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