236 |
Tk_State state = itemPtr->state;
|
1237 |
|
1238 |
bestDist = 1.0e36;
|
1239 |
|
1240 |
if(state == TK_STATE_NULL) {
|
1241 |
state = ((TkCanvas *)canvas)->canvas_state;
|
1242 |
}
|
1243 |
width = polyPtr->outline.width;
|
1244 |
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
|
1245 |
if (polyPtr->outline.activeWidth>width) {
|
1246 |
width = polyPtr->outline.activeWidth;
|
1247 |
}
|
1248 |
} else if (state==TK_STATE_DISABLED) {
|
1249 |
if (polyPtr->outline.disabledWidth>0.0) {
|
1250 |
width = polyPtr->outline.disabledWidth;
|
1251 |
}
|
1252 |
}
|
1253 |
radius = width/2.0;
|
1254 |
|
1255 |
/*
|
1256 |
* Handle smoothed polygons by generating an expanded set of points
|
1257 |
* against which to do the check.
|
1258 |
*/
|
1259 |
|
1260 |
if ((polyPtr->smooth) && (polyPtr->numPoints>2)) {
|
1261 |
numPoints = polyPtr->smooth->coordProc(canvas, (double *) NULL,
|
1262 |
polyPtr->numPoints, polyPtr->splineSteps, (XPoint *) NULL,
|
1263 |
(double *) NULL);
|
1264 |
if (numPoints <= MAX_STATIC_POINTS) {
|
1265 |
polyPoints = staticSpace;
|
1266 |
} else {
|
1267 |
polyPoints = (double *) ckalloc((unsigned)
|
1268 |
(2*numPoints*sizeof(double)));
|
1269 |
}
|
1270 |
numPoints = polyPtr->smooth->coordProc(canvas, polyPtr->coordPtr,
|
1271 |
polyPtr->numPoints, polyPtr->splineSteps, (XPoint *) NULL,
|
1272 |
polyPoints);
|
1273 |
} else {
|
1274 |
numPoints = polyPtr->numPoints;
|
1275 |
polyPoints = polyPtr->coordPtr;
|
1276 |
}
|
1277 |
|
1278 |
bestDist = TkPolygonToPoint(polyPoints, numPoints, pointPtr);
|
1279 |
if (bestDist<=0.0) {
|
1280 |
goto donepoint;
|
1281 |
}
|
1282 |
if ((polyPtr->outline.gc != None) && (polyPtr->joinStyle == JoinRound)) {
|
1283 |
dist = bestDist - radius;
|
1284 |
if (dist <= 0.0) {
|
1285 |
bestDist = 0.0;
|
1286 |
goto donepoint;
|
1287 |
} else {
|
1288 |
bestDist = dist;
|
1289 |
}
|
1290 |
}
|
1291 |
|
1292 |
if ((polyPtr->outline.gc == None) || (width <= 1)) goto donepoint;
|
1293 |
|
1294 |
/*
|
1295 |
* The overall idea is to iterate through all of the edges of
|
1296 |
* the line, computing a polygon for each edge and testing the
|
1297 |
* point against that polygon. In addition, there are additional
|
1298 |
* tests to deal with rounded joints and caps.
|
1299 |
*/
|
1300 |
|
1301 |
changedMiterToBevel = 0;
|
1302 |
for (count = numPoints, coordPtr = polyPoints; count >= 2;
|
1303 |
count--, coordPtr += 2) {
|
1304 |
|
1305 |
/*
|
1306 |
* If rounding is done around the first point then compute
|
1307 |
* the distance between the point and the point.
|
1308 |
*/
|
1309 |
|
1310 |
if (polyPtr->joinStyle == JoinRound) {
|
1311 |
dist = hypot(coordPtr[0] - pointPtr[0], coordPtr[1] - pointPtr[1])
|
1312 |
- radius;
|
1313 |
if (dist <= 0.0) {
|
1314 |
bestDist = 0.0;
|
1315 |
goto donepoint;
|
1316 |
} else if (dist < bestDist) {
|
1317 |
bestDist = dist;
|
1318 |
}
|
1319 |
}
|
1320 |
|
1321 |
/*
|
1322 |
* Compute the polygonal shape corresponding to this edge,
|
1323 |
* consisting of two points for the first point of the edge
|
1324 |
* and two points for the last point of the edge.
|
1325 |
*/
|
1326 |
|
1327 |
if (count == numPoints) {
|
1328 |
TkGetButtPoints(coordPtr+2, coordPtr, (double) width,
|
1329 |
0, poly, poly+2);
|
1330 |
} else if ((polyPtr->joinStyle == JoinMiter) && !changedMiterToBevel) {
|
1331 |
poly[0] = poly[6];
|
1332 |
poly[1] = poly[7];
|
1333 |
poly[2] = poly[4];
|
1334 |
poly[3] = poly[5];
|
1335 |
} else {
|
1336 |
TkGetButtPoints(coordPtr+2, coordPtr, (double) width, 0,
|
1337 |
poly, poly+2);
|
1338 |
|
1339 |
/*
|
1340 |
* If this line uses beveled joints, then check the distance
|
1341 |
* to a polygon comprising the last two points of the previous
|
1342 |
* polygon and the first two from this polygon; this checks
|
1343 |
* the wedges that fill the mitered joint.
|
1344 |
*/
|
1345 |
|
1346 |
if ((polyPtr->joinStyle == JoinBevel) || changedMiterToBevel) {
|
1347 |
poly[8] = poly[0];
|
1348 |
poly[9] = poly[1];
|
1349 |
dist = TkPolygonToPoint(poly, 5, pointPtr);
|
1350 |
if (dist <= 0.0) {
|
1351 |
bestDist = 0.0;
|
1352 |
goto donepoint;
|
1353 |
} else if (dist < bestDist) {
|
1354 |
bestDist = dist;
|
1355 |
}
|
1356 |
changedMiterToBevel = 0;
|
1357 |
}
|
1358 |
}
|
1359 |
if (count == 2) {
|
1360 |
TkGetButtPoints(coordPtr, coordPtr+2, (double) width,
|
1361 |
0, poly+4, poly+6);
|
1362 |
} else if (polyPtr->joinStyle == JoinMiter) {
|
1363 |
if (TkGetMiterPoints(coordPtr, coordPtr+2, coordPtr+4,
|
1364 |
(double) width, poly+4, poly+6) == 0) {
|
1365 |
changedMiterToBevel = 1;
|
1366 |
TkGetButtPoints(coordPtr, coordPtr+2, (double) width,
|
1367 |
0, poly+4, poly+6);
|
1368 |
}
|
1369 |
} else {
|
1370 |
TkGetButtPoints(coordPtr, coordPtr+2, (double) width, 0,
|
1371 |
poly+4, poly+6);
|
1372 |
}
|
1373 |
poly[8] = poly[0];
|
1374 |
poly[9] = poly[1];
|
1375 |
dist = TkPolygonToPoint(poly, 5, pointPtr);
|
1376 |
if (dist <= 0.0) {
|
1377 |
bestDist = 0.0;
|
1378 |
goto donepoint;
|
1379 |
} else if (dist < bestDist) {
|
1380 |
bestDist = dist;
|
1381 |
}
|
1382 |
}
|
1383 |
|
1384 |
donepoint:
|
1385 |
if ((polyPoints != staticSpace) && polyPoints != polyPtr->coordPtr) {
|
1386 |
ckfree((char *) polyPoints);
|
1387 |
}
|
1388 |
return bestDist;
|
1389 |
}
|
1390 |
|
1391 |
/*
|
1392 |
*--------------------------------------------------------------
|
1393 |
*
|
1394 |
* PolygonToArea --
|
1395 |
*
|
1396 |
* This procedure is called to determine whether an item
|
1397 |
* lies entirely inside, entirely outside, or overlapping
|
1398 |
* a given rectangular area.
|
1399 |
*
|
1400 |
* Results:
|
1401 |
* -1 is returned if the item is entirely outside the area
|
1402 |
* given by rectPtr, 0 if it overlaps, and 1 if it is entirely
|
1403 |
* inside the given area.
|
1404 |
*
|
1405 |
* Side effects:
|
1406 |
* None.
|
1407 |
*
|
1408 |
*--------------------------------------------------------------
|
1409 |
*/
|
1410 |
|
1411 |
/* ARGSUSED */
|
1412 |
static int
|
1413 |
PolygonToArea(canvas, itemPtr, rectPtr)
|
1414 |
Tk_Canvas canvas; /* Canvas containing item. */
|
1415 |
Tk_Item *itemPtr; /* Item to check against polygon. */
|
1416 |
double *rectPtr; /* Pointer to array of four coordinates
|
1417 |
* (x1, y1, x2, y2) describing rectangular
|
1418 |
* area. */
|
1419 |
{
|
1420 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
1421 |
double *coordPtr;
|
1422 |
double staticSpace[2*MAX_STATIC_POINTS];
|
1423 |
double *polyPoints, poly[10];
|
1424 |
double radius;
|
1425 |
int numPoints, count;
|
1426 |
int changedMiterToBevel; /* Non-zero means that a mitered corner
|
1427 |
* had to be treated as beveled after all
|
1428 |
* because the angle was < 11 degrees. */
|
1429 |
int inside; /* Tentative guess about what to return,
|
1430 |
* based on all points seen so far: one
|
1431 |
* means everything seen so far was
|
1432 |
* inside the area; -1 means everything
|
1433 |
* was outside the area. 0 means overlap
|
1434 |
* has been found. */
|
1435 |
double width;
|
1436 |
Tk_State state = itemPtr->state;
|
1437 |
|
1438 |
if(state == TK_STATE_NULL) {
|
1439 |
state = ((TkCanvas *)canvas)->canvas_state;
|
1440 |
}
|
1441 |
|
1442 |
width = polyPtr->outline.width;
|
1443 |
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
|
1444 |
if (polyPtr->outline.activeWidth>width) {
|
1445 |
width = polyPtr->outline.activeWidth;
|
1446 |
}
|
1447 |
} else if (state==TK_STATE_DISABLED) {
|
1448 |
if (polyPtr->outline.disabledWidth>0.0) {
|
1449 |
width = polyPtr->outline.disabledWidth;
|
1450 |
}
|
1451 |
}
|
1452 |
|
1453 |
radius = width/2.0;
|
1454 |
inside = -1;
|
1455 |
|
1456 |
if ((state==TK_STATE_HIDDEN) || polyPtr->numPoints<2) {
|
1457 |
return -1;
|
1458 |
} else if (polyPtr->numPoints <3) {
|
1459 |
double oval[4];
|
1460 |
oval[0] = polyPtr->coordPtr[0]-radius;
|
1461 |
oval[1] = polyPtr->coordPtr[1]-radius;
|
1462 |
oval[2] = polyPtr->coordPtr[0]+radius;
|
1463 |
oval[3] = polyPtr->coordPtr[1]+radius;
|
1464 |
return TkOvalToArea(oval, rectPtr);
|
1465 |
}
|
1466 |
/*
|
1467 |
* Handle smoothed polygons by generating an expanded set of points
|
1468 |
* against which to do the check.
|
1469 |
*/
|
1470 |
|
1471 |
if (polyPtr->smooth) {
|
1472 |
numPoints = polyPtr->smooth->coordProc(canvas, (double *) NULL,
|
1473 |
polyPtr->numPoints, polyPtr->splineSteps, (XPoint *) NULL,
|
1474 |
(double *) NULL);
|
1475 |
if (numPoints <= MAX_STATIC_POINTS) {
|
1476 |
polyPoints = staticSpace;
|
1477 |
} else {
|
1478 |
polyPoints = (double *) ckalloc((unsigned)
|
1479 |
(2*numPoints*sizeof(double)));
|
1480 |
}
|
1481 |
numPoints = polyPtr->smooth->coordProc(canvas, polyPtr->coordPtr,
|
1482 |
polyPtr->numPoints, polyPtr->splineSteps, (XPoint *) NULL,
|
1483 |
polyPoints);
|
1484 |
} else {
|
1485 |
numPoints = polyPtr->numPoints;
|
1486 |
polyPoints = polyPtr->coordPtr;
|
1487 |
}
|
1488 |
|
1489 |
if (polyPtr->fillGC != None) {
|
1490 |
inside = TkPolygonToArea(polyPoints, numPoints, rectPtr);
|
1491 |
if (inside==0) goto donearea;
|
1492 |
} else {
|
1493 |
if ((polyPoints[0] >= rectPtr[0])
|
1494 |
&& (polyPoints[0] <= rectPtr[2])
|
1495 |
&& (polyPoints[1] >= rectPtr[1])
|
1496 |
&& (polyPoints[1] <= rectPtr[3])) {
|
1497 |
inside = 1;
|
1498 |
}
|
1499 |
}
|
1500 |
|
1501 |
if (polyPtr->outline.gc == None) goto donearea ;
|
1502 |
|
1503 |
|
1504 |
/*
|
1505 |
* Iterate through all of the edges of the line, computing a polygon
|
1506 |
* for each edge and testing the area against that polygon. In
|
1507 |
* addition, there are additional tests to deal with rounded joints
|
1508 |
* and caps.
|
1509 |
*/
|
1510 |
|
1511 |
changedMiterToBevel = 0;
|
1512 |
for (count = numPoints, coordPtr = polyPoints; count >= 2;
|
1513 |
count--, coordPtr += 2) {
|
1514 |
|
1515 |
/*
|
1516 |
* If rounding is done around the first point of the edge
|
1517 |
* then test a circular region around the point with the
|
1518 |
* area.
|
1519 |
*/
|
1520 |
|
1521 |
if (polyPtr->joinStyle == JoinRound) {
|
1522 |
poly[0] = coordPtr[0] - radius;
|
1523 |
poly[1] = coordPtr[1] - radius;
|
1524 |
poly[2] = coordPtr[0] + radius;
|
1525 |
poly[3] = coordPtr[1] + radius;
|
1526 |
if (TkOvalToArea(poly, rectPtr) != inside) {
|
1527 |
inside = 0;
|
1528 |
goto donearea;
|
1529 |
}
|
1530 |
}
|
1531 |
|
1532 |
/*
|
1533 |
* Compute the polygonal shape corresponding to this edge,
|
1534 |
* consisting of two points for the first point of the edge
|
1535 |
* and two points for the last point of the edge.
|
1536 |
*/
|
1537 |
|
1538 |
if (count == numPoints) {
|
1539 |
TkGetButtPoints(coordPtr+2, coordPtr, width,
|
1540 |
0, poly, poly+2);
|
1541 |
} else if ((polyPtr->joinStyle == JoinMiter) && !changedMiterToBevel) {
|
1542 |
poly[0] = poly[6];
|
1543 |
poly[1] = poly[7];
|
1544 |
poly[2] = poly[4];
|
1545 |
poly[3] = poly[5];
|
1546 |
} else {
|
1547 |
TkGetButtPoints(coordPtr+2, coordPtr, width, 0,
|
1548 |
poly, poly+2);
|
1549 |
|
1550 |
/*
|
1551 |
* If the last joint was beveled, then also check a
|
1552 |
* polygon comprising the last two points of the previous
|
1553 |
* polygon and the first two from this polygon; this checks
|
1554 |
* the wedges that fill the beveled joint.
|
1555 |
*/
|
1556 |
|
1557 |
if ((polyPtr->joinStyle == JoinBevel) || changedMiterToBevel) {
|
1558 |
poly[8] = poly[0];
|
1559 |
poly[9] = poly[1];
|
1560 |
if (TkPolygonToArea(poly, 5, rectPtr) != inside) {
|
1561 |
inside = 0;
|
1562 |
goto donearea;
|
1563 |
}
|
1564 |
changedMiterToBevel = 0;
|
1565 |
}
|
1566 |
}
|
1567 |
if (count == 2) {
|
1568 |
TkGetButtPoints(coordPtr, coordPtr+2, width,
|
1569 |
0, poly+4, poly+6);
|
1570 |
} else if (polyPtr->joinStyle == JoinMiter) {
|
1571 |
if (TkGetMiterPoints(coordPtr, coordPtr+2, coordPtr+4,
|
1572 |
width, poly+4, poly+6) == 0) {
|
1573 |
changedMiterToBevel = 1;
|
1574 |
TkGetButtPoints(coordPtr, coordPtr+2, width,
|
1575 |
0, poly+4, poly+6);
|
1576 |
}
|
1577 |
} else {
|
1578 |
TkGetButtPoints(coordPtr, coordPtr+2, width, 0,
|
1579 |
poly+4, poly+6);
|
1580 |
}
|
1581 |
poly[8] = poly[0];
|
1582 |
poly[9] = poly[1];
|
1583 |
if (TkPolygonToArea(poly, 5, rectPtr) != inside) {
|
1584 |
inside = 0;
|
1585 |
goto donearea;
|
1586 |
}
|
1587 |
}
|
1588 |
|
1589 |
donearea:
|
1590 |
if ((polyPoints != staticSpace) && (polyPoints != polyPtr->coordPtr)) {
|
1591 |
ckfree((char *) polyPoints);
|
1592 |
}
|
1593 |
return inside;
|
1594 |
}
|
1595 |
|
1596 |
/*
|
1597 |
*--------------------------------------------------------------
|
1598 |
*
|
1599 |
* ScalePolygon --
|
1600 |
*
|
1601 |
* This procedure is invoked to rescale a polygon item.
|
1602 |
*
|
1603 |
* Results:
|
1604 |
* None.
|
1605 |
*
|
1606 |
* Side effects:
|
1607 |
* The polygon referred to by itemPtr is rescaled so that the
|
1608 |
* following transformation is applied to all point
|
1609 |
* coordinates:
|
1610 |
* x' = originX + scaleX*(x-originX)
|
1611 |
* y' = originY + scaleY*(y-originY)
|
1612 |
*
|
1613 |
*--------------------------------------------------------------
|
1614 |
*/
|
1615 |
|
1616 |
static void
|
1617 |
ScalePolygon(canvas, itemPtr, originX, originY, scaleX, scaleY)
|
1618 |
Tk_Canvas canvas; /* Canvas containing polygon. */
|
1619 |
Tk_Item *itemPtr; /* Polygon to be scaled. */
|
1620 |
double originX, originY; /* Origin about which to scale rect. */
|
1621 |
double scaleX; /* Amount to scale in X direction. */
|
1622 |
double scaleY; /* Amount to scale in Y direction. */
|
1623 |
{
|
1624 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
1625 |
double *coordPtr;
|
1626 |
int i;
|
1627 |
|
1628 |
for (i = 0, coordPtr = polyPtr->coordPtr; i < polyPtr->numPoints;
|
1629 |
i++, coordPtr += 2) {
|
1630 |
*coordPtr = originX + scaleX*(*coordPtr - originX);
|
1631 |
coordPtr[1] = originY + scaleY*(coordPtr[1] - originY);
|
1632 |
}
|
1633 |
ComputePolygonBbox(canvas, polyPtr);
|
1634 |
}
|
1635 |
|
1636 |
/*
|
1637 |
*--------------------------------------------------------------
|
1638 |
*
|
1639 |
* GetPolygonIndex --
|
1640 |
*
|
1641 |
* Parse an index into a polygon item and return either its value
|
1642 |
* or an error.
|
1643 |
*
|
1644 |
* Results:
|
1645 |
* A standard Tcl result. If all went well, then *indexPtr is
|
1646 |
* filled in with the index (into itemPtr) corresponding to
|
1647 |
* string. Otherwise an error message is left in
|
1648 |
* interp->result.
|
1649 |
*
|
1650 |
* Side effects:
|
1651 |
* None.
|
1652 |
*
|
1653 |
*--------------------------------------------------------------
|
1654 |
*/
|
1655 |
|
1656 |
static int
|
1657 |
GetPolygonIndex(interp, canvas, itemPtr, obj, indexPtr)
|
1658 |
Tcl_Interp *interp; /* Used for error reporting. */
|
1659 |
Tk_Canvas canvas; /* Canvas containing item. */
|
1660 |
Tk_Item *itemPtr; /* Item for which the index is being
|
1661 |
* specified. */
|
1662 |
Tcl_Obj *obj; /* Specification of a particular coord
|
1663 |
* in itemPtr's line. */
|
1664 |
int *indexPtr; /* Where to store converted index. */
|
1665 |
{
|
1666 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
1667 |
size_t length;
|
1668 |
char *string = Tcl_GetStringFromObj(obj, (int *) &length);
|
1669 |
|
1670 |
if (string[0] == 'e') {
|
1671 |
if (strncmp(string, "end", length) == 0) {
|
1672 |
*indexPtr = 2*(polyPtr->numPoints - polyPtr->autoClosed);
|
1673 |
} else {
|
1674 |
badIndex:
|
1675 |
|
1676 |
/*
|
1677 |
* Some of the paths here leave messages in interp->result,
|
1678 |
* so we have to clear it out before storing our own message.
|
1679 |
*/
|
1680 |
|
1681 |
Tcl_SetResult(interp, (char *) NULL, TCL_STATIC);
|
1682 |
Tcl_AppendResult(interp, "bad index \"", string, "\"",
|
1683 |
(char *) NULL);
|
1684 |
return TCL_ERROR;
|
1685 |
}
|
1686 |
} else if (string[0] == '@') {
|
1687 |
int i;
|
1688 |
double x ,y, bestDist, dist, *coordPtr;
|
1689 |
char *end, *p;
|
1690 |
|
1691 |
p = string+1;
|
1692 |
x = strtod(p, &end);
|
1693 |
if ((end == p) || (*end != ',')) {
|
1694 |
goto badIndex;
|
1695 |
}
|
1696 |
p = end+1;
|
1697 |
y = strtod(p, &end);
|
1698 |
if ((end == p) || (*end != 0)) {
|
1699 |
goto badIndex;
|
1700 |
}
|
1701 |
bestDist = 1.0e36;
|
1702 |
coordPtr = polyPtr->coordPtr;
|
1703 |
*indexPtr = 0;
|
1704 |
for(i=0; i<(polyPtr->numPoints-1); i++) {
|
1705 |
dist = hypot(coordPtr[0] - x, coordPtr[1] - y);
|
1706 |
if (dist<bestDist) {
|
1707 |
bestDist = dist;
|
1708 |
*indexPtr = 2*i;
|
1709 |
}
|
1710 |
coordPtr += 2;
|
1711 |
}
|
1712 |
} else {
|
1713 |
int count = 2*(polyPtr->numPoints - polyPtr->autoClosed);
|
1714 |
if (Tcl_GetIntFromObj(interp, obj, indexPtr) != TCL_OK) {
|
1715 |
goto badIndex;
|
1716 |
}
|
1717 |
*indexPtr &= -2; /* if odd, make it even */
|
1718 |
if (count) {
|
1719 |
if (*indexPtr > 0) {
|
1720 |
*indexPtr = ((*indexPtr - 2) % count) + 2;
|
1721 |
} else {
|
1722 |
*indexPtr = -((-(*indexPtr)) % count);
|
1723 |
}
|
1724 |
} else {
|
1725 |
*indexPtr = 0;
|
1726 |
}
|
1727 |
}
|
1728 |
return TCL_OK;
|
1729 |
}
|
1730 |
|
1731 |
/*
|
1732 |
*--------------------------------------------------------------
|
1733 |
*
|
1734 |
* TranslatePolygon --
|
1735 |
*
|
1736 |
* This procedure is called to move a polygon by a given
|
1737 |
* amount.
|
1738 |
*
|
1739 |
* Results:
|
1740 |
* None.
|
1741 |
*
|
1742 |
* Side effects:
|
1743 |
* The position of the polygon is offset by (xDelta, yDelta),
|
1744 |
* and the bounding box is updated in the generic part of the
|
1745 |
* item structure.
|
1746 |
*
|
1747 |
*--------------------------------------------------------------
|
1748 |
*/
|
1749 |
|
1750 |
static void
|
1751 |
TranslatePolygon(canvas, itemPtr, deltaX, deltaY)
|
1752 |
Tk_Canvas canvas; /* Canvas containing item. */
|
1753 |
Tk_Item *itemPtr; /* Item that is being moved. */
|
1754 |
double deltaX, deltaY; /* Amount by which item is to be
|
1755 |
* moved. */
|
1756 |
{
|
1757 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
1758 |
double *coordPtr;
|
1759 |
int i;
|
1760 |
|
1761 |
for (i = 0, coordPtr = polyPtr->coordPtr; i < polyPtr->numPoints;
|
1762 |
i++, coordPtr += 2) {
|
1763 |
*coordPtr += deltaX;
|
1764 |
coordPtr[1] += deltaY;
|
1765 |
}
|
1766 |
ComputePolygonBbox(canvas, polyPtr);
|
1767 |
}
|
1768 |
|
1769 |
/*
|
1770 |
*--------------------------------------------------------------
|
1771 |
*
|
1772 |
* PolygonToPostscript --
|
1773 |
*
|
1774 |
* This procedure is called to generate Postscript for
|
1775 |
* polygon items.
|
1776 |
*
|
1777 |
* Results:
|
1778 |
* The return value is a standard Tcl result. If an error
|
1779 |
* occurs in generating Postscript then an error message is
|
1780 |
* left in the interp's result, replacing whatever used
|
1781 |
* to be there. If no error occurs, then Postscript for the
|
1782 |
* item is appended to the result.
|
1783 |
*
|
1784 |
* Side effects:
|
1785 |
* None.
|
1786 |
*
|
1787 |
*--------------------------------------------------------------
|
1788 |
*/
|
1789 |
|
1790 |
static int
|
1791 |
PolygonToPostscript(interp, canvas, itemPtr, prepass)
|
1792 |
Tcl_Interp *interp; /* Leave Postscript or error message
|
1793 |
* here. */
|
1794 |
Tk_Canvas canvas; /* Information about overall canvas. */
|
1795 |
Tk_Item *itemPtr; /* Item for which Postscript is
|
1796 |
* wanted. */
|
1797 |
int prepass; /* 1 means this is a prepass to
|
1798 |
* collect font information; 0 means
|
1799 |
* final Postscript is being created. */
|
1800 |
{
|
1801 |
PolygonItem *polyPtr = (PolygonItem *) itemPtr;
|
1802 |
char *style;
|
1803 |
XColor *color;
|
1804 |
XColor *fillColor;
|
1805 |
Pixmap stipple;
|
1806 |
Pixmap fillStipple;
|
1807 |
Tk_State state = itemPtr->state;
|
1808 |
double width;
|
1809 |
|
1810 |
if (polyPtr->numPoints<2 || polyPtr->coordPtr==NULL) {
|
1811 |
return TCL_OK;
|
1812 |
}
|
1813 |
|
1814 |
if(state == TK_STATE_NULL) {
|
1815 |
state = ((TkCanvas *)canvas)->canvas_state;
|
1816 |
}
|
1817 |
width = polyPtr->outline.width;
|
1818 |
color = polyPtr->outline.color;
|
1819 |
stipple = polyPtr->fillStipple;
|
1820 |
fillColor = polyPtr->fillColor;
|
1821 |
fillStipple = polyPtr->fillStipple;
|
1822 |
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
|
1823 |
if (polyPtr->outline.activeWidth>width) {
|
1824 |
width = polyPtr->outline.activeWidth;
|
1825 |
}
|
1826 |
if (polyPtr->outline.activeColor!=NULL) {
|
1827 |
color = polyPtr->outline.activeColor;
|
1828 |
}
|
1829 |
if (polyPtr->outline.activeStipple!=None) {
|
1830 |
stipple = polyPtr->outline.activeStipple;
|
1831 |
}
|
1832 |
if (polyPtr->activeFillColor!=NULL) {
|
1833 |
fillColor = polyPtr->activeFillColor;
|
1834 |
}
|
1835 |
if (polyPtr->activeFillStipple!=None) {
|
1836 |
fillStipple = polyPtr->activeFillStipple;
|
1837 |
}
|
1838 |
} else if (state==TK_STATE_DISABLED) {
|
1839 |
if (polyPtr->outline.disabledWidth>0.0) {
|
1840 |
width = polyPtr->outline.disabledWidth;
|
1841 |
}
|
1842 |
if (polyPtr->outline.disabledColor!=NULL) {
|
1843 |
color = polyPtr->outline.disabledColor;
|
1844 |
}
|
1845 |
if (polyPtr->outline.disabledStipple!=None) {
|
1846 |
stipple = polyPtr->outline.disabledStipple;
|
1847 |
}
|
1848 |
if (polyPtr->disabledFillColor!=NULL) {
|
1849 |
fillColor = polyPtr->disabledFillColor;
|
1850 |
}
|
1851 |
if (polyPtr->disabledFillStipple!=None) {
|
1852 |
fillStipple = polyPtr->disabledFillStipple;
|
1853 |
}
|
1854 |
}
|
1855 |
if (polyPtr->numPoints==2) {
|
1856 |
char string[128];
|
1857 |
sprintf(string, "%.15g %.15g translate %.15g %.15g",
|
1858 |
polyPtr->coordPtr[0], Tk_CanvasPsY(canvas, polyPtr->coordPtr[1]),
|
1859 |
width/2.0, width/2.0);
|
1860 |
Tcl_AppendResult(interp, "matrix currentmatrix\n",string,
|
1861 |
" scale 1 0 moveto 0 0 1 0 360 arc\nsetmatrix\n", (char *) NULL);
|
1862 |
if (Tk_CanvasPsColor(interp, canvas, color)
|
1863 |
!= TCL_OK) {
|
1864 |
return TCL_ERROR;
|
1865 |
}
|
1866 |
if (stipple != None) {
|
1867 |
Tcl_AppendResult(interp, "clip ", (char *) NULL);
|
1868 |
if (Tk_CanvasPsStipple(interp, canvas, stipple) != TCL_OK) {
|
1869 |
return TCL_ERROR;
|
1870 |
}
|
1871 |
} else {
|
1872 |
Tcl_AppendResult(interp, "fill\n", (char *) NULL);
|
1873 |
}
|
1874 |
return TCL_OK;
|
1875 |
}
|
1876 |
|
1877 |
/*
|
1878 |
* Fill the area of the polygon.
|
1879 |
*/
|
1880 |
|
1881 |
if (fillColor != NULL && polyPtr->numPoints>3) {
|
1882 |
if (!polyPtr->smooth || !polyPtr->smooth->postscriptProc) {
|
1883 |
Tk_CanvasPsPath(interp, canvas, polyPtr->coordPtr,
|
1884 |
polyPtr->numPoints);
|
1885 |
} else {
|
1886 |
polyPtr->smooth->postscriptProc(interp, canvas, polyPtr->coordPtr,
|
1887 |
polyPtr->numPoints, polyPtr->splineSteps);
|
1888 |
}
|
1889 |
if (Tk_CanvasPsColor(interp, canvas, fillColor) != TCL_OK) {
|
1890 |
return TCL_ERROR;
|
1891 |
}
|
1892 |
if (fillStipple != None) {
|
1893 |
Tcl_AppendResult(interp, "eoclip ", (char *) NULL);
|
1894 |
if (Tk_CanvasPsStipple(interp, canvas, fillStipple)
|
1895 |
!= TCL_OK) {
|
1896 |
return TCL_ERROR;
|
1897 |
}
|
1898 |
if (color != NULL) {
|
1899 |
Tcl_AppendResult(interp, "grestore gsave\n", (char *) NULL);
|
1900 |
}
|
1901 |
} else {
|
1902 |
Tcl_AppendResult(interp, "eofill\n", (char *) NULL);
|
1903 |
}
|
1904 |
}
|
1905 |
|
1906 |
/*
|
1907 |
* Now draw the outline, if there is one.
|
1908 |
*/
|
1909 |
|
1910 |
if (color != NULL) {
|
1911 |
|
1912 |
if (!polyPtr->smooth || !polyPtr->smooth->postscriptProc) {
|
1913 |
Tk_CanvasPsPath(interp, canvas, polyPtr->coordPtr,
|
1914 |
polyPtr->numPoints);
|
1915 |
} else {
|
1916 |
polyPtr->smooth->postscriptProc(interp, canvas, polyPtr->coordPtr,
|
1917 |
polyPtr->numPoints, polyPtr->splineSteps);
|
1918 |
}
|
1919 |
|
1920 |
if (polyPtr->joinStyle == JoinRound) {
|
1921 |
style = "1";
|
1922 |
} else if (polyPtr->joinStyle == JoinBevel) {
|
1923 |
style = "2";
|
1924 |
} else {
|
1925 |
style = "0";
|
1926 |
}
|
1927 |
Tcl_AppendResult(interp, style," setlinejoin 1 setlinecap\n",
|
1928 |
(char *) NULL);
|
1929 |
if (Tk_CanvasPsOutline(canvas, itemPtr,
|
1930 |
&(polyPtr->outline)) != TCL_OK) {
|
1931 |
return TCL_ERROR;
|
1932 |
}
|
1933 |
}
|
1934 |
return TCL_OK;
|
1935 |
}
|
1936 |
|
1937 |
/* End of tkcanvpoly.c */
|