src/gtk/checkbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/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 #if wxUSE_CHECKBOX
  14
  15 #include "wx/checkbox.h"
  16
  17 #include <gtk/gtk.h>
  18
  19 //-----------------------------------------------------------------------------
  20 // data
  21 //-----------------------------------------------------------------------------
  22
  23 extern bool           g_blockEventsOnDrag;
  24
  25 //-----------------------------------------------------------------------------
  26 // "clicked"
  27 //-----------------------------------------------------------------------------
  28
  29 extern "C" {
  30 static void gtk_checkbox_toggled_callback(GtkWidget *widget, wxCheckBox *cb)
  31 {
  32     if (!cb->m_hasVMT) return;
  33
  34     if (g_blockEventsOnDrag) return;
  35
  36     // Transitions for 3state checkbox must be done manually, GTK's checkbox
  37     // is 2state with additional "undetermined state" flag which isn't
  38     // changed automatically:
  39     if (cb->Is3State())
  40     {
  41         GtkToggleButton *toggle = GTK_TOGGLE_BUTTON(widget);
  42
  43         if (cb->Is3rdStateAllowedForUser())
  44         {
  45             // The 3 states cycle like this when clicked:
  46             // checked -> undetermined -> unchecked -> checked -> ...
  47             bool active = gtk_toggle_button_get_active(toggle);
  48             bool inconsistent = gtk_toggle_button_get_inconsistent(toggle);
  49
  50             cb->GTKDisableEvents();
  51
  52             if (!active && !inconsistent)
  53             {
  54                 // checked -> undetermined
  55                 gtk_toggle_button_set_active(toggle, true);
  56                 gtk_toggle_button_set_inconsistent(toggle, true);
  57             }
  58             else if (!active && inconsistent)
  59             {
  60                 // undetermined -> unchecked
  61                 gtk_toggle_button_set_inconsistent(toggle, false);
  62             }
  63             else if (active && !inconsistent)
  64             {
  65                 // unchecked -> checked
  66                 // nothing to do
  67             }
  68             else
  69             {
  70                 wxFAIL_MSG(wxT("3state wxCheckBox in unexpected state!"));
  71             }
  72
  73             cb->GTKEnableEvents();
  74         }
  75         else
  76         {
  77             // user's action unsets undetermined state:
  78             gtk_toggle_button_set_inconsistent(toggle, false);
  79         }
  80     }
  81
  82     wxCommandEvent event(wxEVT_COMMAND_CHECKBOX_CLICKED, cb->GetId());
  83     event.SetInt(cb->Get3StateValue());
  84     event.SetEventObject(cb);
  85     cb->HandleWindowEvent(event);
  86 }
  87 }
  88
  89 //-----------------------------------------------------------------------------
  90 // wxCheckBox
  91 //-----------------------------------------------------------------------------
  92
  93 wxCheckBox::wxCheckBox()
  94 {
  95 }
  96
  97 bool wxCheckBox::Create(wxWindow *parent,
  98                         wxWindowID id,
  99                         const wxString &label,
 100                         const wxPoint &pos,
 101                         const wxSize &size,
 102                         long style,
 103                         const wxValidator& validator,
 104                         const wxString &name )
 105 {
 106     WXValidateStyle( &style );
 107     if (!PreCreation( parent, pos, size ) ||
 108         !CreateBase( parent, id, pos, size, style, validator, name ))
 109     {
 110         wxFAIL_MSG( wxT("wxCheckBox creation failed") );
 111         return false;
 112     }
 113
 114     if ( style & wxALIGN_RIGHT )
 115     {
 116         // VZ: as I don't know a way to create a right aligned checkbox with
 117         //     GTK we will create a checkbox without label and a label at the
 118         //     left of it
 119         m_widgetCheckbox = gtk_check_button_new();
 120
 121         m_widgetLabel = gtk_label_new("");
 122         gtk_misc_set_alignment(GTK_MISC(m_widgetLabel), 0.0, 0.5);
 123
 124         m_widget = gtk_hbox_new(FALSE, 0);
 125         gtk_box_pack_start(GTK_BOX(m_widget), m_widgetLabel, FALSE, FALSE, 3);
 126         gtk_box_pack_start(GTK_BOX(m_widget), m_widgetCheckbox, FALSE, FALSE, 3);
 127
 128         gtk_widget_show( m_widgetLabel );
 129         gtk_widget_show( m_widgetCheckbox );
 130     }
 131     else
 132     {
 133         m_widgetCheckbox = gtk_check_button_new_with_label("");
 134         m_widgetLabel = GTK_BIN(m_widgetCheckbox)->child;
 135         m_widget = m_widgetCheckbox;
 136     }
 137     g_object_ref(m_widget);
 138     SetLabel( label );
 139
 140     g_signal_connect (m_widgetCheckbox, "toggled",
 141                       G_CALLBACK (gtk_checkbox_toggled_callback), this);
 142
 143     m_parent->DoAddChild( this );
 144
 145     PostCreation(size);
 146
 147     return true;
 148 }
 149
 150 void wxCheckBox::GTKDisableEvents()
 151 {
 152     g_signal_handlers_block_by_func(m_widgetCheckbox,
 153         (gpointer) gtk_checkbox_toggled_callback, this);
 154 }
 155
 156 void wxCheckBox::GTKEnableEvents()
 157 {
 158     g_signal_handlers_unblock_by_func(m_widgetCheckbox,
 159         (gpointer) gtk_checkbox_toggled_callback, this);
 160 }
 161
 162 void wxCheckBox::SetValue( bool state )
 163 {
 164     wxCHECK_RET( m_widgetCheckbox != NULL, wxT("invalid checkbox") );
 165
 166     if (state == GetValue())
 167         return;
 168
 169     GTKDisableEvents();
 170
 171     gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON(m_widgetCheckbox), state );
 172
 173     GTKEnableEvents();
 174 }
 175
 176 bool wxCheckBox::GetValue() const
 177 {
 178     wxCHECK_MSG( m_widgetCheckbox != NULL, false, wxT("invalid checkbox") );
 179
 180     return gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(m_widgetCheckbox));
 181 }
 182
 183 void wxCheckBox::DoSet3StateValue(wxCheckBoxState state)
 184 {
 185     SetValue(state != wxCHK_UNCHECKED);
 186     gtk_toggle_button_set_inconsistent(GTK_TOGGLE_BUTTON(m_widgetCheckbox),
 187                                        state == wxCHK_UNDETERMINED);
 188 }
 189
 190 wxCheckBoxState wxCheckBox::DoGet3StateValue() const
 191 {
 192     if (gtk_toggle_button_get_inconsistent(GTK_TOGGLE_BUTTON(m_widgetCheckbox)))
 193     {
 194         return wxCHK_UNDETERMINED;
 195     }
 196     else
 197     {
 198         return GetValue() ? wxCHK_CHECKED : wxCHK_UNCHECKED;
 199     }
 200 }
 201
 202 void wxCheckBox::SetLabel( const wxString& label )
 203 {
 204     wxCHECK_RET( m_widgetLabel != NULL, wxT("invalid checkbox") );
 205
 206     // save the label inside m_label in case user calls GetLabel() later
 207     wxControl::SetLabel(label);
 208
 209     GTKSetLabelForLabel(GTK_LABEL(m_widgetLabel), label);
 210 }
 211
 212 bool wxCheckBox::Enable( bool enable )
 213 {
 214     if (!base_type::Enable(enable))
 215         return false;
 216
 217     gtk_widget_set_sensitive( m_widgetLabel, enable );
 218
 219     if (enable)
 220         GTKFixSensitivity();
 221
 222     return true;
 223 }
 224
 225 void wxCheckBox::DoApplyWidgetStyle(GtkRcStyle *style)
 226 {
 227     gtk_widget_modify_style(m_widgetCheckbox, style);
 228     gtk_widget_modify_style(m_widgetLabel, style);
 229 }
 230
 231 GdkWindow *wxCheckBox::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 232 {
 233     return GTK_BUTTON(m_widgetCheckbox)->event_window;
 234 }
 235
 236 // static
 237 wxVisualAttributes
 238 wxCheckBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 239 {
 240     return GetDefaultAttributesFromGTKWidget(gtk_check_button_new);
 241 }
 242
 243 #endif