diff options
Diffstat (limited to 'carbon/tkMacOSXScrlbr.c')
| -rw-r--r-- | carbon/tkMacOSXScrlbr.c | 1017 |
1 files changed, 1017 insertions, 0 deletions
diff --git a/carbon/tkMacOSXScrlbr.c b/carbon/tkMacOSXScrlbr.c new file mode 100644 index 0000000..c991c88 --- /dev/null +++ b/carbon/tkMacOSXScrlbr.c @@ -0,0 +1,1017 @@ +/* + * 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. + */ + +#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 */ +}; + +/* + * 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 ScrollbarPress(MacScrollbar *, XEvent *); +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. + */ + +const Tk_ClassProcs tkpScrollbarProcs = { + sizeof(Tk_ClassProcs), /* size */ + NULL, /* worldChangedProc */ + NULL, /* createProc */ + NULL /* modalProc */ +}; + +/* + *---------------------------------------------------------------------- + * + * 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; + + 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(tkDefScrollbarWidth, "%ld", metrics[0].width); +} + +/* + *---------------------------------------------------------------------- + * + * 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; + + if (scrollActionProc == NULL) { + scrollActionProc = NewControlActionUPP(ScrollbarActionProc); + thumbActionProc = NewControlActionUPP(ThumbActionProc); + } + if (!initialized) { + TkMacOSXInitScrollbarMetrics(); + initialized = 1; + } + macScrollPtr = ckalloc(sizeof(MacScrollbar)); + macScrollPtr->sbHandle = NULL; + macScrollPtr->macFlags = 0; + SetRect(&macScrollPtr->eraseRect, 0, 0, 0, 0); + + Tk_CreateEventHandler(tkwin, ActivateMask|ExposureMask| + StructureNotifyMask|FocusChangeMask|ButtonPressMask, + ScrollbarEventProc, (ClientData) macScrollPtr); + + 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, ¤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. + */ + + 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(); +} + +/* + *-------------------------------------------------------------- + * + * ScrollbarPress -- + * + * This procedure is invoked in response to <ButtonPress> events. + * Enters a modal loop to handle scrollbar interactions. + * + *-------------------------------------------------------------- + */ + +static int +ScrollbarPress(MacScrollbar *macScrollPtr, XEvent *eventPtr) +{ + TkScrollbar *scrollPtr = &macScrollPtr->info; + Point where; + Rect bounds; + ControlPartCode part; + CGrafPtr destPort, savePort; + Boolean portChanged; + Window window; + + Tcl_Preserve(scrollPtr); + macScrollPtr->macFlags |= IN_MODAL_LOOP; + + /* + * 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_Interp *interp = scrollPtr->interp; + 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); + + 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 if (eventPtr->type == ButtonPress) { + ScrollbarPress(macScrollPtr, eventPtr); + } 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: + */ |