samples/widgets/button.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Program:     wxWidgets Widgets Sample
   3 // Name:        button.cpp
   4 // Purpose:     Part of the widgets sample showing wxButton
   5 // Author:      Vadim Zeitlin
   6 // Created:     10.04.01
   7 // Id:          $Id$
   8 // Copyright:   (c) 2001 Vadim Zeitlin
   9 // License:     wxWindows license
  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/log.h"
  31
  32     #include "wx/bmpbuttn.h"
  33     #include "wx/button.h"
  34     #include "wx/checkbox.h"
  35     #include "wx/radiobox.h"
  36     #include "wx/statbox.h"
  37     #include "wx/textctrl.h"
  38 #endif
  39
  40 #include "wx/artprov.h"
  41 #include "wx/sizer.h"
  42 #include "wx/dcmemory.h"
  43
  44 #include "widgets.h"
  45
  46 #include "icons/button.xpm"
  47
  48 // ----------------------------------------------------------------------------
  49 // constants
  50 // ----------------------------------------------------------------------------
  51
  52 // control ids
  53 enum
  54 {
  55     ButtonPage_Reset = 100,
  56     ButtonPage_ChangeLabel,
  57     ButtonPage_Button
  58 };
  59
  60 // radio boxes
  61 enum
  62 {
  63     ButtonHAlign_Left,
  64     ButtonHAlign_Centre,
  65     ButtonHAlign_Right
  66 };
  67
  68 enum
  69 {
  70     ButtonVAlign_Top,
  71     ButtonVAlign_Centre,
  72     ButtonVAlign_Bottom
  73 };
  74
  75 // ----------------------------------------------------------------------------
  76 // ButtonWidgetsPage
  77 // ----------------------------------------------------------------------------
  78
  79 class ButtonWidgetsPage : public WidgetsPage
  80 {
  81 public:
  82     ButtonWidgetsPage(wxBookCtrlBase *book, wxImageList *imaglist);
  83     virtual ~ButtonWidgetsPage(){};
  84
  85     virtual wxControl *GetWidget() const { return m_button; }
  86     virtual void RecreateWidget() { CreateButton(); }
  87
  88 protected:
  89     // event handlers
  90     void OnCheckOrRadioBox(wxCommandEvent& event);
  91
  92     void OnButton(wxCommandEvent& event);
  93     void OnButtonReset(wxCommandEvent& event);
  94     void OnButtonChangeLabel(wxCommandEvent& event);
  95
  96     // reset the wxButton parameters
  97     void Reset();
  98
  99     // (re)create the wxButton
 100     void CreateButton();
 101
 102     // add m_button to m_sizerButton using current value of m_chkFit
 103     void AddButtonToSizer();
 104
 105     // helper function: create a bitmap for wxBitmapButton
 106     wxBitmap CreateBitmap(const wxString& label);
 107
 108
 109     // the controls
 110     // ------------
 111
 112     // the check/radio boxes for styles
 113     wxCheckBox *m_chkBitmap,
 114                *m_chkImage,
 115                *m_chkFit,
 116                *m_chkDefault;
 117
 118     // more checkboxes for wxBitmapButton only
 119     wxCheckBox *m_chkUseSelected,
 120                *m_chkUseFocused,
 121                *m_chkUseHover,
 122                *m_chkUseDisabled;
 123
 124     wxRadioBox *m_radioHAlign,
 125                *m_radioVAlign;
 126
 127     // the button itself and the sizer it is in
 128     wxButton *m_button;
 129     wxSizer *m_sizerButton;
 130
 131     // the text entries for command parameters
 132     wxTextCtrl *m_textLabel;
 133
 134 private:
 135     DECLARE_EVENT_TABLE()
 136     DECLARE_WIDGETS_PAGE(ButtonWidgetsPage)
 137 };
 138
 139 // ----------------------------------------------------------------------------
 140 // event tables
 141 // ----------------------------------------------------------------------------
 142
 143 BEGIN_EVENT_TABLE(ButtonWidgetsPage, WidgetsPage)
 144     EVT_BUTTON(ButtonPage_Button, ButtonWidgetsPage::OnButton)
 145
 146     EVT_BUTTON(ButtonPage_Reset, ButtonWidgetsPage::OnButtonReset)
 147     EVT_BUTTON(ButtonPage_ChangeLabel, ButtonWidgetsPage::OnButtonChangeLabel)
 148
 149     EVT_CHECKBOX(wxID_ANY, ButtonWidgetsPage::OnCheckOrRadioBox)
 150     EVT_RADIOBOX(wxID_ANY, ButtonWidgetsPage::OnCheckOrRadioBox)
 151 END_EVENT_TABLE()
 152
 153 // ============================================================================
 154 // implementation
 155 // ============================================================================
 156
 157 IMPLEMENT_WIDGETS_PAGE(ButtonWidgetsPage, _T("Button"));
 158
 159 ButtonWidgetsPage::ButtonWidgetsPage(wxBookCtrlBase *book,
 160                                      wxImageList *imaglist)
 161                   : WidgetsPage(book)
 162 {
 163     imaglist->Add(wxBitmap(button_xpm));
 164
 165     // init everything
 166     m_chkBitmap =
 167     m_chkImage =
 168     m_chkFit =
 169     m_chkDefault =
 170     m_chkUseSelected =
 171     m_chkUseFocused =
 172     m_chkUseHover =
 173     m_chkUseDisabled = (wxCheckBox *)NULL;
 174
 175     m_radioHAlign =
 176     m_radioVAlign = (wxRadioBox *)NULL;
 177
 178     m_textLabel = (wxTextCtrl *)NULL;
 179
 180     m_button = (wxButton *)NULL;
 181     m_sizerButton = (wxSizer *)NULL;
 182
 183     wxSizer *sizerTop = new wxBoxSizer(wxHORIZONTAL);
 184
 185     // left pane
 186     wxStaticBox *box = new wxStaticBox(this, wxID_ANY, _T("&Set style"));
 187
 188     wxSizer *sizerLeft = new wxStaticBoxSizer(box, wxVERTICAL);
 189
 190     m_chkBitmap = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Bitmap button"));
 191     m_chkImage = CreateCheckBoxAndAddToSizer(sizerLeft, _T("With &image"));
 192     m_chkFit = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Fit exactly"));
 193     m_chkDefault = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Default"));
 194
 195 #ifndef __WXUNIVERSAL__
 196     // only wxUniv currently supports buttons with images
 197     m_chkImage->Disable();
 198 #endif // !wxUniv
 199
 200     sizerLeft->AddSpacer(5);
 201
 202     wxSizer *sizerUseLabels =
 203         new wxStaticBoxSizer(wxVERTICAL, this, _T("&Use the following labels?"));
 204     m_chkUseSelected = CreateCheckBoxAndAddToSizer(sizerUseLabels, _T("&Pushed"));
 205     m_chkUseFocused = CreateCheckBoxAndAddToSizer(sizerUseLabels, _T("&Focused"));
 206     m_chkUseHover = CreateCheckBoxAndAddToSizer(sizerUseLabels, _T("&Hover"));
 207     m_chkUseDisabled = CreateCheckBoxAndAddToSizer(sizerUseLabels, _T("&Disabled"));
 208     sizerLeft->Add(sizerUseLabels, wxSizerFlags().Expand().Border());
 209
 210     sizerLeft->AddSpacer(15);
 211
 212     // should be in sync with enums Button[HV]Align!
 213     static const wxString halign[] =
 214     {
 215         _T("left"),
 216         _T("centre"),
 217         _T("right"),
 218     };
 219
 220     static const wxString valign[] =
 221     {
 222         _T("top"),
 223         _T("centre"),
 224         _T("bottom"),
 225     };
 226
 227     m_radioHAlign = new wxRadioBox(this, wxID_ANY, _T("&Horz alignment"),
 228                                    wxDefaultPosition, wxDefaultSize,
 229                                    WXSIZEOF(halign), halign);
 230     m_radioVAlign = new wxRadioBox(this, wxID_ANY, _T("&Vert alignment"),
 231                                    wxDefaultPosition, wxDefaultSize,
 232                                    WXSIZEOF(valign), valign);
 233
 234     sizerLeft->Add(m_radioHAlign, 0, wxGROW | wxALL, 5);
 235     sizerLeft->Add(m_radioVAlign, 0, wxGROW | wxALL, 5);
 236
 237     sizerLeft->Add(5, 5, 0, wxGROW | wxALL, 5); // spacer
 238
 239     wxButton *btn = new wxButton(this, ButtonPage_Reset, _T("&Reset"));
 240     sizerLeft->Add(btn, 0, wxALIGN_CENTRE_HORIZONTAL | wxALL, 15);
 241
 242     // middle pane
 243     wxStaticBox *box2 = new wxStaticBox(this, wxID_ANY, _T("&Operations"));
 244     wxSizer *sizerMiddle = new wxStaticBoxSizer(box2, wxVERTICAL);
 245
 246     wxSizer *sizerRow = CreateSizerWithTextAndButton(ButtonPage_ChangeLabel,
 247                                                      _T("Change label"),
 248                                                      wxID_ANY,
 249                                                      &m_textLabel);
 250     m_textLabel->SetValue(_T("&Press me!"));
 251
 252     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 253
 254     // right pane
 255     m_sizerButton = new wxBoxSizer(wxHORIZONTAL);
 256     m_sizerButton->SetMinSize(150, 0);
 257
 258     // the 3 panes panes compose the window
 259     sizerTop->Add(sizerLeft, 0, wxGROW | (wxALL & ~wxLEFT), 10);
 260     sizerTop->Add(sizerMiddle, 1, wxGROW | wxALL, 10);
 261     sizerTop->Add(m_sizerButton, 1, wxGROW | (wxALL & ~wxRIGHT), 10);
 262
 263     // do create the main control
 264     Reset();
 265     CreateButton();
 266
 267     SetSizer(sizerTop);
 268
 269     sizerTop->Fit(this);
 270 }
 271
 272 // ----------------------------------------------------------------------------
 273 // operations
 274 // ----------------------------------------------------------------------------
 275
 276 void ButtonWidgetsPage::Reset()
 277 {
 278     m_chkBitmap->SetValue(false);
 279     m_chkFit->SetValue(true);
 280     m_chkImage->SetValue(false);
 281     m_chkDefault->SetValue(false);
 282
 283     m_chkUseSelected->SetValue(true);
 284     m_chkUseFocused->SetValue(true);
 285     m_chkUseHover->SetValue(true);
 286     m_chkUseDisabled->SetValue(true);
 287
 288     m_radioHAlign->SetSelection(ButtonHAlign_Centre);
 289     m_radioVAlign->SetSelection(ButtonVAlign_Centre);
 290 }
 291
 292 void ButtonWidgetsPage::CreateButton()
 293 {
 294     wxString label;
 295     if ( m_button )
 296     {
 297         label = m_button->GetLabel();
 298
 299         size_t count = m_sizerButton->GetChildren().GetCount();
 300         for ( size_t n = 0; n < count; n++ )
 301         {
 302             m_sizerButton->Remove( 0 );
 303         }
 304
 305         delete m_button;
 306     }
 307
 308     if ( label.empty() )
 309     {
 310         // creating for the first time or recreating a button after bitmap
 311         // button
 312         label = m_textLabel->GetValue();
 313     }
 314
 315     int flags = ms_defaultFlags;
 316     switch ( m_radioHAlign->GetSelection() )
 317     {
 318         case ButtonHAlign_Left:
 319             flags |= wxBU_LEFT;
 320             break;
 321
 322         default:
 323             wxFAIL_MSG(_T("unexpected radiobox selection"));
 324             // fall through
 325
 326         case ButtonHAlign_Centre:
 327             break;
 328
 329         case ButtonHAlign_Right:
 330             flags |= wxBU_RIGHT;
 331             break;
 332     }
 333
 334     switch ( m_radioVAlign->GetSelection() )
 335     {
 336         case ButtonVAlign_Top:
 337             flags |= wxBU_TOP;
 338             break;
 339
 340         default:
 341             wxFAIL_MSG(_T("unexpected radiobox selection"));
 342             // fall through
 343
 344         case ButtonVAlign_Centre:
 345             // centre vertical alignment is the default (no style)
 346             break;
 347
 348         case ButtonVAlign_Bottom:
 349             flags |= wxBU_BOTTOM;
 350             break;
 351     }
 352
 353     const bool isBitmapButton = m_chkBitmap->GetValue();
 354     if ( isBitmapButton )
 355     {
 356         wxBitmapButton *bbtn = new wxBitmapButton(this, ButtonPage_Button,
 357                                                   CreateBitmap(_T("normal")));
 358         if ( m_chkUseSelected->GetValue() )
 359             bbtn->SetBitmapSelected(CreateBitmap(_T("pushed")));
 360         if ( m_chkUseFocused->GetValue() )
 361             bbtn->SetBitmapFocus(CreateBitmap(_T("focused")));
 362         if ( m_chkUseHover->GetValue() )
 363             bbtn->SetBitmapHover(CreateBitmap(_T("hover")));
 364         if ( m_chkUseDisabled->GetValue() )
 365             bbtn->SetBitmapDisabled(CreateBitmap(_T("disabled")));
 366         m_button = bbtn;
 367     }
 368     else // normal button
 369     {
 370         m_button = new wxButton(this, ButtonPage_Button, label,
 371                                 wxDefaultPosition, wxDefaultSize,
 372                                 flags);
 373     }
 374
 375     m_chkUseSelected->Enable(isBitmapButton);
 376     m_chkUseFocused->Enable(isBitmapButton);
 377     m_chkUseHover->Enable(isBitmapButton);
 378     m_chkUseDisabled->Enable(isBitmapButton);
 379
 380 #ifdef __WXUNIVERSAL__
 381     if ( m_chkImage->GetValue() )
 382     {
 383         m_button->SetImageLabel(wxArtProvider::GetIcon(wxART_INFORMATION));
 384     }
 385 #endif // wxUniv
 386
 387     if ( m_chkDefault->GetValue() )
 388     {
 389         m_button->SetDefault();
 390     }
 391
 392     AddButtonToSizer();
 393
 394     m_sizerButton->Layout();
 395 }
 396
 397 void ButtonWidgetsPage::AddButtonToSizer()
 398 {
 399     if ( m_chkFit->GetValue() )
 400     {
 401         m_sizerButton->AddStretchSpacer(1);
 402         m_sizerButton->Add(m_button, wxSizerFlags(0).Centre().Border());
 403         m_sizerButton->AddStretchSpacer(1);
 404     }
 405     else // take up the entire space
 406     {
 407         m_sizerButton->Add(m_button, wxSizerFlags(1).Expand().Border());
 408     }
 409 }
 410
 411 // ----------------------------------------------------------------------------
 412 // event handlers
 413 // ----------------------------------------------------------------------------
 414
 415 void ButtonWidgetsPage::OnButtonReset(wxCommandEvent& WXUNUSED(event))
 416 {
 417     Reset();
 418
 419     CreateButton();
 420 }
 421
 422 void ButtonWidgetsPage::OnCheckOrRadioBox(wxCommandEvent& WXUNUSED(event))
 423 {
 424     CreateButton();
 425 }
 426
 427 void ButtonWidgetsPage::OnButtonChangeLabel(wxCommandEvent& WXUNUSED(event))
 428 {
 429     m_button->SetLabel(m_textLabel->GetValue());
 430 }
 431
 432 void ButtonWidgetsPage::OnButton(wxCommandEvent& WXUNUSED(event))
 433 {
 434     wxLogMessage(_T("Test button clicked."));
 435 }
 436
 437 // ----------------------------------------------------------------------------
 438 // bitmap button stuff
 439 // ----------------------------------------------------------------------------
 440
 441 wxBitmap ButtonWidgetsPage::CreateBitmap(const wxString& label)
 442 {
 443     wxBitmap bmp(180, 70); // shouldn't hardcode but it's simpler like this
 444     wxMemoryDC dc;
 445     dc.SelectObject(bmp);
 446     dc.SetBackground(wxBrush(*wxWHITE));
 447     dc.Clear();
 448     dc.SetTextForeground(*wxBLUE);
 449     dc.DrawLabel(wxStripMenuCodes(m_textLabel->GetValue()) + _T("\n")
 450                     _T("(") + label + _T(" state)"),
 451                  wxArtProvider::GetBitmap(wxART_INFORMATION),
 452                  wxRect(10, 10, bmp.GetWidth() - 20, bmp.GetHeight() - 20),
 453                  wxALIGN_CENTRE);
 454
 455     return bmp;
 456 }
 457