Initial revision

FossilOrigin-Name: 2bf55ca9aa942b581137b9f474da5ad9c1480de4

1 files changed, 478 insertions, 0 deletions

diff --git a/unix/tkUnixButton.c b/unix/tkUnixButton.c
new file mode 100644
index 0000000..8c74dcb
--- /dev/null
+++ b/unix/tkUnixButton.c
@@ -0,0 +1,478 @@
+/* 
+ * tkUnixButton.c --
+ *
+ *	This file implements the Unix 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: @(#) tkUnixButton.c 1.4 97/06/06 11:21:40
+ */
+
+#include "tkButton.h"
+
+/*
+ * Declaration of Unix specific button structure.
+ */
+
+typedef struct UnixButton {
+    TkButton info;		/* Generic button info. */
+} UnixButton;
+
+/*
+ * The class procedure table for the button widgets.
+ */
+
+TkClassProcs tkpButtonProcs = { 
+    NULL,			/* createProc. */
+    TkButtonWorldChanged,	/* geometryProc. */
+    NULL			/* modalProc. */
+};
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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;
+{
+    UnixButton *butPtr = (UnixButton *)ckalloc(sizeof(UnixButton));
+    return (TkButton *) butPtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpDisplayButton --
+ *
+ *	This procedure 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 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;
+    register Tk_Window tkwin = butPtr->tkwin;
+    int width, height;
+    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;
+    }
+
+    offset = (butPtr->type == TYPE_BUTTON) && !Tk_StrictMotif(butPtr->tkwin);
+
+    /*
+     * 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;
+
+	x += offset;
+	y += offset;
+	if (relief == TK_RELIEF_RAISED) {
+	    x -= offset;
+	    y -= offset;
+	} else 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 {
+	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) {
+	int dim;
+
+	dim = butPtr->indicatorDiameter;
+	x -= butPtr->indicatorSpace;
+	y -= dim/2;
+	if (dim > 2*butPtr->borderWidth) {
+	    Tk_Draw3DRectangle(tkwin, pixmap, border, x, y, dim, dim,
+		    butPtr->borderWidth, 
+		    (butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN :
+		    TK_RELIEF_RAISED);
+	    x += butPtr->borderWidth;
+	    y += butPtr->borderWidth;
+	    dim -= 2*butPtr->borderWidth;
+	    if (butPtr->flags & SELECTED) {
+		GC gc;
+
+		gc = Tk_3DBorderGC(tkwin,(butPtr->selectBorder != NULL)
+			? butPtr->selectBorder : butPtr->normalBorder,
+			TK_3D_FLAT_GC);
+		XFillRectangle(butPtr->display, pixmap, gc, x, y,
+			(unsigned int) dim, (unsigned int) dim);
+	    } else {
+		Tk_Fill3DRectangle(tkwin, pixmap, butPtr->normalBorder, x, y,
+			dim, dim, butPtr->borderWidth, TK_RELIEF_FLAT);
+	    }
+	}
+    } else if ((butPtr->type == TYPE_RADIO_BUTTON) && butPtr->indicatorOn) {
+	XPoint points[4];
+	int radius;
+
+	radius = butPtr->indicatorDiameter/2;
+	points[0].x = x - butPtr->indicatorSpace;
+	points[0].y = y;
+	points[1].x = points[0].x + radius;
+	points[1].y = points[0].y + radius;
+	points[2].x = points[1].x + radius;
+	points[2].y = points[0].y;
+	points[3].x = points[1].x;
+	points[3].y = points[0].y - radius;
+	if (butPtr->flags & SELECTED) {
+	    GC gc;
+
+	    gc = Tk_3DBorderGC(tkwin, (butPtr->selectBorder != NULL)
+		    ? butPtr->selectBorder : butPtr->normalBorder,
+		    TK_3D_FLAT_GC);
+	    XFillPolygon(butPtr->display, pixmap, gc, points, 4, Convex,
+		    CoordModeOrigin);
+	} else {
+	    Tk_Fill3DPolygon(tkwin, pixmap, butPtr->normalBorder, points,
+		    4, butPtr->borderWidth, TK_RELIEF_FLAT);
+	}
+	Tk_Draw3DPolygon(tkwin, pixmap, border, points, 4, butPtr->borderWidth,
+		(butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN :
+		TK_RELIEF_RAISED);
+    }
+
+    /*
+     * 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.
+     * 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 == tkActiveUid) {
+	    /*
+	     * 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 == tkNormalUid) {
+	    /*
+	     * 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 == tkNormalUid) {
+	    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 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;
+
+    /*
+     * Leave room for the default ring if needed.
+     */
+
+    if (butPtr->defaultState != tkDisabledUid) {
+	butPtr->inset += 5;
+    }
+    butPtr->indicatorSpace = 0;
+    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 = height;
+	    if (butPtr->type == TYPE_CHECK_BUTTON) {
+		butPtr->indicatorDiameter = (65*height)/100;
+	    } else {
+		butPtr->indicatorDiameter = (75*height)/100;
+	    }
+	}
+    } 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 = 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);
+}