Fixed QT_NO_DRAGANDDROP build for the windows plugin

Change-Id: Ieb987105bdcc08118a1b83cf3b74a93fa402264a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

src/plugins/platforms/windows/qwindowsintegration.cpp

@@ -59,8 +59,10 @@
 #include "qwindowsguieventdispatcher.h"
 #ifndef QT_NO_CLIPBOARD
 #  include "qwindowsclipboard.h"
+#  ifndef QT_NO_DRAGANDDROP
+#    include "qwindowsdrag.h"
+#  endif
 #endif
-#include "qwindowsdrag.h"
 #include "qwindowsinputcontext.h"
 #include "qwindowskeymapper.h"
 #  ifndef QT_NO_ACCESSIBILITY
@@ -266,8 +268,10 @@ struct QWindowsIntegrationPrivate
     QWindowsNativeInterface m_nativeInterface;
 #ifndef QT_NO_CLIPBOARD
     QWindowsClipboard m_clipboard;
-#endif
+#  ifndef QT_NO_DRAGANDDROP
     QWindowsDrag m_drag;
+#  endif
+#endif
     QWindowsGuiEventDispatcher *m_eventDispatcher;
 #if defined(QT_OPENGL_ES_2)
     QEGLStaticContextPtr m_staticEGLContext;
@@ -529,12 +533,13 @@ QPlatformClipboard * QWindowsIntegration::clipboard() const
 {
     return &d->m_clipboard;
 }
-#endif // !QT_NO_CLIPBOARD
-
+#  ifndef QT_NO_DRAGANDDROP
 QPlatformDrag *QWindowsIntegration::drag() const
 {
     return &d->m_drag;
 }
+#  endif // !QT_NO_DRAGANDDROP
+#endif // !QT_NO_CLIPBOARD
 
 QPlatformInputContext * QWindowsIntegration::inputContext() const
 {

src/plugins/platforms/windows/qwindowsintegration.h

@@ -75,8 +75,10 @@ public:
     virtual QAbstractEventDispatcher *guiThreadEventDispatcher() const;
 #ifndef QT_NO_CLIPBOARD
     virtual QPlatformClipboard *clipboard() const;
-#endif
+#  ifndef QT_NO_DRAGANDDROP
     virtual QPlatformDrag *drag() const;
+#  endif
+#endif !QT_NO_CLIPBOARD
     virtual QPlatformInputContext *inputContext() const;
 #ifndef QT_NO_ACCESSIBILITY
     virtual QPlatformAccessibility *accessibility() const;

src/plugins/platforms/windows/qwindowswindow.cpp

@@ -815,21 +815,29 @@ void QWindowsWindow::destroyWindow()
 
 void QWindowsWindow::registerDropSite()
 {
+#ifndef QT_NO_CLIPBOARD
+#  ifndef QT_NO_DRAGANDDROP
     if (m_data.hwnd && !m_dropTarget) {
         m_dropTarget = new QWindowsOleDropTarget(window());
         RegisterDragDrop(m_data.hwnd, m_dropTarget);
         CoLockObjectExternal(m_dropTarget, true, true);
     }
+#  endif // !QT_NO_DRAGANDDROP
+#endif // !QT_NO_CLIPBOARD
 }
 
 void QWindowsWindow::unregisterDropSite()
 {
+#ifndef QT_NO_CLIPBOARD
+#  ifndef QT_NO_DRAGANDDROP
     if (m_data.hwnd && m_dropTarget) {
         m_dropTarget->Release();
         CoLockObjectExternal(m_dropTarget, false, true);
         RevokeDragDrop(m_data.hwnd);
         m_dropTarget = 0;
     }
+#  endif // !QT_NO_DRAGANDDROP
+#endif // !QT_NO_CLIPBOARD
 }
 
 // Returns topmost QWindowsWindow ancestor even if there are embedded windows in the chain.

src/plugins/platforms/windows/windows.pro

@@ -45,7 +45,6 @@ SOURCES += \
     qwindowsguieventdispatcher.cpp \
     qwindowsole.cpp \
     qwindowsmime.cpp \
-    qwindowsdrag.cpp \
     qwindowsinternalmimedata.cpp \
     qwindowscursor.cpp \
     qwindowsinputcontext.cpp \
@@ -69,7 +68,6 @@ HEADERS += \
     qtwindows_additional.h \
     qwindowsole.h \
     qwindowsmime.h \
-    qwindowsdrag.h \
     qwindowsinternalmimedata.h \
     qwindowscursor.h \
     array.h \
@@ -94,6 +92,16 @@ contains(QT_CONFIG, opengles2) {
     HEADERS += qwindowsclipboard.h
 }
 
+# drag and drop on windows only works if a clipboard is available
+!contains( DEFINES, QT_NO_DRAGANDDROP ) {
+    !win32:SOURCES += qwindowsdrag.cpp
+    !win32:HEADERS += qwindowsdrag.h
+    win32:!contains( DEFINES, QT_NO_CLIPBOARD ) {
+        HEADERS += qwindowsdrag.h
+        SOURCES += qwindowsdrag.cpp
+    }
+}
+
 # Enable access to HB_Face in harfbuzz includes included by qfontengine_p.h.
 DEFINES *= QT_COMPILES_IN_HARFBUZZ