merged docvwmdi sample into docview one to avoid having 2 almost identical samples; and modernized and cleaned up the code in the process

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@56053 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/docview/view.h

@@ -1,49 +1,73 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        view.h
+// Name:        samples/docview/view.h
 // Purpose:     View classes
 // Author:      Julian Smart
-// Modified by:
+// Modified by: Vadim Zeitlin: merge with the MDI version and general cleanup
 // Created:     04/01/98
 // RCS-ID:      $Id$
-// Copyright:   (c) Julian Smart
+// Copyright:   (c) 1998 Julian Smart
+//              (c) 2008 Vadim Zeitlin
 // Licence:     wxWindows license
 /////////////////////////////////////////////////////////////////////////////
 
-#ifndef __VIEW_H__
-#define __VIEW_H__
+#ifndef _WX_SAMPLES_DOCVIEW_VIEW_H_
+#define _WX_SAMPLES_DOCVIEW_VIEW_H_
 
 #include "wx/docview.h"
 
-class DrawingView;
+// ----------------------------------------------------------------------------
+// Drawing view classes
+// ----------------------------------------------------------------------------
+
+// The window showing the drawing itself
 class MyCanvas : public wxScrolledWindow
 {
 public:
-    DrawingView* m_view;
+    // view may be NULL if we're not associated with one yet, but parent must
+    // be a valid pointer
+    MyCanvas(wxView *view, wxWindow *parent);
+    virtual ~MyCanvas();
 
-    MyCanvas(DrawingView*, wxFrame*, const wxPoint& pos, const wxSize& size, const long style);
     virtual void OnDraw(wxDC& dc);
 
-protected:
+    // in a normal multiple document application a canvas is associated with
+    // one view from the beginning until the end, but to support the single
+    // document mode in which all documents reuse the same MyApp::GetCanvas()
+    // we need to allow switching the canvas from one view to another one
+
+    void SetView(wxView *view)
+    {
+        wxASSERT_MSG( !m_view, "shouldn't be already associated with a view" );
+
+        m_view = view;
+    }
+
+    void ResetView()
+    {
+        wxASSERT_MSG( m_view, "should be associated with a view" );
+
+        m_view = NULL;
+    }
+
+private:
     void OnMouseEvent(wxMouseEvent& event);
+
+    wxView *m_view;
+
+    // the segment being currently drawn or NULL if none
+    DoodleSegment *m_currentSegment;
+
+    // the last mouse press position
+    wxPoint m_lastMousePos;
+
     DECLARE_EVENT_TABLE()
 };
 
-class MyTextWindow: public wxTextCtrl
-{
-public:
-    wxView* m_view;
-
-    MyTextWindow(wxView *v, wxFrame *frame, const wxPoint& pos, const wxSize& size, const long style);
-};
-
+// The view using MyCanvas to show its contents
 class DrawingView : public wxView
 {
 public:
-    wxFrame*  m_frame;
-    MyCanvas* m_canvas;
-
-    DrawingView() { m_canvas = NULL; m_frame = NULL; };
-    virtual ~DrawingView() {};
+    DrawingView() { m_canvas = NULL; m_frame = NULL; }
 
     virtual bool OnCreate(wxDocument *doc, long flags);
     virtual void OnDraw(wxDC *dc);
@@ -52,35 +76,42 @@ public:
 
     DrawingDocument* GetDocument();
 
-protected:
+private:
     void OnCut(wxCommandEvent& event);
 
-private:
+    wxFrame *m_frame;
+    MyCanvas *m_canvas;
+
     DECLARE_EVENT_TABLE()
     DECLARE_DYNAMIC_CLASS(DrawingView)
 };
 
+// ----------------------------------------------------------------------------
+// Text view classes
+// ----------------------------------------------------------------------------
+
+// The view using a standard wxTextCtrl to show its contents
 class TextEditView : public wxView
 {
 public:
-    wxFrame*      m_frame;
-    MyTextWindow* m_textsw;
-
-    TextEditView(): wxView() { m_frame = NULL; m_textsw = NULL; }
-    virtual ~TextEditView() {}
+    TextEditView() : wxView() { m_frame = NULL; m_text = NULL; }
 
     virtual bool OnCreate(wxDocument *doc, long flags);
     virtual void OnDraw(wxDC *dc);
-    virtual void OnUpdate(wxView *sender, wxObject *hint = NULL);
     virtual bool OnClose(bool deleteWindow = true);
 
+    wxTextCtrl *GetText() const { return m_text; }
+
 private:
-    void OnCopy(wxCommandEvent& WXUNUSED(event)) { m_textsw->Copy(); }
-    void OnPaste(wxCommandEvent& WXUNUSED(event)) { m_textsw->Paste(); }
-    void OnSelectAll(wxCommandEvent& WXUNUSED(event)) { m_textsw->SelectAll(); }
+    void OnCopy(wxCommandEvent& WXUNUSED(event)) { m_text->Copy(); }
+    void OnPaste(wxCommandEvent& WXUNUSED(event)) { m_text->Paste(); }
+    void OnSelectAll(wxCommandEvent& WXUNUSED(event)) { m_text->SelectAll(); }
+
+    wxFrame *m_frame;
+    wxTextCtrl *m_text;
 
     DECLARE_EVENT_TABLE()
     DECLARE_DYNAMIC_CLASS(TextEditView)
 };
 
-#endif
+#endif // _WX_SAMPLES_DOCVIEW_VIEW_H_