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