samples/docvwmdi/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
   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 !wxUSE_DOC_VIEW_ARCHITECTURE
  28 #error You must set wxUSE_DOC_VIEW_ARCHITECTURE to 1 in 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     frame = wxGetApp().CreateChildFrame(doc, this, TRUE);
  50     frame->SetTitle(_T("DrawingView"));
  51
  52     canvas = GetMainFrame()->CreateCanvas(this, frame);
  53 #ifdef __X__
  54     // X seems to require a forced resize
  55     int x, y;
  56     frame->GetSize(&x, &y);
  57     frame->SetSize(-1, -1, x, y);
  58 #endif
  59     frame->Show(TRUE);
  60     Activate(TRUE);
  61
  62     return TRUE;
  63 }
  64
  65 // Sneakily gets used for default print/preview
  66 // as well as drawing on the screen.
  67 void DrawingView::OnDraw(wxDC *dc)
  68 {
  69   dc->SetFont(*wxNORMAL_FONT);
  70   dc->SetPen(*wxBLACK_PEN);
  71
  72   wxNode *node = ((DrawingDocument *)GetDocument())->GetDoodleSegments().GetFirst();
  73   while (node)
  74   {
  75     DoodleSegment *seg = (DoodleSegment *)node->GetData();
  76     seg->Draw(dc);
  77     node = node->GetNext();
  78   }
  79 }
  80
  81 void DrawingView::OnUpdate(wxView *WXUNUSED(sender), wxObject *WXUNUSED(hint))
  82 {
  83   if (canvas)
  84     canvas->Refresh();
  85
  86 /* Is the following necessary?
  87 #ifdef __WXMSW__
  88   if (canvas)
  89     canvas->Refresh();
  90 #else
  91   if (canvas)
  92     {
  93       wxClientDC dc(canvas);
  94       dc.Clear();
  95       OnDraw(& dc);
  96     }
  97 #endif
  98 */
  99 }
 100
 101 // Clean up windows used for displaying the view.
 102 bool DrawingView::OnClose(bool deleteWindow)
 103 {
 104   if (!GetDocument()->Close())
 105     return FALSE;
 106
 107   // Clear the canvas in  case we're in single-window mode,
 108   // and the canvas stays.
 109   canvas->Clear();
 110   canvas->view = (wxView *) NULL;
 111   canvas = (MyCanvas *) NULL;
 112
 113   wxString s(wxTheApp->GetAppName());
 114   if (frame)
 115     frame->SetTitle(s);
 116
 117   SetFrame((wxFrame*)NULL);
 118
 119   Activate(FALSE);
 120
 121   if (deleteWindow)
 122   {
 123     delete frame;
 124     return TRUE;
 125   }
 126   return TRUE;
 127 }
 128
 129 void DrawingView::OnCut(wxCommandEvent& WXUNUSED(event) )
 130 {
 131     DrawingDocument *doc = (DrawingDocument *)GetDocument();
 132     doc->GetCommandProcessor()->Submit(new DrawingCommand(_T("Cut Last Segment"), DOODLE_CUT, doc, (DoodleSegment *) NULL));
 133 }
 134
 135 IMPLEMENT_DYNAMIC_CLASS(TextEditView, wxView)
 136
 137 bool TextEditView::OnCreate(wxDocument *doc, long WXUNUSED(flags) )
 138 {
 139   frame = wxGetApp().CreateChildFrame(doc, this, FALSE);
 140
 141   int width, height;
 142   frame->GetClientSize(&width, &height);
 143   textsw = new MyTextWindow(this, frame, wxPoint(0, 0), wxSize(width, height), wxTE_MULTILINE);
 144   frame->SetTitle(_T("TextEditView"));
 145
 146 #ifdef __X__
 147   // X seems to require a forced resize
 148   int x, y;
 149   frame->GetSize(&x, &y);
 150   frame->SetSize(-1, -1, x, y);
 151 #endif
 152
 153   frame->Show(TRUE);
 154   Activate(TRUE);
 155
 156   return TRUE;
 157 }
 158
 159 // Handled by wxTextWindow
 160 void TextEditView::OnDraw(wxDC *WXUNUSED(dc) )
 161 {
 162 }
 163
 164 void TextEditView::OnUpdate(wxView *WXUNUSED(sender), wxObject *WXUNUSED(hint) )
 165 {
 166 }
 167
 168 bool TextEditView::OnClose(bool deleteWindow)
 169 {
 170   if (!GetDocument()->Close())
 171     return FALSE;
 172
 173   Activate(FALSE);
 174
 175   if (deleteWindow)
 176   {
 177     delete frame;
 178     return TRUE;
 179   }
 180   return TRUE;
 181 }
 182
 183 /*
 184  * Window implementations
 185  */
 186
 187 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 188     EVT_MOUSE_EVENTS(MyCanvas::OnMouseEvent)
 189 END_EVENT_TABLE()
 190
 191 // Define a constructor for my canvas
 192 MyCanvas::MyCanvas(wxView *v, wxMDIChildFrame *frame, const wxPoint& pos, const wxSize& size, long style):
 193  wxScrolledWindow(frame, -1, pos, size, style)
 194 {
 195   view = v;
 196 }
 197
 198 // Define the repainting behaviour
 199 void MyCanvas::OnDraw(wxDC& dc)
 200 {
 201   if (view)
 202     view->OnDraw(& dc);
 203 }
 204
 205 // This implements a tiny doodling program. Drag the mouse using
 206 // the left button.
 207 void MyCanvas::OnMouseEvent(wxMouseEvent& event)
 208 {
 209   if (!view)
 210     return;
 211
 212   static DoodleSegment *currentSegment = (DoodleSegment *) NULL;
 213
 214   wxClientDC dc(this);
 215   PrepareDC(dc);
 216
 217   dc.SetPen(*wxBLACK_PEN);
 218
 219   wxPoint pt(event.GetLogicalPosition(dc));
 220
 221   if (currentSegment && event.LeftUp())
 222   {
 223     if (currentSegment->lines.GetCount() == 0)
 224     {
 225       delete currentSegment;
 226       currentSegment = (DoodleSegment *) NULL;
 227     }
 228     else
 229     {
 230       // We've got a valid segment on mouse left up, so store it.
 231       DrawingDocument *doc = (DrawingDocument *)view->GetDocument();
 232
 233       doc->GetCommandProcessor()->Submit(new DrawingCommand(_T("Add Segment"), DOODLE_ADD, doc, currentSegment));
 234
 235       view->GetDocument()->Modify(TRUE);
 236       currentSegment = (DoodleSegment *) NULL;
 237     }
 238   }
 239
 240   if (xpos > -1 && ypos > -1 && event.Dragging())
 241   {
 242     if (!currentSegment)
 243       currentSegment = new DoodleSegment;
 244
 245     DoodleLine *newLine = new DoodleLine;
 246     newLine->x1 = (long)xpos;
 247     newLine->y1 = (long)ypos;
 248     newLine->x2 = pt.x;
 249     newLine->y2 = pt.y;
 250     currentSegment->lines.Append(newLine);
 251
 252     dc.DrawLine( (long)xpos, (long)ypos, pt.x, pt.y);
 253   }
 254   xpos = pt.x;
 255   ypos = pt.y;
 256 }
 257
 258 // Define a constructor for my text subwindow
 259 MyTextWindow::MyTextWindow(wxView *v, wxMDIChildFrame *frame, const wxPoint& pos, const wxSize& size, long style):
 260  wxTextCtrl(frame, -1, _T(""), pos, size, style)
 261 {
 262   view = v;
 263 }
 264
 265