/* * 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 * * 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 1.5.2.15 2007/06/29 03:22:02 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"), "", 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(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. */ { 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, 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); 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, ¤tPoint, 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. */ 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_EvalEx(interp, Tcl_DStringValue(&cmdString), Tcl_DStringLength(&cmdString), TCL_EVAL_GLOBAL); Tcl_Release((ClientData) 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]; sprintf(valueString, "%g", (GetControl32BitValue(macScrollPtr->sbHandle) - MIN_SCROLLBAR_VALUE) / SCROLLBAR_SCALING_VALUE); Tcl_DStringAppendElement(&cmdString, "moveto"); Tcl_DStringAppendElement(&cmdString, valueString); } Tcl_Preserve((ClientData) scrollPtr->interp); Tcl_EvalEx(scrollPtr->interp, Tcl_DStringValue(&cmdString), Tcl_DStringLength(&cmdString), TCL_EVAL_GLOBAL); Tcl_Release((ClientData) scrollPtr->interp); Tcl_DStringFree(&cmdString); TkMacOSXRunTclEventLoop(); } /* *-------------------------------------------------------------- * * ScrollbarBindProc -- * * This procedure is invoked when the default * 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; 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; part = 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]; sprintf(valueString, "%g", (GetControl32BitValue(macScrollPtr->sbHandle) - MIN_SCROLLBAR_VALUE) / SCROLLBAR_SCALING_VALUE); Tcl_DStringInit(&cmdString); Tcl_DStringAppend(&cmdString, scrollPtr->command, strlen(scrollPtr->command)); Tcl_DStringAppendElement(&cmdString, "moveto"); Tcl_DStringAppendElement(&cmdString, valueString); interp = scrollPtr->interp; Tcl_Preserve((ClientData) interp); Tcl_EvalEx(interp, Tcl_DStringValue(&cmdString), Tcl_DStringLength(&cmdString), TCL_EVAL_GLOBAL); Tcl_Release((ClientData) 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((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); 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); }