Initial revision

1 files changed, 811 insertions, 0 deletions

diff --git a/win/tkWinButton.c b/win/tkWinButton.c
new file mode 100644
index 0000000..47a74e6
--- /dev/null
+++ b/win/tkWinButton.c
@@ -0,0 +1,811 @@
+/* 
+ * 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);
+}