|
/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkcanvimg.c,v 1.1.1.1 2001/06/13 04:56:24 dtashley Exp $ */ |
|
|
|
|
|
/* |
|
|
* tkCanvImg.c -- |
|
|
* |
|
|
* This file implements image items for canvas widgets. |
|
|
* |
|
|
* Copyright (c) 1994 The Regents of the University of California. |
|
|
* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
|
|
* |
|
|
* See the file "license.terms" for information on usage and redistribution |
|
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
|
|
* |
|
|
* RCS: @(#) $Id: tkcanvimg.c,v 1.1.1.1 2001/06/13 04:56:24 dtashley Exp $ |
|
|
*/ |
|
|
|
|
|
#include <stdio.h> |
|
|
#include "tkInt.h" |
|
|
#include "tkPort.h" |
|
|
#include "tkCanvas.h" |
|
|
|
|
|
/* |
|
|
* The structure below defines the record for each image item. |
|
|
*/ |
|
|
|
|
|
typedef struct ImageItem { |
|
|
Tk_Item header; /* Generic stuff that's the same for all |
|
|
* types. MUST BE FIRST IN STRUCTURE. */ |
|
|
Tk_Canvas canvas; /* Canvas containing the image. */ |
|
|
double x, y; /* Coordinates of positioning point for |
|
|
* image. */ |
|
|
Tk_Anchor anchor; /* Where to anchor image relative to |
|
|
* (x,y). */ |
|
|
char *imageString; /* String describing -image option (malloc-ed). |
|
|
* NULL means no image right now. */ |
|
|
char *activeImageString; /* String describing -activeimage option. |
|
|
* NULL means no image right now. */ |
|
|
char *disabledImageString; /* String describing -disabledimage option. |
|
|
* NULL means no image right now. */ |
|
|
Tk_Image image; /* Image to display in window, or NULL if |
|
|
* no image at present. */ |
|
|
Tk_Image activeImage; /* Image to display in window, or NULL if |
|
|
* no image at present. */ |
|
|
Tk_Image disabledImage; /* Image to display in window, or NULL if |
|
|
* no image at present. */ |
|
|
} ImageItem; |
|
|
|
|
|
/* |
|
|
* Information used for parsing configuration specs: |
|
|
*/ |
|
|
|
|
|
static Tk_CustomOption stateOption = { |
|
|
(Tk_OptionParseProc *) TkStateParseProc, |
|
|
TkStatePrintProc, (ClientData) 2 |
|
|
}; |
|
|
static Tk_CustomOption tagsOption = { |
|
|
(Tk_OptionParseProc *) Tk_CanvasTagsParseProc, |
|
|
Tk_CanvasTagsPrintProc, (ClientData) NULL |
|
|
}; |
|
|
|
|
|
static Tk_ConfigSpec configSpecs[] = { |
|
|
{TK_CONFIG_STRING, "-activeimage", (char *) NULL, (char *) NULL, |
|
|
(char *) NULL, Tk_Offset(ImageItem, activeImageString), |
|
|
TK_CONFIG_NULL_OK}, |
|
|
{TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL, |
|
|
"center", Tk_Offset(ImageItem, anchor), TK_CONFIG_DONT_SET_DEFAULT}, |
|
|
{TK_CONFIG_STRING, "-disabledimage", (char *) NULL, (char *) NULL, |
|
|
(char *) NULL, Tk_Offset(ImageItem, disabledImageString), |
|
|
TK_CONFIG_NULL_OK}, |
|
|
{TK_CONFIG_STRING, "-image", (char *) NULL, (char *) NULL, |
|
|
(char *) NULL, Tk_Offset(ImageItem, imageString), TK_CONFIG_NULL_OK}, |
|
|
{TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL, |
|
|
(char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, |
|
|
&stateOption}, |
|
|
{TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL, |
|
|
(char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, |
|
|
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL, |
|
|
(char *) NULL, 0, 0} |
|
|
}; |
|
|
|
|
|
/* |
|
|
* Prototypes for procedures defined in this file: |
|
|
*/ |
|
|
|
|
|
static void ImageChangedProc _ANSI_ARGS_((ClientData clientData, |
|
|
int x, int y, int width, int height, int imgWidth, |
|
|
int imgHeight)); |
|
|
static int ImageCoords _ANSI_ARGS_((Tcl_Interp *interp, |
|
|
Tk_Canvas canvas, Tk_Item *itemPtr, int argc, |
|
|
Tcl_Obj *CONST argv[])); |
|
|
static int ImageToArea _ANSI_ARGS_((Tk_Canvas canvas, |
|
|
Tk_Item *itemPtr, double *rectPtr)); |
|
|
static double ImageToPoint _ANSI_ARGS_((Tk_Canvas canvas, |
|
|
Tk_Item *itemPtr, double *coordPtr)); |
|
|
static int ImageToPostscript _ANSI_ARGS_((Tcl_Interp *interp, |
|
|
Tk_Canvas canvas, Tk_Item *itemPtr, int prepass)); |
|
|
static void ComputeImageBbox _ANSI_ARGS_((Tk_Canvas canvas, |
|
|
ImageItem *imgPtr)); |
|
|
static int ConfigureImage _ANSI_ARGS_((Tcl_Interp *interp, |
|
|
Tk_Canvas canvas, Tk_Item *itemPtr, int argc, |
|
|
Tcl_Obj *CONST argv[], int flags)); |
|
|
static int CreateImage _ANSI_ARGS_((Tcl_Interp *interp, |
|
|
Tk_Canvas canvas, struct Tk_Item *itemPtr, |
|
|
int argc, Tcl_Obj *CONST argv[])); |
|
|
static void DeleteImage _ANSI_ARGS_((Tk_Canvas canvas, |
|
|
Tk_Item *itemPtr, Display *display)); |
|
|
static void DisplayImage _ANSI_ARGS_((Tk_Canvas canvas, |
|
|
Tk_Item *itemPtr, Display *display, Drawable dst, |
|
|
int x, int y, int width, int height)); |
|
|
static void ScaleImage _ANSI_ARGS_((Tk_Canvas canvas, |
|
|
Tk_Item *itemPtr, double originX, double originY, |
|
|
double scaleX, double scaleY)); |
|
|
static void TranslateImage _ANSI_ARGS_((Tk_Canvas canvas, |
|
|
Tk_Item *itemPtr, double deltaX, double deltaY)); |
|
|
|
|
|
/* |
|
|
* The structures below defines the image item type in terms of |
|
|
* procedures that can be invoked by generic item code. |
|
|
*/ |
|
|
|
|
|
Tk_ItemType tkImageType = { |
|
|
"image", /* name */ |
|
|
sizeof(ImageItem), /* itemSize */ |
|
|
CreateImage, /* createProc */ |
|
|
configSpecs, /* configSpecs */ |
|
|
ConfigureImage, /* configureProc */ |
|
|
ImageCoords, /* coordProc */ |
|
|
DeleteImage, /* deleteProc */ |
|
|
DisplayImage, /* displayProc */ |
|
|
TK_CONFIG_OBJS, /* flags */ |
|
|
ImageToPoint, /* pointProc */ |
|
|
ImageToArea, /* areaProc */ |
|
|
ImageToPostscript, /* postscriptProc */ |
|
|
ScaleImage, /* scaleProc */ |
|
|
TranslateImage, /* translateProc */ |
|
|
(Tk_ItemIndexProc *) NULL, /* indexProc */ |
|
|
(Tk_ItemCursorProc *) NULL, /* icursorProc */ |
|
|
(Tk_ItemSelectionProc *) NULL, /* selectionProc */ |
|
|
(Tk_ItemInsertProc *) NULL, /* insertProc */ |
|
|
(Tk_ItemDCharsProc *) NULL, /* dTextProc */ |
|
|
(Tk_ItemType *) NULL, /* nextPtr */ |
|
|
}; |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* CreateImage -- |
|
|
* |
|
|
* This procedure is invoked to create a new image |
|
|
* item in a canvas. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl return value. If an error occurred in |
|
|
* creating the item, then an error message is left in |
|
|
* the interp's result; in this case itemPtr is left uninitialized, |
|
|
* so it can be safely freed by the caller. |
|
|
* |
|
|
* Side effects: |
|
|
* A new image item is created. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
CreateImage(interp, canvas, itemPtr, argc, argv) |
|
|
Tcl_Interp *interp; /* Interpreter for error reporting. */ |
|
|
Tk_Canvas canvas; /* Canvas to hold new item. */ |
|
|
Tk_Item *itemPtr; /* Record to hold new item; header |
|
|
* has been initialized by caller. */ |
|
|
int argc; /* Number of arguments in argv. */ |
|
|
Tcl_Obj *CONST argv[]; /* Arguments describing rectangle. */ |
|
|
{ |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
|
|
int i; |
|
|
|
|
|
if (argc==1) { |
|
|
i = 1; |
|
|
} else { |
|
|
char *arg = Tcl_GetStringFromObj((Tcl_Obj *) argv[1], NULL); |
|
|
if (((argc>1) && (arg[0] == '-') |
|
|
&& (arg[1] >= 'a') && (arg[1] <= 'z'))) { |
|
|
i = 1; |
|
|
} else { |
|
|
i = 2; |
|
|
} |
|
|
} |
|
|
|
|
|
if (argc < i) { |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", |
|
|
Tk_PathName(Tk_CanvasTkwin(canvas)), " create ", |
|
|
itemPtr->typePtr->name, " x y ?options?\"", |
|
|
(char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Initialize item's record. |
|
|
*/ |
|
|
|
|
|
imgPtr->canvas = canvas; |
|
|
imgPtr->anchor = TK_ANCHOR_CENTER; |
|
|
imgPtr->imageString = NULL; |
|
|
imgPtr->activeImageString = NULL; |
|
|
imgPtr->disabledImageString = NULL; |
|
|
imgPtr->image = NULL; |
|
|
imgPtr->activeImage = NULL; |
|
|
imgPtr->disabledImage = NULL; |
|
|
|
|
|
/* |
|
|
* Process the arguments to fill in the item record. |
|
|
*/ |
|
|
|
|
|
if ((ImageCoords(interp, canvas, itemPtr, i, argv) != TCL_OK)) { |
|
|
goto error; |
|
|
} |
|
|
if (ConfigureImage(interp, canvas, itemPtr, argc-i, argv+i, 0) == TCL_OK) { |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
error: |
|
|
DeleteImage(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas))); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ImageCoords -- |
|
|
* |
|
|
* This procedure is invoked to process the "coords" widget |
|
|
* command on image items. See the user documentation for |
|
|
* details on what it does. |
|
|
* |
|
|
* Results: |
|
|
* Returns TCL_OK or TCL_ERROR, and sets the interp's result. |
|
|
* |
|
|
* Side effects: |
|
|
* The coordinates for the given item may be changed. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
ImageCoords(interp, canvas, itemPtr, argc, argv) |
|
|
Tcl_Interp *interp; /* Used for error reporting. */ |
|
|
Tk_Canvas canvas; /* Canvas containing item. */ |
|
|
Tk_Item *itemPtr; /* Item whose coordinates are to be |
|
|
* read or modified. */ |
|
|
int argc; /* Number of coordinates supplied in |
|
|
* argv. */ |
|
|
Tcl_Obj *CONST argv[]; /* Array of coordinates: x1, y1, |
|
|
* x2, y2, ... */ |
|
|
{ |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
|
|
|
|
|
if (argc == 0) { |
|
|
Tcl_Obj *obj = Tcl_NewObj(); |
|
|
Tcl_Obj *subobj = Tcl_NewDoubleObj(imgPtr->x); |
|
|
Tcl_ListObjAppendElement(interp, obj, subobj); |
|
|
subobj = Tcl_NewDoubleObj(imgPtr->y); |
|
|
Tcl_ListObjAppendElement(interp, obj, subobj); |
|
|
Tcl_SetObjResult(interp, obj); |
|
|
} else if (argc < 3) { |
|
|
if (argc==1) { |
|
|
if (Tcl_ListObjGetElements(interp, argv[0], &argc, |
|
|
(Tcl_Obj ***) &argv) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} else if (argc != 2) { |
|
|
char buf[64]; |
|
|
|
|
|
sprintf(buf, "wrong # coordinates: expected 2, got %d", argc); |
|
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
if ((Tk_CanvasGetCoordFromObj(interp, canvas, argv[0], &imgPtr->x) != TCL_OK) |
|
|
|| (Tk_CanvasGetCoordFromObj(interp, canvas, argv[1], |
|
|
&imgPtr->y) != TCL_OK)) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
ComputeImageBbox(canvas, imgPtr); |
|
|
} else { |
|
|
char buf[64]; |
|
|
|
|
|
sprintf(buf, "wrong # coordinates: expected 0 or 2, got %d", argc); |
|
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ConfigureImage -- |
|
|
* |
|
|
* This procedure is invoked to configure various aspects |
|
|
* of an image item, such as its anchor position. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl result code. If an error occurs, then |
|
|
* an error message is left in the interp's result. |
|
|
* |
|
|
* Side effects: |
|
|
* Configuration information may be set for itemPtr. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
ConfigureImage(interp, canvas, itemPtr, argc, argv, flags) |
|
|
Tcl_Interp *interp; /* Used for error reporting. */ |
|
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
|
|
Tk_Item *itemPtr; /* Image item to reconfigure. */ |
|
|
int argc; /* Number of elements in argv. */ |
|
|
Tcl_Obj *CONST argv[]; /* Arguments describing things to configure. */ |
|
|
int flags; /* Flags to pass to Tk_ConfigureWidget. */ |
|
|
{ |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
|
|
Tk_Window tkwin; |
|
|
Tk_Image image; |
|
|
|
|
|
tkwin = Tk_CanvasTkwin(canvas); |
|
|
if (Tk_ConfigureWidget(interp, tkwin, configSpecs, argc, (char **) argv, |
|
|
(char *) imgPtr, flags|TK_CONFIG_OBJS) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Create the image. Save the old image around and don't free it |
|
|
* until after the new one is allocated. This keeps the reference |
|
|
* count from going to zero so the image doesn't have to be recreated |
|
|
* if it hasn't changed. |
|
|
*/ |
|
|
|
|
|
if (imgPtr->activeImageString != NULL) { |
|
|
itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT; |
|
|
} else { |
|
|
itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT; |
|
|
} |
|
|
if (imgPtr->imageString != NULL) { |
|
|
image = Tk_GetImage(interp, tkwin, imgPtr->imageString, |
|
|
ImageChangedProc, (ClientData) imgPtr); |
|
|
if (image == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} else { |
|
|
image = NULL; |
|
|
} |
|
|
if (imgPtr->image != NULL) { |
|
|
Tk_FreeImage(imgPtr->image); |
|
|
} |
|
|
imgPtr->image = image; |
|
|
if (imgPtr->activeImageString != NULL) { |
|
|
image = Tk_GetImage(interp, tkwin, imgPtr->activeImageString, |
|
|
ImageChangedProc, (ClientData) imgPtr); |
|
|
if (image == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} else { |
|
|
image = NULL; |
|
|
} |
|
|
if (imgPtr->activeImage != NULL) { |
|
|
Tk_FreeImage(imgPtr->activeImage); |
|
|
} |
|
|
imgPtr->activeImage = image; |
|
|
if (imgPtr->disabledImageString != NULL) { |
|
|
image = Tk_GetImage(interp, tkwin, imgPtr->disabledImageString, |
|
|
ImageChangedProc, (ClientData) imgPtr); |
|
|
if (image == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} else { |
|
|
image = NULL; |
|
|
} |
|
|
if (imgPtr->disabledImage != NULL) { |
|
|
Tk_FreeImage(imgPtr->disabledImage); |
|
|
} |
|
|
imgPtr->disabledImage = image; |
|
|
ComputeImageBbox(canvas, imgPtr); |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* DeleteImage -- |
|
|
* |
|
|
* This procedure is called to clean up the data structure |
|
|
* associated with a image item. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Resources associated with itemPtr are released. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DeleteImage(canvas, itemPtr, display) |
|
|
Tk_Canvas canvas; /* Info about overall canvas widget. */ |
|
|
Tk_Item *itemPtr; /* Item that is being deleted. */ |
|
|
Display *display; /* Display containing window for |
|
|
* canvas. */ |
|
|
{ |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
|
|
|
|
|
if (imgPtr->imageString != NULL) { |
|
|
ckfree(imgPtr->imageString); |
|
|
} |
|
|
if (imgPtr->activeImageString != NULL) { |
|
|
ckfree(imgPtr->activeImageString); |
|
|
} |
|
|
if (imgPtr->disabledImageString != NULL) { |
|
|
ckfree(imgPtr->disabledImageString); |
|
|
} |
|
|
if (imgPtr->image != NULL) { |
|
|
Tk_FreeImage(imgPtr->image); |
|
|
} |
|
|
if (imgPtr->activeImage != NULL) { |
|
|
Tk_FreeImage(imgPtr->activeImage); |
|
|
} |
|
|
if (imgPtr->disabledImage != NULL) { |
|
|
Tk_FreeImage(imgPtr->disabledImage); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ComputeImageBbox -- |
|
|
* |
|
|
* This procedure is invoked to compute the bounding box of |
|
|
* all the pixels that may be drawn as part of a image item. |
|
|
* This procedure is where the child image's placement is |
|
|
* computed. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The fields x1, y1, x2, and y2 are updated in the header |
|
|
* for itemPtr. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
static void |
|
|
ComputeImageBbox(canvas, imgPtr) |
|
|
Tk_Canvas canvas; /* Canvas that contains item. */ |
|
|
ImageItem *imgPtr; /* Item whose bbox is to be |
|
|
* recomputed. */ |
|
|
{ |
|
|
int width, height; |
|
|
int x, y; |
|
|
Tk_Image image; |
|
|
Tk_State state = imgPtr->header.state; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
image = imgPtr->image; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == (Tk_Item *)imgPtr) { |
|
|
if (imgPtr->activeImage != NULL) { |
|
|
image = imgPtr->activeImage; |
|
|
} |
|
|
} else if (state == TK_STATE_DISABLED) { |
|
|
if (imgPtr->disabledImage != NULL) { |
|
|
image = imgPtr->disabledImage; |
|
|
} |
|
|
} |
|
|
|
|
|
x = (int) (imgPtr->x + ((imgPtr->x >= 0) ? 0.5 : - 0.5)); |
|
|
y = (int) (imgPtr->y + ((imgPtr->y >= 0) ? 0.5 : - 0.5)); |
|
|
|
|
|
if ((state == TK_STATE_HIDDEN) || (image == None)) { |
|
|
imgPtr->header.x1 = imgPtr->header.x2 = x; |
|
|
imgPtr->header.y1 = imgPtr->header.y2 = y; |
|
|
return; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Compute location and size of image, using anchor information. |
|
|
*/ |
|
|
|
|
|
Tk_SizeOfImage(image, &width, &height); |
|
|
switch (imgPtr->anchor) { |
|
|
case TK_ANCHOR_N: |
|
|
x -= width/2; |
|
|
break; |
|
|
case TK_ANCHOR_NE: |
|
|
x -= width; |
|
|
break; |
|
|
case TK_ANCHOR_E: |
|
|
x -= width; |
|
|
y -= height/2; |
|
|
break; |
|
|
case TK_ANCHOR_SE: |
|
|
x -= width; |
|
|
y -= height; |
|
|
break; |
|
|
case TK_ANCHOR_S: |
|
|
x -= width/2; |
|
|
y -= height; |
|
|
break; |
|
|
case TK_ANCHOR_SW: |
|
|
y -= height; |
|
|
break; |
|
|
case TK_ANCHOR_W: |
|
|
y -= height/2; |
|
|
break; |
|
|
case TK_ANCHOR_NW: |
|
|
break; |
|
|
case TK_ANCHOR_CENTER: |
|
|
x -= width/2; |
|
|
y -= height/2; |
|
|
break; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Store the information in the item header. |
|
|
*/ |
|
|
|
|
|
imgPtr->header.x1 = x; |
|
|
imgPtr->header.y1 = y; |
|
|
imgPtr->header.x2 = x + width; |
|
|
imgPtr->header.y2 = y + height; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* DisplayImage -- |
|
|
* |
|
|
* This procedure is invoked to draw a image item in a given |
|
|
* drawable. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* ItemPtr is drawn in drawable using the transformation |
|
|
* information in canvas. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DisplayImage(canvas, itemPtr, display, drawable, x, y, width, height) |
|
|
Tk_Canvas canvas; /* Canvas that contains item. */ |
|
|
Tk_Item *itemPtr; /* Item to be displayed. */ |
|
|
Display *display; /* Display on which to draw item. */ |
|
|
Drawable drawable; /* Pixmap or window in which to draw |
|
|
* item. */ |
|
|
int x, y, width, height; /* Describes region of canvas that |
|
|
* must be redisplayed (not used). */ |
|
|
{ |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
|
|
short drawableX, drawableY; |
|
|
Tk_Image image; |
|
|
Tk_State state = itemPtr->state; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
|
|
|
image = imgPtr->image; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
|
|
if (imgPtr->activeImage != NULL) { |
|
|
image = imgPtr->activeImage; |
|
|
} |
|
|
} else if (state == TK_STATE_DISABLED) { |
|
|
if (imgPtr->disabledImage != NULL) { |
|
|
image = imgPtr->disabledImage; |
|
|
} |
|
|
} |
|
|
|
|
|
if (image == NULL) { |
|
|
return; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Translate the coordinates to those of the image, then redisplay it. |
|
|
*/ |
|
|
|
|
|
Tk_CanvasDrawableCoords(canvas, (double) x, (double) y, |
|
|
&drawableX, &drawableY); |
|
|
Tk_RedrawImage(image, x - imgPtr->header.x1, y - imgPtr->header.y1, |
|
|
width, height, drawable, drawableX, drawableY); |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ImageToPoint -- |
|
|
* |
|
|
* Computes the distance from a given point to a given |
|
|
* rectangle, in canvas units. |
|
|
* |
|
|
* Results: |
|
|
* The return value is 0 if the point whose x and y coordinates |
|
|
* are coordPtr[0] and coordPtr[1] is inside the image. If the |
|
|
* point isn't inside the image then the return value is the |
|
|
* distance from the point to the image. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static double |
|
|
ImageToPoint(canvas, itemPtr, coordPtr) |
|
|
Tk_Canvas canvas; /* Canvas containing item. */ |
|
|
Tk_Item *itemPtr; /* Item to check against point. */ |
|
|
double *coordPtr; /* Pointer to x and y coordinates. */ |
|
|
{ |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
|
|
double x1, x2, y1, y2, xDiff, yDiff; |
|
|
|
|
|
x1 = imgPtr->header.x1; |
|
|
y1 = imgPtr->header.y1; |
|
|
x2 = imgPtr->header.x2; |
|
|
y2 = imgPtr->header.y2; |
|
|
|
|
|
/* |
|
|
* Point is outside rectangle. |
|
|
*/ |
|
|
|
|
|
if (coordPtr[0] < x1) { |
|
|
xDiff = x1 - coordPtr[0]; |
|
|
} else if (coordPtr[0] > x2) { |
|
|
xDiff = coordPtr[0] - x2; |
|
|
} else { |
|
|
xDiff = 0; |
|
|
} |
|
|
|
|
|
if (coordPtr[1] < y1) { |
|
|
yDiff = y1 - coordPtr[1]; |
|
|
} else if (coordPtr[1] > y2) { |
|
|
yDiff = coordPtr[1] - y2; |
|
|
} else { |
|
|
yDiff = 0; |
|
|
} |
|
|
|
|
|
return hypot(xDiff, yDiff); |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ImageToArea -- |
|
|
* |
|
|
* This procedure is called to determine whether an item |
|
|
* lies entirely inside, entirely outside, or overlapping |
|
|
* a given rectangle. |
|
|
* |
|
|
* Results: |
|
|
* -1 is returned if the item is entirely outside the area |
|
|
* given by rectPtr, 0 if it overlaps, and 1 if it is entirely |
|
|
* inside the given area. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
ImageToArea(canvas, itemPtr, rectPtr) |
|
|
Tk_Canvas canvas; /* Canvas containing item. */ |
|
|
Tk_Item *itemPtr; /* Item to check against rectangle. */ |
|
|
double *rectPtr; /* Pointer to array of four coordinates |
|
|
* (x1, y1, x2, y2) describing rectangular |
|
|
* area. */ |
|
|
{ |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
|
|
|
|
|
if ((rectPtr[2] <= imgPtr->header.x1) |
|
|
|| (rectPtr[0] >= imgPtr->header.x2) |
|
|
|| (rectPtr[3] <= imgPtr->header.y1) |
|
|
|| (rectPtr[1] >= imgPtr->header.y2)) { |
|
|
return -1; |
|
|
} |
|
|
if ((rectPtr[0] <= imgPtr->header.x1) |
|
|
&& (rectPtr[1] <= imgPtr->header.y1) |
|
|
&& (rectPtr[2] >= imgPtr->header.x2) |
|
|
&& (rectPtr[3] >= imgPtr->header.y2)) { |
|
|
return 1; |
|
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ImageToPostscript -- |
|
|
* |
|
|
* This procedure is called to generate Postscript for |
|
|
* image items. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a standard Tcl result. If an error |
|
|
* occurs in generating Postscript then an error message is |
|
|
* left in interp->result, replacing whatever used to be there. |
|
|
* If no error occurs, then Postscript for the item is appended |
|
|
* to the result. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
ImageToPostscript(interp, canvas, itemPtr, prepass) |
|
|
Tcl_Interp *interp; /* Leave Postscript or error message |
|
|
* here. */ |
|
|
Tk_Canvas canvas; /* Information about overall canvas. */ |
|
|
Tk_Item *itemPtr; /* Item for which Postscript is |
|
|
* wanted. */ |
|
|
int prepass; /* 1 means this is a prepass to |
|
|
* collect font information; 0 means |
|
|
* final Postscript is being created.*/ |
|
|
{ |
|
|
ImageItem *imgPtr = (ImageItem *)itemPtr; |
|
|
Tk_Window canvasWin = Tk_CanvasTkwin(canvas); |
|
|
|
|
|
char buffer[256]; |
|
|
double x, y; |
|
|
int width, height; |
|
|
Tk_Image image; |
|
|
Tk_State state = itemPtr->state; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
|
|
|
image = imgPtr->image; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
|
|
if (imgPtr->activeImage != NULL) { |
|
|
image = imgPtr->activeImage; |
|
|
} |
|
|
} else if (state == TK_STATE_DISABLED) { |
|
|
if (imgPtr->disabledImage != NULL) { |
|
|
image = imgPtr->disabledImage; |
|
|
} |
|
|
} |
|
|
Tk_SizeOfImage(image, &width, &height); |
|
|
|
|
|
/* |
|
|
* Compute the coordinates of the lower-left corner of the image, |
|
|
* taking into account the anchor position for the image. |
|
|
*/ |
|
|
|
|
|
x = imgPtr->x; |
|
|
y = Tk_CanvasPsY(canvas, imgPtr->y); |
|
|
|
|
|
switch (imgPtr->anchor) { |
|
|
case TK_ANCHOR_NW: y -= height; break; |
|
|
case TK_ANCHOR_N: x -= width/2.0; y -= height; break; |
|
|
case TK_ANCHOR_NE: x -= width; y -= height; break; |
|
|
case TK_ANCHOR_E: x -= width; y -= height/2.0; break; |
|
|
case TK_ANCHOR_SE: x -= width; break; |
|
|
case TK_ANCHOR_S: x -= width/2.0; break; |
|
|
case TK_ANCHOR_SW: break; |
|
|
case TK_ANCHOR_W: y -= height/2.0; break; |
|
|
case TK_ANCHOR_CENTER: x -= width/2.0; y -= height/2.0; break; |
|
|
} |
|
|
|
|
|
if (image == NULL) { |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
if (!prepass) { |
|
|
sprintf(buffer, "%.15g %.15g", x, y); |
|
|
Tcl_AppendResult(interp, buffer, " translate\n", (char *) NULL); |
|
|
} |
|
|
|
|
|
return Tk_PostscriptImage(image, interp, canvasWin, |
|
|
((TkCanvas *) canvas)->psInfo, 0, 0, width, height, prepass); |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ScaleImage -- |
|
|
* |
|
|
* This procedure is invoked to rescale an item. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The item referred to by itemPtr is rescaled so that the |
|
|
* following transformation is applied to all point coordinates: |
|
|
* x' = originX + scaleX*(x-originX) |
|
|
* y' = originY + scaleY*(y-originY) |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
ScaleImage(canvas, itemPtr, originX, originY, scaleX, scaleY) |
|
|
Tk_Canvas canvas; /* Canvas containing rectangle. */ |
|
|
Tk_Item *itemPtr; /* Rectangle to be scaled. */ |
|
|
double originX, originY; /* Origin about which to scale rect. */ |
|
|
double scaleX; /* Amount to scale in X direction. */ |
|
|
double scaleY; /* Amount to scale in Y direction. */ |
|
|
{ |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
|
|
|
|
|
imgPtr->x = originX + scaleX*(imgPtr->x - originX); |
|
|
imgPtr->y = originY + scaleY*(imgPtr->y - originY); |
|
|
ComputeImageBbox(canvas, imgPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* TranslateImage -- |
|
|
* |
|
|
* This procedure is called to move an item by a given amount. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The position of the item is offset by (xDelta, yDelta), and |
|
|
* the bounding box is updated in the generic part of the item |
|
|
* structure. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
TranslateImage(canvas, itemPtr, deltaX, deltaY) |
|
|
Tk_Canvas canvas; /* Canvas containing item. */ |
|
|
Tk_Item *itemPtr; /* Item that is being moved. */ |
|
|
double deltaX, deltaY; /* Amount by which item is to be |
|
|
* moved. */ |
|
|
{ |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
|
|
|
|
|
imgPtr->x += deltaX; |
|
|
imgPtr->y += deltaY; |
|
|
ComputeImageBbox(canvas, imgPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* ImageChangedProc -- |
|
|
* |
|
|
* This procedure is invoked by the image code whenever the manager |
|
|
* for an image does something that affects the image's size or |
|
|
* how it is displayed. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Arranges for the canvas to get redisplayed. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
ImageChangedProc(clientData, x, y, width, height, imgWidth, imgHeight) |
|
|
ClientData clientData; /* Pointer to canvas item for image. */ |
|
|
int x, y; /* Upper left pixel (within image) |
|
|
* that must be redisplayed. */ |
|
|
int width, height; /* Dimensions of area to redisplay |
|
|
* (may be <= 0). */ |
|
|
int imgWidth, imgHeight; /* New dimensions of image. */ |
|
|
{ |
|
|
ImageItem *imgPtr = (ImageItem *) clientData; |
|
|
|
|
|
/* |
|
|
* If the image's size changed and it's not anchored at its |
|
|
* northwest corner then just redisplay the entire area of the |
|
|
* image. This is a bit over-conservative, but we need to do |
|
|
* something because a size change also means a position change. |
|
|
*/ |
|
|
|
|
|
if (((imgPtr->header.x2 - imgPtr->header.x1) != imgWidth) |
|
|
|| ((imgPtr->header.y2 - imgPtr->header.y1) != imgHeight)) { |
|
|
x = y = 0; |
|
|
width = imgWidth; |
|
|
height = imgHeight; |
|
|
Tk_CanvasEventuallyRedraw(imgPtr->canvas, imgPtr->header.x1, |
|
|
imgPtr->header.y1, imgPtr->header.x2, imgPtr->header.y2); |
|
|
} |
|
|
ComputeImageBbox(imgPtr->canvas, imgPtr); |
|
|
Tk_CanvasEventuallyRedraw(imgPtr->canvas, imgPtr->header.x1 + x, |
|
|
imgPtr->header.y1 + y, (int) (imgPtr->header.x1 + x + width), |
|
|
(int) (imgPtr->header.y1 + y + height)); |
|
|
} |
|
|
|
|
|
|
|
|
/* $History: tkCanvImg.c $ |
|
|
* |
|
|
* ***************** Version 1 ***************** |
|
|
* User: Dtashley Date: 1/02/01 Time: 2:36a |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tk Base |
|
|
* Initial check-in. |
|
|
*/ |
|
|
|
|
|
/* End of TKCANVIMG.C */ |
|
| 1 |
|
/* $Header$ */ |
| 2 |
|
|
| 3 |
|
/* |
| 4 |
|
* tkCanvImg.c -- |
| 5 |
|
* |
| 6 |
|
* This file implements image items for canvas widgets. |
| 7 |
|
* |
| 8 |
|
* Copyright (c) 1994 The Regents of the University of California. |
| 9 |
|
* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
| 10 |
|
* |
| 11 |
|
* See the file "license.terms" for information on usage and redistribution |
| 12 |
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 13 |
|
* |
| 14 |
|
* RCS: @(#) $Id: tkcanvimg.c,v 1.1.1.1 2001/06/13 04:56:24 dtashley Exp $ |
| 15 |
|
*/ |
| 16 |
|
|
| 17 |
|
#include <stdio.h> |
| 18 |
|
#include "tkInt.h" |
| 19 |
|
#include "tkPort.h" |
| 20 |
|
#include "tkCanvas.h" |
| 21 |
|
|
| 22 |
|
/* |
| 23 |
|
* The structure below defines the record for each image item. |
| 24 |
|
*/ |
| 25 |
|
|
| 26 |
|
typedef struct ImageItem { |
| 27 |
|
Tk_Item header; /* Generic stuff that's the same for all |
| 28 |
|
* types. MUST BE FIRST IN STRUCTURE. */ |
| 29 |
|
Tk_Canvas canvas; /* Canvas containing the image. */ |
| 30 |
|
double x, y; /* Coordinates of positioning point for |
| 31 |
|
* image. */ |
| 32 |
|
Tk_Anchor anchor; /* Where to anchor image relative to |
| 33 |
|
* (x,y). */ |
| 34 |
|
char *imageString; /* String describing -image option (malloc-ed). |
| 35 |
|
* NULL means no image right now. */ |
| 36 |
|
char *activeImageString; /* String describing -activeimage option. |
| 37 |
|
* NULL means no image right now. */ |
| 38 |
|
char *disabledImageString; /* String describing -disabledimage option. |
| 39 |
|
* NULL means no image right now. */ |
| 40 |
|
Tk_Image image; /* Image to display in window, or NULL if |
| 41 |
|
* no image at present. */ |
| 42 |
|
Tk_Image activeImage; /* Image to display in window, or NULL if |
| 43 |
|
* no image at present. */ |
| 44 |
|
Tk_Image disabledImage; /* Image to display in window, or NULL if |
| 45 |
|
* no image at present. */ |
| 46 |
|
} ImageItem; |
| 47 |
|
|
| 48 |
|
/* |
| 49 |
|
* Information used for parsing configuration specs: |
| 50 |
|
*/ |
| 51 |
|
|
| 52 |
|
static Tk_CustomOption stateOption = { |
| 53 |
|
(Tk_OptionParseProc *) TkStateParseProc, |
| 54 |
|
TkStatePrintProc, (ClientData) 2 |
| 55 |
|
}; |
| 56 |
|
static Tk_CustomOption tagsOption = { |
| 57 |
|
(Tk_OptionParseProc *) Tk_CanvasTagsParseProc, |
| 58 |
|
Tk_CanvasTagsPrintProc, (ClientData) NULL |
| 59 |
|
}; |
| 60 |
|
|
| 61 |
|
static Tk_ConfigSpec configSpecs[] = { |
| 62 |
|
{TK_CONFIG_STRING, "-activeimage", (char *) NULL, (char *) NULL, |
| 63 |
|
(char *) NULL, Tk_Offset(ImageItem, activeImageString), |
| 64 |
|
TK_CONFIG_NULL_OK}, |
| 65 |
|
{TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL, |
| 66 |
|
"center", Tk_Offset(ImageItem, anchor), TK_CONFIG_DONT_SET_DEFAULT}, |
| 67 |
|
{TK_CONFIG_STRING, "-disabledimage", (char *) NULL, (char *) NULL, |
| 68 |
|
(char *) NULL, Tk_Offset(ImageItem, disabledImageString), |
| 69 |
|
TK_CONFIG_NULL_OK}, |
| 70 |
|
{TK_CONFIG_STRING, "-image", (char *) NULL, (char *) NULL, |
| 71 |
|
(char *) NULL, Tk_Offset(ImageItem, imageString), TK_CONFIG_NULL_OK}, |
| 72 |
|
{TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL, |
| 73 |
|
(char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, |
| 74 |
|
&stateOption}, |
| 75 |
|
{TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL, |
| 76 |
|
(char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, |
| 77 |
|
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL, |
| 78 |
|
(char *) NULL, 0, 0} |
| 79 |
|
}; |
| 80 |
|
|
| 81 |
|
/* |
| 82 |
|
* Prototypes for procedures defined in this file: |
| 83 |
|
*/ |
| 84 |
|
|
| 85 |
|
static void ImageChangedProc _ANSI_ARGS_((ClientData clientData, |
| 86 |
|
int x, int y, int width, int height, int imgWidth, |
| 87 |
|
int imgHeight)); |
| 88 |
|
static int ImageCoords _ANSI_ARGS_((Tcl_Interp *interp, |
| 89 |
|
Tk_Canvas canvas, Tk_Item *itemPtr, int argc, |
| 90 |
|
Tcl_Obj *CONST argv[])); |
| 91 |
|
static int ImageToArea _ANSI_ARGS_((Tk_Canvas canvas, |
| 92 |
|
Tk_Item *itemPtr, double *rectPtr)); |
| 93 |
|
static double ImageToPoint _ANSI_ARGS_((Tk_Canvas canvas, |
| 94 |
|
Tk_Item *itemPtr, double *coordPtr)); |
| 95 |
|
static int ImageToPostscript _ANSI_ARGS_((Tcl_Interp *interp, |
| 96 |
|
Tk_Canvas canvas, Tk_Item *itemPtr, int prepass)); |
| 97 |
|
static void ComputeImageBbox _ANSI_ARGS_((Tk_Canvas canvas, |
| 98 |
|
ImageItem *imgPtr)); |
| 99 |
|
static int ConfigureImage _ANSI_ARGS_((Tcl_Interp *interp, |
| 100 |
|
Tk_Canvas canvas, Tk_Item *itemPtr, int argc, |
| 101 |
|
Tcl_Obj *CONST argv[], int flags)); |
| 102 |
|
static int CreateImage _ANSI_ARGS_((Tcl_Interp *interp, |
| 103 |
|
Tk_Canvas canvas, struct Tk_Item *itemPtr, |
| 104 |
|
int argc, Tcl_Obj *CONST argv[])); |
| 105 |
|
static void DeleteImage _ANSI_ARGS_((Tk_Canvas canvas, |
| 106 |
|
Tk_Item *itemPtr, Display *display)); |
| 107 |
|
static void DisplayImage _ANSI_ARGS_((Tk_Canvas canvas, |
| 108 |
|
Tk_Item *itemPtr, Display *display, Drawable dst, |
| 109 |
|
int x, int y, int width, int height)); |
| 110 |
|
static void ScaleImage _ANSI_ARGS_((Tk_Canvas canvas, |
| 111 |
|
Tk_Item *itemPtr, double originX, double originY, |
| 112 |
|
double scaleX, double scaleY)); |
| 113 |
|
static void TranslateImage _ANSI_ARGS_((Tk_Canvas canvas, |
| 114 |
|
Tk_Item *itemPtr, double deltaX, double deltaY)); |
| 115 |
|
|
| 116 |
|
/* |
| 117 |
|
* The structures below defines the image item type in terms of |
| 118 |
|
* procedures that can be invoked by generic item code. |
| 119 |
|
*/ |
| 120 |
|
|
| 121 |
|
Tk_ItemType tkImageType = { |
| 122 |
|
"image", /* name */ |
| 123 |
|
sizeof(ImageItem), /* itemSize */ |
| 124 |
|
CreateImage, /* createProc */ |
| 125 |
|
configSpecs, /* configSpecs */ |
| 126 |
|
ConfigureImage, /* configureProc */ |
| 127 |
|
ImageCoords, /* coordProc */ |
| 128 |
|
DeleteImage, /* deleteProc */ |
| 129 |
|
DisplayImage, /* displayProc */ |
| 130 |
|
TK_CONFIG_OBJS, /* flags */ |
| 131 |
|
ImageToPoint, /* pointProc */ |
| 132 |
|
ImageToArea, /* areaProc */ |
| 133 |
|
ImageToPostscript, /* postscriptProc */ |
| 134 |
|
ScaleImage, /* scaleProc */ |
| 135 |
|
TranslateImage, /* translateProc */ |
| 136 |
|
(Tk_ItemIndexProc *) NULL, /* indexProc */ |
| 137 |
|
(Tk_ItemCursorProc *) NULL, /* icursorProc */ |
| 138 |
|
(Tk_ItemSelectionProc *) NULL, /* selectionProc */ |
| 139 |
|
(Tk_ItemInsertProc *) NULL, /* insertProc */ |
| 140 |
|
(Tk_ItemDCharsProc *) NULL, /* dTextProc */ |
| 141 |
|
(Tk_ItemType *) NULL, /* nextPtr */ |
| 142 |
|
}; |
| 143 |
|
|
| 144 |
|
/* |
| 145 |
|
*-------------------------------------------------------------- |
| 146 |
|
* |
| 147 |
|
* CreateImage -- |
| 148 |
|
* |
| 149 |
|
* This procedure is invoked to create a new image |
| 150 |
|
* item in a canvas. |
| 151 |
|
* |
| 152 |
|
* Results: |
| 153 |
|
* A standard Tcl return value. If an error occurred in |
| 154 |
|
* creating the item, then an error message is left in |
| 155 |
|
* the interp's result; in this case itemPtr is left uninitialized, |
| 156 |
|
* so it can be safely freed by the caller. |
| 157 |
|
* |
| 158 |
|
* Side effects: |
| 159 |
|
* A new image item is created. |
| 160 |
|
* |
| 161 |
|
*-------------------------------------------------------------- |
| 162 |
|
*/ |
| 163 |
|
|
| 164 |
|
static int |
| 165 |
|
CreateImage(interp, canvas, itemPtr, argc, argv) |
| 166 |
|
Tcl_Interp *interp; /* Interpreter for error reporting. */ |
| 167 |
|
Tk_Canvas canvas; /* Canvas to hold new item. */ |
| 168 |
|
Tk_Item *itemPtr; /* Record to hold new item; header |
| 169 |
|
* has been initialized by caller. */ |
| 170 |
|
int argc; /* Number of arguments in argv. */ |
| 171 |
|
Tcl_Obj *CONST argv[]; /* Arguments describing rectangle. */ |
| 172 |
|
{ |
| 173 |
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
| 174 |
|
int i; |
| 175 |
|
|
| 176 |
|
if (argc==1) { |
| 177 |
|
i = 1; |
| 178 |
|
} else { |
| 179 |
|
char *arg = Tcl_GetStringFromObj((Tcl_Obj *) argv[1], NULL); |
| 180 |
|
if (((argc>1) && (arg[0] == '-') |
| 181 |
|
&& (arg[1] >= 'a') && (arg[1] <= 'z'))) { |
| 182 |
|
i = 1; |
| 183 |
|
} else { |
| 184 |
|
i = 2; |
| 185 |
|
} |
| 186 |
|
} |
| 187 |
|
|
| 188 |
|
if (argc < i) { |
| 189 |
|
Tcl_AppendResult(interp, "wrong # args: should be \"", |
| 190 |
|
Tk_PathName(Tk_CanvasTkwin(canvas)), " create ", |
| 191 |
|
itemPtr->typePtr->name, " x y ?options?\"", |
| 192 |
|
(char *) NULL); |
| 193 |
|
return TCL_ERROR; |
| 194 |
|
} |
| 195 |
|
|
| 196 |
|
/* |
| 197 |
|
* Initialize item's record. |
| 198 |
|
*/ |
| 199 |
|
|
| 200 |
|
imgPtr->canvas = canvas; |
| 201 |
|
imgPtr->anchor = TK_ANCHOR_CENTER; |
| 202 |
|
imgPtr->imageString = NULL; |
| 203 |
|
imgPtr->activeImageString = NULL; |
| 204 |
|
imgPtr->disabledImageString = NULL; |
| 205 |
|
imgPtr->image = NULL; |
| 206 |
|
imgPtr->activeImage = NULL; |
| 207 |
|
imgPtr->disabledImage = NULL; |
| 208 |
|
|
| 209 |
|
/* |
| 210 |
|
* Process the arguments to fill in the item record. |
| 211 |
|
*/ |
| 212 |
|
|
| 213 |
|
if ((ImageCoords(interp, canvas, itemPtr, i, argv) != TCL_OK)) { |
| 214 |
|
goto error; |
| 215 |
|
} |
| 216 |
|
if (ConfigureImage(interp, canvas, itemPtr, argc-i, argv+i, 0) == TCL_OK) { |
| 217 |
|
return TCL_OK; |
| 218 |
|
} |
| 219 |
|
|
| 220 |
|
error: |
| 221 |
|
DeleteImage(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas))); |
| 222 |
|
return TCL_ERROR; |
| 223 |
|
} |
| 224 |
|
|
| 225 |
|
/* |
| 226 |
|
*-------------------------------------------------------------- |
| 227 |
|
* |
| 228 |
|
* ImageCoords -- |
| 229 |
|
* |
| 230 |
|
* This procedure is invoked to process the "coords" widget |
| 231 |
|
* command on image items. See the user documentation for |
| 232 |
|
* details on what it does. |
| 233 |
|
* |
| 234 |
|
* Results: |
| 235 |
|
* Returns TCL_OK or TCL_ERROR, and sets the interp's result. |
| 236 |
|
* |
| 237 |
|
* Side effects: |
| 238 |
|
* The coordinates for the given item may be changed. |
| 239 |
|
* |
| 240 |
|
*-------------------------------------------------------------- |
| 241 |
|
*/ |
| 242 |
|
|
| 243 |
|
static int |
| 244 |
|
ImageCoords(interp, canvas, itemPtr, argc, argv) |
| 245 |
|
Tcl_Interp *interp; /* Used for error reporting. */ |
| 246 |
|
Tk_Canvas canvas; /* Canvas containing item. */ |
| 247 |
|
Tk_Item *itemPtr; /* Item whose coordinates are to be |
| 248 |
|
* read or modified. */ |
| 249 |
|
int argc; /* Number of coordinates supplied in |
| 250 |
|
* argv. */ |
| 251 |
|
Tcl_Obj *CONST argv[]; /* Array of coordinates: x1, y1, |
| 252 |
|
* x2, y2, ... */ |
| 253 |
|
{ |
| 254 |
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
| 255 |
|
|
| 256 |
|
if (argc == 0) { |
| 257 |
|
Tcl_Obj *obj = Tcl_NewObj(); |
| 258 |
|
Tcl_Obj *subobj = Tcl_NewDoubleObj(imgPtr->x); |
| 259 |
|
Tcl_ListObjAppendElement(interp, obj, subobj); |
| 260 |
|
subobj = Tcl_NewDoubleObj(imgPtr->y); |
| 261 |
|
Tcl_ListObjAppendElement(interp, obj, subobj); |
| 262 |
|
Tcl_SetObjResult(interp, obj); |
| 263 |
|
} else if (argc < 3) { |
| 264 |
|
if (argc==1) { |
| 265 |
|
if (Tcl_ListObjGetElements(interp, argv[0], &argc, |
| 266 |
|
(Tcl_Obj ***) &argv) != TCL_OK) { |
| 267 |
|
return TCL_ERROR; |
| 268 |
|
} else if (argc != 2) { |
| 269 |
|
char buf[64]; |
| 270 |
|
|
| 271 |
|
sprintf(buf, "wrong # coordinates: expected 2, got %d", argc); |
| 272 |
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
| 273 |
|
return TCL_ERROR; |
| 274 |
|
} |
| 275 |
|
} |
| 276 |
|
if ((Tk_CanvasGetCoordFromObj(interp, canvas, argv[0], &imgPtr->x) != TCL_OK) |
| 277 |
|
|| (Tk_CanvasGetCoordFromObj(interp, canvas, argv[1], |
| 278 |
|
&imgPtr->y) != TCL_OK)) { |
| 279 |
|
return TCL_ERROR; |
| 280 |
|
} |
| 281 |
|
ComputeImageBbox(canvas, imgPtr); |
| 282 |
|
} else { |
| 283 |
|
char buf[64]; |
| 284 |
|
|
| 285 |
|
sprintf(buf, "wrong # coordinates: expected 0 or 2, got %d", argc); |
| 286 |
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
| 287 |
|
return TCL_ERROR; |
| 288 |
|
} |
| 289 |
|
return TCL_OK; |
| 290 |
|
} |
| 291 |
|
|
| 292 |
|
/* |
| 293 |
|
*-------------------------------------------------------------- |
| 294 |
|
* |
| 295 |
|
* ConfigureImage -- |
| 296 |
|
* |
| 297 |
|
* This procedure is invoked to configure various aspects |
| 298 |
|
* of an image item, such as its anchor position. |
| 299 |
|
* |
| 300 |
|
* Results: |
| 301 |
|
* A standard Tcl result code. If an error occurs, then |
| 302 |
|
* an error message is left in the interp's result. |
| 303 |
|
* |
| 304 |
|
* Side effects: |
| 305 |
|
* Configuration information may be set for itemPtr. |
| 306 |
|
* |
| 307 |
|
*-------------------------------------------------------------- |
| 308 |
|
*/ |
| 309 |
|
|
| 310 |
|
static int |
| 311 |
|
ConfigureImage(interp, canvas, itemPtr, argc, argv, flags) |
| 312 |
|
Tcl_Interp *interp; /* Used for error reporting. */ |
| 313 |
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
| 314 |
|
Tk_Item *itemPtr; /* Image item to reconfigure. */ |
| 315 |
|
int argc; /* Number of elements in argv. */ |
| 316 |
|
Tcl_Obj *CONST argv[]; /* Arguments describing things to configure. */ |
| 317 |
|
int flags; /* Flags to pass to Tk_ConfigureWidget. */ |
| 318 |
|
{ |
| 319 |
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
| 320 |
|
Tk_Window tkwin; |
| 321 |
|
Tk_Image image; |
| 322 |
|
|
| 323 |
|
tkwin = Tk_CanvasTkwin(canvas); |
| 324 |
|
if (Tk_ConfigureWidget(interp, tkwin, configSpecs, argc, (char **) argv, |
| 325 |
|
(char *) imgPtr, flags|TK_CONFIG_OBJS) != TCL_OK) { |
| 326 |
|
return TCL_ERROR; |
| 327 |
|
} |
| 328 |
|
|
| 329 |
|
/* |
| 330 |
|
* Create the image. Save the old image around and don't free it |
| 331 |
|
* until after the new one is allocated. This keeps the reference |
| 332 |
|
* count from going to zero so the image doesn't have to be recreated |
| 333 |
|
* if it hasn't changed. |
| 334 |
|
*/ |
| 335 |
|
|
| 336 |
|
if (imgPtr->activeImageString != NULL) { |
| 337 |
|
itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT; |
| 338 |
|
} else { |
| 339 |
|
itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT; |
| 340 |
|
} |
| 341 |
|
if (imgPtr->imageString != NULL) { |
| 342 |
|
image = Tk_GetImage(interp, tkwin, imgPtr->imageString, |
| 343 |
|
ImageChangedProc, (ClientData) imgPtr); |
| 344 |
|
if (image == NULL) { |
| 345 |
|
return TCL_ERROR; |
| 346 |
|
} |
| 347 |
|
} else { |
| 348 |
|
image = NULL; |
| 349 |
|
} |
| 350 |
|
if (imgPtr->image != NULL) { |
| 351 |
|
Tk_FreeImage(imgPtr->image); |
| 352 |
|
} |
| 353 |
|
imgPtr->image = image; |
| 354 |
|
if (imgPtr->activeImageString != NULL) { |
| 355 |
|
image = Tk_GetImage(interp, tkwin, imgPtr->activeImageString, |
| 356 |
|
ImageChangedProc, (ClientData) imgPtr); |
| 357 |
|
if (image == NULL) { |
| 358 |
|
return TCL_ERROR; |
| 359 |
|
} |
| 360 |
|
} else { |
| 361 |
|
image = NULL; |
| 362 |
|
} |
| 363 |
|
if (imgPtr->activeImage != NULL) { |
| 364 |
|
Tk_FreeImage(imgPtr->activeImage); |
| 365 |
|
} |
| 366 |
|
imgPtr->activeImage = image; |
| 367 |
|
if (imgPtr->disabledImageString != NULL) { |
| 368 |
|
image = Tk_GetImage(interp, tkwin, imgPtr->disabledImageString, |
| 369 |
|
ImageChangedProc, (ClientData) imgPtr); |
| 370 |
|
if (image == NULL) { |
| 371 |
|
return TCL_ERROR; |
| 372 |
|
} |
| 373 |
|
} else { |
| 374 |
|
image = NULL; |
| 375 |
|
} |
| 376 |
|
if (imgPtr->disabledImage != NULL) { |
| 377 |
|
Tk_FreeImage(imgPtr->disabledImage); |
| 378 |
|
} |
| 379 |
|
imgPtr->disabledImage = image; |
| 380 |
|
ComputeImageBbox(canvas, imgPtr); |
| 381 |
|
return TCL_OK; |
| 382 |
|
} |
| 383 |
|
|
| 384 |
|
/* |
| 385 |
|
*-------------------------------------------------------------- |
| 386 |
|
* |
| 387 |
|
* DeleteImage -- |
| 388 |
|
* |
| 389 |
|
* This procedure is called to clean up the data structure |
| 390 |
|
* associated with a image item. |
| 391 |
|
* |
| 392 |
|
* Results: |
| 393 |
|
* None. |
| 394 |
|
* |
| 395 |
|
* Side effects: |
| 396 |
|
* Resources associated with itemPtr are released. |
| 397 |
|
* |
| 398 |
|
*-------------------------------------------------------------- |
| 399 |
|
*/ |
| 400 |
|
|
| 401 |
|
static void |
| 402 |
|
DeleteImage(canvas, itemPtr, display) |
| 403 |
|
Tk_Canvas canvas; /* Info about overall canvas widget. */ |
| 404 |
|
Tk_Item *itemPtr; /* Item that is being deleted. */ |
| 405 |
|
Display *display; /* Display containing window for |
| 406 |
|
* canvas. */ |
| 407 |
|
{ |
| 408 |
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
| 409 |
|
|
| 410 |
|
if (imgPtr->imageString != NULL) { |
| 411 |
|
ckfree(imgPtr->imageString); |
| 412 |
|
} |
| 413 |
|
if (imgPtr->activeImageString != NULL) { |
| 414 |
|
ckfree(imgPtr->activeImageString); |
| 415 |
|
} |
| 416 |
|
if (imgPtr->disabledImageString != NULL) { |
| 417 |
|
ckfree(imgPtr->disabledImageString); |
| 418 |
|
} |
| 419 |
|
if (imgPtr->image != NULL) { |
| 420 |
|
Tk_FreeImage(imgPtr->image); |
| 421 |
|
} |
| 422 |
|
if (imgPtr->activeImage != NULL) { |
| 423 |
|
Tk_FreeImage(imgPtr->activeImage); |
| 424 |
|
} |
| 425 |
|
if (imgPtr->disabledImage != NULL) { |
| 426 |
|
Tk_FreeImage(imgPtr->disabledImage); |
| 427 |
|
} |
| 428 |
|
} |
| 429 |
|
|
| 430 |
|
/* |
| 431 |
|
*-------------------------------------------------------------- |
| 432 |
|
* |
| 433 |
|
* ComputeImageBbox -- |
| 434 |
|
* |
| 435 |
|
* This procedure is invoked to compute the bounding box of |
| 436 |
|
* all the pixels that may be drawn as part of a image item. |
| 437 |
|
* This procedure is where the child image's placement is |
| 438 |
|
* computed. |
| 439 |
|
* |
| 440 |
|
* Results: |
| 441 |
|
* None. |
| 442 |
|
* |
| 443 |
|
* Side effects: |
| 444 |
|
* The fields x1, y1, x2, and y2 are updated in the header |
| 445 |
|
* for itemPtr. |
| 446 |
|
* |
| 447 |
|
*-------------------------------------------------------------- |
| 448 |
|
*/ |
| 449 |
|
|
| 450 |
|
/* ARGSUSED */ |
| 451 |
|
static void |
| 452 |
|
ComputeImageBbox(canvas, imgPtr) |
| 453 |
|
Tk_Canvas canvas; /* Canvas that contains item. */ |
| 454 |
|
ImageItem *imgPtr; /* Item whose bbox is to be |
| 455 |
|
* recomputed. */ |
| 456 |
|
{ |
| 457 |
|
int width, height; |
| 458 |
|
int x, y; |
| 459 |
|
Tk_Image image; |
| 460 |
|
Tk_State state = imgPtr->header.state; |
| 461 |
|
|
| 462 |
|
if(state == TK_STATE_NULL) { |
| 463 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 464 |
|
} |
| 465 |
|
image = imgPtr->image; |
| 466 |
|
if (((TkCanvas *)canvas)->currentItemPtr == (Tk_Item *)imgPtr) { |
| 467 |
|
if (imgPtr->activeImage != NULL) { |
| 468 |
|
image = imgPtr->activeImage; |
| 469 |
|
} |
| 470 |
|
} else if (state == TK_STATE_DISABLED) { |
| 471 |
|
if (imgPtr->disabledImage != NULL) { |
| 472 |
|
image = imgPtr->disabledImage; |
| 473 |
|
} |
| 474 |
|
} |
| 475 |
|
|
| 476 |
|
x = (int) (imgPtr->x + ((imgPtr->x >= 0) ? 0.5 : - 0.5)); |
| 477 |
|
y = (int) (imgPtr->y + ((imgPtr->y >= 0) ? 0.5 : - 0.5)); |
| 478 |
|
|
| 479 |
|
if ((state == TK_STATE_HIDDEN) || (image == None)) { |
| 480 |
|
imgPtr->header.x1 = imgPtr->header.x2 = x; |
| 481 |
|
imgPtr->header.y1 = imgPtr->header.y2 = y; |
| 482 |
|
return; |
| 483 |
|
} |
| 484 |
|
|
| 485 |
|
/* |
| 486 |
|
* Compute location and size of image, using anchor information. |
| 487 |
|
*/ |
| 488 |
|
|
| 489 |
|
Tk_SizeOfImage(image, &width, &height); |
| 490 |
|
switch (imgPtr->anchor) { |
| 491 |
|
case TK_ANCHOR_N: |
| 492 |
|
x -= width/2; |
| 493 |
|
break; |
| 494 |
|
case TK_ANCHOR_NE: |
| 495 |
|
x -= width; |
| 496 |
|
break; |
| 497 |
|
case TK_ANCHOR_E: |
| 498 |
|
x -= width; |
| 499 |
|
y -= height/2; |
| 500 |
|
break; |
| 501 |
|
case TK_ANCHOR_SE: |
| 502 |
|
x -= width; |
| 503 |
|
y -= height; |
| 504 |
|
break; |
| 505 |
|
case TK_ANCHOR_S: |
| 506 |
|
x -= width/2; |
| 507 |
|
y -= height; |
| 508 |
|
break; |
| 509 |
|
case TK_ANCHOR_SW: |
| 510 |
|
y -= height; |
| 511 |
|
break; |
| 512 |
|
case TK_ANCHOR_W: |
| 513 |
|
y -= height/2; |
| 514 |
|
break; |
| 515 |
|
case TK_ANCHOR_NW: |
| 516 |
|
break; |
| 517 |
|
case TK_ANCHOR_CENTER: |
| 518 |
|
x -= width/2; |
| 519 |
|
y -= height/2; |
| 520 |
|
break; |
| 521 |
|
} |
| 522 |
|
|
| 523 |
|
/* |
| 524 |
|
* Store the information in the item header. |
| 525 |
|
*/ |
| 526 |
|
|
| 527 |
|
imgPtr->header.x1 = x; |
| 528 |
|
imgPtr->header.y1 = y; |
| 529 |
|
imgPtr->header.x2 = x + width; |
| 530 |
|
imgPtr->header.y2 = y + height; |
| 531 |
|
} |
| 532 |
|
|
| 533 |
|
/* |
| 534 |
|
*-------------------------------------------------------------- |
| 535 |
|
* |
| 536 |
|
* DisplayImage -- |
| 537 |
|
* |
| 538 |
|
* This procedure is invoked to draw a image item in a given |
| 539 |
|
* drawable. |
| 540 |
|
* |
| 541 |
|
* Results: |
| 542 |
|
* None. |
| 543 |
|
* |
| 544 |
|
* Side effects: |
| 545 |
|
* ItemPtr is drawn in drawable using the transformation |
| 546 |
|
* information in canvas. |
| 547 |
|
* |
| 548 |
|
*-------------------------------------------------------------- |
| 549 |
|
*/ |
| 550 |
|
|
| 551 |
|
static void |
| 552 |
|
DisplayImage(canvas, itemPtr, display, drawable, x, y, width, height) |
| 553 |
|
Tk_Canvas canvas; /* Canvas that contains item. */ |
| 554 |
|
Tk_Item *itemPtr; /* Item to be displayed. */ |
| 555 |
|
Display *display; /* Display on which to draw item. */ |
| 556 |
|
Drawable drawable; /* Pixmap or window in which to draw |
| 557 |
|
* item. */ |
| 558 |
|
int x, y, width, height; /* Describes region of canvas that |
| 559 |
|
* must be redisplayed (not used). */ |
| 560 |
|
{ |
| 561 |
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
| 562 |
|
short drawableX, drawableY; |
| 563 |
|
Tk_Image image; |
| 564 |
|
Tk_State state = itemPtr->state; |
| 565 |
|
|
| 566 |
|
if(state == TK_STATE_NULL) { |
| 567 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 568 |
|
} |
| 569 |
|
|
| 570 |
|
image = imgPtr->image; |
| 571 |
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
| 572 |
|
if (imgPtr->activeImage != NULL) { |
| 573 |
|
image = imgPtr->activeImage; |
| 574 |
|
} |
| 575 |
|
} else if (state == TK_STATE_DISABLED) { |
| 576 |
|
if (imgPtr->disabledImage != NULL) { |
| 577 |
|
image = imgPtr->disabledImage; |
| 578 |
|
} |
| 579 |
|
} |
| 580 |
|
|
| 581 |
|
if (image == NULL) { |
| 582 |
|
return; |
| 583 |
|
} |
| 584 |
|
|
| 585 |
|
/* |
| 586 |
|
* Translate the coordinates to those of the image, then redisplay it. |
| 587 |
|
*/ |
| 588 |
|
|
| 589 |
|
Tk_CanvasDrawableCoords(canvas, (double) x, (double) y, |
| 590 |
|
&drawableX, &drawableY); |
| 591 |
|
Tk_RedrawImage(image, x - imgPtr->header.x1, y - imgPtr->header.y1, |
| 592 |
|
width, height, drawable, drawableX, drawableY); |
| 593 |
|
} |
| 594 |
|
|
| 595 |
|
/* |
| 596 |
|
*-------------------------------------------------------------- |
| 597 |
|
* |
| 598 |
|
* ImageToPoint -- |
| 599 |
|
* |
| 600 |
|
* Computes the distance from a given point to a given |
| 601 |
|
* rectangle, in canvas units. |
| 602 |
|
* |
| 603 |
|
* Results: |
| 604 |
|
* The return value is 0 if the point whose x and y coordinates |
| 605 |
|
* are coordPtr[0] and coordPtr[1] is inside the image. If the |
| 606 |
|
* point isn't inside the image then the return value is the |
| 607 |
|
* distance from the point to the image. |
| 608 |
|
* |
| 609 |
|
* Side effects: |
| 610 |
|
* None. |
| 611 |
|
* |
| 612 |
|
*-------------------------------------------------------------- |
| 613 |
|
*/ |
| 614 |
|
|
| 615 |
|
static double |
| 616 |
|
ImageToPoint(canvas, itemPtr, coordPtr) |
| 617 |
|
Tk_Canvas canvas; /* Canvas containing item. */ |
| 618 |
|
Tk_Item *itemPtr; /* Item to check against point. */ |
| 619 |
|
double *coordPtr; /* Pointer to x and y coordinates. */ |
| 620 |
|
{ |
| 621 |
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
| 622 |
|
double x1, x2, y1, y2, xDiff, yDiff; |
| 623 |
|
|
| 624 |
|
x1 = imgPtr->header.x1; |
| 625 |
|
y1 = imgPtr->header.y1; |
| 626 |
|
x2 = imgPtr->header.x2; |
| 627 |
|
y2 = imgPtr->header.y2; |
| 628 |
|
|
| 629 |
|
/* |
| 630 |
|
* Point is outside rectangle. |
| 631 |
|
*/ |
| 632 |
|
|
| 633 |
|
if (coordPtr[0] < x1) { |
| 634 |
|
xDiff = x1 - coordPtr[0]; |
| 635 |
|
} else if (coordPtr[0] > x2) { |
| 636 |
|
xDiff = coordPtr[0] - x2; |
| 637 |
|
} else { |
| 638 |
|
xDiff = 0; |
| 639 |
|
} |
| 640 |
|
|
| 641 |
|
if (coordPtr[1] < y1) { |
| 642 |
|
yDiff = y1 - coordPtr[1]; |
| 643 |
|
} else if (coordPtr[1] > y2) { |
| 644 |
|
yDiff = coordPtr[1] - y2; |
| 645 |
|
} else { |
| 646 |
|
yDiff = 0; |
| 647 |
|
} |
| 648 |
|
|
| 649 |
|
return hypot(xDiff, yDiff); |
| 650 |
|
} |
| 651 |
|
|
| 652 |
|
/* |
| 653 |
|
*-------------------------------------------------------------- |
| 654 |
|
* |
| 655 |
|
* ImageToArea -- |
| 656 |
|
* |
| 657 |
|
* This procedure is called to determine whether an item |
| 658 |
|
* lies entirely inside, entirely outside, or overlapping |
| 659 |
|
* a given rectangle. |
| 660 |
|
* |
| 661 |
|
* Results: |
| 662 |
|
* -1 is returned if the item is entirely outside the area |
| 663 |
|
* given by rectPtr, 0 if it overlaps, and 1 if it is entirely |
| 664 |
|
* inside the given area. |
| 665 |
|
* |
| 666 |
|
* Side effects: |
| 667 |
|
* None. |
| 668 |
|
* |
| 669 |
|
*-------------------------------------------------------------- |
| 670 |
|
*/ |
| 671 |
|
|
| 672 |
|
static int |
| 673 |
|
ImageToArea(canvas, itemPtr, rectPtr) |
| 674 |
|
Tk_Canvas canvas; /* Canvas containing item. */ |
| 675 |
|
Tk_Item *itemPtr; /* Item to check against rectangle. */ |
| 676 |
|
double *rectPtr; /* Pointer to array of four coordinates |
| 677 |
|
* (x1, y1, x2, y2) describing rectangular |
| 678 |
|
* area. */ |
| 679 |
|
{ |
| 680 |
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
| 681 |
|
|
| 682 |
|
if ((rectPtr[2] <= imgPtr->header.x1) |
| 683 |
|
|| (rectPtr[0] >= imgPtr->header.x2) |
| 684 |
|
|| (rectPtr[3] <= imgPtr->header.y1) |
| 685 |
|
|| (rectPtr[1] >= imgPtr->header.y2)) { |
| 686 |
|
return -1; |
| 687 |
|
} |
| 688 |
|
if ((rectPtr[0] <= imgPtr->header.x1) |
| 689 |
|
&& (rectPtr[1] <= imgPtr->header.y1) |
| 690 |
|
&& (rectPtr[2] >= imgPtr->header.x2) |
| 691 |
|
&& (rectPtr[3] >= imgPtr->header.y2)) { |
| 692 |
|
return 1; |
| 693 |
|
} |
| 694 |
|
return 0; |
| 695 |
|
} |
| 696 |
|
|
| 697 |
|
/* |
| 698 |
|
*-------------------------------------------------------------- |
| 699 |
|
* |
| 700 |
|
* ImageToPostscript -- |
| 701 |
|
* |
| 702 |
|
* This procedure is called to generate Postscript for |
| 703 |
|
* image items. |
| 704 |
|
* |
| 705 |
|
* Results: |
| 706 |
|
* The return value is a standard Tcl result. If an error |
| 707 |
|
* occurs in generating Postscript then an error message is |
| 708 |
|
* left in interp->result, replacing whatever used to be there. |
| 709 |
|
* If no error occurs, then Postscript for the item is appended |
| 710 |
|
* to the result. |
| 711 |
|
* |
| 712 |
|
* Side effects: |
| 713 |
|
* None. |
| 714 |
|
* |
| 715 |
|
*-------------------------------------------------------------- |
| 716 |
|
*/ |
| 717 |
|
|
| 718 |
|
static int |
| 719 |
|
ImageToPostscript(interp, canvas, itemPtr, prepass) |
| 720 |
|
Tcl_Interp *interp; /* Leave Postscript or error message |
| 721 |
|
* here. */ |
| 722 |
|
Tk_Canvas canvas; /* Information about overall canvas. */ |
| 723 |
|
Tk_Item *itemPtr; /* Item for which Postscript is |
| 724 |
|
* wanted. */ |
| 725 |
|
int prepass; /* 1 means this is a prepass to |
| 726 |
|
* collect font information; 0 means |
| 727 |
|
* final Postscript is being created.*/ |
| 728 |
|
{ |
| 729 |
|
ImageItem *imgPtr = (ImageItem *)itemPtr; |
| 730 |
|
Tk_Window canvasWin = Tk_CanvasTkwin(canvas); |
| 731 |
|
|
| 732 |
|
char buffer[256]; |
| 733 |
|
double x, y; |
| 734 |
|
int width, height; |
| 735 |
|
Tk_Image image; |
| 736 |
|
Tk_State state = itemPtr->state; |
| 737 |
|
|
| 738 |
|
if(state == TK_STATE_NULL) { |
| 739 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 740 |
|
} |
| 741 |
|
|
| 742 |
|
image = imgPtr->image; |
| 743 |
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
| 744 |
|
if (imgPtr->activeImage != NULL) { |
| 745 |
|
image = imgPtr->activeImage; |
| 746 |
|
} |
| 747 |
|
} else if (state == TK_STATE_DISABLED) { |
| 748 |
|
if (imgPtr->disabledImage != NULL) { |
| 749 |
|
image = imgPtr->disabledImage; |
| 750 |
|
} |
| 751 |
|
} |
| 752 |
|
Tk_SizeOfImage(image, &width, &height); |
| 753 |
|
|
| 754 |
|
/* |
| 755 |
|
* Compute the coordinates of the lower-left corner of the image, |
| 756 |
|
* taking into account the anchor position for the image. |
| 757 |
|
*/ |
| 758 |
|
|
| 759 |
|
x = imgPtr->x; |
| 760 |
|
y = Tk_CanvasPsY(canvas, imgPtr->y); |
| 761 |
|
|
| 762 |
|
switch (imgPtr->anchor) { |
| 763 |
|
case TK_ANCHOR_NW: y -= height; break; |
| 764 |
|
case TK_ANCHOR_N: x -= width/2.0; y -= height; break; |
| 765 |
|
case TK_ANCHOR_NE: x -= width; y -= height; break; |
| 766 |
|
case TK_ANCHOR_E: x -= width; y -= height/2.0; break; |
| 767 |
|
case TK_ANCHOR_SE: x -= width; break; |
| 768 |
|
case TK_ANCHOR_S: x -= width/2.0; break; |
| 769 |
|
case TK_ANCHOR_SW: break; |
| 770 |
|
case TK_ANCHOR_W: y -= height/2.0; break; |
| 771 |
|
case TK_ANCHOR_CENTER: x -= width/2.0; y -= height/2.0; break; |
| 772 |
|
} |
| 773 |
|
|
| 774 |
|
if (image == NULL) { |
| 775 |
|
return TCL_OK; |
| 776 |
|
} |
| 777 |
|
|
| 778 |
|
if (!prepass) { |
| 779 |
|
sprintf(buffer, "%.15g %.15g", x, y); |
| 780 |
|
Tcl_AppendResult(interp, buffer, " translate\n", (char *) NULL); |
| 781 |
|
} |
| 782 |
|
|
| 783 |
|
return Tk_PostscriptImage(image, interp, canvasWin, |
| 784 |
|
((TkCanvas *) canvas)->psInfo, 0, 0, width, height, prepass); |
| 785 |
|
} |
| 786 |
|
|
| 787 |
|
/* |
| 788 |
|
*-------------------------------------------------------------- |
| 789 |
|
* |
| 790 |
|
* ScaleImage -- |
| 791 |
|
* |
| 792 |
|
* This procedure is invoked to rescale an item. |
| 793 |
|
* |
| 794 |
|
* Results: |
| 795 |
|
* None. |
| 796 |
|
* |
| 797 |
|
* Side effects: |
| 798 |
|
* The item referred to by itemPtr is rescaled so that the |
| 799 |
|
* following transformation is applied to all point coordinates: |
| 800 |
|
* x' = originX + scaleX*(x-originX) |
| 801 |
|
* y' = originY + scaleY*(y-originY) |
| 802 |
|
* |
| 803 |
|
*-------------------------------------------------------------- |
| 804 |
|
*/ |
| 805 |
|
|
| 806 |
|
static void |
| 807 |
|
ScaleImage(canvas, itemPtr, originX, originY, scaleX, scaleY) |
| 808 |
|
Tk_Canvas canvas; /* Canvas containing rectangle. */ |
| 809 |
|
Tk_Item *itemPtr; /* Rectangle to be scaled. */ |
| 810 |
|
double originX, originY; /* Origin about which to scale rect. */ |
| 811 |
|
double scaleX; /* Amount to scale in X direction. */ |
| 812 |
|
double scaleY; /* Amount to scale in Y direction. */ |
| 813 |
|
{ |
| 814 |
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
| 815 |
|
|
| 816 |
|
imgPtr->x = originX + scaleX*(imgPtr->x - originX); |
| 817 |
|
imgPtr->y = originY + scaleY*(imgPtr->y - originY); |
| 818 |
|
ComputeImageBbox(canvas, imgPtr); |
| 819 |
|
} |
| 820 |
|
|
| 821 |
|
/* |
| 822 |
|
*-------------------------------------------------------------- |
| 823 |
|
* |
| 824 |
|
* TranslateImage -- |
| 825 |
|
* |
| 826 |
|
* This procedure is called to move an item by a given amount. |
| 827 |
|
* |
| 828 |
|
* Results: |
| 829 |
|
* None. |
| 830 |
|
* |
| 831 |
|
* Side effects: |
| 832 |
|
* The position of the item is offset by (xDelta, yDelta), and |
| 833 |
|
* the bounding box is updated in the generic part of the item |
| 834 |
|
* structure. |
| 835 |
|
* |
| 836 |
|
*-------------------------------------------------------------- |
| 837 |
|
*/ |
| 838 |
|
|
| 839 |
|
static void |
| 840 |
|
TranslateImage(canvas, itemPtr, deltaX, deltaY) |
| 841 |
|
Tk_Canvas canvas; /* Canvas containing item. */ |
| 842 |
|
Tk_Item *itemPtr; /* Item that is being moved. */ |
| 843 |
|
double deltaX, deltaY; /* Amount by which item is to be |
| 844 |
|
* moved. */ |
| 845 |
|
{ |
| 846 |
|
ImageItem *imgPtr = (ImageItem *) itemPtr; |
| 847 |
|
|
| 848 |
|
imgPtr->x += deltaX; |
| 849 |
|
imgPtr->y += deltaY; |
| 850 |
|
ComputeImageBbox(canvas, imgPtr); |
| 851 |
|
} |
| 852 |
|
|
| 853 |
|
/* |
| 854 |
|
*---------------------------------------------------------------------- |
| 855 |
|
* |
| 856 |
|
* ImageChangedProc -- |
| 857 |
|
* |
| 858 |
|
* This procedure is invoked by the image code whenever the manager |
| 859 |
|
* for an image does something that affects the image's size or |
| 860 |
|
* how it is displayed. |
| 861 |
|
* |
| 862 |
|
* Results: |
| 863 |
|
* None. |
| 864 |
|
* |
| 865 |
|
* Side effects: |
| 866 |
|
* Arranges for the canvas to get redisplayed. |
| 867 |
|
* |
| 868 |
|
*---------------------------------------------------------------------- |
| 869 |
|
*/ |
| 870 |
|
|
| 871 |
|
static void |
| 872 |
|
ImageChangedProc(clientData, x, y, width, height, imgWidth, imgHeight) |
| 873 |
|
ClientData clientData; /* Pointer to canvas item for image. */ |
| 874 |
|
int x, y; /* Upper left pixel (within image) |
| 875 |
|
* that must be redisplayed. */ |
| 876 |
|
int width, height; /* Dimensions of area to redisplay |
| 877 |
|
* (may be <= 0). */ |
| 878 |
|
int imgWidth, imgHeight; /* New dimensions of image. */ |
| 879 |
|
{ |
| 880 |
|
ImageItem *imgPtr = (ImageItem *) clientData; |
| 881 |
|
|
| 882 |
|
/* |
| 883 |
|
* If the image's size changed and it's not anchored at its |
| 884 |
|
* northwest corner then just redisplay the entire area of the |
| 885 |
|
* image. This is a bit over-conservative, but we need to do |
| 886 |
|
* something because a size change also means a position change. |
| 887 |
|
*/ |
| 888 |
|
|
| 889 |
|
if (((imgPtr->header.x2 - imgPtr->header.x1) != imgWidth) |
| 890 |
|
|| ((imgPtr->header.y2 - imgPtr->header.y1) != imgHeight)) { |
| 891 |
|
x = y = 0; |
| 892 |
|
width = imgWidth; |
| 893 |
|
height = imgHeight; |
| 894 |
|
Tk_CanvasEventuallyRedraw(imgPtr->canvas, imgPtr->header.x1, |
| 895 |
|
imgPtr->header.y1, imgPtr->header.x2, imgPtr->header.y2); |
| 896 |
|
} |
| 897 |
|
ComputeImageBbox(imgPtr->canvas, imgPtr); |
| 898 |
|
Tk_CanvasEventuallyRedraw(imgPtr->canvas, imgPtr->header.x1 + x, |
| 899 |
|
imgPtr->header.y1 + y, (int) (imgPtr->header.x1 + x + width), |
| 900 |
|
(int) (imgPtr->header.y1 + y + height)); |
| 901 |
|
} |
| 902 |
|
|
| 903 |
|
/* End of tkcanvimg.c */ |
Parent Directory
| 
Revision Log
| 
Patch