805 lines
23 KiB
C
805 lines
23 KiB
C
/*
|
||
* tkCanvWind.c --
|
||
*
|
||
* This file implements window items for canvas widgets.
|
||
*
|
||
* Copyright (c) 1992-1993 The Regents of the University of California.
|
||
* All rights reserved.
|
||
*
|
||
* Permission is hereby granted, without written agreement and without
|
||
* license or royalty fees, to use, copy, modify, and distribute this
|
||
* software and its documentation for any purpose, provided that the
|
||
* above copyright notice and the following two paragraphs appear in
|
||
* all copies of this software.
|
||
*
|
||
* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
|
||
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
|
||
* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
|
||
* CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
*
|
||
* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
|
||
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
||
* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
|
||
* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
|
||
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
|
||
*/
|
||
|
||
#ifndef lint
|
||
static char rcsid[] = "$Header: /user6/ouster/wish/RCS/tkCanvWind.c,v 1.10 93/10/06 16:27:45 ouster Exp $ SPRITE (Berkeley)";
|
||
#endif
|
||
|
||
#include <stdio.h>
|
||
#include "tkInt.h"
|
||
#include "tkConfig.h"
|
||
#include "tkCanvas.h"
|
||
|
||
/*
|
||
* The structure below defines the record for each window item.
|
||
*/
|
||
|
||
typedef struct WindowItem {
|
||
Tk_Item header; /* Generic stuff that's the same for all
|
||
* types. MUST BE FIRST IN STRUCTURE. */
|
||
double x, y; /* Coordinates of positioning point for
|
||
* window. */
|
||
Tk_Window tkwin; /* Window associated with item. NULL means
|
||
* window has been destroyed. */
|
||
int width; /* Width to use for window (<= 0 means use
|
||
* window's requested width). */
|
||
int height; /* Width to use for window (<= 0 means use
|
||
* window's requested width). */
|
||
Tk_Anchor anchor; /* Where to anchor window relative to
|
||
* (x,y). */
|
||
Tk_Canvas *canvasPtr; /* Canvas containing this item. */
|
||
} WindowItem;
|
||
|
||
/*
|
||
* Information used for parsing configuration specs:
|
||
*/
|
||
|
||
static Tk_ConfigSpec configSpecs[] = {
|
||
{TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL,
|
||
"center", Tk_Offset(WindowItem, anchor), TK_CONFIG_DONT_SET_DEFAULT},
|
||
{TK_CONFIG_PIXELS, "-height", (char *) NULL, (char *) NULL,
|
||
"0", Tk_Offset(WindowItem, height), TK_CONFIG_DONT_SET_DEFAULT},
|
||
{TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL,
|
||
(char *) NULL, 0, TK_CONFIG_NULL_OK, &tkCanvasTagsOption},
|
||
{TK_CONFIG_PIXELS, "-width", (char *) NULL, (char *) NULL,
|
||
"0", Tk_Offset(WindowItem, width), TK_CONFIG_DONT_SET_DEFAULT},
|
||
{TK_CONFIG_WINDOW, "-window", (char *) NULL, (char *) NULL,
|
||
(char *) NULL, Tk_Offset(WindowItem, tkwin), TK_CONFIG_NULL_OK},
|
||
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
|
||
(char *) NULL, 0, 0}
|
||
};
|
||
|
||
/*
|
||
* Prototypes for procedures defined in this file:
|
||
*/
|
||
|
||
static void ComputeWindowBbox _ANSI_ARGS_((Tk_Canvas *canvasPtr,
|
||
WindowItem *winItemPtr));
|
||
static int ConfigureWinItem _ANSI_ARGS_((
|
||
Tk_Canvas *canvasPtr, Tk_Item *itemPtr, int argc,
|
||
char **argv, int flags));
|
||
static int CreateWinItem _ANSI_ARGS_((Tk_Canvas *canvasPtr,
|
||
struct Tk_Item *itemPtr, int argc, char **argv));
|
||
static void DeleteWinItem _ANSI_ARGS_((Tk_Canvas *canvasPtr,
|
||
Tk_Item *itemPtr));
|
||
static void DisplayWinItem _ANSI_ARGS_((Tk_Canvas *canvasPtr,
|
||
Tk_Item *itemPtr, Drawable dst));
|
||
static void ScaleWinItem _ANSI_ARGS_((Tk_Canvas *canvasPtr,
|
||
Tk_Item *itemPtr, double originX, double originY,
|
||
double scaleX, double scaleY));
|
||
static void TranslateWinItem _ANSI_ARGS_((Tk_Canvas *canvasPtr,
|
||
Tk_Item *itemPtr, double deltaX, double deltaY));
|
||
static int WinItemCoords _ANSI_ARGS_((Tk_Canvas *canvasPtr,
|
||
Tk_Item *itemPtr, int argc, char **argv));
|
||
static void WinItemRequestProc _ANSI_ARGS_((ClientData clientData,
|
||
Tk_Window tkwin));
|
||
static void WinItemStructureProc _ANSI_ARGS_((
|
||
ClientData clientData, XEvent *eventPtr));
|
||
static int WinItemToArea _ANSI_ARGS_((Tk_Canvas *canvasPtr,
|
||
Tk_Item *itemPtr, double *rectPtr));
|
||
static double WinItemToPoint _ANSI_ARGS_((Tk_Canvas *canvasPtr,
|
||
Tk_Item *itemPtr, double *pointPtr));
|
||
|
||
/*
|
||
* The structures below defines the rectangle and oval item types
|
||
* by means of procedures that can be invoked by generic item code.
|
||
*/
|
||
|
||
Tk_ItemType TkWindowType = {
|
||
"window", /* name */
|
||
sizeof(WindowItem), /* itemSize */
|
||
CreateWinItem, /* createProc */
|
||
configSpecs, /* configSpecs */
|
||
ConfigureWinItem, /* configureProc */
|
||
WinItemCoords, /* coordProc */
|
||
DeleteWinItem, /* deleteProc */
|
||
DisplayWinItem, /* displayProc */
|
||
1, /* alwaysRedraw */
|
||
WinItemToPoint, /* pointProc */
|
||
WinItemToArea, /* areaProc */
|
||
(Tk_ItemPostscriptProc *) NULL, /* postscriptProc */
|
||
ScaleWinItem, /* scaleProc */
|
||
TranslateWinItem, /* translateProc */
|
||
(Tk_ItemIndexProc *) NULL, /* indexProc */
|
||
(Tk_ItemCursorProc *) NULL, /* cursorProc */
|
||
(Tk_ItemSelectionProc *) NULL, /* selectionProc */
|
||
(Tk_ItemInsertProc *) NULL, /* insertProc */
|
||
(Tk_ItemDCharsProc *) NULL, /* dTextProc */
|
||
(Tk_ItemType *) NULL /* nextPtr */
|
||
};
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* CreateWinItem --
|
||
*
|
||
* This procedure is invoked to create a new window
|
||
* 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
|
||
* canvasPtr->interp->result; in this case itemPtr is
|
||
* left uninitialized, so it can be safely freed by the
|
||
* caller.
|
||
*
|
||
* Side effects:
|
||
* A new window item is created.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
CreateWinItem(canvasPtr, itemPtr, argc, argv)
|
||
register Tk_Canvas *canvasPtr; /* 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. */
|
||
char **argv; /* Arguments describing rectangle. */
|
||
{
|
||
register WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
|
||
if (argc < 2) {
|
||
Tcl_AppendResult(canvasPtr->interp, "wrong # args: should be \"",
|
||
Tk_PathName(canvasPtr->tkwin), "\" create ",
|
||
itemPtr->typePtr->name, " x y ?options?",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Initialize item's record.
|
||
*/
|
||
|
||
winItemPtr->tkwin = NULL;
|
||
winItemPtr->width = 0;
|
||
winItemPtr->height = 0;
|
||
winItemPtr->anchor = TK_ANCHOR_CENTER;
|
||
winItemPtr->canvasPtr = canvasPtr;
|
||
|
||
/*
|
||
* Process the arguments to fill in the item record.
|
||
*/
|
||
|
||
if ((TkGetCanvasCoord(canvasPtr, argv[0], &winItemPtr->x) != TCL_OK)
|
||
|| (TkGetCanvasCoord(canvasPtr, argv[1],
|
||
&winItemPtr->y) != TCL_OK)) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
if (ConfigureWinItem(canvasPtr, itemPtr, argc-2, argv+2, 0) != TCL_OK) {
|
||
DeleteWinItem(canvasPtr, itemPtr);
|
||
return TCL_ERROR;
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* WinItemCoords --
|
||
*
|
||
* This procedure is invoked to process the "coords" widget
|
||
* command on window items. See the user documentation for
|
||
* details on what it does.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK or TCL_ERROR, and sets canvasPtr->interp->result.
|
||
*
|
||
* Side effects:
|
||
* The coordinates for the given item may be changed.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
WinItemCoords(canvasPtr, itemPtr, argc, argv)
|
||
register Tk_Canvas *canvasPtr; /* Canvas containing item. */
|
||
Tk_Item *itemPtr; /* Item whose coordinates are to be
|
||
* read or modified. */
|
||
int argc; /* Number of coordinates supplied in
|
||
* argv. */
|
||
char **argv; /* Array of coordinates: x1, y1,
|
||
* x2, y2, ... */
|
||
{
|
||
register WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
char x[TCL_DOUBLE_SPACE], y[TCL_DOUBLE_SPACE];
|
||
|
||
if (argc == 0) {
|
||
Tcl_PrintDouble(canvasPtr->interp, winItemPtr->x, x);
|
||
Tcl_PrintDouble(canvasPtr->interp, winItemPtr->y, y);
|
||
Tcl_AppendResult(canvasPtr->interp, x, " ", y, (char *) NULL);
|
||
} else if (argc == 2) {
|
||
if ((TkGetCanvasCoord(canvasPtr, argv[0], &winItemPtr->x) != TCL_OK)
|
||
|| (TkGetCanvasCoord(canvasPtr, argv[1],
|
||
&winItemPtr->y) != TCL_OK)) {
|
||
return TCL_ERROR;
|
||
}
|
||
ComputeWindowBbox(canvasPtr, winItemPtr);
|
||
} else {
|
||
sprintf(canvasPtr->interp->result,
|
||
"wrong # coordinates: expected 0 or 2, got %d",
|
||
argc);
|
||
return TCL_ERROR;
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* ConfigureWinItem --
|
||
*
|
||
* This procedure is invoked to configure various aspects
|
||
* of a window item, such as its anchor position.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result code. If an error occurs, then
|
||
* an error message is left in canvasPtr->interp->result.
|
||
*
|
||
* Side effects:
|
||
* Configuration information may be set for itemPtr.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ConfigureWinItem(canvasPtr, itemPtr, argc, argv, flags)
|
||
Tk_Canvas *canvasPtr; /* Canvas containing itemPtr. */
|
||
Tk_Item *itemPtr; /* Window item to reconfigure. */
|
||
int argc; /* Number of elements in argv. */
|
||
char **argv; /* Arguments describing things to configure. */
|
||
int flags; /* Flags to pass to Tk_ConfigureWidget. */
|
||
{
|
||
register WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
Tk_Window oldWindow;
|
||
|
||
oldWindow = winItemPtr->tkwin;
|
||
if (Tk_ConfigureWidget(canvasPtr->interp, canvasPtr->tkwin,
|
||
configSpecs, argc, argv, (char *) winItemPtr, flags) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* A few of the options require additional processing.
|
||
*/
|
||
|
||
if (oldWindow != winItemPtr->tkwin) {
|
||
if (oldWindow != NULL) {
|
||
Tk_DeleteEventHandler(oldWindow, StructureNotifyMask,
|
||
WinItemStructureProc, (ClientData) winItemPtr);
|
||
Tk_ManageGeometry(oldWindow, (Tk_GeometryProc *) NULL,
|
||
(ClientData) NULL);
|
||
Tk_UnmapWindow(oldWindow);
|
||
}
|
||
if (winItemPtr->tkwin != NULL) {
|
||
Tk_Window ancestor, parent;
|
||
|
||
/*
|
||
* Make sure that the canvas is either the parent of the
|
||
* window associated with the item or a descendant of that
|
||
* parent. Also, don't allow a top-level window to be
|
||
* managed inside a canvas.
|
||
*/
|
||
|
||
parent = Tk_Parent(winItemPtr->tkwin);
|
||
for (ancestor = canvasPtr->tkwin; ;
|
||
ancestor = Tk_Parent(ancestor)) {
|
||
if (ancestor == parent) {
|
||
break;
|
||
}
|
||
if (((Tk_FakeWin *) (ancestor))->flags & TK_TOP_LEVEL) {
|
||
badWindow:
|
||
Tcl_AppendResult(canvasPtr->interp, "can't use ",
|
||
Tk_PathName(winItemPtr->tkwin),
|
||
" in a window item of this canvas", (char *) NULL);
|
||
winItemPtr->tkwin = NULL;
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
if (((Tk_FakeWin *) (winItemPtr->tkwin))->flags & TK_TOP_LEVEL) {
|
||
goto badWindow;
|
||
}
|
||
if (winItemPtr->tkwin == canvasPtr->tkwin) {
|
||
goto badWindow;
|
||
}
|
||
Tk_CreateEventHandler(winItemPtr->tkwin, StructureNotifyMask,
|
||
WinItemStructureProc, (ClientData) winItemPtr);
|
||
Tk_ManageGeometry(winItemPtr->tkwin, WinItemRequestProc,
|
||
(ClientData) winItemPtr);
|
||
}
|
||
}
|
||
|
||
ComputeWindowBbox(canvasPtr, winItemPtr);
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* DeleteWinItem --
|
||
*
|
||
* This procedure is called to clean up the data structure
|
||
* associated with a window item.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Resources associated with itemPtr are released.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
DeleteWinItem(canvasPtr, itemPtr)
|
||
Tk_Canvas *canvasPtr; /* Overall info about widget. */
|
||
Tk_Item *itemPtr; /* Item that is being deleted. */
|
||
{
|
||
register WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
|
||
if (winItemPtr->tkwin != NULL) {
|
||
Tk_DeleteEventHandler(winItemPtr->tkwin, StructureNotifyMask,
|
||
WinItemStructureProc, (ClientData) winItemPtr);
|
||
Tk_ManageGeometry(winItemPtr->tkwin, (Tk_GeometryProc *) NULL,
|
||
(ClientData) NULL);
|
||
Tk_UnmapWindow(winItemPtr->tkwin);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* ComputeWindowBbox --
|
||
*
|
||
* This procedure is invoked to compute the bounding box of
|
||
* all the pixels that may be drawn as part of a window item.
|
||
* This procedure is where the child window'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
|
||
ComputeWindowBbox(canvasPtr, winItemPtr)
|
||
Tk_Canvas *canvasPtr; /* Canvas that contains item. */
|
||
register WindowItem *winItemPtr; /* Item whose bbox is to be
|
||
* recomputed. */
|
||
{
|
||
int width, height, x, y;
|
||
|
||
x = winItemPtr->x + 0.5;
|
||
y = winItemPtr->y + 0.5;
|
||
|
||
if (winItemPtr->tkwin == NULL) {
|
||
winItemPtr->header.x1 = winItemPtr->header.x2 = x;
|
||
winItemPtr->header.y1 = winItemPtr->header.y2 = y;
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Compute dimensions of window.
|
||
*/
|
||
|
||
width = winItemPtr->width;
|
||
if (width <= 0) {
|
||
width = Tk_ReqWidth(winItemPtr->tkwin);
|
||
if (width <= 0) {
|
||
width = 1;
|
||
}
|
||
}
|
||
height = winItemPtr->height;
|
||
if (height <= 0) {
|
||
height = Tk_ReqHeight(winItemPtr->tkwin);
|
||
if (height <= 0) {
|
||
height = 1;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Compute location of window, using anchor information.
|
||
*/
|
||
|
||
switch (winItemPtr->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.
|
||
*/
|
||
|
||
winItemPtr->header.x1 = x;
|
||
winItemPtr->header.y1 = y;
|
||
winItemPtr->header.x2 = x + width;
|
||
winItemPtr->header.y2 = y + height;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* DisplayWinItem --
|
||
*
|
||
* This procedure is invoked to "draw" a window item in a given
|
||
* drawable. Since the window draws itself, we needn't do any
|
||
* actual redisplay here. However, this procedure takes care
|
||
* of actually repositioning the child window so that it occupies
|
||
* the correct screen position.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The child window's position may get changed.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
DisplayWinItem(canvasPtr, itemPtr, drawable)
|
||
register Tk_Canvas *canvasPtr; /* Canvas that contains item. */
|
||
Tk_Item *itemPtr; /* Item to be displayed. */
|
||
Drawable drawable; /* Pixmap or window in which to draw
|
||
* item. */
|
||
{
|
||
register WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
int x,y, width, height;
|
||
Tk_Window ancestor, parent;
|
||
|
||
if (winItemPtr->tkwin == NULL) {
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Note: this procedure gets called both when a window needs to
|
||
* be displayed and when it ceases to be visible on the screen
|
||
* (e.g. it was scrolled or moved off-screen or the enclosing
|
||
* canvas is unmapped).
|
||
*/
|
||
|
||
if (!Tk_IsMapped(canvasPtr->tkwin)) {
|
||
/*
|
||
* Enclosing canvas just became unmapped; unmap the child window
|
||
* too.
|
||
*/
|
||
Tk_UnmapWindow(winItemPtr->tkwin);
|
||
return;
|
||
}
|
||
x = winItemPtr->header.x1 - canvasPtr->xOrigin;
|
||
y = winItemPtr->header.y1 - canvasPtr->yOrigin;
|
||
width = winItemPtr->header.x2 - winItemPtr->header.x1;
|
||
height = winItemPtr->header.y2 - winItemPtr->header.y1;
|
||
|
||
/*
|
||
* If the canvas isn't the parent of the window, then translate the
|
||
* coordinates from those of the canvas to those of the window's
|
||
* parent.
|
||
*/
|
||
|
||
parent = Tk_Parent(winItemPtr->tkwin);
|
||
for (ancestor = canvasPtr->tkwin; ancestor != parent;
|
||
ancestor = Tk_Parent(ancestor)) {
|
||
x += Tk_X(ancestor) + Tk_Changes(ancestor)->border_width;
|
||
y += Tk_Y(ancestor) + Tk_Changes(ancestor)->border_width;
|
||
}
|
||
|
||
/*
|
||
* Reconfigure the window if it isn't already in the correct place.
|
||
*/
|
||
|
||
if ((x != Tk_X(winItemPtr->tkwin)) || (y != Tk_Y(winItemPtr->tkwin))
|
||
|| (width != Tk_Width(winItemPtr->tkwin))
|
||
|| (height != Tk_Height(winItemPtr->tkwin))) {
|
||
Tk_MoveResizeWindow(winItemPtr->tkwin, x, y, (unsigned int) width,
|
||
(unsigned int) height);
|
||
}
|
||
if (!Tk_IsMapped(winItemPtr->tkwin)) {
|
||
Tk_MapWindow(winItemPtr->tkwin);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* WinItemToPoint --
|
||
*
|
||
* 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 window. If the
|
||
* point isn't inside the window then the return value is the
|
||
* distance from the point to the window.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static double
|
||
WinItemToPoint(canvasPtr, itemPtr, pointPtr)
|
||
Tk_Canvas *canvasPtr; /* Canvas containing item. */
|
||
Tk_Item *itemPtr; /* Item to check against point. */
|
||
double *pointPtr; /* Pointer to x and y coordinates. */
|
||
{
|
||
register WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
double x1, x2, y1, y2, xDiff, yDiff;
|
||
|
||
x1 = winItemPtr->header.x1;
|
||
y1 = winItemPtr->header.y1;
|
||
x2 = winItemPtr->header.x2;
|
||
y2 = winItemPtr->header.y2;
|
||
|
||
/*
|
||
* Point is outside rectangle.
|
||
*/
|
||
|
||
if (pointPtr[0] < x1) {
|
||
xDiff = x1 - pointPtr[0];
|
||
} else if (pointPtr[0] >= x2) {
|
||
xDiff = pointPtr[0] + 1 - x2;
|
||
} else {
|
||
xDiff = 0;
|
||
}
|
||
|
||
if (pointPtr[1] < y1) {
|
||
yDiff = y1 - pointPtr[1];
|
||
} else if (pointPtr[1] >= y2) {
|
||
yDiff = pointPtr[1] + 1 - y2;
|
||
} else {
|
||
yDiff = 0;
|
||
}
|
||
|
||
return hypot(xDiff, yDiff);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* WinItemToArea --
|
||
*
|
||
* 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.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static int
|
||
WinItemToArea(canvasPtr, itemPtr, rectPtr)
|
||
Tk_Canvas *canvasPtr; /* 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. */
|
||
{
|
||
register WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
|
||
if ((rectPtr[2] <= winItemPtr->header.x1)
|
||
|| (rectPtr[0] >= winItemPtr->header.x2)
|
||
|| (rectPtr[3] <= winItemPtr->header.y1)
|
||
|| (rectPtr[1] >= winItemPtr->header.y2)) {
|
||
return -1;
|
||
}
|
||
if ((rectPtr[0] <= winItemPtr->header.x1)
|
||
&& (rectPtr[1] <= winItemPtr->header.y1)
|
||
&& (rectPtr[2] >= winItemPtr->header.x2)
|
||
&& (rectPtr[3] >= winItemPtr->header.y2)) {
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* ScaleWinItem --
|
||
*
|
||
* This procedure is invoked to rescale a rectangle or oval
|
||
* item.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The rectangle or oval 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
|
||
ScaleWinItem(canvasPtr, itemPtr, originX, originY, scaleX, scaleY)
|
||
Tk_Canvas *canvasPtr; /* 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. */
|
||
{
|
||
register WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
|
||
winItemPtr->x = originX + scaleX*(winItemPtr->x - originX);
|
||
winItemPtr->y = originY + scaleY*(winItemPtr->y - originY);
|
||
if (winItemPtr->width > 0) {
|
||
winItemPtr->width = scaleY*winItemPtr->width;
|
||
}
|
||
if (winItemPtr->height > 0) {
|
||
winItemPtr->height = scaleY*winItemPtr->height;
|
||
}
|
||
ComputeWindowBbox(canvasPtr, winItemPtr);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* TranslateWinItem --
|
||
*
|
||
* This procedure is called to move a rectangle or oval by a
|
||
* given amount.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The position of the rectangle or oval is offset by
|
||
* (xDelta, yDelta), and the bounding box is updated in the
|
||
* generic part of the item structure.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
TranslateWinItem(canvasPtr, itemPtr, deltaX, deltaY)
|
||
Tk_Canvas *canvasPtr; /* Canvas containing item. */
|
||
Tk_Item *itemPtr; /* Item that is being moved. */
|
||
double deltaX, deltaY; /* Amount by which item is to be
|
||
* moved. */
|
||
{
|
||
register WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
|
||
winItemPtr->x += deltaX;
|
||
winItemPtr->y += deltaY;
|
||
ComputeWindowBbox(canvasPtr, winItemPtr);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* WinItemStructureProc --
|
||
*
|
||
* This procedure is invoked whenever StructureNotify events
|
||
* occur for a window that's managed as part of a canvas window
|
||
* item. This procudure's only purpose is to clean up when
|
||
* windows are deleted.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The window is disassociated from the window item when it is
|
||
* deleted.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
WinItemStructureProc(clientData, eventPtr)
|
||
ClientData clientData; /* Pointer to record describing window item. */
|
||
XEvent *eventPtr; /* Describes what just happened. */
|
||
{
|
||
register WindowItem *winItemPtr = (WindowItem *) clientData;
|
||
|
||
if (eventPtr->type == DestroyNotify) {
|
||
winItemPtr->tkwin = NULL;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* WinItemRequestProc --
|
||
*
|
||
* This procedure is invoked whenever a window that's associated
|
||
* with a window canvas item changes its requested dimensions.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The size and location on the screen of the window may change,
|
||
* depending on the options specified for the window item.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
WinItemRequestProc(clientData, tkwin)
|
||
ClientData clientData; /* Pointer to record for window item. */
|
||
Tk_Window tkwin; /* Window that changed its desired
|
||
* size. */
|
||
{
|
||
WindowItem *winItemPtr = (WindowItem *) clientData;
|
||
|
||
ComputeWindowBbox(winItemPtr->canvasPtr, winItemPtr);
|
||
DisplayWinItem(winItemPtr->canvasPtr, (Tk_Item *) winItemPtr,
|
||
(Drawable) None);
|
||
}
|