Merge commit '1741f1b6324ead16eb1eeaa16e1f18cf0a2abb4f' as 'tk8.6'

1 files changed, 483 insertions, 0 deletions

diff --git a/tk8.6/unix/tkUnixScrlbr.c b/tk8.6/unix/tkUnixScrlbr.c
new file mode 100644
index 0000000..0507211
--- /dev/null
+++ b/tk8.6/unix/tkUnixScrlbr.c
@@ -0,0 +1,483 @@
+/*
+ * tkUnixScrollbar.c --
+ *
+ *	This file implements the Unix specific portion of the scrollbar
+ *	widget.
+ *
+ * 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.
+ */
+
+#include "tkInt.h"
+#include "tkScrollbar.h"
+
+/*
+ * Minimum slider length, in pixels (designed to make sure that the slider is
+ * always easy to grab with the mouse).
+ */
+
+#define MIN_SLIDER_LENGTH	5
+
+/*
+ * Declaration of Unix specific scrollbar structure.
+ */
+
+typedef struct UnixScrollbar {
+    TkScrollbar info;		/* Generic scrollbar info. */
+    GC troughGC;		/* For drawing trough. */
+    GC copyGC;			/* Used for copying from pixmap onto screen. */
+} UnixScrollbar;
+
+/*
+ * The class procedure table for the scrollbar widget. All fields except size
+ * are left initialized to NULL, which should happen automatically since the
+ * variable is declared at this scope.
+ */
+
+const Tk_ClassProcs tkpScrollbarProcs = {
+    sizeof(Tk_ClassProcs),	/* size */
+    NULL,					/* worldChangedProc */
+    NULL,					/* createProc */
+    NULL					/* modalProc */
+};
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpCreateScrollbar --
+ *
+ *	Allocate a new TkScrollbar structure.
+ *
+ * Results:
+ *	Returns a newly allocated TkScrollbar structure.
+ *
+ * Side effects:
+ *	Registers an event handler for the widget.
+ *
+ *----------------------------------------------------------------------
+ */
+
+TkScrollbar *
+TkpCreateScrollbar(
+    Tk_Window tkwin)
+{
+    UnixScrollbar *scrollPtr = ckalloc(sizeof(UnixScrollbar));
+
+    scrollPtr->troughGC = None;
+    scrollPtr->copyGC = None;
+
+    Tk_CreateEventHandler(tkwin,
+	    ExposureMask|StructureNotifyMask|FocusChangeMask,
+	    TkScrollbarEventProc, scrollPtr);
+
+    return (TkScrollbar *) scrollPtr;
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * TkpDisplayScrollbar --
+ *
+ *	This procedure redraws the contents of a scrollbar window. It is
+ *	invoked as a do-when-idle handler, so it only runs when there's
+ *	nothing else for the application to do.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Information appears on the screen.
+ *
+ *--------------------------------------------------------------
+ */
+
+void
+TkpDisplayScrollbar(
+    ClientData clientData)	/* Information about window. */
+{
+    register TkScrollbar *scrollPtr = (TkScrollbar *) clientData;
+    register Tk_Window tkwin = scrollPtr->tkwin;
+    XPoint points[7];
+    Tk_3DBorder border;
+    int relief, width, elementBorderWidth;
+    Pixmap pixmap;
+
+    if ((scrollPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
+	goto done;
+    }
+
+    if (scrollPtr->vertical) {
+	width = Tk_Width(tkwin) - 2*scrollPtr->inset;
+    } else {
+	width = Tk_Height(tkwin) - 2*scrollPtr->inset;
+    }
+    elementBorderWidth = scrollPtr->elementBorderWidth;
+    if (elementBorderWidth < 0) {
+	elementBorderWidth = scrollPtr->borderWidth;
+    }
+
+    /*
+     * In order to avoid screen flashes, this procedure redraws the scrollbar
+     * 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(scrollPtr->display, Tk_WindowId(tkwin),
+	    Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin));
+
+    if (scrollPtr->highlightWidth != 0) {
+	GC gc;
+
+	if (scrollPtr->flags & GOT_FOCUS) {
+	    gc = Tk_GCForColor(scrollPtr->highlightColorPtr, pixmap);
+	} else {
+	    gc = Tk_GCForColor(scrollPtr->highlightBgColorPtr, pixmap);
+	}
+	Tk_DrawFocusHighlight(tkwin, gc, scrollPtr->highlightWidth, pixmap);
+    }
+    Tk_Draw3DRectangle(tkwin, pixmap, scrollPtr->bgBorder,
+	    scrollPtr->highlightWidth, scrollPtr->highlightWidth,
+	    Tk_Width(tkwin) - 2*scrollPtr->highlightWidth,
+	    Tk_Height(tkwin) - 2*scrollPtr->highlightWidth,
+	    scrollPtr->borderWidth, scrollPtr->relief);
+    XFillRectangle(scrollPtr->display, pixmap,
+	    ((UnixScrollbar*)scrollPtr)->troughGC,
+	    scrollPtr->inset, scrollPtr->inset,
+	    (unsigned) (Tk_Width(tkwin) - 2*scrollPtr->inset),
+	    (unsigned) (Tk_Height(tkwin) - 2*scrollPtr->inset));
+
+    /*
+     * Draw the top or left arrow. The coordinates of the polygon points
+     * probably seem odd, but they were carefully chosen with respect to X's
+     * rules for filling polygons. These point choices cause the arrows to
+     * just fill the narrow dimension of the scrollbar and be properly
+     * centered.
+     */
+
+    if (scrollPtr->activeField == TOP_ARROW) {
+	border = scrollPtr->activeBorder;
+	relief = scrollPtr->activeField == TOP_ARROW ? scrollPtr->activeRelief
+		: TK_RELIEF_RAISED;
+    } else {
+	border = scrollPtr->bgBorder;
+	relief = TK_RELIEF_RAISED;
+    }
+    if (scrollPtr->vertical) {
+	points[0].x = scrollPtr->inset - 1;
+	points[0].y = scrollPtr->arrowLength + scrollPtr->inset - 1;
+	points[1].x = width + scrollPtr->inset;
+	points[1].y = points[0].y;
+	points[2].x = width/2 + scrollPtr->inset;
+	points[2].y = scrollPtr->inset - 1;
+	Tk_Fill3DPolygon(tkwin, pixmap, border, points, 3,
+		elementBorderWidth, relief);
+    } else {
+	points[0].x = scrollPtr->arrowLength + scrollPtr->inset - 1;
+	points[0].y = scrollPtr->inset - 1;
+	points[1].x = scrollPtr->inset;
+	points[1].y = width/2 + scrollPtr->inset;
+	points[2].x = points[0].x;
+	points[2].y = width + scrollPtr->inset;
+	Tk_Fill3DPolygon(tkwin, pixmap, border, points, 3,
+		elementBorderWidth, relief);
+    }
+
+    /*
+     * Display the bottom or right arrow.
+     */
+
+    if (scrollPtr->activeField == BOTTOM_ARROW) {
+	border = scrollPtr->activeBorder;
+	relief = scrollPtr->activeField == BOTTOM_ARROW
+		? scrollPtr->activeRelief : TK_RELIEF_RAISED;
+    } else {
+	border = scrollPtr->bgBorder;
+	relief = TK_RELIEF_RAISED;
+    }
+    if (scrollPtr->vertical) {
+	points[0].x = scrollPtr->inset;
+	points[0].y = Tk_Height(tkwin) - scrollPtr->arrowLength
+		- scrollPtr->inset + 1;
+	points[1].x = width/2 + scrollPtr->inset;
+	points[1].y = Tk_Height(tkwin) - scrollPtr->inset;
+	points[2].x = width + scrollPtr->inset;
+	points[2].y = points[0].y;
+	Tk_Fill3DPolygon(tkwin, pixmap, border,
+		points, 3, elementBorderWidth, relief);
+    } else {
+	points[0].x = Tk_Width(tkwin) - scrollPtr->arrowLength
+		- scrollPtr->inset + 1;
+	points[0].y = scrollPtr->inset - 1;
+	points[1].x = points[0].x;
+	points[1].y = width + scrollPtr->inset;
+	points[2].x = Tk_Width(tkwin) - scrollPtr->inset;
+	points[2].y = width/2 + scrollPtr->inset;
+	Tk_Fill3DPolygon(tkwin, pixmap, border,
+		points, 3, elementBorderWidth, relief);
+    }
+
+    /*
+     * Display the slider.
+     */
+
+    if (scrollPtr->activeField == SLIDER) {
+	border = scrollPtr->activeBorder;
+	relief = scrollPtr->activeField == SLIDER ? scrollPtr->activeRelief
+		: TK_RELIEF_RAISED;
+    } else {
+	border = scrollPtr->bgBorder;
+	relief = TK_RELIEF_RAISED;
+    }
+    if (scrollPtr->vertical) {
+	Tk_Fill3DRectangle(tkwin, pixmap, border,
+		scrollPtr->inset, scrollPtr->sliderFirst,
+		width, scrollPtr->sliderLast - scrollPtr->sliderFirst,
+		elementBorderWidth, relief);
+    } else {
+	Tk_Fill3DRectangle(tkwin, pixmap, border,
+		scrollPtr->sliderFirst, scrollPtr->inset,
+		scrollPtr->sliderLast - scrollPtr->sliderFirst, width,
+		elementBorderWidth, relief);
+    }
+
+    /*
+     * Copy the information from the off-screen pixmap onto the screen, then
+     * delete the pixmap.
+     */
+
+    XCopyArea(scrollPtr->display, pixmap, Tk_WindowId(tkwin),
+	    ((UnixScrollbar*)scrollPtr)->copyGC, 0, 0,
+	    (unsigned) Tk_Width(tkwin), (unsigned) Tk_Height(tkwin), 0, 0);
+    Tk_FreePixmap(scrollPtr->display, pixmap);
+
+  done:
+    scrollPtr->flags &= ~REDRAW_PENDING;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpComputeScrollbarGeometry --
+ *
+ *	After changes in a scrollbar's size or configuration, this procedure
+ *	recomputes various geometry information used in displaying the
+ *	scrollbar.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	The scrollbar will be displayed differently.
+ *
+ *----------------------------------------------------------------------
+ */
+
+extern void
+TkpComputeScrollbarGeometry(
+    register TkScrollbar *scrollPtr)
+				/* Scrollbar whose geometry may have
+				 * changed. */
+{
+    int width, fieldLength;
+
+    if (scrollPtr->highlightWidth < 0) {
+	scrollPtr->highlightWidth = 0;
+    }
+    scrollPtr->inset = scrollPtr->highlightWidth + scrollPtr->borderWidth;
+    width = (scrollPtr->vertical) ? Tk_Width(scrollPtr->tkwin)
+	    : Tk_Height(scrollPtr->tkwin);
+    scrollPtr->arrowLength = width - 2*scrollPtr->inset + 1;
+    fieldLength = (scrollPtr->vertical ? Tk_Height(scrollPtr->tkwin)
+	    : Tk_Width(scrollPtr->tkwin))
+	    - 2*(scrollPtr->arrowLength + scrollPtr->inset);
+    if (fieldLength < 0) {
+	fieldLength = 0;
+    }
+    scrollPtr->sliderFirst = fieldLength*scrollPtr->firstFraction;
+    scrollPtr->sliderLast = fieldLength*scrollPtr->lastFraction;
+
+    /*
+     * Adjust the slider so that some piece of it is always displayed in the
+     * scrollbar and so that it has at least a minimal width (so it can be
+     * grabbed with the mouse).
+     */
+
+    if (scrollPtr->sliderFirst > fieldLength - MIN_SLIDER_LENGTH) {
+	scrollPtr->sliderFirst = fieldLength - MIN_SLIDER_LENGTH;
+    }
+    if (scrollPtr->sliderFirst < 0) {
+	scrollPtr->sliderFirst = 0;
+    }
+    if (scrollPtr->sliderLast < scrollPtr->sliderFirst + MIN_SLIDER_LENGTH) {
+	scrollPtr->sliderLast = scrollPtr->sliderFirst + MIN_SLIDER_LENGTH;
+    }
+    if (scrollPtr->sliderLast > fieldLength) {
+	scrollPtr->sliderLast = fieldLength;
+    }
+    scrollPtr->sliderFirst += scrollPtr->arrowLength + scrollPtr->inset;
+    scrollPtr->sliderLast += scrollPtr->arrowLength + scrollPtr->inset;
+
+    /*
+     * Register the desired geometry for the window (leave enough space for
+     * the two arrows plus a minimum-size slider, plus border around the whole
+     * window, if any). Then arrange for the window to be redisplayed.
+     */
+
+    if (scrollPtr->vertical) {
+	Tk_GeometryRequest(scrollPtr->tkwin,
+		scrollPtr->width + 2*scrollPtr->inset,
+		2*(scrollPtr->arrowLength + scrollPtr->borderWidth
+		+ scrollPtr->inset));
+    } else {
+	Tk_GeometryRequest(scrollPtr->tkwin,
+		2*(scrollPtr->arrowLength + scrollPtr->borderWidth
+		+ scrollPtr->inset), scrollPtr->width + 2*scrollPtr->inset);
+    }
+    Tk_SetInternalBorder(scrollPtr->tkwin, scrollPtr->inset);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpDestroyScrollbar --
+ *
+ *	Free data structures associated with the scrollbar control.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Frees the GCs associated with the scrollbar.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpDestroyScrollbar(
+    TkScrollbar *scrollPtr)
+{
+    UnixScrollbar *unixScrollPtr = (UnixScrollbar *)scrollPtr;
+
+    if (unixScrollPtr->troughGC != None) {
+	Tk_FreeGC(scrollPtr->display, unixScrollPtr->troughGC);
+    }
+    if (unixScrollPtr->copyGC != None) {
+	Tk_FreeGC(scrollPtr->display, unixScrollPtr->copyGC);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpConfigureScrollbar --
+ *
+ *	This procedure is called after the generic code has finished
+ *	processing configuration options, in order to configure platform
+ *	specific options.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Configuration info may get changed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpConfigureScrollbar(
+    register TkScrollbar *scrollPtr)
+				/* Information about widget; may or may not
+				 * already have values for some fields. */
+{
+    XGCValues gcValues;
+    GC new;
+    UnixScrollbar *unixScrollPtr = (UnixScrollbar *) scrollPtr;
+
+    Tk_SetBackgroundFromBorder(scrollPtr->tkwin, scrollPtr->bgBorder);
+
+    gcValues.foreground = scrollPtr->troughColorPtr->pixel;
+    new = Tk_GetGC(scrollPtr->tkwin, GCForeground, &gcValues);
+    if (unixScrollPtr->troughGC != None) {
+	Tk_FreeGC(scrollPtr->display, unixScrollPtr->troughGC);
+    }
+    unixScrollPtr->troughGC = new;
+    if (unixScrollPtr->copyGC == None) {
+	gcValues.graphics_exposures = False;
+	unixScrollPtr->copyGC = Tk_GetGC(scrollPtr->tkwin,
+		GCGraphicsExposures, &gcValues);
+    }
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * TkpScrollbarPosition --
+ *
+ *	Determine the scrollbar element corresponding to a given position.
+ *
+ * Results:
+ *	One of TOP_ARROW, TOP_GAP, etc., indicating which element of the
+ *	scrollbar covers the position given by (x, y). If (x,y) is outside the
+ *	scrollbar entirely, then OUTSIDE is returned.
+ *
+ * Side effects:
+ *	None.
+ *
+ *--------------------------------------------------------------
+ */
+
+int
+TkpScrollbarPosition(
+    register TkScrollbar *scrollPtr,
+				/* Scrollbar widget record. */
+    int x, int y)		/* Coordinates within scrollPtr's window. */
+{
+    int length, width, tmp;
+    register const int inset = scrollPtr->inset;
+
+    if (scrollPtr->vertical) {
+	length = Tk_Height(scrollPtr->tkwin);
+	width = Tk_Width(scrollPtr->tkwin);
+    } else {
+	tmp = x;
+	x = y;
+	y = tmp;
+	length = Tk_Width(scrollPtr->tkwin);
+	width = Tk_Height(scrollPtr->tkwin);
+    }
+
+    if (x<inset || x>=width-inset || y<inset || y>=length-inset) {
+	return OUTSIDE;
+    }
+
+    /*
+     * All of the calculations in this procedure mirror those in
+     * TkpDisplayScrollbar. Be sure to keep the two consistent.
+     */
+
+    if (y < inset + scrollPtr->arrowLength) {
+	return TOP_ARROW;
+    }
+    if (y < scrollPtr->sliderFirst) {
+	return TOP_GAP;
+    }
+    if (y < scrollPtr->sliderLast) {
+	return SLIDER;
+    }
+    if (y >= length - (scrollPtr->arrowLength + inset)) {
+	return BOTTOM_ARROW;
+    }
+    return BOTTOM_GAP;
+}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */