src/gtk/checkbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        checkbox.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  12 #pragma implementation "checkbox.h"
  13 #endif
  14
  15 // For compilers that support precompilation, includes "wx.h".
  16 #include "wx/wxprec.h"
  17
  18 #include "wx/defs.h"
  19
  20 #if wxUSE_CHECKBOX
  21
  22 #include "wx/checkbox.h"
  23
  24 #include "wx/gtk/private.h"
  25
  26 //-----------------------------------------------------------------------------
  27 // idle system
  28 //-----------------------------------------------------------------------------
  29
  30 extern void wxapp_install_idle_handler();
  31 extern bool g_isIdle;
  32
  33 //-----------------------------------------------------------------------------
  34 // data
  35 //-----------------------------------------------------------------------------
  36
  37 extern bool           g_blockEventsOnDrag;
  38 extern wxCursor       g_globalCursor;
  39 extern wxWindowGTK   *g_delayedFocus;
  40
  41 //-----------------------------------------------------------------------------
  42 // "clicked"
  43 //-----------------------------------------------------------------------------
  44
  45 extern "C" {
  46 static void gtk_checkbox_toggled_callback(GtkWidget *widget, wxCheckBox *cb)
  47 {
  48     if (g_isIdle) wxapp_install_idle_handler();
  49
  50     if (!cb->m_hasVMT) return;
  51
  52     if (g_blockEventsOnDrag) return;
  53
  54     if (cb->m_blockEvent) return;
  55
  56 #ifdef __WXGTK20__
  57     // Transitions for 3state checkbox must be done manually, GTK's checkbox
  58     // is 2state with additional "undetermined state" flag which isn't
  59     // changed automatically:
  60     if (cb->Is3State())
  61     {
  62         GtkToggleButton *toggle = GTK_TOGGLE_BUTTON(widget);
  63
  64         if (cb->Is3rdStateAllowedForUser())
  65         {
  66             // The 3 states cycle like this when clicked:
  67             // checked -> undetermined -> unchecked -> checked -> ...
  68             bool active = gtk_toggle_button_get_active(toggle);
  69             bool inconsistent = gtk_toggle_button_get_inconsistent(toggle);
  70
  71             cb->m_blockEvent = true;
  72
  73             if (!active && !inconsistent)
  74             {
  75                 // checked -> undetermined
  76                 gtk_toggle_button_set_active(toggle, true);
  77                 gtk_toggle_button_set_inconsistent(toggle, true);
  78             }
  79             else if (!active && inconsistent)
  80             {
  81                 // undetermined -> unchecked
  82                 gtk_toggle_button_set_inconsistent(toggle, false);
  83             }
  84             else if (active && !inconsistent)
  85             {
  86                 // unchecked -> checked
  87                 // nothing to do
  88             }
  89             else
  90             {
  91                 wxFAIL_MSG(_T("3state wxCheckBox in unexpected state!"));
  92             }
  93
  94             cb->m_blockEvent = false;
  95         }
  96         else
  97         {
  98             // user's action unsets undetermined state:
  99             gtk_toggle_button_set_inconsistent(toggle, false);
 100         }
 101     }
 102 #endif
 103
 104     wxCommandEvent event(wxEVT_COMMAND_CHECKBOX_CLICKED, cb->GetId());
 105 #ifdef __WXGTK20__
 106     event.SetInt(cb->Get3StateValue());
 107 #else
 108     event.SetInt(cb->GetValue());
 109 #endif
 110     event.SetEventObject(cb);
 111     cb->GetEventHandler()->ProcessEvent(event);
 112 }
 113 }
 114
 115 //-----------------------------------------------------------------------------
 116 // wxCheckBox
 117 //-----------------------------------------------------------------------------
 118
 119 IMPLEMENT_DYNAMIC_CLASS(wxCheckBox,wxControl)
 120
 121 wxCheckBox::wxCheckBox()
 122 {
 123 }
 124
 125 bool wxCheckBox::Create(wxWindow *parent,
 126                         wxWindowID id,
 127                         const wxString &label,
 128                         const wxPoint &pos,
 129                         const wxSize &size,
 130                         long style,
 131                         const wxValidator& validator,
 132                         const wxString &name )
 133 {
 134     m_needParent = TRUE;
 135     m_acceptsFocus = TRUE;
 136     m_blockEvent = FALSE;
 137
 138     if (!PreCreation( parent, pos, size ) ||
 139         !CreateBase( parent, id, pos, size, style, validator, name ))
 140     {
 141         wxFAIL_MSG( wxT("wxCheckBox creation failed") );
 142         return FALSE;
 143     }
 144
 145     wxASSERT_MSG( (style & wxCHK_ALLOW_3RD_STATE_FOR_USER) == 0 ||
 146                   (style & wxCHK_3STATE) != 0,
 147                   wxT("Using wxCHK_ALLOW_3RD_STATE_FOR_USER")
 148                   wxT(" style flag for a 2-state checkbox is useless") );
 149
 150     if ( style & wxALIGN_RIGHT )
 151     {
 152         // VZ: as I don't know a way to create a right aligned checkbox with
 153         //     GTK we will create a checkbox without label and a label at the
 154         //     left of it
 155         m_widgetCheckbox = gtk_check_button_new();
 156
 157         m_widgetLabel = gtk_label_new("");
 158         gtk_misc_set_alignment(GTK_MISC(m_widgetLabel), 0.0, 0.5);
 159
 160         m_widget = gtk_hbox_new(FALSE, 0);
 161         gtk_box_pack_start(GTK_BOX(m_widget), m_widgetLabel, FALSE, FALSE, 3);
 162         gtk_box_pack_start(GTK_BOX(m_widget), m_widgetCheckbox, FALSE, FALSE, 3);
 163
 164         gtk_widget_show( m_widgetLabel );
 165         gtk_widget_show( m_widgetCheckbox );
 166     }
 167     else
 168     {
 169         m_widgetCheckbox = gtk_check_button_new_with_label("");
 170         m_widgetLabel = BUTTON_CHILD( m_widgetCheckbox );
 171         m_widget = m_widgetCheckbox;
 172     }
 173     SetLabel( label );
 174
 175     gtk_signal_connect( GTK_OBJECT(m_widgetCheckbox),
 176                         "toggled",
 177                         GTK_SIGNAL_FUNC(gtk_checkbox_toggled_callback),
 178                         (gpointer *)this );
 179
 180     m_parent->DoAddChild( this );
 181
 182     PostCreation(size);
 183
 184     return TRUE;
 185 }
 186
 187 void wxCheckBox::SetValue( bool state )
 188 {
 189     wxCHECK_RET( m_widgetCheckbox != NULL, wxT("invalid checkbox") );
 190
 191     if (state == GetValue())
 192         return;
 193
 194     m_blockEvent = TRUE;
 195
 196     gtk_toggle_button_set_state( GTK_TOGGLE_BUTTON(m_widgetCheckbox), state );
 197
 198     m_blockEvent = FALSE;
 199 }
 200
 201 bool wxCheckBox::GetValue() const
 202 {
 203     wxCHECK_MSG( m_widgetCheckbox != NULL, FALSE, wxT("invalid checkbox") );
 204
 205 #ifdef __WXGTK20__
 206     return gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(m_widgetCheckbox));
 207 #else
 208     return GTK_TOGGLE_BUTTON(m_widgetCheckbox)->active;
 209 #endif
 210 }
 211
 212 #ifdef __WXGTK20__
 213 void wxCheckBox::DoSet3StateValue(wxCheckBoxState state)
 214 {
 215     SetValue(state != wxCHK_UNCHECKED);
 216     gtk_toggle_button_set_inconsistent(GTK_TOGGLE_BUTTON(m_widgetCheckbox),
 217                                        state == wxCHK_UNDETERMINED);
 218 }
 219
 220 wxCheckBoxState wxCheckBox::DoGet3StateValue() const
 221 {
 222     if (gtk_toggle_button_get_inconsistent(GTK_TOGGLE_BUTTON(m_widgetCheckbox)))
 223     {
 224         return wxCHK_UNDETERMINED;
 225     }
 226     else
 227     {
 228         return GetValue() ? wxCHK_CHECKED : wxCHK_UNCHECKED;
 229     }
 230 }
 231 #endif
 232
 233 void wxCheckBox::SetLabel( const wxString& label )
 234 {
 235     wxCHECK_RET( m_widgetLabel != NULL, wxT("invalid checkbox") );
 236
 237     wxControl::SetLabel( label );
 238
 239 #ifdef __WXGTK20__
 240     wxString label2 = PrepareLabelMnemonics( label );
 241     gtk_label_set_text_with_mnemonic( GTK_LABEL(m_widgetLabel), wxGTK_CONV( label2 ) );
 242 #else
 243     gtk_label_set( GTK_LABEL(m_widgetLabel), wxGTK_CONV( GetLabel() ) );
 244 #endif
 245 }
 246
 247 bool wxCheckBox::Enable( bool enable )
 248 {
 249     if ( !wxControl::Enable( enable ) )
 250         return FALSE;
 251
 252     gtk_widget_set_sensitive( m_widgetLabel, enable );
 253
 254     return TRUE;
 255 }
 256
 257 void wxCheckBox::DoApplyWidgetStyle(GtkRcStyle *style)
 258 {
 259     gtk_widget_modify_style(m_widgetCheckbox, style);
 260     gtk_widget_modify_style(m_widgetLabel, style);
 261 }
 262
 263 bool wxCheckBox::IsOwnGtkWindow( GdkWindow *window )
 264 {
 265     return window == TOGGLE_BUTTON_EVENT_WIN(m_widget);
 266 }
 267
 268 void wxCheckBox::OnInternalIdle()
 269 {
 270     wxCursor cursor = m_cursor;
 271     if (g_globalCursor.Ok()) cursor = g_globalCursor;
 272
 273     GdkWindow *event_window = TOGGLE_BUTTON_EVENT_WIN(m_widgetCheckbox);
 274     if ( event_window && cursor.Ok() )
 275     {
 276         /* I now set the cursor the anew in every OnInternalIdle call
 277            as setting the cursor in a parent window also effects the
 278            windows above so that checking for the current cursor is
 279            not possible. */
 280
 281        gdk_window_set_cursor( event_window, cursor.GetCursor() );
 282     }
 283
 284     if (g_delayedFocus == this)
 285     {
 286         if (GTK_WIDGET_REALIZED(m_widget))
 287         {
 288             gtk_widget_grab_focus( m_widget );
 289             g_delayedFocus = NULL;
 290         }
 291     }
 292
 293     if (wxUpdateUIEvent::CanUpdate(this))
 294         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
 295 }
 296
 297 wxSize wxCheckBox::DoGetBestSize() const
 298 {
 299     return wxControl::DoGetBestSize();
 300 }
 301
 302 // static
 303 wxVisualAttributes
 304 wxCheckBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 305 {
 306     return GetDefaultAttributesFromGTKWidget(gtk_check_button_new);
 307 }
 308
 309 #endif