-#ifdef __WXGTK20__
- // Transitions for 3state checkbox must be done manually, GTK's checkbox
- // is 2state with additional "undetermined state" flag which isn't
- // changed automatically:
- if (cb->Is3State())
- {
- GtkToggleButton *toggle = GTK_TOGGLE_BUTTON(widget);
-
- if (cb->Is3rdStateAllowedForUser())
- {
- // The 3 states cycle like this when clicked:
- // checked -> undetermined -> unchecked -> checked -> ...
- bool active = gtk_toggle_button_get_active(toggle);
- bool inconsistent = gtk_toggle_button_get_inconsistent(toggle);
-
- cb->m_blockEvent = true;
-
- if (!active && !inconsistent)
- {
- // checked -> undetermined
- gtk_toggle_button_set_active(toggle, true);
- gtk_toggle_button_set_inconsistent(toggle, true);
- }
- else if (!active && inconsistent)
- {
- // undetermined -> unchecked
- gtk_toggle_button_set_inconsistent(toggle, false);
- }
- else if (active && !inconsistent)
- {
- // unchecked -> checked
- // nothing to do
- }
- else
- {
- wxFAIL_MSG(_T("3state wxCheckBox in unexpected state!"));
- }
-
- cb->m_blockEvent = false;
- }
- else
- {
- // user's action unsets undetermined state:
- gtk_toggle_button_set_inconsistent(toggle, false);
- }
- }
-#endif