src/plugins/platforms/cocoa/qcocoawindow.mm

   1 /****************************************************************************
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   3 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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   5 **
   6 ** This file is part of the plugins of the Qt Toolkit.
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  21 ** GNU General Public License Usage
  22 ** Alternatively, this file may be used under the terms of the GNU General
  23 ** Public License version 3.0 as published by the Free Software Foundation
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  30 ** Alternatively, this file may be used in accordance with the terms and
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  40 ****************************************************************************/
  41 #include "qcocoawindow.h"
  42 #include "qnswindowdelegate.h"
  43 #include "qcocoaautoreleasepool.h"
  44 #include "qcocoaeventdispatcher.h"
  45 #include "qcocoaglcontext.h"
  46 #include "qcocoahelpers.h"
  47 #include "qnsview.h"
  48 #include <QtCore/private/qcore_mac_p.h>
  49 #include <qwindow.h>
  50 #include <qpa/qwindowsysteminterface.h>
  51 #include <qpa/qplatformscreen.h>
  52
  53 #include <Cocoa/Cocoa.h>
  54 #include <Carbon/Carbon.h>
  55
  56 #include <QDebug>
  57
  58 static bool isMouseEvent(NSEvent *ev)
  59 {
  60     switch ([ev type]) {
  61     case NSLeftMouseDown:
  62     case NSLeftMouseUp:
  63     case NSRightMouseDown:
  64     case NSRightMouseUp:
  65     case NSMouseMoved:
  66     case NSLeftMouseDragged:
  67     case NSRightMouseDragged:
  68         return true;
  69     default:
  70         return false;
  71     }
  72 }
  73
  74 @interface NSWindow (CocoaWindowCategory)
  75 - (void) clearPlatformWindow;
  76 - (NSRect) legacyConvertRectFromScreen:(NSRect) rect;
  77 @end
  78
  79 @implementation NSWindow (CocoaWindowCategory)
  80 - (void) clearPlatformWindow
  81 {
  82 }
  83
  84 - (NSRect) legacyConvertRectFromScreen:(NSRect) rect
  85 {
  86 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
  87     if (QSysInfo::QSysInfo::MacintoshVersion >= QSysInfo::MV_10_7) {
  88         return [self convertRectFromScreen: rect];
  89     }
  90 #endif
  91     NSRect r = rect;
  92     r.origin = [self convertScreenToBase:rect.origin];
  93     return r;
  94 }
  95 @end
  96
  97 @implementation QNSWindow
  98
  99 - (BOOL)canBecomeKeyWindow
 100 {
 101     // The default implementation returns NO for title-bar less windows,
 102     // override and return yes here to make sure popup windows such as
 103     // the combobox popup can become the key window.
 104     return YES;
 105 }
 106
 107 - (BOOL)canBecomeMainWindow
 108 {
 109     BOOL canBecomeMain = YES; // By default, windows can become the main window
 110
 111     // Windows with a transient parent (such as combobox popup windows)
 112     // cannot become the main window:
 113     if (m_cocoaPlatformWindow->window()->transientParent())
 114         canBecomeMain = NO;
 115
 116     return canBecomeMain;
 117 }
 118
 119 - (void) sendEvent: (NSEvent*) theEvent
 120 {
 121     [super sendEvent: theEvent];
 122
 123     if (!m_cocoaPlatformWindow)
 124         return;
 125
 126     if (m_cocoaPlatformWindow->frameStrutEventsEnabled() && isMouseEvent(theEvent)) {
 127         NSPoint loc = [theEvent locationInWindow];
 128         NSRect windowFrame = [self legacyConvertRectFromScreen:[self frame]];
 129         NSRect contentFrame = [[self contentView] frame];
 130         if (NSMouseInRect(loc, windowFrame, NO) &&
 131             !NSMouseInRect(loc, contentFrame, NO))
 132         {
 133             QNSView *contentView = (QNSView *) m_cocoaPlatformWindow->contentView();
 134             [contentView handleFrameStrutMouseEvent: theEvent];
 135         }
 136     }
 137 }
 138
 139 - (void)clearPlatformWindow
 140 {
 141     m_cocoaPlatformWindow = 0;
 142 }
 143
 144 @end
 145
 146 @implementation QNSPanel
 147
 148 - (BOOL)canBecomeKeyWindow
 149 {
 150     // Most panels can be come the key window. Exceptions are:
 151     if (m_cocoaPlatformWindow->window()->windowType() == Qt::ToolTip)
 152         return NO;
 153     if (m_cocoaPlatformWindow->window()->windowType() == Qt::SplashScreen)
 154         return NO;
 155     return YES;
 156 }
 157
 158 - (void) sendEvent: (NSEvent*) theEvent
 159 {
 160     [super sendEvent: theEvent];
 161
 162     if (!m_cocoaPlatformWindow)
 163         return;
 164
 165     if (m_cocoaPlatformWindow->frameStrutEventsEnabled() && isMouseEvent(theEvent)) {
 166         NSPoint loc = [theEvent locationInWindow];
 167         NSRect windowFrame = [self legacyConvertRectFromScreen:[self frame]];
 168         NSRect contentFrame = [[self contentView] frame];
 169         if (NSMouseInRect(loc, windowFrame, NO) &&
 170             !NSMouseInRect(loc, contentFrame, NO))
 171         {
 172             QNSView *contentView = (QNSView *) m_cocoaPlatformWindow->contentView();
 173             [contentView handleFrameStrutMouseEvent: theEvent];
 174         }
 175     }
 176 }
 177
 178 - (void)clearPlatformWindow
 179 {
 180     m_cocoaPlatformWindow = 0;
 181 }
 182
 183 @end
 184
 185 QCocoaWindow::QCocoaWindow(QWindow *tlw)
 186     : QPlatformWindow(tlw)
 187     , m_nsWindow(0)
 188     , m_synchedWindowState(Qt::WindowActive)
 189     , m_inConstructor(true)
 190     , m_glContext(0)
 191     , m_menubar(0)
 192     , m_hasModalSession(false)
 193     , m_frameStrutEventsEnabled(false)
 194 {
 195 #ifdef QT_COCOA_ENABLE_WINDOW_DEBUG
 196     qDebug() << "QCocoaWindow::QCocoaWindow" << this;
 197 #endif
 198     QCocoaAutoReleasePool pool;
 199
 200     m_contentView = [[QNSView alloc] initWithQWindow:tlw platformWindow:this];
 201     setGeometry(tlw->geometry());
 202
 203     recreateWindow(parent());
 204
 205     m_inConstructor = false;
 206 }
 207
 208 QCocoaWindow::~QCocoaWindow()
 209 {
 210 #ifdef QT_COCOA_ENABLE_WINDOW_DEBUG
 211     qDebug() << "QCocoaWindow::~QCocoaWindow" << this;
 212 #endif
 213
 214     clearNSWindow(m_nsWindow);
 215     [m_contentView release];
 216     [m_nsWindow release];
 217 }
 218
 219 void QCocoaWindow::setGeometry(const QRect &rect)
 220 {
 221     if (geometry() == rect)
 222         return;
 223 #ifdef QT_COCOA_ENABLE_WINDOW_DEBUG
 224     qDebug() << "QCocoaWindow::setGeometry" << this << rect;
 225 #endif
 226     QPlatformWindow::setGeometry(rect);
 227     setCocoaGeometry(rect);
 228 }
 229
 230 void QCocoaWindow::setCocoaGeometry(const QRect &rect)
 231 {
 232     if (m_nsWindow) {
 233         NSRect bounds = qt_mac_flipRect(rect, window());
 234         [m_nsWindow setContentSize : bounds.size];
 235         [m_nsWindow setFrameOrigin : bounds.origin];
 236     } else {
 237         [m_contentView setFrame : NSMakeRect(rect.x(), rect.y(), rect.width(), rect.height())];
 238     }
 239 }
 240
 241 void QCocoaWindow::setVisible(bool visible)
 242 {
 243     QCocoaAutoReleasePool pool;
 244 #ifdef QT_COCOA_ENABLE_WINDOW_DEBUG
 245     qDebug() << "QCocoaWindow::setVisible" << window() << visible;
 246 #endif
 247     if (visible) {
 248         QCocoaWindow *parentCocoaWindow = 0;
 249         if (window()->transientParent()) {
 250             parentCocoaWindow = static_cast<QCocoaWindow *>(window()->transientParent()->handle());
 251
 252             // The parent window might have moved while this window was hidden,
 253             // update the window geometry if there is a parent.
 254             setGeometry(window()->geometry());
 255
 256             // Register popup windows so that the parent window can
 257             // close them when needed.
 258             if (window()->windowType() == Qt::Popup) {
 259                 // qDebug() << "transientParent and popup" << window()->windowType() << Qt::Popup << (window()->windowType() & Qt::Popup);
 260                 parentCocoaWindow->m_activePopupWindow = window();
 261             }
 262
 263         }
 264
 265         // Make sure the QWindow has a frame ready before we show the NSWindow.
 266         QWindowSystemInterface::handleSynchronousExposeEvent(window(), QRect(QPoint(), geometry().size()));
 267
 268         if (m_nsWindow) {
 269             // setWindowState might have been called while the window was hidden and
 270             // will not change the NSWindow state in that case. Sync up here:
 271             syncWindowState(window()->windowState());
 272
 273             if (window()->windowState() != Qt::WindowMinimized) {
 274                 if ((window()->windowModality() == Qt::WindowModal
 275                      || window()->windowType() == Qt::Sheet)
 276                         && parentCocoaWindow) {
 277                     // show the window as a sheet
 278                     [NSApp beginSheet:m_nsWindow modalForWindow:parentCocoaWindow->m_nsWindow modalDelegate:nil didEndSelector:nil contextInfo:nil];
 279                 } else if (window()->windowModality() != Qt::NonModal) {
 280                     // show the window as application modal
 281                     QCocoaEventDispatcher *cocoaEventDispatcher = qobject_cast<QCocoaEventDispatcher *>(QGuiApplication::instance()->eventDispatcher());
 282                     Q_ASSERT(cocoaEventDispatcher != 0);
 283                     QCocoaEventDispatcherPrivate *cocoaEventDispatcherPrivate = static_cast<QCocoaEventDispatcherPrivate *>(QObjectPrivate::get(cocoaEventDispatcher));
 284                     cocoaEventDispatcherPrivate->beginModalSession(window());
 285                     m_hasModalSession = true;
 286                 } else if ([m_nsWindow canBecomeKeyWindow]) {
 287                     [m_nsWindow makeKeyAndOrderFront:nil];
 288                 } else {
 289                     [m_nsWindow orderFront: nil];
 290                 }
 291             }
 292         }
 293     } else {
 294         // qDebug() << "close" << this;
 295         if (m_nsWindow) {
 296             if (m_hasModalSession) {
 297                 QCocoaEventDispatcher *cocoaEventDispatcher = qobject_cast<QCocoaEventDispatcher *>(QGuiApplication::instance()->eventDispatcher());
 298                 Q_ASSERT(cocoaEventDispatcher != 0);
 299                 QCocoaEventDispatcherPrivate *cocoaEventDispatcherPrivate = static_cast<QCocoaEventDispatcherPrivate *>(QObjectPrivate::get(cocoaEventDispatcher));
 300                 cocoaEventDispatcherPrivate->endModalSession(window());
 301                 m_hasModalSession = false;
 302             } else {
 303                 if ([m_nsWindow isSheet])
 304                     [NSApp endSheet:m_nsWindow];
 305             }
 306             [m_nsWindow orderOut:m_nsWindow];
 307         }
 308         if (!QCoreApplication::closingDown())
 309             QWindowSystemInterface::handleExposeEvent(window(), QRegion());
 310     }
 311 }
 312
 313 Qt::WindowFlags QCocoaWindow::setWindowFlags(Qt::WindowFlags flags)
 314 {
 315     m_windowFlags = flags;
 316     return m_windowFlags;
 317 }
 318
 319 Qt::WindowState QCocoaWindow::setWindowState(Qt::WindowState state)
 320 {
 321     if ([m_nsWindow isVisible])
 322         syncWindowState(state);  // Window state set for hidden windows take effect when show() is called.
 323
 324     return state;
 325 }
 326
 327 void QCocoaWindow::setWindowTitle(const QString &title)
 328 {
 329     QCocoaAutoReleasePool pool;
 330     if (!m_nsWindow)
 331         return;
 332
 333     CFStringRef windowTitle = QCFString::toCFStringRef(title);
 334     [m_nsWindow setTitle: const_cast<NSString *>(reinterpret_cast<const NSString *>(windowTitle))];
 335     CFRelease(windowTitle);
 336 }
 337
 338 void QCocoaWindow::raise()
 339 {
 340     //qDebug() << "raise" << this;
 341     // ### handle spaces (see Qt 4 raise_sys in qwidget_mac.mm)
 342     if (!m_nsWindow)
 343         return;
 344     if ([m_nsWindow isVisible])
 345         [m_nsWindow orderFront: m_nsWindow];
 346 }
 347
 348 void QCocoaWindow::lower()
 349 {
 350     if (!m_nsWindow)
 351         return;
 352     if ([m_nsWindow isVisible])
 353         [m_nsWindow orderBack: m_nsWindow];
 354 }
 355
 356 void QCocoaWindow::propagateSizeHints()
 357 {
 358     QCocoaAutoReleasePool pool;
 359     if (!m_nsWindow)
 360         return;
 361
 362 #ifdef QT_COCOA_ENABLE_WINDOW_DEBUG
 363     qDebug() << "QCocoaWindow::propagateSizeHints" << this;
 364     qDebug() << "     min/max " << window()->minimumSize() << window()->maximumSize();
 365     qDebug() << "size increment" << window()->sizeIncrement();
 366     qDebug() << "     basesize" << window()->baseSize();
 367     qDebug() << "     geometry" << geometry();
 368 #endif
 369
 370     // Set the minimum content size.
 371     const QSize minimumSize = window()->minimumSize();
 372     if (!minimumSize.isValid()) // minimumSize is (-1, -1) when not set. Make that (0, 0) for Cocoa.
 373         [m_nsWindow setContentMinSize : NSMakeSize(0.0, 0.0)];
 374     [m_nsWindow setContentMinSize : NSMakeSize(minimumSize.width(), minimumSize.height())];
 375
 376     // Set the maximum content size.
 377     const QSize maximumSize = window()->maximumSize();
 378     [m_nsWindow setContentMaxSize : NSMakeSize(maximumSize.width(), maximumSize.height())];
 379
 380     // sizeIncrement is observed to take values of (-1, -1) and (0, 0) for windows that should be
 381     // resizable and that have no specific size increment set. Cocoa expects (1.0, 1.0) in this case.
 382     if (!window()->sizeIncrement().isEmpty())
 383         [m_nsWindow setResizeIncrements : qt_mac_toNSSize(window()->sizeIncrement())];
 384     else
 385         [m_nsWindow setResizeIncrements : NSMakeSize(1.0, 1.0)];
 386
 387     QRect rect = geometry();
 388     QSize baseSize = window()->baseSize();
 389     if (!baseSize.isNull() && baseSize.isValid()) {
 390         [m_nsWindow setFrame:NSMakeRect(rect.x(), rect.y(), baseSize.width(), baseSize.height()) display:YES];
 391     }
 392 }
 393
 394 void QCocoaWindow::setOpacity(qreal level)
 395 {
 396     if (m_nsWindow)
 397         [m_nsWindow setAlphaValue:level];
 398 }
 399
 400 bool QCocoaWindow::setKeyboardGrabEnabled(bool grab)
 401 {
 402     if (!m_nsWindow)
 403         return false;
 404
 405     if (grab && ![m_nsWindow isKeyWindow])
 406         [m_nsWindow makeKeyWindow];
 407     else if (!grab && [m_nsWindow isKeyWindow])
 408         [m_nsWindow resignKeyWindow];
 409     return true;
 410 }
 411
 412 bool QCocoaWindow::setMouseGrabEnabled(bool grab)
 413 {
 414     if (!m_nsWindow)
 415         return false;
 416
 417     if (grab && ![m_nsWindow isKeyWindow])
 418         [m_nsWindow makeKeyWindow];
 419     else if (!grab && [m_nsWindow isKeyWindow])
 420         [m_nsWindow resignKeyWindow];
 421     return true;
 422 }
 423
 424 WId QCocoaWindow::winId() const
 425 {
 426     return WId(m_contentView);
 427 }
 428
 429 void QCocoaWindow::setParent(const QPlatformWindow *parentWindow)
 430 {
 431     // recreate the window for compatibility
 432     recreateWindow(parentWindow);
 433     setCocoaGeometry(geometry());
 434 }
 435
 436 NSView *QCocoaWindow::contentView() const
 437 {
 438     return m_contentView;
 439 }
 440
 441 void QCocoaWindow::windowWillMove()
 442 {
 443     // Close any open popups on window move
 444     if (m_activePopupWindow) {
 445         QWindowSystemInterface::handleSynchronousCloseEvent(m_activePopupWindow);
 446         m_activePopupWindow = 0;
 447     }
 448 }
 449
 450 void QCocoaWindow::windowDidMove()
 451 {
 452     [m_contentView updateGeometry];
 453 }
 454
 455 void QCocoaWindow::windowDidResize()
 456 {
 457     if (!m_nsWindow)
 458         return;
 459
 460     NSRect rect = [[m_nsWindow contentView]frame];
 461     // Call setFrameSize which will trigger a frameDidChangeNotification on QNSView.
 462     [[m_nsWindow contentView] setFrameSize:rect.size];
 463 }
 464
 465 void QCocoaWindow::windowWillClose()
 466 {
 467     QWindowSystemInterface::handleSynchronousCloseEvent(window());
 468 }
 469
 470 bool QCocoaWindow::windowIsPopupType() const
 471 {
 472     Qt::WindowType type = window()->windowType();
 473     if (type == Qt::Tool)
 474         return false; // Qt::Tool has the Popup bit set but isn't, at least on Mac.
 475
 476     return ((type & Qt::Popup) == Qt::Popup);
 477 }
 478
 479 void QCocoaWindow::setCurrentContext(QCocoaGLContext *context)
 480 {
 481     m_glContext = context;
 482 }
 483
 484 QCocoaGLContext *QCocoaWindow::currentContext() const
 485 {
 486     return m_glContext;
 487 }
 488
 489 void QCocoaWindow::recreateWindow(const QPlatformWindow *parentWindow)
 490 {
 491     // Remove current window (if any)
 492     if (m_nsWindow) {
 493         clearNSWindow(m_nsWindow);
 494         [m_nsWindow close];
 495         [m_nsWindow release];
 496         m_nsWindow = 0;
 497     }
 498
 499     if (!parentWindow) {
 500         // Create a new NSWindow if this is a top-level window.
 501         m_nsWindow = createNSWindow();
 502         setNSWindow(m_nsWindow);
 503
 504         // QPlatformWindow subclasses must sync up with QWindow on creation:
 505         propagateSizeHints();
 506         setWindowFlags(window()->windowFlags());
 507         setWindowTitle(window()->windowTitle());
 508         setWindowState(window()->windowState());
 509
 510         if (window()->transientParent()) {
 511             // keep this window on the same level as its transient parent (which may be a modal dialog, for example)
 512             QCocoaWindow *parentCocoaWindow = static_cast<QCocoaWindow *>(window()->transientParent()->handle());
 513             [m_nsWindow setLevel:[parentCocoaWindow->m_nsWindow level]];
 514         }
 515     } else {
 516         // Child windows have no NSWindow, link the NSViews instead.
 517         const QCocoaWindow *parentCococaWindow = static_cast<const QCocoaWindow *>(parentWindow);
 518         [parentCococaWindow->m_contentView addSubview : m_contentView];
 519     }
 520 }
 521
 522 NSWindow * QCocoaWindow::createNSWindow()
 523 {
 524     QCocoaAutoReleasePool pool;
 525
 526     NSRect frame = qt_mac_flipRect(window()->geometry(), window());
 527
 528     Qt::WindowType type = window()->windowType();
 529     Qt::WindowFlags flags = window()->windowFlags();
 530
 531     NSUInteger styleMask;
 532     NSWindow *createdWindow = 0;
 533     NSInteger windowLevel = -1;
 534
 535     if (type == Qt::Tool) {
 536         windowLevel = NSFloatingWindowLevel;
 537     } else if ((type & Qt::Popup) == Qt::Popup) {
 538         // styleMask = NSBorderlessWindowMask;
 539         windowLevel = NSPopUpMenuWindowLevel;
 540
 541         // Popup should be in at least the same level as its parent.
 542         const QWindow * const transientParent = window()->transientParent();
 543         const QCocoaWindow * const transientParentWindow = transientParent ? static_cast<QCocoaWindow *>(transientParent->handle()) : 0;
 544         if (transientParentWindow)
 545             windowLevel = qMax([transientParentWindow->m_nsWindow level], windowLevel);
 546     }
 547
 548     // StayOnTop window should appear above Tool windows.
 549     if (flags & Qt::WindowStaysOnTopHint)
 550         windowLevel = NSPopUpMenuWindowLevel;
 551     // Tooltips should appear above StayOnTop windows.
 552     if (type == Qt::ToolTip)
 553         windowLevel = NSScreenSaverWindowLevel;
 554     // All other types are Normal level.
 555     if (windowLevel == -1)
 556         windowLevel = NSNormalWindowLevel;
 557
 558     // Use NSPanel for popup-type windows. (Popup, Tool, ToolTip, SplashScreen)
 559     if ((type & Qt::Popup) == Qt::Popup) {
 560         if (windowIsPopupType()) {
 561             styleMask = NSBorderlessWindowMask;
 562         } else {
 563             styleMask = (NSUtilityWindowMask | NSResizableWindowMask | NSClosableWindowMask |
 564                          NSMiniaturizableWindowMask | NSTitledWindowMask);
 565         }
 566
 567         QNSPanel *window;
 568         window  = [[QNSPanel alloc] initWithContentRect:frame
 569                                          styleMask: styleMask
 570                                          backing:NSBackingStoreBuffered
 571                                          defer:NO]; // Deferring window creation breaks OpenGL (the GL context is set up
 572                                                     // before the window is shown and needs a proper window.).
 573         [window setHasShadow:YES];
 574
 575 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
 576         if (QSysInfo::QSysInfo::MacintoshVersion >= QSysInfo::MV_10_7) {
 577             // Make popup winows show on the same desktop as the parent full-screen window.
 578             [window setCollectionBehavior:NSWindowCollectionBehaviorFullScreenAuxiliary];
 579         }
 580 #endif
 581         window->m_cocoaPlatformWindow = this;
 582         createdWindow = window;
 583     } else {
 584         styleMask = (NSResizableWindowMask | NSClosableWindowMask | NSMiniaturizableWindowMask | NSTitledWindowMask);
 585         QNSWindow *window;
 586         window  = [[QNSWindow alloc] initWithContentRect:frame
 587                                          styleMask: styleMask
 588                                          backing:NSBackingStoreBuffered
 589                                          defer:NO]; // Deferring window creation breaks OpenGL (the GL context is set up
 590                                                     // before the window is shown and needs a proper window.).
 591         window->m_cocoaPlatformWindow = this;
 592
 593 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
 594     if (QSysInfo::QSysInfo::MacintoshVersion >= QSysInfo::MV_10_7) {
 595         // All windows with the WindowMaximizeButtonHint set also get a full-screen button.
 596         if (flags & Qt::WindowMaximizeButtonHint)
 597             [window setCollectionBehavior:NSWindowCollectionBehaviorFullScreenPrimary];
 598     }
 599 #endif
 600
 601         createdWindow = window;
 602     }
 603
 604     [createdWindow setLevel:windowLevel];
 605
 606     return createdWindow;
 607 }
 608
 609 void QCocoaWindow::setNSWindow(NSWindow *window)
 610 {
 611     QNSWindowDelegate *delegate = [[QNSWindowDelegate alloc] initWithQCocoaWindow:this];
 612     [window setDelegate:delegate];
 613     [window setAcceptsMouseMovedEvents:YES];
 614
 615     // Prevent Cocoa from releasing the window on close. Qt
 616     // handles the close event asynchronously and we want to
 617     // make sure that m_nsWindow stays valid until the
 618     // QCocoaWindow is deleted by Qt.
 619     [window setReleasedWhenClosed : NO];
 620
 621
 622     [[NSNotificationCenter defaultCenter] addObserver:m_contentView
 623                                           selector:@selector(windowNotification:)
 624                                           name:nil // Get all notifications
 625                                           object:m_nsWindow];
 626
 627     // ### Accept touch events by default.
 628     // Beware that enabling touch events has a negative impact on the overall performance.
 629     // We probably need a QWindowSystemInterface API to enable/disable touch events.
 630     [m_contentView setAcceptsTouchEvents:YES];
 631
 632     [window setContentView:m_contentView];
 633 }
 634
 635 void QCocoaWindow::clearNSWindow(NSWindow *window)
 636 {
 637     [window setDelegate:nil];
 638     [window clearPlatformWindow];
 639     [[NSNotificationCenter defaultCenter] removeObserver:m_contentView];
 640 }
 641
 642 // Returns the current global screen geometry for the nswindow associated with this window.
 643 QRect QCocoaWindow::windowGeometry() const
 644 {
 645     if (!m_nsWindow)
 646         return geometry();
 647
 648     NSRect rect = [m_nsWindow frame];
 649     QPlatformScreen *onScreen = QPlatformScreen::platformScreenForWindow(window());
 650     int flippedY = onScreen->geometry().height() - rect.origin.y - rect.size.height;  // account for nswindow inverted y.
 651     QRect qRect = QRect(rect.origin.x, flippedY, rect.size.width, rect.size.height);
 652     return qRect;
 653 }
 654
 655 // Returns a pointer to the parent QCocoaWindow for this window, or 0 if there is none.
 656 QCocoaWindow *QCocoaWindow::parentCocoaWindow() const
 657 {
 658     if (window() && window()->transientParent()) {
 659         return static_cast<QCocoaWindow*>(window()->transientParent()->handle());
 660     }
 661     return 0;
 662 }
 663
 664 // Syncs the NSWindow minimize/maximize/fullscreen state with the current QWindow state
 665 void QCocoaWindow::syncWindowState(Qt::WindowState newState)
 666 {
 667     if (!m_nsWindow)
 668         return;
 669
 670     if ((m_synchedWindowState & Qt::WindowMaximized) != (newState & Qt::WindowMaximized)) {
 671         [m_nsWindow performZoom : m_nsWindow]; // toggles
 672     }
 673
 674     if ((m_synchedWindowState & Qt::WindowMinimized) != (newState & Qt::WindowMinimized)) {
 675         if (newState & Qt::WindowMinimized) {
 676             [m_nsWindow performMiniaturize : m_nsWindow];
 677         } else {
 678             [m_nsWindow deminiaturize : m_nsWindow];
 679         }
 680     }
 681
 682     if ((m_synchedWindowState & Qt::WindowFullScreen) != (newState & Qt::WindowFullScreen)) {
 683 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
 684         if (QSysInfo::QSysInfo::MacintoshVersion >= QSysInfo::MV_10_7) {
 685             [m_nsWindow toggleFullScreen : m_nsWindow];
 686         } else {
 687             // TODO: "normal" fullscreen
 688         }
 689 #endif
 690     }
 691
 692     // New state is now the current synched state
 693     m_synchedWindowState = newState;
 694 }
 695
 696 bool QCocoaWindow::setWindowModified(bool modified)
 697 {
 698     if (!m_nsWindow)
 699         return false;
 700     [m_nsWindow setDocumentEdited:(modified?YES:NO)];
 701     return true;
 702 }
 703
 704 void QCocoaWindow::setMenubar(QCocoaMenuBar *mb)
 705 {
 706     m_menubar = mb;
 707 }
 708
 709 QCocoaMenuBar *QCocoaWindow::menubar() const
 710 {
 711     return m_menubar;
 712 }
 713
 714 QMargins QCocoaWindow::frameMargins() const
 715 {
 716     NSRect frameW = [m_nsWindow frame];
 717     NSRect frameC = [m_nsWindow contentRectForFrameRect:frameW];
 718
 719     return QMargins(frameW.origin.x - frameC.origin.x,
 720         (frameW.origin.y + frameW.size.height) - (frameC.origin.y + frameC.size.height),
 721         (frameW.origin.x + frameW.size.width) - (frameC.origin.x + frameC.size.width),
 722         frameC.origin.y - frameW.origin.y);
 723 }
 724
 725 void QCocoaWindow::setFrameStrutEventsEnabled(bool enabled)
 726 {
 727     m_frameStrutEventsEnabled = enabled;
 728 }