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 static float xpos = -1;
  35 static 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     m_frame = wxGetApp().CreateChildFrame(doc, this, true);
  46     m_frame->SetTitle(wxT("DrawingView"));
  47
  48     m_canvas = GetMainFrame()->CreateCanvas(this, m_frame);
  49 #ifdef __X__
  50     // X seems to require a forced resize
  51     int x, y;
  52     m_frame->GetSize(&x, &y);
  53     m_frame->SetSize(wxDefaultCoord, wxDefaultCoord, x, y);
  54 #endif
  55     m_frame->Show(true);
  56     Activate(true);
  57
  58     return true;
  59 }
  60
  61 DrawingDocument* DrawingView::GetDocument()
  62 {
  63     return wxStaticCast(wxView::GetDocument(), DrawingDocument);
  64 }
  65
  66 // Sneakily gets used for default print/preview
  67 // as well as drawing on the screen.
  68 void DrawingView::OnDraw(wxDC *dc)
  69 {
  70     dc->SetFont(*wxNORMAL_FONT);
  71     dc->SetPen(*wxBLACK_PEN);
  72
  73     wxList::compatibility_iterator node = GetDocument()->GetDoodleSegments().GetFirst();
  74     while (node)
  75     {
  76         DoodleSegment* seg = (DoodleSegment*)node->GetData();
  77         seg->Draw(dc);
  78         node = node->GetNext();
  79     }
  80 }
  81
  82 void DrawingView::OnUpdate(wxView *WXUNUSED(sender), wxObject *WXUNUSED(hint))
  83 {
  84     if (m_canvas)
  85         m_canvas->Refresh();
  86
  87 /* Is the following necessary?
  88 #ifdef __WXMSW__
  89     if (canvas)
  90         canvas->Refresh();
  91 #else
  92     if (canvas)
  93     {
  94         wxClientDC dc(canvas);
  95         dc.Clear();
  96         OnDraw(& dc);
  97     }
  98 #endif
  99 */
 100 }
 101
 102 // Clean up windows used for displaying the view.
 103 bool DrawingView::OnClose(bool deleteWindow)
 104 {
 105     if (!GetDocument()->Close())
 106         return false;
 107
 108     // Clear the canvas in  case we're in single-window mode,
 109     // and the canvas stays.
 110     m_canvas->ClearBackground();
 111     m_canvas->m_view = NULL;
 112     m_canvas = NULL;
 113
 114     wxString s(wxTheApp->GetAppDisplayName());
 115     if (m_frame)
 116         m_frame->SetTitle(s);
 117
 118     SetFrame(NULL);
 119
 120     Activate(false);
 121
 122     if (deleteWindow)
 123     {
 124         delete m_frame;
 125         return true;
 126     }
 127     return true;
 128 }
 129
 130 void DrawingView::OnCut(wxCommandEvent& WXUNUSED(event) )
 131 {
 132     DrawingDocument* doc = GetDocument();
 133     doc->GetCommandProcessor()->Submit(new DrawingCommand(wxT("Cut Last Segment"), DOODLE_CUT, doc, NULL));
 134 }
 135
 136 IMPLEMENT_DYNAMIC_CLASS(TextEditView, wxView)
 137
 138 bool TextEditView::OnCreate(wxDocument* doc, long WXUNUSED(flags) )
 139 {
 140     m_frame = wxGetApp().CreateChildFrame(doc, this, false);
 141
 142     wxSize size = m_frame->GetClientSize();
 143     m_textsw = new MyTextWindow(this, m_frame, wxPoint(0, 0), size, wxTE_MULTILINE);
 144     m_frame->SetTitle(wxT("TextEditView"));
 145
 146 #ifdef __X__
 147     // X seems to require a forced resize
 148     int x, y;
 149     m_frame->GetSize(&x, &y);
 150     m_frame->SetSize(wxDefaultCoord, wxDefaultCoord, x, y);
 151 #endif
 152
 153     m_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 m_frame;
 178         return true;
 179     }
 180     return true;
 181 }
 182
 183 bool TextEditView::ProcessEvent(wxEvent& event)
 184 {
 185     bool processed = false;
 186     if (!processed) switch (event.GetId())
 187     {
 188         case wxID_COPY:
 189         case wxID_PASTE:
 190         case wxID_SELECTALL:
 191             processed = m_textsw->ProcessEvent(event);
 192             break;
 193     }
 194     if (!processed) processed = wxView::ProcessEvent(event);
 195     return processed;
 196 }
 197
 198 /*
 199  * Window implementations
 200  */
 201
 202 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 203     EVT_MOUSE_EVENTS(MyCanvas::OnMouseEvent)
 204 END_EVENT_TABLE()
 205
 206 // Define a constructor for my canvas
 207 MyCanvas::MyCanvas(DrawingView* view, wxMDIChildFrame* frame, const wxPoint& pos, const wxSize& size, long style):
 208  wxScrolledWindow(frame, wxID_ANY, pos, size, style)
 209 {
 210     m_view = view;
 211 }
 212
 213 // Define the repainting behaviour
 214 void MyCanvas::OnDraw(wxDC& dc)
 215 {
 216     if (m_view)
 217         m_view->OnDraw(& dc);
 218 }
 219
 220 // This implements a tiny doodling program. Drag the mouse using
 221 // the left button.
 222 void MyCanvas::OnMouseEvent(wxMouseEvent& event)
 223 {
 224     if (!m_view)
 225         return;
 226
 227     static DoodleSegment* currentSegment = NULL;
 228
 229     wxClientDC dc(this);
 230     PrepareDC(dc);
 231
 232     dc.SetPen(*wxBLACK_PEN);
 233
 234     wxPoint pt(event.GetLogicalPosition(dc));
 235
 236     if (currentSegment && event.LeftUp())
 237     {
 238         if (currentSegment->m_lines.GetCount() == 0)
 239         {
 240             delete currentSegment;
 241             currentSegment = NULL;
 242         }
 243         else
 244         {
 245             // We've got a valid segment on mouse left up, so store it.
 246             DrawingDocument* doc = m_view->GetDocument();
 247
 248             doc->GetCommandProcessor()->Submit(new DrawingCommand(wxT("Add Segment"), DOODLE_ADD, doc, currentSegment));
 249
 250             m_view->GetDocument()->Modify(true);
 251             currentSegment = NULL;
 252         }
 253     }
 254
 255     if ( (xpos > -1) && (ypos > -1) && event.Dragging())
 256     {
 257         if (!currentSegment)
 258             currentSegment = new DoodleSegment;
 259
 260         DoodleLine *newLine = new DoodleLine;
 261         newLine->x1 = (long)xpos;
 262         newLine->y1 = (long)ypos;
 263         newLine->x2 = pt.x;
 264         newLine->y2 = pt.y;
 265         currentSegment->m_lines.Append(newLine);
 266
 267         dc.DrawLine( (long)xpos, (long)ypos, pt.x, pt.y);
 268     }
 269     xpos = pt.x;
 270     ypos = pt.y;
 271 }
 272
 273 // Define a constructor for my text subwindow
 274 MyTextWindow::MyTextWindow(wxView* view, wxMDIChildFrame* frame, const wxPoint& pos, const wxSize& size, long style):
 275     wxTextCtrl(frame, wxID_ANY, wxEmptyString, pos, size, style)
 276 {
 277     m_view = view;
 278 }
 279