samples/vscroll/vstest.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        samples/vscroll/vstest.cpp
   3 // Purpose:     VScroll wxWidgets sample
   4 // Author:      Vadim Zeitlin
   5 // Modified by: Brad Anderson
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org>
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx/wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 // for all others, include the necessary headers (this file is usually all you
  28 // need because it includes almost all "standard" wxWidgets headers)
  29 #ifndef WX_PRECOMP
  30     #include "wx/wx.h"
  31     #include "wx/app.h"
  32     #include "wx/frame.h"
  33 #endif
  34
  35 // we need to include the headers not included from wx/wx.h explicitly anyhow
  36 #include "wx/vscroll.h"
  37
  38 // ----------------------------------------------------------------------------
  39 // resources
  40 // ----------------------------------------------------------------------------
  41
  42 // the application icon (under Windows and OS/2 it is in resources)
  43 #ifndef wxHAS_IMAGES_IN_RESOURCES
  44     #include "../sample.xpm"
  45 #endif
  46
  47 // ----------------------------------------------------------------------------
  48 // definitions
  49 // ----------------------------------------------------------------------------
  50
  51 #define MAX_LINES 10000
  52
  53 // ----------------------------------------------------------------------------
  54 // private classes
  55 // ----------------------------------------------------------------------------
  56
  57 // Define a new application type, each program should derive a class from wxApp
  58 class VarScrollApp : public wxApp
  59 {
  60 public:
  61     // create our main window
  62     virtual bool OnInit();
  63 };
  64
  65 // Define a new frame type: this is going to be our main frame
  66 class VarScrollFrame : public wxFrame
  67 {
  68 public:
  69     // ctor
  70     VarScrollFrame();
  71
  72     // event handlers (these functions should _not_ be virtual)
  73     void OnQuit(wxCommandEvent& event);
  74     void OnModeVScroll(wxCommandEvent& event);
  75     void OnModeHScroll(wxCommandEvent& event);
  76     void OnModeHVScroll(wxCommandEvent& event);
  77     void OnAbout(wxCommandEvent& event);
  78
  79     void OnSize(wxSizeEvent& event)
  80     {
  81         // show current size in the status bar
  82 #if wxUSE_STATUSBAR
  83         if ( m_frameStatusBar )
  84         {
  85             wxSize sz = GetClientSize();
  86             SetStatusText(wxString::Format(wxT("%dx%d"), sz.x, sz.y), 1);
  87         }
  88 #endif // wxUSE_STATUSBAR
  89
  90         event.Skip();
  91     }
  92
  93 private:
  94     // either a wxVScrolledWindow or a wxHVScrolled window, depending on current mode
  95     wxPanel *m_scrollWindow;
  96
  97     // any class wishing to process wxWidgets events must use this macro
  98     DECLARE_EVENT_TABLE()
  99 };
 100
 101 class VScrollWindow : public wxVScrolledWindow
 102 {
 103 public:
 104     VScrollWindow(wxFrame *frame) : wxVScrolledWindow(frame, wxID_ANY)
 105     {
 106         m_frame = frame;
 107
 108         SetRowCount(MAX_LINES);
 109
 110         int i;
 111         for ( i = 0; i < MAX_LINES; ++i )
 112             m_heights[i] = rand()%25+16; // low: 16; high: 40
 113
 114         m_changed = true;
 115     }
 116
 117     void OnIdle(wxIdleEvent&)
 118     {
 119 #if wxUSE_STATUSBAR
 120         m_frame->SetStatusText(wxString::Format
 121                                (
 122                                     wxT("Page size = %d, pos = %d, max = %d"),
 123                                     GetScrollThumb(wxVERTICAL),
 124                                     GetScrollPos(wxVERTICAL),
 125                                     GetScrollRange(wxVERTICAL)
 126                                ));
 127 #endif // wxUSE_STATUSBAR
 128         m_changed = false;
 129     }
 130
 131     void OnPaint(wxPaintEvent&)
 132     {
 133         wxPaintDC dc(this);
 134
 135         dc.SetPen(*wxBLACK_PEN);
 136
 137         const size_t lineFirst = GetVisibleBegin(),
 138                      lineLast = GetVisibleEnd();
 139
 140         const wxCoord hText = dc.GetCharHeight();
 141
 142         wxSize clientSize = GetClientSize();
 143
 144         wxCoord y = 0;
 145         for ( size_t line = lineFirst; line < lineLast; line++ )
 146         {
 147             dc.DrawLine(0, y, clientSize.GetWidth(), y);
 148
 149             wxCoord hLine = OnGetRowHeight(line);
 150             dc.DrawText(wxString::Format(wxT("Line %lu"), (unsigned long)line),
 151                         2, y + (hLine - hText) / 2);
 152
 153             y += hLine;
 154             dc.DrawLine(0, y, 1000, y);
 155         }
 156     }
 157
 158     void OnScroll(wxScrollWinEvent& event)
 159     {
 160         m_changed = true;
 161
 162         event.Skip();
 163     }
 164
 165     void OnMouse(wxMouseEvent& event)
 166     {
 167         if(event.LeftDown())
 168             CaptureMouse();
 169         else if(event.LeftUp())
 170             ReleaseMouse();
 171         event.Skip();
 172     }
 173
 174     virtual wxCoord OnGetRowHeight(size_t n) const
 175     {
 176         wxASSERT( n < GetRowCount() );
 177
 178         return m_heights[n];
 179     }
 180
 181 private:
 182     wxFrame *m_frame;
 183
 184     int m_heights[MAX_LINES];
 185
 186     bool m_changed;
 187
 188     DECLARE_EVENT_TABLE()
 189 };
 190
 191 BEGIN_EVENT_TABLE(VScrollWindow, wxVScrolledWindow)
 192     EVT_IDLE(VScrollWindow::OnIdle)
 193     EVT_PAINT(VScrollWindow::OnPaint)
 194     EVT_SCROLLWIN(VScrollWindow::OnScroll)
 195     EVT_MOUSE_EVENTS(VScrollWindow::OnMouse)
 196 END_EVENT_TABLE()
 197
 198 class HScrollWindow : public wxHScrolledWindow
 199 {
 200 public:
 201     HScrollWindow(wxFrame *frame) : wxHScrolledWindow(frame, wxID_ANY)
 202     {
 203         m_frame = frame;
 204
 205         SetColumnCount(MAX_LINES);
 206
 207         int i;
 208         for ( i = 0; i < MAX_LINES; ++i )
 209             m_heights[i] = rand()%25+16; // low: 15; high: 40
 210
 211         m_changed = true;
 212     }
 213
 214     void OnIdle(wxIdleEvent&)
 215     {
 216 #if wxUSE_STATUSBAR
 217         m_frame->SetStatusText(wxString::Format
 218                                (
 219                                     wxT("Page size = %d, pos = %d, max = %d"),
 220                                     GetScrollThumb(wxVERTICAL),
 221                                     GetScrollPos(wxVERTICAL),
 222                                     GetScrollRange(wxVERTICAL)
 223                                ));
 224 #endif // wxUSE_STATUSBAR
 225         m_changed = false;
 226     }
 227
 228     void OnPaint(wxPaintEvent&)
 229     {
 230         wxPaintDC dc(this);
 231
 232         dc.SetPen(*wxBLACK_PEN);
 233
 234         const size_t lineFirst = GetVisibleBegin(),
 235                      lineLast = GetVisibleEnd();
 236
 237         const wxCoord hText = dc.GetCharHeight();
 238
 239         wxSize clientSize = GetClientSize();
 240
 241         wxCoord x = 0;
 242         for ( size_t line = lineFirst; line < lineLast; line++ )
 243         {
 244             dc.DrawLine(x, 0, x, clientSize.GetHeight());
 245
 246             wxCoord wLine = OnGetColumnWidth(line);
 247             dc.DrawRotatedText(wxString::Format(wxT("Line %lu"), (unsigned long)line),
 248                                x + (wLine - hText) / 2, clientSize.GetHeight() - 5, 90);
 249
 250             x += wLine;
 251             dc.DrawLine(x, 0, x, 1000);
 252         }
 253     }
 254
 255     void OnScroll(wxScrollWinEvent& event)
 256     {
 257         m_changed = true;
 258
 259         event.Skip();
 260     }
 261
 262     void OnMouse(wxMouseEvent& event)
 263     {
 264         if(event.LeftDown())
 265             CaptureMouse();
 266         else if(event.LeftUp())
 267             ReleaseMouse();
 268         event.Skip();
 269     }
 270
 271     virtual wxCoord OnGetColumnWidth(size_t n) const
 272     {
 273         wxASSERT( n < GetColumnCount() );
 274
 275         return m_heights[n];
 276     }
 277
 278 private:
 279     wxFrame *m_frame;
 280
 281     int m_heights[MAX_LINES];
 282
 283     bool m_changed;
 284
 285     DECLARE_EVENT_TABLE()
 286 };
 287
 288 BEGIN_EVENT_TABLE(HScrollWindow, wxHScrolledWindow)
 289     EVT_IDLE(HScrollWindow::OnIdle)
 290     EVT_PAINT(HScrollWindow::OnPaint)
 291     EVT_SCROLLWIN(HScrollWindow::OnScroll)
 292     EVT_MOUSE_EVENTS(HScrollWindow::OnMouse)
 293 END_EVENT_TABLE()
 294
 295 class HVScrollWindow : public wxHVScrolledWindow
 296 {
 297 public:
 298     HVScrollWindow(wxFrame *frame) : wxHVScrolledWindow(frame, wxID_ANY)
 299     {
 300         m_frame = frame;
 301
 302         SetRowColumnCount(MAX_LINES, MAX_LINES);
 303
 304         int i;
 305         for ( i = 0; i < MAX_LINES; ++i )
 306         {
 307             m_heights[i] = rand()%30+31; // low: 30; high: 60
 308             m_widths[i] = rand()%30+61;  // low: 60; high: 90
 309         }
 310
 311         m_changed = true;
 312     }
 313
 314     void OnIdle(wxIdleEvent&)
 315     {
 316 #if wxUSE_STATUSBAR
 317         m_frame->SetStatusText(wxString::Format
 318                                (
 319                                     wxT("Page size = %d rows %d columns; pos = row: %d, column: %d; max = %d rows, %d columns"),
 320                                     GetScrollThumb(wxVERTICAL),
 321                                     GetScrollThumb(wxHORIZONTAL),
 322                                     GetScrollPos(wxVERTICAL),
 323                                     GetScrollPos(wxHORIZONTAL),
 324                                     GetScrollRange(wxVERTICAL),
 325                                     GetScrollRange(wxHORIZONTAL)
 326                                ));
 327 #endif // wxUSE_STATUSBAR
 328         m_changed = false;
 329     }
 330
 331     void OnPaint(wxPaintEvent&)
 332     {
 333         wxPaintDC dc(this);
 334
 335         dc.SetPen(*wxBLACK_PEN);
 336
 337         const size_t rowFirst = GetVisibleRowsBegin(),
 338                      rowLast = GetVisibleRowsEnd();
 339         const size_t columnFirst = GetVisibleColumnsBegin(),
 340                      columnLast = GetVisibleColumnsEnd();
 341
 342         const wxCoord hText = dc.GetCharHeight();
 343
 344         wxSize clientSize = GetClientSize();
 345
 346         wxCoord y = 0;
 347         wxCoord x = 0;
 348         for ( size_t row = rowFirst; row < rowLast; row++ )
 349         {
 350             wxCoord rowHeight = OnGetRowHeight(row);
 351             dc.DrawLine(0, y, clientSize.GetWidth(), y);
 352
 353             x = 0;
 354             for ( size_t col = columnFirst; col < columnLast; col++ )
 355             {
 356                 wxCoord colWidth = OnGetColumnWidth(col);
 357
 358                 if ( row == rowFirst )
 359                     dc.DrawLine(x, 0, x, clientSize.GetHeight());
 360
 361                 dc.DrawText(wxString::Format(wxT("Row %lu"), (unsigned long)row),
 362                             x + 2, y + rowHeight / 2 - hText);
 363                 dc.DrawText(wxString::Format(wxT("Col %lu"), (unsigned long)col),
 364                             x + 2, y + rowHeight / 2);
 365
 366                 x += colWidth;
 367                 if ( row == rowFirst)
 368                     dc.DrawLine(x, 0, x, clientSize.GetHeight());
 369             }
 370
 371             y += rowHeight;
 372             dc.DrawLine(0, y, clientSize.GetWidth(), y);
 373         }
 374     }
 375
 376     void OnScroll(wxScrollWinEvent& event)
 377     {
 378         m_changed = true;
 379
 380         event.Skip();
 381     }
 382
 383     void OnMouse(wxMouseEvent& event)
 384     {
 385         if(event.LeftDown())
 386             CaptureMouse();
 387         else if(event.LeftUp())
 388             ReleaseMouse();
 389         event.Skip();
 390     }
 391
 392     virtual wxCoord OnGetRowHeight(size_t n) const
 393     {
 394         wxASSERT( n < GetRowCount() );
 395
 396         return m_heights[n];
 397     }
 398
 399     virtual wxCoord OnGetColumnWidth(size_t n) const
 400     {
 401         wxASSERT( n < GetColumnCount() );
 402
 403         return m_widths[n];
 404     }
 405
 406 private:
 407     wxFrame *m_frame;
 408
 409     int m_heights[MAX_LINES];
 410     int m_widths[MAX_LINES];
 411
 412     bool m_changed;
 413
 414     DECLARE_EVENT_TABLE()
 415 };
 416
 417 BEGIN_EVENT_TABLE(HVScrollWindow, wxHVScrolledWindow)
 418     EVT_IDLE(HVScrollWindow::OnIdle)
 419     EVT_PAINT(HVScrollWindow::OnPaint)
 420     EVT_SCROLLWIN(HVScrollWindow::OnScroll)
 421     EVT_MOUSE_EVENTS(HVScrollWindow::OnMouse)
 422 END_EVENT_TABLE()
 423
 424 // ----------------------------------------------------------------------------
 425 // constants
 426 // ----------------------------------------------------------------------------
 427
 428 // IDs for the controls and the menu commands
 429 enum
 430 {
 431     // menu items
 432     VScroll_Quit = wxID_EXIT,
 433
 434     // it is important for the id corresponding to the "About" command to have
 435     // this standard value as otherwise it won't be handled properly under Mac
 436     // (where it is special and put into the "Apple" menu)
 437     VScroll_About = wxID_ABOUT,
 438
 439     VScroll_VScrollMode = wxID_HIGHEST + 1,
 440     VScroll_HScrollMode,
 441     VScroll_HVScrollMode
 442 };
 443
 444 // ----------------------------------------------------------------------------
 445 // event tables and other macros for wxWidgets
 446 // ----------------------------------------------------------------------------
 447
 448 // the event tables connect the wxWidgets events with the functions (event
 449 // handlers) which process them. It can be also done at run-time, but for the
 450 // simple menu events like this the static method is much simpler.
 451 BEGIN_EVENT_TABLE(VarScrollFrame, wxFrame)
 452     EVT_MENU(VScroll_Quit,  VarScrollFrame::OnQuit)
 453     EVT_MENU(VScroll_VScrollMode, VarScrollFrame::OnModeVScroll)
 454     EVT_MENU(VScroll_HScrollMode, VarScrollFrame::OnModeHScroll)
 455     EVT_MENU(VScroll_HVScrollMode, VarScrollFrame::OnModeHVScroll)
 456     EVT_MENU(VScroll_About, VarScrollFrame::OnAbout)
 457     EVT_SIZE(VarScrollFrame::OnSize)
 458 END_EVENT_TABLE()
 459
 460 // Create a new application object: this macro will allow wxWidgets to create
 461 // the application object during program execution (it's better than using a
 462 // static object for many reasons) and also declares the accessor function
 463 // wxGetApp() which will return the reference of the right type (i.e. VarScrollApp and
 464 // not wxApp)
 465 IMPLEMENT_APP(VarScrollApp)
 466
 467 // ============================================================================
 468 // implementation
 469 // ============================================================================
 470
 471 // ----------------------------------------------------------------------------
 472 // the application class
 473 // ----------------------------------------------------------------------------
 474
 475 // 'Main program' equivalent: the program execution "starts" here
 476 bool VarScrollApp::OnInit()
 477 {
 478     if ( !wxApp::OnInit() )
 479         return false;
 480
 481     // create the main application window
 482     VarScrollFrame *frame = new VarScrollFrame;
 483
 484     // and show it (the frames, unlike simple controls, are not shown when
 485     // created initially)
 486     frame->Show(true);
 487
 488     // ok
 489     return true;
 490 }
 491
 492 // ----------------------------------------------------------------------------
 493 // main frame
 494 // ----------------------------------------------------------------------------
 495
 496 // frame constructor
 497 VarScrollFrame::VarScrollFrame()
 498                : wxFrame(NULL,
 499                          wxID_ANY,
 500                          wxT("VScroll wxWidgets Sample"),
 501                          wxDefaultPosition,
 502                          wxSize(400, 350)),
 503                  m_scrollWindow(NULL)
 504 {
 505     // set the frame icon
 506     SetIcon(wxICON(sample));
 507
 508 #if wxUSE_MENUS
 509     // create a menu bar
 510     wxMenu *menuFile = new wxMenu;
 511
 512     wxMenu *menuMode = new wxMenu;
 513
 514     // the "About" item should be in the help menu
 515     wxMenu *menuHelp = new wxMenu;
 516     menuHelp->Append(VScroll_About, wxT("&About\tF1"), wxT("Show about dialog"));
 517
 518 #ifdef wxHAS_RADIO_MENU_ITEMS
 519     menuMode->AppendRadioItem(VScroll_VScrollMode, wxT("&Vertical\tAlt-V"),
 520                               wxT("Vertical scrolling only"));
 521     menuMode->AppendRadioItem(VScroll_HScrollMode, wxT("&Horizontal\tAlt-H"),
 522                               wxT("Horizontal scrolling only"));
 523     menuMode->AppendRadioItem(VScroll_HVScrollMode,
 524                               wxT("Hori&zontal/Vertical\tAlt-Z"),
 525                               wxT("Horizontal and vertical scrolling"));
 526     menuMode->Check(VScroll_VScrollMode, true);
 527 #else
 528     menuMode->Append(VScroll_VScrollMode, wxT("&Vertical\tAlt-V"),
 529                      wxT("Vertical scrolling only"));
 530     menuMode->Append(VScroll_HScrollMode, wxT("&Horizontal\tAlt-H"),
 531                      wxT("Horizontal scrolling only"));
 532     menuMode->Append(VScroll_HVScrollMode, wxT("Hori&zontal/Vertical\tAlt-Z"),
 533                      wxT("Horizontal and vertical scrolling"));
 534 #endif
 535
 536     menuFile->Append(VScroll_Quit, wxT("E&xit\tAlt-X"), wxT("Quit this program"));
 537
 538     // now append the freshly created menu to the menu bar...
 539     wxMenuBar *menuBar = new wxMenuBar;
 540     menuBar->Append(menuFile, wxT("&File"));
 541     menuBar->Append(menuMode, wxT("&Mode"));
 542     menuBar->Append(menuHelp, wxT("&Help"));
 543
 544     // ... and attach this menu bar to the frame
 545     SetMenuBar(menuBar);
 546 #endif // wxUSE_MENUS
 547
 548 #if wxUSE_STATUSBAR
 549     // create a status bar just for fun (by default with 1 pane only)
 550     CreateStatusBar(2);
 551     SetStatusText(wxT("Welcome to wxWidgets!"));
 552     int widths[2];
 553     widths[0] = -1;
 554     widths[1] = 100;
 555     SetStatusWidths(2, widths);
 556 #endif // wxUSE_STATUSBAR
 557
 558     // create our one and only child -- it will take our entire client area
 559     if ( menuMode->IsChecked(VScroll_VScrollMode) )
 560         m_scrollWindow = new VScrollWindow(this);
 561     else if ( menuMode->IsChecked(VScroll_HScrollMode) )
 562         m_scrollWindow = new HScrollWindow(this);
 563     else
 564         m_scrollWindow = new HVScrollWindow(this);
 565 }
 566
 567 // ----------------------------------------------------------------------------
 568 // event handlers
 569 // ----------------------------------------------------------------------------
 570
 571 void VarScrollFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 572 {
 573     // true is to force the frame to close
 574     Close(true);
 575 }
 576
 577 void VarScrollFrame::OnModeVScroll(wxCommandEvent& WXUNUSED(event))
 578 {
 579     if ( m_scrollWindow )
 580         m_scrollWindow->Destroy();
 581
 582     m_scrollWindow = new VScrollWindow(this);
 583     SendSizeEvent();
 584 }
 585
 586 void VarScrollFrame::OnModeHScroll(wxCommandEvent& WXUNUSED(event))
 587 {
 588     if ( m_scrollWindow )
 589         m_scrollWindow->Destroy();
 590
 591     m_scrollWindow = new HScrollWindow(this);
 592     SendSizeEvent();
 593 }
 594
 595 void VarScrollFrame::OnModeHVScroll(wxCommandEvent& WXUNUSED(event))
 596 {
 597     if ( m_scrollWindow )
 598         m_scrollWindow->Destroy();
 599
 600     m_scrollWindow = new HVScrollWindow(this);
 601     SendSizeEvent();
 602 }
 603
 604 void VarScrollFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 605 {
 606     wxMessageBox(wxT("VScroll shows how to implement scrolling with\n")
 607                  wxT("variable line widths and heights.\n")
 608                  wxT("(c) 2003 Vadim Zeitlin"),
 609                  wxT("About VScroll"),
 610                  wxOK | wxICON_INFORMATION,
 611                  this);
 612 }