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stk/Tk/win/tkWinButton.c

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Commit of 3.99.4 version
1999-02-02 06:13:40 -05:00
/*
* tkWinButton.c --
*
* This file implements the Windows specific portion of the button
* widgets.
*
* Copyright (c) 1996 by 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: @(#) tkWinButton.c 1.12 97/09/02 13:18:27
*/
#define OEMRESOURCE
#include "tkWinInt.h"
#include "tkButton.h"
/*
* These macros define the base style flags for the different button types.
*/
#define LABEL_STYLE (BS_OWNERDRAW | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS)
#define PUSH_STYLE (BS_OWNERDRAW | BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS)
#define CHECK_STYLE (BS_OWNERDRAW | BS_CHECKBOX | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS)
#define RADIO_STYLE (BS_OWNERDRAW | BS_RADIOBUTTON | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS)
static DWORD buttonStyles[] = {
LABEL_STYLE, PUSH_STYLE, CHECK_STYLE, RADIO_STYLE
};
/*
* Declaration of Windows specific button structure.
*/
typedef struct WinButton {
TkButton info; /* Generic button info. */
WNDPROC oldProc; /* Old window procedure. */
HWND hwnd; /* Current window handle. */
Pixmap pixmap; /* Bitmap for rendering the button. */
DWORD style; /* Window style flags. */
} WinButton;
/*
* The following macro reverses the order of RGB bytes to convert
* between RGBQUAD and COLORREF values.
*/
#define FlipColor(rgb) (RGB(GetBValue(rgb),GetGValue(rgb),GetRValue(rgb)))
/*
* The following enumeration defines the meaning of the palette entries
* in the "buttons" image used to draw checkbox and radiobutton indicators.
*/
enum {
PAL_CHECK = 0,
PAL_TOP_OUTER = 1,
PAL_BOTTOM_OUTER = 2,
PAL_BOTTOM_INNER = 3,
PAL_INTERIOR = 4,
PAL_TOP_INNER = 5,
PAL_BACKGROUND = 6
};
/*
* Set to non-zero if this module is initialized.
*/
static int initialized = 0;
/*
* Variables for the cached information about the boxes bitmap.
*/
static BITMAPINFOHEADER *boxesPtr = NULL; /* Information about the bitmap. */
static DWORD *boxesPalette = NULL; /* Pointer to color palette. */
static LPSTR boxesBits = NULL; /* Pointer to bitmap data. */
static DWORD boxHeight = 0, boxWidth = 0; /* Size of each sub-image. */
/*
* This variable holds the default border width for a button in string
* form for use in a Tk_ConfigSpec.
*/
static char defWidth[8];
/*
* Declarations for functions defined in this file.
*/
static int ButtonBindProc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, XEvent *eventPtr,
Tk_Window tkwin, KeySym keySym));
static LRESULT CALLBACK ButtonProc _ANSI_ARGS_((HWND hwnd, UINT message,
WPARAM wParam, LPARAM lParam));
static DWORD ComputeStyle _ANSI_ARGS_((WinButton* butPtr));
static Window CreateProc _ANSI_ARGS_((Tk_Window tkwin,
Window parent, ClientData instanceData));
static void InitBoxes _ANSI_ARGS_((void));
static void UpdateButtonDefaults _ANSI_ARGS_((void));
/*
* The class procedure table for the button widgets.
*/
TkClassProcs tkpButtonProcs = {
CreateProc, /* createProc. */
TkButtonWorldChanged, /* geometryProc. */
NULL /* modalProc. */
};
/*
*----------------------------------------------------------------------
*
* InitBoxes --
*
* This function load the Tk 3d button bitmap. "buttons" is a 16
* color bitmap that is laid out such that the top row contains
* the 4 checkbox images, and the bottom row contains the radio
* button images. Note that the bitmap is stored in bottom-up
* format. Also, the first seven palette entries are used to
* identify the different parts of the bitmaps so we can do the
* appropriate color mappings based on the current button colors.
*
* Results:
* None.
*
* Side effects:
* Loads the "buttons" resource.
*
*----------------------------------------------------------------------
*/
static void
InitBoxes()
{
/*
* For DLLs like Tk, the HINSTANCE is the same as the HMODULE.
*/
HMODULE module = (HINSTANCE) Tk_GetHINSTANCE();
HRSRC hrsrc;
HGLOBAL hblk;
LPBITMAPINFOHEADER newBitmap;
DWORD size;
hrsrc = FindResource(module, "buttons", RT_BITMAP);
if (hrsrc) {
hblk = LoadResource(module, hrsrc);
boxesPtr = (LPBITMAPINFOHEADER)LockResource(hblk);
}
/*
* Copy the DIBitmap into writable memory.
*/
if (boxesPtr != NULL && !(boxesPtr->biWidth % 4)
&& !(boxesPtr->biHeight % 2)) {
size = boxesPtr->biSize + (1 << boxesPtr->biBitCount) * sizeof(RGBQUAD)
+ boxesPtr->biSizeImage;
newBitmap = (LPBITMAPINFOHEADER) ckalloc(size);
memcpy(newBitmap, boxesPtr, size);
boxesPtr = newBitmap;
boxWidth = boxesPtr->biWidth / 4;
boxHeight = boxesPtr->biHeight / 2;
boxesPalette = (DWORD*) (((LPSTR)boxesPtr) + boxesPtr->biSize);
boxesBits = ((LPSTR)boxesPalette)
+ ((1 << boxesPtr->biBitCount) * sizeof(RGBQUAD));
} else {
boxesPtr = NULL;
}
}
/*
*----------------------------------------------------------------------
*
* UpdateButtonDefaults --
*
* This function retrieves the current system defaults for
* the button widgets.
*
* Results:
* None.
*
* Side effects:
* Updates the configuration defaults for buttons.
*
*----------------------------------------------------------------------
*/
void
UpdateButtonDefaults()
{
Tk_ConfigSpec *specPtr;
int width = GetSystemMetrics(SM_CXEDGE);
if (width == 0) {
width = 1;
}
sprintf(defWidth, "%d", width);
for (specPtr = tkpButtonConfigSpecs; specPtr->type != TK_CONFIG_END;
specPtr++) {
if (specPtr->offset == Tk_Offset(TkButton, borderWidth)) {
specPtr->defValue = defWidth;
}
}
}
/*
*----------------------------------------------------------------------
*
* TkpCreateButton --
*
* Allocate a new TkButton structure.
*
* Results:
* Returns a newly allocated TkButton structure.
*
* Side effects:
* Registers an event handler for the widget.
*
*----------------------------------------------------------------------
*/
TkButton *
TkpCreateButton(tkwin)
Tk_Window tkwin;
{
WinButton *butPtr;
if (!initialized) {
UpdateButtonDefaults();
initialized = 1;
}
butPtr = (WinButton *)ckalloc(sizeof(WinButton));
butPtr->hwnd = NULL;
return (TkButton *) butPtr;
}
/*
*----------------------------------------------------------------------
*
* CreateProc --
*
* This function creates a new Button control, subclasses
* the instance, and generates a new Window object.
*
* Results:
* Returns the newly allocated Window object, or None on failure.
*
* Side effects:
* Causes a new Button control to come into existence.
*
*----------------------------------------------------------------------
*/
static Window
CreateProc(tkwin, parentWin, instanceData)
Tk_Window tkwin; /* Token for window. */
Window parentWin; /* Parent of new window. */
ClientData instanceData; /* Button instance data. */
{
Window window;
HWND parent;
char *class;
WinButton *butPtr = (WinButton *)instanceData;
parent = Tk_GetHWND(parentWin);
if (butPtr->info.type == TYPE_LABEL) {
class = "STATIC";
butPtr->style = SS_OWNERDRAW | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS;
} else {
class = "BUTTON";
butPtr->style = BS_OWNERDRAW | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS;
}
butPtr->hwnd = CreateWindow(class, NULL, butPtr->style,
Tk_X(tkwin), Tk_Y(tkwin), Tk_Width(tkwin), Tk_Height(tkwin),
parent, NULL, Tk_GetHINSTANCE(), NULL);
SetWindowPos(butPtr->hwnd, HWND_TOP, 0, 0, 0, 0,
SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
butPtr->oldProc = (WNDPROC)SetWindowLong(butPtr->hwnd, GWL_WNDPROC,
(DWORD) ButtonProc);
window = Tk_AttachHWND(tkwin, butPtr->hwnd);
return window;
}
/*
*----------------------------------------------------------------------
*
* TkpDestroyButton --
*
* Free data structures associated with the button control.
*
* Results:
* None.
*
* Side effects:
* Restores the default control state.
*
*----------------------------------------------------------------------
*/
void
TkpDestroyButton(butPtr)
TkButton *butPtr;
{
WinButton *winButPtr = (WinButton *)butPtr;
HWND hwnd = winButPtr->hwnd;
if (hwnd) {
SetWindowLong(hwnd, GWL_WNDPROC, (DWORD) winButPtr->oldProc);
}
}
/*
*----------------------------------------------------------------------
*
* TkpDisplayButton --
*
* This procedure is invoked to display a button widget. It is
* normally invoked as an idle handler.
*
* Results:
* None.
*
* Side effects:
* Information appears on the screen. The REDRAW_PENDING flag
* is cleared.
*
*----------------------------------------------------------------------
*/
void
TkpDisplayButton(clientData)
ClientData clientData; /* Information about widget. */
{
TkWinDCState state;
HDC dc;
register TkButton *butPtr = (TkButton *) clientData;
GC gc;
Tk_3DBorder border;
Pixmap pixmap;
int x = 0; /* Initialization only needed to stop
* compiler warning. */
int y, relief;
register Tk_Window tkwin = butPtr->tkwin;
int width, height;
int defaultWidth; /* Width of default ring. */
int offset; /* 0 means this is a label widget. 1 means
* it is a flavor of button, so we offset
* the text to make the button appear to
* move up and down as the relief changes. */
butPtr->flags &= ~REDRAW_PENDING;
if ((butPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
return;
}
border = butPtr->normalBorder;
if ((butPtr->state == tkDisabledUid) && (butPtr->disabledFg != NULL)) {
gc = butPtr->disabledGC;
} else if ((butPtr->state == tkActiveUid)
&& !Tk_StrictMotif(butPtr->tkwin)) {
gc = butPtr->activeTextGC;
border = butPtr->activeBorder;
} else {
gc = butPtr->normalTextGC;
}
if ((butPtr->flags & SELECTED) && (butPtr->state != tkActiveUid)
&& (butPtr->selectBorder != NULL) && !butPtr->indicatorOn) {
border = butPtr->selectBorder;
}
/*
* Override the relief specified for the button if this is a
* checkbutton or radiobutton and there's no indicator.
*/
relief = butPtr->relief;
if ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn) {
relief = (butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN
: TK_RELIEF_RAISED;
}
/*
* Compute width of default ring and offset for pushed buttons.
*/
if (butPtr->type == TYPE_BUTTON) {
defaultWidth = ((butPtr->defaultState == tkActiveUid)
? butPtr->highlightWidth : 0);
offset = 1;
} else {
defaultWidth = 0;
if ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn) {
offset = 1;
} else {
offset = 0;
}
}
/*
* In order to avoid screen flashes, this procedure redraws
* the 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(butPtr->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 (butPtr->image != None) {
Tk_SizeOfImage(butPtr->image, &width, &height);
imageOrBitmap:
TkComputeAnchor(butPtr->anchor, tkwin, 0, 0,
butPtr->indicatorSpace + width, height, &x, &y);
x += butPtr->indicatorSpace;
if (relief == TK_RELIEF_SUNKEN) {
x += offset;
y += offset;
}
if (butPtr->image != NULL) {
if ((butPtr->selectImage != NULL) && (butPtr->flags & SELECTED)) {
Tk_RedrawImage(butPtr->selectImage, 0, 0, width, height,
pixmap, x, y);
} else {
Tk_RedrawImage(butPtr->image, 0, 0, width, height, pixmap,
x, y);
}
} else {
XSetClipOrigin(butPtr->display, gc, x, y);
XCopyPlane(butPtr->display, butPtr->bitmap, pixmap, gc, 0, 0,
(unsigned int) width, (unsigned int) height, x, y, 1);
XSetClipOrigin(butPtr->display, gc, 0, 0);
}
y += height/2;
} else if (butPtr->bitmap != None) {
Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
goto imageOrBitmap;
} else {
RECT rect;
TkComputeAnchor(butPtr->anchor, tkwin, butPtr->padX, butPtr->padY,
butPtr->indicatorSpace + butPtr->textWidth, butPtr->textHeight,
&x, &y);
x += butPtr->indicatorSpace;
if (relief == TK_RELIEF_SUNKEN) {
x += offset;
y += offset;
}
Tk_DrawTextLayout(butPtr->display, pixmap, gc, butPtr->textLayout,
x, y, 0, -1);
Tk_UnderlineTextLayout(butPtr->display, pixmap, gc,
butPtr->textLayout, x, y, butPtr->underline);
/*
* Draw the focus ring. If this is a push button then we need to put
* it around the inner edge of the border, otherwise we put it around
* the text.
*/
if (butPtr->flags & GOT_FOCUS && butPtr->type != TYPE_LABEL) {
dc = TkWinGetDrawableDC(butPtr->display, pixmap, &state);
if (butPtr->type == TYPE_BUTTON || !butPtr->indicatorOn) {
rect.top = butPtr->borderWidth + 1 + defaultWidth;
rect.left = rect.top;
rect.right = Tk_Width(tkwin) - rect.left;
rect.bottom = Tk_Height(tkwin) - rect.top;
} else {
rect.top = y-2;
rect.left = x-2;
rect.right = x+butPtr->textWidth + 1;
rect.bottom = y+butPtr->textHeight + 1;
}
SetTextColor(dc, gc->foreground);
SetBkColor(dc, gc->background);
DrawFocusRect(dc, &rect);
TkWinReleaseDrawableDC(pixmap, dc, &state);
}
y += butPtr->textHeight/2;
}
/*
* Draw the indicator for check buttons and radio buttons. At this
* point x and y refer to the top-left corner of the text or image
* or bitmap.
*/
if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn
&& boxesPtr) {
int xSrc, ySrc;
x -= butPtr->indicatorSpace;
y -= butPtr->indicatorDiameter / 2;
xSrc = (butPtr->flags & SELECTED) ? boxWidth : 0;
if (butPtr->state == tkActiveUid) {
xSrc += boxWidth*2;
}
ySrc = (butPtr->type == TYPE_RADIO_BUTTON) ? 0 : boxHeight;
/*
* Update the palette in the boxes bitmap to reflect the current
* button colors. Note that this code relies on the layout of the
* bitmap's palette. Also, all of the colors used to draw the
* bitmap must be in the palette that is selected into the DC of
* the offscreen pixmap. This requires that the static colors
* be placed into the palette.
*/
boxesPalette[PAL_CHECK] = FlipColor(gc->foreground);
boxesPalette[PAL_TOP_OUTER] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_DARK_GC));
boxesPalette[PAL_TOP_INNER] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_DARK2));
boxesPalette[PAL_BOTTOM_INNER] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_LIGHT2));
boxesPalette[PAL_BOTTOM_OUTER] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_LIGHT_GC));
if (butPtr->state == tkDisabledUid) {
boxesPalette[PAL_INTERIOR] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_LIGHT2));
} else if (butPtr->selectBorder != NULL) {
boxesPalette[PAL_INTERIOR] = FlipColor(TkWinGetBorderPixels(tkwin,
butPtr->selectBorder, TK_3D_FLAT_GC));
} else {
boxesPalette[PAL_INTERIOR] = FlipColor(GetSysColor(COLOR_WINDOW));
}
boxesPalette[PAL_BACKGROUND] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_FLAT_GC));
dc = TkWinGetDrawableDC(butPtr->display, pixmap, &state);
StretchDIBits(dc, x, y, boxWidth, boxHeight, xSrc, ySrc,
boxWidth, boxHeight, boxesBits, (LPBITMAPINFO)boxesPtr,
DIB_RGB_COLORS, SRCCOPY);
TkWinReleaseDrawableDC(pixmap, dc, &state);
}
/*
* If the button is disabled with a stipple rather than a special
* foreground color, generate the stippled effect. If the widget
* is selected and we use a different background color when selected,
* must temporarily modify the GC.
*/
if ((butPtr->state == tkDisabledUid)
&& ((butPtr->disabledFg == NULL) || (butPtr->image != NULL))) {
if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
&& (butPtr->selectBorder != NULL)) {
XSetForeground(butPtr->display, butPtr->disabledGC,
Tk_3DBorderColor(butPtr->selectBorder)->pixel);
}
XFillRectangle(butPtr->display, pixmap, butPtr->disabledGC,
butPtr->inset, butPtr->inset,
(unsigned) (Tk_Width(tkwin) - 2*butPtr->inset),
(unsigned) (Tk_Height(tkwin) - 2*butPtr->inset));
if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
&& (butPtr->selectBorder != NULL)) {
XSetForeground(butPtr->display, butPtr->disabledGC,
Tk_3DBorderColor(butPtr->normalBorder)->pixel);
}
}
/*
* Draw the border and traversal highlight last. This way, if the
* button's contents overflow they'll be covered up by the border.
*/
if (relief != TK_RELIEF_FLAT) {
Tk_Draw3DRectangle(tkwin, pixmap, border,
defaultWidth, defaultWidth,
Tk_Width(tkwin) - 2*defaultWidth,
Tk_Height(tkwin) - 2*defaultWidth,
butPtr->borderWidth, relief);
}
if (defaultWidth != 0) {
dc = TkWinGetDrawableDC(butPtr->display, pixmap, &state);
TkWinFillRect(dc, 0, 0, Tk_Width(tkwin), defaultWidth,
butPtr->highlightColorPtr->pixel);
TkWinFillRect(dc, 0, 0, defaultWidth, Tk_Height(tkwin),
butPtr->highlightColorPtr->pixel);
TkWinFillRect(dc, 0, Tk_Height(tkwin) - defaultWidth,
Tk_Width(tkwin), defaultWidth,
butPtr->highlightColorPtr->pixel);
TkWinFillRect(dc, Tk_Width(tkwin) - defaultWidth, 0,
defaultWidth, Tk_Height(tkwin),
butPtr->highlightColorPtr->pixel);
TkWinReleaseDrawableDC(pixmap, dc, &state);
}
/*
* Copy the information from the off-screen pixmap onto the screen,
* then delete the pixmap.
*/
XCopyArea(butPtr->display, pixmap, Tk_WindowId(tkwin),
butPtr->copyGC, 0, 0, (unsigned) Tk_Width(tkwin),
(unsigned) Tk_Height(tkwin), 0, 0);
Tk_FreePixmap(butPtr->display, pixmap);
}
/*
*----------------------------------------------------------------------
*
* TkpComputeButtonGeometry --
*
* 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.
*
*----------------------------------------------------------------------
*/
void
TkpComputeButtonGeometry(butPtr)
register TkButton *butPtr; /* Button whose geometry may have changed. */
{
int width, height, avgWidth;
Tk_FontMetrics fm;
if (butPtr->highlightWidth < 0) {
butPtr->highlightWidth = 0;
}
butPtr->inset = butPtr->highlightWidth + butPtr->borderWidth;
butPtr->indicatorSpace = 0;
if (!boxesPtr) {
InitBoxes();
}
if (butPtr->image != NULL) {
Tk_SizeOfImage(butPtr->image, &width, &height);
imageOrBitmap:
if (butPtr->width > 0) {
width = butPtr->width;
}
if (butPtr->height > 0) {
height = butPtr->height;
}
if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn) {
butPtr->indicatorSpace = boxWidth * 2;
butPtr->indicatorDiameter = boxHeight;
}
} else if (butPtr->bitmap != None) {
Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
goto imageOrBitmap;
} else {
Tk_FreeTextLayout(butPtr->textLayout);
butPtr->textLayout = Tk_ComputeTextLayout(butPtr->tkfont,
butPtr->text, -1, butPtr->wrapLength, butPtr->justify, 0,
&butPtr->textWidth, &butPtr->textHeight);
width = butPtr->textWidth;
height = butPtr->textHeight;
avgWidth = Tk_TextWidth(butPtr->tkfont, "0", 1);
Tk_GetFontMetrics(butPtr->tkfont, &fm);
if (butPtr->width > 0) {
width = butPtr->width * avgWidth;
}
if (butPtr->height > 0) {
height = butPtr->height * fm.linespace;
}
if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn) {
butPtr->indicatorDiameter = boxHeight;
butPtr->indicatorSpace = butPtr->indicatorDiameter + avgWidth;
}
/*
* Increase the inset to allow for the focus ring.
*/
if (butPtr->type != TYPE_LABEL) {
butPtr->inset += 3;
}
}
/*
* When issuing the geometry request, add extra space for the indicator,
* if any, and for the border and padding, plus an extra pixel so the
* display can be offset by 1 pixel in either direction for the raised
* or lowered effect.
*/
if ((butPtr->image == NULL) && (butPtr->bitmap == None)) {
width += 2*butPtr->padX;
height += 2*butPtr->padY;
}
if ((butPtr->type == TYPE_BUTTON)
|| ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn)) {
width += 1;
height += 1;
}
Tk_GeometryRequest(butPtr->tkwin, (int) (width + butPtr->indicatorSpace
+ 2*butPtr->inset), (int) (height + 2*butPtr->inset));
Tk_SetInternalBorder(butPtr->tkwin, butPtr->inset);
}
/*
*----------------------------------------------------------------------
*
* ButtonProc --
*
* This function is call by Windows whenever an event occurs on
* a button control created by Tk.
*
* Results:
* Standard Windows return value.
*
* Side effects:
* May generate events.
*
*----------------------------------------------------------------------
*/
static LRESULT CALLBACK
ButtonProc(hwnd, message, wParam, lParam)
HWND hwnd;
UINT message;
WPARAM wParam;
LPARAM lParam;
{
LRESULT result;
WinButton *butPtr;
Tk_Window tkwin = Tk_HWNDToWindow(hwnd);
if (tkwin == NULL) {
panic("ButtonProc called on an invalid HWND");
}
butPtr = (WinButton *)((TkWindow*)tkwin)->instanceData;
switch(message) {
case WM_ERASEBKGND:
return 0;
case BM_GETCHECK:
if (((butPtr->info.type == TYPE_CHECK_BUTTON)
|| (butPtr->info.type == TYPE_RADIO_BUTTON))
&& butPtr->info.indicatorOn) {
return (butPtr->info.flags & SELECTED)
? BST_CHECKED : BST_UNCHECKED;
}
return 0;
case BM_GETSTATE: {
DWORD state = 0;
if (((butPtr->info.type == TYPE_CHECK_BUTTON)
|| (butPtr->info.type == TYPE_RADIO_BUTTON))
&& butPtr->info.indicatorOn) {
state = (butPtr->info.flags & SELECTED)
? BST_CHECKED : BST_UNCHECKED;
}
if (butPtr->info.flags & GOT_FOCUS) {
state |= BST_FOCUS;
}
return state;
}
case WM_ENABLE:
break;
case WM_PAINT: {
PAINTSTRUCT ps;
BeginPaint(hwnd, &ps);
EndPaint(hwnd, &ps);
TkpDisplayButton((ClientData)butPtr);
return 0;
}
case BN_CLICKED: {
int code;
Tcl_Interp *interp = butPtr->info.interp;
if (butPtr->info.state != tkDisabledUid) {
Tcl_Preserve((ClientData)interp);
code = TkInvokeButton((TkButton*)butPtr);
if (code != TCL_OK && code != TCL_CONTINUE
&& code != TCL_BREAK) {
Tcl_AddErrorInfo(interp, "\n (button invoke)");
Tcl_BackgroundError(interp);
}
Tcl_Release((ClientData)interp);
}
Tcl_ServiceAll();
return 0;
}
default:
if (Tk_TranslateWinEvent(hwnd, message, wParam, lParam, &result)) {
return result;
}
}
return DefWindowProc(hwnd, message, wParam, lParam);
}