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