Make thumbbuttons optional

Thumbbuttons are a feature that is not
    supported by older MINGW libraries.
    So check if the feature is available before
    using it.

src/CMakeLists.win32.cmake

@@ -7,6 +7,16 @@ ADD_DEFINITIONS( -DUNICODE )
 
 SET( QXTWEB_LIBRARIES  qxtweb-standalone )
 
+# Check for the availability of the Thumbbutton
+
+check_cxx_source_compiles( "
+     #include <shobjidl.h>
+     int main() {
+         THUMBBUTTON foo;
+         return 0;
+     }
+     "
+     HAVE_THUMBBUTTON )
 
 SET( OS_SPECIFIC_LINK_LIBRARIES
     ${OS_SPECIFIC_LINK_LIBRARIES}

src/Config.h.in

@@ -16,6 +16,7 @@
 #cmakedefine SNOW_LEOPARD
 #cmakedefine LEOPARD
 #cmakedefine HAVE_SPARKLE
+#cmakedefine HAVE_THUMBBUTTON
 
 #cmakedefine WITH_BREAKPAD
 #cmakedefine WITH_CRASHREPORTER

src/TomahawkWindow.cpp

@@ -92,7 +92,9 @@ TomahawkWindow::TomahawkWindow( QWidget* parent )
     : QMainWindow( parent )
 #ifdef Q_OS_WIN
     , m_buttonCreatedID( RegisterWindowMessage( L"TaskbarButtonCreated" ) )
+# ifdef HAVE_THUMBBUTTON
     , m_taskbarList(0)
+# endif
 #endif
     , ui( new Ui::TomahawkWindow )
     , m_searchWidget( 0 )
@@ -426,6 +428,7 @@ TomahawkWindow::setupUpdateCheck()
 bool
 TomahawkWindow::setupWindowsButtons()
 {
+#ifdef HAVE_THUMBBUTTON
     const GUID IID_ITaskbarList3 = { 0xea1afb91,0x9e28,0x4b86, { 0x90,0xe9,0x9e,0x9f,0x8a,0x5e,0xef,0xaf } };
     HRESULT hr = S_OK;
 
@@ -483,6 +486,9 @@ TomahawkWindow::setupWindowsButtons()
     }
 
     return SUCCEEDED( hr );
+#else // HAVE_THUMBBUTTON
+    return false;
+#endif
 }
 #endif
 
@@ -714,6 +720,7 @@ TomahawkWindow::winEvent( MSG* msg, long* result )
 void
 TomahawkWindow::audioStateChanged( AudioState newState, AudioState oldState )
 {
+#ifdef HAVE_THUMBBUTTON
     if ( m_taskbarList == 0 )
         return;
 
@@ -758,11 +765,13 @@ TomahawkWindow::audioStateChanged( AudioState newState, AudioState oldState )
     }
 
     m_taskbarList->ThumbBarUpdateButtons( winId(), ARRAYSIZE( m_thumbButtons ), m_thumbButtons );
+#endif // HAVE_THUMBBUTTON
 }
 
 void
 TomahawkWindow::updateWindowsLoveButton()
 {
+#ifdef HAVE_THUMBBUTTON
     if ( !AudioEngine::instance()->currentTrack().isNull() && AudioEngine::instance()->currentTrack()->toQuery()->loved() )
     {
         QPixmap loved( RESPATH "images/loved.png" );
@@ -777,6 +786,7 @@ TomahawkWindow::updateWindowsLoveButton()
     }
     m_thumbButtons[TP_LOVE].dwFlags = THBF_ENABLED;
     m_taskbarList->ThumbBarUpdateButtons( winId(), ARRAYSIZE( m_thumbButtons ), m_thumbButtons );
+#endif // HAVE_THUMBBUTTON
 }
 
 #endif

src/TomahawkWindow.h

@@ -167,8 +167,10 @@ private:
 #ifdef Q_OS_WIN
     bool setupWindowsButtons();
     const unsigned int m_buttonCreatedID;
+# ifdef HAVE_THUMBBUTTON
     ITaskbarList3 *m_taskbarList;
     THUMBBUTTON m_thumbButtons[5];
+# endif
     enum TB_STATES{ TP_PREVIOUS = 0,TP_PLAY_PAUSE = 1,TP_NEXT = 2,TP_LOVE = 4 };
 #endif