| 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 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | #ifdef __GNUG__ |
| 20 | #pragma implementation "caret.cpp" |
| 21 | #pragma interface "caret.cpp" |
| 22 | #endif |
| 23 | |
| 24 | // For compilers that support precompilation, includes "wx/wx.h". |
| 25 | #include <wx/wxprec.h> |
| 26 | |
| 27 | #ifdef __BORLANDC__ |
| 28 | #pragma hdrstop |
| 29 | #endif |
| 30 | |
| 31 | // for all others, include the necessary headers (this file is usually all you |
| 32 | // need because it includes almost all <standard< wxWindows headers |
| 33 | #ifndef WX_PRECOMP |
| 34 | #include <wx/wx.h> |
| 35 | |
| 36 | #include <wx/log.h> |
| 37 | #endif |
| 38 | |
| 39 | #include "wx/caret.h" |
| 40 | |
| 41 | // ---------------------------------------------------------------------------- |
| 42 | // ressources |
| 43 | // ---------------------------------------------------------------------------- |
| 44 | // the application icon |
| 45 | #if defined(__WXGTK__) || defined(__WXMOTIF__) |
| 46 | #include "mondrian.xpm" |
| 47 | #endif |
| 48 | |
| 49 | // ---------------------------------------------------------------------------- |
| 50 | // private classes |
| 51 | // ---------------------------------------------------------------------------- |
| 52 | |
| 53 | // Define a new application type, each program should derive a class from wxApp |
| 54 | class MyApp : public wxApp |
| 55 | { |
| 56 | public: |
| 57 | // override base class virtuals |
| 58 | // ---------------------------- |
| 59 | |
| 60 | // this one is called on application startup and is a good place for the app |
| 61 | // initialization (doing it here and not in the ctor allows to have an error |
| 62 | // return: if OnInit() returns false, the application terminates) |
| 63 | virtual bool OnInit(); |
| 64 | }; |
| 65 | |
| 66 | // Define a new frame type: this is going to be our main frame |
| 67 | class MyFrame : public wxFrame |
| 68 | { |
| 69 | public: |
| 70 | // ctor(s) |
| 71 | MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size); |
| 72 | |
| 73 | // event handlers (these functions should _not_ be virtual) |
| 74 | void OnQuit(wxCommandEvent& event); |
| 75 | void OnAbout(wxCommandEvent& event); |
| 76 | |
| 77 | private: |
| 78 | // any class wishing to process wxWindows events must use this macro |
| 79 | DECLARE_EVENT_TABLE() |
| 80 | }; |
| 81 | |
| 82 | // MyCanvas is a canvas on which you can type |
| 83 | class MyCanvas: public wxScrolledWindow |
| 84 | { |
| 85 | public: |
| 86 | MyCanvas() { } |
| 87 | MyCanvas( wxWindow *parent ); |
| 88 | ~MyCanvas(); |
| 89 | |
| 90 | char& CharAt(int x, int y) { return *(m_text + x + m_xChars * y); } |
| 91 | |
| 92 | // caret movement |
| 93 | void Home() { m_xCaret = 0; } |
| 94 | void End() { m_xCaret = m_xChars - 1; } |
| 95 | void FirstLine() { m_yCaret = 0; } |
| 96 | void LastLine() { m_yCaret = m_yChars - 1; } |
| 97 | void PrevChar() { if ( !m_xCaret-- ) { End(); PrevLine(); } } |
| 98 | void NextChar() { if ( ++m_xCaret == m_xChars ) { Home(); NextLine(); } } |
| 99 | void PrevLine() { if ( !m_yCaret-- ) LastLine(); } |
| 100 | void NextLine() { if ( ++m_yCaret == m_yChars ) FirstLine(); } |
| 101 | |
| 102 | // event handlers |
| 103 | void OnPaint( wxPaintEvent &event ); |
| 104 | void OnSize( wxSizeEvent &event ); |
| 105 | void OnChar( wxKeyEvent &event ); |
| 106 | |
| 107 | private: |
| 108 | wxCaret m_caret; |
| 109 | wxFont m_font; |
| 110 | |
| 111 | // the margin around the text (looks nicer) |
| 112 | int m_xMargin, m_yMargin; |
| 113 | |
| 114 | // size (in pixels) of one character |
| 115 | long m_widthChar, m_heightChar; |
| 116 | |
| 117 | // position (in text coords) of the caret |
| 118 | int m_xCaret, m_yCaret; |
| 119 | |
| 120 | // the size (in text coords) of the window |
| 121 | int m_xChars, m_yChars; |
| 122 | |
| 123 | // the text |
| 124 | char *m_text; |
| 125 | |
| 126 | DECLARE_DYNAMIC_CLASS(MyCanvas) |
| 127 | DECLARE_EVENT_TABLE() |
| 128 | }; |
| 129 | |
| 130 | // ---------------------------------------------------------------------------- |
| 131 | // constants |
| 132 | // ---------------------------------------------------------------------------- |
| 133 | |
| 134 | // IDs for the controls and the menu commands |
| 135 | enum |
| 136 | { |
| 137 | // menu items |
| 138 | Minimal_Quit = 1, |
| 139 | Minimal_About, |
| 140 | Minimal_Test1, |
| 141 | Minimal_Test2, |
| 142 | |
| 143 | // controls start here (the numbers are, of course, arbitrary) |
| 144 | Minimal_Text = 1000, |
| 145 | }; |
| 146 | |
| 147 | // ---------------------------------------------------------------------------- |
| 148 | // event tables and other macros for wxWindows |
| 149 | // ---------------------------------------------------------------------------- |
| 150 | |
| 151 | // the event tables connect the wxWindows events with the functions (event |
| 152 | // handlers) which process them. It can be also done at run-time, but for the |
| 153 | // simple menu events like this the static method is much simpler. |
| 154 | BEGIN_EVENT_TABLE(MyFrame, wxFrame) |
| 155 | EVT_MENU(Minimal_Quit, MyFrame::OnQuit) |
| 156 | EVT_MENU(Minimal_About, MyFrame::OnAbout) |
| 157 | END_EVENT_TABLE() |
| 158 | |
| 159 | // Create a new application object: this macro will allow wxWindows to create |
| 160 | // the application object during program execution (it's better than using a |
| 161 | // static object for many reasons) and also declares the accessor function |
| 162 | // wxGetApp() which will return the reference of the right type (i.e. MyApp and |
| 163 | // not wxApp) |
| 164 | IMPLEMENT_APP(MyApp) |
| 165 | |
| 166 | // ============================================================================ |
| 167 | // implementation |
| 168 | // ============================================================================ |
| 169 | |
| 170 | // ---------------------------------------------------------------------------- |
| 171 | // the application class |
| 172 | // ---------------------------------------------------------------------------- |
| 173 | |
| 174 | // `Main program' equivalent: the program execution "starts" here |
| 175 | bool MyApp::OnInit() |
| 176 | { |
| 177 | // Create the main application window |
| 178 | MyFrame *frame = new MyFrame("Minimal wxWindows App", |
| 179 | wxPoint(50, 50), wxSize(450, 340)); |
| 180 | |
| 181 | // Show it and tell the application that it's our main window |
| 182 | // @@@ what does it do exactly, in fact? is it necessary here? |
| 183 | frame->Show(TRUE); |
| 184 | SetTopWindow(frame); |
| 185 | |
| 186 | // success: wxApp::OnRun() will be called which will enter the main message |
| 187 | // loop and the application will run. If we returned FALSE here, the |
| 188 | // application would exit immediately. |
| 189 | return TRUE; |
| 190 | } |
| 191 | |
| 192 | // ---------------------------------------------------------------------------- |
| 193 | // main frame |
| 194 | // ---------------------------------------------------------------------------- |
| 195 | |
| 196 | // frame constructor |
| 197 | MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size) |
| 198 | : wxFrame((wxFrame *)NULL, -1, title, pos, size) |
| 199 | { |
| 200 | // set the frame icon |
| 201 | SetIcon(wxICON(mondrian)); |
| 202 | |
| 203 | // create a menu bar |
| 204 | wxMenu *menuFile = new wxMenu; |
| 205 | |
| 206 | menuFile->Append(Minimal_About, "&About...\tCtrl-A", "Show about dialog"); |
| 207 | menuFile->AppendSeparator(); |
| 208 | menuFile->Append(Minimal_Quit, "E&xit\tAlt-X", "Quit this program"); |
| 209 | |
| 210 | // now append the freshly created menu to the menu bar... |
| 211 | wxMenuBar *menuBar = new wxMenuBar; |
| 212 | menuBar->Append(menuFile, "&File"); |
| 213 | |
| 214 | // ... and attach this menu bar to the frame |
| 215 | SetMenuBar(menuBar); |
| 216 | |
| 217 | (void) new MyCanvas( this ); |
| 218 | |
| 219 | // create a status bar just for fun (by default with 1 pane only) |
| 220 | CreateStatusBar(2); |
| 221 | SetStatusText("Welcome to wxWindows!"); |
| 222 | } |
| 223 | |
| 224 | |
| 225 | // event handlers |
| 226 | |
| 227 | void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event)) |
| 228 | { |
| 229 | // TRUE is to force the frame to close |
| 230 | Close(TRUE); |
| 231 | } |
| 232 | |
| 233 | void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event)) |
| 234 | { |
| 235 | wxString msg; |
| 236 | msg.Printf( _T("This is the about dialog of minimal sample.\n") |
| 237 | _T("Welcome to %s") |
| 238 | #ifdef wxBETA_NUMBER |
| 239 | _T(" (beta %d)!") |
| 240 | #endif // wxBETA_NUMBER |
| 241 | , wxVERSION_STRING |
| 242 | #ifdef wxBETA_NUMBER |
| 243 | , wxBETA_NUMBER |
| 244 | #endif // wxBETA_NUMBER |
| 245 | ); |
| 246 | |
| 247 | wxMessageBox(msg, "About Minimal", wxOK | wxICON_INFORMATION, this); |
| 248 | } |
| 249 | |
| 250 | |
| 251 | // ---------------------------------------------------------------------------- |
| 252 | // MyCanvas |
| 253 | // ---------------------------------------------------------------------------- |
| 254 | |
| 255 | IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow) |
| 256 | |
| 257 | BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow) |
| 258 | EVT_PAINT(MyCanvas::OnPaint) |
| 259 | EVT_SIZE(MyCanvas::OnSize) |
| 260 | EVT_CHAR(MyCanvas::OnChar) |
| 261 | END_EVENT_TABLE() |
| 262 | |
| 263 | MyCanvas::MyCanvas( wxWindow *parent ) |
| 264 | : wxScrolledWindow( parent, -1, |
| 265 | wxDefaultPosition, wxDefaultSize, |
| 266 | wxSUNKEN_BORDER ) |
| 267 | { |
| 268 | m_text = (char *)NULL; |
| 269 | |
| 270 | SetBackgroundColour(* wxWHITE); |
| 271 | |
| 272 | m_font = *wxNORMAL_FONT; |
| 273 | |
| 274 | wxClientDC dc(this); |
| 275 | dc.SetFont( m_font ); |
| 276 | m_heightChar = dc.GetCharHeight(); |
| 277 | m_widthChar = dc.GetCharWidth(); |
| 278 | |
| 279 | m_caret.Create( this, m_widthChar, m_heightChar ); |
| 280 | |
| 281 | m_xCaret = m_yCaret = |
| 282 | m_xChars = m_yChars = 0; |
| 283 | |
| 284 | m_xMargin = m_yMargin = 5; |
| 285 | m_caret.Move(m_xMargin, m_yMargin); |
| 286 | m_caret.Show(); |
| 287 | } |
| 288 | |
| 289 | MyCanvas::~MyCanvas() |
| 290 | { |
| 291 | free(m_text); |
| 292 | } |
| 293 | |
| 294 | void MyCanvas::OnSize( wxSizeEvent &event ) |
| 295 | { |
| 296 | m_xChars = (event.GetSize().x - 2*m_xMargin) / m_widthChar; |
| 297 | m_yChars = (event.GetSize().y - 2*m_yMargin) / m_heightChar; |
| 298 | if ( !m_xChars ) |
| 299 | m_xChars = 1; |
| 300 | if ( !m_yChars ) |
| 301 | m_yChars = 1; |
| 302 | |
| 303 | free(m_text); |
| 304 | m_text = (char *)calloc(m_xChars * m_yChars, sizeof(char)); |
| 305 | |
| 306 | wxString msg; |
| 307 | msg.Printf("Panel size is (%d, %d)", m_xChars, m_yChars); |
| 308 | |
| 309 | ((wxFrame *)GetParent())->SetStatusText(msg, 1); |
| 310 | |
| 311 | event.Skip(); |
| 312 | } |
| 313 | |
| 314 | void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) ) |
| 315 | { |
| 316 | wxPaintDC dc( this ); |
| 317 | PrepareDC( dc ); |
| 318 | |
| 319 | dc.SetFont( m_font ); |
| 320 | |
| 321 | for ( int y = 0; y < m_yChars; y++ ) |
| 322 | { |
| 323 | wxString line; |
| 324 | |
| 325 | for ( int x = 0; x < m_xChars; x++ ) |
| 326 | { |
| 327 | char ch = CharAt(x, y); |
| 328 | if ( !ch ) |
| 329 | ch = ' '; |
| 330 | line += ch; |
| 331 | } |
| 332 | |
| 333 | dc.DrawText( line, m_xMargin, m_yMargin + y * m_heightChar ); |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | void MyCanvas::OnChar( wxKeyEvent &event ) |
| 338 | { |
| 339 | switch ( event.KeyCode() ) |
| 340 | { |
| 341 | case WXK_LEFT: |
| 342 | PrevChar(); |
| 343 | break; |
| 344 | |
| 345 | case WXK_RIGHT: |
| 346 | NextChar(); |
| 347 | break; |
| 348 | |
| 349 | case WXK_UP: |
| 350 | PrevLine(); |
| 351 | break; |
| 352 | |
| 353 | case WXK_DOWN: |
| 354 | NextLine(); |
| 355 | break; |
| 356 | |
| 357 | case WXK_HOME: |
| 358 | Home(); |
| 359 | break; |
| 360 | |
| 361 | case WXK_END: |
| 362 | End(); |
| 363 | break; |
| 364 | |
| 365 | case WXK_RETURN: |
| 366 | Home(); |
| 367 | NextLine(); |
| 368 | break; |
| 369 | |
| 370 | default: |
| 371 | if ( isprint(event.KeyCode()) ) |
| 372 | { |
| 373 | CharAt(m_xCaret, m_yCaret) = (char)event.KeyCode(); |
| 374 | NextChar(); |
| 375 | } |
| 376 | else |
| 377 | { |
| 378 | // don't refresh |
| 379 | return; |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | wxLogStatus("Caret is at (%d, %d)", m_xCaret, m_yCaret); |
| 384 | |
| 385 | m_caret.Move(m_xMargin + m_xCaret * m_widthChar, |
| 386 | m_yMargin + m_yCaret * m_heightChar); |
| 387 | |
| 388 | Refresh(); |
| 389 | } |
| 390 | |