* x11_display.cpp: create a dummy "parent" window for the task bar

  * x11_window.cpp: use XSetTransientForHint() to associate the windows
  to the "parent" window -> single window in the task bar

modules/gui/skins2/x11/x11_display.cpp

@@ -33,7 +33,7 @@
 
 
 X11Display::X11Display( intf_thread_t *pIntf ): SkinObject( pIntf ),
-    m_gc( NULL ), m_colormap( 0 )
+    m_mainWindow( 0 ), m_gc( NULL ), m_colormap( 0 )
 {
     // Open a connection to the X Server
     m_pDisplay = XOpenDisplay( NULL );
@@ -181,11 +181,46 @@ X11Display::X11Display( intf_thread_t *pIntf ): SkinObject( pIntf ),
         m_gc = XCreateGC( m_pDisplay, DefaultRootWindow( m_pDisplay ),
                           GCGraphicsExposures, &xgcvalues );
     }
+
+    // Create a parent window to have a single task in the task bar
+    XSetWindowAttributes attr;
+    m_mainWindow = XCreateWindow( m_pDisplay, DefaultRootWindow( m_pDisplay),
+                                  0, 0, 1, 1, 0, 0, InputOutput,
+                                  CopyFromParent, 0, &attr );
+
+    // Changing decorations
+    struct {
+        unsigned long flags;
+        unsigned long functions;
+        unsigned long decorations;
+        long input_mode;
+        unsigned long status;
+    } motifWmHints;
+    Atom hints_atom = XInternAtom( m_pDisplay, "_MOTIF_WM_HINTS", False );
+    motifWmHints.flags = 2;    // MWM_HINTS_DECORATIONS;
+    motifWmHints.decorations = 0;
+    XChangeProperty( m_pDisplay, m_mainWindow, hints_atom, hints_atom, 32,
+                     PropModeReplace, (unsigned char *)&motifWmHints,
+                     sizeof( motifWmHints ) / sizeof( long ) );
+
+    // Change the window title
+    XStoreName( m_pDisplay, m_mainWindow, "VLC Media Player" );
+
+    // Set an empty mask for the window
+    Region mask = XCreateRegion();
+    XShapeCombineRegion( m_pDisplay, m_mainWindow, ShapeBounding, 0, 0, mask,
+                         ShapeSet );
+    // Map the window
+    XMapWindow( m_pDisplay, m_mainWindow);
 }
 
 
 X11Display::~X11Display()
 {
+    if( m_mainWindow )
+    {
+        XDestroyWindow( m_pDisplay, m_mainWindow );
+    }
     if( m_gc )
     {
         XFreeGC( m_pDisplay, m_gc );

modules/gui/skins2/x11/x11_display.hpp

@@ -68,10 +68,15 @@ class X11Display: public SkinObject
         /// Get the pixel value corresponding to the given colors
         unsigned long getPixelValue( uint8_t r, uint8_t g, uint8_t b ) const;
 
+        /// Get the main window ID
+        Window getMainWindow() const { return m_mainWindow; }
+
         //XXX
         Window m_voutWindow;
 
     private:
+        /// Dummy parent window for the task bar
+        Window m_mainWindow;
         /// Display parameters
         Display *m_pDisplay;
         Visual *m_pVisual;
@@ -82,7 +87,6 @@ class X11Display: public SkinObject
         int m_greenLeftShift, m_greenRightShift;
         int m_blueLeftShift, m_blueRightShift;
 
-
         /// Pointer on the right implementation of getPixel
         MakePixelFunc_t makePixelImpl;
 

modules/gui/skins2/x11/x11_window.cpp

@@ -101,9 +101,12 @@ X11Window::X11Window( intf_thread_t *pIntf, GenericWindow &rWindow,
         pFactory->m_dndMap[m_wnd] = m_pDropTarget;
     }
 
-    // Change the window title XXX
+    // Change the window title
     XStoreName( XDISPLAY, m_wnd, "VLC" );
 
+    // Associate the window to the main "parent" window
+    XSetTransientForHint( XDISPLAY, m_wnd, m_rDisplay.getMainWindow() );
+
     // XXX Kludge to tell VLC that this window is the vout
     if (pParentWindow)
     {