+///////////////////////////////////////////////////////////////////////////////
+// Name: wx/generic/custombgwin.h
+// Purpose: Generic implementation of wxCustomBackgroundWindow.
+// Author: Vadim Zeitlin
+// Created: 2011-10-10
+// RCS-ID: $Id: wxhead.h,v 1.12 2010-04-22 12:44:51 zeitlin Exp $
+// 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_
projects / wxWidgets.git / commitdiff
