samples/mdi/mdi.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        mdi.cpp
   3 // Purpose:     MDI sample
   4 // Author:      Julian Smart
   5 // Modified by: 2008-10-31 Vadim Zeitlin: big clean up
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1997 Julian Smart
   9 //              (c) 2008 Vadim Zeitlin
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // ===========================================================================
  14 // declarations
  15 // ===========================================================================
  16
  17 // ---------------------------------------------------------------------------
  18 // headers
  19 // ---------------------------------------------------------------------------
  20
  21 // For compilers that support precompilation, includes "wx/wx.h".
  22 #include "wx/wxprec.h"
  23
  24 #ifdef __BORLANDC__
  25     #pragma hdrstop
  26 #endif
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/wx.h"
  30     #include "wx/mdi.h"
  31 #endif
  32
  33 #include "wx/toolbar.h"
  34
  35 #if !defined(__WXMSW__)
  36     #include "../sample.xpm"
  37     #include "chart.xpm"
  38 #endif
  39
  40 #include "bitmaps/new.xpm"
  41 #include "bitmaps/open.xpm"
  42 #include "bitmaps/save.xpm"
  43 #include "bitmaps/copy.xpm"
  44 #include "bitmaps/cut.xpm"
  45 #include "bitmaps/paste.xpm"
  46 #include "bitmaps/print.xpm"
  47 #include "bitmaps/help.xpm"
  48
  49 // replace this 0 with 1 to build the sample using the generic MDI classes (you
  50 // may also need to add src/generic/mdig.cpp to the build)
  51 #if 0
  52     #include "wx/generic/mdig.h"
  53     #define wxMDIParentFrame wxGenericMDIParentFrame
  54     #define wxMDIChildFrame wxGenericMDIChildFrame
  55     #define wxMDIClientWindow wxGenericMDIClientWindow
  56 #endif
  57
  58 #include "mdi.h"
  59
  60 IMPLEMENT_APP(MyApp)
  61
  62 // ---------------------------------------------------------------------------
  63 // event tables
  64 // ---------------------------------------------------------------------------
  65
  66 BEGIN_EVENT_TABLE(MyFrame, wxMDIParentFrame)
  67     EVT_MENU(wxID_ABOUT, MyFrame::OnAbout)
  68     EVT_MENU(wxID_NEW, MyFrame::OnNewWindow)
  69     EVT_MENU(MDI_FULLSCREEN, MyFrame::OnFullScreen)
  70     EVT_MENU(wxID_EXIT, MyFrame::OnQuit)
  71
  72     EVT_MENU(wxID_CLOSE_ALL, MyFrame::OnCloseAll)
  73
  74     EVT_CLOSE(MyFrame::OnClose)
  75 END_EVENT_TABLE()
  76
  77 // Note that wxID_NEW and wxID_ABOUT commands get passed
  78 // to the parent window for processing, so no need to
  79 // duplicate event handlers here.
  80 BEGIN_EVENT_TABLE(MyChild, wxMDIChildFrame)
  81     EVT_MENU(wxID_CLOSE, MyChild::OnClose)
  82     EVT_MENU(MDI_REFRESH, MyChild::OnRefresh)
  83     EVT_MENU(MDI_CHANGE_TITLE, MyChild::OnChangeTitle)
  84     EVT_MENU(MDI_CHANGE_POSITION, MyChild::OnChangePosition)
  85     EVT_MENU(MDI_CHANGE_SIZE, MyChild::OnChangeSize)
  86
  87 #if wxUSE_CLIPBOARD
  88     EVT_MENU(wxID_PASTE, MyChild::OnPaste)
  89     EVT_UPDATE_UI(wxID_PASTE, MyChild::OnUpdatePaste)
  90 #endif // wxUSE_CLIPBOARD
  91
  92     EVT_SIZE(MyChild::OnSize)
  93     EVT_MOVE(MyChild::OnMove)
  94
  95     EVT_CLOSE(MyChild::OnCloseWindow)
  96 END_EVENT_TABLE()
  97
  98 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
  99     EVT_MOUSE_EVENTS(MyCanvas::OnEvent)
 100 END_EVENT_TABLE()
 101
 102 BEGIN_EVENT_TABLE(MyChild::EventHandler, wxEvtHandler)
 103     EVT_MENU(MDI_REFRESH, MyChild::EventHandler::OnRefresh)
 104 END_EVENT_TABLE()
 105
 106 // ===========================================================================
 107 // implementation
 108 // ===========================================================================
 109
 110 // ---------------------------------------------------------------------------
 111 // MyApp
 112 // ---------------------------------------------------------------------------
 113
 114 // Initialise this in OnInit, not statically
 115 bool MyApp::OnInit()
 116 {
 117     if ( !wxApp::OnInit() )
 118         return false;
 119
 120     // Create the main frame window
 121
 122     MyFrame *frame = new MyFrame;
 123
 124     frame->Show(true);
 125
 126     return true;
 127 }
 128
 129 // ---------------------------------------------------------------------------
 130 // MyFrame
 131 // ---------------------------------------------------------------------------
 132
 133 // Define my frame constructor
 134 MyFrame::MyFrame()
 135        : wxMDIParentFrame(NULL, wxID_ANY, "wxWidgets MDI Sample",
 136                           wxDefaultPosition, wxSize(500, 400))
 137 {
 138     SetIcon(wxICON(sample));
 139
 140     // Make a menubar
 141 #if wxUSE_MENUS
 142     // Associate the menu bar with the frame
 143     SetMenuBar(CreateMainMenubar());
 144
 145
 146     // This shows that the standard window menu may be customized:
 147     wxMenu * const windowMenu = GetWindowMenu();
 148     if ( windowMenu )
 149     {
 150         // we can change the labels of standard items (which also means we can
 151         // set up accelerators for them as they're part of the label)
 152         windowMenu->SetLabel(wxID_MDI_WINDOW_TILE_HORZ,
 153                              "&Tile horizontally\tCtrl-Shift-H");
 154         windowMenu->SetLabel(wxID_MDI_WINDOW_TILE_VERT,
 155                              "&Tile vertically\tCtrl-Shift-V");
 156
 157         // we can also change the help string
 158         windowMenu->SetHelpString(wxID_MDI_WINDOW_CASCADE,
 159                                   "Arrange windows in cascade");
 160
 161         // we can remove some items
 162         windowMenu->Delete(wxID_MDI_WINDOW_ARRANGE_ICONS);
 163
 164         // and we can add completely custom commands -- but then we must handle
 165         // them ourselves, see OnCloseAll()
 166         windowMenu->AppendSeparator();
 167         windowMenu->Append(wxID_CLOSE_ALL, "&Close all windows\tCtrl-Shift-C",
 168                            "Close all open windows");
 169
 170         SetWindowMenu(windowMenu);
 171     }
 172 #endif // wxUSE_MENUS
 173
 174 #if wxUSE_STATUSBAR
 175     CreateStatusBar();
 176 #endif // wxUSE_STATUSBAR
 177
 178
 179     m_textWindow = new wxTextCtrl(this, wxID_ANY, "A help window",
 180                                   wxDefaultPosition, wxDefaultSize,
 181                                   wxTE_MULTILINE | wxSUNKEN_BORDER);
 182
 183 #if wxUSE_TOOLBAR
 184     CreateToolBar(wxNO_BORDER | wxTB_FLAT | wxTB_HORIZONTAL);
 185     InitToolBar(GetToolBar());
 186 #endif // wxUSE_TOOLBAR
 187
 188 #if wxUSE_ACCEL
 189     // Accelerators
 190     wxAcceleratorEntry entries[3];
 191     entries[0].Set(wxACCEL_CTRL, (int) 'N', wxID_NEW);
 192     entries[1].Set(wxACCEL_CTRL, (int) 'X', wxID_EXIT);
 193     entries[2].Set(wxACCEL_CTRL, (int) 'A', wxID_ABOUT);
 194     wxAcceleratorTable accel(3, entries);
 195     SetAcceleratorTable(accel);
 196 #endif // wxUSE_ACCEL
 197
 198     // connect it only now, after creating m_textWindow
 199     Connect(wxEVT_SIZE, wxSizeEventHandler(MyFrame::OnSize));
 200 }
 201
 202 MyFrame::~MyFrame()
 203 {
 204     // and disconnect it to prevent accessing already deleted m_textWindow in
 205     // the size event handler if it's called during destruction
 206     Disconnect(wxEVT_SIZE, wxSizeEventHandler(MyFrame::OnSize));
 207 }
 208
 209 #if wxUSE_MENUS
 210 /* static */
 211 wxMenuBar *MyFrame::CreateMainMenubar()
 212 {
 213     wxMenu *menuFile = new wxMenu;
 214
 215     menuFile->Append(wxID_NEW, "&New window\tCtrl-N", "Create a new child window");
 216     menuFile->AppendCheckItem(MDI_FULLSCREEN, "Show &full screen\tCtrl-F");
 217     menuFile->Append(wxID_EXIT, "&Exit\tAlt-X", "Quit the program");
 218
 219     wxMenu *menuHelp = new wxMenu;
 220     menuHelp->Append(wxID_ABOUT, "&About\tF1");
 221
 222     wxMenuBar *mbar = new wxMenuBar;
 223     mbar->Append(menuFile, "&File");
 224     mbar->Append(menuHelp, "&Help");
 225
 226     return mbar;
 227 }
 228 #endif // wxUSE_MENUS
 229
 230 void MyFrame::OnClose(wxCloseEvent& event)
 231 {
 232     unsigned numChildren = MyChild::GetChildrenCount();
 233     if ( event.CanVeto() && (numChildren > 0) )
 234     {
 235         wxString msg;
 236         msg.Printf("%d windows still open, close anyhow?", numChildren);
 237         if ( wxMessageBox(msg, "Please confirm",
 238                           wxICON_QUESTION | wxYES_NO) != wxYES )
 239         {
 240             event.Veto();
 241
 242             return;
 243         }
 244     }
 245
 246     event.Skip();
 247 }
 248
 249 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 250 {
 251     Close();
 252 }
 253
 254 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) )
 255 {
 256     (void)wxMessageBox("wxWidgets 2.0 MDI Demo\n"
 257                        "Author: Julian Smart (c) 1997\n"
 258                        "Usage: mdi.exe", "About MDI Demo");
 259 }
 260
 261 void MyFrame::OnNewWindow(wxCommandEvent& WXUNUSED(event) )
 262 {
 263     // create and show another child frame
 264     MyChild *subframe = new MyChild(this);
 265     subframe->Show(true);
 266 }
 267
 268 void MyFrame::OnFullScreen(wxCommandEvent& event)
 269 {
 270     ShowFullScreen(event.IsChecked());
 271 }
 272
 273 void MyFrame::OnCloseAll(wxCommandEvent& WXUNUSED(event))
 274 {
 275     for ( wxWindowList::const_iterator i = GetChildren().begin();
 276           i != GetChildren().end();
 277           ++i )
 278     {
 279         if ( wxDynamicCast(*i, wxMDIChildFrame) )
 280             (*i)->Close();
 281     }
 282 }
 283
 284 void MyFrame::OnSize(wxSizeEvent& event)
 285 {
 286     int w, h;
 287     GetClientSize(&w, &h);
 288
 289     m_textWindow->SetSize(0, 0, 200, h);
 290     GetClientWindow()->SetSize(200, 0, w - 200, h);
 291
 292     // FIXME: On wxX11, we need the MDI frame to process this
 293     // event, but on other platforms this should not
 294     // be done.
 295 #ifdef __WXUNIVERSAL__
 296     event.Skip();
 297 #else
 298     wxUnusedVar(event);
 299 #endif
 300 }
 301
 302 #if wxUSE_TOOLBAR
 303 void MyFrame::InitToolBar(wxToolBar* toolBar)
 304 {
 305     wxBitmap bitmaps[8];
 306
 307     bitmaps[0] = wxBitmap( new_xpm );
 308     bitmaps[1] = wxBitmap( open_xpm );
 309     bitmaps[2] = wxBitmap( save_xpm );
 310     bitmaps[3] = wxBitmap( copy_xpm );
 311     bitmaps[4] = wxBitmap( cut_xpm );
 312     bitmaps[5] = wxBitmap( paste_xpm );
 313     bitmaps[6] = wxBitmap( print_xpm );
 314     bitmaps[7] = wxBitmap( help_xpm );
 315
 316     toolBar->AddTool(wxID_NEW, "New", bitmaps[0], "New file");
 317     toolBar->AddTool(1, "Open", bitmaps[1], "Open file");
 318     toolBar->AddTool(2, "Save", bitmaps[2], "Save file");
 319     toolBar->AddSeparator();
 320     toolBar->AddTool(3, "Copy", bitmaps[3], "Copy");
 321     toolBar->AddTool(4, "Cut", bitmaps[4], "Cut");
 322     toolBar->AddTool(5, "Paste", bitmaps[5], "Paste");
 323     toolBar->AddSeparator();
 324     toolBar->AddTool(6, "Print", bitmaps[6], "Print");
 325     toolBar->AddSeparator();
 326     toolBar->AddTool(wxID_ABOUT, "About", bitmaps[7], "Help");
 327
 328     toolBar->Realize();
 329 }
 330 #endif // wxUSE_TOOLBAR
 331
 332 // ---------------------------------------------------------------------------
 333 // MyCanvas
 334 // ---------------------------------------------------------------------------
 335
 336 // Define a constructor for my canvas
 337 MyCanvas::MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size)
 338         : wxScrolledWindow(parent, wxID_ANY, pos, size,
 339                            wxSUNKEN_BORDER |
 340                            wxNO_FULL_REPAINT_ON_RESIZE |
 341                            wxVSCROLL | wxHSCROLL)
 342 {
 343     SetBackgroundColour(wxColour("WHITE"));
 344     SetCursor(wxCursor(wxCURSOR_PENCIL));
 345
 346     SetScrollbars(20, 20, 50, 50);
 347
 348     m_dirty = false;
 349 }
 350
 351 // Define the repainting behaviour
 352 void MyCanvas::OnDraw(wxDC& dc)
 353 {
 354     if ( !m_text.empty() )
 355         dc.DrawText(m_text, 10, 10);
 356
 357     dc.SetFont(*wxSWISS_FONT);
 358     dc.SetPen(*wxGREEN_PEN);
 359     dc.DrawLine(0, 0, 200, 200);
 360     dc.DrawLine(200, 0, 0, 200);
 361
 362     dc.SetBrush(*wxCYAN_BRUSH);
 363     dc.SetPen(*wxRED_PEN);
 364     dc.DrawRectangle(100, 100, 100, 50);
 365     dc.DrawRoundedRectangle(150, 150, 100, 50, 20);
 366
 367     dc.DrawEllipse(250, 250, 100, 50);
 368 #if wxUSE_SPLINES
 369     dc.DrawSpline(50, 200, 50, 100, 200, 10);
 370 #endif // wxUSE_SPLINES
 371     dc.DrawLine(50, 230, 200, 230);
 372     dc.DrawText("This is a test string", 50, 230);
 373
 374     wxPoint points[3];
 375     points[0].x = 200; points[0].y = 300;
 376     points[1].x = 100; points[1].y = 400;
 377     points[2].x = 300; points[2].y = 400;
 378
 379     dc.DrawPolygon(3, points);
 380 }
 381
 382 // This implements a tiny doodling program! Drag the mouse using the left
 383 // button.
 384 void MyCanvas::OnEvent(wxMouseEvent& event)
 385 {
 386     wxClientDC dc(this);
 387     PrepareDC(dc);
 388
 389     wxPoint pt(event.GetLogicalPosition(dc));
 390
 391     static long xpos = -1;
 392     static long ypos = -1;
 393
 394     if (xpos > -1 && ypos > -1 && event.Dragging())
 395     {
 396         dc.SetPen(*wxBLACK_PEN);
 397         dc.DrawLine(xpos, ypos, pt.x, pt.y);
 398
 399         m_dirty = true;
 400     }
 401
 402     xpos = pt.x;
 403     ypos = pt.y;
 404 }
 405
 406 // ---------------------------------------------------------------------------
 407 // MyChild
 408 // ---------------------------------------------------------------------------
 409
 410 unsigned MyChild::ms_numChildren = 0;
 411
 412 MyChild::MyChild(wxMDIParentFrame *parent)
 413        : wxMDIChildFrame
 414          (
 415             parent,
 416             wxID_ANY,
 417             wxString::Format("Child %u", ++ms_numChildren)
 418          )
 419 {
 420     m_canvas = new MyCanvas(this, wxPoint(0, 0), GetClientSize());
 421
 422     SetIcon(wxICON(chart));
 423
 424     const bool canBeResized = !IsAlwaysMaximized();
 425
 426     // create our menu bar: it will be shown instead of the main frame one when
 427     // we're active
 428 #if wxUSE_MENUS
 429     wxMenuBar *mbar = MyFrame::CreateMainMenubar();
 430     mbar->GetMenu(0)->Insert(1, wxID_CLOSE, "&Close child\tCtrl-W",
 431                              "Close this window");
 432
 433     wxMenu *menuChild = new wxMenu;
 434
 435     menuChild->Append(MDI_REFRESH, "&Refresh picture");
 436     menuChild->Append(MDI_CHANGE_TITLE, "Change &title...\tCtrl-T");
 437     if ( canBeResized )
 438     {
 439         menuChild->AppendSeparator();
 440         menuChild->Append(MDI_CHANGE_POSITION, "Move frame\tCtrl-M");
 441         menuChild->Append(MDI_CHANGE_SIZE, "Resize frame\tCtrl-S");
 442     }
 443 #if wxUSE_CLIPBOARD
 444     menuChild->AppendSeparator();
 445     menuChild->Append(wxID_PASTE, "Copy text from clipboard\tCtrl-V");
 446 #endif // wxUSE_CLIPBOARD
 447
 448     mbar->Insert(1, menuChild, "&Child");
 449
 450     // Associate the menu bar with the frame
 451     SetMenuBar(mbar);
 452 #endif // wxUSE_MENUS
 453
 454     // this should work for MDI frames as well as for normal ones, provided
 455     // they can be resized at all
 456     if ( canBeResized )
 457         SetSizeHints(100, 100);
 458
 459     // test that event handlers pushed on top of MDI children do work (this
 460     // used to be broken, see #11225)
 461     PushEventHandler(new EventHandler(ms_numChildren));
 462 }
 463
 464 MyChild::~MyChild()
 465 {
 466     PopEventHandler(true);
 467
 468     ms_numChildren--;
 469 }
 470
 471 void MyChild::OnClose(wxCommandEvent& WXUNUSED(event))
 472 {
 473     Close(true);
 474 }
 475
 476 void MyChild::OnRefresh(wxCommandEvent& WXUNUSED(event))
 477 {
 478     if ( m_canvas )
 479         m_canvas->Refresh();
 480 }
 481
 482 void MyChild::OnChangePosition(wxCommandEvent& WXUNUSED(event))
 483 {
 484     Move(10, 10);
 485 }
 486
 487 void MyChild::OnChangeSize(wxCommandEvent& WXUNUSED(event))
 488 {
 489     SetClientSize(100, 100);
 490 }
 491
 492 void MyChild::OnChangeTitle(wxCommandEvent& WXUNUSED(event))
 493 {
 494 #if wxUSE_TEXTDLG
 495     static wxString s_title = "Canvas Frame";
 496
 497     wxString title = wxGetTextFromUser("Enter the new title for MDI child",
 498                                        "MDI sample question",
 499                                        s_title,
 500                                        GetParent()->GetParent());
 501     if ( !title )
 502         return;
 503
 504     s_title = title;
 505     SetTitle(s_title);
 506 #endif // wxUSE_TEXTDLG
 507 }
 508
 509 void MyChild::OnActivate(wxActivateEvent& event)
 510 {
 511     if ( event.GetActive() && m_canvas )
 512         m_canvas->SetFocus();
 513 }
 514
 515 void MyChild::OnMove(wxMoveEvent& event)
 516 {
 517     // VZ: here everything is totally wrong under MSW, the positions are
 518     //     different and both wrong (pos2 is off by 2 pixels for me which seems
 519     //     to be the width of the MDI canvas border)
 520     wxPoint pos1 = event.GetPosition(),
 521             pos2 = GetPosition();
 522     wxLogStatus("position from event: (%d, %d), from frame (%d, %d)",
 523                 pos1.x, pos1.y, pos2.x, pos2.y);
 524
 525     event.Skip();
 526 }
 527
 528 void MyChild::OnSize(wxSizeEvent& event)
 529 {
 530     // VZ: under MSW the size event carries the client size (quite
 531     //     unexpectedly) *except* for the very first one which has the full
 532     //     size... what should it really be? TODO: check under wxGTK
 533     wxSize size1 = event.GetSize(),
 534            size2 = GetSize(),
 535            size3 = GetClientSize();
 536     wxLogStatus("size from event: %dx%d, from frame %dx%d, client %dx%d",
 537                 size1.x, size1.y, size2.x, size2.y, size3.x, size3.y);
 538
 539     event.Skip();
 540 }
 541
 542 void MyChild::OnCloseWindow(wxCloseEvent& event)
 543 {
 544     if ( m_canvas && m_canvas->IsDirty() )
 545     {
 546         if ( wxMessageBox("Really close?", "Please confirm",
 547                           wxICON_QUESTION | wxYES_NO) != wxYES )
 548         {
 549             event.Veto();
 550
 551             return;
 552         }
 553     }
 554
 555     event.Skip();
 556 }
 557
 558 #if wxUSE_CLIPBOARD
 559
 560 #include "wx/clipbrd.h"
 561
 562 void MyChild::OnPaste(wxCommandEvent& WXUNUSED(event))
 563 {
 564     wxClipboardLocker lock;
 565     wxTextDataObject data;
 566     m_canvas->SetText(wxTheClipboard->GetData(data)
 567                         ? data.GetText()
 568                         : wxString("No text on clipboard"));
 569 }
 570
 571 void MyChild::OnUpdatePaste(wxUpdateUIEvent& event)
 572 {
 573     wxClipboardLocker lock;
 574     event.Enable( wxTheClipboard->IsSupported(wxDF_TEXT) );
 575 }
 576
 577 #endif // wxUSE_CLIPBOARD