contrib/samples/ogl/ogledit/view.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        view.cpp
   3 // Purpose:     Implements view functionality in OGLEdit
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     12/07/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 // #pragma implementation
  14 #endif
  15
  16 // For compilers that support precompilation, includes "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 #include <wx/colordlg.h>
  28
  29 #if !wxUSE_DOC_VIEW_ARCHITECTURE
  30 #error You must set wxUSE_DOC_VIEW_ARCHITECTURE to 1 in wx_setup.h!
  31 #endif
  32
  33 #include "ogledit.h"
  34 #include "doc.h"
  35 #include "view.h"
  36 #include "palette.h"
  37
  38 IMPLEMENT_DYNAMIC_CLASS(DiagramView, wxView)
  39
  40 BEGIN_EVENT_TABLE(DiagramView, wxView)
  41     EVT_MENU(OGLEDIT_CUT, DiagramView::OnCut)
  42     EVT_MENU(OGLEDIT_CHANGE_BACKGROUND_COLOUR, DiagramView::OnChangeBackgroundColour)
  43     EVT_MENU(OGLEDIT_EDIT_LABEL, DiagramView::OnEditLabel)
  44 END_EVENT_TABLE()
  45
  46 // What to do when a view is created. Creates actual
  47 // windows for displaying the view.
  48 bool DiagramView::OnCreate(wxDocument *doc, long flags)
  49 {
  50   frame = GetMainFrame();
  51   canvas = GetMainFrame()->canvas;
  52   canvas->view = this;
  53
  54   SetFrame(frame);
  55   Activate(TRUE);
  56
  57   // Initialize the edit menu Undo and Redo items
  58   doc->GetCommandProcessor()->SetEditMenu(((MyFrame *)frame)->editMenu);
  59   doc->GetCommandProcessor()->Initialize();
  60
  61   wxShapeCanvas *shapeCanvas = (wxShapeCanvas *)canvas;
  62   DiagramDocument *diagramDoc = (DiagramDocument *)doc;
  63   shapeCanvas->SetDiagram(diagramDoc->GetDiagram());
  64   diagramDoc->GetDiagram()->SetCanvas(shapeCanvas);
  65
  66   return TRUE;
  67 }
  68
  69 #define CENTER  FALSE // Place the drawing to the center of the page
  70
  71
  72 // Sneakily gets used for default print/preview
  73 // as well as drawing on the screen.
  74 void DiagramView::OnDraw(wxDC *dc)
  75 {
  76
  77   /* You might use THIS code if you were scaling
  78    * graphics of known size to fit on the page.
  79    */
  80   int w, h;
  81
  82   // We need to adjust for the graphic size, a formula will be added
  83   float maxX = 900;
  84   float maxY = 700;
  85   // A better way of find the maxium values would be to search through
  86   // the linked list
  87
  88   // Let's have at least 10 device units margin
  89   float marginX = 10;
  90   float marginY = 10;
  91
  92   // Add the margin to the graphic size
  93   maxX += (2 * marginX);
  94   maxY += (2 * marginY);
  95
  96   // Get the size of the DC in pixels
  97   dc->GetSize (&w, &h);
  98
  99   // Calculate a suitable scaling factor
 100   float scaleX = (float) (w / maxX);
 101   float scaleY = (float) (h / maxY);
 102
 103   // Use x or y scaling factor, whichever fits on the DC
 104   float actualScale = wxMin (scaleX, scaleY);
 105
 106   float posX, posY;
 107   // Calculate the position on the DC for centring the graphic
 108   if (CENTER == TRUE) // center the drawing
 109     {
 110       posX = (float) ((w - (200 * actualScale)) / 2.0);
 111       posY = (float) ((h - (200 * actualScale)) / 2.0);
 112     }
 113   else    // Use defined presets
 114     {
 115       posX = 10;
 116       posY = 35;
 117     }
 118
 119
 120   // Set the scale and origin
 121   dc->SetUserScale (actualScale, actualScale);
 122   dc->SetDeviceOrigin ((long) posX, (long) posY);
 123
 124   // This part was added to preform the print preview and printing functions
 125
 126   dc->BeginDrawing(); // Allows optimization of drawing code under MS Windows.
 127   wxDiagram *diagram_p=((DiagramDocument*)GetDocument())->GetDiagram();  // Get the current diagram
 128   if (diagram_p->GetShapeList())
 129   {
 130     wxCursor *old_cursor = NULL;
 131     wxNode *current = diagram_p->GetShapeList()->First();
 132
 133     while (current) // Loop through the entire list of shapes
 134     {
 135         wxShape *object = (wxShape *)current->Data();
 136         if (!object->GetParent())
 137         {
 138             object->Draw(* dc); // Draw the shape onto our printing dc
 139         }
 140         current = current->Next();  // Procede to the next shape in the list
 141     }
 142   }
 143   dc->EndDrawing(); // Allows optimization of drawing code under MS Windows.
 144 }
 145
 146 void DiagramView::OnUpdate(wxView *sender, wxObject *hint)
 147 {
 148   if (canvas)
 149     canvas->Refresh();
 150 }
 151
 152 // Clean up windows used for displaying the view.
 153 bool DiagramView::OnClose(bool deleteWindow)
 154 {
 155   if (!GetDocument()->Close())
 156     return FALSE;
 157
 158   DiagramDocument *diagramDoc = (DiagramDocument *)GetDocument();
 159   diagramDoc->GetDiagram()->SetCanvas(NULL);
 160
 161   canvas->ClearBackground();
 162   canvas->SetDiagram(NULL);
 163   canvas->view = NULL;
 164   canvas = NULL;
 165
 166   wxString s = wxTheApp->GetAppName();
 167   if (frame)
 168     frame->SetTitle(s);
 169
 170   SetFrame(NULL);
 171
 172   Activate(FALSE);
 173
 174   return TRUE;
 175 }
 176
 177 wxShape *DiagramView::FindSelectedShape(void)
 178 {
 179   DiagramDocument *doc = (DiagramDocument *)GetDocument();
 180   wxShape *theShape = NULL;
 181   wxNode *node = doc->GetDiagram()->GetShapeList()->First();
 182   while (node)
 183   {
 184     wxShape *eachShape = (wxShape *)node->Data();
 185     if ((eachShape->GetParent() == NULL) && eachShape->Selected())
 186     {
 187       theShape = eachShape;
 188       node = NULL;
 189     }
 190     else node = node->Next();
 191   }
 192   return theShape;
 193 }
 194
 195 void DiagramView::OnCut(wxCommandEvent& event)
 196 {
 197   DiagramDocument *doc = (DiagramDocument *)GetDocument();
 198
 199   wxShape *theShape = FindSelectedShape();
 200   if (theShape)
 201     doc->GetCommandProcessor()->Submit(new DiagramCommand("Cut", OGLEDIT_CUT, doc, NULL, 0.0, 0.0, TRUE, theShape));
 202 }
 203
 204 void DiagramView::OnChangeBackgroundColour(wxCommandEvent& event)
 205 {
 206       DiagramDocument *doc = (DiagramDocument *)GetDocument();
 207
 208       wxShape *theShape = FindSelectedShape();
 209       if (theShape)
 210       {
 211         wxColourData data;
 212         data.SetChooseFull(TRUE);
 213         data.SetColour(theShape->GetBrush()->GetColour());
 214
 215         wxColourDialog *dialog = new wxColourDialog(frame, &data);
 216         wxBrush *theBrush = NULL;
 217         if (dialog->ShowModal() == wxID_OK)
 218         {
 219           wxColourData retData = dialog->GetColourData();
 220           wxColour col = retData.GetColour();
 221           theBrush = wxTheBrushList->FindOrCreateBrush(col, wxSOLID);
 222         }
 223         dialog->Close();
 224
 225         if (theBrush)
 226           doc->GetCommandProcessor()->Submit(new DiagramCommand("Change colour", OGLEDIT_CHANGE_BACKGROUND_COLOUR, doc,
 227             theBrush, theShape));
 228       }
 229 }
 230
 231 void DiagramView::OnEditLabel(wxCommandEvent& event)
 232 {
 233       wxShape *theShape = FindSelectedShape();
 234       if (theShape)
 235       {
 236         wxString newLabel = wxGetTextFromUser("Enter new label", "Shape Label", ((MyEvtHandler *)theShape->GetEventHandler())->label);
 237         GetDocument()->GetCommandProcessor()->Submit(new DiagramCommand("Edit label", OGLEDIT_EDIT_LABEL, (DiagramDocument*) GetDocument(), newLabel, theShape));
 238       }
 239 }
 240
 241
 242 /*
 243  * Window implementations
 244  */
 245
 246 BEGIN_EVENT_TABLE(MyCanvas, wxShapeCanvas)
 247     EVT_MOUSE_EVENTS(MyCanvas::OnMouseEvent)
 248     EVT_PAINT(MyCanvas::OnPaint)
 249 END_EVENT_TABLE()
 250
 251 // Define a constructor for my canvas
 252 MyCanvas::MyCanvas(wxView *v, wxWindow *parent, wxWindowID id, const wxPoint& pos,
 253     const wxSize& size, long style):
 254  wxShapeCanvas(parent, id, pos, size, style)
 255 {
 256   SetBackgroundColour(*wxWHITE);
 257   view = v;
 258 }
 259
 260 MyCanvas::~MyCanvas(void)
 261 {
 262 }
 263
 264 void MyCanvas::OnLeftClick(double x, double y, int keys)
 265 {
 266   EditorToolPalette *palette = wxGetApp().frame->palette;
 267   wxClassInfo *info = NULL;
 268   switch (palette->currentlySelected)
 269   {
 270     case PALETTE_TOOL1:
 271     {
 272       info = CLASSINFO(wxRectangleShape);
 273       break;
 274     }
 275     case PALETTE_TOOL2:
 276     {
 277       info = CLASSINFO(wxRoundedRectangleShape);
 278       break;
 279     }
 280     case PALETTE_TOOL3:
 281     {
 282       info = CLASSINFO(wxEllipseShape);
 283       break;
 284     }
 285     case PALETTE_TOOL4:
 286     {
 287       info = CLASSINFO(wxDiamondShape);
 288       break;
 289     }
 290     default:
 291       break;
 292   }
 293   if (info)
 294   {
 295     view->GetDocument()->GetCommandProcessor()->Submit(
 296       new DiagramCommand((char*) info->GetClassName(), OGLEDIT_ADD_SHAPE, (DiagramDocument *)view->GetDocument(), info,
 297          x, y));
 298   }
 299 }
 300
 301 void MyCanvas::OnRightClick(double x, double y, int keys)
 302 {
 303 }
 304
 305 void MyCanvas::OnDragLeft(bool draw, double x, double y, int keys)
 306 {
 307 }
 308
 309 void MyCanvas::OnBeginDragLeft(double x, double y, int keys)
 310 {
 311 }
 312
 313 void MyCanvas::OnEndDragLeft(double x, double y, int keys)
 314 {
 315 }
 316
 317 void MyCanvas::OnDragRight(bool draw, double x, double y, int keys)
 318 {
 319 }
 320
 321 void MyCanvas::OnBeginDragRight(double x, double y, int keys)
 322 {
 323 }
 324
 325 void MyCanvas::OnEndDragRight(double x, double y, int keys)
 326 {
 327 }
 328
 329 void MyCanvas::OnMouseEvent(wxMouseEvent& event)
 330 {
 331     wxShapeCanvas::OnMouseEvent(event);
 332 }
 333
 334 void MyCanvas::OnPaint(wxPaintEvent& event)
 335 {
 336 //  if (GetDiagram())
 337     wxShapeCanvas::OnPaint(event);
 338 }