path: root/unix/tkUnixButton.c

/*
 * tkUnixButton.c --
 *
 *	This file implements the Unix specific portion of the button widgets.
 *
 * Copyright (c) 1996-1997 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.
 */

#include "tkInt.h"
#include "tkButton.h"
#include "tk3d.h"

/*
 * Shared with menu widget.
 */

MODULE_SCOPE void	TkpDrawCheckIndicator(Tk_Window tkwin,
			    Display *display, Drawable d, int x, int y,
			    Tk_3DBorder bgBorder, XColor *indicatorColor,
			    XColor *selectColor, XColor *disColor, int on,
			    int disabled, int mode);

/*
 * Declaration of Unix specific button structure.
 */

typedef struct UnixButton {
    TkButton info;		/* Generic button info. */
} UnixButton;

/*
 * The class function table for the button widgets.
 */

const Tk_ClassProcs tkpButtonProcs = {
    sizeof(Tk_ClassProcs),	/* size */
    TkButtonWorldChanged,	/* worldChangedProc */
    NULL,					/* createProc */
    NULL					/* modalProc */
};

/*
 * The button image.
 * The header info here is ignored, it's the image that's important. The
 * colors will be applied as follows:
 *   A = Background
 *   B = Background
 *   C = 3D light
 *   D = selectColor
 *   E = 3D dark
 *   F = Background
 *   G = Indicator Color
 *   H = disabled Indicator Color
 */

/* XPM */
static const char *const button_images[] = {
    /* width height ncolors chars_per_pixel */
    "52 26 7 1",
    /* colors */
    "A c #808000000000",
    "B c #000080800000",
    "C c #808080800000",
    "D c #000000008080",
    "E c #808000008080",
    "F c #000080808080",
    "G c #000000000000",
    "H c #000080800000",
    /* pixels */
    "AAAAAAAAAAAABAAAAAAAAAAAABAAAAAAAAAAAABAAAAAAAAAAAAB",
    "AEEEEEEEEEECBAEEEEEEEEEECBAEEEEEEEEEECBAEEEEEEEEEECB",
    "AEDDDDDDDDDCBAEDDDDDDDDDCBAEFFFFFFFFFCBAEFFFFFFFFFCB",
    "AEDDDDDDDDDCBAEDDDDDDDGDCBAEFFFFFFFFFCBAEFFFFFFFHFCB",
    "AEDDDDDDDDDCBAEDDDDDDGGDCBAEFFFFFFFFFCBAEFFFFFFHHFCB",
    "AEDDDDDDDDDCBAEDGDDDGGGDCBAEFFFFFFFFFCBAEFHFFFHHHFCB",
    "AEDDDDDDDDDCBAEDGGDGGGDDCBAEFFFFFFFFFCBAEFHHFHHHFFCB",
    "AEDDDDDDDDDCBAEDGGGGGDDDCBAEFFFFFFFFFCBAEFHHHHHFFFCB",
    "AEDDDDDDDDDCBAEDDGGGDDDDCBAEFFFFFFFFFCBAEFFHHHFFFFCB",
    "AEDDDDDDDDDCBAEDDDGDDDDDCBAEFFFFFFFFFCBAEFFFHFFFFFCB",
    "AEDDDDDDDDDCBAEDDDDDDDDDCBAEFFFFFFFFFCBAEFFFFFFFFFCB",
    "ACCCCCCCCCCCBACCCCCCCCCCCBACCCCCCCCCCCBACCCCCCCCCCCB",
    "BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB",
    "FFFFAAAAFFFFFFFFFAAAAFFFFFFFFFAAAAFFFFFFFFFAAAAFFFFF",
    "FFAAEEEEAAFFFFFAAEEEEAAFFFFFAAEEEEAAFFFFFAAEEEEAAFFF",
    "FAEEDDDDEEBFFFAEEDDDDEEBFFFAEEFFFFEEBFFFAEEFFFFEEBFF",
    "FAEDDDDDDCBFFFAEDDDDDDCBFFFAEFFFFFFCBFFFAEFFFFFFCBFF",
    "AEDDDDDDDDCBFAEDDDGGDDDCBFAEFFFFFFFFCBFAEFFFHHFFFCBF",
    "AEDDDDDDDDCBFAEDDGGGGDDCBFAEFFFFFFFFCBFAEFFHHHHFFCBF",
    "AEDDDDDDDDCBFAEDDGGGGDDCBFAEFFFFFFFFCBFAEFFHHHHFFCBF",
    "AEDDDDDDDDCBFAEDDDGGDDDCBFAEFFFFFFFFCBFAEFFFHHFFFCBF",
    "FAEDDDDDDCBFFFAEDDDDDDCBFFFAEFFFFFFCBFFFAEFFFFFFCBFF",
    "FACCDDDDCCBFFFACCDDDDCCBFFFACCFFFFCCBFFFACCFFFFCCBFF",
    "FFBBCCCCBBFFFFFBBCCCCBBFFFFFBBCCCCBBFFFFFBBCCCCBBFFF",
    "FFFFBBBBFFFFFFFFFBBBBFFFFFFFFFBBBBFFFFFFFFFBBBBFFFFF",
    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF",
};

/*
 * Sizes and offsets into above XPM file.
 */

#define CHECK_BUTTON_DIM    13
#define CHECK_MENU_DIM       9
#define CHECK_START          9
#define CHECK_ON_OFFSET     13
#define CHECK_OFF_OFFSET     0
#define CHECK_DISON_OFFSET  39
#define CHECK_DISOFF_OFFSET 26
#define RADIO_BUTTON_DIM    12
#define RADIO_MENU_DIM       6
#define RADIO_WIDTH         13
#define RADIO_START         22
#define RADIO_ON_OFFSET     13
#define RADIO_OFF_OFFSET     0
#define RADIO_DISON_OFFSET  39
#define RADIO_DISOFF_OFFSET 26

/*
 * Indicator Draw Modes
 */

#define CHECK_BUTTON 0
#define CHECK_MENU   1
#define RADIO_BUTTON 2
#define RADIO_MENU   3

/*
 *----------------------------------------------------------------------
 *
 * TkpDrawCheckIndicator -
 *
 *	Draws the checkbox image in the drawable at the (x,y) location, value,
 *	and state given. This routine is use by the button and menu widgets
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	An image is drawn in the drawable at the location given.
 *
 *----------------------------------------------------------------------
 */

void
TkpDrawCheckIndicator(
    Tk_Window tkwin,		/* handle for resource alloc */
    Display *display,
    Drawable d,			/* what to draw on */
    int x, int y,		/* where to draw */
    Tk_3DBorder bgBorder,	/* colors of the border */
    XColor *indicatorColor,	/* color of the indicator */
    XColor *selectColor,	/* color when selected */
    XColor *disableColor,	/* color when disabled */
    int on,			/* are we on? */
    int disabled,		/* are we disabled? */
    int mode)			/* kind of indicator to draw */
{
    int ix, iy;
    int dim;
    int imgsel, imgstart;
    TkBorder *bg_brdr = (TkBorder*)bgBorder;
    XGCValues gcValues;
    GC copyGC;
    unsigned long imgColors[8];
    XImage *img;
    Pixmap pixmap;
    int depth;

    /*
     * Sanity check.
     */

    if (tkwin == NULL || display == None || d == None || bgBorder == NULL
	    || indicatorColor == NULL) {
	return;
    }

    if (disableColor == NULL) {
	disableColor = bg_brdr->bgColorPtr;
    }

    if (selectColor == NULL) {
	selectColor = bg_brdr->bgColorPtr;
    }

    depth = Tk_Depth(tkwin);

    /*
     * Compute starting point and dimensions of image inside button_images to
     * be used.
     */

    switch (mode) {
    default:
    case CHECK_BUTTON:
	imgsel = on == 2 ? CHECK_DISON_OFFSET :
		on == 1 ? CHECK_ON_OFFSET : CHECK_OFF_OFFSET;
	imgsel += disabled && on != 2 ? CHECK_DISOFF_OFFSET : 0;
	imgstart = CHECK_START;
	dim = CHECK_BUTTON_DIM;
	break;

    case CHECK_MENU:
	imgsel = on == 2 ? CHECK_DISOFF_OFFSET :
		on == 1 ? CHECK_ON_OFFSET : CHECK_OFF_OFFSET;
	imgsel += disabled && on != 2 ? CHECK_DISOFF_OFFSET : 0;
	imgstart = CHECK_START + 2;
	imgsel += 2;
	dim = CHECK_MENU_DIM;
	break;

    case RADIO_BUTTON:
	imgsel = on == 2 ? RADIO_DISON_OFFSET :
		on==1 ? RADIO_ON_OFFSET : RADIO_OFF_OFFSET;
	imgsel += disabled && on != 2 ? RADIO_DISOFF_OFFSET : 0;
	imgstart = RADIO_START;
	dim = RADIO_BUTTON_DIM;
	break;

    case RADIO_MENU:
	imgsel = on == 2 ? RADIO_DISOFF_OFFSET :
		on==1 ? RADIO_ON_OFFSET : RADIO_OFF_OFFSET;
	imgsel += disabled && on != 2 ? RADIO_DISOFF_OFFSET : 0;
	imgstart = RADIO_START + 3;
	imgsel += 3;
	dim = RADIO_MENU_DIM;
	break;
    }

    /*
     * Allocate the drawing areas to use. Note that we use double-buffering
     * here because not all code paths leading to this function do so.
     */

    pixmap = Tk_GetPixmap(display, d, dim, dim, depth);
    if (pixmap == None) {
	return;
    }

    x -= dim/2;
    y -= dim/2;

    img = XGetImage(display, pixmap, 0, 0,
	    (unsigned int)dim, (unsigned int)dim, AllPlanes, ZPixmap);
    if (img == NULL) {
	return;
    }

    /*
     * Set up the color mapping table.
     */

    TkpGetShadows(bg_brdr, tkwin);

    imgColors[0 /*A*/] =
	    Tk_GetColorByValue(tkwin, bg_brdr->bgColorPtr)->pixel;
    imgColors[1 /*B*/] =
	    Tk_GetColorByValue(tkwin, bg_brdr->bgColorPtr)->pixel;
    imgColors[2 /*C*/] = (bg_brdr->lightColorPtr != NULL) ?
	    Tk_GetColorByValue(tkwin, bg_brdr->lightColorPtr)->pixel :
	    WhitePixelOfScreen(bg_brdr->screen);
    imgColors[3 /*D*/] =
	    Tk_GetColorByValue(tkwin, selectColor)->pixel;
    imgColors[4 /*E*/] = (bg_brdr->darkColorPtr != NULL) ?
	    Tk_GetColorByValue(tkwin, bg_brdr->darkColorPtr)->pixel :
	    BlackPixelOfScreen(bg_brdr->screen);
    imgColors[5 /*F*/] =
	    Tk_GetColorByValue(tkwin, bg_brdr->bgColorPtr)->pixel;
    imgColors[6 /*G*/] =
	    Tk_GetColorByValue(tkwin, indicatorColor)->pixel;
    imgColors[7 /*H*/] =
	    Tk_GetColorByValue(tkwin, disableColor)->pixel;

    /*
     * Create the image, painting it into an XImage one pixel at a time.
     */

    for (iy=0 ; iy<dim ; iy++) {
	for (ix=0 ; ix<dim ; ix++) {
	    XPutPixel(img, ix, iy,
		    imgColors[button_images[imgstart+iy][imgsel+ix] - 'A']);
	}
    }

    /*
     * Copy onto our target drawable surface.
     */

    memset(&gcValues, 0, sizeof(gcValues));
    gcValues.background = bg_brdr->bgColorPtr->pixel;
    gcValues.graphics_exposures = False;
    copyGC = Tk_GetGC(tkwin, 0, &gcValues);

    XPutImage(display, pixmap, copyGC, img, 0, 0, 0, 0,
	    (unsigned)dim, (unsigned)dim);
    XCopyArea(display, pixmap, d, copyGC, 0, 0,
	    (unsigned)dim, (unsigned)dim, x, y);

    /*
     * Tidy up.
     */

    Tk_FreeGC(display, copyGC);
    XDestroyImage(img);
    Tk_FreePixmap(display, pixmap);
}

/*
 *----------------------------------------------------------------------
 *
 * TkpCreateButton --
 *
 *	Allocate a new TkButton structure.
 *
 * Results:
 *	Returns a newly allocated TkButton structure.
 *
 * Side effects:
 *	Registers an event handler for the widget.
 *
 *----------------------------------------------------------------------
 */

TkButton *
TkpCreateButton(
    Tk_Window tkwin)
{
    UnixButton *butPtr = ckalloc(sizeof(UnixButton));

    return (TkButton *) butPtr;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpDisplayButton --
 *
 *	This function is invoked to display a button widget. It is normally
 *	invoked as an idle handler.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Commands are output to X to display the button in its current mode.
 *	The REDRAW_PENDING flag is cleared.
 *
 *----------------------------------------------------------------------
 */

void
TkpDisplayButton(
    ClientData clientData)	/* Information about widget. */
{
    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;
    Tk_Window tkwin = butPtr->tkwin;
    int width = 0, height = 0, fullWidth, fullHeight;
    int textXOffset, textYOffset;
    int haveImage = 0, haveText = 0;
    int offset;			/* 1 means this is a button widget, so we
				 * offset the text to make the button appear
				 * to move up and down as the relief
				 * changes. */
    int imageWidth, imageHeight;
    int imageXOffset = 0, imageYOffset = 0;
				/* image information that will be used to
				 * restrict disabled pixmap as well */

    butPtr->flags &= ~REDRAW_PENDING;
    if ((butPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
	return;
    }

    border = butPtr->normalBorder;
    if ((butPtr->state == STATE_DISABLED) && (butPtr->disabledFg != NULL)) {
	gc = butPtr->disabledGC;
    } else if ((butPtr->state == STATE_ACTIVE)
	    && !Tk_StrictMotif(butPtr->tkwin)) {
	gc = butPtr->activeTextGC;
	border = butPtr->activeBorder;
    } else {
	gc = butPtr->normalTextGC;
    }
    if ((butPtr->flags & SELECTED) && (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. The new relief is as follows:
     *      If the button is select  --> "sunken"
     *      If relief==overrelief    --> relief
     *      Otherwise                --> overrelief
     *
     * The effect we are trying to achieve is as follows:
     *
     *      value    mouse-over?   -->   relief
     *     -------  ------------        --------
     *       off        no               flat
     *       off        yes              raised
     *       on         no               sunken
     *       on         yes              sunken
     *
     * This is accomplished by configuring the checkbutton or radiobutton like
     * this:
     *
     *     -indicatoron 0 -overrelief raised -offrelief flat
     *
     * Bindings (see library/button.tcl) will copy the -overrelief into
     * -relief on mouseover. Hence, we can tell if we are in mouse-over by
     * comparing relief against overRelief. This is an aweful kludge, but it
     * gives use the desired behavior while keeping the code backwards
     * compatible.
     */

    relief = butPtr->relief;
    if ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn) {
	if (butPtr->flags & SELECTED) {
	    relief = TK_RELIEF_SUNKEN;
	} else if (butPtr->overRelief != relief) {
	    relief = butPtr->offRelief;
	}
    }

    offset = (butPtr->type == TYPE_BUTTON) && !Tk_StrictMotif(butPtr->tkwin);

    /*
     * In order to avoid screen flashes, this function 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-screen 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 != NULL) {
	Tk_SizeOfImage(butPtr->image, &width, &height);
	haveImage = 1;
    } else if (butPtr->bitmap != None) {
	Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
	haveImage = 1;
    }
    imageWidth = width;
    imageHeight = height;

    haveText = (butPtr->textWidth != 0 && butPtr->textHeight != 0);

    if (butPtr->compound != COMPOUND_NONE && haveImage && haveText) {
	textXOffset = 0;
	textYOffset = 0;
	fullWidth = 0;
	fullHeight = 0;

	switch ((enum compound) butPtr->compound) {
	case COMPOUND_TOP:
	case COMPOUND_BOTTOM:
	    /*
	     * Image is above or below text.
	     */

	    if (butPtr->compound == COMPOUND_TOP) {
		textYOffset = height + butPtr->padY;
	    } else {
		imageYOffset = butPtr->textHeight + butPtr->padY;
	    }
	    fullHeight = height + butPtr->textHeight + butPtr->padY;
	    fullWidth = (width > butPtr->textWidth ? width :
		    butPtr->textWidth);
	    textXOffset = (fullWidth - butPtr->textWidth)/2;
	    imageXOffset = (fullWidth - width)/2;
	    break;
	case COMPOUND_LEFT:
	case COMPOUND_RIGHT:
	    /*
	     * Image is left or right of text.
	     */

	    if (butPtr->compound == COMPOUND_LEFT) {
		textXOffset = width + butPtr->padX;
	    } else {
		imageXOffset = butPtr->textWidth + butPtr->padX;
	    }
	    fullWidth = butPtr->textWidth + butPtr->padX + width;
	    fullHeight = (height > butPtr->textHeight ? height :
		    butPtr->textHeight);
	    textYOffset = (fullHeight - butPtr->textHeight)/2;
	    imageYOffset = (fullHeight - height)/2;
	    break;
	case COMPOUND_CENTER:
	    /*
	     * Image and text are superimposed.
	     */

	    fullWidth = (width > butPtr->textWidth ? width :
		    butPtr->textWidth);
	    fullHeight = (height > butPtr->textHeight ? height :
		    butPtr->textHeight);
	    textXOffset = (fullWidth - butPtr->textWidth)/2;
	    imageXOffset = (fullWidth - width)/2;
	    textYOffset = (fullHeight - butPtr->textHeight)/2;
	    imageYOffset = (fullHeight - height)/2;
	    break;
	case COMPOUND_NONE:
	    break;
	}

	TkComputeAnchor(butPtr->anchor, tkwin, butPtr->padX, butPtr->padY,
		butPtr->indicatorSpace + fullWidth, fullHeight, &x, &y);

	x += butPtr->indicatorSpace;

	x += offset;
	y += offset;
	if (relief == TK_RELIEF_RAISED) {
	    x -= offset;
	    y -= offset;
	} else if (relief == TK_RELIEF_SUNKEN) {
	    x += offset;
	    y += offset;
	}

	imageXOffset += x;
	imageYOffset += y;

	if (butPtr->image != NULL) {
	    /*
	     * Do boundary clipping, so that Tk_RedrawImage is passed valid
	     * coordinates. [Bug 979239]
	     */

	    if (imageXOffset < 0) {
		imageXOffset = 0;
	    }
	    if (imageYOffset < 0) {
		imageYOffset = 0;
	    }
	    if (width > Tk_Width(tkwin)) {
		width = Tk_Width(tkwin);
	    }
	    if (height > Tk_Height(tkwin)) {
		height = Tk_Height(tkwin);
	    }
	    if ((width + imageXOffset) > Tk_Width(tkwin)) {
		imageXOffset = Tk_Width(tkwin) - width;
	    }
	    if ((height + imageYOffset) > Tk_Height(tkwin)) {
		imageYOffset = Tk_Height(tkwin) - height;
	    }

	    if ((butPtr->selectImage != NULL) && (butPtr->flags & SELECTED)) {
		Tk_RedrawImage(butPtr->selectImage, 0, 0,
			width, height, pixmap, imageXOffset, imageYOffset);
	    } else if ((butPtr->tristateImage != NULL) && (butPtr->flags & TRISTATED)) {
		Tk_RedrawImage(butPtr->tristateImage, 0, 0,
			width, height, pixmap, imageXOffset, imageYOffset);
	    } else {
		Tk_RedrawImage(butPtr->image, 0, 0, width,
			height, pixmap, imageXOffset, imageYOffset);
	    }
	} else {
	    XSetClipOrigin(butPtr->display, gc, imageXOffset, imageYOffset);
	    XCopyPlane(butPtr->display, butPtr->bitmap, pixmap, gc,
		    0, 0, (unsigned int) width, (unsigned int) height,
		    imageXOffset, imageYOffset, 1);
	    XSetClipOrigin(butPtr->display, gc, 0, 0);
	}

	Tk_DrawTextLayout(butPtr->display, pixmap, gc,
		butPtr->textLayout, x + textXOffset, y + textYOffset, 0, -1);
	Tk_UnderlineTextLayout(butPtr->display, pixmap, gc,
		butPtr->textLayout, x + textXOffset, y + textYOffset,
		butPtr->underline);
	y += fullHeight/2;
    } else {
	if (haveImage) {
	    TkComputeAnchor(butPtr->anchor, tkwin, 0, 0,
		    butPtr->indicatorSpace + width, height, &x, &y);
	    x += butPtr->indicatorSpace;

	    x += offset;
	    y += offset;
	    if (relief == TK_RELIEF_RAISED) {
		x -= offset;
		y -= offset;
	    } else if (relief == TK_RELIEF_SUNKEN) {
		x += offset;
		y += offset;
	    }
	    imageXOffset += x;
	    imageYOffset += y;
	    if (butPtr->image != NULL) {
		/*
		 * Do boundary clipping, so that Tk_RedrawImage is passed
		 * valid coordinates. [Bug 979239]
		 */

		if (imageXOffset < 0) {
		    imageXOffset = 0;
		}
		if (imageYOffset < 0) {
		    imageYOffset = 0;
		}
		if (width > Tk_Width(tkwin)) {
		    width = Tk_Width(tkwin);
		}
		if (height > Tk_Height(tkwin)) {
		    height = Tk_Height(tkwin);
		}
		if ((width + imageXOffset) > Tk_Width(tkwin)) {
		    imageXOffset = Tk_Width(tkwin) - width;
		}
		if ((height + imageYOffset) > Tk_Height(tkwin)) {
		    imageYOffset = Tk_Height(tkwin) - height;
		}

		if ((butPtr->selectImage != NULL) &&
			(butPtr->flags & SELECTED)) {
		    Tk_RedrawImage(butPtr->selectImage, 0, 0, width,
			    height, pixmap, imageXOffset, imageYOffset);
		} else if ((butPtr->tristateImage != NULL) &&
			(butPtr->flags & TRISTATED)) {
		    Tk_RedrawImage(butPtr->tristateImage, 0, 0, width,
			    height, pixmap, imageXOffset, imageYOffset);
		} else {
		    Tk_RedrawImage(butPtr->image, 0, 0, width, height, pixmap,
			    imageXOffset, imageYOffset);
		}
	    } 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 {
 	    TkComputeAnchor(butPtr->anchor, tkwin, butPtr->padX, butPtr->padY,
		    butPtr->indicatorSpace + butPtr->textWidth,
		    butPtr->textHeight, &x, &y);

	    x += butPtr->indicatorSpace;

	    x += offset;
	    y += offset;
	    if (relief == TK_RELIEF_RAISED) {
		x -= offset;
		y -= offset;
	    } else 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);
	    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) {
	if (butPtr->indicatorDiameter > 2*butPtr->borderWidth) {
	    TkBorder *selBorder = (TkBorder *) butPtr->selectBorder;
	    XColor *selColor = NULL;

	    if (selBorder != NULL) {
		selColor = selBorder->bgColorPtr;
	    }
	    x -= butPtr->indicatorSpace/2;
	    y = Tk_Height(tkwin)/2;
	    TkpDrawCheckIndicator(tkwin, butPtr->display, pixmap, x, y,
		    border, butPtr->normalFg, selColor, butPtr->disabledFg,
		    ((butPtr->flags & SELECTED) ? 1 :
			    (butPtr->flags & TRISTATED) ? 2 : 0),
		    (butPtr->state == STATE_DISABLED), CHECK_BUTTON);
	}
    } else if ((butPtr->type == TYPE_RADIO_BUTTON) && butPtr->indicatorOn) {
	if (butPtr->indicatorDiameter > 2*butPtr->borderWidth) {
	    TkBorder *selBorder = (TkBorder *) butPtr->selectBorder;
	    XColor *selColor = NULL;

	    if (selBorder != NULL) {
		selColor = selBorder->bgColorPtr;
	    }
	    x -= butPtr->indicatorSpace/2;
	    y = Tk_Height(tkwin)/2;
	    TkpDrawCheckIndicator(tkwin, butPtr->display, pixmap, x, y,
		    border, butPtr->normalFg, selColor, butPtr->disabledFg,
		    ((butPtr->flags & SELECTED) ? 1 :
			    (butPtr->flags & TRISTATED) ? 2 : 0),
		    (butPtr->state == STATE_DISABLED), RADIO_BUTTON);
	}
    }

    /*
     * 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 so the stippling is the right color.
     */

    if ((butPtr->state == STATE_DISABLED)
	    && ((butPtr->disabledFg == NULL) || (butPtr->image != NULL))) {
	if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
		&& (butPtr->selectBorder != NULL)) {
	    XSetForeground(butPtr->display, butPtr->stippleGC,
		    Tk_3DBorderColor(butPtr->selectBorder)->pixel);
	}

	/*
	 * Stipple the whole button if no disabledFg was specified, otherwise
	 * restrict stippling only to displayed image
	 */

	if (butPtr->disabledFg == NULL) {
	    XFillRectangle(butPtr->display, pixmap, butPtr->stippleGC, 0, 0,
		    (unsigned) Tk_Width(tkwin), (unsigned) Tk_Height(tkwin));
	} else {
	    XFillRectangle(butPtr->display, pixmap, butPtr->stippleGC,
		    imageXOffset, imageYOffset,
		    (unsigned) imageWidth, (unsigned) imageHeight);
	}
	if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
		&& (butPtr->selectBorder != NULL)) {
	    XSetForeground(butPtr->display, butPtr->stippleGC,
		    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. This code is
     * complicated by the possible combinations of focus highlight and default
     * rings. We draw the focus and highlight rings using the highlight border
     * and highlight foreground color.
     */

    if (relief != TK_RELIEF_FLAT) {
	int inset = butPtr->highlightWidth;

	if (butPtr->defaultState == DEFAULT_ACTIVE) {
	    /*
	     * Draw the default ring with 2 pixels of space between the
	     * default ring and the button and the default ring and the focus
	     * ring. Note that we need to explicitly draw the space in the
	     * highlightBorder color to ensure that we overwrite any overflow
	     * text and/or a different button background color.
	     */

	    Tk_Draw3DRectangle(tkwin, pixmap, butPtr->highlightBorder, inset,
		    inset, Tk_Width(tkwin) - 2*inset,
		    Tk_Height(tkwin) - 2*inset, 2, TK_RELIEF_FLAT);
	    inset += 2;
	    Tk_Draw3DRectangle(tkwin, pixmap, butPtr->highlightBorder, inset,
		    inset, Tk_Width(tkwin) - 2*inset,
		    Tk_Height(tkwin) - 2*inset, 1, TK_RELIEF_SUNKEN);
	    inset++;
	    Tk_Draw3DRectangle(tkwin, pixmap, butPtr->highlightBorder, inset,
		    inset, Tk_Width(tkwin) - 2*inset,
		    Tk_Height(tkwin) - 2*inset, 2, TK_RELIEF_FLAT);

	    inset += 2;
	} else if (butPtr->defaultState == DEFAULT_NORMAL) {
	    /*
	     * Leave room for the default ring and write over any text or
	     * background color.
	     */

	    Tk_Draw3DRectangle(tkwin, pixmap, butPtr->highlightBorder, 0,
		    0, Tk_Width(tkwin), Tk_Height(tkwin), 5, TK_RELIEF_FLAT);
	    inset += 5;
	}

	/*
	 * Draw the button border.
	 */

	Tk_Draw3DRectangle(tkwin, pixmap, border, inset, inset,
		Tk_Width(tkwin) - 2*inset, Tk_Height(tkwin) - 2*inset,
		butPtr->borderWidth, relief);
    }
    if (butPtr->highlightWidth > 0) {
	GC gc;

	if (butPtr->flags & GOT_FOCUS) {
	    gc = Tk_GCForColor(butPtr->highlightColorPtr, pixmap);
	} else {
	    gc = Tk_GCForColor(Tk_3DBorderColor(butPtr->highlightBorder),
		    pixmap);
	}

	/*
	 * Make sure the focus ring shrink-wraps the actual button, not the
	 * padding space left for a default ring.
	 */

	if (butPtr->defaultState == DEFAULT_NORMAL) {
	    TkDrawInsetFocusHighlight(tkwin, gc, butPtr->highlightWidth,
		    pixmap, 5);
	} else {
	    Tk_DrawFocusHighlight(tkwin, gc, butPtr->highlightWidth, pixmap);
	}
    }

    /*
     * 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 function 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(
    register TkButton *butPtr)	/* Button whose geometry may have changed. */
{
    int width, height, avgWidth, txtWidth, txtHeight;
    int haveImage = 0, haveText = 0;
    Tk_FontMetrics fm;

    butPtr->inset = butPtr->highlightWidth + butPtr->borderWidth;

    /*
     * Leave room for the default ring if needed.
     */

    if (butPtr->defaultState != DEFAULT_DISABLED) {
	butPtr->inset += 5;
    }
    butPtr->indicatorSpace = 0;

    width = 0;
    height = 0;
    txtWidth = 0;
    txtHeight = 0;
    avgWidth = 0;

    if (butPtr->image != NULL) {
	Tk_SizeOfImage(butPtr->image, &width, &height);
	haveImage = 1;
    } else if (butPtr->bitmap != None) {
	Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
	haveImage = 1;
    }

    if (haveImage == 0 || butPtr->compound != COMPOUND_NONE) {
	Tk_FreeTextLayout(butPtr->textLayout);

	butPtr->textLayout = Tk_ComputeTextLayout(butPtr->tkfont,
		Tcl_GetString(butPtr->textPtr), -1, butPtr->wrapLength,
		butPtr->justify, 0, &butPtr->textWidth, &butPtr->textHeight);

	txtWidth = butPtr->textWidth;
	txtHeight = butPtr->textHeight;
	avgWidth = Tk_TextWidth(butPtr->tkfont, "0", 1);
	Tk_GetFontMetrics(butPtr->tkfont, &fm);
	haveText = (txtWidth != 0 && txtHeight != 0);
    }

    /*
     * If the button is compound (i.e., it shows both an image and text), the
     * new geometry is a combination of the image and text geometry. We only
     * honor the compound bit if the button has both text and an image,
     * because otherwise it is not really a compound button.
     */

    if (butPtr->compound != COMPOUND_NONE && haveImage && haveText) {
	switch ((enum compound) butPtr->compound) {
	case COMPOUND_TOP:
	case COMPOUND_BOTTOM:
	    /*
	     * Image is above or below text.
	     */

	    height += txtHeight + butPtr->padY;
	    width = (width > txtWidth ? width : txtWidth);
	    break;
	case COMPOUND_LEFT:
	case COMPOUND_RIGHT:
	    /*
	     * Image is left or right of text.
	     */

	    width += txtWidth + butPtr->padX;
	    height = (height > txtHeight ? height : txtHeight);
	    break;
	case COMPOUND_CENTER:
	    /*
	     * Image and text are superimposed.
	     */

	    width = (width > txtWidth ? width : txtWidth);
	    height = (height > txtHeight ? height : txtHeight);
	    break;
	case COMPOUND_NONE:
	    break;
	}
	if (butPtr->width > 0) {
	    width = butPtr->width;
	}
	if (butPtr->height > 0) {
	    height = butPtr->height;
	}

	if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn) {
	    butPtr->indicatorSpace = height;
	    if (butPtr->type == TYPE_CHECK_BUTTON) {
		butPtr->indicatorDiameter = (65*height)/100;
	    } else {
		butPtr->indicatorDiameter = (75*height)/100;
	    }
	}

	width += 2*butPtr->padX;
	height += 2*butPtr->padY;
    } else {
	if (haveImage) {
	    if (butPtr->width > 0) {
		width = butPtr->width;
	    }
	    if (butPtr->height > 0) {
		height = butPtr->height;
	    }

	    if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn) {
		butPtr->indicatorSpace = height;
		if (butPtr->type == TYPE_CHECK_BUTTON) {
		    butPtr->indicatorDiameter = (65*height)/100;
		} else {
		    butPtr->indicatorDiameter = (75*height)/100;
		}
	    }
	} else {
	    width = txtWidth;
	    height = txtHeight;

	    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 = fm.linespace;
		if (butPtr->type == TYPE_CHECK_BUTTON) {
		    butPtr->indicatorDiameter =
			(80*butPtr->indicatorDiameter)/100;
		}
		butPtr->indicatorSpace = butPtr->indicatorDiameter + avgWidth;
	    }
	}
    }

    /*
     * When issuing the geometry request, add extra space for the indicator,
     * if any, and for the border and padding, plus two extra pixels 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) && !Tk_StrictMotif(butPtr->tkwin)) {
	width += 2;
	height += 2;
    }
    Tk_GeometryRequest(butPtr->tkwin, (int) (width + butPtr->indicatorSpace
	    + 2*butPtr->inset), (int) (height + 2*butPtr->inset));
    Tk_SetInternalBorder(butPtr->tkwin, butPtr->inset);
}

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */