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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.
+ * Copyright (c) 2006-2007 Daniel A. Steffen <das@users.sourceforge.net>
+ *
+ * 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 1.1 2009/06/26 01:42:47 das Exp $
+ */
+
+#include "tkMacOSXPrivate.h"
+#include "tkScrollbar.h"
+#include "tkMacOSXDebug.h"
+
+#define MIN_SCROLLBAR_VALUE 0
+#define SCROLLBAR_SCALING_VALUE ((double)(LONG_MAX>>1))
+
+/*
+ * Declaration of Mac specific scrollbar structure.
+ */
+
+typedef struct MacScrollbar {
+ TkScrollbar info; /* Generic scrollbar info */
+ ControlRef sbHandle; /* Scrollbar control */
+ int macFlags; /* Various flags; see below */
+ Rect eraseRect; /* Rect to erase before drawing control */
+} MacScrollbar;
+
+/*
+ * 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).
+ */
+
+#define ALREADY_DEAD 1
+#define IN_MODAL_LOOP 2
+#define ACTIVE 4
+
+/*
+ * Globals uses locally in this file.
+ */
+static ControlActionUPP scrollActionProc = NULL; /* Pointer to func. */
+static ControlActionUPP thumbActionProc = NULL; /* Pointer to func. */
+static Point mouseDownPoint; /* Used to store the coordinates where the
+ * mouse was first pressed to begin dragging
+ * the thumb, because ThumbActionProc can't
+ * take any args. */
+
+typedef struct ScrollbarMetrics {
+ SInt32 width, minHeight, minThumbHeight;
+ short topArrowHeight, bottomArrowHeight;
+ ControlSize size;
+} ScrollbarMetrics;
+
+static ScrollbarMetrics metrics[2] = {
+ {15, 54, 26, 14, 14, kControlSizeNormal}, /* kThemeScrollBarMedium */
+ {11, 40, 20, 10, 10, kControlSizeSmall}, /* kThemeScrollBarSmall */
+};
+
+/*
+ * This variable holds the default width for a scrollbar in string form for
+ * use in a Tk_ConfigSpec.
+ */
+
+static char defWidth[TCL_INTEGER_SPACE];
+
+/*
+ * Forward declarations for procedures defined later in this file:
+ */
+
+static pascal void ScrollbarActionProc(ControlRef theControl,
+ ControlPartCode partCode);
+static pascal void ThumbActionProc(ControlRef theControl,
+ ControlPartCode partCode);
+static int ScrollbarBindProc(ClientData clientData,
+ Tcl_Interp *interp, XEvent *eventPtr,
+ Tk_Window tkwin, KeySym keySym);
+static void ScrollbarEventProc(ClientData clientData,
+ XEvent *eventPtr);
+static void UpdateControlValues(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 */
+};
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacOSXInitScrollbarMetrics --
+ *
+ * This function initializes the current system metrics for a scrollbar.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Updates the geometry cache info for all scrollbars.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkMacOSXInitScrollbarMetrics(void)
+{
+ const short height = 100, width = 50;
+ ThemeTrackDrawInfo info = {0, {0, 0, height, width}, 0, 1, 0, 0,
+ kThemeTrackShowThumb, kThemeTrackActive, 0, {{1, 0}}};
+ Rect bounds;
+ Tk_ConfigSpec *specPtr;
+
+ ChkErr(GetThemeMetric, kThemeMetricScrollBarWidth, &metrics[0].width);
+ ChkErr(GetThemeMetric, kThemeMetricScrollBarMinThumbHeight,
+ &metrics[0].minThumbHeight);
+ info.kind = kThemeScrollBarMedium;
+ ChkErr(GetThemeTrackDragRect, &info, &bounds);
+ metrics[0].topArrowHeight = bounds.top;
+ metrics[0].bottomArrowHeight = height - bounds.bottom;
+ metrics[0].minHeight = metrics[0].minThumbHeight +
+ metrics[0].topArrowHeight + metrics[0].bottomArrowHeight;
+ ChkErr(GetThemeMetric, kThemeMetricSmallScrollBarWidth, &metrics[1].width);
+ ChkErr(GetThemeMetric, kThemeMetricSmallScrollBarMinThumbHeight,
+ &metrics[1].minThumbHeight);
+ info.kind = kThemeScrollBarSmall;
+ ChkErr(GetThemeTrackDragRect, &info, &bounds);
+ metrics[1].topArrowHeight = bounds.top;
+ metrics[1].bottomArrowHeight = height - bounds.bottom;
+ metrics[1].minHeight = metrics[1].minThumbHeight +
+ metrics[1].topArrowHeight + metrics[1].bottomArrowHeight;
+
+ sprintf(defWidth, "%ld", metrics[0].width);
+ for (specPtr = tkpScrollbarConfigSpecs; specPtr->type != TK_CONFIG_END;
+ specPtr++) {
+ if (specPtr->offset == Tk_Offset(TkScrollbar, width)) {
+ specPtr->defValue = defWidth;
+ }
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpCreateScrollbar --
+ *
+ * Allocate a new TkScrollbar structure.
+ *
+ * Results:
+ * Returns a newly allocated TkScrollbar structure.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+TkScrollbar *
+TkpCreateScrollbar(
+ Tk_Window tkwin) /* New Tk Window. */
+{
+ static int initialized = 0;
+ MacScrollbar * macScrollPtr;
+ TkWindow *winPtr = (TkWindow *)tkwin;
+
+ if (scrollActionProc == NULL) {
+ scrollActionProc = NewControlActionUPP(ScrollbarActionProc);
+ thumbActionProc = NewControlActionUPP(ThumbActionProc);
+ }
+ if (!initialized) {
+ TkMacOSXInitScrollbarMetrics();
+ initialized = 1;
+ }
+ macScrollPtr = (MacScrollbar *) ckalloc(sizeof(MacScrollbar));
+ macScrollPtr->sbHandle = NULL;
+ macScrollPtr->macFlags = 0;
+ SetRect(&macScrollPtr->eraseRect, 0, 0, 0, 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;
+ CGrafPtr destPort, savePort;
+ Boolean portChanged;
+ 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);
+
+ if (macScrollPtr->sbHandle == NULL) {
+ Rect r = {0, 0, 1, 1};
+
+ windowRef = TkMacOSXDrawableWindow(Tk_WindowId(tkwin));
+ CreateScrollBarControl(windowRef, &r, 0, 0, 0, 0, true, NULL,
+ &(macScrollPtr->sbHandle));
+ SetControlReference(macScrollPtr->sbHandle, (SInt32) scrollPtr);
+
+ if (IsWindowActive(windowRef)) {
+ macScrollPtr->macFlags |= ACTIVE;
+ }
+ }
+
+ /*
+ * Update the control values before we draw.
+ */
+
+ UpdateControlValues(macScrollPtr);
+
+ /*
+ * Set up port for drawing Macintosh control.
+ */
+ destPort = TkMacOSXGetDrawablePort(Tk_WindowId(tkwin));
+ portChanged = QDSwapPort(destPort, &savePort);
+ TkMacOSXSetUpClippingRgn(Tk_WindowId(tkwin));
+
+ /*
+ * Scrollbars do not erase the complete control bounds if they are wider
+ * than the standard width, so manually erase the extra space.
+ */
+
+ if (!EmptyRect(&macScrollPtr->eraseRect)) {
+ EraseRect(&macScrollPtr->eraseRect);
+ }
+
+ Draw1Control(macScrollPtr->sbHandle);
+
+ if (portChanged) {
+ QDSwapPort(savePort, NULL);
+ }
+
+ 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(
+ 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. */
+{
+ int variant, fieldLength;
+
+ if (scrollPtr->highlightWidth < 0) {
+ scrollPtr->highlightWidth = 0;
+ }
+ scrollPtr->inset = scrollPtr->highlightWidth + scrollPtr->borderWidth;
+ variant = ((scrollPtr->vertical ? Tk_Width(scrollPtr->tkwin) :
+ Tk_Height(scrollPtr->tkwin)) - 2 * scrollPtr->inset
+ < metrics[0].width) ? 1 : 0;
+ scrollPtr->arrowLength = (metrics[variant].topArrowHeight +
+ metrics[variant].bottomArrowHeight) / 2;
+ 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 +
+ metrics[variant].minThumbHeight)) {
+ scrollPtr->sliderLast = scrollPtr->sliderFirst +
+ metrics[variant].minThumbHeight;
+ }
+ if (scrollPtr->sliderLast > fieldLength) {
+ scrollPtr->sliderLast = fieldLength;
+ }
+ scrollPtr->sliderFirst += scrollPtr->inset +
+ metrics[variant].topArrowHeight;
+ scrollPtr->sliderLast += scrollPtr->inset +
+ metrics[variant].bottomArrowHeight;
+
+ /*
+ * 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) +
+ metrics[variant].minThumbHeight);
+ } else {
+ Tk_GeometryRequest(scrollPtr->tkwin, 2 * (scrollPtr->arrowLength +
+ scrollPtr->borderWidth + scrollPtr->inset) +
+ metrics[variant].minThumbHeight, scrollPtr->width +
+ 2 * scrollPtr->inset);
+ }
+ 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;
+ CGrafPtr destPort, savePort;
+ Boolean portChanged;
+ int inactive = 0;
+ ControlPartCode part;
+ Point where = {y, x};
+ Rect bounds;
+
+ if ((x < scrollPtr->inset) || (x >= (Tk_Width(scrollPtr->tkwin) -
+ scrollPtr->inset)) || (y < scrollPtr->inset) ||
+ (y >= (Tk_Height(scrollPtr->tkwin) - 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));
+ portChanged = QDSwapPort(destPort, &savePort);
+ UpdateControlValues(macScrollPtr);
+ if (!IsControlActive(macScrollPtr->sbHandle)) {
+ inactive = true;
+ ActivateControl(macScrollPtr->sbHandle);
+ }
+ TkMacOSXWinBounds((TkWindow *) scrollPtr->tkwin, &bounds);
+ where.h += bounds.left;
+ where.v += bounds.top;
+ part = TestControl(((MacScrollbar *) scrollPtr)->sbHandle, where);
+ if (inactive) {
+ DeactivateControl(macScrollPtr->sbHandle);
+ }
+ if (portChanged) {
+ QDSwapPort(savePort, NULL);
+ }
+ switch (part) {
+ case kAppearancePartUpButton:
+ return TOP_ARROW;
+ case kAppearancePartPageUpArea:
+ return TOP_GAP;
+ case kAppearancePartIndicator:
+ return SLIDER;
+ case kAppearancePartPageDownArea:
+ return BOTTOM_GAP;
+ case kAppearancePartDownButton:
+ return BOTTOM_ARROW;
+ default:
+ return OUTSIDE;
+ }
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * ThumbActionProc --
+ *
+ * Callback procedure used by the Macintosh toolbox call
+ * HandleControlClick. 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(
+ ControlRef theControl,
+ ControlPartCode partCode)
+{
+ TkScrollbar *scrollPtr = (TkScrollbar *)(intptr_t)
+ GetControlReference(theControl);
+ MacScrollbar *macScrollPtr = (MacScrollbar *) scrollPtr;
+ Tcl_DString cmdString;
+ /*int origValue;*/ /* dead code */
+ int variant;
+ short trackBarSize;
+ double oldFirstFraction, newFirstFraction;
+ char valueString[40];
+ Point currentPoint = { 0, 0 };
+ Rect trackRect;
+ Tcl_Interp *interp;
+ MouseTrackingResult trackingResult;
+ OSStatus err;
+
+ if (scrollPtr == NULL) {
+ return;
+ }
+
+ Tcl_DStringInit(&cmdString);
+ /*origValue = GetControl32BitValue(macScrollPtr->sbHandle);*/ /* dead code */
+ GetControlBounds(macScrollPtr->sbHandle, &trackRect);
+
+ if (scrollPtr->vertical) {
+ variant = (trackRect.right - trackRect.left) < metrics[0].width ? 1 : 0;
+ trackBarSize = trackRect.bottom - trackRect.top -
+ metrics[variant].topArrowHeight -
+ metrics[variant].bottomArrowHeight;
+ InsetRect(&trackRect, -25, -113);
+ } else {
+ variant = (trackRect.bottom - trackRect.top) < metrics[0].width ? 1 : 0;
+ trackBarSize = trackRect.right - trackRect.left -
+ metrics[variant].topArrowHeight -
+ metrics[variant].bottomArrowHeight;
+ 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. Since the mouse may move a distance too small to cause a
+ * change to the first fraction, each calculation must be done versus what
+ * the first fraction was when the mouse button was initially pressed.
+ * Otherwise, moving the mouse too slowly will cause the calculated
+ * fraction delta to be zero and the scrollbar won't respond.
+ */
+
+ oldFirstFraction = scrollPtr->firstFraction;
+
+ TkMacOSXTrackingLoop(1);
+ do {
+ err = ChkErr(TrackMouseLocationWithOptions, NULL,
+ kTrackMouseLocationOptionDontConsumeMouseUp,
+ kEventDurationForever, &currentPoint, NULL, &trackingResult);
+ if ((err == noErr) && ((trackingResult == kMouseTrackingMouseDragged)
+ || (trackingResult == kMouseTrackingMouseMoved))) {
+ /*
+ * Calculate where the scrollbar should move to, based on where the
+ * mouse button was pressed and where the scrollbar initially was
+ * at that time. Note that PtInRect() will return false if
+ * currentPoint or trackRect are not in is not in current graphics
+ * port, which may happen if any of the waiting idle events change
+ * the port (e.g. with SetPort()) but fail to restore it before
+ * returning and the scrollbar will lock in place.
+ */
+
+ newFirstFraction = oldFirstFraction;
+ if (PtInRect(currentPoint, &trackRect)) {
+ short pixDiff;
+
+ if (scrollPtr->vertical) {
+ pixDiff = currentPoint.v - mouseDownPoint.v;
+ } else {
+ pixDiff = currentPoint.h - mouseDownPoint.h;
+ }
+ newFirstFraction += (double)pixDiff / trackBarSize;
+ if (newFirstFraction > 1.0) {
+ newFirstFraction = 1.0;
+ } else if (newFirstFraction < 0.0) {
+ newFirstFraction = 0.0;
+ }
+ }
+
+ /*
+ * Move the scrollbar thumb to the new first fraction given its
+ * position when initially pressed and how far the mouse has
+ * moved. Process waiting idle tasks afterward to allow for the
+ * display to update.
+ */
+
+ Tcl_PrintDouble(NULL, newFirstFraction, valueString);
+ Tcl_DStringSetLength(&cmdString, 0);
+ Tcl_DStringAppend(&cmdString, scrollPtr->command,
+ scrollPtr->commandSize);
+ Tcl_DStringAppendElement(&cmdString, "moveto");
+ Tcl_DStringAppendElement(&cmdString, valueString);
+ interp = scrollPtr->interp;
+ Tcl_Preserve(interp);
+ Tcl_EvalEx(interp, Tcl_DStringValue(&cmdString),
+ Tcl_DStringLength(&cmdString), TCL_EVAL_GLOBAL);
+ Tcl_Release(interp);
+ TkMacOSXRunTclEventLoop();
+ }
+ } while ((err == noErr) && trackingResult != kMouseTrackingMouseReleased);
+ TkMacOSXTrackingLoop(0);
+ Tcl_DStringFree(&cmdString);
+ return;
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * ScrollbarActionProc --
+ *
+ * Callback procedure used by the Macintosh toolbox call
+ * HandleControlClick. 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 *)(intptr_t)
+ GetControlReference(theControl);
+ MacScrollbar *macScrollPtr = (MacScrollbar *) scrollPtr;
+ Tcl_DString cmdString;
+
+ Tcl_DStringInit(&cmdString);
+ Tcl_DStringAppend(&cmdString, scrollPtr->command,
+ scrollPtr->commandSize);
+
+ if ( partCode == kAppearancePartUpButton ||
+ partCode == kAppearancePartDownButton ) {
+ Tcl_DStringAppendElement(&cmdString, "scroll");
+ Tcl_DStringAppendElement(&cmdString,
+ (partCode == kAppearancePartUpButton) ? "-1" : "1");
+ Tcl_DStringAppendElement(&cmdString, "unit");
+ } else if (partCode == kAppearancePartPageUpArea ||
+ partCode == kAppearancePartPageDownArea ) {
+ Tcl_DStringAppendElement(&cmdString, "scroll");
+ Tcl_DStringAppendElement(&cmdString,
+ (partCode == kAppearancePartPageUpArea) ? "-1" : "1");
+ Tcl_DStringAppendElement(&cmdString, "page");
+ } else if (partCode == kAppearancePartIndicator) {
+ char valueString[TCL_DOUBLE_SPACE];
+
+ Tcl_PrintDouble(NULL, (GetControl32BitValue(macScrollPtr->sbHandle) -
+ MIN_SCROLLBAR_VALUE) / SCROLLBAR_SCALING_VALUE, valueString);
+ Tcl_DStringAppendElement(&cmdString, "moveto");
+ Tcl_DStringAppendElement(&cmdString, valueString);
+ }
+ Tcl_Preserve(scrollPtr->interp);
+ Tcl_EvalEx(scrollPtr->interp, Tcl_DStringValue(&cmdString),
+ Tcl_DStringLength(&cmdString), TCL_EVAL_GLOBAL);
+ Tcl_Release(scrollPtr->interp);
+ Tcl_DStringFree(&cmdString);
+ TkMacOSXRunTclEventLoop();
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * 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(scrollPtr);
+ macScrollPtr->macFlags |= IN_MODAL_LOOP;
+
+ if (eventPtr->type == ButtonPress) {
+ Point where;
+ Rect bounds;
+ ControlPartCode part;
+ CGrafPtr destPort, savePort;
+ Boolean portChanged;
+ 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));
+ portChanged = QDSwapPort(destPort, &savePort);
+ 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);
+ TkMacOSXTrackingLoop(1);
+ if (part == kAppearancePartIndicator && 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.
+ */
+
+ mouseDownPoint.h = where.h;
+ mouseDownPoint.v = where.v;
+ HandleControlClick(macScrollPtr->sbHandle, where,
+ TkMacOSXModifierState(), thumbActionProc);
+ } else if (part == kAppearancePartIndicator) {
+ /*
+ * Case 2: in thumb with jump scrolling. Call HandleControlClick
+ * with a NULL action proc. Use the new value of the control to
+ * set update the control.
+ */
+
+ part = HandleControlClick(macScrollPtr->sbHandle, where,
+ TkMacOSXModifierState(), NULL);
+ if (part == kAppearancePartIndicator) {
+ Tcl_DString cmdString;
+ char valueString[TCL_DOUBLE_SPACE];
+
+ Tcl_PrintDouble(NULL,
+ (GetControl32BitValue(macScrollPtr->sbHandle) -
+ MIN_SCROLLBAR_VALUE) / SCROLLBAR_SCALING_VALUE,
+ valueString);
+ Tcl_DStringInit(&cmdString);
+ Tcl_DStringAppend(&cmdString, scrollPtr->command,
+ strlen(scrollPtr->command));
+ Tcl_DStringAppendElement(&cmdString, "moveto");
+ Tcl_DStringAppendElement(&cmdString, valueString);
+
+ interp = scrollPtr->interp;
+ Tcl_Preserve(interp);
+ Tcl_EvalEx(interp, Tcl_DStringValue(&cmdString),
+ Tcl_DStringLength(&cmdString), TCL_EVAL_GLOBAL);
+ Tcl_Release(interp);
+ Tcl_DStringFree(&cmdString);
+ TkMacOSXRunTclEventLoop();
+ }
+ } else if (part != 0) {
+ /*
+ * Case 3: in any other part of the scrollbar. We call
+ * HandleControlClick with the scrollActionProc which will do most
+ * all the work.
+ */
+
+ HandleControlClick(macScrollPtr->sbHandle, where,
+ TkMacOSXModifierState(), scrollActionProc);
+
+ /*
+ * Workaround for Carbon bug where the scrollbar down arrow
+ * sometimes gets "stuck" after the mousebutton has been released.
+ */
+
+ if (scrollPtr->tkwin) {
+ TkMacOSXSetUpClippingRgn(Tk_WindowId(scrollPtr->tkwin));
+ }
+ Draw1Control(macScrollPtr->sbHandle);
+ }
+ TkMacOSXTrackingLoop(0);
+
+ /*
+ * The HandleControlClick call will "eat" the ButtonUp event. We now
+ * generate a ButtonUp event so Tk will unset implicit grabs etc.
+ */
+
+ if (scrollPtr->tkwin) {
+ window = Tk_WindowId(scrollPtr->tkwin);
+ TkGenerateButtonEventForXPointer(window);
+ }
+
+ if (portChanged) {
+ QDSwapPort(savePort, NULL);
+ }
+ }
+
+ if (macScrollPtr->sbHandle && (macScrollPtr->macFlags & ALREADY_DEAD)) {
+ DisposeControl(macScrollPtr->sbHandle);
+ macScrollPtr->sbHandle = NULL;
+ }
+ macScrollPtr->macFlags &= ~IN_MODAL_LOOP;
+ Tcl_Release(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);
+ double dViewSize;
+ Rect contrlRect, portRect;
+ int variant, active;
+ short width, height;
+
+ 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;
+
+ GetPortBounds(GetWindowPort(GetControlOwner(macScrollPtr->sbHandle)),
+ &portRect);
+
+ /*
+ * If the scrollbar is flush against the bottom right hand corner then we
+ * leave space to draw the grow region for the window.
+ */
+
+ if (portRect.bottom == contrlRect.bottom &&
+ portRect.right == contrlRect.right) {
+ TkMacOSXSetScrollbarGrow((TkWindow *) tkwin, true);
+ if (macDraw->toplevel &&
+ TkMacOSXResizable(macDraw->toplevel->winPtr)) {
+ int growSize;
+
+ switch (TkMacOSXWindowClass(macDraw->toplevel->winPtr)) {
+ case kFloatingWindowClass:
+ case kUtilityWindowClass:
+ growSize = metrics[1].width - 1;
+ break;
+ case kDocumentWindowClass:
+ case kMovableAlertWindowClass:
+ case kMovableModalWindowClass:
+ default:
+ growSize = metrics[0].width - 1;
+ break;
+ }
+ if (scrollPtr->vertical) {
+ contrlRect.bottom -= growSize;
+ } else {
+ contrlRect.right -= growSize;
+ }
+ }
+ } else {
+ TkMacOSXSetScrollbarGrow((TkWindow *) tkwin, false);
+ }
+
+ if (IsControlVisible (macScrollPtr->sbHandle)) {
+ SetControlVisibility(macScrollPtr->sbHandle, false, false);
+ }
+
+ if (scrollPtr->vertical) {
+ width = contrlRect.right - contrlRect.left;
+ height = contrlRect.bottom - contrlRect.top;
+ } else {
+ width = contrlRect.bottom - contrlRect.top;
+ height = contrlRect.right - contrlRect.left;
+ }
+ variant = width < metrics[0].width ? 1 : 0;
+ SetControlData(macScrollPtr->sbHandle, kControlEntireControl,
+ kControlSizeTag, sizeof(ControlSize),
+ &(metrics[variant].size));
+
+ macScrollPtr->eraseRect = contrlRect;
+ if (scrollPtr->vertical) {
+ macScrollPtr->eraseRect.left += metrics[variant].width;
+ } else {
+ macScrollPtr->eraseRect.top += metrics[variant].width;
+ }
+
+ /*
+ * Ensure we set scrollbar control bounds only once all size adjustments
+ * have been computed.
+ */
+
+ SetControlBounds(macScrollPtr->sbHandle, &contrlRect);
+
+ /*
+ * Given the Tk parameters for the fractions of the start and end of the
+ * thumb, the following calculation determines the location for the
+ * Macintosh thumb. The Aqua scroll control works as follows. The
+ * scrollbar's value is the position of the left (or top) side of the view
+ * area in the content area being scrolled. The maximum value of the
+ * control is therefore the dimension of the content area less the size of
+ * the view area. Since these values are all integers, and Tk gives the
+ * thumb position as fractions, we have introduced a scaling factor.
+ */
+
+ dViewSize = (scrollPtr->lastFraction - scrollPtr->firstFraction)
+ * SCROLLBAR_SCALING_VALUE;
+ SetControl32BitMinimum(macScrollPtr->sbHandle, MIN_SCROLLBAR_VALUE);
+ SetControl32BitMaximum(macScrollPtr->sbHandle, MIN_SCROLLBAR_VALUE +
+ SCROLLBAR_SCALING_VALUE - dViewSize);
+ SetControlViewSize(macScrollPtr->sbHandle, dViewSize);
+ SetControl32BitValue(macScrollPtr->sbHandle, MIN_SCROLLBAR_VALUE +
+ SCROLLBAR_SCALING_VALUE * scrollPtr->firstFraction);
+
+ if((scrollPtr->firstFraction <= 0.0 && scrollPtr->lastFraction >= 1.0)
+ || height <= metrics[variant].minHeight) {
+ /* Disable scrollbar */
+ SetControl32BitMaximum(macScrollPtr->sbHandle, MIN_SCROLLBAR_VALUE);
+ }
+ active = ((macScrollPtr->macFlags & ACTIVE) != 0);
+ if (active != IsControlActive(macScrollPtr->sbHandle)) {
+ if (active) {
+ ActivateControl(macScrollPtr->sbHandle);
+ } else {
+ DeactivateControl(macScrollPtr->sbHandle);
+ }
+ }
+ SetControlVisibility(macScrollPtr->sbHandle, true, false);
+}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */