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/doc.h

@@ -1,107 +1,179 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        doc.h
+// Name:        samples/docview/doc.h
 // Purpose:     Document 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 __DOC_H__
-#define __DOC_H__
+#ifndef _WX_SAMPLES_DOCVIEW_DOC_H_
+#define _WX_SAMPLES_DOCVIEW_DOC_H_
 
 #include "wx/docview.h"
 #include "wx/cmdproc.h"
+#include "wx/vector.h"
 
-// Plots a line from one point to the other
-class DoodleLine : public wxObject
+// This sample is written to build both with wxUSE_STD_IOSTREAM==0 and 1, which
+// somewhat complicates its code but is necessary in order to support building
+// it under all platforms and in all build configurations
+//
+// In your own code you would normally use std::stream classes only and so
+// wouldn't need these typedefs
+#if wxUSE_STD_IOSTREAM
+    typedef wxSTD istream DocumentIstream;
+    typedef wxSTD ostream DocumentOstream;
+#else // !wxUSE_STD_IOSTREAM
+    typedef wxInputStream DocumentIstream;
+    typedef wxOutputStream DocumentOstream;
+#endif // wxUSE_STD_IOSTREAM/!wxUSE_STD_IOSTREAM
+
+// ----------------------------------------------------------------------------
+// The document class and its helpers
+// ----------------------------------------------------------------------------
+
+// Represents a line from one point to the other
+struct DoodleLine
 {
-public:
+    DoodleLine() { /* leave fields uninitialized */ }
+
+    DoodleLine(const wxPoint& pt1, const wxPoint& pt2)
+        : x1(pt1.x), y1(pt1.y), x2(pt2.x), y2(pt2.y)
+    {
+    }
+
     wxInt32 x1;
     wxInt32 y1;
     wxInt32 x2;
     wxInt32 y2;
 };
 
+typedef wxVector<DoodleLine> DoodleLines;
+
 // Contains a list of lines: represents a mouse-down doodle
-class DoodleSegment : public wxObject
+class DoodleSegment
 {
 public:
-    wxList m_lines;
+    DocumentOstream& SaveObject(DocumentOstream& stream);
+    DocumentIstream& LoadObject(DocumentIstream& stream);
 
-    DoodleSegment() : wxObject() {}
-    DoodleSegment(const DoodleSegment& seg);
-    virtual ~DoodleSegment();
-
-    void Draw(wxDC *dc);
-#if wxUSE_STD_IOSTREAM
-    wxSTD ostream& SaveObject(wxSTD ostream& text_stream);
-    wxSTD istream& LoadObject(wxSTD istream& text_stream);
-#else
-    wxOutputStream& SaveObject(wxOutputStream& stream);
-    wxInputStream& LoadObject(wxInputStream& stream);
-#endif
+    bool IsEmpty() const { return m_lines.empty(); }
+    void AddLine(const wxPoint& pt1, const wxPoint& pt2)
+    {
+        m_lines.push_back(DoodleLine(pt1, pt2));
+    }
+    const DoodleLines& GetLines() const { return m_lines; }
 
+private:
+    DoodleLines m_lines;
 };
 
+typedef wxVector<DoodleSegment> DoodleSegments;
+
+
+// The drawing document (model) class itself
 class DrawingDocument : public wxDocument
 {
-    DECLARE_DYNAMIC_CLASS(DrawingDocument)
-private:
 public:
-    wxList m_doodleSegments;
+    DrawingDocument() : wxDocument() { }
 
-    DrawingDocument() : wxDocument() {}
-    virtual ~DrawingDocument();
+    DocumentOstream& SaveObject(DocumentOstream& stream);
+    DocumentIstream& LoadObject(DocumentIstream& stream);
 
-#if wxUSE_STD_IOSTREAM
-    wxSTD ostream& SaveObject(wxSTD ostream& text_stream);
-    wxSTD istream& LoadObject(wxSTD istream& text_stream);
-#else
-    wxOutputStream& SaveObject(wxOutputStream& stream);
-    wxInputStream& LoadObject(wxInputStream& stream);
-#endif
+    // add a new segment to the document
+    void AddDoodleSegment(const DoodleSegment& segment);
 
-    inline wxList& GetDoodleSegments() const { return (wxList&) m_doodleSegments; };
+    // remove the last segment, if any, and copy it in the provided pointer if
+    // not NULL and return true or return false and do nothing if there are no
+    // segments
+    bool PopLastSegment(DoodleSegment *segment);
+
+    // get direct access to our segments (for DrawingView)
+    const DoodleSegments& GetSegments() const { return m_doodleSegments; }
+
+private:
+    void DoUpdate();
+
+    DoodleSegments m_doodleSegments;
+
+    DECLARE_DYNAMIC_CLASS(DrawingDocument)
 };
 
-#define DOODLE_CUT          1
-#define DOODLE_ADD          2
 
+// ----------------------------------------------------------------------------
+// Some operations (which can be done and undone by the view) on the document:
+// ----------------------------------------------------------------------------
+
+// Base class for all operations on DrawingDocument
 class DrawingCommand : public wxCommand
 {
-protected:
-    DoodleSegment*   m_segment;
-    DrawingDocument* m_doc;
-    int m_cmd;
 public:
-    DrawingCommand(const wxString& name, int cmd, DrawingDocument*, DoodleSegment*);
-    virtual ~DrawingCommand();
+    DrawingCommand(DrawingDocument *doc,
+                   const wxString& name,
+                   const DoodleSegment& segment = DoodleSegment())
+        : wxCommand(true, name),
+          m_doc(doc),
+          m_segment(segment)
+    {
+    }
 
-    bool Do(void);
-    bool Undo(void);
+protected:
+    bool DoAdd() { m_doc->AddDoodleSegment(m_segment); return true; }
+    bool DoRemove() { return m_doc->PopLastSegment(&m_segment); }
+
+private:
+    DrawingDocument * const m_doc;
+    DoodleSegment m_segment;
 };
 
+// The command for adding a new segment
+class DrawingAddSegmentCommand : public DrawingCommand
+{
+public:
+    DrawingAddSegmentCommand(DrawingDocument *doc, const DoodleSegment& segment)
+        : DrawingCommand(doc, "Add new segment", segment)
+    {
+    }
+
+    virtual bool Do() { return DoAdd(); }
+    virtual bool Undo() { return DoRemove(); }
+};
+
+// The command for removing the last segment
+class DrawingRemoveSegmentCommand : public DrawingCommand
+{
+public:
+    DrawingRemoveSegmentCommand(DrawingDocument *doc)
+        : DrawingCommand(doc, "Remove last segment")
+    {
+    }
+
+    virtual bool Do() { return DoRemove(); }
+    virtual bool Undo() { return DoAdd(); }
+};
+
+
+// ----------------------------------------------------------------------------
+// A simple text document class
+// ----------------------------------------------------------------------------
+
 class TextEditView;
 class TextEditDocument : public wxDocument
 {
-    DECLARE_DYNAMIC_CLASS(TextEditDocument)
 public:
-    TextEditDocument() : wxDocument() {}
-    virtual ~TextEditDocument() {}
-/*
-    wxSTD ostream& SaveObject(wxSTD ostream&);
-    wxSTD istream& LoadObject(wxSTD istream&);
-*/
-    TextEditView* GetFirstView() const;
+    TextEditDocument() : wxDocument() { }
+    TextEditView *GetFirstView() const;
 
     virtual bool DoSaveDocument(const wxString& filename);
     virtual bool DoOpenDocument(const wxString& filename);
-    virtual bool IsModified(void) const;
+    virtual bool IsModified() const;
     virtual void Modify(bool mod);
+
+    DECLARE_NO_COPY_CLASS(TextEditDocument)
+    DECLARE_DYNAMIC_CLASS(TextEditDocument)
 };
 
-
-#endif
+#endif // _WX_SAMPLES_DOCVIEW_DOC_H_