don't try to paint hidden windows

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41068 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/dfb/toplevel.cpp

@@ -50,7 +50,30 @@ struct wxDfbPaintRequest
     bool   m_eraseBackground;
 };
 
-WX_DEFINE_ARRAY_PTR(wxDfbPaintRequest*, wxDfbQueuedPaintRequests);
+WX_DEFINE_ARRAY_PTR(wxDfbPaintRequest*, wxDfbQueuedPaintRequestsList);
+
+// Queue of paint requests
+class wxDfbQueuedPaintRequests
+{
+public:
+    ~wxDfbQueuedPaintRequests() { Clear(); }
+
+    // Adds paint request to the queue
+    void Add(const wxRect& rect, bool eraseBack)
+        { m_queue.push_back(new wxDfbPaintRequest(rect, eraseBack)); }
+
+    // Is the queue empty?
+    bool IsEmpty() const { return m_queue.empty(); }
+
+    // Empties the queue
+    void Clear() { WX_CLEAR_ARRAY(m_queue); }
+
+    // Gets requests in the queue
+    const wxDfbQueuedPaintRequestsList& GetRequests() const { return m_queue; }
+
+private:
+    wxDfbQueuedPaintRequestsList m_queue;
+};
 
 // ============================================================================
 // wxTopLevelWindowDFB
@@ -159,7 +182,6 @@ wxTopLevelWindowDFB::~wxTopLevelWindowDFB()
         wxTheApp->ExitMainLoop();
     }
 
-    WX_CLEAR_ARRAY(*m_toPaint);
     wxDELETE(m_toPaint);
 
     // remove the TLW from DFBWindowID->wxTLW map:
@@ -335,18 +357,28 @@ wxIDirectFBSurfacePtr wxTopLevelWindowDFB::ObtainDfbSurface() const
 
 void wxTopLevelWindowDFB::HandleQueuedPaintRequests()
 {
-    wxDfbQueuedPaintRequests& toPaint = *m_toPaint;
-    if ( toPaint.empty() )
+    if ( m_toPaint->IsEmpty() )
         return; // nothing to do
 
+    if ( IsFrozen() || !IsShown() )
+    {
+        // nothing to do if the window is frozen or hidden; clear the queue
+        // and return (note that it's OK to clear the queue even if the window
+        // is frozen, because Thaw() calls Refresh()):
+        m_toPaint->Clear();
+        return;
+    }
+
+    const wxDfbQueuedPaintRequestsList& requests = m_toPaint->GetRequests();
+
     // process queued paint requests:
     wxRect winRect(wxPoint(0, 0), GetSize());
     wxRect paintedRect;
 
-    size_t cnt = toPaint.size();
+    size_t cnt = requests.size();
     for ( size_t i = 0; i < cnt; ++i )
     {
-        const wxDfbPaintRequest& request = *toPaint[i];
+        const wxDfbPaintRequest& request = *requests[i];
 
         wxRect clipped(request.m_rect);
 
@@ -368,7 +400,7 @@ void wxTopLevelWindowDFB::HandleQueuedPaintRequests()
             paintedRect.Union(clipped);
     }
 
-    WX_CLEAR_ARRAY(toPaint);
+    m_toPaint->Clear();
 
     if ( paintedRect.IsEmpty() )
         return; // no painting occurred, no need to flip
@@ -383,8 +415,8 @@ void wxTopLevelWindowDFB::HandleQueuedPaintRequests()
 
 void wxTopLevelWindowDFB::DoRefreshRect(const wxRect& rect, bool eraseBack)
 {
-    // defer paiting until idle time or until Update() is called:
-    m_toPaint->push_back(new wxDfbPaintRequest(rect, eraseBack));
+    // defer painting until idle time or until Update() is called:
+    m_toPaint->Add(rect, eraseBack);
 }
 
 void wxTopLevelWindowDFB::Update()

src/dfb/window.cpp

@@ -646,11 +646,10 @@ void wxWindowDFB::Thaw()
 
 void wxWindowDFB::PaintWindow(const wxRect& rect, bool eraseBackground)
 {
-    if ( IsFrozen() )
-        return; // don't paint anything if the window is frozen
+    wxCHECK_RET( !IsFrozen() && IsShown(), _T("shouldn't be called") );
 
     wxLogTrace(TRACE_PAINT,
-               _T("%p ('%s'): paiting region [x=%i,y=%i,w=%i,h=%i]"),
+               _T("%p ('%s'): painting region [x=%i,y=%i,w=%i,h=%i]"),
                this, GetName().c_str(),
                rect.x, rect.y, rect.width, rect.height);
 
@@ -694,6 +693,9 @@ void wxWindowDFB::PaintWindow(const wxRect& rect, bool eraseBackground)
     {
         wxWindow *child = *i;
 
+        if ( child->IsFrozen() || !child->IsShown() )
+            continue; // don't paint anything if the window is frozen or hidden
+
         // compute child's area to repaint
         wxRect childrect(child->GetRect());
         childrect.Offset(origin);