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+/*
+ * tkMacOSXScrollbar.c --
+ *
+ * This file implements the Macintosh specific portion of the scrollbar
+ * widget. The Macintosh scrollbar may also draw a windows grow
+ * region under certain cases.
+ *
+ * Copyright (c) 1996 by Sun Microsystems, Inc.
+ * Copyright 2001, Apple Computer, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * RCS: @(#) $Id: tkMacOSXScrlbr.c,v 1.2 2002/08/31 06:12:30 das Exp $
+ */
+
+#include "tkScrollbar.h"
+#include "tkMacOSXInt.h"
+
+#include <Carbon/Carbon.h>
+
+#include "tkMacOSXDebug.h"
+/*
+ * The following definitions should really be in MacOS
+ * header files. They are included here as this is the only
+ * file that needs the declarations.
+ */
+typedef pascal void (*ThumbActionFunc)(void);
+
+typedef ThumbActionFunc ThumbActionUPP;
+
+enum {
+ uppThumbActionProcInfo = kPascalStackBased
+};
+
+#define NewThumbActionProc(userRoutine) ((ThumbActionUPP) (userRoutine))
+
+/*
+ * 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
+#define MIN_SCROLLBAR_VALUE 0
+#define MAX_SCROLLBAR_VALUE 1000
+#define MAX_SCROLLBAR_DVALUE 1000.0
+
+/*
+ * Declaration of Windows specific scrollbar structure.
+ */
+
+typedef struct MacScrollbar {
+ TkScrollbar info; /* Generic scrollbar info */
+ ControlRef sbHandle; /* Opaque handle to the Scrollbar contol struct */
+ int macFlags; /* Various flags; see below */
+} MacScrollbar;
+
+/* Handle to the Scrollbar control structure */
+
+
+/*
+ * Flag bits for scrollbars on the Mac:
+ *
+ * ALREADY_DEAD: Non-zero means this scrollbar has been
+ * destroyed, but has not been cleaned up.
+ * IN_MODAL_LOOP: Non-zero means this scrollbar is in the middle
+ * of a modal loop.
+ * ACTIVE: Non-zero means this window is currently
+ * active (in the foreground).
+ * FLUSH_TOP: Flush with top of Mac window.
+ * FLUSH_BOTTOM: Flush with bottom of Mac window.
+ * FLUSH_RIGHT: Flush with right of Mac window.
+ * FLUSH_LEFT: Flush with left of Mac window.
+ * SCROLLBAR_GROW: Non-zero means this window draws the grow
+ * region for the toplevel window.
+ * AUTO_ADJUST: Non-zero means we automatically adjust
+ * the size of the widget to align correctly
+ * along a Mac window.
+ * DRAW_GROW: Non-zero means we draw the grow region.
+ */
+
+#define ALREADY_DEAD 1
+#define IN_MODAL_LOOP 2
+#define ACTIVE 4
+#define FLUSH_TOP 8
+#define FLUSH_BOTTOM 16
+#define FLUSH_RIGHT 32
+#define FLUSH_LEFT 64
+#define SCROLLBAR_GROW 128
+#define AUTO_ADJUST 256
+#define DRAW_GROW 512
+
+/*
+ * Globals uses locally in this file.
+ */
+static ControlActionUPP scrollActionProc = NULL; /* Pointer to func. */
+static ThumbActionUPP thumbActionProc = NULL; /* Pointer to func. */
+static TkScrollbar *activeScrollPtr = NULL; /* Non-null when in thumb */
+ /* proc. */
+/*
+ * Forward declarations for procedures defined later in this file:
+ */
+
+static pascal void ScrollbarActionProc _ANSI_ARGS_((ControlRef theControl, ControlPartCode partCode));
+static int ScrollbarBindProc _ANSI_ARGS_((ClientData clientData,
+ Tcl_Interp *interp, XEvent *eventPtr,
+ Tk_Window tkwin, KeySym keySym));
+static void ScrollbarEventProc _ANSI_ARGS_(( ClientData clientData, XEvent *eventPtr));
+static pascal void ThumbActionProc _ANSI_ARGS_((void));
+static void UpdateControlValues _ANSI_ARGS_((MacScrollbar *macScrollPtr));
+
+/*
+ * The class procedure table for the scrollbar widget. Leave the proc fields
+ * initialized to NULL, which should happen automatically because of the scope
+ * at which the variable is declared.
+ */
+
+Tk_ClassProcs tkpScrollbarProcs = {
+ sizeof(Tk_ClassProcs) /* size */
+};
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpCreateScrollbar --
+ *
+ * Allocate a new TkScrollbar structure.
+ *
+ * Results:
+ * Returns a newly allocated TkScrollbar structure.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+TkScrollbar *
+TkpCreateScrollbar(
+ Tk_Window tkwin) /* New Tk Window. */
+{
+ MacScrollbar * macScrollPtr;
+ TkWindow *winPtr = (TkWindow *)tkwin;
+
+ if (scrollActionProc == NULL) {
+ scrollActionProc = NewControlActionUPP (ScrollbarActionProc);
+ thumbActionProc = NewThumbActionProc(ThumbActionProc);
+ }
+
+ macScrollPtr = (MacScrollbar *) ckalloc(sizeof(MacScrollbar));
+ macScrollPtr->sbHandle = NULL;
+ macScrollPtr->macFlags = 0;
+
+ Tk_CreateEventHandler(tkwin, ActivateMask|ExposureMask|
+ StructureNotifyMask|FocusChangeMask,
+ ScrollbarEventProc, (ClientData) macScrollPtr);
+
+ if (!Tcl_GetAssocData(winPtr->mainPtr->interp, "TkScrollbar", NULL)) {
+ Tcl_SetAssocData(winPtr->mainPtr->interp, "TkScrollbar", NULL, (ClientData)1);
+ TkCreateBindingProcedure(winPtr->mainPtr->interp,
+ winPtr->mainPtr->bindingTable,
+ (ClientData)Tk_GetUid("Scrollbar"), "<ButtonPress>",
+ ScrollbarBindProc, NULL, NULL);
+ }
+ return (TkScrollbar *) macScrollPtr;
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * 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. */
+{
+ TkScrollbar *scrollPtr = (TkScrollbar *) clientData;
+ MacScrollbar *macScrollPtr = (MacScrollbar *) clientData;
+ Tk_Window tkwin = scrollPtr->tkwin;
+
+ MacDrawable *macDraw;
+ CGrafPtr saveWorld;
+ GDHandle saveDevice;
+ GWorldPtr destPort;
+ WindowRef windowRef;
+
+ if ((scrollPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
+ goto done;
+ }
+
+ /*
+ * Draw the focus or any 3D relief we may have.
+ */
+ if (scrollPtr->highlightWidth != 0) {
+ GC fgGC, bgGC;
+
+ bgGC = Tk_GCForColor(scrollPtr->highlightBgColorPtr,
+ Tk_WindowId(tkwin));
+
+ if (scrollPtr->flags & GOT_FOCUS) {
+ fgGC = Tk_GCForColor(scrollPtr->highlightColorPtr,
+ Tk_WindowId(tkwin));
+ TkpDrawHighlightBorder(tkwin, fgGC, bgGC, scrollPtr->highlightWidth,
+ Tk_WindowId(tkwin));
+ } else {
+ TkpDrawHighlightBorder(tkwin, bgGC, bgGC, scrollPtr->highlightWidth,
+ Tk_WindowId(tkwin));
+ }
+ }
+ Tk_Draw3DRectangle(tkwin, Tk_WindowId(tkwin), scrollPtr->bgBorder,
+ scrollPtr->highlightWidth, scrollPtr->highlightWidth,
+ Tk_Width(tkwin) - 2*scrollPtr->highlightWidth,
+ Tk_Height(tkwin) - 2*scrollPtr->highlightWidth,
+ scrollPtr->borderWidth, scrollPtr->relief);
+
+ /*
+ * Set up port for drawing Macintosh control.
+ */
+ macDraw = (MacDrawable *) Tk_WindowId(tkwin);
+ destPort = TkMacOSXGetDrawablePort(Tk_WindowId(tkwin));
+ GetGWorld(&saveWorld, &saveDevice);
+ SetGWorld(destPort, NULL);
+ TkMacOSXSetUpClippingRgn(Tk_WindowId(tkwin));
+
+ if (macScrollPtr->sbHandle == NULL) {
+ Rect r;
+ SInt16 initialValue;
+ SInt16 minValue;
+ SInt16 maxValue;
+ SInt16 procID;
+ WindowRef frontNonFloating;
+
+ r.left = r.top = 0;
+ r.right = r.bottom = 1;
+
+ minValue = MIN_SCROLLBAR_VALUE;
+ maxValue = MAX_SCROLLBAR_VALUE;
+ initialValue = (minValue + maxValue)/2;
+ procID = kControlScrollBarLiveProc;
+
+ windowRef = GetWindowFromPort(destPort);
+ macScrollPtr->sbHandle = NewControl(windowRef, &r, "\p",
+ false, initialValue,minValue,maxValue,
+ procID, (SInt32) scrollPtr);
+
+ /*
+ * If we are foremost then make us active.
+ */
+
+ frontNonFloating = FrontNonFloatingWindow();
+
+ if ((windowRef == FrontWindow()) || TkpIsWindowFloating(windowRef)) {
+ macScrollPtr->macFlags |= ACTIVE;
+ }
+ }
+
+ /*
+ * Update the control values before we draw.
+ */
+ windowRef = GetControlOwner (macScrollPtr->sbHandle);
+ UpdateControlValues(macScrollPtr);
+
+ if (macScrollPtr->macFlags & ACTIVE) {
+ Draw1Control(macScrollPtr->sbHandle);
+ if (macScrollPtr->macFlags & DRAW_GROW) {
+ DrawGrowIcon(windowRef);
+ }
+ } else {
+ HiliteControl (macScrollPtr->sbHandle, 255 );
+ Draw1Control(macScrollPtr->sbHandle);
+ if (macScrollPtr->macFlags & DRAW_GROW) {
+ DrawGrowIcon(windowRef);
+ Tk_Fill3DRectangle(tkwin, Tk_WindowId(tkwin), scrollPtr->bgBorder,
+ Tk_Width(tkwin) - 13, Tk_Height(tkwin) - 13,
+ Tk_Width(tkwin), Tk_Height(tkwin),
+ 0, TK_RELIEF_FLAT);
+ }
+ }
+
+ SetGWorld(saveWorld, saveDevice);
+
+ done:
+ scrollPtr->flags &= ~REDRAW_PENDING;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpConfigureScrollbar(scrollPtr)
+ register TkScrollbar *scrollPtr; /* Information about widget; may or
+ * may not already have values for
+ * some fields. */
+{
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpComputeScrollbarGeometry(
+ register TkScrollbar *scrollPtr) /* Scrollbar whose geometry may
+ * have changed. */
+{
+ MacScrollbar *macScrollPtr = (MacScrollbar *) scrollPtr;
+ int width, fieldLength, adjust = 0;
+
+ 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 - 2*scrollPtr->borderWidth)) {
+ scrollPtr->sliderFirst = fieldLength - 2*scrollPtr->borderWidth;
+ }
+ 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) {
+ if ((macScrollPtr->macFlags & AUTO_ADJUST) &&
+ (macScrollPtr->macFlags & (FLUSH_RIGHT|FLUSH_LEFT))) {
+ adjust--;
+ }
+ Tk_GeometryRequest(scrollPtr->tkwin,
+ scrollPtr->width + 2*scrollPtr->inset + adjust,
+ 2*(scrollPtr->arrowLength + scrollPtr->borderWidth
+ + scrollPtr->inset));
+ } else {
+ if ((macScrollPtr->macFlags & AUTO_ADJUST) &&
+ (macScrollPtr->macFlags & (FLUSH_TOP|FLUSH_BOTTOM))) {
+ adjust--;
+ }
+ Tk_GeometryRequest(scrollPtr->tkwin,
+ 2*(scrollPtr->arrowLength + scrollPtr->borderWidth
+ + scrollPtr->inset), scrollPtr->width + 2*scrollPtr->inset + adjust);
+ }
+ Tk_SetInternalBorder(scrollPtr->tkwin, scrollPtr->inset);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpDestroyScrollbar --
+ *
+ * Free data structures associated with the scrollbar control.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpDestroyScrollbar(
+ TkScrollbar *scrollPtr) /* Scrollbar to destroy. */
+{
+ MacScrollbar *macScrollPtr = (MacScrollbar *)scrollPtr;
+
+ if (macScrollPtr->sbHandle != NULL) {
+ if (!(macScrollPtr->macFlags & IN_MODAL_LOOP)) {
+ DisposeControl(macScrollPtr->sbHandle);
+ macScrollPtr->sbHandle = NULL;
+ }
+ }
+ macScrollPtr->macFlags |= ALREADY_DEAD;
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * 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(
+ TkScrollbar *scrollPtr, /* Scrollbar widget record. */
+ int x, int y) /* Coordinates within scrollPtr's
+ * window. */
+{
+ MacScrollbar *macScrollPtr = (MacScrollbar *) scrollPtr;
+ GWorldPtr destPort;
+ int length, width, tmp, inactive = false;
+ ControlPartCode part;
+ Point where;
+ Rect bounds;
+ int x0, y0;
+
+ x0 = x;
+ y0 = y;
+
+ 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 < scrollPtr->inset) || (x >= (width - scrollPtr->inset))
+ || (y < scrollPtr->inset) || (y >= (length - scrollPtr->inset))) {
+ return OUTSIDE;
+ }
+
+ /*
+ * All of the calculations in this procedure mirror those in
+ * DisplayScrollbar. Be sure to keep the two consistent. On the
+ * Macintosh we use the OS call TestControl to do this mapping.
+ * For TestControl to work, the scrollbar must be active and must
+ * be in the current port.
+ */
+
+ destPort = TkMacOSXGetDrawablePort(Tk_WindowId(scrollPtr->tkwin));
+ SetGWorld(destPort, NULL);
+ UpdateControlValues(macScrollPtr);
+ if ( GetControlHilite(macScrollPtr->sbHandle) == 255 ) {
+ inactive = true;
+ HiliteControl(macScrollPtr->sbHandle, 0 );
+ }
+
+ TkMacOSXWinBounds((TkWindow *) scrollPtr->tkwin, &bounds);
+ where.h = x0 + bounds.left;
+ where.v = y0 + bounds.top;
+ part = TestControl(((MacScrollbar *) scrollPtr)->sbHandle, where);
+ if (inactive) {
+ HiliteControl(macScrollPtr->sbHandle, 255 );
+ }
+ switch (part) {
+ case kControlUpButtonPart:
+ return TOP_ARROW;
+ case kControlPageUpPart:
+ return TOP_GAP;
+ case kControlIndicatorPart:
+ return SLIDER;
+ case kControlPageDownPart:
+ return BOTTOM_GAP;
+ case kControlDownButtonPart:
+ return BOTTOM_ARROW;
+ default:
+ return OUTSIDE;
+ }
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * ThumbActionProc --
+ *
+ * Callback procedure used by the Macintosh toolbox call
+ * TrackControl. This call is used to track the thumb of
+ * the scrollbar. Unlike the ScrollbarActionProc function
+ * this function is called once and basically takes over
+ * tracking the scrollbar from the control. This is done
+ * to avoid conflicts with what the control plans to draw.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * May change the display.
+ *
+ *--------------------------------------------------------------
+ */
+
+static pascal void
+ThumbActionProc()
+{
+ register TkScrollbar *scrollPtr = activeScrollPtr;
+ register MacScrollbar *macScrollPtr = (MacScrollbar *) activeScrollPtr;
+ Tcl_DString cmdString;
+ int origValue, trackBarPin;
+ double thumbWidth, newFirstFraction, trackBarSize;
+ char valueString[40];
+ Point currentPoint = { 0, 0 };
+ Rect trackRect;
+ Tcl_Interp *interp;
+ MouseTrackingResult trackingResult;
+ OSErr err;
+
+ if (scrollPtr == NULL) {
+ return;
+ }
+
+ Tcl_DStringInit(&cmdString);
+
+ /*
+ * First compute values that will remain constant during the tracking
+ * of the thumb. The variable trackBarSize is the length of the scrollbar
+ * minus the 2 arrows and half the width of the thumb on both sides
+ * (3 * arrowLength). The variable trackBarPin is the lower starting point
+ * of the drag region.
+ *
+ * Note: the arrowLength is equal to the thumb width of a Mac scrollbar.
+ */
+
+ origValue = GetControlValue(macScrollPtr->sbHandle);
+ GetControlBounds(macScrollPtr->sbHandle, &trackRect);
+ if (scrollPtr->vertical == true) {
+ trackBarSize = (double) (trackRect.bottom - trackRect.top
+ - (scrollPtr->arrowLength * 3));
+ trackBarPin = trackRect.top + scrollPtr->arrowLength
+ + (scrollPtr->arrowLength / 2);
+ InsetRect(&trackRect, -25, -113);
+
+ } else {
+ trackBarSize = (double) (trackRect.right - trackRect.left
+ - (scrollPtr->arrowLength * 3));
+ trackBarPin = trackRect.left + scrollPtr->arrowLength
+ + (scrollPtr->arrowLength / 2);
+ InsetRect(&trackRect, -113, -25);
+ }
+
+ /*
+ * Track the mouse while the button is held down. If the mouse is moved,
+ * we calculate the value that should be passed to the "command" part of
+ * the scrollbar.
+ */
+
+ do {
+ err = TrackMouseLocationWithOptions(NULL,
+ kTrackMouseLocationOptionDontConsumeMouseUp,
+ kEventDurationForever,
+ &currentPoint,
+ NULL,
+ &trackingResult);
+
+ if ((err==noErr)
+ && ((trackingResult == kMouseTrackingMouseDragged)
+ || (trackingResult == kMouseTrackingMouseMoved))) {
+ /*
+ * Calculating this value is a little tricky. We need to calculate a
+ * value for where the thumb would be in a Motif widget (variable
+ * thumb). This value is what the "command" expects and is what will
+ * be resent to the scrollbar to update its value.
+ */
+ thumbWidth = scrollPtr->lastFraction - scrollPtr->firstFraction;
+ if (PtInRect(currentPoint, &trackRect)) {
+ if (scrollPtr->vertical == true) {
+ newFirstFraction = (1.0 - thumbWidth) *
+ ((double) (currentPoint.v - trackBarPin) / trackBarSize);
+ } else {
+ newFirstFraction = (1.0 - thumbWidth) *
+ ((double) (currentPoint.h - trackBarPin) / trackBarSize);
+ }
+ } else {
+ newFirstFraction = ((double) origValue / MAX_SCROLLBAR_DVALUE)
+ * (1.0 - thumbWidth);
+ }
+ sprintf(valueString, "%g", newFirstFraction);
+ Tcl_DStringSetLength(&cmdString, 0);
+ Tcl_DStringAppend(&cmdString, scrollPtr->command,
+ scrollPtr->commandSize);
+ Tcl_DStringAppendElement(&cmdString, "moveto");
+ Tcl_DStringAppendElement(&cmdString, valueString);
+ interp = scrollPtr->interp;
+ Tcl_Preserve((ClientData) interp);
+ Tcl_GlobalEval(interp, cmdString.string);
+ Tcl_Release((ClientData) interp);
+ Tcl_DStringSetLength(&cmdString, 0);
+ Tcl_DStringAppend(&cmdString, "update idletasks",
+ strlen("update idletasks"));
+ Tcl_Preserve((ClientData) interp);
+ Tcl_GlobalEval(interp, cmdString.string);
+ Tcl_Release((ClientData) interp);
+ }
+ } while ((err==noErr) && trackingResult!=kMouseTrackingMouseReleased );
+
+ Tcl_DStringFree(&cmdString);
+ return;
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * ScrollbarActionProc --
+ *
+ * Callback procedure used by the Macintosh toolbox call
+ * TrackControl. This call will update the display while
+ * the scrollbar is being manipulated by the user.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * May change the display.
+ *
+ *--------------------------------------------------------------
+ */
+
+static pascal void
+ScrollbarActionProc(
+ ControlRef theControl, /* Handle to scrollbat control */
+ ControlPartCode partCode) /* Part of scrollbar that was "hit" */
+{
+ TkScrollbar *scrollPtr = (TkScrollbar *) GetControlReference(theControl);
+ Tcl_DString cmdString;
+
+ Tcl_DStringInit(&cmdString);
+ Tcl_DStringAppend(&cmdString, scrollPtr->command,
+ scrollPtr->commandSize);
+
+ if ( partCode == kControlUpButtonPart ||
+ partCode == kControlDownButtonPart ) {
+ Tcl_DStringAppendElement(&cmdString, "scroll");
+ Tcl_DStringAppendElement(&cmdString,
+ (partCode == kControlUpButtonPart ) ? "-1" : "1");
+ Tcl_DStringAppendElement(&cmdString, "unit");
+ } else if (partCode == kControlPageUpPart || partCode == kControlPageDownPart ) {
+ Tcl_DStringAppendElement(&cmdString, "scroll");
+ Tcl_DStringAppendElement(&cmdString,
+ (partCode == kControlPageUpPart ) ? "-1" : "1");
+ Tcl_DStringAppendElement(&cmdString, "page");
+ }
+ Tcl_Preserve((ClientData) scrollPtr->interp);
+ Tcl_DStringAppend(&cmdString, "; update idletasks",
+ strlen("; update idletasks"));
+ Tcl_GlobalEval(scrollPtr->interp, cmdString.string);
+ Tcl_Release((ClientData) scrollPtr->interp);
+
+ Tcl_DStringFree(&cmdString);
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * ScrollbarBindProc --
+ *
+ * This procedure is invoked when the default <ButtonPress>
+ * binding on the Scrollbar bind tag fires.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The event enters a modal loop.
+ *
+ *--------------------------------------------------------------
+ */
+
+static int
+ScrollbarBindProc(
+ ClientData clientData, /* Not used. */
+ Tcl_Interp *interp, /* Interp with binding. */
+ XEvent *eventPtr, /* X event that triggered binding. */
+ Tk_Window tkwin, /* Target window for event. */
+ KeySym keySym) /* The KeySym if a key event. */
+{
+ TkWindow *winPtr = (TkWindow*)tkwin;
+ TkScrollbar *scrollPtr = (TkScrollbar *) winPtr->instanceData;
+ MacScrollbar *macScrollPtr = (MacScrollbar *) winPtr->instanceData;
+
+ Tcl_Preserve((ClientData)scrollPtr);
+ macScrollPtr->macFlags |= IN_MODAL_LOOP;
+
+ if (eventPtr->type == ButtonPress) {
+ Point where;
+ Rect bounds;
+ int part, x, y, dummy;
+ unsigned int state;
+ CGrafPtr saveWorld;
+ GDHandle saveDevice;
+ GWorldPtr destPort;
+ Window window;
+
+ /*
+ * To call Macintosh control routines we must have the port
+ * set to the window containing the control. We will then test
+ * which part of the control was hit and act accordingly.
+ */
+ destPort = TkMacOSXGetDrawablePort(Tk_WindowId(scrollPtr->tkwin));
+ GetGWorld(&saveWorld, &saveDevice);
+ SetGWorld(destPort, NULL);
+ TkMacOSXSetUpClippingRgn(Tk_WindowId(scrollPtr->tkwin));
+
+ TkMacOSXWinBounds((TkWindow *) scrollPtr->tkwin, &bounds);
+ where.h = eventPtr->xbutton.x + bounds.left;
+ where.v = eventPtr->xbutton.y + bounds.top;
+ part = TestControl(macScrollPtr->sbHandle, where);
+ if (part == kControlIndicatorPart && scrollPtr->jump == false) {
+ /*
+ * Case 1: In thumb, no jump scrolling. Call track control
+ * with the thumb action proc which will do most of the work.
+ * Set the global activeScrollPtr to the current control
+ * so the callback may have access to it.
+ */
+ activeScrollPtr = scrollPtr;
+ part = TrackControl(macScrollPtr->sbHandle, where,
+ (ControlActionUPP) thumbActionProc);
+ activeScrollPtr = NULL;
+ } else if (part == kControlIndicatorPart) {
+ /*
+ * Case 2: in thumb with jump scrolling. Call TrackControl
+ * with a NULL action proc. Use the new value of the control
+ * to set update the control.
+ */
+ part = TrackControl(macScrollPtr->sbHandle, where, NULL);
+ if (part == kControlIndicatorPart) {
+ double newFirstFraction, thumbWidth;
+ Tcl_DString cmdString;
+ char valueString[TCL_DOUBLE_SPACE];
+
+ /*
+ * The following calculation takes the new control
+ * value and maps it to what Tk needs for its variable
+ * thumb size representation.
+ */
+ thumbWidth = scrollPtr->lastFraction
+ - scrollPtr->firstFraction;
+ newFirstFraction = (1.0 - thumbWidth) *
+ ((double) GetControlValue(macScrollPtr->sbHandle) / MAX_SCROLLBAR_DVALUE);
+ sprintf(valueString, "%g", newFirstFraction);
+
+ Tcl_DStringInit(&cmdString);
+ Tcl_DStringAppend(&cmdString, scrollPtr->command,
+ strlen(scrollPtr->command));
+ Tcl_DStringAppendElement(&cmdString, "moveto");
+ Tcl_DStringAppendElement(&cmdString, valueString);
+ Tcl_DStringAppend(&cmdString, "; update idletasks",
+ strlen("; update idletasks"));
+
+ interp = scrollPtr->interp;
+ Tcl_Preserve((ClientData) interp);
+ Tcl_GlobalEval(interp, cmdString.string);
+ Tcl_Release((ClientData) interp);
+ Tcl_DStringFree(&cmdString);
+ }
+ } else if (part != 0) {
+ /*
+ * Case 3: in any other part of the scrollbar. We call
+ * TrackControl with the scrollActionProc which will do
+ * most all the work.
+ */
+ TrackControl(macScrollPtr->sbHandle, where, scrollActionProc);
+ HiliteControl(macScrollPtr->sbHandle, 0);
+ }
+
+ /*
+ * The TrackControl call will "eat" the ButtonUp event. We now
+ * generate a ButtonUp event so Tk will unset implicit grabs etc.
+ */
+ GetMouse(&where);
+ XQueryPointer(NULL, None, &window, &window, &x,
+ &y, &dummy, &dummy, &state);
+ window = Tk_WindowId(scrollPtr->tkwin);
+ TkGenerateButtonEvent(x, y, window, state);
+
+ SetGWorld(saveWorld, saveDevice);
+ }
+
+ if (macScrollPtr->sbHandle && (macScrollPtr->macFlags & ALREADY_DEAD)) {
+ DisposeControl(macScrollPtr->sbHandle);
+ macScrollPtr->sbHandle = NULL;
+ }
+ macScrollPtr->macFlags &= ~IN_MODAL_LOOP;
+ Tcl_Release((ClientData)scrollPtr);
+
+ return TCL_OK;
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * ScrollbarEventProc --
+ *
+ * This procedure is invoked by the Tk dispatcher for various
+ * events on scrollbars.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * When the window gets deleted, internal structures get
+ * cleaned up. When it gets exposed, it is redisplayed.
+ *
+ *--------------------------------------------------------------
+ */
+
+static void
+ScrollbarEventProc(
+ ClientData clientData, /* Information about window. */
+ XEvent *eventPtr) /* Information about event. */
+{
+ TkScrollbar *scrollPtr = (TkScrollbar *) clientData;
+ MacScrollbar *macScrollPtr = (MacScrollbar *) clientData;
+
+ if (eventPtr->type == UnmapNotify) {
+ TkMacOSXSetScrollbarGrow((TkWindow *) scrollPtr->tkwin, false);
+ } else if (eventPtr->type == ActivateNotify) {
+ macScrollPtr->macFlags |= ACTIVE;
+ TkScrollbarEventuallyRedraw((ClientData) scrollPtr);
+ } else if (eventPtr->type == DeactivateNotify) {
+ macScrollPtr->macFlags &= ~ACTIVE;
+ TkScrollbarEventuallyRedraw((ClientData) scrollPtr);
+ } else {
+ TkScrollbarEventProc(clientData, eventPtr);
+ }
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * UpdateControlValues --
+ *
+ * This procedure updates the Macintosh scrollbar control
+ * to display the values defined by the Tk scrollbar.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The Macintosh control is updated.
+ *
+ *--------------------------------------------------------------
+ */
+
+static void
+UpdateControlValues(
+ MacScrollbar *macScrollPtr) /* Scrollbar data struct. */
+{
+ TkScrollbar *scrollPtr = (TkScrollbar *) macScrollPtr;
+ Tk_Window tkwin = scrollPtr->tkwin;
+ MacDrawable * macDraw = (MacDrawable *) Tk_WindowId(scrollPtr->tkwin);
+ WindowRef windowRef = GetControlOwner(macScrollPtr->sbHandle);
+ double middle;
+ SInt32 viewSize;
+ int flushRight = false;
+ int flushBottom = false;
+ Rect contrlRect, portRect;
+ UInt8 contrlHilite;
+
+ /*
+ * We can't use the Macintosh commands SizeControl and MoveControl as these
+ * calls will also cause a redraw which in our case will also cause
+ * flicker. To avoid this we adjust the control record directly. The
+ * Draw1Control command appears to just draw where ever the control says to
+ * draw so this seems right.
+ *
+ * NOTE: changing the control record directly may not work when
+ * Apple releases the Copland version of the MacOS (or when hell is cold).
+ */
+
+ contrlRect.left = macDraw->xOff + scrollPtr->inset;
+ contrlRect.top = macDraw->yOff + scrollPtr->inset;
+ contrlRect.right = macDraw->xOff + Tk_Width(tkwin) - scrollPtr->inset;
+ contrlRect.bottom = macDraw->yOff + Tk_Height(tkwin) - scrollPtr->inset;
+
+ SetControlBounds(macScrollPtr->sbHandle, &contrlRect );
+
+ /*
+ * To make Tk applications look more like Macintosh applications without
+ * requiring additional work by the Tk developer we do some cute tricks.
+ * The first trick plays with the size of the widget to get it to overlap
+ * with the side of the window by one pixel (we don't do this if the placer
+ * is the geometry manager). The second trick shrinks the scrollbar if it
+ * it covers the area of the grow region ao the scrollbar can also draw
+ * the grow region if need be.
+ */
+ if (!strcmp(macDraw->winPtr->geomMgrPtr->name, "place")) {
+ macScrollPtr->macFlags &= AUTO_ADJUST;
+ } else {
+ macScrollPtr->macFlags |= AUTO_ADJUST;
+ }
+ GetPortBounds ( GetWindowPort ( windowRef ), &portRect );
+ if ( portRect.left == contrlRect.left ) {
+ if (macScrollPtr->macFlags & AUTO_ADJUST) {
+ contrlRect.left--;
+ SetControlBounds ( macScrollPtr->sbHandle, &contrlRect );
+ }
+ if (!(macScrollPtr->macFlags & FLUSH_LEFT)) {
+ macScrollPtr->macFlags |= FLUSH_LEFT;
+ if (scrollPtr->vertical) {
+ TkpComputeScrollbarGeometry(scrollPtr);
+ }
+ }
+ } else if (macScrollPtr->macFlags & FLUSH_LEFT) {
+ macScrollPtr->macFlags &= ~FLUSH_LEFT;
+ if (scrollPtr->vertical) {
+ TkpComputeScrollbarGeometry(scrollPtr);
+ }
+ }
+
+ if (portRect.top == contrlRect.top) {
+ if (macScrollPtr->macFlags & AUTO_ADJUST) {
+ contrlRect.top--;
+ }
+ if (!(macScrollPtr->macFlags & FLUSH_TOP)) {
+ macScrollPtr->macFlags |= FLUSH_TOP;
+ if (! scrollPtr->vertical) {
+ TkpComputeScrollbarGeometry(scrollPtr);
+ }
+ }
+ } else if (macScrollPtr->macFlags & FLUSH_TOP) {
+ macScrollPtr->macFlags &= ~FLUSH_TOP;
+ if (! scrollPtr->vertical) {
+ TkpComputeScrollbarGeometry(scrollPtr);
+ }
+ }
+
+ if (portRect.right == contrlRect.right) {
+ flushRight = true;
+ if (macScrollPtr->macFlags & AUTO_ADJUST) {
+ contrlRect.right++;
+ }
+ if (!(macScrollPtr->macFlags & FLUSH_RIGHT)) {
+ macScrollPtr->macFlags |= FLUSH_RIGHT;
+ if (scrollPtr->vertical) {
+ TkpComputeScrollbarGeometry(scrollPtr);
+ }
+ }
+ } else if (macScrollPtr->macFlags & FLUSH_RIGHT) {
+ macScrollPtr->macFlags &= ~FLUSH_RIGHT;
+ if (scrollPtr->vertical) {
+ TkpComputeScrollbarGeometry(scrollPtr);
+ }
+ }
+
+ if (portRect.bottom == contrlRect.bottom) {
+ flushBottom = true;
+ if (macScrollPtr->macFlags & AUTO_ADJUST) {
+ contrlRect.bottom++;
+ }
+ if (!(macScrollPtr->macFlags & FLUSH_BOTTOM)) {
+ macScrollPtr->macFlags |= FLUSH_BOTTOM;
+ if (! scrollPtr->vertical) {
+ TkpComputeScrollbarGeometry(scrollPtr);
+ }
+ }
+ } else if (macScrollPtr->macFlags & FLUSH_BOTTOM) {
+ macScrollPtr->macFlags &= ~FLUSH_BOTTOM;
+ if (! scrollPtr->vertical) {
+ TkpComputeScrollbarGeometry(scrollPtr);
+ }
+ }
+
+ /*
+ * If the scrollbar is flush against the bottom right hand corner then
+ * it may need to draw the grow region for the window so we let the
+ * wm code know about this scrollbar. We don't actually draw the grow
+ * region, however, unless we are currently resizable.
+ */
+ macScrollPtr->macFlags &= ~DRAW_GROW;
+ if (flushBottom && flushRight) {
+ TkMacOSXSetScrollbarGrow((TkWindow *) tkwin, true);
+ if (TkMacOSXResizable(macDraw->toplevel->winPtr)) {
+ if (scrollPtr->vertical) {
+ contrlRect.bottom -= 14;
+ } else {
+ contrlRect.right -= 14;
+ }
+ macScrollPtr->macFlags |= DRAW_GROW;
+ }
+ } else {
+ TkMacOSXSetScrollbarGrow((TkWindow *) tkwin, false);
+ }
+
+ /*
+ * Given the Tk parameters for the fractions of the start and
+ * end of the thumb, the following calculation determines the
+ * location for the fixed sized Macintosh thumb.
+ */
+ middle = scrollPtr->firstFraction / (scrollPtr->firstFraction +
+ (1.0 - scrollPtr->lastFraction));
+ viewSize = (SInt32)((scrollPtr->lastFraction-scrollPtr->firstFraction)
+ * MAX_SCROLLBAR_DVALUE);
+ SetControlViewSize(macScrollPtr->sbHandle,viewSize);
+ SetControlValue(macScrollPtr->sbHandle,
+ (short) (middle * MAX_SCROLLBAR_VALUE) );
+ contrlHilite=GetControlHilite(macScrollPtr->sbHandle);
+ if ( contrlHilite == 0 || contrlHilite == 255) {
+ if (scrollPtr->firstFraction == 0.0 &&
+ scrollPtr->lastFraction == 1.0) {
+ HiliteControl(macScrollPtr->sbHandle,255);
+ } else {
+ HiliteControl(macScrollPtr->sbHandle,0);
+ }
+ }
+ if ( !IsControlVisible (macScrollPtr -> sbHandle) ) {
+ SetControlVisibility(macScrollPtr->sbHandle,TRUE,FALSE);
+ }
+}