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 #include "wx/gtk/private/gtk2-compat.h"
  19
  20 //-----------------------------------------------------------------------------
  21 // data
  22 //-----------------------------------------------------------------------------
  23
  24 extern bool           g_blockEventsOnDrag;
  25
  26 //-----------------------------------------------------------------------------
  27 // "clicked"
  28 //-----------------------------------------------------------------------------
  29
  30 extern "C" {
  31 static void gtk_checkbox_toggled_callback(GtkWidget *widget, wxCheckBox *cb)
  32 {
  33     if (g_blockEventsOnDrag) return;
  34
  35     // Transitions for 3state checkbox must be done manually, GTK's checkbox
  36     // is 2state with additional "undetermined state" flag which isn't
  37     // changed automatically:
  38     if (cb->Is3State())
  39     {
  40         GtkToggleButton *toggle = GTK_TOGGLE_BUTTON(widget);
  41
  42         if (cb->Is3rdStateAllowedForUser())
  43         {
  44             // The 3 states cycle like this when clicked:
  45             // checked -> undetermined -> unchecked -> checked -> ...
  46             bool active = gtk_toggle_button_get_active(toggle) != 0;
  47             bool inconsistent = gtk_toggle_button_get_inconsistent(toggle) != 0;
  48
  49             cb->GTKDisableEvents();
  50
  51             if (!active && !inconsistent)
  52             {
  53                 // checked -> undetermined
  54                 gtk_toggle_button_set_active(toggle, true);
  55                 gtk_toggle_button_set_inconsistent(toggle, true);
  56             }
  57             else if (!active && inconsistent)
  58             {
  59                 // undetermined -> unchecked
  60                 gtk_toggle_button_set_inconsistent(toggle, false);
  61             }
  62             else if (active && !inconsistent)
  63             {
  64                 // unchecked -> checked
  65                 // nothing to do
  66             }
  67             else
  68             {
  69                 wxFAIL_MSG(wxT("3state wxCheckBox in unexpected state!"));
  70             }
  71
  72             cb->GTKEnableEvents();
  73         }
  74         else
  75         {
  76             // user's action unsets undetermined state:
  77             gtk_toggle_button_set_inconsistent(toggle, false);
  78         }
  79     }
  80
  81     wxCommandEvent event(wxEVT_CHECKBOX, cb->GetId());
  82     event.SetInt(cb->Get3StateValue());
  83     event.SetEventObject(cb);
  84     cb->HandleWindowEvent(event);
  85 }
  86 }
  87
  88 //-----------------------------------------------------------------------------
  89 // wxCheckBox
  90 //-----------------------------------------------------------------------------
  91
  92 wxCheckBox::wxCheckBox()
  93 {
  94     m_widgetCheckbox = NULL;
  95 }
  96
  97 wxCheckBox::~wxCheckBox()
  98 {
  99     if (m_widgetCheckbox && m_widgetCheckbox != m_widget)
 100         GTKDisconnect(m_widgetCheckbox);
 101 }
 102
 103 bool wxCheckBox::Create(wxWindow *parent,
 104                         wxWindowID id,
 105                         const wxString &label,
 106                         const wxPoint &pos,
 107                         const wxSize &size,
 108                         long style,
 109                         const wxValidator& validator,
 110                         const wxString &name )
 111 {
 112     WXValidateStyle( &style );
 113     if (!PreCreation( parent, pos, size ) ||
 114         !CreateBase( parent, id, pos, size, style, validator, name ))
 115     {
 116         wxFAIL_MSG( wxT("wxCheckBox creation failed") );
 117         return false;
 118     }
 119
 120     if ( style & wxALIGN_RIGHT )
 121     {
 122         // VZ: as I don't know a way to create a right aligned checkbox with
 123         //     GTK we will create a checkbox without label and a label at the
 124         //     left of it
 125         m_widgetCheckbox = gtk_check_button_new();
 126
 127         m_widgetLabel = gtk_label_new("");
 128         gtk_misc_set_alignment(GTK_MISC(m_widgetLabel), 0.0, 0.5);
 129
 130         m_widget = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
 131         gtk_box_pack_start(GTK_BOX(m_widget), m_widgetLabel, FALSE, FALSE, 3);
 132         gtk_box_pack_start(GTK_BOX(m_widget), m_widgetCheckbox, FALSE, FALSE, 3);
 133
 134         gtk_widget_show( m_widgetLabel );
 135         gtk_widget_show( m_widgetCheckbox );
 136     }
 137     else
 138     {
 139         m_widgetCheckbox = gtk_check_button_new_with_label("");
 140         m_widgetLabel = gtk_bin_get_child(GTK_BIN(m_widgetCheckbox));
 141         m_widget = m_widgetCheckbox;
 142     }
 143     g_object_ref(m_widget);
 144     SetLabel( label );
 145
 146     g_signal_connect (m_widgetCheckbox, "toggled",
 147                       G_CALLBACK (gtk_checkbox_toggled_callback), this);
 148
 149     m_parent->DoAddChild( this );
 150
 151     PostCreation(size);
 152
 153     return true;
 154 }
 155
 156 void wxCheckBox::GTKDisableEvents()
 157 {
 158     g_signal_handlers_block_by_func(m_widgetCheckbox,
 159         (gpointer) gtk_checkbox_toggled_callback, this);
 160 }
 161
 162 void wxCheckBox::GTKEnableEvents()
 163 {
 164     g_signal_handlers_unblock_by_func(m_widgetCheckbox,
 165         (gpointer) gtk_checkbox_toggled_callback, this);
 166 }
 167
 168 void wxCheckBox::SetValue( bool state )
 169 {
 170     wxCHECK_RET( m_widgetCheckbox != NULL, wxT("invalid checkbox") );
 171
 172     if (state == GetValue())
 173         return;
 174
 175     GTKDisableEvents();
 176
 177     gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON(m_widgetCheckbox), state );
 178
 179     GTKEnableEvents();
 180 }
 181
 182 bool wxCheckBox::GetValue() const
 183 {
 184     wxCHECK_MSG( m_widgetCheckbox != NULL, false, wxT("invalid checkbox") );
 185
 186     return gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(m_widgetCheckbox)) != 0;
 187 }
 188
 189 void wxCheckBox::DoSet3StateValue(wxCheckBoxState state)
 190 {
 191     SetValue(state != wxCHK_UNCHECKED);
 192     gtk_toggle_button_set_inconsistent(GTK_TOGGLE_BUTTON(m_widgetCheckbox),
 193                                        state == wxCHK_UNDETERMINED);
 194 }
 195
 196 wxCheckBoxState wxCheckBox::DoGet3StateValue() const
 197 {
 198     if (gtk_toggle_button_get_inconsistent(GTK_TOGGLE_BUTTON(m_widgetCheckbox)))
 199     {
 200         return wxCHK_UNDETERMINED;
 201     }
 202     else
 203     {
 204         return GetValue() ? wxCHK_CHECKED : wxCHK_UNCHECKED;
 205     }
 206 }
 207
 208 void wxCheckBox::SetLabel( const wxString& label )
 209 {
 210     wxCHECK_RET( m_widgetLabel != NULL, wxT("invalid checkbox") );
 211
 212     // save the label inside m_label in case user calls GetLabel() later
 213     wxControl::SetLabel(label);
 214
 215     GTKSetLabelForLabel(GTK_LABEL(m_widgetLabel), label);
 216 }
 217
 218 bool wxCheckBox::Enable( bool enable )
 219 {
 220     if (!base_type::Enable(enable))
 221         return false;
 222
 223     gtk_widget_set_sensitive( m_widgetLabel, enable );
 224
 225     if (enable)
 226         GTKFixSensitivity();
 227
 228     return true;
 229 }
 230
 231 void wxCheckBox::DoApplyWidgetStyle(GtkRcStyle *style)
 232 {
 233     GTKApplyStyle(m_widgetCheckbox, style);
 234     GTKApplyStyle(m_widgetLabel, style);
 235 }
 236
 237 GdkWindow *wxCheckBox::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 238 {
 239     return gtk_button_get_event_window(GTK_BUTTON(m_widgetCheckbox));
 240 }
 241
 242 // static
 243 wxVisualAttributes
 244 wxCheckBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 245 {
 246     return GetDefaultAttributesFromGTKWidget(gtk_check_button_new());
 247 }
 248
 249 #endif