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(WidgetsBookCtrl *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                        (int)wxPlatform(GENERIC_CTRLS).If(wxMSW,NATIVE_CTRLS)
 159                        );
 160
 161 ButtonWidgetsPage::ButtonWidgetsPage(WidgetsBookCtrl *book,
 162                                      wxImageList *imaglist)
 163                   : WidgetsPage(book)
 164 {
 165     imaglist->Add(wxBitmap(button_xpm));
 166
 167     // init everything
 168     m_chkBitmap =
 169     m_chkImage =
 170     m_chkFit =
 171     m_chkDefault =
 172     m_chkUseSelected =
 173     m_chkUseFocused =
 174     m_chkUseHover =
 175     m_chkUseDisabled = (wxCheckBox *)NULL;
 176
 177     m_radioHAlign =
 178     m_radioVAlign = (wxRadioBox *)NULL;
 179
 180     m_textLabel = (wxTextCtrl *)NULL;
 181
 182     m_button = (wxButton *)NULL;
 183     m_sizerButton = (wxSizer *)NULL;
 184
 185     wxSizer *sizerTop = new wxBoxSizer(wxHORIZONTAL);
 186
 187     // left pane
 188     wxStaticBox *box = new wxStaticBox(this, wxID_ANY, _T("&Set style"));
 189
 190     wxSizer *sizerLeft = new wxStaticBoxSizer(box, wxVERTICAL);
 191
 192     m_chkBitmap = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Bitmap button"));
 193     m_chkImage = CreateCheckBoxAndAddToSizer(sizerLeft, _T("With &image"));
 194     m_chkFit = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Fit exactly"));
 195     m_chkDefault = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Default"));
 196
 197 #ifndef __WXUNIVERSAL__
 198     // only wxUniv currently supports buttons with images
 199     m_chkImage->Disable();
 200 #endif // !wxUniv
 201
 202     sizerLeft->AddSpacer(5);
 203
 204     wxSizer *sizerUseLabels =
 205         new wxStaticBoxSizer(wxVERTICAL, this, _T("&Use the following labels?"));
 206     m_chkUseSelected = CreateCheckBoxAndAddToSizer(sizerUseLabels, _T("&Pushed"));
 207     m_chkUseFocused = CreateCheckBoxAndAddToSizer(sizerUseLabels, _T("&Focused"));
 208     m_chkUseHover = CreateCheckBoxAndAddToSizer(sizerUseLabels, _T("&Hover"));
 209     m_chkUseDisabled = CreateCheckBoxAndAddToSizer(sizerUseLabels, _T("&Disabled"));
 210     sizerLeft->Add(sizerUseLabels, wxSizerFlags().Expand().Border());
 211
 212     sizerLeft->AddSpacer(15);
 213
 214     // should be in sync with enums Button[HV]Align!
 215     static const wxString halign[] =
 216     {
 217         _T("left"),
 218         _T("centre"),
 219         _T("right"),
 220     };
 221
 222     static const wxString valign[] =
 223     {
 224         _T("top"),
 225         _T("centre"),
 226         _T("bottom"),
 227     };
 228
 229     m_radioHAlign = new wxRadioBox(this, wxID_ANY, _T("&Horz alignment"),
 230                                    wxDefaultPosition, wxDefaultSize,
 231                                    WXSIZEOF(halign), halign);
 232     m_radioVAlign = new wxRadioBox(this, wxID_ANY, _T("&Vert alignment"),
 233                                    wxDefaultPosition, wxDefaultSize,
 234                                    WXSIZEOF(valign), valign);
 235
 236     sizerLeft->Add(m_radioHAlign, 0, wxGROW | wxALL, 5);
 237     sizerLeft->Add(m_radioVAlign, 0, wxGROW | wxALL, 5);
 238
 239     sizerLeft->Add(5, 5, 0, wxGROW | wxALL, 5); // spacer
 240
 241     wxButton *btn = new wxButton(this, ButtonPage_Reset, _T("&Reset"));
 242     sizerLeft->Add(btn, 0, wxALIGN_CENTRE_HORIZONTAL | wxALL, 15);
 243
 244     // middle pane
 245     wxStaticBox *box2 = new wxStaticBox(this, wxID_ANY, _T("&Operations"));
 246     wxSizer *sizerMiddle = new wxStaticBoxSizer(box2, wxVERTICAL);
 247
 248     wxSizer *sizerRow = CreateSizerWithTextAndButton(ButtonPage_ChangeLabel,
 249                                                      _T("Change label"),
 250                                                      wxID_ANY,
 251                                                      &m_textLabel);
 252     m_textLabel->SetValue(_T("&Press me!"));
 253
 254     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 255
 256     // right pane
 257     m_sizerButton = new wxBoxSizer(wxHORIZONTAL);
 258     m_sizerButton->SetMinSize(150, 0);
 259
 260     // the 3 panes panes compose the window
 261     sizerTop->Add(sizerLeft, 0, wxGROW | (wxALL & ~wxLEFT), 10);
 262     sizerTop->Add(sizerMiddle, 1, wxGROW | wxALL, 10);
 263     sizerTop->Add(m_sizerButton, 1, wxGROW | (wxALL & ~wxRIGHT), 10);
 264
 265     // do create the main control
 266     Reset();
 267     CreateButton();
 268
 269     SetSizer(sizerTop);
 270
 271     sizerTop->Fit(this);
 272 }
 273
 274 // ----------------------------------------------------------------------------
 275 // operations
 276 // ----------------------------------------------------------------------------
 277
 278 void ButtonWidgetsPage::Reset()
 279 {
 280     m_chkBitmap->SetValue(false);
 281     m_chkFit->SetValue(true);
 282     m_chkImage->SetValue(false);
 283     m_chkDefault->SetValue(false);
 284
 285     m_chkUseSelected->SetValue(true);
 286     m_chkUseFocused->SetValue(true);
 287     m_chkUseHover->SetValue(true);
 288     m_chkUseDisabled->SetValue(true);
 289
 290     m_radioHAlign->SetSelection(ButtonHAlign_Centre);
 291     m_radioVAlign->SetSelection(ButtonVAlign_Centre);
 292 }
 293
 294 void ButtonWidgetsPage::CreateButton()
 295 {
 296     wxString label;
 297     if ( m_button )
 298     {
 299         label = m_button->GetLabel();
 300
 301         size_t count = m_sizerButton->GetChildren().GetCount();
 302         for ( size_t n = 0; n < count; n++ )
 303         {
 304             m_sizerButton->Remove( 0 );
 305         }
 306
 307         delete m_button;
 308     }
 309
 310     if ( label.empty() )
 311     {
 312         // creating for the first time or recreating a button after bitmap
 313         // button
 314         label = m_textLabel->GetValue();
 315     }
 316
 317     int flags = ms_defaultFlags;
 318     switch ( m_radioHAlign->GetSelection() )
 319     {
 320         case ButtonHAlign_Left:
 321             flags |= wxBU_LEFT;
 322             break;
 323
 324         default:
 325             wxFAIL_MSG(_T("unexpected radiobox selection"));
 326             // fall through
 327
 328         case ButtonHAlign_Centre:
 329             break;
 330
 331         case ButtonHAlign_Right:
 332             flags |= wxBU_RIGHT;
 333             break;
 334     }
 335
 336     switch ( m_radioVAlign->GetSelection() )
 337     {
 338         case ButtonVAlign_Top:
 339             flags |= wxBU_TOP;
 340             break;
 341
 342         default:
 343             wxFAIL_MSG(_T("unexpected radiobox selection"));
 344             // fall through
 345
 346         case ButtonVAlign_Centre:
 347             // centre vertical alignment is the default (no style)
 348             break;
 349
 350         case ButtonVAlign_Bottom:
 351             flags |= wxBU_BOTTOM;
 352             break;
 353     }
 354
 355     const bool isBitmapButton = m_chkBitmap->GetValue();
 356     if ( isBitmapButton )
 357     {
 358         wxBitmapButton *bbtn = new wxBitmapButton(this, ButtonPage_Button,
 359                                                   CreateBitmap(_T("normal")));
 360         if ( m_chkUseSelected->GetValue() )
 361             bbtn->SetBitmapSelected(CreateBitmap(_T("pushed")));
 362         if ( m_chkUseFocused->GetValue() )
 363             bbtn->SetBitmapFocus(CreateBitmap(_T("focused")));
 364         if ( m_chkUseHover->GetValue() )
 365             bbtn->SetBitmapHover(CreateBitmap(_T("hover")));
 366         if ( m_chkUseDisabled->GetValue() )
 367             bbtn->SetBitmapDisabled(CreateBitmap(_T("disabled")));
 368         m_button = bbtn;
 369     }
 370     else // normal button
 371     {
 372         m_button = new wxButton(this, ButtonPage_Button, label,
 373                                 wxDefaultPosition, wxDefaultSize,
 374                                 flags);
 375     }
 376
 377     m_chkUseSelected->Enable(isBitmapButton);
 378     m_chkUseFocused->Enable(isBitmapButton);
 379     m_chkUseHover->Enable(isBitmapButton);
 380     m_chkUseDisabled->Enable(isBitmapButton);
 381
 382 #ifdef __WXUNIVERSAL__
 383     if ( m_chkImage->GetValue() )
 384     {
 385         m_button->SetImageLabel(wxArtProvider::GetIcon(wxART_INFORMATION));
 386     }
 387 #endif // wxUniv
 388
 389     if ( m_chkDefault->GetValue() )
 390     {
 391         m_button->SetDefault();
 392     }
 393
 394     AddButtonToSizer();
 395
 396     m_sizerButton->Layout();
 397 }
 398
 399 void ButtonWidgetsPage::AddButtonToSizer()
 400 {
 401     if ( m_chkFit->GetValue() )
 402     {
 403         m_sizerButton->AddStretchSpacer(1);
 404         m_sizerButton->Add(m_button, wxSizerFlags(0).Centre().Border());
 405         m_sizerButton->AddStretchSpacer(1);
 406     }
 407     else // take up the entire space
 408     {
 409         m_sizerButton->Add(m_button, wxSizerFlags(1).Expand().Border());
 410     }
 411 }
 412
 413 // ----------------------------------------------------------------------------
 414 // event handlers
 415 // ----------------------------------------------------------------------------
 416
 417 void ButtonWidgetsPage::OnButtonReset(wxCommandEvent& WXUNUSED(event))
 418 {
 419     Reset();
 420
 421     CreateButton();
 422 }
 423
 424 void ButtonWidgetsPage::OnCheckOrRadioBox(wxCommandEvent& WXUNUSED(event))
 425 {
 426     CreateButton();
 427 }
 428
 429 void ButtonWidgetsPage::OnButtonChangeLabel(wxCommandEvent& WXUNUSED(event))
 430 {
 431     m_button->SetLabel(m_textLabel->GetValue());
 432 }
 433
 434 void ButtonWidgetsPage::OnButton(wxCommandEvent& WXUNUSED(event))
 435 {
 436     wxLogMessage(_T("Test button clicked."));
 437 }
 438
 439 // ----------------------------------------------------------------------------
 440 // bitmap button stuff
 441 // ----------------------------------------------------------------------------
 442
 443 wxBitmap ButtonWidgetsPage::CreateBitmap(const wxString& label)
 444 {
 445     wxBitmap bmp(180, 70); // shouldn't hardcode but it's simpler like this
 446     wxMemoryDC dc;
 447     dc.SelectObject(bmp);
 448     dc.SetBackground(wxBrush(*wxWHITE));
 449     dc.Clear();
 450     dc.SetTextForeground(*wxBLUE);
 451     dc.DrawLabel(wxStripMenuCodes(m_textLabel->GetValue()) + _T("\n")
 452                     _T("(") + label + _T(" state)"),
 453                  wxArtProvider::GetBitmap(wxART_INFORMATION),
 454                  wxRect(10, 10, bmp.GetWidth() - 20, bmp.GetHeight() - 20),
 455                  wxALIGN_CENTRE);
 456
 457     return bmp;
 458 }
 459