Hide dock and menubar on OSX;

Due to QWidget::showFullScreen having side-effects on OSX (setting the
dock and menubar to autohide, making it impossible to then set them as
hidden), the calls to that method were replaced with
UBPlatformUtils::showFullScreen(QWidget *). This function then calls
QWidget::showMaximized() on OSX, or QWidget::showFullScreen() on Linux
and Windows.

It is currently still impossible to switch smoothly between showing or
hiding the dock on OSX; current behaviour is to hide it all the time,
even in desktop mode.

src/core/UBDisplayManager.cpp

@@ -158,7 +158,7 @@ void UBDisplayManager::setDisplayWidget(QWidget* pDisplayWidget)
         mDisplayWidget = pDisplayWidget;
         mDisplayWidget->setGeometry(mDesktop->screenGeometry(mDisplayScreenIndex));
         if (UBSettings::settings()->appUseMultiscreen->get().toBool())
-            mDisplayWidget->showFullScreen();
+            UBPlatformUtils::showFullScreen(mDisplayWidget);
     }
 }
 
@@ -209,14 +209,14 @@ void UBDisplayManager::positionScreens()
     {
         mControlWidget->hide();
         mControlWidget->setGeometry(mDesktop->screenGeometry(mControlScreenIndex));
-        mControlWidget->showFullScreen();
+        UBPlatformUtils::showFullScreen(mControlWidget);
     }
 
     if (mDisplayWidget && mDisplayScreenIndex > -1)
     {
         mDisplayWidget->hide();
         mDisplayWidget->setGeometry(mDesktop->screenGeometry(mDisplayScreenIndex));
-        mDisplayWidget->showFullScreen();
+        UBPlatformUtils::showFullScreen(mDisplayWidget);
     }
     else if(mDisplayWidget)
     {
@@ -234,7 +234,7 @@ void UBDisplayManager::positionScreens()
         {
             QWidget* previous = mPreviousDisplayWidgets.at(psi);
             previous->setGeometry(mDesktop->screenGeometry(mPreviousScreenIndexes.at(psi)));
-            previous->showFullScreen();
+            UBPlatformUtils::showFullScreen(previous);
         }
     }
 
@@ -280,7 +280,7 @@ void UBDisplayManager::blackout()
 
     foreach(UBBlackoutWidget *blackoutWidget, mBlackoutWidgets)
     {
-        blackoutWidget->showFullScreen();
+        UBPlatformUtils::showFullScreen(blackoutWidget);
     }
 }
 

src/desktop/UBCustomCaptureWindow.cpp

@@ -30,6 +30,7 @@
 
 #include "UBCustomCaptureWindow.h"
 
+#include "frameworks/UBPlatformUtils.h"
 #include "gui/UBRubberBand.h"
 
 #include "core/memcheck.h"
@@ -74,7 +75,7 @@ int UBCustomCaptureWindow::execute(const QPixmap &pScreenPixmap)
     int currentScreen = desktop->screenNumber(QCursor::pos());
     setGeometry(desktop->screenGeometry(currentScreen));
 
-    showFullScreen();
+    UBPlatformUtils::showFullScreen(this);
     setWindowOpacity(1.0);
 
     return exec();

src/desktop/UBDesktopAnnotationController.cpp

@@ -332,7 +332,7 @@ void UBDesktopAnnotationController::showWindow()
     UBDrawingController::drawingController()->setStylusTool(mDesktopStylusTool);
 
 #ifndef Q_OS_LINUX
-    mTransparentDrawingView->showFullScreen();
+    UBPlatformUtils::showFullScreen(mTransparentDrawingView);
 #else
     // this is necessary to avoid unity to hide the panels
     mTransparentDrawingView->show();

src/frameworks/UBPlatformUtils.h

@@ -204,6 +204,7 @@ public:
         static QString urlFromClipboard();
         static QStringList availableTranslations();
         static void setFrontProcess();
+        static void showFullScreen(QWidget * pWidget);
 
 #ifdef Q_OS_OSX
         static void SetMacLocaleByIdentifier(const QString& id);

src/frameworks/UBPlatformUtils_linux.cpp

@@ -429,7 +429,14 @@ QString UBPlatformUtils::urlFromClipboard()
     return qsRet;
 }
 
-
 void UBPlatformUtils::setFrontProcess()
 {
+    // not used in Linux
+}
+
+
+void UBPlatformUtils::showFullScreen(QWidget *pWidget)
+{
+    pWidget->showFullScreen();
 }
+

src/frameworks/UBPlatformUtils_mac.mm

@@ -65,7 +65,7 @@ void UBPlatformUtils::init()
 
     //originalSetSystemUIMode = APEPatchCreate((const void *)SetSystemUIMode, (const void *)emptySetSystemUIMode);
 
-    setDesktopMode(false);
+    //setDesktopMode(false);
 
     NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
 
@@ -93,20 +93,24 @@ void UBPlatformUtils::init()
 
 
 void UBPlatformUtils::setDesktopMode(bool desktop)
-{ /*
-#ifndef OS_NEWER_THAN_OR_EQUAL_TO_1010
-    //OSStatus (*functor)(SystemUIMode, SystemUIOptions) = (OSStatus (*)(SystemUIMode, SystemUIOptions))originalSetSystemUIMode;
+{
 
-    if (desktop)
-    {
-        functor(kUIModeNormal, 0);
+    //qDebug() << "setDesktopMode called. desktop = " << desktop;
+
+    @try {
+        // temporarily disabled due to bug: when switching to desktop mode (and calling this),
+        // openboard switches right back to the board mode. clicking again on desktop mode works.
+        /*if (desktop) {
+            [NSApp setPresentationOptions:NSApplicationPresentationAutoHideMenuBar | NSApplicationPresentationAutoHideDock];
+        }
+        else*/
+            [NSApp setPresentationOptions:NSApplicationPresentationHideMenuBar | NSApplicationPresentationHideDock];
     }
-    else
-    {
-        functor(kUIModeAllHidden, 0);
+
+    @catch(NSException * exception) {
+        qDebug() << "Error setting presentation options";
     }
-#endif
-*/
+
 }
 
 
@@ -574,6 +578,23 @@ void UBPlatformUtils::setFrontProcess()
     // activate the application, forcing focus on it
     [app activateWithOptions: NSApplicationActivateIgnoringOtherApps];
 
-    // other option:NSApplicationActivateAllWindows. This won't steal focus from another app, e.g
+    // other option: NSApplicationActivateAllWindows. This won't steal focus from another app, e.g
     // if the user is doing something else while waiting for OpenBoard to load
 }
+
+
+/**
+ * @brief Full-screen a QWidget. Specific behaviour is platform-dependent.
+ * @param pWidget the QWidget to maximize
+ */
+void UBPlatformUtils::showFullScreen(QWidget *pWidget)
+{
+    pWidget->showMaximized();
+
+    /* On OS X, we want to hide the Dock and menu bar (aka "kiosk mode"). Qt's default behaviour
+     * when full-screening a QWidget is to set the dock and menu bar to auto-hide.
+     * Since it is impossible to later set different presentation options (i.e Hide dock & menu bar)
+     * to NSApplication, we have to avoid calling QWidget::showFullScreen on OSX.
+    */
+}
+

src/frameworks/UBPlatformUtils_win.cpp

@@ -427,4 +427,11 @@ QString UBPlatformUtils::urlFromClipboard()
 
 void UBPlatformUtils::setFrontProcess()
 {
+    // not used in Windows
+}
+
+
+void UBPlatformUtils::showFullScreen(QWidget *pWidget)
+{
+    pWidget->showFullScreen();
 }