Cocoa: Add setNSToolbar(QWindow *, NSToolBar *)

Calling this function associates the given native
toolbar with the QWindow. QWindow will then set
it on the native NSWindow at the appropriate time
during window creation.

Change-Id: I2a50f79b2a0453cc739f8d68e965e37b95998083
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>

src/plugins/platforms/cocoa/qcocoaintegration.h

@@ -134,6 +134,9 @@ public:
     void updateScreens();
     QCocoaScreen *screenAtIndex(int index);
 
+    void setToolbar(QWindow *window, NSToolbar *toolbar);
+    NSToolbar *toolbar(QWindow *window) const;
+    void clearToolbars();
 private:
     static QCocoaIntegration *mInstance;
 
@@ -150,6 +153,8 @@ private:
     QScopedPointer<QCocoaNativeInterface> mNativeInterface;
     QScopedPointer<QCocoaServices> mServices;
     QScopedPointer<QCocoaKeyMapper> mKeyboardMapper;
+
+    QHash<QWindow *, NSToolbar *> mToolbars;
 };
 
 QT_END_NAMESPACE

src/plugins/platforms/cocoa/qcocoaintegration.mm

@@ -301,6 +301,8 @@ QCocoaIntegration::~QCocoaIntegration()
     while (!mScreens.isEmpty()) {
         delete mScreens.takeLast();
     }
+
+    clearToolbars();
 }
 
 QCocoaIntegration *QCocoaIntegration::instance()
@@ -466,4 +468,27 @@ QList<int> QCocoaIntegration::possibleKeys(const QKeyEvent *event) const
     return mKeyboardMapper->possibleKeys(event);
 }
 
+void QCocoaIntegration::setToolbar(QWindow *window, NSToolbar *toolbar)
+{
+    if (NSToolbar *prevToolbar = mToolbars.value(window))
+        [prevToolbar release];
+
+    [toolbar retain];
+    mToolbars.insert(window, toolbar);
+}
+
+NSToolbar *QCocoaIntegration::toolbar(QWindow *window) const
+{
+    return mToolbars.value(window);
+}
+
+void QCocoaIntegration::clearToolbars()
+{
+    QHash<QWindow *, NSToolbar *>::const_iterator it = mToolbars.constBegin();
+    while (it != mToolbars.constEnd()) {
+        [it.value() release];
+    }
+    mToolbars.clear();
+}
+
 QT_END_NAMESPACE

src/plugins/platforms/cocoa/qcocoanativeinterface.h

@@ -135,6 +135,11 @@ private:
 
     // Request a unified title and toolbar look for the window.
     static void setContentBorderThickness(QWindow *window, int topThickness, int bottomThickness);
+
+    // Sets a NSToolbar instance for the given QWindow. The
+    // toolbar will be attached to the native NSWindow when
+    // that is created;
+   static void setNSToolbar(QWindow *window, void *nsToolbar);
 };
 
 QT_END_NAMESPACE

src/plugins/platforms/cocoa/qcocoanativeinterface.mm

@@ -47,6 +47,7 @@
 #include "qmacmime.h"
 #include "qcocoahelpers.h"
 #include "qcocoaapplication.h"
+#include "qcocoaintegration.h"
 
 #include <qbytearray.h>
 #include <qwindow.h>
@@ -125,6 +126,8 @@ QPlatformNativeInterface::NativeResourceForIntegrationFunction QCocoaNativeInter
         return NativeResourceForIntegrationFunction(QCocoaNativeInterface::setEmbeddedInForeignView);
     if (resource.toLower() == "setcontentborderthickness")
         return NativeResourceForIntegrationFunction(QCocoaNativeInterface::setContentBorderThickness);
+    if (resource.toLower() == "setnstoolbar")
+        return NativeResourceForIntegrationFunction(QCocoaNativeInterface::setNSToolbar);
 
     return 0;
 }
@@ -285,4 +288,16 @@ void QCocoaNativeInterface::setContentBorderThickness(QWindow *window, int topTh
         cocoaWindow->setContentBorderThickness(topThickness, bottomThickness);
 }
 
+void QCocoaNativeInterface::setNSToolbar(QWindow *window, void *nsToolbar)
+{
+    if (!window)
+        return;
+
+    QCocoaIntegration::instance()->setToolbar(window, static_cast<NSToolbar *>(nsToolbar));
+
+    QCocoaWindow *cocoaWindow = static_cast<QCocoaWindow *>(window->handle());
+    if (cocoaWindow)
+        cocoaWindow->updateNSToolbar();
+}
+
 QT_END_NAMESPACE

src/plugins/platforms/cocoa/qcocoawindow.h

@@ -164,6 +164,7 @@ public:
     void registerTouch(bool enable);
     void setContentBorderThickness(int topThickness, int bottomThickness);
     void applyContentBorderThickness(NSWindow *window);
+    void updateNSToolbar();
 
     qreal devicePixelRatio() const;
     bool isWindowExposable();

src/plugins/platforms/cocoa/qcocoawindow.mm

@@ -45,6 +45,7 @@
 #include "qcocoaeventdispatcher.h"
 #include "qcocoaglcontext.h"
 #include "qcocoahelpers.h"
+#include "qcocoanativeinterface.h"
 #include "qnsview.h"
 #include <QtCore/qfileinfo.h>
 #include <QtCore/private/qcore_mac_p.h>
@@ -1124,6 +1125,11 @@ void QCocoaWindow::recreateWindow(const QPlatformWindow *parentWindow)
     const qreal opacity = qt_window_private(window())->opacity;
     if (!qFuzzyCompare(opacity, qreal(1.0)))
         setOpacity(opacity);
+
+    // top-level QWindows may have an attached NSToolBar, call
+    // update function which will attach to the NSWindow.
+    if (!parentWindow)
+        updateNSToolbar();
 }
 
 void QCocoaWindow::reinsertChildWindow(QCocoaWindow *child)
@@ -1387,6 +1393,19 @@ void QCocoaWindow::applyContentBorderThickness(NSWindow *window)
     }
 }
 
+void QCocoaWindow::updateNSToolbar()
+{
+    if (!m_nsWindow)
+        return;
+
+    NSToolbar *toolbar = QCocoaIntegration::instance()->toolbar(window());
+
+    if ([m_nsWindow toolbar] == toolbar)
+       return;
+
+    [m_nsWindow setToolbar: toolbar];
+    [m_nsWindow setShowsToolbarButton:YES];
+}
 
 qreal QCocoaWindow::devicePixelRatio() const
 {