src/gtk/checkbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/checkbox.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Copyright:   (c) 1998 Robert Roebling
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 // For compilers that support precompilation, includes "wx.h".
  10 #include "wx/wxprec.h"
  11
  12 #if wxUSE_CHECKBOX
  13
  14 #include "wx/checkbox.h"
  15
  16 #include <gtk/gtk.h>
  17 #include "wx/gtk/private/gtk2-compat.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 (g_blockEventsOnDrag) return;
  33
  34     // Transitions for 3state checkbox must be done manually, GTK's checkbox
  35     // is 2state with additional "undetermined state" flag which isn't
  36     // changed automatically:
  37     if (cb->Is3State())
  38     {
  39         GtkToggleButton *toggle = GTK_TOGGLE_BUTTON(widget);
  40
  41         if (cb->Is3rdStateAllowedForUser())
  42         {
  43             // The 3 states cycle like this when clicked:
  44             // checked -> undetermined -> unchecked -> checked -> ...
  45             bool active = gtk_toggle_button_get_active(toggle) != 0;
  46             bool inconsistent = gtk_toggle_button_get_inconsistent(toggle) != 0;
  47
  48             cb->GTKDisableEvents();
  49
  50             if (!active && !inconsistent)
  51             {
  52                 // checked -> undetermined
  53                 gtk_toggle_button_set_active(toggle, true);
  54                 gtk_toggle_button_set_inconsistent(toggle, true);
  55             }
  56             else if (!active && inconsistent)
  57             {
  58                 // undetermined -> unchecked
  59                 gtk_toggle_button_set_inconsistent(toggle, false);
  60             }
  61             else if (active && !inconsistent)
  62             {
  63                 // unchecked -> checked
  64                 // nothing to do
  65             }
  66             else
  67             {
  68                 wxFAIL_MSG(wxT("3state wxCheckBox in unexpected state!"));
  69             }
  70
  71             cb->GTKEnableEvents();
  72         }
  73         else
  74         {
  75             // user's action unsets undetermined state:
  76             gtk_toggle_button_set_inconsistent(toggle, false);
  77         }
  78     }
  79
  80     wxCommandEvent event(wxEVT_CHECKBOX, cb->GetId());
  81     event.SetInt(cb->Get3StateValue());
  82     event.SetEventObject(cb);
  83     cb->HandleWindowEvent(event);
  84 }
  85 }
  86
  87 //-----------------------------------------------------------------------------
  88 // wxCheckBox
  89 //-----------------------------------------------------------------------------
  90
  91 wxCheckBox::wxCheckBox()
  92 {
  93     m_widgetCheckbox = NULL;
  94 }
  95
  96 wxCheckBox::~wxCheckBox()
  97 {
  98     if (m_widgetCheckbox && m_widgetCheckbox != m_widget)
  99         GTKDisconnect(m_widgetCheckbox);
 100 }
 101
 102 bool wxCheckBox::Create(wxWindow *parent,
 103                         wxWindowID id,
 104                         const wxString &label,
 105                         const wxPoint &pos,
 106                         const wxSize &size,
 107                         long style,
 108                         const wxValidator& validator,
 109                         const wxString &name )
 110 {
 111     WXValidateStyle( &style );
 112     if (!PreCreation( parent, pos, size ) ||
 113         !CreateBase( parent, id, pos, size, style, validator, name ))
 114     {
 115         wxFAIL_MSG( wxT("wxCheckBox creation failed") );
 116         return false;
 117     }
 118
 119     if ( style & wxALIGN_RIGHT )
 120     {
 121         // VZ: as I don't know a way to create a right aligned checkbox with
 122         //     GTK we will create a checkbox without label and a label at the
 123         //     left of it
 124         m_widgetCheckbox = gtk_check_button_new();
 125
 126         m_widgetLabel = gtk_label_new("");
 127         gtk_misc_set_alignment(GTK_MISC(m_widgetLabel), 0.0, 0.5);
 128
 129         m_widget = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
 130         gtk_box_pack_start(GTK_BOX(m_widget), m_widgetLabel, FALSE, FALSE, 3);
 131         gtk_box_pack_start(GTK_BOX(m_widget), m_widgetCheckbox, FALSE, FALSE, 3);
 132
 133         gtk_widget_show( m_widgetLabel );
 134         gtk_widget_show( m_widgetCheckbox );
 135     }
 136     else
 137     {
 138         m_widgetCheckbox = gtk_check_button_new_with_label("");
 139         m_widgetLabel = gtk_bin_get_child(GTK_BIN(m_widgetCheckbox));
 140         m_widget = m_widgetCheckbox;
 141     }
 142     g_object_ref(m_widget);
 143     SetLabel( label );
 144
 145     g_signal_connect (m_widgetCheckbox, "toggled",
 146                       G_CALLBACK (gtk_checkbox_toggled_callback), this);
 147
 148     m_parent->DoAddChild( this );
 149
 150     PostCreation(size);
 151
 152     return true;
 153 }
 154
 155 void wxCheckBox::GTKDisableEvents()
 156 {
 157     g_signal_handlers_block_by_func(m_widgetCheckbox,
 158         (gpointer) gtk_checkbox_toggled_callback, this);
 159 }
 160
 161 void wxCheckBox::GTKEnableEvents()
 162 {
 163     g_signal_handlers_unblock_by_func(m_widgetCheckbox,
 164         (gpointer) gtk_checkbox_toggled_callback, this);
 165 }
 166
 167 void wxCheckBox::SetValue( bool state )
 168 {
 169     wxCHECK_RET( m_widgetCheckbox != NULL, wxT("invalid checkbox") );
 170
 171     if (state == GetValue())
 172         return;
 173
 174     GTKDisableEvents();
 175
 176     gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON(m_widgetCheckbox), state );
 177
 178     GTKEnableEvents();
 179 }
 180
 181 bool wxCheckBox::GetValue() const
 182 {
 183     wxCHECK_MSG( m_widgetCheckbox != NULL, false, wxT("invalid checkbox") );
 184
 185     return gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(m_widgetCheckbox)) != 0;
 186 }
 187
 188 void wxCheckBox::DoSet3StateValue(wxCheckBoxState state)
 189 {
 190     SetValue(state != wxCHK_UNCHECKED);
 191     gtk_toggle_button_set_inconsistent(GTK_TOGGLE_BUTTON(m_widgetCheckbox),
 192                                        state == wxCHK_UNDETERMINED);
 193 }
 194
 195 wxCheckBoxState wxCheckBox::DoGet3StateValue() const
 196 {
 197     if (gtk_toggle_button_get_inconsistent(GTK_TOGGLE_BUTTON(m_widgetCheckbox)))
 198     {
 199         return wxCHK_UNDETERMINED;
 200     }
 201     else
 202     {
 203         return GetValue() ? wxCHK_CHECKED : wxCHK_UNCHECKED;
 204     }
 205 }
 206
 207 void wxCheckBox::SetLabel( const wxString& label )
 208 {
 209     wxCHECK_RET( m_widgetLabel != NULL, wxT("invalid checkbox") );
 210
 211     // save the label inside m_label in case user calls GetLabel() later
 212     wxControl::SetLabel(label);
 213
 214     GTKSetLabelForLabel(GTK_LABEL(m_widgetLabel), label);
 215 }
 216
 217 bool wxCheckBox::Enable( bool enable )
 218 {
 219     if (!base_type::Enable(enable))
 220         return false;
 221
 222     gtk_widget_set_sensitive( m_widgetLabel, enable );
 223
 224     if (enable)
 225         GTKFixSensitivity();
 226
 227     return true;
 228 }
 229
 230 void wxCheckBox::DoApplyWidgetStyle(GtkRcStyle *style)
 231 {
 232     GTKApplyStyle(m_widgetCheckbox, style);
 233     GTKApplyStyle(m_widgetLabel, style);
 234 }
 235
 236 GdkWindow *wxCheckBox::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 237 {
 238     return gtk_button_get_event_window(GTK_BUTTON(m_widgetCheckbox));
 239 }
 240
 241 // static
 242 wxVisualAttributes
 243 wxCheckBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 244 {
 245     return GetDefaultAttributesFromGTKWidget(gtk_check_button_new());
 246 }
 247
 248 #endif