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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkgeometry.c,v 1.1.1.1 2001/06/13 05:01:19 dtashley Exp $ */
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/*
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* tkGeometry.c --
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*
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* This file contains generic Tk code for geometry management
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* (stuff that's used by all geometry managers).
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*
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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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#include "tkPort.h"
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#include "tkInt.h"
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/*
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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
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* structures associated with its master.
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*/
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typedef struct MaintainSlave {
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Tk_Window slave; /* The slave window being positioned. */
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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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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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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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typedef struct MaintainMaster {
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Tk_Window ancestor; /* The lowest ancestor of this window
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* for which we have *not* created a
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* StructureNotify handler. May be the
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* same as the window itself. */
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int checkScheduled; /* Non-zero means that there is already a
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* call to MaintainCheckProc scheduled as
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* an idle handler. */
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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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/*
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* Prototypes for static procedures in this file:
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*/
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static void MaintainCheckProc _ANSI_ARGS_((ClientData clientData));
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static void MaintainMasterProc _ANSI_ARGS_((ClientData clientData,
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XEvent *eventPtr));
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static void MaintainSlaveProc _ANSI_ARGS_((ClientData clientData,
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XEvent *eventPtr));
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/*
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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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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
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* pass to geometry manager procedures. */
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{
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register TkWindow *winPtr = (TkWindow *) tkwin;
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if ((winPtr->geomMgrPtr != NULL) && (mgrPtr != NULL)
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&& ((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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*
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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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* 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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* changed.
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*
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*--------------------------------------------------------------
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*/
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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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* pertains to. */
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int reqWidth, reqHeight; /* Minimum desired dimensions for
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* window, in pixels. */
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{
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register TkWindow *winPtr = (TkWindow *) tkwin;
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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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*/
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if (reqWidth <= 0) {
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reqWidth = 1;
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}
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if (reqHeight <= 0) {
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reqHeight = 1;
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}
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if ((reqWidth == winPtr->reqWidth) && (reqHeight == winPtr->reqHeight)) {
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return;
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}
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winPtr->reqWidth = reqWidth;
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winPtr->reqHeight = reqHeight;
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if ((winPtr->geomMgrPtr != NULL)
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&& (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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*
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*----------------------------------------------------------------------
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*/
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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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register TkWindow *winPtr = (TkWindow *) tkwin;
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if (width == winPtr->internalBorderWidth) {
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return;
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}
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if (width < 0) {
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width = 0;
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}
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winPtr->internalBorderWidth = width;
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/*
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* 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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Tk_ResizeWindow(tkwin, Tk_Width(tkwin), Tk_Height(tkwin));
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}
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/*
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*----------------------------------------------------------------------
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*
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* Tk_MaintainGeometry --
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*
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* This procedure is invoked by geometry managers to handle slaves
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* 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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* None.
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*
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* Side effects:
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* 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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* 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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*
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*----------------------------------------------------------------------
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*/
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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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{
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Tcl_HashEntry *hPtr;
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MaintainMaster *masterPtr;
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register MaintainSlave *slavePtr;
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int new, map;
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Tk_Window ancestor, parent;
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TkDisplay *dispPtr = ((TkWindow *) master)->dispPtr;
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if (!dispPtr->geomInit) {
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dispPtr->geomInit = 1;
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Tcl_InitHashTable(&dispPtr->maintainHashTable, TCL_ONE_WORD_KEYS);
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}
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/*
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* See if there is already a MaintainMaster structure for the master;
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* if not, then create one.
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*/
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parent = Tk_Parent(slave);
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hPtr = Tcl_CreateHashEntry(&dispPtr->maintainHashTable,
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(char *) master, &new);
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if (!new) {
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masterPtr = (MaintainMaster *) Tcl_GetHashValue(hPtr);
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} else {
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masterPtr = (MaintainMaster *) ckalloc(sizeof(MaintainMaster));
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masterPtr->ancestor = master;
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masterPtr->checkScheduled = 0;
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masterPtr->slavePtr = NULL;
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Tcl_SetHashValue(hPtr, masterPtr);
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}
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/*
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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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*/
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| 282 |
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| 283 |
for (slavePtr = masterPtr->slavePtr; slavePtr != NULL;
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slavePtr = slavePtr->nextPtr) {
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| 285 |
if (slavePtr->slave == slave) {
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goto gotSlave;
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}
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}
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slavePtr = (MaintainSlave *) ckalloc(sizeof(MaintainSlave));
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| 290 |
slavePtr->slave = slave;
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slavePtr->master = master;
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slavePtr->nextPtr = masterPtr->slavePtr;
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masterPtr->slavePtr = slavePtr;
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Tk_CreateEventHandler(slave, StructureNotifyMask, MaintainSlaveProc,
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(ClientData) slavePtr);
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| 296 |
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/*
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| 298 |
* Make sure that there are event handlers registered for all
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| 299 |
* the windows between master and slave's parent (including master
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| 300 |
* but not slave's parent). There may already be handlers for master
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* and some of its ancestors (masterPtr->ancestor tells how many).
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*/
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| 303 |
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for (ancestor = master; ancestor != parent;
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ancestor = Tk_Parent(ancestor)) {
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| 306 |
if (ancestor == masterPtr->ancestor) {
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Tk_CreateEventHandler(ancestor, StructureNotifyMask,
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MaintainMasterProc, (ClientData) masterPtr);
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masterPtr->ancestor = Tk_Parent(ancestor);
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| 310 |
}
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| 311 |
}
|
| 312 |
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| 313 |
/*
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| 314 |
* Fill in up-to-date information in the structure, then update the
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| 315 |
* window if it's not currently in the right place or state.
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| 316 |
*/
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| 317 |
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| 318 |
gotSlave:
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| 319 |
slavePtr->x = x;
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| 320 |
slavePtr->y = y;
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slavePtr->width = width;
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| 322 |
slavePtr->height = height;
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| 323 |
map = 1;
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| 324 |
for (ancestor = slavePtr->master; ; ancestor = Tk_Parent(ancestor)) {
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| 325 |
if (!Tk_IsMapped(ancestor) && (ancestor != parent)) {
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| 326 |
map = 0;
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| 327 |
}
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| 328 |
if (ancestor == parent) {
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| 329 |
if ((x != Tk_X(slavePtr->slave))
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| 330 |
|| (y != Tk_Y(slavePtr->slave))
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| 331 |
|| (width != Tk_Width(slavePtr->slave))
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| 332 |
|| (height != Tk_Height(slavePtr->slave))) {
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| 333 |
Tk_MoveResizeWindow(slavePtr->slave, x, y, width, height);
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| 334 |
}
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| 335 |
if (map) {
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| 336 |
Tk_MapWindow(slavePtr->slave);
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| 337 |
} else {
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| 338 |
Tk_UnmapWindow(slavePtr->slave);
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| 339 |
}
|
| 340 |
break;
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| 341 |
}
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| 342 |
x += Tk_X(ancestor) + Tk_Changes(ancestor)->border_width;
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| 343 |
y += Tk_Y(ancestor) + Tk_Changes(ancestor)->border_width;
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| 344 |
}
|
| 345 |
}
|
| 346 |
|
| 347 |
/*
|
| 348 |
*----------------------------------------------------------------------
|
| 349 |
*
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| 350 |
* Tk_UnmaintainGeometry --
|
| 351 |
*
|
| 352 |
* This procedure cancels a previous Tk_MaintainGeometry call,
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| 353 |
* so that the relationship between slave and master is no longer
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| 354 |
* maintained.
|
| 355 |
*
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| 356 |
* Results:
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| 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 |
|
| 577 |
/* $History: tkGeometry.c $
|
| 578 |
*
|
| 579 |
* ***************** Version 1 *****************
|
| 580 |
* User: Dtashley Date: 1/02/01 Time: 2:47a
|
| 581 |
* Created in $/IjuScripter, IjuConsole/Source/Tk Base
|
| 582 |
* Initial check-in.
|
| 583 |
*/
|
| 584 |
|
| 585 |
/* End of TKGEOMETRY.C */ |
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