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 IMPLEMENT_DYNAMIC_CLASS(wxCheckBox,wxControl)
  94
  95 wxCheckBox::wxCheckBox()
  96 {
  97 }
  98
  99 bool wxCheckBox::Create(wxWindow *parent,
 100                         wxWindowID id,
 101                         const wxString &label,
 102                         const wxPoint &pos,
 103                         const wxSize &size,
 104                         long style,
 105                         const wxValidator& validator,
 106                         const wxString &name )
 107 {
 108     WXValidateStyle( &style );
 109     if (!PreCreation( parent, pos, size ) ||
 110         !CreateBase( parent, id, pos, size, style, validator, name ))
 111     {
 112         wxFAIL_MSG( wxT("wxCheckBox creation failed") );
 113         return false;
 114     }
 115
 116     if ( style & wxALIGN_RIGHT )
 117     {
 118         // VZ: as I don't know a way to create a right aligned checkbox with
 119         //     GTK we will create a checkbox without label and a label at the
 120         //     left of it
 121         m_widgetCheckbox = gtk_check_button_new();
 122
 123         m_widgetLabel = gtk_label_new("");
 124         gtk_misc_set_alignment(GTK_MISC(m_widgetLabel), 0.0, 0.5);
 125
 126         m_widget = gtk_hbox_new(FALSE, 0);
 127         gtk_box_pack_start(GTK_BOX(m_widget), m_widgetLabel, FALSE, FALSE, 3);
 128         gtk_box_pack_start(GTK_BOX(m_widget), m_widgetCheckbox, FALSE, FALSE, 3);
 129
 130         gtk_widget_show( m_widgetLabel );
 131         gtk_widget_show( m_widgetCheckbox );
 132     }
 133     else
 134     {
 135         m_widgetCheckbox = gtk_check_button_new_with_label("");
 136         m_widgetLabel = GTK_BIN(m_widgetCheckbox)->child;
 137         m_widget = m_widgetCheckbox;
 138     }
 139     g_object_ref(m_widget);
 140     SetLabel( label );
 141
 142     g_signal_connect (m_widgetCheckbox, "toggled",
 143                       G_CALLBACK (gtk_checkbox_toggled_callback), this);
 144
 145     m_parent->DoAddChild( this );
 146
 147     PostCreation(size);
 148
 149     return true;
 150 }
 151
 152 void wxCheckBox::GTKDisableEvents()
 153 {
 154     g_signal_handlers_block_by_func(m_widgetCheckbox,
 155         (gpointer) gtk_checkbox_toggled_callback, this);
 156 }
 157
 158 void wxCheckBox::GTKEnableEvents()
 159 {
 160     g_signal_handlers_unblock_by_func(m_widgetCheckbox,
 161         (gpointer) gtk_checkbox_toggled_callback, this);
 162 }
 163
 164 void wxCheckBox::SetValue( bool state )
 165 {
 166     wxCHECK_RET( m_widgetCheckbox != NULL, wxT("invalid checkbox") );
 167
 168     if (state == GetValue())
 169         return;
 170
 171     GTKDisableEvents();
 172
 173     gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON(m_widgetCheckbox), state );
 174
 175     GTKEnableEvents();
 176 }
 177
 178 bool wxCheckBox::GetValue() const
 179 {
 180     wxCHECK_MSG( m_widgetCheckbox != NULL, false, wxT("invalid checkbox") );
 181
 182     return gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(m_widgetCheckbox));
 183 }
 184
 185 void wxCheckBox::DoSet3StateValue(wxCheckBoxState state)
 186 {
 187     SetValue(state != wxCHK_UNCHECKED);
 188     gtk_toggle_button_set_inconsistent(GTK_TOGGLE_BUTTON(m_widgetCheckbox),
 189                                        state == wxCHK_UNDETERMINED);
 190 }
 191
 192 wxCheckBoxState wxCheckBox::DoGet3StateValue() const
 193 {
 194     if (gtk_toggle_button_get_inconsistent(GTK_TOGGLE_BUTTON(m_widgetCheckbox)))
 195     {
 196         return wxCHK_UNDETERMINED;
 197     }
 198     else
 199     {
 200         return GetValue() ? wxCHK_CHECKED : wxCHK_UNCHECKED;
 201     }
 202 }
 203
 204 void wxCheckBox::SetLabel( const wxString& label )
 205 {
 206     wxCHECK_RET( m_widgetLabel != NULL, wxT("invalid checkbox") );
 207
 208     // save the label inside m_label in case user calls GetLabel() later
 209     wxControl::SetLabel(label);
 210
 211     GTKSetLabelForLabel(GTK_LABEL(m_widgetLabel), label);
 212 }
 213
 214 bool wxCheckBox::Enable( bool enable )
 215 {
 216     if (!base_type::Enable(enable))
 217         return false;
 218
 219     gtk_widget_set_sensitive( m_widgetLabel, enable );
 220
 221     if (enable)
 222         GTKFixSensitivity();
 223
 224     return true;
 225 }
 226
 227 void wxCheckBox::DoApplyWidgetStyle(GtkRcStyle *style)
 228 {
 229     gtk_widget_modify_style(m_widgetCheckbox, style);
 230     gtk_widget_modify_style(m_widgetLabel, style);
 231 }
 232
 233 GdkWindow *wxCheckBox::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 234 {
 235     return GTK_BUTTON(m_widgetCheckbox)->event_window;
 236 }
 237
 238 // static
 239 wxVisualAttributes
 240 wxCheckBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 241 {
 242     return GetDefaultAttributesFromGTKWidget(gtk_check_button_new);
 243 }
 244
 245 #endif