samples/statbar/statbar.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        statbar.cpp
   3 // Purpose:     wxStatusBar sample
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     04.02.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Vadim Zeitlin
   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 #if !wxUSE_STATUSBAR
  28     #error "You need to set wxUSE_STATUSBAR to 1 to compile this sample"
  29 #endif // wxUSE_STATUSBAR
  30
  31 // for all others, include the necessary headers
  32 #ifndef WX_PRECOMP
  33     #include "wx/app.h"
  34     #include "wx/frame.h"
  35     #include "wx/statusbr.h"
  36     #include "wx/timer.h"
  37     #include "wx/checkbox.h"
  38     #include "wx/statbmp.h"
  39     #include "wx/menu.h"
  40     #include "wx/msgdlg.h"
  41     #include "wx/textdlg.h"
  42     #include "wx/sizer.h"
  43     #include "wx/stattext.h"
  44     #include "wx/bmpbuttn.h"
  45     #include "wx/dcmemory.h"
  46 #endif
  47
  48 #include "wx/datetime.h"
  49
  50 // define this for the platforms which don't support wxBitmapButton (such as
  51 // Motif), else a wxBitmapButton will be used
  52 #ifdef __WXMOTIF__
  53 //#define USE_MDI_PARENT_FRAME 1
  54
  55 #ifdef USE_MDI_PARENT_FRAME
  56     #include "wx/mdi.h"
  57 #endif // USE_MDI_PARENT_FRAME
  58     #define USE_STATIC_BITMAP
  59 #endif
  60
  61 // ----------------------------------------------------------------------------
  62 // resources
  63 // ----------------------------------------------------------------------------
  64
  65 #ifdef USE_STATIC_BITMAP
  66     #include "green.xpm"
  67     #include "red.xpm"
  68 #endif // USE_STATIC_BITMAP
  69
  70 // ----------------------------------------------------------------------------
  71 // private classes
  72 // ----------------------------------------------------------------------------
  73
  74 // Define a new application type, each program should derive a class from wxApp
  75 class MyApp : public wxApp
  76 {
  77 public:
  78     // override base class virtuals
  79     // ----------------------------
  80
  81     // this one is called on application startup and is a good place for the app
  82     // initialization (doing it here and not in the ctor allows to have an error
  83     // return: if OnInit() returns false, the application terminates)
  84     virtual bool OnInit();
  85 };
  86
  87 // A custom status bar which contains controls, icons &c
  88 class MyStatusBar : public wxStatusBar
  89 {
  90 public:
  91     MyStatusBar(wxWindow *parent);
  92     virtual ~MyStatusBar();
  93
  94     void UpdateClock();
  95
  96     // event handlers
  97     void OnTimer(wxTimerEvent& event) { UpdateClock(); }
  98     void OnSize(wxSizeEvent& event);
  99     void OnToggleClock(wxCommandEvent& event);
 100     void OnButton(wxCommandEvent& event);
 101
 102 private:
 103     // toggle the state of the status bar controls
 104     void DoToggle();
 105
 106     wxBitmap CreateBitmapForButton(bool on = FALSE);
 107
 108     enum
 109     {
 110         Field_Text,
 111         Field_Checkbox,
 112         Field_Bitmap,
 113         Field_Clock,
 114         Field_Max
 115     };
 116
 117     wxTimer m_timer;
 118
 119     wxCheckBox *m_checkbox;
 120 #ifdef USE_STATIC_BITMAP
 121     wxStaticBitmap *m_statbmp;
 122 #else
 123     wxBitmapButton *m_statbmp;
 124 #endif
 125
 126     DECLARE_EVENT_TABLE()
 127 };
 128
 129 // Define a new frame type: this is going to be our main frame
 130 class MyFrame : public wxFrame
 131 {
 132 public:
 133     // ctor(s)
 134     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
 135 #ifdef USE_MDI_PARENT_FRAME
 136 class MyFrame : public wxMDIParentFrame
 137 #else
 138     virtual ~MyFrame();
 139 #endif
 140
 141     // event handlers (these functions should _not_ be virtual)
 142     void OnQuit(wxCommandEvent& event);
 143     void OnAbout(wxCommandEvent& event);
 144
 145     void OnSetStatusFields(wxCommandEvent& event);
 146     void OnRecreateStatusBar(wxCommandEvent& event);
 147
 148 private:
 149     enum StatBarKind
 150     {
 151         StatBar_Default,
 152         StatBar_Custom,
 153         StatBar_Max
 154     } m_statbarKind;
 155     void OnUpdateSetStatusFields(wxUpdateUIEvent& event);
 156     void OnUpdateStatusBarToggle(wxUpdateUIEvent& event);
 157     void OnStatusBarToggle(wxCommandEvent& event);
 158     void DoCreateStatusBar(StatBarKind kind);
 159
 160     wxStatusBar *m_statbarDefault;
 161     MyStatusBar *m_statbarCustom;
 162
 163     // any class wishing to process wxWindows events must use this macro
 164     DECLARE_EVENT_TABLE()
 165 };
 166
 167 // Our about dialog ith its status bar
 168 class MyAboutDialog : public wxDialog
 169 {
 170 public:
 171     MyAboutDialog(wxWindow *parent);
 172 };
 173
 174 // ----------------------------------------------------------------------------
 175 // constants
 176 // ----------------------------------------------------------------------------
 177
 178 // IDs for the controls and the menu commands
 179 enum
 180 {
 181     // menu items
 182     StatusBar_Quit = 1,
 183     StatusBar_SetFields,
 184     StatusBar_Recreate,
 185     StatusBar_About,
 186     StatusBar_Toggle,
 187     StatusBar_Checkbox = 1000
 188 };
 189
 190 static const int BITMAP_SIZE_X = 32;
 191 static const int BITMAP_SIZE_Y = 15;
 192
 193 // ----------------------------------------------------------------------------
 194 // event tables and other macros for wxWindows
 195 // ----------------------------------------------------------------------------
 196
 197 // the event tables connect the wxWindows events with the functions (event
 198 // handlers) which process them. It can be also done at run-time, but for the
 199 // simple menu events like this the static method is much simpler.
 200 #ifdef USE_MDI_PARENT_FRAME
 201 BEGIN_EVENT_TABLE(MyFrame, wxMDIParentFrame)
 202 #else
 203 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 204 #endif
 205     EVT_MENU(StatusBar_Quit,  MyFrame::OnQuit)
 206     EVT_MENU(StatusBar_SetFields, MyFrame::OnSetStatusFields)
 207     EVT_MENU(StatusBar_Recreate, MyFrame::OnRecreateStatusBar)
 208     EVT_MENU(StatusBar_About, MyFrame::OnAbout)
 209     EVT_MENU(StatusBar_Toggle, MyFrame::OnStatusBarToggle)
 210     EVT_UPDATE_UI(StatusBar_Toggle, MyFrame::OnUpdateStatusBarToggle)
 211     EVT_UPDATE_UI(StatusBar_SetFields, MyFrame::OnUpdateSetStatusFields)
 212 END_EVENT_TABLE()
 213
 214 BEGIN_EVENT_TABLE(MyStatusBar, wxStatusBar)
 215     EVT_SIZE(MyStatusBar::OnSize)
 216     EVT_CHECKBOX(StatusBar_Checkbox, MyStatusBar::OnToggleClock)
 217     EVT_BUTTON(-1, MyStatusBar::OnButton)
 218     EVT_TIMER(-1, MyStatusBar::OnTimer)
 219 END_EVENT_TABLE()
 220
 221 // Create a new application object: this macro will allow wxWindows to create
 222 // the application object during program execution (it's better than using a
 223 // static object for many reasons) and also declares the accessor function
 224 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 225 // not wxApp)
 226 IMPLEMENT_APP(MyApp)
 227
 228 // ============================================================================
 229 // implementation
 230 // ============================================================================
 231
 232 // ----------------------------------------------------------------------------
 233 // the application class
 234 // ----------------------------------------------------------------------------
 235
 236 // `Main program' equivalent: the program execution "starts" here
 237 bool MyApp::OnInit()
 238 {
 239     // create the main application window
 240     MyFrame *frame = new MyFrame("wxStatusBar sample",
 241                                  wxPoint(50, 50), wxSize(450, 340));
 242
 243     // and show it (the frames, unlike simple controls, are not shown when
 244     // created initially)
 245     frame->Show(TRUE);
 246
 247     // success: wxApp::OnRun() will be called which will enter the main message
 248     // loop and the application will run. If we returned FALSE here, the
 249     // application would exit immediately.
 250     return TRUE;
 251 }
 252
 253 // ----------------------------------------------------------------------------
 254 // main frame
 255 // ----------------------------------------------------------------------------
 256
 257 // frame constructor
 258 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 259 #ifdef USE_MDI_PARENT_FRAME
 260        : wxMDIParentFrame((wxWindow *)NULL, -1, title, pos, size)
 261 #else
 262        : wxFrame((wxWindow *)NULL, -1, title, pos, size)
 263 #endif
 264 {
 265     m_statbarDefault = NULL;
 266     m_statbarCustom = NULL;
 267
 268 #ifdef __WXMAC__
 269     // we need this in order to allow the about menu relocation, since ABOUT is
 270     // not the default id of the about menu
 271     wxApp::s_macAboutMenuItemId = StatusBar_About;
 272 #endif
 273
 274     // create a menu bar
 275     wxMenu *menuFile = new wxMenu;
 276     menuFile->Append(StatusBar_Quit, "E&xit\tAlt-X", "Quit this program");
 277
 278     wxMenu *statbarMenu = new wxMenu;
 279     statbarMenu->Append(StatusBar_SetFields, "&Set field count\tCtrl-C",
 280                         "Set the number of status bar fields");
 281     statbarMenu->Append(StatusBar_Toggle, "&Toggle Status Bar",
 282                         "Toggle the status bar display", true);
 283     statbarMenu->Append(StatusBar_Recreate, "&Recreate\tCtrl-R",
 284                         "Toggle status bar format");
 285
 286     wxMenu *helpMenu = new wxMenu;
 287     helpMenu->Append(StatusBar_About, "&About...\tCtrl-A", "Show about dialog");
 288
 289     // now append the freshly created menu to the menu bar...
 290     wxMenuBar *menuBar = new wxMenuBar();
 291     menuBar->Append(menuFile, "&File");
 292     menuBar->Append(statbarMenu, "&Status bar");
 293     menuBar->Append(helpMenu, "&Help");
 294
 295     // ... and attach this menu bar to the frame
 296     SetMenuBar(menuBar);
 297
 298     // create default status bar to start with
 299     CreateStatusBar(2);
 300     m_statbarKind = StatBar_Default;
 301     SetStatusText("Welcome to wxWindows!");
 302
 303     m_statbarDefault = GetStatusBar();
 304 }
 305
 306 MyFrame::~MyFrame()
 307 {
 308     SetStatusBar(NULL);
 309
 310     delete m_statbarDefault;
 311     delete m_statbarCustom;
 312 }
 313
 314 void MyFrame::DoCreateStatusBar(MyFrame::StatBarKind kind)
 315 {
 316     wxStatusBar *statbarOld = GetStatusBar();
 317     if ( statbarOld )
 318     {
 319         statbarOld->Hide();
 320     }
 321
 322     switch ( kind )
 323     {
 324         case StatBar_Default:
 325             SetStatusBar(m_statbarDefault);
 326             break;
 327
 328         case StatBar_Custom:
 329             if ( !m_statbarCustom )
 330             {
 331                 m_statbarCustom = new MyStatusBar(this);
 332             }
 333             SetStatusBar(m_statbarCustom);
 334             break;
 335
 336         default:
 337             wxFAIL_MSG(wxT("unknown stat bar kind"));
 338     }
 339
 340     GetStatusBar()->Show();
 341     PositionStatusBar();
 342
 343     m_statbarKind = kind;
 344 }
 345
 346 void MyFrame::OnUpdateSetStatusFields(wxUpdateUIEvent& event)
 347 {
 348     // only allow the setting of the number of status fields for the default
 349     // status bar
 350     wxStatusBar *sb = GetStatusBar();
 351     event.Enable(sb == m_statbarDefault);
 352 }
 353
 354
 355 // event handlers
 356 void MyFrame::OnSetStatusFields(wxCommandEvent& WXUNUSED(event))
 357 {
 358     wxStatusBar *sb = GetStatusBar();
 359
 360     long nFields = wxGetNumberFromUser
 361                    (
 362                     _T("Select the number of fields in the status bar"),
 363                     _T("Fields:"),
 364                     _T("wxWindows statusbar sample"),
 365                     sb->GetFieldsCount(),
 366                     1, 5,
 367                     this
 368                    );
 369
 370     // we don't check if the number changed at all on purpose: calling
 371     // SetFieldsCount() with the same number of fields should be ok
 372     if ( nFields != -1 )
 373     {
 374         static const int widthsFor2Fields[] = { 200, -1 };
 375         static const int widthsFor3Fields[] = { -1, -2, -1 };
 376         static const int widthsFor4Fields[] = { 100, -1, 100, -2, 100 };
 377
 378         static const int *widthsAll[] =
 379         {
 380             NULL,               // 1 field: default
 381             widthsFor2Fields,   // 2 fields: 1 fixed, 1 var
 382             widthsFor3Fields,   // 3 fields: 3 var
 383             widthsFor4Fields,   // 4 fields: 3 fixed, 2 vars
 384             NULL                // 5 fields: default (all have same width)
 385         };
 386
 387         const int * const widths = widthsAll[nFields - 1];
 388         sb->SetFieldsCount(nFields, widths);
 389
 390         wxString s;
 391         for ( long n = 0; n < nFields; n++ )
 392         {
 393             if ( widths )
 394             {
 395                 if ( widths[n] > 0 )
 396                     s.Printf(_T("fixed (%d)"), widths[n]);
 397                 else
 398                     s.Printf(_T("variable (*%d)"), -widths[n]);
 399             }
 400             else
 401             {
 402                 s = _T("default");
 403             }
 404
 405             SetStatusText(s, n);
 406         }
 407     }
 408     else
 409     {
 410         wxLogStatus(this, wxT("Cancelled"));
 411     }
 412 }
 413
 414 void MyFrame::OnUpdateStatusBarToggle(wxUpdateUIEvent& event)
 415 {
 416     event.Check(GetStatusBar() != 0);
 417 }
 418
 419 void MyFrame::OnStatusBarToggle(wxCommandEvent& WXUNUSED(event))
 420 {
 421     wxStatusBar *statbarOld = GetStatusBar();
 422     if ( statbarOld )
 423     {
 424         statbarOld->Hide();
 425         SetStatusBar(0);
 426     }
 427     else
 428     {
 429         DoCreateStatusBar(m_statbarKind);
 430     }
 431 #ifdef __WXMSW__
 432     // The following is a kludge suggested by Vadim Zeitlin (one of the wxWindows
 433     // authors) while we look for a proper fix..
 434 //    SendSizeEvent();
 435 #endif
 436 }
 437
 438 void MyFrame::OnRecreateStatusBar(wxCommandEvent& WXUNUSED(event))
 439 {
 440     DoCreateStatusBar(m_statbarKind == StatBar_Custom ? StatBar_Default
 441                                                       : StatBar_Custom);
 442 }
 443
 444 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 445 {
 446     // TRUE is to force the frame to close
 447     Close(TRUE);
 448 }
 449
 450 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 451 {
 452     MyAboutDialog dlg(this);
 453     dlg.ShowModal();
 454 }
 455
 456 // ----------------------------------------------------------------------------
 457 // MyAboutDialog
 458 // ----------------------------------------------------------------------------
 459
 460 MyAboutDialog::MyAboutDialog(wxWindow *parent)
 461              : wxDialog(parent, -1, wxString("About statbar"),
 462                         wxDefaultPosition, wxDefaultSize,
 463                         wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
 464 {
 465     wxStaticText *text = new wxStaticText(this, -1,
 466                                           "wxStatusBar sample\n"
 467                                           "(c) 2000 Vadim Zeitlin");
 468
 469     wxButton *btn = new wxButton(this, wxID_OK, "&Close");
 470
 471     // create the top status bar without the size grip (default style),
 472     // otherwise it looks weird
 473     wxStatusBar *statbarTop = new wxStatusBar(this, -1, 0);
 474     statbarTop->SetFieldsCount(3);
 475     statbarTop->SetStatusText("This is a top status bar", 0);
 476     statbarTop->SetStatusText("in a dialog", 1);
 477     statbarTop->SetStatusText("Great, isn't it?", 2);
 478
 479     wxStatusBar *statbarBottom = new wxStatusBar(this, -1);
 480     statbarBottom->SetFieldsCount(2);
 481     statbarBottom->SetStatusText("This is a bottom status bar", 0);
 482     statbarBottom->SetStatusText("in a dialog", 1);
 483
 484     wxBoxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
 485     sizerTop->Add(statbarTop, 0, wxGROW);
 486     sizerTop->Add(-1, 10, 1, wxGROW);
 487     sizerTop->Add(text, 0, wxCENTRE | wxRIGHT | wxLEFT, 20);
 488     sizerTop->Add(-1, 10, 1, wxGROW);
 489     sizerTop->Add(btn, 0, wxCENTRE | wxRIGHT | wxLEFT, 20);
 490     sizerTop->Add(-1, 10, 1, wxGROW);
 491     sizerTop->Add(statbarBottom, 0, wxGROW);
 492
 493     SetAutoLayout(TRUE);
 494     SetSizer(sizerTop);
 495
 496     sizerTop->Fit(this);
 497     sizerTop->SetSizeHints(this);
 498 }
 499
 500 // ----------------------------------------------------------------------------
 501 // MyStatusBar
 502 // ----------------------------------------------------------------------------
 503
 504 #ifdef __VISUALC__
 505     // 'this' : used in base member initializer list -- so what??
 506     #pragma warning(disable: 4355)
 507 #endif
 508
 509 MyStatusBar::MyStatusBar(wxWindow *parent)
 510            : wxStatusBar(parent, -1), m_timer(this), m_checkbox(NULL)
 511 {
 512     static const int widths[Field_Max] = { -1, 150, BITMAP_SIZE_X, 100 };
 513
 514     SetFieldsCount(Field_Max);
 515     SetStatusWidths(Field_Max, widths);
 516
 517     m_checkbox = new wxCheckBox(this, StatusBar_Checkbox, _T("&Toggle clock"));
 518     m_checkbox->SetValue(TRUE);
 519
 520 #ifdef USE_STATIC_BITMAP
 521     m_statbmp = new wxStaticBitmap(this, -1, wxIcon(green_xpm));
 522 #else
 523     m_statbmp = new wxBitmapButton(this, -1, CreateBitmapForButton(),
 524                                    wxDefaultPosition, wxDefaultSize,
 525                                    wxBU_EXACTFIT);
 526 #endif
 527
 528     m_timer.Start(1000);
 529
 530     SetMinHeight(BITMAP_SIZE_Y);
 531
 532     UpdateClock();
 533 }
 534
 535 #ifdef __VISUALC__
 536     #pragma warning(default: 4355)
 537 #endif
 538
 539 MyStatusBar::~MyStatusBar()
 540 {
 541     if ( m_timer.IsRunning() )
 542     {
 543         m_timer.Stop();
 544     }
 545 }
 546
 547 wxBitmap MyStatusBar::CreateBitmapForButton(bool on)
 548 {
 549     static const int BMP_BUTTON_SIZE_X = 10;
 550     static const int BMP_BUTTON_SIZE_Y = 9;
 551
 552     wxBitmap bitmap(BMP_BUTTON_SIZE_X, BMP_BUTTON_SIZE_Y);
 553     wxMemoryDC dc;
 554     dc.SelectObject(bitmap);
 555     dc.SetBrush(on ? *wxGREEN_BRUSH : *wxRED_BRUSH);
 556     dc.SetBackground(*wxLIGHT_GREY_BRUSH);
 557     dc.Clear();
 558     dc.DrawEllipse(0, 0, BMP_BUTTON_SIZE_X, BMP_BUTTON_SIZE_Y);
 559     dc.SelectObject(wxNullBitmap);
 560
 561     return bitmap;
 562 }
 563
 564 void MyStatusBar::OnSize(wxSizeEvent& event)
 565 {
 566     if ( !m_checkbox )
 567         return;
 568
 569     wxRect rect;
 570     GetFieldRect(Field_Checkbox, rect);
 571
 572     m_checkbox->SetSize(rect.x + 2, rect.y + 2, rect.width - 4, rect.height - 4);
 573
 574     GetFieldRect(Field_Bitmap, rect);
 575     wxSize size = m_statbmp->GetSize();
 576
 577     m_statbmp->Move(rect.x + (rect.width - size.x) / 2,
 578                     rect.y + (rect.height - size.y) / 2);
 579
 580     event.Skip();
 581 }
 582
 583 void MyStatusBar::OnButton(wxCommandEvent& WXUNUSED(event))
 584 {
 585     m_checkbox->SetValue(!m_checkbox->GetValue());
 586
 587     DoToggle();
 588 }
 589
 590 void MyStatusBar::OnToggleClock(wxCommandEvent& WXUNUSED(event))
 591 {
 592     DoToggle();
 593 }
 594
 595 void MyStatusBar::DoToggle()
 596 {
 597     if ( m_checkbox->GetValue() )
 598     {
 599         m_timer.Start(1000);
 600
 601 #ifdef USE_STATIC_BITMAP
 602         m_statbmp->SetIcon(wxIcon(green_xpm));
 603 #else
 604         m_statbmp->SetBitmapLabel(CreateBitmapForButton(FALSE));
 605         m_statbmp->Refresh();
 606 #endif
 607
 608         UpdateClock();
 609     }
 610     else // don't show clock
 611     {
 612         m_timer.Stop();
 613
 614 #ifdef USE_STATIC_BITMAP
 615         m_statbmp->SetIcon(wxIcon(red_xpm));
 616 #else
 617         m_statbmp->SetBitmapLabel(CreateBitmapForButton(TRUE));
 618         m_statbmp->Refresh();
 619 #endif
 620
 621         SetStatusText("", Field_Clock);
 622     }
 623 }
 624
 625 void MyStatusBar::UpdateClock()
 626 {
 627     SetStatusText(wxDateTime::Now().FormatTime(), Field_Clock);
 628 }