samples/docview/view.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        view.cpp
   3 // Purpose:     View classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 // #pragma implementation
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx/wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/wx.h"
  25 #endif
  26
  27 #if !USE_DOC_VIEW_ARCHITECTURE
  28 #error You must set USE_DOC_VIEW_ARCHITECTURE to 1 in wx_setup.h!
  29 #endif
  30
  31 #include "docview.h"
  32 #include "doc.h"
  33 #include "view.h"
  34
  35 IMPLEMENT_DYNAMIC_CLASS(DrawingView, wxView)
  36
  37 // For drawing lines in a canvas
  38 float xpos = -1;
  39 float ypos = -1;
  40
  41 BEGIN_EVENT_TABLE(DrawingView, wxView)
  42     EVT_MENU(DOODLE_CUT, DrawingView::OnCut)
  43 END_EVENT_TABLE()
  44
  45 // What to do when a view is created. Creates actual
  46 // windows for displaying the view.
  47 bool DrawingView::OnCreate(wxDocument *doc, long WXUNUSED(flags) )
  48 {
  49   if (!singleWindowMode)
  50   {
  51     // Multiple windows
  52     frame = wxGetApp().CreateChildFrame(doc, this, TRUE);
  53     frame->SetTitle("DrawingView");
  54
  55     canvas = GetMainFrame()->CreateCanvas(this, frame);
  56 #ifdef __X__
  57     // X seems to require a forced resize
  58     int x, y;
  59     frame->GetSize(&x, &y);
  60     frame->SetSize(x, y);
  61 #endif
  62     frame->Show(TRUE);
  63   }
  64   else
  65   {
  66     // Single-window mode
  67     frame = GetMainFrame();
  68     canvas = GetMainFrame()->canvas;
  69     canvas->view = this;
  70
  71     // Associate the appropriate frame with this view.
  72     SetFrame(frame);
  73
  74     // Make sure the document manager knows that this is the
  75     // current view.
  76     Activate(TRUE);
  77
  78     // Initialize the edit menu Undo and Redo items
  79     doc->GetCommandProcessor()->SetEditMenu(((MyFrame *)frame)->editMenu);
  80     doc->GetCommandProcessor()->Initialize();
  81   }
  82
  83   return TRUE;
  84 }
  85
  86 // Sneakily gets used for default print/preview
  87 // as well as drawing on the screen.
  88 void DrawingView::OnDraw(wxDC *dc)
  89 {
  90   dc->SetFont(*wxNORMAL_FONT);
  91   dc->SetPen(*wxBLACK_PEN);
  92
  93   wxNode *node = ((DrawingDocument *)GetDocument())->GetDoodleSegments().First();
  94   while (node)
  95   {
  96     DoodleSegment *seg = (DoodleSegment *)node->Data();
  97     seg->Draw(dc);
  98     node = node->Next();
  99   }
 100 }
 101
 102 void DrawingView::OnUpdate(wxView *WXUNUSED(sender), wxObject *WXUNUSED(hint))
 103 {
 104   if (canvas)
 105     canvas->Refresh();
 106
 107 /* Is the following necessary?
 108 #ifdef __WXMSW__
 109   if (canvas)
 110     canvas->Refresh();
 111 #else
 112   if (canvas)
 113     {
 114       wxClientDC dc(canvas);
 115       dc.Clear();
 116       OnDraw(& dc);
 117     }
 118 #endif
 119 */
 120 }
 121
 122 // Clean up windows used for displaying the view.
 123 bool DrawingView::OnClose(bool deleteWindow)
 124 {
 125   if (!GetDocument()->Close())
 126     return FALSE;
 127
 128   // Clear the canvas in  case we're in single-window mode,
 129   // and the canvas stays.
 130   canvas->Clear();
 131   canvas->view = NULL;
 132   canvas = NULL;
 133
 134   wxString s(wxTheApp->GetAppName());
 135   if (frame)
 136     frame->SetTitle(s);
 137
 138   SetFrame(NULL);
 139
 140   Activate(FALSE);
 141
 142   if (deleteWindow && !singleWindowMode)
 143   {
 144     delete frame;
 145     return TRUE;
 146   }
 147   return TRUE;
 148 }
 149
 150 void DrawingView::OnCut(wxCommandEvent& WXUNUSED(event) )
 151 {
 152     DrawingDocument *doc = (DrawingDocument *)GetDocument();
 153     doc->GetCommandProcessor()->Submit(new DrawingCommand("Cut Last Segment", DOODLE_CUT, doc, NULL));
 154 }
 155
 156 IMPLEMENT_DYNAMIC_CLASS(TextEditView, wxView)
 157
 158 bool TextEditView::OnCreate(wxDocument *doc, long WXUNUSED(flags) )
 159 {
 160   frame = wxGetApp().CreateChildFrame(doc, this, FALSE);
 161
 162   int width, height;
 163   frame->GetClientSize(&width, &height);
 164   textsw = new MyTextWindow(this, frame, wxPoint(0, 0), wxSize(width, height), wxTE_MULTILINE);
 165   frame->SetTitle("TextEditView");
 166
 167 #ifdef __X__
 168   // X seems to require a forced resize
 169   int x, y;
 170   frame->GetSize(&x, &y);
 171   frame->SetSize(x, y);
 172 #endif
 173
 174   frame->Show(TRUE);
 175   Activate(TRUE);
 176
 177   return TRUE;
 178 }
 179
 180 // Handled by wxTextWindow
 181 void TextEditView::OnDraw(wxDC *WXUNUSED(dc) )
 182 {
 183 }
 184
 185 void TextEditView::OnUpdate(wxView *WXUNUSED(sender), wxObject *WXUNUSED(hint) )
 186 {
 187 }
 188
 189 bool TextEditView::OnClose(bool deleteWindow)
 190 {
 191   if (!GetDocument()->Close())
 192     return FALSE;
 193
 194   Activate(FALSE);
 195
 196   if (deleteWindow)
 197   {
 198     delete frame;
 199     return TRUE;
 200   }
 201   return TRUE;
 202 }
 203
 204 /*
 205  * Window implementations
 206  */
 207
 208 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 209     EVT_MOUSE_EVENTS(MyCanvas::OnMouseEvent)
 210 END_EVENT_TABLE()
 211
 212 // Define a constructor for my canvas
 213 MyCanvas::MyCanvas(wxView *v, wxFrame *frame, const wxPoint& pos, const wxSize& size, const long style):
 214  wxScrolledWindow(frame, -1, pos, size, style)
 215 {
 216   view = v;
 217 }
 218
 219 // Define the repainting behaviour
 220 void MyCanvas::OnDraw(wxDC& dc)
 221 {
 222   if (view)
 223     view->OnDraw(& dc);
 224 }
 225
 226 // This implements a tiny doodling program. Drag the mouse using
 227 // the left button.
 228 void MyCanvas::OnMouseEvent(wxMouseEvent& event)
 229 {
 230   if (!view)
 231     return;
 232
 233   static DoodleSegment *currentSegment = NULL;
 234
 235   wxClientDC dc(this);
 236   PrepareDC(dc);
 237
 238   dc.SetPen(*wxBLACK_PEN);
 239
 240   wxPoint pt(event.GetLogicalPosition(dc));
 241
 242   if (currentSegment && event.LeftUp())
 243   {
 244     if (currentSegment->lines.Number() == 0)
 245     {
 246       delete currentSegment;
 247       currentSegment = NULL;
 248     }
 249     else
 250     {
 251       // We've got a valid segment on mouse left up, so store it.
 252       DrawingDocument *doc = (DrawingDocument *)view->GetDocument();
 253
 254       doc->GetCommandProcessor()->Submit(new DrawingCommand("Add Segment", DOODLE_ADD, doc, currentSegment));
 255
 256       view->GetDocument()->Modify(TRUE);
 257       currentSegment = NULL;
 258     }
 259   }
 260
 261   if (xpos > -1 && ypos > -1 && event.Dragging())
 262   {
 263     if (!currentSegment)
 264       currentSegment = new DoodleSegment;
 265
 266     DoodleLine *newLine = new DoodleLine;
 267     newLine->x1 = (long)xpos;
 268     newLine->y1 = (long)ypos;
 269     newLine->x2 = pt.x;
 270     newLine->y2 = pt.y;
 271     currentSegment->lines.Append(newLine);
 272
 273     dc.DrawLine( (long)xpos, (long)ypos, pt.x, pt.y);
 274   }
 275   xpos = pt.x;
 276   ypos = pt.y;
 277 }
 278
 279 // Define a constructor for my text subwindow
 280 MyTextWindow::MyTextWindow(wxView *v, wxFrame *frame, const wxPoint& pos, const wxSize& size, const long style):
 281  wxTextCtrl(frame, -1, "", pos, size, style)
 282 {
 283   view = v;
 284 }
 285
 286