samples/htlbox/htlbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        htmllbox.cpp
   3 // Purpose:     HtmlLbox wxWidgets sample
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     31.05.03
   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
  28 #ifndef WX_PRECOMP
  29     #include "wx/app.h"
  30     #include "wx/frame.h"
  31     #include "wx/log.h"
  32     #include "wx/textdlg.h"
  33     #include "wx/sizer.h"
  34
  35     #include "wx/menu.h"
  36     #include "wx/msgdlg.h"
  37     #include "wx/textctrl.h"
  38
  39     #include "wx/dc.h"
  40     #include "wx/icon.h"
  41 #endif
  42
  43 #include "wx/colordlg.h"
  44 #include "wx/numdlg.h"
  45
  46 #include "wx/htmllbox.h"
  47
  48 // you can also have a file containing HTML strings for testing, enable this if
  49 // you want to use it
  50 //#define USE_HTML_FILE
  51 #ifdef USE_HTML_FILE
  52     #include "wx/textfile.h"
  53 #endif
  54
  55 #include "../sample.xpm"
  56
  57 // ----------------------------------------------------------------------------
  58 // private classes
  59 // ----------------------------------------------------------------------------
  60
  61 // to use wxHtmlListBox you must derive a new class from it as you must
  62 // implement pure virtual OnGetItem()
  63 class MyHtmlListBox : public wxHtmlListBox
  64 {
  65 public:
  66     MyHtmlListBox(wxWindow *parent, bool multi = false);
  67
  68     void SetChangeSelFg(bool change) { m_change = change; }
  69     void UpdateFirstItem();
  70
  71 protected:
  72     // override this method to return data to be shown in the listbox (this is
  73     // mandatory)
  74     virtual wxString OnGetItem(size_t n) const;
  75
  76     // change the appearance by overriding these functions (this is optional)
  77     virtual void OnDrawSeparator(wxDC& dc, wxRect& rect, size_t n) const;
  78     virtual wxColour GetSelectedTextColour(const wxColour& colFg) const;
  79
  80     // override this method to handle mouse clicks
  81     virtual void OnLinkClicked(size_t n, const wxHtmlLinkInfo& link);
  82
  83     // flag telling us whether we should use fg colour even for the selected
  84     // item
  85     bool m_change;
  86
  87     // flag which we toggle to update the first items text in OnGetItem()
  88     bool m_firstItemUpdated;
  89
  90     // flag which we toggle when the user clicks on the link in 2nd item
  91     // to change 2nd item's text
  92     bool m_linkClicked;
  93
  94
  95 #ifdef USE_HTML_FILE
  96     wxTextFile m_file;
  97 #endif
  98
  99     DECLARE_NO_COPY_CLASS(MyHtmlListBox)
 100 };
 101
 102 class MyFrame : public wxFrame
 103 {
 104 public:
 105     MyFrame();
 106     virtual ~MyFrame();
 107
 108     // event handlers
 109     void OnQuit(wxCommandEvent& event);
 110     void OnAbout(wxCommandEvent& event);
 111
 112     void OnSetMargins(wxCommandEvent& event);
 113     void OnDrawSeparator(wxCommandEvent&) { m_hlbox->RefreshAll(); }
 114     void OnToggleMulti(wxCommandEvent& event);
 115     void OnSelectAll(wxCommandEvent& event);
 116     void OnUpdateItem(wxCommandEvent& event);
 117
 118     void OnSetBgCol(wxCommandEvent& event);
 119     void OnSetSelBgCol(wxCommandEvent& event);
 120     void OnSetSelFgCol(wxCommandEvent& event);
 121
 122
 123     void OnUpdateUISelectAll(wxUpdateUIEvent& event);
 124
 125     void OnLboxSelect(wxCommandEvent& event);
 126     void OnLboxDClick(wxCommandEvent& event)
 127     {
 128         wxLogMessage(_T("Listbox item %ld double clicked."), event.GetInt());
 129     }
 130
 131 private:
 132     MyHtmlListBox *m_hlbox;
 133
 134     // any class wishing to process wxWidgets events must use this macro
 135     DECLARE_EVENT_TABLE()
 136 };
 137
 138 class MyApp : public wxApp
 139 {
 140 public:
 141     virtual bool OnInit() { (new MyFrame())->Show(); return true; }
 142 };
 143
 144 // ----------------------------------------------------------------------------
 145 // constants
 146 // ----------------------------------------------------------------------------
 147
 148 // IDs for the controls and the menu commands
 149 enum
 150 {
 151     // menu items
 152     HtmlLbox_Quit = 1,
 153
 154     HtmlLbox_SetMargins,
 155     HtmlLbox_DrawSeparator,
 156     HtmlLbox_ToggleMulti,
 157     HtmlLbox_SelectAll,
 158     HtmlLbox_UpdateItem,
 159
 160     HtmlLbox_SetBgCol,
 161     HtmlLbox_SetSelBgCol,
 162     HtmlLbox_SetSelFgCol,
 163
 164     // it is important for the id corresponding to the "About" command to have
 165     // this standard value as otherwise it won't be handled properly under Mac
 166     // (where it is special and put into the "Apple" menu)
 167     HtmlLbox_About = wxID_ABOUT
 168 };
 169
 170 // ----------------------------------------------------------------------------
 171 // event tables and other macros for wxWidgets
 172 // ----------------------------------------------------------------------------
 173
 174 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 175     EVT_MENU(HtmlLbox_Quit,  MyFrame::OnQuit)
 176
 177     EVT_MENU(HtmlLbox_SetMargins, MyFrame::OnSetMargins)
 178     EVT_MENU(HtmlLbox_DrawSeparator, MyFrame::OnDrawSeparator)
 179     EVT_MENU(HtmlLbox_ToggleMulti, MyFrame::OnToggleMulti)
 180     EVT_MENU(HtmlLbox_SelectAll, MyFrame::OnSelectAll)
 181     EVT_MENU(HtmlLbox_UpdateItem, MyFrame::OnUpdateItem)
 182
 183     EVT_MENU(HtmlLbox_About, MyFrame::OnAbout)
 184
 185     EVT_MENU(HtmlLbox_SetBgCol, MyFrame::OnSetBgCol)
 186     EVT_MENU(HtmlLbox_SetSelBgCol, MyFrame::OnSetSelBgCol)
 187     EVT_MENU(HtmlLbox_SetSelFgCol, MyFrame::OnSetSelFgCol)
 188
 189     EVT_UPDATE_UI(HtmlLbox_SelectAll, MyFrame::OnUpdateUISelectAll)
 190
 191
 192     EVT_LISTBOX(wxID_ANY, MyFrame::OnLboxSelect)
 193     EVT_LISTBOX_DCLICK(wxID_ANY, MyFrame::OnLboxDClick)
 194 END_EVENT_TABLE()
 195
 196 IMPLEMENT_APP(MyApp)
 197
 198 // ============================================================================
 199 // MyFrame
 200 // ============================================================================
 201
 202 // ----------------------------------------------------------------------------
 203 // MyFrame ctor/dtor
 204 // ----------------------------------------------------------------------------
 205
 206 // frame constructor
 207 MyFrame::MyFrame()
 208        : wxFrame(NULL, wxID_ANY, _T("HtmlLbox wxWidgets Sample"),
 209                  wxDefaultPosition, wxSize(400, 500))
 210 {
 211     // set the frame icon
 212     SetIcon(wxIcon(sample_xpm));
 213
 214 #if wxUSE_MENUS
 215     // create a menu bar
 216     wxMenu *menuFile = new wxMenu;
 217     menuFile->Append(HtmlLbox_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
 218
 219     // create our specific menu
 220     wxMenu *menuHLbox = new wxMenu;
 221     menuHLbox->Append(HtmlLbox_SetMargins,
 222                       _T("Set &margins...\tCtrl-G"),
 223                       _T("Change the margins around the items"));
 224     menuHLbox->AppendCheckItem(HtmlLbox_DrawSeparator,
 225                                _T("&Draw separators\tCtrl-D"),
 226                                _T("Toggle drawing separators between cells"));
 227     menuHLbox->AppendSeparator();
 228     menuHLbox->AppendCheckItem(HtmlLbox_ToggleMulti,
 229                                _T("&Multiple selection\tCtrl-M"),
 230                                _T("Toggle multiple selection on/off"));
 231     menuHLbox->AppendSeparator();
 232     menuHLbox->Append(HtmlLbox_SelectAll, _T("Select &all items\tCtrl-A"));
 233     menuHLbox->Append(HtmlLbox_UpdateItem, _T("Update &first item\tCtrl-U"));
 234     menuHLbox->AppendSeparator();
 235     menuHLbox->Append(HtmlLbox_SetBgCol, _T("Set &background...\tCtrl-B"));
 236     menuHLbox->Append(HtmlLbox_SetSelBgCol,
 237                       _T("Set &selection background...\tCtrl-S"));
 238     menuHLbox->AppendCheckItem(HtmlLbox_SetSelFgCol,
 239                                _T("Keep &foreground in selection\tCtrl-F"));
 240
 241     // the "About" item should be in the help menu
 242     wxMenu *helpMenu = new wxMenu;
 243     helpMenu->Append(HtmlLbox_About, _T("&About...\tF1"), _T("Show about dialog"));
 244
 245     // now append the freshly created menu to the menu bar...
 246     wxMenuBar *menuBar = new wxMenuBar();
 247     menuBar->Append(menuFile, _T("&File"));
 248     menuBar->Append(menuHLbox, _T("&Listbox"));
 249     menuBar->Append(helpMenu, _T("&Help"));
 250
 251     menuBar->Check(HtmlLbox_DrawSeparator, true);
 252
 253     // ... and attach this menu bar to the frame
 254     SetMenuBar(menuBar);
 255 #endif // wxUSE_MENUS
 256
 257 #if wxUSE_STATUSBAR
 258     // create a status bar just for fun (by default with 1 pane only)
 259     CreateStatusBar(2);
 260     SetStatusText(_T("Welcome to wxWidgets!"));
 261 #endif // wxUSE_STATUSBAR
 262
 263     // create the child controls
 264     m_hlbox = new MyHtmlListBox(this);
 265     wxTextCtrl *text = new wxTextCtrl(this, wxID_ANY, _T(""),
 266                                       wxDefaultPosition, wxDefaultSize,
 267                                       wxTE_MULTILINE);
 268     delete wxLog::SetActiveTarget(new wxLogTextCtrl(text));
 269
 270     // and lay them out
 271     wxSizer *sizer = new wxBoxSizer(wxHORIZONTAL);
 272     sizer->Add(m_hlbox, 1, wxGROW);
 273     sizer->Add(text, 1, wxGROW);
 274
 275     SetSizer(sizer);
 276 }
 277
 278 MyFrame::~MyFrame()
 279 {
 280     delete wxLog::SetActiveTarget(NULL);
 281 }
 282
 283 // ----------------------------------------------------------------------------
 284 // menu event handlers
 285 // ----------------------------------------------------------------------------
 286
 287 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 288 {
 289     // true is to force the frame to close
 290     Close(true);
 291 }
 292
 293 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 294 {
 295     wxMessageBox(_T("This sample shows wxHtmlListBox class.\n")
 296                  _T("\n")
 297                  _T("(c) 2003 Vadim Zeitlin"),
 298                  _T("About HtmlLbox"),
 299                  wxOK | wxICON_INFORMATION,
 300                  this);
 301 }
 302
 303 void MyFrame::OnSetMargins(wxCommandEvent& WXUNUSED(event))
 304 {
 305     long margin = wxGetNumberFromUser
 306                   (
 307                     _T("Enter the margins to use for the listbox items."),
 308                     _T("Margin: "),
 309                     _T("HtmlLbox: Set the margins"),
 310                     0, 0, 20,
 311                     this
 312                   );
 313
 314     if ( margin != -1 )
 315     {
 316         m_hlbox->SetMargins(margin, margin);
 317         m_hlbox->RefreshAll();
 318     }
 319 }
 320
 321 void MyFrame::OnToggleMulti(wxCommandEvent& event)
 322 {
 323     // we need to recreate the listbox
 324     wxSizer *sizer = GetSizer();
 325     sizer->Detach(m_hlbox);
 326     delete m_hlbox;
 327
 328     m_hlbox = new MyHtmlListBox(this, event.IsChecked());
 329     sizer->Prepend(m_hlbox, 1, wxGROW);
 330
 331     sizer->Layout();
 332 }
 333
 334 void MyFrame::OnSelectAll(wxCommandEvent& WXUNUSED(event))
 335 {
 336     m_hlbox->SelectAll();
 337 }
 338
 339 void MyFrame::OnUpdateUISelectAll(wxUpdateUIEvent& event)
 340 {
 341     event.Enable( m_hlbox && m_hlbox->HasMultipleSelection() );
 342 }
 343
 344 void MyFrame::OnUpdateItem(wxCommandEvent& WXUNUSED(event))
 345 {
 346     m_hlbox->UpdateFirstItem();
 347 }
 348
 349 void MyFrame::OnSetBgCol(wxCommandEvent& WXUNUSED(event))
 350 {
 351     wxColour col = wxGetColourFromUser(this, m_hlbox->GetBackgroundColour());
 352     if ( col.Ok() )
 353     {
 354         m_hlbox->SetBackgroundColour(col);
 355         m_hlbox->Refresh();
 356
 357 #if wxUSE_STATUSBAR
 358         SetStatusText(_T("Background colour changed."));
 359 #endif // wxUSE_STATUSBAR
 360     }
 361 }
 362
 363 void MyFrame::OnSetSelBgCol(wxCommandEvent& WXUNUSED(event))
 364 {
 365     wxColour col = wxGetColourFromUser(this, m_hlbox->GetSelectionBackground());
 366     if ( col.Ok() )
 367     {
 368         m_hlbox->SetSelectionBackground(col);
 369         m_hlbox->Refresh();
 370
 371 #if wxUSE_STATUSBAR
 372         SetStatusText(_T("Selection background colour changed."));
 373 #endif // wxUSE_STATUSBAR
 374     }
 375 }
 376
 377 void MyFrame::OnSetSelFgCol(wxCommandEvent& event)
 378 {
 379     m_hlbox->SetChangeSelFg(!event.IsChecked());
 380     m_hlbox->Refresh();
 381 }
 382
 383 // ----------------------------------------------------------------------------
 384 // listbox event handlers
 385 // ----------------------------------------------------------------------------
 386
 387 void MyFrame::OnLboxSelect(wxCommandEvent& event)
 388 {
 389     wxLogMessage(_T("Listbox selection is now %ld."), event.GetInt());
 390
 391     if ( m_hlbox->HasMultipleSelection() )
 392     {
 393         wxString s;
 394
 395         bool first = true;
 396         unsigned long cookie;
 397         for ( int item = m_hlbox->GetFirstSelected(cookie);
 398               item != wxNOT_FOUND;
 399               item = m_hlbox->GetNextSelected(cookie) )
 400         {
 401             if ( first )
 402                 first = false;
 403             else
 404                 s << _T(", ");
 405
 406             s << item;
 407         }
 408
 409         if ( !s.empty() )
 410             wxLogMessage(_T("Selected items: %s"), s.c_str());
 411     }
 412
 413 #if wxUSE_STATUSBAR
 414     SetStatusText(wxString::Format(
 415                     _T("# items selected = %lu"),
 416                     (unsigned long)m_hlbox->GetSelectedCount()
 417                   ));
 418 #endif // wxUSE_STATUSBAR
 419 }
 420
 421 // ============================================================================
 422 // MyHtmlListBox
 423 // ============================================================================
 424
 425 MyHtmlListBox::MyHtmlListBox(wxWindow *parent, bool multi)
 426              : wxHtmlListBox(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize,
 427                              multi ? wxLB_MULTIPLE : 0)
 428 {
 429     m_change = true;
 430     m_firstItemUpdated = false;
 431     m_linkClicked = false;
 432
 433
 434     SetMargins(5, 5);
 435
 436 #ifdef USE_HTML_FILE
 437     if ( !m_file.Open(_T("results")) )
 438     {
 439         wxLogError(_T("Failed to open results file"));
 440     }
 441     else
 442     {
 443         SetItemCount(m_file.GetLineCount());
 444     }
 445 #else
 446     SetItemCount(1000);
 447 #endif
 448
 449     SetSelection(3);
 450 }
 451
 452 void MyHtmlListBox::OnDrawSeparator(wxDC& dc, wxRect& rect, size_t) const
 453 {
 454     if ( ((MyFrame *)GetParent())->
 455             GetMenuBar()->IsChecked(HtmlLbox_DrawSeparator) )
 456     {
 457         dc.SetPen(*wxBLACK_DASHED_PEN);
 458         dc.DrawLine(rect.x, rect.y, rect.GetRight(), rect.y);
 459         dc.DrawLine(rect.x, rect.GetBottom(), rect.GetRight(), rect.GetBottom());
 460     }
 461 }
 462
 463 wxString MyHtmlListBox::OnGetItem(size_t n) const
 464 {
 465     if ( !n && m_firstItemUpdated )
 466     {
 467         return wxString::Format(_T("<h1><b>Just updated</b></h1>"));
 468     }
 469
 470 #ifdef USE_HTML_FILE
 471     wxString s;
 472     if ( m_file.IsOpened() )
 473         s = m_file[n];
 474
 475     return s;
 476 #else
 477     int level = n % 6 + 1;
 478     wxString label = wxString::Format(_T("<h%d><font color=#%2x%2x%2x>")
 479                                       _T("Item</font> <b>%lu</b>")
 480                                       _T("</h%d>"),
 481                                       level,
 482                                       abs((int)n - 192) % 256,
 483                                       abs((int)n - 256) % 256,
 484                                       abs((int)n - 128) % 256,
 485                                       (unsigned long)n, level);
 486     if ( n == 1 )
 487     {
 488         if ( !m_linkClicked )
 489             label += _T("<a href='1'>Click here...</a>");
 490         else
 491             label += _T("<font color='#9999ff'>Clicked here...</font>");
 492     }
 493
 494     return label;
 495 #endif
 496 }
 497
 498 wxColour MyHtmlListBox::GetSelectedTextColour(const wxColour& colFg) const
 499 {
 500     return m_change ? wxHtmlListBox::GetSelectedTextColour(colFg) : colFg;
 501 }
 502
 503 void MyHtmlListBox::UpdateFirstItem()
 504 {
 505     m_firstItemUpdated = !m_firstItemUpdated;
 506
 507     RefreshLine(0);
 508 }
 509
 510 void MyHtmlListBox::OnLinkClicked(size_t WXUNUSED(n),
 511                                   const wxHtmlLinkInfo& WXUNUSED(link))
 512 {
 513     m_linkClicked = true;
 514
 515     RefreshLine(1);
 516 }