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 "wx/gtk/private.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_isIdle) wxapp_install_idle_handler();
  33
  34     if (!cb->m_hasVMT) return;
  35
  36     if (g_blockEventsOnDrag) return;
  37
  38     if (cb->m_blockEvent) return;
  39
  40     // Transitions for 3state checkbox must be done manually, GTK's checkbox
  41     // is 2state with additional "undetermined state" flag which isn't
  42     // changed automatically:
  43     if (cb->Is3State())
  44     {
  45         GtkToggleButton *toggle = GTK_TOGGLE_BUTTON(widget);
  46
  47         if (cb->Is3rdStateAllowedForUser())
  48         {
  49             // The 3 states cycle like this when clicked:
  50             // checked -> undetermined -> unchecked -> checked -> ...
  51             bool active = gtk_toggle_button_get_active(toggle);
  52             bool inconsistent = gtk_toggle_button_get_inconsistent(toggle);
  53
  54             cb->m_blockEvent = true;
  55
  56             if (!active && !inconsistent)
  57             {
  58                 // checked -> undetermined
  59                 gtk_toggle_button_set_active(toggle, true);
  60                 gtk_toggle_button_set_inconsistent(toggle, true);
  61             }
  62             else if (!active && inconsistent)
  63             {
  64                 // undetermined -> unchecked
  65                 gtk_toggle_button_set_inconsistent(toggle, false);
  66             }
  67             else if (active && !inconsistent)
  68             {
  69                 // unchecked -> checked
  70                 // nothing to do
  71             }
  72             else
  73             {
  74                 wxFAIL_MSG(_T("3state wxCheckBox in unexpected state!"));
  75             }
  76
  77             cb->m_blockEvent = false;
  78         }
  79         else
  80         {
  81             // user's action unsets undetermined state:
  82             gtk_toggle_button_set_inconsistent(toggle, false);
  83         }
  84     }
  85
  86     wxCommandEvent event(wxEVT_COMMAND_CHECKBOX_CLICKED, cb->GetId());
  87     event.SetInt(cb->Get3StateValue());
  88     event.SetEventObject(cb);
  89     cb->GetEventHandler()->ProcessEvent(event);
  90 }
  91 }
  92
  93 //-----------------------------------------------------------------------------
  94 // wxCheckBox
  95 //-----------------------------------------------------------------------------
  96
  97 IMPLEMENT_DYNAMIC_CLASS(wxCheckBox,wxControl)
  98
  99 wxCheckBox::wxCheckBox()
 100 {
 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     m_needParent = true;
 113     m_acceptsFocus = true;
 114     m_blockEvent = false;
 115
 116     if (!PreCreation( parent, pos, size ) ||
 117         !CreateBase( parent, id, pos, size, style, validator, name ))
 118     {
 119         wxFAIL_MSG( wxT("wxCheckBox creation failed") );
 120         return false;
 121     }
 122
 123     wxASSERT_MSG( (style & wxCHK_ALLOW_3RD_STATE_FOR_USER) == 0 ||
 124                   (style & wxCHK_3STATE) != 0,
 125                   wxT("Using wxCHK_ALLOW_3RD_STATE_FOR_USER")
 126                   wxT(" style flag for a 2-state checkbox is useless") );
 127
 128     if ( style & wxALIGN_RIGHT )
 129     {
 130         // VZ: as I don't know a way to create a right aligned checkbox with
 131         //     GTK we will create a checkbox without label and a label at the
 132         //     left of it
 133         m_widgetCheckbox = gtk_check_button_new();
 134
 135         m_widgetLabel = gtk_label_new("");
 136         gtk_misc_set_alignment(GTK_MISC(m_widgetLabel), 0.0, 0.5);
 137
 138         m_widget = gtk_hbox_new(FALSE, 0);
 139         gtk_box_pack_start(GTK_BOX(m_widget), m_widgetLabel, FALSE, FALSE, 3);
 140         gtk_box_pack_start(GTK_BOX(m_widget), m_widgetCheckbox, FALSE, FALSE, 3);
 141
 142         gtk_widget_show( m_widgetLabel );
 143         gtk_widget_show( m_widgetCheckbox );
 144     }
 145     else
 146     {
 147         m_widgetCheckbox = gtk_check_button_new_with_label("");
 148         m_widgetLabel = GTK_BIN(m_widgetCheckbox)->child;
 149         m_widget = m_widgetCheckbox;
 150     }
 151     SetLabel( label );
 152
 153     g_signal_connect (m_widgetCheckbox, "toggled",
 154                       G_CALLBACK (gtk_checkbox_toggled_callback), this);
 155
 156     m_parent->DoAddChild( this );
 157
 158     PostCreation(size);
 159
 160     return true;
 161 }
 162
 163 void wxCheckBox::SetValue( bool state )
 164 {
 165     wxCHECK_RET( m_widgetCheckbox != NULL, wxT("invalid checkbox") );
 166
 167     if (state == GetValue())
 168         return;
 169
 170     m_blockEvent = true;
 171
 172     gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON(m_widgetCheckbox), state );
 173
 174     m_blockEvent = false;
 175 }
 176
 177 bool wxCheckBox::GetValue() const
 178 {
 179     wxCHECK_MSG( m_widgetCheckbox != NULL, false, wxT("invalid checkbox") );
 180
 181     return gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(m_widgetCheckbox));
 182 }
 183
 184 void wxCheckBox::DoSet3StateValue(wxCheckBoxState state)
 185 {
 186     SetValue(state != wxCHK_UNCHECKED);
 187     gtk_toggle_button_set_inconsistent(GTK_TOGGLE_BUTTON(m_widgetCheckbox),
 188                                        state == wxCHK_UNDETERMINED);
 189 }
 190
 191 wxCheckBoxState wxCheckBox::DoGet3StateValue() const
 192 {
 193     if (gtk_toggle_button_get_inconsistent(GTK_TOGGLE_BUTTON(m_widgetCheckbox)))
 194     {
 195         return wxCHK_UNDETERMINED;
 196     }
 197     else
 198     {
 199         return GetValue() ? wxCHK_CHECKED : wxCHK_UNCHECKED;
 200     }
 201 }
 202
 203 void wxCheckBox::SetLabel( const wxString& label )
 204 {
 205     wxCHECK_RET( m_widgetLabel != NULL, wxT("invalid checkbox") );
 206
 207     GTKSetLabelForLabel(GTK_LABEL(m_widgetLabel), label);
 208 }
 209
 210 bool wxCheckBox::Enable( bool enable )
 211 {
 212     if ( !wxControl::Enable( enable ) )
 213         return false;
 214
 215     gtk_widget_set_sensitive( m_widgetLabel, enable );
 216
 217     return true;
 218 }
 219
 220 void wxCheckBox::DoApplyWidgetStyle(GtkRcStyle *style)
 221 {
 222     gtk_widget_modify_style(m_widgetCheckbox, style);
 223     gtk_widget_modify_style(m_widgetLabel, style);
 224 }
 225
 226 GdkWindow *wxCheckBox::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 227 {
 228     return GTK_BUTTON(m_widgetCheckbox)->event_window;
 229 }
 230
 231 wxSize wxCheckBox::DoGetBestSize() const
 232 {
 233     return wxControl::DoGetBestSize();
 234 }
 235
 236 // static
 237 wxVisualAttributes
 238 wxCheckBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 239 {
 240     return GetDefaultAttributesFromGTKWidget(gtk_check_button_new);
 241 }
 242
 243 #endif