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