Initial commit.

sdk/wxshapeframework/src/CanvasState.cpp

@@ -0,0 +1,83 @@
+/***************************************************************
+ * Name:      CanvasState.cpp
+ * Purpose:   Implements container for stored canvas state
+ * Author:    Michal Bližňák (michal.bliznak@tiscali.cz)
+ * Created:   2007-07-22
+ * Copyright: Michal Bližňák
+ * License:   wxWidgets license (www.wxwidgets.org)
+ * Notes:
+ **************************************************************/
+
+#include "wx_pch.h"
+
+#ifdef _DEBUG_MSVC
+#define new DEBUG_NEW
+#endif
+
+#include <wx/mstream.h>
+
+#include "wx/wxsf/CanvasState.h"
+#include "wx/wxsf/ShapeCanvas.h"
+
+#include <wx/listimpl.cpp>
+
+WX_DEFINE_LIST(StateList);
+
+wxSFCanvasState::wxSFCanvasState(wxStreamBuffer *data)
+{
+	// copy content of stream buffer to local memory buffer
+	if(data)
+	{
+		data->ResetBuffer();
+		m_dataBuffer.AppendData(data->GetBufferStart(), data->GetDataLeft());
+		m_dataBuffer.AppendByte(0);
+	}
+
+	m_pDataManager = NULL;
+}
+
+wxSFCanvasState::wxSFCanvasState(wxSFDiagramManager *data)
+{
+	wxASSERT(data);
+
+	m_pDataManager = data;
+}
+
+wxSFCanvasState::~wxSFCanvasState(void)
+{
+	if( m_pDataManager)
+	{
+		delete m_pDataManager;
+	}
+}
+
+//----------------------------------------------------------------------------------//
+// Public functions
+//----------------------------------------------------------------------------------//
+
+void wxSFCanvasState::Restore(wxSFShapeCanvas* canvas)
+{
+    wxASSERT(canvas);
+    wxASSERT(canvas->GetDiagramManager());
+
+	if( m_pDataManager )
+	{
+		// copy content of stored temporal data manager into the currently used one
+		canvas->GetDiagramManager()->CopyItems(*m_pDataManager);
+		canvas->Refresh(false);
+	}
+	else
+	{
+		// create input stream from local memory buffer
+		wxMemoryInputStream instream(m_dataBuffer.GetData(), m_dataBuffer.GetDataLen()-1);
+
+		// deserialize canvas content
+		if(instream.IsOk() && canvas && canvas->GetDiagramManager())
+		{
+			// clear all previous canvas content
+			canvas->GetDiagramManager()->Clear();
+			canvas->GetDiagramManager()->DeserializeFromXml(instream);
+			canvas->Refresh(false);
+		}
+	}
+}