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Diffstat (limited to 'tcl/generic/tkSquare.c')
| -rw-r--r-- | tcl/generic/tkSquare.c | 621 |
1 files changed, 0 insertions, 621 deletions
diff --git a/tcl/generic/tkSquare.c b/tcl/generic/tkSquare.c deleted file mode 100644 index 50615ffbcaf..00000000000 --- a/tcl/generic/tkSquare.c +++ /dev/null @@ -1,621 +0,0 @@ -/* - * tkSquare.c -- - * - * This module implements "square" widgets that are object - * based. A "square" is a widget that displays a single square that can - * be moved around and resized. This file is intended as an example - * of how to build a widget; it isn't included in the - * normal wish, but it is included in "tktest". - * - * Copyright (c) 1997 Sun Microsystems, Inc. - * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id$ - */ - -#include "tkPort.h" -#define __NO_OLD_CONFIG -#include "tk.h" -#include "tkInt.h" - -/* - * A data structure of the following type is kept for each square - * widget managed by this file: - */ - -typedef struct { - Tk_Window tkwin; /* Window that embodies the square. NULL - * means window has been deleted but - * widget record hasn't been cleaned up yet. */ - Display *display; /* X's token for the window's display. */ - Tcl_Interp *interp; /* Interpreter associated with widget. */ - Tcl_Command widgetCmd; /* Token for square's widget command. */ - Tk_OptionTable optionTable; /* Token representing the configuration - * specifications. */ - Tcl_Obj *xPtr, *yPtr; /* Position of square's upper-left corner - * within widget. */ - int x, y; - Tcl_Obj *sizeObjPtr; /* Width and height of square. */ - - /* - * Information used when displaying widget: - */ - - Tcl_Obj *borderWidthPtr; /* Width of 3-D border around whole widget. */ - Tcl_Obj *bgBorderPtr; - Tcl_Obj *fgBorderPtr; - Tcl_Obj *reliefPtr; - GC gc; /* Graphics context for copying from - * off-screen pixmap onto screen. */ - Tcl_Obj *doubleBufferPtr; /* Non-zero means double-buffer redisplay - * with pixmap; zero means draw straight - * onto the display. */ - int updatePending; /* Non-zero means a call to SquareDisplay - * has already been scheduled. */ -} Square; - -/* - * Information used for argv parsing. - */ - -static Tk_OptionSpec optionSpecs[] = { - {TK_OPTION_BORDER, "-background", "background", "Background", - "#d9d9d9", Tk_Offset(Square, bgBorderPtr), -1, 0, - (ClientData) "white"}, - {TK_OPTION_SYNONYM, "-bd", (char *) NULL, (char *) NULL, - (char *) NULL, 0, -1, 0, (ClientData) "-borderwidth"}, - {TK_OPTION_SYNONYM, "-bg", (char *) NULL, (char *) NULL, - (char *) NULL, 0, -1, 0, (ClientData) "-background"}, - {TK_OPTION_PIXELS, "-borderwidth", "borderWidth", "BorderWidth", - "2", Tk_Offset(Square, borderWidthPtr), -1}, - {TK_OPTION_BOOLEAN, "-dbl", "doubleBuffer", "DoubleBuffer", - "1", Tk_Offset(Square, doubleBufferPtr), -1}, - {TK_OPTION_SYNONYM, "-fg", (char *) NULL, (char *) NULL, - (char *) NULL, 0, -1, 0, (ClientData) "-foreground"}, - {TK_OPTION_BORDER, "-foreground", "foreground", "Foreground", - "#b03060", Tk_Offset(Square, fgBorderPtr), -1, 0, - (ClientData) "black"}, - {TK_OPTION_PIXELS, "-posx", "posx", "PosX", "0", - Tk_Offset(Square, xPtr), -1}, - {TK_OPTION_PIXELS, "-posy", "posy", "PosY", "0", - Tk_Offset(Square, yPtr), -1}, - {TK_OPTION_RELIEF, "-relief", "relief", "Relief", - "raised", Tk_Offset(Square, reliefPtr), -1}, - {TK_OPTION_PIXELS, "-size", "size", "Size", "20", - Tk_Offset(Square, sizeObjPtr), -1}, - {TK_OPTION_END} -}; - -/* - * Forward declarations for procedures defined later in this file: - */ - -int SquareObjCmd _ANSI_ARGS_((ClientData clientData, - Tcl_Interp *interp, int objc, - Tcl_Obj * CONST objv[])); -static void SquareDeletedProc _ANSI_ARGS_(( - ClientData clientData)); -static int SquareConfigure _ANSI_ARGS_((Tcl_Interp *interp, - Square *squarePtr)); -static void SquareDestroy _ANSI_ARGS_((char *memPtr)); -static void SquareDisplay _ANSI_ARGS_((ClientData clientData)); -static void KeepInWindow _ANSI_ARGS_((Square *squarePtr)); -static void SquareObjEventProc _ANSI_ARGS_((ClientData clientData, - XEvent *eventPtr)); -static int SquareWidgetObjCmd _ANSI_ARGS_((ClientData clientData, - Tcl_Interp *, int objc, Tcl_Obj * CONST objv[])); - -/* - *-------------------------------------------------------------- - * - * SquareCmd -- - * - * This procedure is invoked to process the "square" Tcl - * command. It creates a new "square" widget. - * - * Results: - * A standard Tcl result. - * - * Side effects: - * A new widget is created and configured. - * - *-------------------------------------------------------------- - */ - -int -SquareObjCmd(clientData, interp, objc, objv) - ClientData clientData; /* NULL. */ - Tcl_Interp *interp; /* Current interpreter. */ - int objc; /* Number of arguments. */ - Tcl_Obj * CONST objv[]; /* Argument objects. */ -{ - Square *squarePtr; - Tk_Window tkwin; - Tk_OptionTable optionTable; - - if (objc < 2) { - Tcl_WrongNumArgs(interp, 1, objv, "pathName ?options?"); - return TCL_ERROR; - } - - tkwin = Tk_CreateWindowFromPath(interp, Tk_MainWindow(interp), - Tcl_GetStringFromObj(objv[1], NULL), (char *) NULL); - if (tkwin == NULL) { - return TCL_ERROR; - } - Tk_SetClass(tkwin, "Square"); - - /* - * Create the option table for this widget class. If it has - * already been created, the refcount will get bumped and just - * the pointer will be returned. The refcount getting bumped - * does not concern us, because Tk will ensure the table is - * deleted when the interpreter is destroyed. - */ - - optionTable = Tk_CreateOptionTable(interp, optionSpecs); - - /* - * Allocate and initialize the widget record. The memset allows - * us to set just the non-NULL/0 items. - */ - - squarePtr = (Square *) ckalloc(sizeof(Square)); - memset((void *) squarePtr, 0, (sizeof(Square))); - - squarePtr->tkwin = tkwin; - squarePtr->display = Tk_Display(tkwin); - squarePtr->interp = interp; - squarePtr->widgetCmd = Tcl_CreateObjCommand(interp, - Tk_PathName(squarePtr->tkwin), SquareWidgetObjCmd, - (ClientData) squarePtr, SquareDeletedProc); - squarePtr->gc = None; - squarePtr->optionTable = optionTable; - - if (Tk_InitOptions(interp, (char *) squarePtr, optionTable, tkwin) - != TCL_OK) { - Tk_DestroyWindow(squarePtr->tkwin); - ckfree((char *) squarePtr); - return TCL_ERROR; - } - - Tk_CreateEventHandler(squarePtr->tkwin, ExposureMask|StructureNotifyMask, - SquareObjEventProc, (ClientData) squarePtr); - if (Tk_SetOptions(interp, (char *) squarePtr, optionTable, objc - 2, - objv + 2, tkwin, NULL, (int *) NULL) != TCL_OK) { - goto error; - } - if (SquareConfigure(interp, squarePtr) != TCL_OK) { - goto error; - } - - Tcl_SetObjResult(interp, - Tcl_NewStringObj(Tk_PathName(squarePtr->tkwin), -1)); - return TCL_OK; - -error: - Tk_DestroyWindow(squarePtr->tkwin); - return TCL_ERROR; -} - -/* - *-------------------------------------------------------------- - * - * SquareWidgetObjCmd -- - * - * This procedure is invoked to process the Tcl command - * that corresponds to a widget managed by this module. - * See the user documentation for details on what it does. - * - * Results: - * A standard Tcl result. - * - * Side effects: - * See the user documentation. - * - *-------------------------------------------------------------- - */ - -static int -SquareWidgetObjCmd(clientData, interp, objc, objv) - ClientData clientData; /* Information about square widget. */ - Tcl_Interp *interp; /* Current interpreter. */ - int objc; /* Number of arguments. */ - Tcl_Obj * CONST objv[]; /* Argument objects. */ -{ - Square *squarePtr = (Square *) clientData; - int result = TCL_OK; - static CONST char *squareOptions[] = {"cget", "configure", (char *) NULL}; - enum { - SQUARE_CGET, SQUARE_CONFIGURE - }; - Tcl_Obj *resultObjPtr; - int index; - - if (objc < 2) { - Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg...?"); - return TCL_ERROR; - } - - if (Tcl_GetIndexFromObj(interp, objv[1], squareOptions, "command", - 0, &index) != TCL_OK) { - return TCL_ERROR; - } - - Tcl_Preserve((ClientData) squarePtr); - - switch (index) { - case SQUARE_CGET: { - if (objc != 3) { - Tcl_WrongNumArgs(interp, 2, objv, "option"); - goto error; - } - resultObjPtr = Tk_GetOptionValue(interp, (char *) squarePtr, - squarePtr->optionTable, objv[2], squarePtr->tkwin); - if (resultObjPtr == NULL) { - result = TCL_ERROR; - } else { - Tcl_SetObjResult(interp, resultObjPtr); - } - break; - } - case SQUARE_CONFIGURE: { - resultObjPtr = NULL; - if (objc == 2) { - resultObjPtr = Tk_GetOptionInfo(interp, (char *) squarePtr, - squarePtr->optionTable, (Tcl_Obj *) NULL, - squarePtr->tkwin); - if (resultObjPtr == NULL) { - result = TCL_ERROR; - } - } else if (objc == 3) { - resultObjPtr = Tk_GetOptionInfo(interp, (char *) squarePtr, - squarePtr->optionTable, objv[2], squarePtr->tkwin); - if (resultObjPtr == NULL) { - result = TCL_ERROR; - } - } else { - result = Tk_SetOptions(interp, (char *) squarePtr, - squarePtr->optionTable, objc - 2, objv + 2, - squarePtr->tkwin, NULL, (int *) NULL); - if (result == TCL_OK) { - result = SquareConfigure(interp, squarePtr); - } - if (!squarePtr->updatePending) { - Tcl_DoWhenIdle(SquareDisplay, (ClientData) squarePtr); - squarePtr->updatePending = 1; - } - } - if (resultObjPtr != NULL) { - Tcl_SetObjResult(interp, resultObjPtr); - } - } - } - Tcl_Release((ClientData) squarePtr); - return result; - - error: - Tcl_Release((ClientData) squarePtr); - return TCL_ERROR; -} - -/* - *---------------------------------------------------------------------- - * - * SquareConfigure -- - * - * This procedure is called to process an argv/argc list in - * conjunction with the Tk option database to configure (or - * reconfigure) a square widget. - * - * Results: - * The return value is a standard Tcl result. If TCL_ERROR is - * returned, then the interp's result contains an error message. - * - * Side effects: - * Configuration information, such as colors, border width, - * etc. get set for squarePtr; old resources get freed, - * if there were any. - * - *---------------------------------------------------------------------- - */ - -static int -SquareConfigure(interp, squarePtr) - Tcl_Interp *interp; /* Used for error reporting. */ - Square *squarePtr; /* Information about widget. */ -{ - int borderWidth; - Tk_3DBorder bgBorder; - int doubleBuffer; - - /* - * Set the background for the window and create a graphics context - * for use during redisplay. - */ - - bgBorder = Tk_Get3DBorderFromObj(squarePtr->tkwin, - squarePtr->bgBorderPtr); - Tk_SetWindowBackground(squarePtr->tkwin, - Tk_3DBorderColor(bgBorder)->pixel); - Tcl_GetBooleanFromObj(NULL, squarePtr->doubleBufferPtr, &doubleBuffer); - if ((squarePtr->gc == None) && (doubleBuffer)) { - XGCValues gcValues; - gcValues.function = GXcopy; - gcValues.graphics_exposures = False; - squarePtr->gc = Tk_GetGC(squarePtr->tkwin, - GCFunction|GCGraphicsExposures, &gcValues); - } - - /* - * Register the desired geometry for the window. Then arrange for - * the window to be redisplayed. - */ - - Tk_GeometryRequest(squarePtr->tkwin, 200, 150); - Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->borderWidthPtr, - &borderWidth); - Tk_SetInternalBorder(squarePtr->tkwin, borderWidth); - if (!squarePtr->updatePending) { - Tcl_DoWhenIdle(SquareDisplay, (ClientData) squarePtr); - squarePtr->updatePending = 1; - } - KeepInWindow(squarePtr); - return TCL_OK; -} - -/* - *-------------------------------------------------------------- - * - * SquareObjEventProc -- - * - * This procedure is invoked by the Tk dispatcher for various - * events on squares. - * - * Results: - * None. - * - * Side effects: - * When the window gets deleted, internal structures get - * cleaned up. When it gets exposed, it is redisplayed. - * - *-------------------------------------------------------------- - */ - -static void -SquareObjEventProc(clientData, eventPtr) - ClientData clientData; /* Information about window. */ - XEvent *eventPtr; /* Information about event. */ -{ - Square *squarePtr = (Square *) clientData; - - if (eventPtr->type == Expose) { - if (!squarePtr->updatePending) { - Tcl_DoWhenIdle(SquareDisplay, (ClientData) squarePtr); - squarePtr->updatePending = 1; - } - } else if (eventPtr->type == ConfigureNotify) { - KeepInWindow(squarePtr); - if (!squarePtr->updatePending) { - Tcl_DoWhenIdle(SquareDisplay, (ClientData) squarePtr); - squarePtr->updatePending = 1; - } - } else if (eventPtr->type == DestroyNotify) { - if (squarePtr->tkwin != NULL) { - Tk_FreeConfigOptions((char *) squarePtr, squarePtr->optionTable, - squarePtr->tkwin); - if (squarePtr->gc != None) { - Tk_FreeGC(squarePtr->display, squarePtr->gc); - } - squarePtr->tkwin = NULL; - Tcl_DeleteCommandFromToken(squarePtr->interp, - squarePtr->widgetCmd); - } - if (squarePtr->updatePending) { - Tcl_CancelIdleCall(SquareDisplay, (ClientData) squarePtr); - } - Tcl_EventuallyFree((ClientData) squarePtr, SquareDestroy); - } -} - -/* - *---------------------------------------------------------------------- - * - * SquareDeletedProc -- - * - * This procedure is invoked when a widget command is deleted. If - * the widget isn't already in the process of being destroyed, - * this command destroys it. - * - * Results: - * None. - * - * Side effects: - * The widget is destroyed. - * - *---------------------------------------------------------------------- - */ - -static void -SquareDeletedProc(clientData) - ClientData clientData; /* Pointer to widget record for widget. */ -{ - Square *squarePtr = (Square *) clientData; - Tk_Window tkwin = squarePtr->tkwin; - - /* - * This procedure could be invoked either because the window was - * destroyed and the command was then deleted (in which case tkwin - * is NULL) or because the command was deleted, and then this procedure - * destroys the widget. - */ - - if (tkwin != NULL) { - Tk_DestroyWindow(tkwin); - } -} - -/* - *-------------------------------------------------------------- - * - * SquareDisplay -- - * - * This procedure redraws the contents of a square window. - * It is invoked as a do-when-idle handler, so it only runs - * when there's nothing else for the application to do. - * - * Results: - * None. - * - * Side effects: - * Information appears on the screen. - * - *-------------------------------------------------------------- - */ - -static void -SquareDisplay(clientData) - ClientData clientData; /* Information about window. */ -{ - Square *squarePtr = (Square *) clientData; - Tk_Window tkwin = squarePtr->tkwin; - Pixmap pm = None; - Drawable d; - int borderWidth, size, relief; - Tk_3DBorder bgBorder, fgBorder; - int doubleBuffer; - - squarePtr->updatePending = 0; - if (!Tk_IsMapped(tkwin)) { - return; - } - - /* - * Create a pixmap for double-buffering, if necessary. - */ - - Tcl_GetBooleanFromObj(NULL, squarePtr->doubleBufferPtr, &doubleBuffer); - if (doubleBuffer) { - pm = Tk_GetPixmap(Tk_Display(tkwin), Tk_WindowId(tkwin), - Tk_Width(tkwin), Tk_Height(tkwin), - DefaultDepthOfScreen(Tk_Screen(tkwin))); - d = pm; - } else { - d = Tk_WindowId(tkwin); - } - - /* - * Redraw the widget's background and border. - */ - - Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->borderWidthPtr, - &borderWidth); - bgBorder = Tk_Get3DBorderFromObj(squarePtr->tkwin, - squarePtr->bgBorderPtr); - Tk_GetReliefFromObj(NULL, squarePtr->reliefPtr, &relief); - Tk_Fill3DRectangle(tkwin, d, bgBorder, 0, 0, Tk_Width(tkwin), - Tk_Height(tkwin), borderWidth, relief); - - /* - * Display the square. - */ - - Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->sizeObjPtr, &size); - fgBorder = Tk_Get3DBorderFromObj(squarePtr->tkwin, - squarePtr->fgBorderPtr); - Tk_Fill3DRectangle(tkwin, d, fgBorder, squarePtr->x, squarePtr->y, size, - size, borderWidth, TK_RELIEF_RAISED); - - /* - * If double-buffered, copy to the screen and release the pixmap. - */ - - if (doubleBuffer) { - XCopyArea(Tk_Display(tkwin), pm, Tk_WindowId(tkwin), squarePtr->gc, - 0, 0, (unsigned) Tk_Width(tkwin), (unsigned) Tk_Height(tkwin), - 0, 0); - Tk_FreePixmap(Tk_Display(tkwin), pm); - } -} - -/* - *---------------------------------------------------------------------- - * - * SquareDestroy -- - * - * This procedure is invoked by Tcl_EventuallyFree or Tcl_Release - * to clean up the internal structure of a square at a safe time - * (when no-one is using it anymore). - * - * Results: - * None. - * - * Side effects: - * Everything associated with the square is freed up. - * - *---------------------------------------------------------------------- - */ - -static void -SquareDestroy(memPtr) - char *memPtr; /* Info about square widget. */ -{ - Square *squarePtr = (Square *) memPtr; - - ckfree((char *) squarePtr); -} - -/* - *---------------------------------------------------------------------- - * - * KeepInWindow -- - * - * Adjust the position of the square if necessary to keep it in - * the widget's window. - * - * Results: - * None. - * - * Side effects: - * The x and y position of the square are adjusted if necessary - * to keep the square in the window. - * - *---------------------------------------------------------------------- - */ - -static void -KeepInWindow(squarePtr) - register Square *squarePtr; /* Pointer to widget record. */ -{ - int i, bd, relief; - int borderWidth, size; - - Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->borderWidthPtr, - &borderWidth); - Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->xPtr, - &squarePtr->x); - Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->yPtr, - &squarePtr->y); - Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->sizeObjPtr, &size); - Tk_GetReliefFromObj(NULL, squarePtr->reliefPtr, &relief); - bd = 0; - if (relief != TK_RELIEF_FLAT) { - bd = borderWidth; - } - i = (Tk_Width(squarePtr->tkwin) - bd) - (squarePtr->x + size); - if (i < 0) { - squarePtr->x += i; - } - i = (Tk_Height(squarePtr->tkwin) - bd) - (squarePtr->y + size); - if (i < 0) { - squarePtr->y += i; - } - if (squarePtr->x < bd) { - squarePtr->x = bd; - } - if (squarePtr->y < bd) { - squarePtr->y = bd; - } -} |