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tkMenubutton.c
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1998-08-07
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/*
* tkMenubutton.c --
*
* This module implements button-like widgets that are used
* to invoke pull-down menus.
*
* Copyright (c) 1990-1994 The Regents of the University of California.
* Copyright (c) 1994-1995 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* SCCS: @(#) tkMenubutton.c 1.77 96/02/15 18:52:22
*/
#include "tkPort.h"
#include "default.h"
#include "tkInt.h"
/*
* A data structure of the following type is kept for each
* widget managed by this file:
*/
typedef struct {
Tk_Window tkwin; /* Window that embodies the widget. NULL
* means that the window has been destroyed
* but the data structures haven't yet been
* cleaned up.*/
Display *display; /* Display containing widget. Needed, among
* other things, so that resources can bee
* freed up even after tkwin has gone away. */
Tcl_Interp *interp; /* Interpreter associated with menubutton. */
Tcl_Command widgetCmd; /* Token for menubutton's widget command. */
char *menuName; /* Name of menu associated with widget.
* Malloc-ed. */
/*
* Information about what's displayed in the menu button:
*/
char *text; /* Text to display in button (malloc'ed)
* or NULL. */
int numChars; /* # of characters in text. */
int underline; /* Index of character to underline. */
char *textVarName; /* Name of variable (malloc'ed) or NULL.
* If non-NULL, button displays the contents
* of this variable. */
Pixmap bitmap; /* Bitmap to display or None. If not None
* then text and textVar and underline
* are ignored. */
char *imageString; /* Name of image to display (malloc'ed), or
* NULL. If non-NULL, bitmap, text, and
* textVarName are ignored. */
Tk_Image image; /* Image to display in window, or NULL if
* none. */
/*
* Information used when displaying widget:
*/
Tk_Uid state; /* State of button for display purposes:
* normal, active, or disabled. */
Tk_3DBorder normalBorder; /* Structure used to draw 3-D
* border and background when window
* isn't active. NULL means no such
* border exists. */
Tk_3DBorder activeBorder; /* Structure used to draw 3-D
* border and background when window
* is active. NULL means no such
* border exists. */
int borderWidth; /* Width of border. */
int relief; /* 3-d effect: TK_RELIEF_RAISED, etc. */
int highlightWidth; /* Width in pixels of highlight to draw
* around widget when it has the focus.
* <= 0 means don't draw a highlight. */
XColor *highlightBgColorPtr;
/* Color for drawing traversal highlight
* area when highlight is off. */
XColor *highlightColorPtr; /* Color for drawing traversal highlight. */
int inset; /* Total width of all borders, including
* traversal highlight and 3-D border.
* Indicates how much interior stuff must
* be offset from outside edges to leave
* room for borders. */
XFontStruct *fontPtr; /* Information about text font, or NULL. */
XColor *normalFg; /* Foreground color in normal mode. */
XColor *activeFg; /* Foreground color in active mode. NULL
* means use normalFg instead. */
XColor *disabledFg; /* Foreground color when disabled. NULL
* means use normalFg with a 50% stipple
* instead. */
GC normalTextGC; /* GC for drawing text in normal mode. */
GC activeTextGC; /* GC for drawing text in active mode (NULL
* means use normalTextGC). */
Pixmap gray; /* Pixmap for displaying disabled text/icon if
* disabledFg is NULL. */
GC disabledGC; /* Used to produce disabled effect. If
* disabledFg isn't NULL, this GC is used to
* draw button text or icon. Otherwise
* text or icon is drawn with normalGC and
* this GC is used to stipple background
* across it. */
int leftBearing; /* Distance from text origin to leftmost drawn
* pixel (positive means to right). */
int rightBearing; /* Amount text sticks right from its origin. */
char *widthString; /* Value of -width option. Malloc'ed. */
char *heightString; /* Value of -height option. Malloc'ed. */
int width, height; /* If > 0, these specify dimensions to request
* for window, in characters for text and in
* pixels for bitmaps. In this case the actual
* size of the text string or bitmap is
* ignored in computing desired window size. */
int wrapLength; /* Line length (in pixels) at which to wrap
* onto next line. <= 0 means don't wrap
* except at newlines. */
int padX, padY; /* Extra space around text or bitmap (pixels
* on each side). */
Tk_Anchor anchor; /* Where text/bitmap should be displayed
* inside window region. */
Tk_Justify justify; /* Justification to use for multi-line text. */
int textWidth; /* Width needed to display text as requested,
* in pixels. */
int textHeight; /* Height needed to display text as requested,
* in pixels. */
int indicatorOn; /* Non-zero means display indicator; 0 means
* don't display. */
int indicatorHeight; /* Height of indicator in pixels. This same
* amount of extra space is also left on each
* side of the indicator. 0 if no indicator. */
int indicatorWidth; /* Width of indicator in pixels, including
* indicatorHeight in padding on each side.
* 0 if no indicator. */
/*
* Miscellaneous information:
*/
Tk_Cursor cursor; /* Current cursor for window, or None. */
char *takeFocus; /* Value of -takefocus option; not used in
* the C code, but used by keyboard traversal
* scripts. Malloc'ed, but may be NULL. */
int flags; /* Various flags; see below for
* definitions. */
} MenuButton;
/*
* Flag bits for buttons:
*
* REDRAW_PENDING: Non-zero means a DoWhenIdle handler
* has already been queued to redraw
* this window.
* POSTED: Non-zero means that the menu associated
* with this button has been posted (typically
* because of an active button press).
* GOT_FOCUS: Non-zero means this button currently
* has the input focus.
*/
#define REDRAW_PENDING 1
#define POSTED 2
#define GOT_FOCUS 4
/*
* The following constants define the dimensions of the cascade indicator,
* which is displayed if the "-indicatoron" option is true. The units for
* these options are 1/10 millimeters.
*/
#define INDICATOR_WIDTH 40
#define INDICATOR_HEIGHT 17
/*
* Information used for parsing configuration specs:
*/
static Tk_ConfigSpec configSpecs[] = {
{TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
DEF_MENUBUTTON_ACTIVE_BG_COLOR, Tk_Offset(MenuButton, activeBorder),
TK_CONFIG_COLOR_ONLY},
{TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
DEF_MENUBUTTON_ACTIVE_BG_MONO, Tk_Offset(MenuButton, activeBorder),
TK_CONFIG_MONO_ONLY},
{TK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
DEF_MENUBUTTON_ACTIVE_FG_COLOR, Tk_Offset(MenuButton, activeFg),
TK_CONFIG_COLOR_ONLY},
{TK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
DEF_MENUBUTTON_ACTIVE_FG_MONO, Tk_Offset(MenuButton, activeFg),
TK_CONFIG_MONO_ONLY},
{TK_CONFIG_ANCHOR, "-anchor", "anchor", "Anchor",
DEF_MENUBUTTON_ANCHOR, Tk_Offset(MenuButton, anchor), 0},
{TK_CONFIG_BORDER, "-background", "background", "Background",
DEF_MENUBUTTON_BG_COLOR, Tk_Offset(MenuButton, normalBorder),
TK_CONFIG_COLOR_ONLY},
{TK_CONFIG_BORDER, "-background", "background", "Background",
DEF_MENUBUTTON_BG_MONO, Tk_Offset(MenuButton, normalBorder),
TK_CONFIG_MONO_ONLY},
{TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
(char *) NULL, 0, 0},
{TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
(char *) NULL, 0, 0},
{TK_CONFIG_BITMAP, "-bitmap", "bitmap", "Bitmap",
DEF_MENUBUTTON_BITMAP, Tk_Offset(MenuButton, bitmap),
TK_CONFIG_NULL_OK},
{TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
DEF_MENUBUTTON_BORDER_WIDTH, Tk_Offset(MenuButton, borderWidth), 0},
{TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
DEF_MENUBUTTON_CURSOR, Tk_Offset(MenuButton, cursor),
TK_CONFIG_NULL_OK},
{TK_CONFIG_COLOR, "-disabledforeground", "disabledForeground",
"DisabledForeground", DEF_MENUBUTTON_DISABLED_FG_COLOR,
Tk_Offset(MenuButton, disabledFg),
TK_CONFIG_COLOR_ONLY|TK_CONFIG_NULL_OK},
{TK_CONFIG_COLOR, "-disabledforeground", "disabledForeground",
"DisabledForeground", DEF_MENUBUTTON_DISABLED_FG_MONO,
Tk_Offset(MenuButton, disabledFg),
TK_CONFIG_MONO_ONLY|TK_CONFIG_NULL_OK},
{TK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
(char *) NULL, 0, 0},
{TK_CONFIG_FONT, "-font", "font", "Font",
DEF_MENUBUTTON_FONT, Tk_Offset(MenuButton, fontPtr), 0},
{TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
DEF_MENUBUTTON_FG, Tk_Offset(MenuButton, normalFg), 0},
{TK_CONFIG_STRING, "-height", "height", "Height",
DEF_MENUBUTTON_HEIGHT, Tk_Offset(MenuButton, heightString), 0},
{TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
"HighlightBackground", DEF_MENUBUTTON_HIGHLIGHT_BG,
Tk_Offset(MenuButton, highlightBgColorPtr), 0},
{TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
DEF_MENUBUTTON_HIGHLIGHT, Tk_Offset(MenuButton, highlightColorPtr), 0},
{TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
"HighlightThickness", DEF_MENUBUTTON_HIGHLIGHT_WIDTH,
Tk_Offset(MenuButton, highlightWidth), 0},
{TK_CONFIG_STRING, "-image", "image", "Image",
DEF_MENUBUTTON_IMAGE, Tk_Offset(MenuButton, imageString),
TK_CONFIG_NULL_OK},
{TK_CONFIG_BOOLEAN, "-indicatoron", "indicatorOn", "IndicatorOn",
DEF_MENUBUTTON_INDICATOR, Tk_Offset(MenuButton, indicatorOn), 0},
{TK_CONFIG_JUSTIFY, "-justify", "justify", "Justify",
DEF_MENUBUTTON_JUSTIFY, Tk_Offset(MenuButton, justify), 0},
{TK_CONFIG_STRING, "-menu", "menu", "Menu",
DEF_MENUBUTTON_MENU, Tk_Offset(MenuButton, menuName),
TK_CONFIG_NULL_OK},
{TK_CONFIG_PIXELS, "-padx", "padX", "Pad",
DEF_MENUBUTTON_PADX, Tk_Offset(MenuButton, padX), 0},
{TK_CONFIG_PIXELS, "-pady", "padY", "Pad",
DEF_MENUBUTTON_PADY, Tk_Offset(MenuButton, padY), 0},
{TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
DEF_MENUBUTTON_RELIEF, Tk_Offset(MenuButton, relief), 0},
{TK_CONFIG_UID, "-state", "state", "State",
DEF_MENUBUTTON_STATE, Tk_Offset(MenuButton, state), 0},
{TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
DEF_MENUBUTTON_TAKE_FOCUS, Tk_Offset(MenuButton, takeFocus),
TK_CONFIG_NULL_OK},
{TK_CONFIG_STRING, "-text", "text", "Text",
DEF_MENUBUTTON_TEXT, Tk_Offset(MenuButton, text), 0},
{TK_CONFIG_STRING, "-textvariable", "textVariable", "Variable",
DEF_MENUBUTTON_TEXT_VARIABLE, Tk_Offset(MenuButton, textVarName),
TK_CONFIG_NULL_OK},
{TK_CONFIG_INT, "-underline", "underline", "Underline",
DEF_MENUBUTTON_UNDERLINE, Tk_Offset(MenuButton, underline), 0},
{TK_CONFIG_STRING, "-width", "width", "Width",
DEF_MENUBUTTON_WIDTH, Tk_Offset(MenuButton, widthString), 0},
{TK_CONFIG_PIXELS, "-wraplength", "wrapLength", "WrapLength",
DEF_MENUBUTTON_WRAP_LENGTH, Tk_Offset(MenuButton, wrapLength), 0},
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
(char *) NULL, 0, 0}
};
/*
* Forward declarations for procedures defined later in this file:
*/
static void ComputeMenuButtonGeometry _ANSI_ARGS_((
MenuButton *mbPtr));
static void MenuButtonCmdDeletedProc _ANSI_ARGS_((
ClientData clientData));
static void MenuButtonEventProc _ANSI_ARGS_((ClientData clientData,
XEvent *eventPtr));
static void MenuButtonImageProc _ANSI_ARGS_((ClientData clientData,
int x, int y, int width, int height, int imgWidth,
int imgHeight));
static char * MenuButtonTextVarProc _ANSI_ARGS_((
ClientData clientData, Tcl_Interp *interp,
char *name1, char *name2, int flags));
static int MenuButtonWidgetCmd _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, char **argv));
static int ConfigureMenuButton _ANSI_ARGS_((Tcl_Interp *interp,
MenuButton *mbPtr, int argc, char **argv,
int flags));
static void DestroyMenuButton _ANSI_ARGS_((char *memPtr));
static void DisplayMenuButton _ANSI_ARGS_((ClientData clientData));
/*
*--------------------------------------------------------------
*
* Tk_MenubuttonCmd --
*
* This procedure is invoked to process the "button", "label",
* "radiobutton", and "checkbutton" Tcl commands. See the
* user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*--------------------------------------------------------------
*/
int
Tk_MenubuttonCmd(clientData, interp, argc, argv)
ClientData clientData; /* Main window associated with
* interpreter. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
register MenuButton *mbPtr;
Tk_Window tkwin = (Tk_Window) clientData;
Tk_Window new;
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " pathName ?options?\"", (char *) NULL);
return TCL_ERROR;
}
/*
* Create the new window.
*/
new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL);
if (new == NULL) {
return TCL_ERROR;
}
/*
* Initialize the data structure for the button.
*/
mbPtr = (MenuButton *) ckalloc(sizeof(MenuButton));
mbPtr->tkwin = new;
mbPtr->display = Tk_Display (new);
mbPtr->interp = interp;
mbPtr->widgetCmd = Tcl_CreateCommand(interp, Tk_PathName(mbPtr->tkwin),
MenuButtonWidgetCmd, (ClientData) mbPtr, MenuButtonCmdDeletedProc);
mbPtr->menuName = NULL;
mbPtr->text = NULL;
mbPtr->numChars = 0;
mbPtr->underline = -1;
mbPtr->textVarName = NULL;
mbPtr->bitmap = None;
mbPtr->imageString = NULL;
mbPtr->image = NULL;
mbPtr->state = tkNormalUid;
mbPtr->normalBorder = NULL;
mbPtr->activeBorder = NULL;
mbPtr->borderWidth = 0;
mbPtr->relief = TK_RELIEF_FLAT;
mbPtr->highlightWidth = 0;
mbPtr->highlightBgColorPtr = NULL;
mbPtr->highlightColorPtr = NULL;
mbPtr->inset = 0;
mbPtr->fontPtr = NULL;
mbPtr->normalFg = NULL;
mbPtr->activeFg = NULL;
mbPtr->disabledFg = NULL;
mbPtr->normalTextGC = None;
mbPtr->activeTextGC = None;
mbPtr->gray = None;
mbPtr->disabledGC = None;
mbPtr->leftBearing = 0;
mbPtr->rightBearing = 0;
mbPtr->widthString = NULL;
mbPtr->heightString = NULL;
mbPtr->width = 0;
mbPtr->width = 0;
mbPtr->wrapLength = 0;
mbPtr->padX = 0;
mbPtr->padY = 0;
mbPtr->anchor = TK_ANCHOR_CENTER;
mbPtr->justify = TK_JUSTIFY_CENTER;
mbPtr->indicatorOn = 0;
mbPtr->indicatorWidth = 0;
mbPtr->indicatorHeight = 0;
mbPtr->cursor = None;
mbPtr->takeFocus = NULL;
mbPtr->flags = 0;
Tk_SetClass(mbPtr->tkwin, "Menubutton");
Tk_CreateEventHandler(mbPtr->tkwin,
ExposureMask|StructureNotifyMask|FocusChangeMask,
MenuButtonEventProc, (ClientData) mbPtr);
if (ConfigureMenuButton(interp, mbPtr, argc-2, argv+2, 0) != TCL_OK) {
Tk_DestroyWindow(mbPtr->tkwin);
return TCL_ERROR;
}
interp->result = Tk_PathName(mbPtr->tkwin);
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* MenuButtonWidgetCmd --
*
* 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
MenuButtonWidgetCmd(clientData, interp, argc, argv)
ClientData clientData; /* Information about button widget. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
register MenuButton *mbPtr = (MenuButton *) clientData;
int result = TCL_OK;
size_t length;
int c;
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" option ?arg arg ...?\"", (char *) NULL);
return TCL_ERROR;
}
Tcl_Preserve((ClientData) mbPtr);
c = argv[1][0];
length = strlen(argv[1]);
if ((c == 'c') && (strncmp(argv[1], "cget", length) == 0)
&& (length >= 2)) {
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " cget option\"",
(char *) NULL);
goto error;
}
result = Tk_ConfigureValue(interp, mbPtr->tkwin, configSpecs,
(char *) mbPtr, argv[2], 0);
} else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
&& (length >= 2)) {
if (argc == 2) {
result = Tk_ConfigureInfo(interp, mbPtr->tkwin, configSpecs,
(char *) mbPtr, (char *) NULL, 0);
} else if (argc == 3) {
result = Tk_ConfigureInfo(interp, mbPtr->tkwin, configSpecs,
(char *) mbPtr, argv[2], 0);
} else {
result = ConfigureMenuButton(interp, mbPtr, argc-2, argv+2,
TK_CONFIG_ARGV_ONLY);
}
} else {
Tcl_AppendResult(interp, "bad option \"", argv[1],
"\": must be cget or configure",
(char *) NULL);
goto error;
}
Tcl_Release((ClientData) mbPtr);
return result;
error:
Tcl_Release((ClientData) mbPtr);
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* DestroyMenuButton --
*
* This procedure is invoked to recycle all of the resources
* associated with a button widget. It is invoked as a
* when-idle handler in order to make sure that there is no
* other use of the button pending at the time of the deletion.
*
* Results:
* None.
*
* Side effects:
* Everything associated with the widget is freed up.
*
*----------------------------------------------------------------------
*/
static void
DestroyMenuButton(memPtr)
char *memPtr; /* Info about button widget. */
{
register MenuButton *mbPtr = (MenuButton *) memPtr;
/*
* Free up all the stuff that requires special handling, then
* let Tk_FreeOptions handle all the standard option-related
* stuff.
*/
if (mbPtr->textVarName != NULL) {
Tcl_UntraceVar(mbPtr->interp, mbPtr->textVarName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
MenuButtonTextVarProc, (ClientData) mbPtr);
}
if (mbPtr->image != NULL) {
Tk_FreeImage(mbPtr->image);
}
if (mbPtr->normalTextGC != None) {
Tk_FreeGC(mbPtr->display, mbPtr->normalTextGC);
}
if (mbPtr->activeTextGC != None) {
Tk_FreeGC(mbPtr->display, mbPtr->activeTextGC);
}
if (mbPtr->gray != None) {
Tk_FreeBitmap(mbPtr->display, mbPtr->gray);
}
if (mbPtr->disabledGC != None) {
Tk_FreeGC(mbPtr->display, mbPtr->disabledGC);
}
Tk_FreeOptions(configSpecs, (char *) mbPtr, mbPtr->display, 0);
ckfree((char *) mbPtr);
}
/*
*----------------------------------------------------------------------
*
* ConfigureMenuButton --
*
* This procedure is called to process an argv/argc list, plus
* the Tk option database, in order to configure (or
* reconfigure) a menubutton widget.
*
* Results:
* The return value is a standard Tcl result. If TCL_ERROR is
* returned, then interp->result contains an error message.
*
* Side effects:
* Configuration information, such as text string, colors, font,
* etc. get set for mbPtr; old resources get freed, if there
* were any. The menubutton is redisplayed.
*
*----------------------------------------------------------------------
*/
static int
ConfigureMenuButton(interp, mbPtr, argc, argv, flags)
Tcl_Interp *interp; /* Used for error reporting. */
register MenuButton *mbPtr; /* Information about widget; may or may
* not already have values for some fields. */
int argc; /* Number of valid entries in argv. */
char **argv; /* Arguments. */
int flags; /* Flags to pass to Tk_ConfigureWidget. */
{
XGCValues gcValues;
GC newGC;
unsigned long mask;
int result;
Tk_Image image;
/*
* Eliminate any existing trace on variables monitored by the menubutton.
*/
if (mbPtr->textVarName != NULL) {
Tcl_UntraceVar(interp, mbPtr->textVarName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
MenuButtonTextVarProc, (ClientData) mbPtr);
}
result = Tk_ConfigureWidget(interp, mbPtr->tkwin, configSpecs,
argc, argv, (char *) mbPtr, flags);
if (result != TCL_OK) {
return TCL_ERROR;
}
/*
* A few options need special processing, such as setting the
* background from a 3-D border, or filling in complicated
* defaults that couldn't be specified to Tk_ConfigureWidget.
*/
if ((mbPtr->state == tkActiveUid) && !Tk_StrictMotif(mbPtr->tkwin)) {
Tk_SetBackgroundFromBorder(mbPtr->tkwin, mbPtr->activeBorder);
} else {
Tk_SetBackgroundFromBorder(mbPtr->tkwin, mbPtr->normalBorder);
if ((mbPtr->state != tkNormalUid) && (mbPtr->state != tkActiveUid)
&& (mbPtr->state != tkDisabledUid)) {
Tcl_AppendResult(interp, "bad state value \"", mbPtr->state,
"\": must be normal, active, or disabled", (char *) NULL);
mbPtr->state = tkNormalUid;
return TCL_ERROR;
}
}
if (mbPtr->highlightWidth < 0) {
mbPtr->highlightWidth = 0;
}
gcValues.font = mbPtr->fontPtr->fid;
gcValues.foreground = mbPtr->normalFg->pixel;
gcValues.background = Tk_3DBorderColor(mbPtr->normalBorder)->pixel;
/*
* Note: GraphicsExpose events are disabled in GC's because they're
* used to copy stuff from an off-screen pixmap onto the screen (we know
* that there's no problem with obscured areas).
*/
gcValues.graphics_exposures = False;
newGC = Tk_GetGC(mbPtr->tkwin,
GCForeground|GCBackground|GCFont|GCGraphicsExposures, &gcValues);
if (mbPtr->normalTextGC != None) {
Tk_FreeGC(mbPtr->display, mbPtr->normalTextGC);
}
mbPtr->normalTextGC = newGC;
gcValues.font = mbPtr->fontPtr->fid;
gcValues.foreground = mbPtr->activeFg->pixel;
gcValues.background = Tk_3DBorderColor(mbPtr->activeBorder)->pixel;
newGC = Tk_GetGC(mbPtr->tkwin, GCForeground|GCBackground|GCFont,
&gcValues);
if (mbPtr->activeTextGC != None) {
Tk_FreeGC(mbPtr->display, mbPtr->activeTextGC);
}
mbPtr->activeTextGC = newGC;
gcValues.font = mbPtr->fontPtr->fid;
gcValues.background = Tk_3DBorderColor(mbPtr->normalBorder)->pixel;
if ((mbPtr->disabledFg != NULL) && (mbPtr->imageString == NULL)) {
gcValues.foreground = mbPtr->disabledFg->pixel;
mask = GCForeground|GCBackground|GCFont;
} else {
gcValues.foreground = gcValues.background;
if (mbPtr->gray == None) {
mbPtr->gray = Tk_GetBitmap(interp, mbPtr->tkwin,
Tk_GetUid("gray50"));
if (mbPtr->gray == None) {
return TCL_ERROR;
}
}
gcValues.fill_style = FillStippled;
gcValues.stipple = mbPtr->gray;
mask = GCForeground|GCFillStyle|GCStipple;
}
newGC = Tk_GetGC(mbPtr->tkwin, mask, &gcValues);
if (mbPtr->disabledGC != None) {
Tk_FreeGC(mbPtr->display, mbPtr->disabledGC);
}
mbPtr->disabledGC = newGC;
if (mbPtr->padX < 0) {
mbPtr->padX = 0;
}
if (mbPtr->padY < 0) {
mbPtr->padY = 0;
}
/*
* Get the image for the widget, if there is one. Allocate the
* new image before freeing the old one, so that the reference
* count doesn't go to zero and cause image data to be discarded.
*/
if (mbPtr->imageString != NULL) {
image = Tk_GetImage(mbPtr->interp, mbPtr->tkwin,
mbPtr->imageString, MenuButtonImageProc, (ClientData) mbPtr);
if (image == NULL) {
return TCL_ERROR;
}
} else {
image = NULL;
}
if (mbPtr->image != NULL) {
Tk_FreeImage(mbPtr->image);
}
mbPtr->image = image;
if ((mbPtr->image == NULL) && (mbPtr->bitmap == None)
&& (mbPtr->textVarName != NULL)) {
/*
* The menubutton displays a variable. Set up a trace to watch
* for any changes in it.
*/
char *value;
value = Tcl_GetVar(interp, mbPtr->textVarName, TCL_GLOBAL_ONLY);
if (value == NULL) {
Tcl_SetVar(interp, mbPtr->textVarName, mbPtr->text,
TCL_GLOBAL_ONLY);
} else {
if (mbPtr->text != NULL) {
ckfree(mbPtr->text);
}
mbPtr->text = (char *) ckalloc((unsigned) (strlen(value) + 1));
strcpy(mbPtr->text, value);
}
Tcl_TraceVar(interp, mbPtr->textVarName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
MenuButtonTextVarProc, (ClientData) mbPtr);
}
/*
* Recompute the geometry for the button.
*/
if ((mbPtr->bitmap != None) || (mbPtr->image != NULL)) {
if (Tk_GetPixels(interp, mbPtr->tkwin, mbPtr->widthString,
&mbPtr->width) != TCL_OK) {
widthError:
Tcl_AddErrorInfo(interp, "\n (processing -width option)");
return TCL_ERROR;
}
if (Tk_GetPixels(interp, mbPtr->tkwin, mbPtr->heightString,
&mbPtr->height) != TCL_OK) {
heightError:
Tcl_AddErrorInfo(interp, "\n (processing -height option)");
return TCL_ERROR;
}
} else {
if (Tcl_GetInt(interp, mbPtr->widthString, &mbPtr->width)
!= TCL_OK) {
goto widthError;
}
if (Tcl_GetInt(interp, mbPtr->heightString, &mbPtr->height)
!= TCL_OK) {
goto heightError;
}
}
ComputeMenuButtonGeometry(mbPtr);
/*
* Lastly, arrange for the button to be redisplayed.
*/
if (Tk_IsMapped(mbPtr->tkwin) && !(mbPtr->flags & REDRAW_PENDING)) {
Tcl_DoWhenIdle(DisplayMenuButton, (ClientData) mbPtr);
mbPtr->flags |= REDRAW_PENDING;
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* DisplayMenuButton --
*
* This procedure is invoked to display a menubutton widget.
*
* Results:
* None.
*
* Side effects:
* Commands are output to X to display the menubutton in its
* current mode.
*
*----------------------------------------------------------------------
*/
static void
DisplayMenuButton(clientData)
ClientData clientData; /* Information about widget. */
{
register MenuButton *mbPtr = (MenuButton *) clientData;
GC gc;
Tk_3DBorder border;
Pixmap pixmap;
int x = 0; /* Initialization needed only to stop
* compiler warning. */
int y;
register Tk_Window tkwin = mbPtr->tkwin;
int width, height;
mbPtr->flags &= ~REDRAW_PENDING;
if ((mbPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
return;
}
if ((mbPtr->state == tkDisabledUid) && (mbPtr->disabledFg != NULL)) {
gc = mbPtr->disabledGC;
border = mbPtr->normalBorder;
} else if ((mbPtr->state == tkActiveUid) && !Tk_StrictMotif(mbPtr->tkwin)) {
gc = mbPtr->activeTextGC;
border = mbPtr->activeBorder;
} else {
gc = mbPtr->normalTextGC;
border = mbPtr->normalBorder;
}
/*
* In order to avoid screen flashes, this procedure redraws
* the menu button in a pixmap, then copies the pixmap to the
* screen in a single operation. This means that there's no
* point in time where the on-sreen image has been cleared.
*/
pixmap = Tk_GetPixmap(mbPtr->display, Tk_WindowId(tkwin),
Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin));
Tk_Fill3DRectangle(tkwin, pixmap, border, 0, 0, Tk_Width(tkwin),
Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
/*
* Display image or bitmap or text for button.
*/
if (mbPtr->image != None) {
Tk_SizeOfImage(mbPtr->image, &width, &height);
imageOrBitmap:
switch (mbPtr->anchor) {
case TK_ANCHOR_NW: case TK_ANCHOR_W: case TK_ANCHOR_SW:
x += mbPtr->inset;
break;
case TK_ANCHOR_N: case TK_ANCHOR_CENTER: case TK_ANCHOR_S:
x += ((int) (Tk_Width(tkwin) - width
- mbPtr->indicatorWidth))/2;
break;
default:
x += Tk_Width(tkwin) - mbPtr->inset - width
- mbPtr->indicatorWidth;
break;
}
switch (mbPtr->anchor) {
case TK_ANCHOR_NW: case TK_ANCHOR_N: case TK_ANCHOR_NE:
y = mbPtr->inset;
break;
case TK_ANCHOR_W: case TK_ANCHOR_CENTER: case TK_ANCHOR_E:
y = ((int) (Tk_Height(tkwin) - height))/2;
break;
default:
y = Tk_Height(tkwin) - mbPtr->inset - height;
break;
}
if (mbPtr->image != NULL) {
Tk_RedrawImage(mbPtr->image, 0, 0, width, height, pixmap,
x, y);
} else {
XCopyPlane(mbPtr->display, mbPtr->bitmap, pixmap,
gc, 0, 0, (unsigned) width, (unsigned) height, x, y, 1);
}
} else if (mbPtr->bitmap != None) {
Tk_SizeOfBitmap(mbPtr->display, mbPtr->bitmap, &width, &height);
goto imageOrBitmap;
} else {
width = mbPtr->textWidth;
height = mbPtr->textHeight;
switch (mbPtr->anchor) {
case TK_ANCHOR_NW: case TK_ANCHOR_W: case TK_ANCHOR_SW:
x = mbPtr->inset + mbPtr->padX;
break;
case TK_ANCHOR_N: case TK_ANCHOR_CENTER: case TK_ANCHOR_S:
x = ((int) (Tk_Width(tkwin) - width
- mbPtr->indicatorWidth))/2;
break;
default:
x = Tk_Width(tkwin) - width - mbPtr->padX - mbPtr->inset
- mbPtr->indicatorWidth;
break;
}
switch (mbPtr->anchor) {
case TK_ANCHOR_NW: case TK_ANCHOR_N: case TK_ANCHOR_NE:
y = mbPtr->inset + mbPtr->padY;
break;
case TK_ANCHOR_W: case TK_ANCHOR_CENTER: case TK_ANCHOR_E:
y = ((int) (Tk_Height(tkwin) - height))/2;
break;
default:
y = Tk_Height(tkwin) - mbPtr->inset - mbPtr->padY - height;
break;
}
TkDisplayText(mbPtr->display, pixmap, mbPtr->fontPtr,
mbPtr->text, mbPtr->numChars, x, y, mbPtr->textWidth,
mbPtr->justify, mbPtr->underline, gc);
}
/*
* If the menu button is disabled with a stipple rather than a special
* foreground color, generate the stippled effect.
*/
if ((mbPtr->state == tkDisabledUid)
&& ((mbPtr->disabledFg == NULL) || (mbPtr->image != NULL))) {
XFillRectangle(mbPtr->display, pixmap, mbPtr->disabledGC,
mbPtr->inset, mbPtr->inset,
(unsigned) (Tk_Width(tkwin) - 2*mbPtr->inset),
(unsigned) (Tk_Height(tkwin) - 2*mbPtr->inset));
}
/*
* Draw the cascade indicator for the menu button on the
* right side of the window, if desired.
*/
if (mbPtr->indicatorOn) {
int borderWidth;
borderWidth = (mbPtr->indicatorHeight+1)/3;
if (borderWidth < 1) {
borderWidth = 1;
}
Tk_Fill3DRectangle(tkwin, pixmap, border,
Tk_Width(tkwin) - mbPtr->inset - mbPtr->indicatorWidth
+ mbPtr->indicatorHeight,
y + ((int) (height - mbPtr->indicatorHeight))/2,
mbPtr->indicatorWidth - 2*mbPtr->indicatorHeight,
mbPtr->indicatorHeight, borderWidth, TK_RELIEF_RAISED);
}
/*
* Draw the border and traversal highlight last. This way, if the
* menu button's contents overflow onto the border they'll be covered
* up by the border.
*/
if (mbPtr->relief != TK_RELIEF_FLAT) {
Tk_Draw3DRectangle(tkwin, pixmap, border,
mbPtr->highlightWidth, mbPtr->highlightWidth,
Tk_Width(tkwin) - 2*mbPtr->highlightWidth,
Tk_Height(tkwin) - 2*mbPtr->highlightWidth,
mbPtr->borderWidth, mbPtr->relief);
}
if (mbPtr->highlightWidth != 0) {
GC gc;
if (mbPtr->flags & GOT_FOCUS) {
gc = Tk_GCForColor(mbPtr->highlightColorPtr, pixmap);
} else {
gc = Tk_GCForColor(mbPtr->highlightBgColorPtr, pixmap);
}
Tk_DrawFocusHighlight(tkwin, gc, mbPtr->highlightWidth, pixmap);
}
/*
* Copy the information from the off-screen pixmap onto the screen,
* then delete the pixmap.
*/
XCopyArea(mbPtr->display, pixmap, Tk_WindowId(tkwin),
mbPtr->normalTextGC, 0, 0, (unsigned) Tk_Width(tkwin),
(unsigned) Tk_Height(tkwin), 0, 0);
Tk_FreePixmap(mbPtr->display, pixmap);
}
/*
*--------------------------------------------------------------
*
* MenuButtonEventProc --
*
* This procedure is invoked by the Tk dispatcher for various
* events on buttons.
*
* Results:
* None.
*
* Side effects:
* When the window gets deleted, internal structures get
* cleaned up. When it gets exposed, it is redisplayed.
*
*--------------------------------------------------------------
*/
static void
MenuButtonEventProc(clientData, eventPtr)
ClientData clientData; /* Information about window. */
XEvent *eventPtr; /* Information about event. */
{
MenuButton *mbPtr = (MenuButton *) clientData;
if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) {
goto redraw;
} else if (eventPtr->type == ConfigureNotify) {
/*
* Must redraw after size changes, since layout could have changed
* and borders will need to be redrawn.
*/
goto redraw;
} else if (eventPtr->type == DestroyNotify) {
if (mbPtr->tkwin != NULL) {
mbPtr->tkwin = NULL;
Tcl_DeleteCommand(mbPtr->interp,
Tcl_GetCommandName(mbPtr->interp, mbPtr->widgetCmd));
}
if (mbPtr->flags & REDRAW_PENDING) {
Tcl_CancelIdleCall(DisplayMenuButton, (ClientData) mbPtr);
}
Tcl_EventuallyFree((ClientData) mbPtr, DestroyMenuButton);
} else if (eventPtr->type == FocusIn) {
if (eventPtr->xfocus.detail != NotifyInferior) {
mbPtr->flags |= GOT_FOCUS;
if (mbPtr->highlightWidth > 0) {
goto redraw;
}
}
} else if (eventPtr->type == FocusOut) {
if (eventPtr->xfocus.detail != NotifyInferior) {
mbPtr->flags &= ~GOT_FOCUS;
if (mbPtr->highlightWidth > 0) {
goto redraw;
}
}
}
return;
redraw:
if ((mbPtr->tkwin != NULL) && !(mbPtr->flags & REDRAW_PENDING)) {
Tcl_DoWhenIdle(DisplayMenuButton, (ClientData) mbPtr);
mbPtr->flags |= REDRAW_PENDING;
}
}
/*
*----------------------------------------------------------------------
*
* MenuButtonCmdDeletedProc --
*
* 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
MenuButtonCmdDeletedProc(clientData)
ClientData clientData; /* Pointer to widget record for widget. */
{
MenuButton *mbPtr = (MenuButton *) clientData;
Tk_Window tkwin = mbPtr->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) {
mbPtr->tkwin = NULL;
Tk_DestroyWindow(tkwin);
}
}
/*
*----------------------------------------------------------------------
*
* ComputeMenuButtonGeometry --
*
* After changes in a menu button's text or bitmap, this procedure
* recomputes the menu button's geometry and passes this information
* along to the geometry manager for the window.
*
* Results:
* None.
*
* Side effects:
* The menu button's window may change size.
*
*----------------------------------------------------------------------
*/
static void
ComputeMenuButtonGeometry(mbPtr)
register MenuButton *mbPtr; /* Widget record for menu button. */
{
int width, height, mm, pixels;
mbPtr->inset = mbPtr->highlightWidth + mbPtr->borderWidth;
if (mbPtr->image != None) {
Tk_SizeOfImage(mbPtr->image, &width, &height);
if (mbPtr->width > 0) {
width = mbPtr->width;
}
if (mbPtr->height > 0) {
height = mbPtr->height;
}
} else if (mbPtr->bitmap != None) {
Tk_SizeOfBitmap(mbPtr->display, mbPtr->bitmap, &width, &height);
if (mbPtr->width > 0) {
width = mbPtr->width;
}
if (mbPtr->height > 0) {
height = mbPtr->height;
}
} else {
mbPtr->numChars = strlen(mbPtr->text);
TkComputeTextGeometry(mbPtr->fontPtr, mbPtr->text,
mbPtr->numChars, mbPtr->wrapLength, &mbPtr->textWidth,
&mbPtr->textHeight);
width = mbPtr->textWidth;
height = mbPtr->textHeight;
if (mbPtr->width > 0) {
width = mbPtr->width * XTextWidth(mbPtr->fontPtr, "0", 1);
}
if (mbPtr->height > 0) {
height = mbPtr->height * (mbPtr->fontPtr->ascent
+ mbPtr->fontPtr->descent);
}
width += 2*mbPtr->padX;
height += 2*mbPtr->padY;
}
if (mbPtr->indicatorOn) {
mm = WidthMMOfScreen(Tk_Screen(mbPtr->tkwin));
pixels = WidthOfScreen(Tk_Screen(mbPtr->tkwin));
mbPtr->indicatorHeight= (INDICATOR_HEIGHT * pixels)/(10*mm);
mbPtr->indicatorWidth = (INDICATOR_WIDTH * pixels)/(10*mm)
+ 2*mbPtr->indicatorHeight;
width += mbPtr->indicatorWidth;
} else {
mbPtr->indicatorHeight = 0;
mbPtr->indicatorWidth = 0;
}
Tk_GeometryRequest(mbPtr->tkwin, (int) (width + 2*mbPtr->inset),
(int) (height + 2*mbPtr->inset));
Tk_SetInternalBorder(mbPtr->tkwin, mbPtr->inset);
}
/*
*--------------------------------------------------------------
*
* MenuButtonTextVarProc --
*
* This procedure is invoked when someone changes the variable
* whose contents are to be displayed in a menu button.
*
* Results:
* NULL is always returned.
*
* Side effects:
* The text displayed in the menu button will change to match the
* variable.
*
*--------------------------------------------------------------
*/
/* ARGSUSED */
static char *
MenuButtonTextVarProc(clientData, interp, name1, name2, flags)
ClientData clientData; /* Information about button. */
Tcl_Interp *interp; /* Interpreter containing variable. */
char *name1; /* Name of variable. */
char *name2; /* Second part of variable name. */
int flags; /* Information about what happened. */
{
register MenuButton *mbPtr = (MenuButton *) clientData;
char *value;
/*
* If the variable is unset, then immediately recreate it unless
* the whole interpreter is going away.
*/
if (flags & TCL_TRACE_UNSETS) {
if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {
Tcl_SetVar(interp, mbPtr->textVarName, mbPtr->text,
TCL_GLOBAL_ONLY);
Tcl_TraceVar(interp, mbPtr->textVarName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
MenuButtonTextVarProc, clientData);
}
return (char *) NULL;
}
value = Tcl_GetVar(interp, mbPtr->textVarName, TCL_GLOBAL_ONLY);
if (value == NULL) {
value = "";
}
if (mbPtr->text != NULL) {
ckfree(mbPtr->text);
}
mbPtr->text = (char *) ckalloc((unsigned) (strlen(value) + 1));
strcpy(mbPtr->text, value);
ComputeMenuButtonGeometry(mbPtr);
if ((mbPtr->tkwin != NULL) && Tk_IsMapped(mbPtr->tkwin)
&& !(mbPtr->flags & REDRAW_PENDING)) {
Tcl_DoWhenIdle(DisplayMenuButton, (ClientData) mbPtr);
mbPtr->flags |= REDRAW_PENDING;
}
return (char *) NULL;
}
/*
*----------------------------------------------------------------------
*
* MenuButtonImageProc --
*
* This procedure is invoked by the image code whenever the manager
* for an image does something that affects the size of contents
* of an image displayed in a button.
*
* Results:
* None.
*
* Side effects:
* Arranges for the button to get redisplayed.
*
*----------------------------------------------------------------------
*/
static void
MenuButtonImageProc(clientData, x, y, width, height, imgWidth, imgHeight)
ClientData clientData; /* Pointer to widget record. */
int x, y; /* Upper left pixel (within image)
* that must be redisplayed. */
int width, height; /* Dimensions of area to redisplay
* (may be <= 0). */
int imgWidth, imgHeight; /* New dimensions of image. */
{
register MenuButton *mbPtr = (MenuButton *) clientData;
if (mbPtr->tkwin != NULL) {
ComputeMenuButtonGeometry(mbPtr);
if (Tk_IsMapped(mbPtr->tkwin) && !(mbPtr->flags & REDRAW_PENDING)) {
Tcl_DoWhenIdle(DisplayMenuButton, (ClientData) mbPtr);
mbPtr->flags |= REDRAW_PENDING;
}
}
}