samples/docview/view.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        samples/docview/view.cpp
   3 // Purpose:     View classes implementation
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin: merge with the MDI version and general cleanup
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Julian Smart
   9 //              (c) 2008 Vadim Zeitlin
  10 // Licence:     wxWindows license
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // For compilers that support precompilation, includes "wx/wx.h".
  14 #include "wx/wxprec.h"
  15
  16 #ifdef __BORLANDC__
  17     #pragma hdrstop
  18 #endif
  19
  20 #ifndef WX_PRECOMP
  21     #include "wx/wx.h"
  22 #endif
  23
  24 #if !wxUSE_DOC_VIEW_ARCHITECTURE
  25     #error You must set wxUSE_DOC_VIEW_ARCHITECTURE to 1 in setup.h!
  26 #endif
  27
  28 #include "docview.h"
  29 #include "doc.h"
  30 #include "view.h"
  31
  32 // ----------------------------------------------------------------------------
  33 // DrawingView implementation
  34 // ----------------------------------------------------------------------------
  35
  36 IMPLEMENT_DYNAMIC_CLASS(DrawingView, wxView)
  37
  38 BEGIN_EVENT_TABLE(DrawingView, wxView)
  39     EVT_MENU(wxID_CUT, DrawingView::OnCut)
  40 END_EVENT_TABLE()
  41
  42 // What to do when a view is created. Creates actual
  43 // windows for displaying the view.
  44 bool DrawingView::OnCreate(wxDocument *doc, long WXUNUSED(flags) )
  45 {
  46     MyApp& app = wxGetApp();
  47     if ( app.GetMode() != MyApp::Mode_Single )
  48     {
  49         // create a new window and canvas inside it
  50         m_frame = app.CreateChildFrame(doc, this, true);
  51         m_frame->SetTitle("Drawing View");
  52
  53         m_canvas = new MyCanvas(this, m_frame);
  54         m_frame->Show(true);
  55     }
  56     else // single document mode
  57     {
  58         // reuse the existing window and canvas
  59         m_frame = wxStaticCast(app.GetTopWindow(), wxFrame);
  60         m_canvas = app.GetMainWindowCanvas();
  61         m_canvas->SetView(this);
  62
  63         // Associate the appropriate frame with this view.
  64         SetFrame(m_frame);
  65
  66         // Make sure the document manager knows that this is the
  67         // current view.
  68         Activate(true);
  69
  70         // Initialize the edit menu Undo and Redo items
  71         doc->GetCommandProcessor()->SetEditMenu(app.GetMainWindowEditMenu());
  72         doc->GetCommandProcessor()->Initialize();
  73     }
  74
  75     return true;
  76 }
  77
  78 // Sneakily gets used for default print/preview as well as drawing on the
  79 // screen.
  80 void DrawingView::OnDraw(wxDC *dc)
  81 {
  82     dc->SetPen(*wxBLACK_PEN);
  83
  84     // simply draw all lines of all segments
  85     const DoodleSegments& segments = GetDocument()->GetSegments();
  86     for ( DoodleSegments::const_iterator i = segments.begin();
  87           i != segments.end();
  88           ++i )
  89     {
  90         const DoodleLines& lines = i->GetLines();
  91         for ( DoodleLines::const_iterator j = lines.begin();
  92               j != lines.end();
  93               ++j )
  94         {
  95             const DoodleLine& line = *j;
  96
  97             dc->DrawLine(line.x1, line.y1, line.x2, line.y2);
  98         }
  99     }
 100 }
 101
 102 DrawingDocument* DrawingView::GetDocument()
 103 {
 104     return wxStaticCast(wxView::GetDocument(), DrawingDocument);
 105 }
 106
 107 void DrawingView::OnUpdate(wxView* sender, wxObject* hint)
 108 {
 109     wxView::OnUpdate(sender, hint);
 110     if ( m_canvas )
 111         m_canvas->Refresh();
 112 }
 113
 114 // Clean up windows used for displaying the view.
 115 bool DrawingView::OnClose(bool deleteWindow)
 116 {
 117     if ( !GetDocument()->Close() )
 118         return false;
 119
 120     Activate(false);
 121
 122     // Clear the canvas in single-window mode in which it stays alive
 123     if ( wxGetApp().GetMode() == MyApp::Mode_Single )
 124     {
 125         m_canvas->ClearBackground();
 126         m_canvas->ResetView();
 127         m_canvas = NULL;
 128
 129         if ( m_frame )
 130             m_frame->SetTitle(wxTheApp->GetAppDisplayName());
 131     }
 132     else // not single window mode
 133     {
 134         if ( deleteWindow )
 135             wxDELETE(m_frame);
 136     }
 137
 138     SetFrame(NULL);
 139
 140     return true;
 141 }
 142
 143 void DrawingView::OnCut(wxCommandEvent& WXUNUSED(event) )
 144 {
 145     DrawingDocument * const doc = GetDocument();
 146
 147     doc->GetCommandProcessor()->Submit(new DrawingRemoveSegmentCommand(doc));
 148 }
 149
 150 // ----------------------------------------------------------------------------
 151 // TextEditView implementation
 152 // ----------------------------------------------------------------------------
 153
 154 IMPLEMENT_DYNAMIC_CLASS(TextEditView, wxView)
 155
 156 BEGIN_EVENT_TABLE(TextEditView, wxView)
 157     EVT_MENU(wxID_COPY, TextEditView::OnCopy)
 158     EVT_MENU(wxID_PASTE, TextEditView::OnPaste)
 159     EVT_MENU(wxID_SELECTALL, TextEditView::OnSelectAll)
 160 END_EVENT_TABLE()
 161
 162 bool TextEditView::OnCreate(wxDocument *doc, long WXUNUSED(flags))
 163 {
 164     m_frame = wxGetApp().CreateChildFrame(doc, this, false);
 165     m_text = new wxTextCtrl(m_frame, wxID_ANY, "",
 166                             wxPoint(0, 0), m_frame->GetClientSize(),
 167                             wxTE_MULTILINE);
 168
 169     m_frame->SetTitle("Text View");
 170     m_frame->Show(true);
 171
 172     Activate(true);
 173
 174     return true;
 175 }
 176
 177 void TextEditView::OnDraw(wxDC *WXUNUSED(dc))
 178 {
 179     // nothing to do here, wxTextCtrl draws itself
 180 }
 181
 182 bool TextEditView::OnClose(bool deleteWindow)
 183 {
 184     if ( !GetDocument()->Close() )
 185         return false;
 186
 187     Activate(false);
 188
 189     if ( wxGetApp().GetMode() == MyApp::Mode_Single )
 190     {
 191         m_text->Clear();
 192     }
 193     else // not single window mode
 194     {
 195         if ( deleteWindow )
 196             wxDELETE(m_frame);
 197     }
 198
 199     return true;
 200 }
 201
 202 // ----------------------------------------------------------------------------
 203 // MyCanvas implementation
 204 // ----------------------------------------------------------------------------
 205
 206 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 207     EVT_MOUSE_EVENTS(MyCanvas::OnMouseEvent)
 208 END_EVENT_TABLE()
 209
 210 // Define a constructor for my canvas
 211 MyCanvas::MyCanvas(wxView *view, wxWindow *parent)
 212     : wxScrolledWindow(parent, wxID_ANY, wxPoint(0, 0), parent->GetClientSize())
 213 {
 214     m_view = view;
 215     m_currentSegment = NULL;
 216     m_lastMousePos = wxDefaultPosition;
 217
 218     SetCursor(wxCursor(wxCURSOR_PENCIL));
 219
 220     // this is completely arbitrary and is done just for illustration purposes
 221     SetVirtualSize(1000, 1000);
 222     SetScrollRate(20, 20);
 223
 224     SetBackgroundColour(*wxWHITE);
 225 }
 226
 227 MyCanvas::~MyCanvas()
 228 {
 229     delete m_currentSegment;
 230 }
 231
 232 // Define the repainting behaviour
 233 void MyCanvas::OnDraw(wxDC& dc)
 234 {
 235     if ( m_view )
 236         m_view->OnDraw(& dc);
 237 }
 238
 239 // This implements a tiny doodling program. Drag the mouse using the left
 240 // button.
 241 void MyCanvas::OnMouseEvent(wxMouseEvent& event)
 242 {
 243     if ( !m_view )
 244         return;
 245
 246     wxClientDC dc(this);
 247     PrepareDC(dc);
 248
 249     dc.SetPen(*wxBLACK_PEN);
 250
 251     const wxPoint pt(event.GetLogicalPosition(dc));
 252
 253     // is this the end of the current segment?
 254     if ( m_currentSegment && event.LeftUp() )
 255     {
 256         if ( !m_currentSegment->IsEmpty() )
 257         {
 258             // We've got a valid segment on mouse left up, so store it.
 259             DrawingDocument * const
 260                 doc = wxStaticCast(m_view->GetDocument(), DrawingDocument);
 261
 262             doc->GetCommandProcessor()->Submit(
 263                 new DrawingAddSegmentCommand(doc, *m_currentSegment));
 264
 265             doc->Modify(true);
 266         }
 267
 268         delete m_currentSegment;
 269         m_currentSegment = NULL;
 270     }
 271
 272     // is this the start of a new segment?
 273     if ( m_lastMousePos != wxDefaultPosition && event.Dragging() )
 274     {
 275         if ( !m_currentSegment )
 276             m_currentSegment = new DoodleSegment;
 277
 278         m_currentSegment->AddLine(m_lastMousePos, pt);
 279
 280         dc.DrawLine(m_lastMousePos, pt);
 281     }
 282
 283     m_lastMousePos = pt;
 284 }
 285
 286 // ----------------------------------------------------------------------------
 287 // ImageCanvas implementation
 288 // ----------------------------------------------------------------------------
 289
 290 // Define a constructor for my canvas
 291 ImageCanvas::ImageCanvas(wxView* view, wxWindow* parent)
 292     : wxScrolledWindow(parent, wxID_ANY, wxPoint(0, 0), parent->GetClientSize())
 293 {
 294     SetScrollRate( 10, 10 );
 295
 296     m_view = view;
 297 }
 298
 299 // Define the repainting behaviour
 300 void ImageCanvas::OnDraw(wxDC& dc)
 301 {
 302     if ( m_view )
 303         m_view->OnDraw(& dc);
 304 }
 305
 306 // ----------------------------------------------------------------------------
 307 // ImageView implementation
 308 // ----------------------------------------------------------------------------
 309
 310 IMPLEMENT_DYNAMIC_CLASS(ImageView, wxView)
 311
 312 ImageDocument* ImageView::GetDocument()
 313 {
 314     return wxStaticCast(wxView::GetDocument(), ImageDocument);
 315 }
 316
 317 bool ImageView::OnCreate(wxDocument* doc, long WXUNUSED(flags))
 318 {
 319     m_frame = wxGetApp().CreateChildFrame(doc, this, false);
 320     m_frame->SetTitle("Image View");
 321     m_canvas = new ImageCanvas(this, m_frame);
 322     m_frame->Show(true);
 323     Activate(true);
 324     return true;
 325 }
 326
 327 void ImageView::OnUpdate(wxView* sender, wxObject* hint)
 328 {
 329     wxView::OnUpdate(sender, hint);
 330     wxImage image = GetDocument()->GetImage();
 331     if ( image.IsOk() )
 332     {
 333         m_canvas->SetVirtualSize(image.GetWidth(), image.GetHeight());
 334     }
 335 }
 336
 337 void ImageView::OnDraw(wxDC* dc)
 338 {
 339     wxImage image = GetDocument()->GetImage();
 340     if ( image.IsOk() )
 341     {
 342         dc->DrawBitmap(wxBitmap(image), 0, 0);
 343     }
 344 }
 345
 346 bool ImageView::OnClose(bool deleteWindow)
 347 {
 348     if ( !GetDocument()->Close() )
 349         return false;
 350
 351     Activate(false);
 352
 353     if ( wxGetApp().GetMode() == MyApp::Mode_Single )
 354     {
 355         GetDocument()->DeleteContents();
 356     }
 357     else // not single window mode
 358     {
 359         if ( deleteWindow )
 360             wxDELETE(m_frame);
 361     }
 362     return true;
 363 }
 364