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ckButton.c
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ckButton.c
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/*
* ckButton.c --
*
* This module implements a collection of button-like
* widgets for the Ck toolkit. The widgets implemented
* include labels, buttons, check buttons, and radio
* buttons.
*
* Copyright (c) 1990-1994 The Regents of the University of California.
* Copyright (c) 1994-1995 Sun Microsystems, Inc.
* Copyright (c) 1995 Christian Werner
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "ckPort.h"
#include "ck.h"
#include "default.h"
/*
* A data structure of the following type is kept for each
* widget managed by this file:
*/
typedef struct {
CkWindow *winPtr; /* Window that embodies the button. NULL
* means that the window has been destroyed. */
Tcl_Interp *interp; /* Interpreter associated with button. */
Tcl_Command widgetCmd; /* Token for button's widget command. */
int type; /* Type of widget: restricts operations
* that may be performed on widget. See
* below for possible values. */
/*
* Information about what's in the button.
*/
char *text; /* Text to display in button (malloc'ed)
* or NULL. */
int textLength; /* # of characters in text. */
char *textVarName; /* Name of variable (malloc'ed) or NULL.
* If non-NULL, button displays the contents
* of this variable. */
/*
* Information used when displaying widget:
*/
Ck_Uid state; /* State of button for display purposes:
* normal, active, or disabled. */
int normalFg; /* Foreground color in normal mode. */
int normalBg; /* Background color in normal mode. */
int normalAttr; /* Attributes in normal mode. */
int activeFg; /* Foreground color in active mode. */
int activeBg; /* Ditto, background color. */
int activeAttr; /* Attributes in active mode. */
int disabledBg; /* Background color when disabled. */
int disabledFg; /* Foreground color when disabled. */
int disabledAttr; /* Attributes when disabled. */
int underline; /* Index of underlined character, < 0 if
* no underlining. */
int underlineFg; /* Foreground for underlined character. */
int underlineAttr; /* Attribute for underlined character. */
int selectFg; /* Foreground color for selector. */
int width, height; /* If > 0, these specify dimensions to request
* for window, in characters for text. */
Ck_Anchor anchor; /* Where text should be displayed
* inside button region. */
/*
* For check and radio buttons, the fields below are used
* to manage the variable indicating the button's state.
*/
char *selVarName; /* Name of variable used to control selected
* state of button. Malloc'ed (if
* not NULL). */
char *onValue; /* Value to store in variable when
* this button is selected. Malloc'ed (if
* not NULL). */
char *offValue; /* Value to store in variable when this
* button isn't selected. Malloc'ed
* (if not NULL). Valid only for check
* buttons. */
/*
* Miscellaneous information:
*/
char *command; /* Command to execute when button is
* invoked; valid for buttons only.
* If not NULL, it's malloc-ed. */
char *takeFocus; /* Tk 4.0 like. */
int flags; /* Various flags; see below for
* definitions. */
} Button;
/*
* Possible "type" values for buttons. These are the kinds of
* widgets supported by this file. The ordering of the type
* numbers is significant: greater means more features and is
* used in the code.
*/
#define TYPE_LABEL 0
#define TYPE_BUTTON 1
#define TYPE_CHECK_BUTTON 2
#define TYPE_RADIO_BUTTON 3
/*
* Class names for buttons, indexed by one of the type values above.
*/
static char *classNames[] = {"Label", "Button", "Checkbutton", "Radiobutton"};
/*
* Flag bits for buttons:
*
* REDRAW_PENDING: Non-zero means a DoWhenIdle handler
* has already been queued to redraw
* this window.
* SELECTED: Non-zero means this button is selected,
* so special highlight should be drawn.
*/
#define REDRAW_PENDING 1
#define SELECTED 2
/*
* Mask values used to selectively enable entries in the
* configuration specs:
*/
#define LABEL_MASK CK_CONFIG_USER_BIT
#define BUTTON_MASK CK_CONFIG_USER_BIT << 1
#define CHECK_BUTTON_MASK CK_CONFIG_USER_BIT << 2
#define RADIO_BUTTON_MASK CK_CONFIG_USER_BIT << 3
#define ALL_MASK (LABEL_MASK | BUTTON_MASK \
| CHECK_BUTTON_MASK | RADIO_BUTTON_MASK)
static int configFlags[] = {LABEL_MASK, BUTTON_MASK,
CHECK_BUTTON_MASK, RADIO_BUTTON_MASK};
/*
* Information used for parsing configuration specs:
*/
static Ck_ConfigSpec configSpecs[] = {
{CK_CONFIG_ATTR, "-activeattributes", "activeAttributes",
"ActiveAttributes", DEF_BUTTON_ACTIVE_ATTR_COLOR,
Ck_Offset(Button, activeAttr),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_ATTR, "-activeattributes", "activeAttributes",
"ActiveAttributes", DEF_BUTTON_ACTIVE_ATTR_MONO,
Ck_Offset(Button, activeAttr),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_MONO_ONLY},
{CK_CONFIG_COLOR, "-activebackground", "activeBackground", "Foreground",
DEF_BUTTON_ACTIVE_BG_COLOR, Ck_Offset(Button, activeBg),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_COLOR, "-activebackground", "activeBackground", "Foreground",
DEF_BUTTON_ACTIVE_BG_MONO, Ck_Offset(Button, activeBg),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_MONO_ONLY},
{CK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
DEF_BUTTON_ACTIVE_FG_COLOR, Ck_Offset(Button, activeFg),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
DEF_BUTTON_ACTIVE_FG_MONO, Ck_Offset(Button, activeFg),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_MONO_ONLY},
{CK_CONFIG_ANCHOR, "-anchor", "anchor", "Anchor",
DEF_BUTTON_ANCHOR, Ck_Offset(Button, anchor), ALL_MASK},
{CK_CONFIG_ATTR, "-attributes", "attributes", "Attributes",
DEF_BUTTON_ATTR, Ck_Offset(Button, normalAttr),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK},
{CK_CONFIG_ATTR, "-attributes", "attributes", "Attributes",
DEF_LABEL_ATTR, Ck_Offset(Button, normalAttr), LABEL_MASK},
{CK_CONFIG_COLOR, "-background", "background", "Background",
DEF_BUTTON_BG_COLOR, Ck_Offset(Button, normalBg),
ALL_MASK | CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_COLOR, "-background", "background", "Background",
DEF_BUTTON_BG_MONO, Ck_Offset(Button, normalBg),
ALL_MASK | CK_CONFIG_MONO_ONLY},
{CK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
(char *) NULL, 0, ALL_MASK},
{CK_CONFIG_STRING, "-command", "command", "Command",
DEF_BUTTON_COMMAND, Ck_Offset(Button, command),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_NULL_OK},
{CK_CONFIG_ATTR, "-disabledattributes", "disabledAttributes",
"DisabledAttributes", DEF_BUTTON_DISABLED_ATTR,
Ck_Offset(Button, disabledAttr),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK},
{CK_CONFIG_COLOR, "-disabledbackground", "disabledBackground",
"DisabledBackground", DEF_BUTTON_DISABLED_BG_COLOR,
Ck_Offset(Button, disabledBg), BUTTON_MASK|CHECK_BUTTON_MASK
|RADIO_BUTTON_MASK|CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_COLOR, "-disabledbackground", "disabledBackground",
"DisabledBackground", DEF_BUTTON_DISABLED_BG_MONO,
Ck_Offset(Button, disabledBg),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_MONO_ONLY},
{CK_CONFIG_COLOR, "-disabledforeground", "disabledForeground",
"DisabledForeground", DEF_BUTTON_DISABLED_FG_COLOR,
Ck_Offset(Button, disabledFg),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_COLOR, "-disabledforeground", "disabledForeground",
"DisabledForeground", DEF_BUTTON_DISABLED_FG_MONO,
Ck_Offset(Button, disabledFg),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_MONO_ONLY},
{CK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
(char *) NULL, 0, ALL_MASK},
{CK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
DEF_BUTTON_FG, Ck_Offset(Button, normalFg), ALL_MASK},
{CK_CONFIG_INT, "-height", "height", "Height",
DEF_BUTTON_HEIGHT, Ck_Offset(Button, height), ALL_MASK},
{CK_CONFIG_STRING, "-offvalue", "offValue", "Value",
DEF_BUTTON_OFF_VALUE, Ck_Offset(Button, offValue),
CHECK_BUTTON_MASK},
{CK_CONFIG_STRING, "-onvalue", "onValue", "Value",
DEF_BUTTON_ON_VALUE, Ck_Offset(Button, onValue),
CHECK_BUTTON_MASK},
{CK_CONFIG_COLOR, "-selectcolor", "selectColor", "Background",
DEF_BUTTON_SELECT_COLOR, Ck_Offset(Button, selectFg),
CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_COLOR, "-selectcolor", "selectColor", "Background",
DEF_BUTTON_SELECT_MONO, Ck_Offset(Button, selectFg),
CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_MONO_ONLY},
{CK_CONFIG_UID, "-state", "state", "State",
DEF_BUTTON_STATE, Ck_Offset(Button, state),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK},
{CK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
DEF_BUTTON_TAKE_FOCUS, Ck_Offset(Button, takeFocus),
BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|CK_CONFIG_NULL_OK},
{CK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
DEF_LABEL_TAKE_FOCUS, Ck_Offset(Button, takeFocus),
LABEL_MASK|CK_CONFIG_NULL_OK},
{CK_CONFIG_STRING, "-text", "text", "Text",
DEF_BUTTON_TEXT, Ck_Offset(Button, text), ALL_MASK},
{CK_CONFIG_STRING, "-textvariable", "textVariable", "Variable",
DEF_BUTTON_TEXT_VARIABLE, Ck_Offset(Button, textVarName),
ALL_MASK|CK_CONFIG_NULL_OK},
{CK_CONFIG_INT, "-underline", "underline", "Underline",
DEF_BUTTON_UNDERLINE, Ck_Offset(Button, underline),
ALL_MASK},
{CK_CONFIG_ATTR, "-underlineattributes", "underlineAttributes",
"UnderlineAttributes", DEF_BUTTON_UNDERLINE_ATTR,
Ck_Offset(Button, underlineAttr), ALL_MASK},
{CK_CONFIG_COLOR, "-underlineforeground", "underlineForeground",
"UnderlineForeground", DEF_BUTTON_UNDERLINE_FG_COLOR,
Ck_Offset(Button, underlineFg), ALL_MASK|CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_COLOR, "-underlineforeground", "underlineForeground",
"UnderlineForeground", DEF_BUTTON_UNDERLINE_FG_MONO,
Ck_Offset(Button, underlineFg), ALL_MASK|CK_CONFIG_MONO_ONLY},
{CK_CONFIG_STRING, "-value", "value", "Value",
DEF_BUTTON_VALUE, Ck_Offset(Button, onValue),
RADIO_BUTTON_MASK|CK_CONFIG_NULL_OK},
{CK_CONFIG_STRING, "-variable", "variable", "Variable",
DEF_RADIOBUTTON_VARIABLE, Ck_Offset(Button, selVarName),
RADIO_BUTTON_MASK},
{CK_CONFIG_STRING, "-variable", "variable", "Variable",
DEF_CHECKBUTTON_VARIABLE, Ck_Offset(Button, selVarName),
CHECK_BUTTON_MASK|CK_CONFIG_NULL_OK},
{CK_CONFIG_INT, "-width", "width", "Width",
DEF_BUTTON_WIDTH, Ck_Offset(Button, width), ALL_MASK},
{CK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
(char *) NULL, 0, 0}
};
/*
* String to print out in error messages, identifying options for
* widget commands for different types of labels or buttons:
*/
static char *optionStrings[] = {
"cget or configure",
"activate, cget, configure, deactivate, flash, or invoke",
"activate, cget, configure, deactivate, deselect, flash, invoke, select, or toggle",
"activate, cget, configure, deactivate, deselect, flash, invoke, or select"
};
/*
* Forward declarations for procedures defined later in this file:
*/
static void ButtonCmdDeletedProc _ANSI_ARGS_((
ClientData clientData));
static void ButtonEventProc _ANSI_ARGS_((ClientData clientData,
CkEvent *eventPtr));
static char * ButtonTextVarProc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, char *name1, char *name2,
int flags));
static char * ButtonVarProc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, char *name1, char *name2,
int flags));
static int ButtonWidgetCmd _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, char **argv));
static void ComputeButtonGeometry _ANSI_ARGS_((Button *butPtr));
static int ConfigureButton _ANSI_ARGS_((Tcl_Interp *interp,
Button *butPtr, int argc, char **argv,
int flags));
static void DestroyButton _ANSI_ARGS_((ClientData clientData));
static void DisplayButton _ANSI_ARGS_((ClientData clientData));
static int InvokeButton _ANSI_ARGS_((Button *butPtr));
/*
*--------------------------------------------------------------
*
* Ck_ButtonCmd --
*
* 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
Ck_ButtonCmd(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. */
{
Button *butPtr;
int type;
CkWindow *winPtr = (CkWindow *) clientData;
CkWindow *new;
char buf[256];
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " pathName ?options?\"", (char *) NULL);
return TCL_ERROR;
}
switch (argv[0][0]) {
case 'l':
type = TYPE_LABEL;
break;
case 'b':
type = TYPE_BUTTON;
break;
case 'c':
type = TYPE_CHECK_BUTTON;
break;
case 'r':
type = TYPE_RADIO_BUTTON;
break;
default:
sprintf(buf, "unknown button-creation command \"%.50s\"", argv[0]);
Tcl_SetObjResult( interp, Tcl_NewStringObj(buf,-1));
return TCL_ERROR;
}
/*
* Create the new window.
*/
new = Ck_CreateWindowFromPath(interp, winPtr, argv[1], 0);
if (new == NULL) {
return TCL_ERROR;
}
/*
* Initialize the data structure for the button.
*/
butPtr = (Button *) ckalloc(sizeof (Button));
butPtr->winPtr = new;
butPtr->interp = interp;
butPtr->widgetCmd = Tcl_CreateCommand(interp,
butPtr->winPtr->pathName, ButtonWidgetCmd,
(ClientData) butPtr, ButtonCmdDeletedProc);
butPtr->type = type;
butPtr->text = NULL;
butPtr->textLength = 0;
butPtr->textVarName = NULL;
butPtr->state = ckNormalUid;
butPtr->normalFg = 0;
butPtr->normalBg = 0;
butPtr->normalAttr = 0;
butPtr->activeFg = 0;
butPtr->activeBg = 0;
butPtr->activeAttr = 0;
butPtr->disabledFg = 0;
butPtr->disabledBg = 0;
butPtr->disabledAttr = 0;
butPtr->underline = -1;
butPtr->underlineFg = 0;
butPtr->underlineAttr = 0;
butPtr->selectFg = 0;
butPtr->width = 0;
butPtr->height = 0;
butPtr->anchor = CK_ANCHOR_CENTER;
butPtr->selVarName = NULL;
butPtr->onValue = NULL;
butPtr->offValue = NULL;
butPtr->command = NULL;
butPtr->takeFocus = NULL;
butPtr->flags = 0;
Ck_SetClass(new, classNames[type]);
Ck_CreateEventHandler(butPtr->winPtr,
CK_EV_EXPOSE | CK_EV_MAP | CK_EV_DESTROY,
ButtonEventProc, (ClientData) butPtr);
if (ConfigureButton(interp, butPtr, argc-2, argv+2,
configFlags[type]) != TCL_OK) {
Ck_DestroyWindow(butPtr->winPtr);
return TCL_ERROR;
}
Tcl_SetObjResult( interp, Tcl_NewStringObj(butPtr->winPtr->pathName,-1));
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* ButtonWidgetCmd --
*
* 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
ButtonWidgetCmd(clientData, interp, argc, argv)
ClientData clientData; /* Information about button widget. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
Button *butPtr = (Button *) clientData;
int result = TCL_OK;
int length;
char c;
char buf[256];
if (argc < 2) {
sprintf(buf,
"wrong # args: should be \"%.50s option [arg arg ...]\"",
argv[0]);
Tcl_SetObjResult( interp, Tcl_NewStringObj(buf,-1));
return TCL_ERROR;
}
Ck_Preserve((ClientData) butPtr);
c = argv[1][0];
length = strlen(argv[1]);
if ((c == 'a') && (strncmp(argv[1], "activate", length) == 0)
&& (butPtr->type != TYPE_LABEL)) {
if (argc > 2) {
sprintf(buf,
"wrong # args: should be \"%.50s activate\"",
argv[0]);
Tcl_SetObjResult( interp, Tcl_NewStringObj(buf,-1));
goto error;
}
if (butPtr->state != ckDisabledUid) {
butPtr->state = ckActiveUid;
goto redisplay;
}
} else 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 = Ck_ConfigureValue(interp, butPtr->winPtr, configSpecs,
(char *) butPtr, argv[2], configFlags[butPtr->type]);
} else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)) {
if (argc == 2) {
result = Ck_ConfigureInfo(interp, butPtr->winPtr, configSpecs,
(char *) butPtr, (char *) NULL, configFlags[butPtr->type]);
} else if (argc == 3) {
result = Ck_ConfigureInfo(interp, butPtr->winPtr, configSpecs,
(char *) butPtr, argv[2],
configFlags[butPtr->type]);
} else {
result = ConfigureButton(interp, butPtr, argc-2, argv+2,
configFlags[butPtr->type] | CK_CONFIG_ARGV_ONLY);
}
} else if ((c == 'd') && (strncmp(argv[1], "deactivate", length) == 0)
&& (length > 2) && (butPtr->type != TYPE_LABEL)) {
if (argc > 2) {
sprintf(buf,
"wrong # args: should be \"%.50s deactivate\"",
argv[0]);
Tcl_SetObjResult( interp, Tcl_NewStringObj(buf,-1));
goto error;
}
if (butPtr->state != ckDisabledUid) {
butPtr->state = ckNormalUid;
goto redisplay;
}
} else if ((c == 'd') && (strncmp(argv[1], "deselect", length) == 0)
&& (length > 2) && (butPtr->type >= TYPE_CHECK_BUTTON)) {
if (argc > 2) {
sprintf(buf,
"wrong # args: should be \"%.50s deselect\"",
argv[0]);
Tcl_SetObjResult( interp, Tcl_NewStringObj(buf,-1));
goto error;
}
if (butPtr->type == TYPE_CHECK_BUTTON) {
Tcl_SetVar(interp, butPtr->selVarName, butPtr->offValue,
TCL_GLOBAL_ONLY);
} else if (butPtr->flags & SELECTED) {
Tcl_SetVar(interp, butPtr->selVarName, "", TCL_GLOBAL_ONLY);
}
} else if ((c == 'i') && (strncmp(argv[1], "invoke", length) == 0)
&& (butPtr->type > TYPE_LABEL)) {
if (argc > 2) {
sprintf(buf,
"wrong # args: should be \"%.50s invoke\"",
argv[0]);
Tcl_SetObjResult( interp, Tcl_NewStringObj(buf,-1));
goto error;
}
if (butPtr->state != ckDisabledUid) {
result = InvokeButton(butPtr);
}
} else if ((c == 's') && (strncmp(argv[1], "select", length) == 0)
&& (butPtr->type >= TYPE_CHECK_BUTTON)) {
if (argc > 2) {
sprintf(buf,
"wrong # args: should be \"%.50s select\"",
argv[0]);
Tcl_SetObjResult( interp, Tcl_NewStringObj(buf,-1));
goto error;
}
Tcl_SetVar(interp, butPtr->selVarName, butPtr->onValue, TCL_GLOBAL_ONLY);
} else if ((c == 't') && (strncmp(argv[1], "toggle", length) == 0)
&& (length >= 2) && (butPtr->type == TYPE_CHECK_BUTTON)) {
if (argc > 2) {
sprintf(buf,
"wrong # args: should be \"%.50s select\"",
argv[0]);
Tcl_SetObjResult( interp, Tcl_NewStringObj(buf,-1));
goto error;
}
if (butPtr->flags & SELECTED) {
Tcl_SetVar(interp, butPtr->selVarName, butPtr->offValue, TCL_GLOBAL_ONLY);
} else {
Tcl_SetVar(interp, butPtr->selVarName, butPtr->onValue, TCL_GLOBAL_ONLY);
}
} else {
sprintf(buf,
"bad option \"%.50s\": must be %s", argv[1],
optionStrings[butPtr->type]);
Tcl_SetObjResult( interp, Tcl_NewStringObj(buf,-1));
goto error;
}
Ck_Release((ClientData) butPtr);
return result;
redisplay:
if ((butPtr->winPtr->flags & CK_MAPPED) &&
!(butPtr->flags & REDRAW_PENDING)) {
Tk_DoWhenIdle(DisplayButton, (ClientData) butPtr);
butPtr->flags |= REDRAW_PENDING;
}
Ck_Release((ClientData) butPtr);
return TCL_OK;
error:
Ck_Release((ClientData) butPtr);
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* DestroyButton --
*
* This procedure is invoked by Ck_EventuallyFree or Ck_Release
* to clean up the internal structure of a button at a safe time
* (when no-one is using it anymore).
*
* Results:
* None.
*
* Side effects:
* Everything associated with the widget is freed up.
*
*----------------------------------------------------------------------
*/
static void
DestroyButton(clientData)
ClientData clientData; /* Info about entry widget. */
{
Button *butPtr = (Button *) clientData;
/*
* Free up all the stuff that requires special handling, then
* let Tk_FreeOptions handle all the standard option-related
* stuff.
*/
if (butPtr->textVarName != NULL) {
Tcl_UntraceVar(butPtr->interp, butPtr->textVarName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
ButtonTextVarProc, (ClientData) butPtr);
}
if (butPtr->selVarName != NULL) {
Tcl_UntraceVar(butPtr->interp, butPtr->selVarName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
ButtonVarProc, (ClientData) butPtr);
}
Ck_FreeOptions(configSpecs, (char *) butPtr, configFlags[butPtr->type]);
ckfree((char *) butPtr);
}
/*
*----------------------------------------------------------------------
*
* ButtonCmdDeletedProc --
*
* 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
ButtonCmdDeletedProc(clientData)
ClientData clientData; /* Pointer to widget record for widget. */
{
Button *butPtr = (Button *) clientData;
CkWindow *winPtr = butPtr->winPtr;
/*
* This procedure could be invoked either because the window was
* destroyed and the command was then deleted (in which case winPtr
* is NULL) or because the command was deleted, and then this procedure
* destroys the widget.
*/
if (winPtr != NULL) {
butPtr->winPtr = NULL;
Ck_DestroyWindow(winPtr);
}
}
/*
*----------------------------------------------------------------------
*
* ConfigureButton --
*
* This procedure is called to process an argv/argc list, plus
* the Tk option database, in order to configure (or
* reconfigure) a button 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 butPtr; old resources get freed, if there
* were any. The button is redisplayed.
*
*----------------------------------------------------------------------
*/
static int
ConfigureButton(interp, butPtr, argc, argv, flags)
Tcl_Interp *interp; /* Used for error reporting. */
Button *butPtr; /* 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. */
{
/*
* Eliminate any existing trace on variables monitored by the button.
*/
if (butPtr->textVarName != NULL) {
Tcl_UntraceVar(interp, butPtr->textVarName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
ButtonTextVarProc, (ClientData) butPtr);
}
if (butPtr->selVarName != NULL) {
Tcl_UntraceVar(interp, butPtr->selVarName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
ButtonVarProc, (ClientData) butPtr);
}
if (Ck_ConfigureWidget(interp, butPtr->winPtr, configSpecs,
argc, argv, (char *) butPtr, flags) != TCL_OK) {
return TCL_ERROR;
}
/*
* A few options need special processing.
*/
if (butPtr->state != ckActiveUid && butPtr->state != ckDisabledUid)
butPtr->state = ckNormalUid;
if (butPtr->type >= TYPE_CHECK_BUTTON) {
char *value;
if (butPtr->selVarName == NULL) {
butPtr->selVarName = (char *) ckalloc(
strlen((char *) butPtr->winPtr->nameUid) + 1);
strcpy(butPtr->selVarName, (char *) butPtr->winPtr->nameUid);
}
if (butPtr->onValue == NULL) {
butPtr->onValue = (char *) ckalloc(
strlen((char *) butPtr->winPtr->nameUid) + 1);
strcpy(butPtr->onValue, (char *) butPtr->winPtr->nameUid);
}
/*
* Select the button if the associated variable has the
* appropriate value, initialize the variable if it doesn't
* exist, then set a trace on the variable to monitor future
* changes to its value.
*/
value = Tcl_GetVar(interp, butPtr->selVarName, TCL_GLOBAL_ONLY);
butPtr->flags &= ~SELECTED;
if (value != NULL) {
if (strcmp(value, butPtr->onValue) == 0) {
butPtr->flags |= SELECTED;
}
} else {
Tcl_SetVar(interp, butPtr->selVarName,
(butPtr->type == TYPE_CHECK_BUTTON) ? butPtr->offValue : "",
TCL_GLOBAL_ONLY);
}
Tcl_TraceVar(interp, butPtr->selVarName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
ButtonVarProc, (ClientData) butPtr);
}
/*
* If the button is to display the value of a variable, then set up
* a trace on the variable's value, create the variable if it doesn't
* exist, and fetch its current value.
*/
if (butPtr->textVarName != NULL) {
char *value;
value = Tcl_GetVar(interp, butPtr->textVarName, TCL_GLOBAL_ONLY);
if (value == NULL) {
Tcl_SetVar(interp, butPtr->textVarName,
butPtr->text != NULL ? butPtr->text : "",
TCL_GLOBAL_ONLY);
} else {
if (butPtr->text != NULL) {
ckfree(butPtr->text);
}
butPtr->text = ckalloc((unsigned) (strlen(value) + 1));
strcpy(butPtr->text, value);
}
Tcl_TraceVar(interp, butPtr->textVarName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
ButtonTextVarProc, (ClientData) butPtr);
}
ComputeButtonGeometry(butPtr);
/*
* Lastly, arrange for the button to be redisplayed.
*/
if ((butPtr->winPtr->flags & CK_MAPPED)
&& !(butPtr->flags & REDRAW_PENDING)) {
Tk_DoWhenIdle(DisplayButton, (ClientData) butPtr);
butPtr->flags |= REDRAW_PENDING;
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* DisplayButton --
*
* This procedure is invoked to display a button widget.
*
* Results:
* None.
*
* Side effects:
* Commands are output to display the button in its
* current mode.
*
*----------------------------------------------------------------------
*/
static void
DisplayButton(clientData)
ClientData clientData; /* Information about widget. */
{
Button *butPtr = (Button *) clientData;
int x, y, fg, bg, attr, textWidth, charWidth;
CkWindow *winPtr = butPtr->winPtr;
butPtr->flags &= ~REDRAW_PENDING;
if ((butPtr->winPtr == NULL) || !(winPtr->flags & CK_MAPPED)) {
return;
}
if (butPtr->state == ckDisabledUid) {
fg = butPtr->disabledFg;
bg = butPtr->disabledBg;
attr = butPtr->disabledAttr;
} else if (butPtr->state == ckActiveUid) {
fg = butPtr->activeFg;
bg = butPtr->activeBg;
attr = butPtr->activeAttr;
} else {
fg = butPtr->normalFg;
bg = butPtr->normalBg;
attr = butPtr->normalAttr;
}
/*
* Display text for button.
*/
if (butPtr->text != NULL)
CkMeasureChars(winPtr->mainPtr, butPtr->text, butPtr->textLength,
0, winPtr->width, 0, CK_NEWLINES_NOT_SPECIAL | CK_IGNORE_TABS,
&textWidth, &charWidth);
else
textWidth = 0;
switch (butPtr->anchor) {
case CK_ANCHOR_NW: case CK_ANCHOR_W: case CK_ANCHOR_SW:
x = butPtr->type >= TYPE_CHECK_BUTTON ? 4 : 0;
break;
case CK_ANCHOR_N: case CK_ANCHOR_CENTER: case CK_ANCHOR_S:
x = (winPtr->width - textWidth) / 2;
if (butPtr->type >= TYPE_CHECK_BUTTON)
x += 2;
break;
default:
x = winPtr->width - textWidth;
if (butPtr->type >= TYPE_CHECK_BUTTON && x < 4)
x = 4;
break;
}
if (x + textWidth > winPtr->width)
textWidth = winPtr->width - x;
switch (butPtr->anchor) {
case CK_ANCHOR_NW: case CK_ANCHOR_N: case CK_ANCHOR_NE:
y = 0;
break;
case CK_ANCHOR_W: case CK_ANCHOR_CENTER: case CK_ANCHOR_E:
y = (winPtr->height - 1) / 2;
break;
default:
y = winPtr->height - 1;
if (y < 0)
y = 0;
break;
}
Ck_SetWindowAttr(winPtr, fg, bg, attr);
Ck_ClearToBot(winPtr, 0, 0);
if (butPtr->text != NULL) {
CkDisplayChars(winPtr->mainPtr,
winPtr->window, butPtr->text, charWidth, x, y,
0, CK_NEWLINES_NOT_SPECIAL | CK_IGNORE_TABS);
if (butPtr->underline >= 0 && butPtr->state == ckNormalUid) {
Ck_SetWindowAttr(winPtr, butPtr->underlineFg, bg,
butPtr->underlineAttr);
CkUnderlineChars(winPtr->mainPtr,
winPtr->window, butPtr->text, charWidth, x, y,
0, CK_NEWLINES_NOT_SPECIAL | CK_IGNORE_TABS,
butPtr->underline, butPtr->underline);
Ck_SetWindowAttr(winPtr, fg, bg, attr);
}
}
if (butPtr->type >= TYPE_CHECK_BUTTON) {
long gchar;
mvwaddstr(winPtr->window, y, 0, butPtr->type == TYPE_CHECK_BUTTON ?
"[ ]" : "( )");
Ck_SetWindowAttr(winPtr, butPtr->selectFg, bg, attr);
if (!(butPtr->flags & SELECTED)) {
mvwaddch(winPtr->window, y, 1, (unsigned char) ' ');
} else if (butPtr->type == TYPE_CHECK_BUTTON) {
Ck_GetGChar(butPtr->interp, "diamond", &gchar);
mvwaddch(winPtr->window, y, 1, gchar);
} else if (butPtr->type == TYPE_RADIO_BUTTON) {
Ck_GetGChar(butPtr->interp, "bullet", &gchar);
mvwaddch(winPtr->window, y, 1, gchar);
}
}
Ck_SetWindowAttr(winPtr, fg, bg, attr);
wmove(winPtr->window, y, (butPtr->type >= TYPE_CHECK_BUTTON) ? 1 : x);
Ck_EventuallyRefresh(winPtr);
}
/*
*--------------------------------------------------------------
*
* ButtonEventProc --
*
* This procedure is invoked by the 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
ButtonEventProc(clientData, eventPtr)
ClientData clientData; /* Information about window. */
CkEvent *eventPtr; /* Information about event. */
{
Button *butPtr = (Button *) clientData;
if (eventPtr->type == CK_EV_EXPOSE || eventPtr->type == CK_EV_MAP) {
if ((butPtr->winPtr != NULL) && !(butPtr->flags & REDRAW_PENDING)) {
Tk_DoWhenIdle(DisplayButton, (ClientData) butPtr);
butPtr->flags |= REDRAW_PENDING;
}
} else if (eventPtr->type == CK_EV_DESTROY) {
if (butPtr->winPtr != NULL) {
butPtr->winPtr = NULL;
Tcl_DeleteCommand(butPtr->interp,
Tcl_GetCommandName(butPtr->interp, butPtr->widgetCmd));
}
if (butPtr->flags & REDRAW_PENDING) {
Tk_CancelIdleCall(DisplayButton, (ClientData) butPtr);
}
Ck_EventuallyFree((ClientData) butPtr, (Ck_FreeProc *) DestroyButton);
}
}
/*
*----------------------------------------------------------------------
*
* ComputeButtonGeometry --
*
* After changes in a button's text or bitmap, this procedure
* recomputes the button's geometry and passes this information
* along to the geometry manager for the window.
*
* Results:
* None.
*
* Side effects:
* The button's window may change size.
*
*----------------------------------------------------------------------
*/
static void
ComputeButtonGeometry(butPtr)
Button *butPtr; /* Button whose geometry may have changed. */
{
int width, height, dummy;
CkWindow *winPtr = butPtr->winPtr;
butPtr->textLength = butPtr->text == NULL ? 0 : strlen(butPtr->text);
if (butPtr->height > 0)
height = butPtr->height;
else
height = 1;
if (butPtr->width > 0)
width = butPtr->width;
else