| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: caret.cpp |
| 3 | // Purpose: wxCaret sample |
| 4 | // Author: Robert Roebling |
| 5 | // Modified by: |
| 6 | // Created: 04/01/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) wxWindows team |
| 9 | // Licence: wxWindows licence |
| 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 | // for all others, include the necessary headers (this file is usually all you |
| 20 | // need because it includes almost all <standard< wxWidgets headers |
| 21 | #ifndef WX_PRECOMP |
| 22 | #include "wx/wx.h" |
| 23 | #include "wx/log.h" |
| 24 | #endif |
| 25 | |
| 26 | #include "wx/caret.h" |
| 27 | #include "wx/numdlg.h" |
| 28 | |
| 29 | // ---------------------------------------------------------------------------- |
| 30 | // ressources |
| 31 | // ---------------------------------------------------------------------------- |
| 32 | // the application icon |
| 33 | #if defined(__WXGTK__) || defined(__WXX11__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__) |
| 34 | #include "mondrian.xpm" |
| 35 | #endif |
| 36 | |
| 37 | // ---------------------------------------------------------------------------- |
| 38 | // private classes |
| 39 | // ---------------------------------------------------------------------------- |
| 40 | |
| 41 | // Define a new application type, each program should derive a class from wxApp |
| 42 | class MyApp : public wxApp |
| 43 | { |
| 44 | public: |
| 45 | // override base class virtuals |
| 46 | // ---------------------------- |
| 47 | |
| 48 | // this one is called on application startup and is a good place for the app |
| 49 | // initialization (doing it here and not in the ctor allows to have an error |
| 50 | // return: if OnInit() returns false, the application terminates) |
| 51 | virtual bool OnInit(); |
| 52 | }; |
| 53 | |
| 54 | // MyCanvas is a canvas on which you can type |
| 55 | class MyCanvas: public wxScrolledWindow |
| 56 | { |
| 57 | public: |
| 58 | MyCanvas() { } |
| 59 | MyCanvas( wxWindow *parent ); |
| 60 | ~MyCanvas(); |
| 61 | |
| 62 | wxChar& CharAt(int x, int y) { return *(m_text + x + m_xChars * y); } |
| 63 | |
| 64 | // operations |
| 65 | void SetFontSize(int fontSize); |
| 66 | void CreateCaret(); |
| 67 | void MoveCaret(int x, int y); |
| 68 | |
| 69 | // caret movement |
| 70 | void Home() { m_xCaret = 0; } |
| 71 | void End() { m_xCaret = m_xChars - 1; } |
| 72 | void FirstLine() { m_yCaret = 0; } |
| 73 | void LastLine() { m_yCaret = m_yChars - 1; } |
| 74 | void PrevChar() { if ( !m_xCaret-- ) { End(); PrevLine(); } } |
| 75 | void NextChar() { if ( ++m_xCaret == m_xChars ) { Home(); NextLine(); } } |
| 76 | void PrevLine() { if ( !m_yCaret-- ) LastLine(); } |
| 77 | void NextLine() { if ( ++m_yCaret == m_yChars ) FirstLine(); } |
| 78 | |
| 79 | // event handlers |
| 80 | void OnPaint( wxPaintEvent &event ); |
| 81 | void OnSize( wxSizeEvent &event ); |
| 82 | void OnChar( wxKeyEvent &event ); |
| 83 | |
| 84 | private: |
| 85 | // move the caret to m_xCaret, m_yCaret |
| 86 | void DoMoveCaret(); |
| 87 | |
| 88 | // update the geometry |
| 89 | void ChangeSize(); |
| 90 | |
| 91 | wxFont m_font; |
| 92 | |
| 93 | // the margin around the text (looks nicer) |
| 94 | int m_xMargin, m_yMargin; |
| 95 | |
| 96 | // size (in pixels) of one character |
| 97 | long m_widthChar, m_heightChar; |
| 98 | |
| 99 | // position (in text coords) of the caret |
| 100 | int m_xCaret, m_yCaret; |
| 101 | |
| 102 | // the size (in text coords) of the window |
| 103 | int m_xChars, m_yChars; |
| 104 | |
| 105 | // the text |
| 106 | wxChar *m_text; |
| 107 | |
| 108 | DECLARE_DYNAMIC_CLASS(MyCanvas) |
| 109 | DECLARE_EVENT_TABLE() |
| 110 | }; |
| 111 | |
| 112 | |
| 113 | // Define a new frame type: this is going to be our main frame |
| 114 | class MyFrame : public wxFrame |
| 115 | { |
| 116 | public: |
| 117 | // ctor(s) |
| 118 | MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size); |
| 119 | |
| 120 | // event handlers (these functions should _not_ be virtual) |
| 121 | void OnQuit(wxCommandEvent& event); |
| 122 | void OnAbout(wxCommandEvent& event); |
| 123 | void OnSetBlinkTime(wxCommandEvent& event); |
| 124 | void OnSetFontSize(wxCommandEvent& event); |
| 125 | void OnCaretMove(wxCommandEvent& event); |
| 126 | |
| 127 | private: |
| 128 | MyCanvas *m_canvas; |
| 129 | |
| 130 | // any class wishing to process wxWidgets events must use this macro |
| 131 | DECLARE_EVENT_TABLE() |
| 132 | }; |
| 133 | |
| 134 | // ---------------------------------------------------------------------------- |
| 135 | // constants |
| 136 | // ---------------------------------------------------------------------------- |
| 137 | |
| 138 | // IDs for the controls and the menu commands |
| 139 | enum |
| 140 | { |
| 141 | // menu items |
| 142 | Caret_Quit = 1, |
| 143 | Caret_About, |
| 144 | Caret_SetBlinkTime, |
| 145 | Caret_SetFontSize, |
| 146 | Caret_Move, |
| 147 | |
| 148 | // controls start here (the numbers are, of course, arbitrary) |
| 149 | Caret_Text = 1000 |
| 150 | }; |
| 151 | |
| 152 | // ---------------------------------------------------------------------------- |
| 153 | // event tables and other macros for wxWidgets |
| 154 | // ---------------------------------------------------------------------------- |
| 155 | |
| 156 | // the event tables connect the wxWidgets events with the functions (event |
| 157 | // handlers) which process them. It can be also done at run-time, but for the |
| 158 | // simple menu events like this the static method is much simpler. |
| 159 | BEGIN_EVENT_TABLE(MyFrame, wxFrame) |
| 160 | EVT_MENU(Caret_Quit, MyFrame::OnQuit) |
| 161 | EVT_MENU(Caret_About, MyFrame::OnAbout) |
| 162 | EVT_MENU(Caret_SetBlinkTime, MyFrame::OnSetBlinkTime) |
| 163 | EVT_MENU(Caret_SetFontSize, MyFrame::OnSetFontSize) |
| 164 | EVT_MENU(Caret_Move, MyFrame::OnCaretMove) |
| 165 | END_EVENT_TABLE() |
| 166 | |
| 167 | // Create a new application object: this macro will allow wxWidgets to create |
| 168 | // the application object during program execution (it's better than using a |
| 169 | // static object for many reasons) and also declares the accessor function |
| 170 | // wxGetApp() which will return the reference of the right type (i.e. MyApp and |
| 171 | // not wxApp) |
| 172 | IMPLEMENT_APP(MyApp) |
| 173 | |
| 174 | // ============================================================================ |
| 175 | // implementation |
| 176 | // ============================================================================ |
| 177 | |
| 178 | // ---------------------------------------------------------------------------- |
| 179 | // the application class |
| 180 | // ---------------------------------------------------------------------------- |
| 181 | |
| 182 | // `Main program' equivalent: the program execution "starts" here |
| 183 | bool MyApp::OnInit() |
| 184 | { |
| 185 | // create and show the main application window |
| 186 | MyFrame *frame = new MyFrame(_T("Caret wxWidgets sample"), |
| 187 | wxPoint(50, 50), wxSize(450, 340)); |
| 188 | |
| 189 | frame->Show(true); |
| 190 | |
| 191 | // success: wxApp::OnRun() will be called which will enter the main message |
| 192 | // loop and the application will run. If we returned false here, the |
| 193 | // application would exit immediately. |
| 194 | return true; |
| 195 | } |
| 196 | |
| 197 | // ---------------------------------------------------------------------------- |
| 198 | // main frame |
| 199 | // ---------------------------------------------------------------------------- |
| 200 | |
| 201 | // frame constructor |
| 202 | MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size) |
| 203 | : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size) |
| 204 | { |
| 205 | // set the frame icon |
| 206 | SetIcon(wxICON(mondrian)); |
| 207 | |
| 208 | // create a menu bar |
| 209 | wxMenu *menuFile = new wxMenu; |
| 210 | |
| 211 | menuFile->Append(Caret_SetBlinkTime, _T("&Blink time...\tCtrl-B")); |
| 212 | menuFile->Append(Caret_SetFontSize, _T("&Font size...\tCtrl-S")); |
| 213 | menuFile->Append(Caret_Move, _T("&Move caret\tCtrl-C")); |
| 214 | menuFile->AppendSeparator(); |
| 215 | menuFile->Append(Caret_About, _T("&About...\tCtrl-A"), _T("Show about dialog")); |
| 216 | menuFile->AppendSeparator(); |
| 217 | menuFile->Append(Caret_Quit, _T("E&xit\tAlt-X"), _T("Quit this program")); |
| 218 | |
| 219 | // now append the freshly created menu to the menu bar... |
| 220 | wxMenuBar *menuBar = new wxMenuBar; |
| 221 | menuBar->Append(menuFile, _T("&File")); |
| 222 | |
| 223 | // ... and attach this menu bar to the frame |
| 224 | SetMenuBar(menuBar); |
| 225 | |
| 226 | m_canvas = new MyCanvas(this); |
| 227 | |
| 228 | #if wxUSE_STATUSBAR |
| 229 | // create a status bar just for fun (by default with 1 pane only) |
| 230 | CreateStatusBar(2); |
| 231 | SetStatusText(_T("Welcome to wxWidgets!")); |
| 232 | #endif // wxUSE_STATUSBAR |
| 233 | } |
| 234 | |
| 235 | |
| 236 | // event handlers |
| 237 | |
| 238 | void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event)) |
| 239 | { |
| 240 | // true is to force the frame to close |
| 241 | Close(true); |
| 242 | } |
| 243 | |
| 244 | void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event)) |
| 245 | { |
| 246 | wxMessageBox(_T("The caret wxWidgets sample.\n(c) 1999 Vadim Zeitlin"), |
| 247 | _T("About Caret"), wxOK | wxICON_INFORMATION, this); |
| 248 | } |
| 249 | |
| 250 | void MyFrame::OnCaretMove(wxCommandEvent& WXUNUSED(event)) |
| 251 | { |
| 252 | m_canvas->MoveCaret(10, 10); |
| 253 | } |
| 254 | |
| 255 | void MyFrame::OnSetBlinkTime(wxCommandEvent& WXUNUSED(event)) |
| 256 | { |
| 257 | long blinkTime = wxGetNumberFromUser |
| 258 | ( |
| 259 | _T("The caret blink time is the time between two blinks"), |
| 260 | _T("Time in milliseconds:"), |
| 261 | _T("wxCaret sample"), |
| 262 | wxCaret::GetBlinkTime(), 0, 10000, |
| 263 | this |
| 264 | ); |
| 265 | if ( blinkTime != -1 ) |
| 266 | { |
| 267 | wxCaret::SetBlinkTime((int)blinkTime); |
| 268 | m_canvas->CreateCaret(); |
| 269 | wxLogStatus(this, _T("Blink time set to %ld milliseconds."), blinkTime); |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | void MyFrame::OnSetFontSize(wxCommandEvent& WXUNUSED(event)) |
| 274 | { |
| 275 | long fontSize = wxGetNumberFromUser |
| 276 | ( |
| 277 | _T("The font size also determines the caret size so\nthis demonstrates resizing the caret."), |
| 278 | _T("Font size (in points):"), |
| 279 | _T("wxCaret sample"), |
| 280 | 12, 1, 100, |
| 281 | this |
| 282 | ); |
| 283 | |
| 284 | if ( fontSize != -1 ) |
| 285 | { |
| 286 | m_canvas->SetFontSize((int)fontSize); |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | // ---------------------------------------------------------------------------- |
| 291 | // MyCanvas |
| 292 | // ---------------------------------------------------------------------------- |
| 293 | |
| 294 | IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow) |
| 295 | |
| 296 | BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow) |
| 297 | EVT_PAINT(MyCanvas::OnPaint) |
| 298 | EVT_SIZE(MyCanvas::OnSize) |
| 299 | EVT_CHAR(MyCanvas::OnChar) |
| 300 | END_EVENT_TABLE() |
| 301 | |
| 302 | MyCanvas::MyCanvas( wxWindow *parent ) |
| 303 | : wxScrolledWindow( parent, wxID_ANY, |
| 304 | wxDefaultPosition, wxDefaultSize, |
| 305 | wxSUNKEN_BORDER ) |
| 306 | { |
| 307 | m_text = (wxChar *)NULL; |
| 308 | |
| 309 | SetBackgroundColour(*wxWHITE); |
| 310 | |
| 311 | SetFontSize(12); |
| 312 | |
| 313 | m_xCaret = m_yCaret = |
| 314 | m_xChars = m_yChars = 0; |
| 315 | |
| 316 | m_xMargin = m_yMargin = 5; |
| 317 | |
| 318 | CreateCaret(); |
| 319 | } |
| 320 | |
| 321 | MyCanvas::~MyCanvas() |
| 322 | { |
| 323 | free(m_text); |
| 324 | } |
| 325 | |
| 326 | void MyCanvas::CreateCaret() |
| 327 | { |
| 328 | wxCaret *caret = new wxCaret(this, m_widthChar, m_heightChar); |
| 329 | SetCaret(caret); |
| 330 | |
| 331 | caret->Move(m_xMargin, m_yMargin); |
| 332 | caret->Show(); |
| 333 | } |
| 334 | |
| 335 | void MyCanvas::SetFontSize(int fontSize) |
| 336 | { |
| 337 | m_font = wxFont(fontSize, wxFONTFAMILY_TELETYPE, |
| 338 | wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL); |
| 339 | |
| 340 | wxClientDC dc(this); |
| 341 | dc.SetFont(m_font); |
| 342 | m_heightChar = dc.GetCharHeight(); |
| 343 | m_widthChar = dc.GetCharWidth(); |
| 344 | |
| 345 | wxCaret *caret = GetCaret(); |
| 346 | if ( caret ) |
| 347 | { |
| 348 | caret->SetSize(m_widthChar, m_heightChar); |
| 349 | |
| 350 | ChangeSize(); |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | void MyCanvas::MoveCaret(int x, int y) |
| 355 | { |
| 356 | m_xCaret = x; |
| 357 | m_yCaret = y; |
| 358 | |
| 359 | DoMoveCaret(); |
| 360 | } |
| 361 | |
| 362 | void MyCanvas::DoMoveCaret() |
| 363 | { |
| 364 | wxLogStatus(_T("Caret is at (%d, %d)"), m_xCaret, m_yCaret); |
| 365 | |
| 366 | GetCaret()->Move(m_xMargin + m_xCaret * m_widthChar, |
| 367 | m_yMargin + m_yCaret * m_heightChar); |
| 368 | } |
| 369 | |
| 370 | void MyCanvas::OnSize(wxSizeEvent& event) |
| 371 | { |
| 372 | ChangeSize(); |
| 373 | |
| 374 | event.Skip(); |
| 375 | } |
| 376 | |
| 377 | void MyCanvas::ChangeSize() |
| 378 | { |
| 379 | wxSize size = GetClientSize(); |
| 380 | m_xChars = (size.x - 2*m_xMargin) / m_widthChar; |
| 381 | m_yChars = (size.y - 2*m_yMargin) / m_heightChar; |
| 382 | if ( !m_xChars ) |
| 383 | m_xChars = 1; |
| 384 | if ( !m_yChars ) |
| 385 | m_yChars = 1; |
| 386 | |
| 387 | free(m_text); |
| 388 | m_text = (wxChar *)calloc(m_xChars * m_yChars, sizeof(wxChar)); |
| 389 | |
| 390 | #if wxUSE_STATUSBAR |
| 391 | wxFrame *frame = wxDynamicCast(GetParent(), wxFrame); |
| 392 | |
| 393 | if ( frame && frame->GetStatusBar() ) |
| 394 | { |
| 395 | wxString msg; |
| 396 | msg.Printf(_T("Panel size is (%d, %d)"), m_xChars, m_yChars); |
| 397 | frame->SetStatusText(msg, 1); |
| 398 | } |
| 399 | #endif // wxUSE_STATUSBAR |
| 400 | } |
| 401 | |
| 402 | // NB: this method is horrible inefficient especially because the caret |
| 403 | // needs to be redrawn often and in this case we only have to redraw |
| 404 | // the caret location and not the entire window - in a real program we |
| 405 | // would use GetUpdateRegion() and iterate over rectangles it contains |
| 406 | void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) ) |
| 407 | { |
| 408 | wxCaretSuspend cs(this); |
| 409 | wxPaintDC dc( this ); |
| 410 | PrepareDC( dc ); |
| 411 | dc.Clear(); |
| 412 | |
| 413 | dc.SetFont( m_font ); |
| 414 | |
| 415 | for ( int y = 0; y < m_yChars; y++ ) |
| 416 | { |
| 417 | wxString line; |
| 418 | |
| 419 | for ( int x = 0; x < m_xChars; x++ ) |
| 420 | { |
| 421 | wxChar ch = CharAt(x, y); |
| 422 | if ( !ch ) |
| 423 | ch = _T(' '); |
| 424 | line += ch; |
| 425 | } |
| 426 | |
| 427 | dc.DrawText( line, m_xMargin, m_yMargin + y * m_heightChar ); |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | void MyCanvas::OnChar( wxKeyEvent &event ) |
| 432 | { |
| 433 | switch ( event.GetKeyCode() ) |
| 434 | { |
| 435 | case WXK_LEFT: |
| 436 | PrevChar(); |
| 437 | break; |
| 438 | |
| 439 | case WXK_RIGHT: |
| 440 | NextChar(); |
| 441 | break; |
| 442 | |
| 443 | case WXK_UP: |
| 444 | PrevLine(); |
| 445 | break; |
| 446 | |
| 447 | case WXK_DOWN: |
| 448 | NextLine(); |
| 449 | break; |
| 450 | |
| 451 | case WXK_HOME: |
| 452 | Home(); |
| 453 | break; |
| 454 | |
| 455 | case WXK_END: |
| 456 | End(); |
| 457 | break; |
| 458 | |
| 459 | case WXK_RETURN: |
| 460 | Home(); |
| 461 | NextLine(); |
| 462 | break; |
| 463 | |
| 464 | default: |
| 465 | if ( !event.AltDown() && wxIsprint(event.GetKeyCode()) ) |
| 466 | { |
| 467 | wxChar ch = (wxChar)event.GetKeyCode(); |
| 468 | CharAt(m_xCaret, m_yCaret) = ch; |
| 469 | |
| 470 | wxCaretSuspend cs(this); |
| 471 | wxClientDC dc(this); |
| 472 | dc.SetFont(m_font); |
| 473 | dc.SetBackgroundMode(wxSOLID); // overwrite old value |
| 474 | dc.DrawText(ch, m_xMargin + m_xCaret * m_widthChar, |
| 475 | m_yMargin + m_yCaret * m_heightChar ); |
| 476 | |
| 477 | NextChar(); |
| 478 | } |
| 479 | else |
| 480 | { |
| 481 | event.Skip(); |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | DoMoveCaret(); |
| 486 | } |
| 487 | |