wxWidgets3: update to svn r70933

Externals/wxWidgets3/include/wx/generic/custombgwin.h

@@ -0,0 +1,96 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/generic/custombgwin.h
+// Purpose:     Generic implementation of wxCustomBackgroundWindow.
+// Author:      Vadim Zeitlin
+// Created:     2011-10-10
+// RCS-ID:      $Id: custombgwin.h 69378 2011-10-11 17:07:43Z VZ $
+// Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_GENERIC_CUSTOMBGWIN_H_
+#define _WX_GENERIC_CUSTOMBGWIN_H_
+
+#include "wx/bitmap.h"
+
+// A helper to avoid template bloat: this class contains all type-independent
+// code of wxCustomBackgroundWindow<> below.
+class wxCustomBackgroundWindowGenericBase : public wxCustomBackgroundWindowBase
+{
+public:
+    wxCustomBackgroundWindowGenericBase() { }
+
+protected:
+    void DoEraseBackground(wxEraseEvent& event, wxWindow* win)
+    {
+        wxDC& dc = *event.GetDC();
+
+        const wxSize clientSize = win->GetClientSize();
+        const wxSize bitmapSize = m_bitmapBg.GetSize();
+
+        for ( int x = 0; x < clientSize.x; x += bitmapSize.x )
+        {
+            for ( int y = 0; y < clientSize.y; y += bitmapSize.y )
+            {
+                dc.DrawBitmap(m_bitmapBg, x, y);
+            }
+        }
+    }
+
+
+    // The bitmap used for painting the background if valid.
+    wxBitmap m_bitmapBg;
+
+
+    wxDECLARE_NO_COPY_CLASS(wxCustomBackgroundWindowGenericBase);
+};
+
+// ----------------------------------------------------------------------------
+// wxCustomBackgroundWindow
+// ----------------------------------------------------------------------------
+
+template <class W>
+class wxCustomBackgroundWindow : public W,
+                                 public wxCustomBackgroundWindowGenericBase
+{
+public:
+    typedef W BaseWindowClass;
+
+    wxCustomBackgroundWindow() { }
+
+protected:
+    virtual void DoSetBackgroundBitmap(const wxBitmap& bmp)
+    {
+        m_bitmapBg = bmp;
+
+        if ( m_bitmapBg.IsOk() )
+        {
+            BaseWindowClass::Connect
+            (
+                wxEVT_ERASE_BACKGROUND,
+                wxEraseEventHandler(wxCustomBackgroundWindow::OnEraseBackground)
+            );
+        }
+        else
+        {
+            BaseWindowClass::Disconnect
+            (
+                wxEVT_ERASE_BACKGROUND,
+                wxEraseEventHandler(wxCustomBackgroundWindow::OnEraseBackground)
+            );
+        }
+    }
+
+private:
+    // Event handler for erasing the background which is only used when we have
+    // a valid background bitmap.
+    void OnEraseBackground(wxEraseEvent& event)
+    {
+        DoEraseBackground(event, this);
+    }
+
+
+    wxDECLARE_NO_COPY_TEMPLATE_CLASS(wxCustomBackgroundWindow, W);
+};
+
+#endif // _WX_GENERIC_CUSTOMBGWIN_H_