1 |
/* $Header$ */
|
2 |
|
3 |
/*
|
4 |
* tkGeometry.c --
|
5 |
*
|
6 |
* This file contains generic Tk code for geometry management
|
7 |
* (stuff that's used by all geometry managers).
|
8 |
*
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* Copyright (c) 1990-1994 The Regents of the University of California.
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* Copyright (c) 1994-1995 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: tkgeometry.c,v 1.1.1.1 2001/06/13 05:01:19 dtashley Exp $
|
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*/
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|
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#include "tkPort.h"
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19 |
#include "tkInt.h"
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20 |
|
21 |
/*
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* Data structures of the following type are used by Tk_MaintainGeometry.
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* For each slave managed by Tk_MaintainGeometry, there is one of these
|
24 |
* structures associated with its master.
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*/
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26 |
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typedef struct MaintainSlave {
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Tk_Window slave; /* The slave window being positioned. */
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29 |
Tk_Window master; /* The master that determines slave's
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* position; it must be a descendant of
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* slave's parent. */
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32 |
int x, y; /* Desired position of slave relative to
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* master. */
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int width, height; /* Desired dimensions of slave. */
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35 |
struct MaintainSlave *nextPtr;
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/* Next in list of Maintains associated
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* with master. */
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} MaintainSlave;
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/*
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* For each window that has been specified as a master to
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* Tk_MaintainGeometry, there is a structure of the following type:
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*/
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44 |
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45 |
typedef struct MaintainMaster {
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Tk_Window ancestor; /* The lowest ancestor of this window
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47 |
* for which we have *not* created a
|
48 |
* StructureNotify handler. May be the
|
49 |
* same as the window itself. */
|
50 |
int checkScheduled; /* Non-zero means that there is already a
|
51 |
* call to MaintainCheckProc scheduled as
|
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* an idle handler. */
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53 |
MaintainSlave *slavePtr; /* First in list of all slaves associated
|
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* with this master. */
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} MaintainMaster;
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56 |
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57 |
/*
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* Prototypes for static procedures in this file:
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*/
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60 |
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static void MaintainCheckProc _ANSI_ARGS_((ClientData clientData));
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62 |
static void MaintainMasterProc _ANSI_ARGS_((ClientData clientData,
|
63 |
XEvent *eventPtr));
|
64 |
static void MaintainSlaveProc _ANSI_ARGS_((ClientData clientData,
|
65 |
XEvent *eventPtr));
|
66 |
|
67 |
/*
|
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*--------------------------------------------------------------
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*
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* Tk_ManageGeometry --
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*
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* Arrange for a particular procedure to manage the geometry
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* of a given slave window.
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*
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* Results:
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* None.
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*
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* Side effects:
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* Proc becomes the new geometry manager for tkwin, replacing
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* any previous geometry manager. The geometry manager will
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* be notified (by calling procedures in *mgrPtr) when interesting
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* things happen in the future. If there was an existing geometry
|
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* manager for tkwin different from the new one, it is notified
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* by calling its lostSlaveProc.
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*
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*--------------------------------------------------------------
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*/
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88 |
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void
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Tk_ManageGeometry(tkwin, mgrPtr, clientData)
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Tk_Window tkwin; /* Window whose geometry is to
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* be managed by proc. */
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Tk_GeomMgr *mgrPtr; /* Static structure describing the
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* geometry manager. This structure
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* must never go away. */
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ClientData clientData; /* Arbitrary one-word argument to
|
97 |
* pass to geometry manager procedures. */
|
98 |
{
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99 |
register TkWindow *winPtr = (TkWindow *) tkwin;
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100 |
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if ((winPtr->geomMgrPtr != NULL) && (mgrPtr != NULL)
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102 |
&& ((winPtr->geomMgrPtr != mgrPtr)
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|| (winPtr->geomData != clientData))
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&& (winPtr->geomMgrPtr->lostSlaveProc != NULL)) {
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(*winPtr->geomMgrPtr->lostSlaveProc)(winPtr->geomData, tkwin);
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}
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winPtr->geomMgrPtr = mgrPtr;
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winPtr->geomData = clientData;
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}
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/*
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*--------------------------------------------------------------
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*
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* Tk_GeometryRequest --
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*
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* This procedure is invoked by widget code to indicate
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* its preferences about the size of a window it manages.
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* In general, widget code should call this procedure
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* rather than Tk_ResizeWindow.
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*
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* Results:
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* None.
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124 |
*
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* Side effects:
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* The geometry manager for tkwin (if any) is invoked to
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* handle the request. If possible, it will reconfigure
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128 |
* tkwin and/or other windows to satisfy the request. The
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* caller gets no indication of success or failure, but it
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* will get X events if the window size was actually
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131 |
* changed.
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132 |
*
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133 |
*--------------------------------------------------------------
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*/
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135 |
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void
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Tk_GeometryRequest(tkwin, reqWidth, reqHeight)
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Tk_Window tkwin; /* Window that geometry information
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139 |
* pertains to. */
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int reqWidth, reqHeight; /* Minimum desired dimensions for
|
141 |
* window, in pixels. */
|
142 |
{
|
143 |
register TkWindow *winPtr = (TkWindow *) tkwin;
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144 |
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/*
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* X gets very upset if a window requests a width or height of
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* zero, so rounds requested sizes up to at least 1.
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148 |
*/
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149 |
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if (reqWidth <= 0) {
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reqWidth = 1;
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152 |
}
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if (reqHeight <= 0) {
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reqHeight = 1;
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}
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156 |
if ((reqWidth == winPtr->reqWidth) && (reqHeight == winPtr->reqHeight)) {
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157 |
return;
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158 |
}
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159 |
winPtr->reqWidth = reqWidth;
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winPtr->reqHeight = reqHeight;
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if ((winPtr->geomMgrPtr != NULL)
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162 |
&& (winPtr->geomMgrPtr->requestProc != NULL)) {
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(*winPtr->geomMgrPtr->requestProc)(winPtr->geomData, tkwin);
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}
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}
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/*
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*----------------------------------------------------------------------
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*
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* Tk_SetInternalBorder --
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*
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* Notify relevant geometry managers that a window has an internal
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* border of a given width and that child windows should not be
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* placed on that border.
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*
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* Results:
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* None.
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*
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* Side effects:
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* The border width is recorded for the window, and all geometry
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* managers of all children are notified so that can re-layout, if
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* necessary.
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183 |
*
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*----------------------------------------------------------------------
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*/
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186 |
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187 |
void
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Tk_SetInternalBorder(tkwin, width)
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Tk_Window tkwin; /* Window that will have internal border. */
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int width; /* Width of internal border, in pixels. */
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{
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192 |
register TkWindow *winPtr = (TkWindow *) tkwin;
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193 |
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194 |
if (width == winPtr->internalBorderWidth) {
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return;
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196 |
}
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197 |
if (width < 0) {
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width = 0;
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199 |
}
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winPtr->internalBorderWidth = width;
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201 |
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202 |
/*
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203 |
* All the slaves for which this is the master window must now be
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* repositioned to take account of the new internal border width.
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* To signal all the geometry managers to do this, just resize the
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* window to its current size. The ConfigureNotify event will
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* cause geometry managers to recompute everything.
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*/
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209 |
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Tk_ResizeWindow(tkwin, Tk_Width(tkwin), Tk_Height(tkwin));
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}
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212 |
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213 |
/*
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214 |
*----------------------------------------------------------------------
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215 |
*
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216 |
* Tk_MaintainGeometry --
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217 |
*
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* This procedure is invoked by geometry managers to handle slaves
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219 |
* whose master's are not their parents. It translates the desired
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* geometry for the slave into the coordinate system of the parent
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* and respositions the slave if it isn't already at the right place.
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* Furthermore, it sets up event handlers so that if the master (or
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* any of its ancestors up to the slave's parent) is mapped, unmapped,
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* or moved, then the slave will be adjusted to match.
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*
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* Results:
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227 |
* None.
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*
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229 |
* Side effects:
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230 |
* Event handlers are created and state is allocated to keep track
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* of slave. Note: if slave was already managed for master by
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232 |
* Tk_MaintainGeometry, then the previous information is replaced
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* with the new information. The caller must eventually call
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* Tk_UnmaintainGeometry to eliminate the correspondence (or, the
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* state is automatically freed when either window is destroyed).
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236 |
*
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237 |
*----------------------------------------------------------------------
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238 |
*/
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239 |
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240 |
void
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Tk_MaintainGeometry(slave, master, x, y, width, height)
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Tk_Window slave; /* Slave for geometry management. */
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Tk_Window master; /* Master for slave; must be a descendant
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* of slave's parent. */
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int x, y; /* Desired position of slave within master. */
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int width, height; /* Desired dimensions for slave. */
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247 |
{
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248 |
Tcl_HashEntry *hPtr;
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249 |
MaintainMaster *masterPtr;
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250 |
register MaintainSlave *slavePtr;
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251 |
int new, map;
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252 |
Tk_Window ancestor, parent;
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253 |
TkDisplay *dispPtr = ((TkWindow *) master)->dispPtr;
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254 |
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255 |
if (!dispPtr->geomInit) {
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256 |
dispPtr->geomInit = 1;
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257 |
Tcl_InitHashTable(&dispPtr->maintainHashTable, TCL_ONE_WORD_KEYS);
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258 |
}
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259 |
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260 |
/*
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261 |
* See if there is already a MaintainMaster structure for the master;
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262 |
* if not, then create one.
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263 |
*/
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264 |
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265 |
parent = Tk_Parent(slave);
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266 |
hPtr = Tcl_CreateHashEntry(&dispPtr->maintainHashTable,
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267 |
(char *) master, &new);
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268 |
if (!new) {
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269 |
masterPtr = (MaintainMaster *) Tcl_GetHashValue(hPtr);
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270 |
} else {
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271 |
masterPtr = (MaintainMaster *) ckalloc(sizeof(MaintainMaster));
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272 |
masterPtr->ancestor = master;
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273 |
masterPtr->checkScheduled = 0;
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274 |
masterPtr->slavePtr = NULL;
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275 |
Tcl_SetHashValue(hPtr, masterPtr);
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276 |
}
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277 |
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278 |
/*
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279 |
* Create a MaintainSlave structure for the slave if there isn't
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280 |
* already one.
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281 |
*/
|
282 |
|
283 |
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
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284 |
slavePtr = slavePtr->nextPtr) {
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285 |
if (slavePtr->slave == slave) {
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286 |
goto gotSlave;
|
287 |
}
|
288 |
}
|
289 |
slavePtr = (MaintainSlave *) ckalloc(sizeof(MaintainSlave));
|
290 |
slavePtr->slave = slave;
|
291 |
slavePtr->master = master;
|
292 |
slavePtr->nextPtr = masterPtr->slavePtr;
|
293 |
masterPtr->slavePtr = slavePtr;
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294 |
Tk_CreateEventHandler(slave, StructureNotifyMask, MaintainSlaveProc,
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295 |
(ClientData) slavePtr);
|
296 |
|
297 |
/*
|
298 |
* Make sure that there are event handlers registered for all
|
299 |
* the windows between master and slave's parent (including master
|
300 |
* but not slave's parent). There may already be handlers for master
|
301 |
* and some of its ancestors (masterPtr->ancestor tells how many).
|
302 |
*/
|
303 |
|
304 |
for (ancestor = master; ancestor != parent;
|
305 |
ancestor = Tk_Parent(ancestor)) {
|
306 |
if (ancestor == masterPtr->ancestor) {
|
307 |
Tk_CreateEventHandler(ancestor, StructureNotifyMask,
|
308 |
MaintainMasterProc, (ClientData) masterPtr);
|
309 |
masterPtr->ancestor = Tk_Parent(ancestor);
|
310 |
}
|
311 |
}
|
312 |
|
313 |
/*
|
314 |
* Fill in up-to-date information in the structure, then update the
|
315 |
* window if it's not currently in the right place or state.
|
316 |
*/
|
317 |
|
318 |
gotSlave:
|
319 |
slavePtr->x = x;
|
320 |
slavePtr->y = y;
|
321 |
slavePtr->width = width;
|
322 |
slavePtr->height = height;
|
323 |
map = 1;
|
324 |
for (ancestor = slavePtr->master; ; ancestor = Tk_Parent(ancestor)) {
|
325 |
if (!Tk_IsMapped(ancestor) && (ancestor != parent)) {
|
326 |
map = 0;
|
327 |
}
|
328 |
if (ancestor == parent) {
|
329 |
if ((x != Tk_X(slavePtr->slave))
|
330 |
|| (y != Tk_Y(slavePtr->slave))
|
331 |
|| (width != Tk_Width(slavePtr->slave))
|
332 |
|| (height != Tk_Height(slavePtr->slave))) {
|
333 |
Tk_MoveResizeWindow(slavePtr->slave, x, y, width, height);
|
334 |
}
|
335 |
if (map) {
|
336 |
Tk_MapWindow(slavePtr->slave);
|
337 |
} else {
|
338 |
Tk_UnmapWindow(slavePtr->slave);
|
339 |
}
|
340 |
break;
|
341 |
}
|
342 |
x += Tk_X(ancestor) + Tk_Changes(ancestor)->border_width;
|
343 |
y += Tk_Y(ancestor) + Tk_Changes(ancestor)->border_width;
|
344 |
}
|
345 |
}
|
346 |
|
347 |
/*
|
348 |
*----------------------------------------------------------------------
|
349 |
*
|
350 |
* Tk_UnmaintainGeometry --
|
351 |
*
|
352 |
* This procedure cancels a previous Tk_MaintainGeometry call,
|
353 |
* so that the relationship between slave and master is no longer
|
354 |
* maintained.
|
355 |
*
|
356 |
* Results:
|
357 |
* None.
|
358 |
*
|
359 |
* Side effects:
|
360 |
* The slave is unmapped and state is released, so that slave won't
|
361 |
* track master any more. If we weren't previously managing slave
|
362 |
* relative to master, then this procedure has no effect.
|
363 |
*
|
364 |
*----------------------------------------------------------------------
|
365 |
*/
|
366 |
|
367 |
void
|
368 |
Tk_UnmaintainGeometry(slave, master)
|
369 |
Tk_Window slave; /* Slave for geometry management. */
|
370 |
Tk_Window master; /* Master for slave; must be a descendant
|
371 |
* of slave's parent. */
|
372 |
{
|
373 |
Tcl_HashEntry *hPtr;
|
374 |
MaintainMaster *masterPtr;
|
375 |
register MaintainSlave *slavePtr, *prevPtr;
|
376 |
Tk_Window ancestor;
|
377 |
TkDisplay *dispPtr = ((TkWindow *) slave)->dispPtr;
|
378 |
|
379 |
if (!dispPtr->geomInit) {
|
380 |
dispPtr->geomInit = 1;
|
381 |
Tcl_InitHashTable(&dispPtr->maintainHashTable, TCL_ONE_WORD_KEYS);
|
382 |
}
|
383 |
|
384 |
if (!(((TkWindow *) slave)->flags & TK_ALREADY_DEAD)) {
|
385 |
Tk_UnmapWindow(slave);
|
386 |
}
|
387 |
hPtr = Tcl_FindHashEntry(&dispPtr->maintainHashTable, (char *) master);
|
388 |
if (hPtr == NULL) {
|
389 |
return;
|
390 |
}
|
391 |
masterPtr = (MaintainMaster *) Tcl_GetHashValue(hPtr);
|
392 |
slavePtr = masterPtr->slavePtr;
|
393 |
if (slavePtr->slave == slave) {
|
394 |
masterPtr->slavePtr = slavePtr->nextPtr;
|
395 |
} else {
|
396 |
for (prevPtr = slavePtr, slavePtr = slavePtr->nextPtr; ;
|
397 |
prevPtr = slavePtr, slavePtr = slavePtr->nextPtr) {
|
398 |
if (slavePtr == NULL) {
|
399 |
return;
|
400 |
}
|
401 |
if (slavePtr->slave == slave) {
|
402 |
prevPtr->nextPtr = slavePtr->nextPtr;
|
403 |
break;
|
404 |
}
|
405 |
}
|
406 |
}
|
407 |
Tk_DeleteEventHandler(slavePtr->slave, StructureNotifyMask,
|
408 |
MaintainSlaveProc, (ClientData) slavePtr);
|
409 |
ckfree((char *) slavePtr);
|
410 |
if (masterPtr->slavePtr == NULL) {
|
411 |
if (masterPtr->ancestor != NULL) {
|
412 |
for (ancestor = master; ; ancestor = Tk_Parent(ancestor)) {
|
413 |
Tk_DeleteEventHandler(ancestor, StructureNotifyMask,
|
414 |
MaintainMasterProc, (ClientData) masterPtr);
|
415 |
if (ancestor == masterPtr->ancestor) {
|
416 |
break;
|
417 |
}
|
418 |
}
|
419 |
}
|
420 |
if (masterPtr->checkScheduled) {
|
421 |
Tcl_CancelIdleCall(MaintainCheckProc, (ClientData) masterPtr);
|
422 |
}
|
423 |
Tcl_DeleteHashEntry(hPtr);
|
424 |
ckfree((char *) masterPtr);
|
425 |
}
|
426 |
}
|
427 |
|
428 |
/*
|
429 |
*----------------------------------------------------------------------
|
430 |
*
|
431 |
* MaintainMasterProc --
|
432 |
*
|
433 |
* This procedure is invoked by the Tk event dispatcher in
|
434 |
* response to StructureNotify events on the master or one
|
435 |
* of its ancestors, on behalf of Tk_MaintainGeometry.
|
436 |
*
|
437 |
* Results:
|
438 |
* None.
|
439 |
*
|
440 |
* Side effects:
|
441 |
* It schedules a call to MaintainCheckProc, which will eventually
|
442 |
* caused the postions and mapped states to be recalculated for all
|
443 |
* the maintained slaves of the master. Or, if the master window is
|
444 |
* being deleted then state is cleaned up.
|
445 |
*
|
446 |
*----------------------------------------------------------------------
|
447 |
*/
|
448 |
|
449 |
static void
|
450 |
MaintainMasterProc(clientData, eventPtr)
|
451 |
ClientData clientData; /* Pointer to MaintainMaster structure
|
452 |
* for the master window. */
|
453 |
XEvent *eventPtr; /* Describes what just happened. */
|
454 |
{
|
455 |
MaintainMaster *masterPtr = (MaintainMaster *) clientData;
|
456 |
MaintainSlave *slavePtr;
|
457 |
int done;
|
458 |
|
459 |
if ((eventPtr->type == ConfigureNotify)
|
460 |
|| (eventPtr->type == MapNotify)
|
461 |
|| (eventPtr->type == UnmapNotify)) {
|
462 |
if (!masterPtr->checkScheduled) {
|
463 |
masterPtr->checkScheduled = 1;
|
464 |
Tcl_DoWhenIdle(MaintainCheckProc, (ClientData) masterPtr);
|
465 |
}
|
466 |
} else if (eventPtr->type == DestroyNotify) {
|
467 |
/*
|
468 |
* Delete all of the state associated with this master, but
|
469 |
* be careful not to use masterPtr after the last slave is
|
470 |
* deleted, since its memory will have been freed.
|
471 |
*/
|
472 |
|
473 |
done = 0;
|
474 |
do {
|
475 |
slavePtr = masterPtr->slavePtr;
|
476 |
if (slavePtr->nextPtr == NULL) {
|
477 |
done = 1;
|
478 |
}
|
479 |
Tk_UnmaintainGeometry(slavePtr->slave, slavePtr->master);
|
480 |
} while (!done);
|
481 |
}
|
482 |
}
|
483 |
|
484 |
/*
|
485 |
*----------------------------------------------------------------------
|
486 |
*
|
487 |
* MaintainSlaveProc --
|
488 |
*
|
489 |
* This procedure is invoked by the Tk event dispatcher in
|
490 |
* response to StructureNotify events on a slave being managed
|
491 |
* by Tk_MaintainGeometry.
|
492 |
*
|
493 |
* Results:
|
494 |
* None.
|
495 |
*
|
496 |
* Side effects:
|
497 |
* If the event is a DestroyNotify event then the Maintain state
|
498 |
* and event handlers for this slave are deleted.
|
499 |
*
|
500 |
*----------------------------------------------------------------------
|
501 |
*/
|
502 |
|
503 |
static void
|
504 |
MaintainSlaveProc(clientData, eventPtr)
|
505 |
ClientData clientData; /* Pointer to MaintainSlave structure
|
506 |
* for master-slave pair. */
|
507 |
XEvent *eventPtr; /* Describes what just happened. */
|
508 |
{
|
509 |
MaintainSlave *slavePtr = (MaintainSlave *) clientData;
|
510 |
|
511 |
if (eventPtr->type == DestroyNotify) {
|
512 |
Tk_UnmaintainGeometry(slavePtr->slave, slavePtr->master);
|
513 |
}
|
514 |
}
|
515 |
|
516 |
/*
|
517 |
*----------------------------------------------------------------------
|
518 |
*
|
519 |
* MaintainCheckProc --
|
520 |
*
|
521 |
* This procedure is invoked by the Tk event dispatcher as an
|
522 |
* idle handler, when a master or one of its ancestors has been
|
523 |
* reconfigured, mapped, or unmapped. Its job is to scan all of
|
524 |
* the slaves for the master and reposition them, map them, or
|
525 |
* unmap them as needed to maintain their geometry relative to
|
526 |
* the master.
|
527 |
*
|
528 |
* Results:
|
529 |
* None.
|
530 |
*
|
531 |
* Side effects:
|
532 |
* Slaves can get repositioned, mapped, or unmapped.
|
533 |
*
|
534 |
*----------------------------------------------------------------------
|
535 |
*/
|
536 |
|
537 |
static void
|
538 |
MaintainCheckProc(clientData)
|
539 |
ClientData clientData; /* Pointer to MaintainMaster structure
|
540 |
* for the master window. */
|
541 |
{
|
542 |
MaintainMaster *masterPtr = (MaintainMaster *) clientData;
|
543 |
MaintainSlave *slavePtr;
|
544 |
Tk_Window ancestor, parent;
|
545 |
int x, y, map;
|
546 |
|
547 |
masterPtr->checkScheduled = 0;
|
548 |
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
|
549 |
slavePtr = slavePtr->nextPtr) {
|
550 |
parent = Tk_Parent(slavePtr->slave);
|
551 |
x = slavePtr->x;
|
552 |
y = slavePtr->y;
|
553 |
map = 1;
|
554 |
for (ancestor = slavePtr->master; ; ancestor = Tk_Parent(ancestor)) {
|
555 |
if (!Tk_IsMapped(ancestor) && (ancestor != parent)) {
|
556 |
map = 0;
|
557 |
}
|
558 |
if (ancestor == parent) {
|
559 |
if ((x != Tk_X(slavePtr->slave))
|
560 |
|| (y != Tk_Y(slavePtr->slave))) {
|
561 |
Tk_MoveWindow(slavePtr->slave, x, y);
|
562 |
}
|
563 |
if (map) {
|
564 |
Tk_MapWindow(slavePtr->slave);
|
565 |
} else {
|
566 |
Tk_UnmapWindow(slavePtr->slave);
|
567 |
}
|
568 |
break;
|
569 |
}
|
570 |
x += Tk_X(ancestor) + Tk_Changes(ancestor)->border_width;
|
571 |
y += Tk_Y(ancestor) + Tk_Changes(ancestor)->border_width;
|
572 |
}
|
573 |
}
|
574 |
}
|
575 |
|
576 |
/* End of tkgeometry.c */
|