479 lines
14 KiB
C
479 lines
14 KiB
C
/*
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* tkUnixButton.c --
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*
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* This file implements the Unix specific portion of the button
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* widgets.
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*
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* Copyright (c) 1996 by Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* SCCS: @(#) tkUnixButton.c 1.4 97/06/06 11:21:40
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*/
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#include "tkButton.h"
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/*
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* Declaration of Unix specific button structure.
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*/
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typedef struct UnixButton {
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TkButton info; /* Generic button info. */
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} UnixButton;
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/*
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* The class procedure table for the button widgets.
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*/
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TkClassProcs tkpButtonProcs = {
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NULL, /* createProc. */
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TkButtonWorldChanged, /* geometryProc. */
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NULL /* modalProc. */
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};
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/*
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*----------------------------------------------------------------------
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*
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* TkpCreateButton --
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*
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* Allocate a new TkButton structure.
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*
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* Results:
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* Returns a newly allocated TkButton structure.
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*
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* Side effects:
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* Registers an event handler for the widget.
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*
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*----------------------------------------------------------------------
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*/
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TkButton *
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TkpCreateButton(tkwin)
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Tk_Window tkwin;
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{
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UnixButton *butPtr = (UnixButton *)ckalloc(sizeof(UnixButton));
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return (TkButton *) butPtr;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkpDisplayButton --
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*
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* This procedure is invoked to display a button widget. It is
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* normally invoked as an idle handler.
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*
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* Results:
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* None.
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*
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* Side effects:
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* Commands are output to X to display the button in its
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* current mode. The REDRAW_PENDING flag is cleared.
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*
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*----------------------------------------------------------------------
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*/
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void
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TkpDisplayButton(clientData)
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ClientData clientData; /* Information about widget. */
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{
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register TkButton *butPtr = (TkButton *) clientData;
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GC gc;
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Tk_3DBorder border;
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Pixmap pixmap;
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int x = 0; /* Initialization only needed to stop
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* compiler warning. */
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int y, relief;
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register Tk_Window tkwin = butPtr->tkwin;
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int width, height;
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int offset; /* 0 means this is a label widget. 1 means
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* it is a flavor of button, so we offset
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* the text to make the button appear to
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* move up and down as the relief changes. */
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butPtr->flags &= ~REDRAW_PENDING;
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if ((butPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
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return;
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}
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border = butPtr->normalBorder;
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if ((butPtr->state == tkDisabledUid) && (butPtr->disabledFg != NULL)) {
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gc = butPtr->disabledGC;
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} else if ((butPtr->state == tkActiveUid)
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&& !Tk_StrictMotif(butPtr->tkwin)) {
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gc = butPtr->activeTextGC;
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border = butPtr->activeBorder;
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} else {
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gc = butPtr->normalTextGC;
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}
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if ((butPtr->flags & SELECTED) && (butPtr->state != tkActiveUid)
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&& (butPtr->selectBorder != NULL) && !butPtr->indicatorOn) {
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border = butPtr->selectBorder;
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}
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/*
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* Override the relief specified for the button if this is a
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* checkbutton or radiobutton and there's no indicator.
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*/
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relief = butPtr->relief;
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if ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn) {
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relief = (butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN
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: TK_RELIEF_RAISED;
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}
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offset = (butPtr->type == TYPE_BUTTON) && !Tk_StrictMotif(butPtr->tkwin);
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/*
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* In order to avoid screen flashes, this procedure redraws
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* the button in a pixmap, then copies the pixmap to the
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* screen in a single operation. This means that there's no
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* point in time where the on-sreen image has been cleared.
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*/
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pixmap = Tk_GetPixmap(butPtr->display, Tk_WindowId(tkwin),
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Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin));
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Tk_Fill3DRectangle(tkwin, pixmap, border, 0, 0, Tk_Width(tkwin),
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Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
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/*
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* Display image or bitmap or text for button.
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*/
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if (butPtr->image != None) {
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Tk_SizeOfImage(butPtr->image, &width, &height);
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imageOrBitmap:
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TkComputeAnchor(butPtr->anchor, tkwin, 0, 0,
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butPtr->indicatorSpace + width, height, &x, &y);
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x += butPtr->indicatorSpace;
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x += offset;
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y += offset;
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if (relief == TK_RELIEF_RAISED) {
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x -= offset;
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y -= offset;
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} else if (relief == TK_RELIEF_SUNKEN) {
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x += offset;
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y += offset;
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}
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if (butPtr->image != NULL) {
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if ((butPtr->selectImage != NULL) && (butPtr->flags & SELECTED)) {
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Tk_RedrawImage(butPtr->selectImage, 0, 0, width, height, pixmap,
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x, y);
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} else {
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Tk_RedrawImage(butPtr->image, 0, 0, width, height, pixmap,
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x, y);
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}
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} else {
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XSetClipOrigin(butPtr->display, gc, x, y);
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XCopyPlane(butPtr->display, butPtr->bitmap, pixmap, gc, 0, 0,
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(unsigned int) width, (unsigned int) height, x, y, 1);
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XSetClipOrigin(butPtr->display, gc, 0, 0);
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}
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y += height/2;
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} else if (butPtr->bitmap != None) {
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Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
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goto imageOrBitmap;
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} else {
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TkComputeAnchor(butPtr->anchor, tkwin, butPtr->padX, butPtr->padY,
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butPtr->indicatorSpace + butPtr->textWidth, butPtr->textHeight,
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&x, &y);
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x += butPtr->indicatorSpace;
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x += offset;
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y += offset;
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if (relief == TK_RELIEF_RAISED) {
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x -= offset;
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y -= offset;
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} else if (relief == TK_RELIEF_SUNKEN) {
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x += offset;
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y += offset;
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}
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Tk_DrawTextLayout(butPtr->display, pixmap, gc, butPtr->textLayout,
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x, y, 0, -1);
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Tk_UnderlineTextLayout(butPtr->display, pixmap, gc,
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butPtr->textLayout, x, y, butPtr->underline);
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y += butPtr->textHeight/2;
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}
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/*
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* Draw the indicator for check buttons and radio buttons. At this
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* point x and y refer to the top-left corner of the text or image
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* or bitmap.
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*/
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if ((butPtr->type == TYPE_CHECK_BUTTON) && butPtr->indicatorOn) {
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int dim;
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dim = butPtr->indicatorDiameter;
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x -= butPtr->indicatorSpace;
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y -= dim/2;
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if (dim > 2*butPtr->borderWidth) {
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Tk_Draw3DRectangle(tkwin, pixmap, border, x, y, dim, dim,
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butPtr->borderWidth,
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(butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN :
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TK_RELIEF_RAISED);
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x += butPtr->borderWidth;
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y += butPtr->borderWidth;
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dim -= 2*butPtr->borderWidth;
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if (butPtr->flags & SELECTED) {
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GC gc;
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gc = Tk_3DBorderGC(tkwin,(butPtr->selectBorder != NULL)
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? butPtr->selectBorder : butPtr->normalBorder,
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TK_3D_FLAT_GC);
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XFillRectangle(butPtr->display, pixmap, gc, x, y,
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(unsigned int) dim, (unsigned int) dim);
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} else {
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Tk_Fill3DRectangle(tkwin, pixmap, butPtr->normalBorder, x, y,
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dim, dim, butPtr->borderWidth, TK_RELIEF_FLAT);
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}
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}
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} else if ((butPtr->type == TYPE_RADIO_BUTTON) && butPtr->indicatorOn) {
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XPoint points[4];
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int radius;
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radius = butPtr->indicatorDiameter/2;
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points[0].x = x - butPtr->indicatorSpace;
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points[0].y = y;
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points[1].x = points[0].x + radius;
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points[1].y = points[0].y + radius;
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points[2].x = points[1].x + radius;
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points[2].y = points[0].y;
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points[3].x = points[1].x;
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points[3].y = points[0].y - radius;
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if (butPtr->flags & SELECTED) {
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GC gc;
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gc = Tk_3DBorderGC(tkwin, (butPtr->selectBorder != NULL)
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? butPtr->selectBorder : butPtr->normalBorder,
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TK_3D_FLAT_GC);
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XFillPolygon(butPtr->display, pixmap, gc, points, 4, Convex,
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CoordModeOrigin);
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} else {
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Tk_Fill3DPolygon(tkwin, pixmap, butPtr->normalBorder, points,
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4, butPtr->borderWidth, TK_RELIEF_FLAT);
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}
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Tk_Draw3DPolygon(tkwin, pixmap, border, points, 4, butPtr->borderWidth,
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(butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN :
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TK_RELIEF_RAISED);
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}
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/*
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* If the button is disabled with a stipple rather than a special
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* foreground color, generate the stippled effect. If the widget
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* is selected and we use a different background color when selected,
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* must temporarily modify the GC.
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*/
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if ((butPtr->state == tkDisabledUid)
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&& ((butPtr->disabledFg == NULL) || (butPtr->image != NULL))) {
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if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
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&& (butPtr->selectBorder != NULL)) {
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XSetForeground(butPtr->display, butPtr->disabledGC,
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Tk_3DBorderColor(butPtr->selectBorder)->pixel);
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}
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XFillRectangle(butPtr->display, pixmap, butPtr->disabledGC,
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butPtr->inset, butPtr->inset,
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(unsigned) (Tk_Width(tkwin) - 2*butPtr->inset),
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(unsigned) (Tk_Height(tkwin) - 2*butPtr->inset));
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if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
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&& (butPtr->selectBorder != NULL)) {
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XSetForeground(butPtr->display, butPtr->disabledGC,
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Tk_3DBorderColor(butPtr->normalBorder)->pixel);
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}
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}
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/*
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* Draw the border and traversal highlight last. This way, if the
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* button's contents overflow they'll be covered up by the border.
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* This code is complicated by the possible combinations of focus
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* highlight and default rings. We draw the focus and highlight rings
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* using the highlight border and highlight foreground color.
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*/
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if (relief != TK_RELIEF_FLAT) {
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int inset = butPtr->highlightWidth;
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if (butPtr->defaultState == tkActiveUid) {
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/*
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* Draw the default ring with 2 pixels of space between the
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* default ring and the button and the default ring and the
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* focus ring. Note that we need to explicitly draw the space
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* in the highlightBorder color to ensure that we overwrite any
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* overflow text and/or a different button background color.
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*/
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Tk_Draw3DRectangle(tkwin, pixmap, butPtr->highlightBorder, inset,
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inset, Tk_Width(tkwin) - 2*inset,
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Tk_Height(tkwin) - 2*inset, 2, TK_RELIEF_FLAT);
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inset += 2;
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Tk_Draw3DRectangle(tkwin, pixmap, butPtr->highlightBorder, inset,
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inset, Tk_Width(tkwin) - 2*inset,
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Tk_Height(tkwin) - 2*inset, 1, TK_RELIEF_SUNKEN);
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inset++;
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Tk_Draw3DRectangle(tkwin, pixmap, butPtr->highlightBorder, inset,
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inset, Tk_Width(tkwin) - 2*inset,
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Tk_Height(tkwin) - 2*inset, 2, TK_RELIEF_FLAT);
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inset += 2;
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} else if (butPtr->defaultState == tkNormalUid) {
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/*
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* Leave room for the default ring and write over any text or
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* background color.
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*/
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Tk_Draw3DRectangle(tkwin, pixmap, butPtr->highlightBorder, 0,
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0, Tk_Width(tkwin),
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Tk_Height(tkwin), 5, TK_RELIEF_FLAT);
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inset += 5;
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}
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/*
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* Draw the button border.
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*/
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Tk_Draw3DRectangle(tkwin, pixmap, border, inset, inset,
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Tk_Width(tkwin) - 2*inset, Tk_Height(tkwin) - 2*inset,
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butPtr->borderWidth, relief);
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}
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if (butPtr->highlightWidth != 0) {
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GC gc;
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if (butPtr->flags & GOT_FOCUS) {
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gc = Tk_GCForColor(butPtr->highlightColorPtr, pixmap);
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} else {
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gc = Tk_GCForColor(Tk_3DBorderColor(butPtr->highlightBorder),
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pixmap);
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}
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/*
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* Make sure the focus ring shrink-wraps the actual button, not the
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* padding space left for a default ring.
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*/
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if (butPtr->defaultState == tkNormalUid) {
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TkDrawInsetFocusHighlight(tkwin, gc, butPtr->highlightWidth,
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pixmap, 5);
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} else {
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Tk_DrawFocusHighlight(tkwin, gc, butPtr->highlightWidth, pixmap);
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}
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}
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/*
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* Copy the information from the off-screen pixmap onto the screen,
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* then delete the pixmap.
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*/
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XCopyArea(butPtr->display, pixmap, Tk_WindowId(tkwin),
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butPtr->copyGC, 0, 0, (unsigned) Tk_Width(tkwin),
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(unsigned) Tk_Height(tkwin), 0, 0);
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Tk_FreePixmap(butPtr->display, pixmap);
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkpComputeButtonGeometry --
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*
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* After changes in a button's text or bitmap, this procedure
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* recomputes the button's geometry and passes this information
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* along to the geometry manager for the window.
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*
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* Results:
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* None.
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*
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* Side effects:
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* The button's window may change size.
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*
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*----------------------------------------------------------------------
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*/
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void
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TkpComputeButtonGeometry(butPtr)
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register TkButton *butPtr; /* Button whose geometry may have changed. */
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{
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int width, height, avgWidth;
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Tk_FontMetrics fm;
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if (butPtr->highlightWidth < 0) {
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butPtr->highlightWidth = 0;
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}
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butPtr->inset = butPtr->highlightWidth + butPtr->borderWidth;
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/*
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* Leave room for the default ring if needed.
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*/
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if (butPtr->defaultState != tkDisabledUid) {
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butPtr->inset += 5;
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}
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butPtr->indicatorSpace = 0;
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if (butPtr->image != NULL) {
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Tk_SizeOfImage(butPtr->image, &width, &height);
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imageOrBitmap:
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if (butPtr->width > 0) {
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width = butPtr->width;
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}
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if (butPtr->height > 0) {
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height = butPtr->height;
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}
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if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn) {
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butPtr->indicatorSpace = height;
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if (butPtr->type == TYPE_CHECK_BUTTON) {
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butPtr->indicatorDiameter = (65*height)/100;
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} else {
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butPtr->indicatorDiameter = (75*height)/100;
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}
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}
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} else if (butPtr->bitmap != None) {
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Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
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goto imageOrBitmap;
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} else {
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Tk_FreeTextLayout(butPtr->textLayout);
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butPtr->textLayout = Tk_ComputeTextLayout(butPtr->tkfont,
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butPtr->text, -1, butPtr->wrapLength, butPtr->justify, 0,
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&butPtr->textWidth, &butPtr->textHeight);
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width = butPtr->textWidth;
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height = butPtr->textHeight;
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avgWidth = Tk_TextWidth(butPtr->tkfont, "0", 1);
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Tk_GetFontMetrics(butPtr->tkfont, &fm);
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if (butPtr->width > 0) {
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width = butPtr->width * avgWidth;
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}
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if (butPtr->height > 0) {
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height = butPtr->height * fm.linespace;
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}
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if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn) {
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butPtr->indicatorDiameter = fm.linespace;
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if (butPtr->type == TYPE_CHECK_BUTTON) {
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butPtr->indicatorDiameter = (80*butPtr->indicatorDiameter)/100;
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}
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butPtr->indicatorSpace = butPtr->indicatorDiameter + avgWidth;
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}
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}
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/*
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* When issuing the geometry request, add extra space for the indicator,
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* if any, and for the border and padding, plus two extra pixels so the
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* display can be offset by 1 pixel in either direction for the raised
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* or lowered effect.
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*/
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if ((butPtr->image == NULL) && (butPtr->bitmap == None)) {
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width += 2*butPtr->padX;
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height += 2*butPtr->padY;
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}
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if ((butPtr->type == TYPE_BUTTON) && !Tk_StrictMotif(butPtr->tkwin)) {
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width += 2;
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height += 2;
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}
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Tk_GeometryRequest(butPtr->tkwin, (int) (width + butPtr->indicatorSpace
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+ 2*butPtr->inset), (int) (height + 2*butPtr->inset));
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Tk_SetInternalBorder(butPtr->tkwin, butPtr->inset);
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}
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