ComboBoxSignalName

Emitted when the active item is changed.

The can be due to the user selecting a different item from the list, or due to a call to [methodGtk.ComboBox.set_active_iter]. It will also be emitted while typing into the entry of a combo box with an entry.

Signals that all holders of a reference to the widget should release the reference that they hold.

May result in finalization of the widget if all references are released.

This signal is not suitable for saving widget state.

Emitted when the text direction of a widget changes.

Emitted to allow changing how the text in a combo box’s entry is displayed.

See [propertyGtk.ComboBox:has-entry].

Connect a signal handler which returns an allocated string representing path. That string will then be used to set the text in the combo box’s entry. The default signal handler uses the text from the [propertyGtk.ComboBox:entry-text-column] model column.

Here’s an example signal handler which fetches data from the model and displays it in the entry.

static char *
format_entry_text_callback (GtkComboBox *combo,
                            const char *path,
                            gpointer     user_data)
{
  GtkTreeIter iter;
  GtkTreeModel model;
  double       value;

  model = gtk_combo_box_get_model (combo);

  gtk_tree_model_get_iter_from_string (model, &iter, path);
  gtk_tree_model_get (model, &iter,
                      THE_DOUBLE_VALUE_COLUMN, &value,
                      -1);

  return g_strdup_printf ("`g`", value);
}

Emitted when widget is hidden.

Emitted if keyboard navigation fails.

See [methodGtk.Widget.keynav_failed] for details.

Emitted when widget is going to be mapped.

A widget is mapped when the widget is visible (which is controlled with [propertyGtk.Widget:visible]) and all its parents up to the toplevel widget are also visible.

The map signal can be used to determine whether a widget will be drawn, for instance it can resume an animation that was stopped during the emission of [signalGtk.Widget::unmap].

Emitted when a widget is activated via a mnemonic.

The default handler for this signal activates widget if group_cycling is false, or just makes widget grab focus if group_cycling is true.

Emitted to move the active selection.

This is an keybinding signal.

Emitted when the focus is moved.

The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.

Note that getting this signal doesn’t itself guarantee that the value of the property has actually changed. When it is emitted is determined by the derived GObject class. If the implementor did not create the property with G_PARAM_EXPLICIT_NOTIFY, then any call to g_object_set_property() results in notify being emitted, even if the new value is the same as the old. If they did pass G_PARAM_EXPLICIT_NOTIFY, then this signal is emitted only when they explicitly call g_object_notify() or g_object_notify_by_pspec(), and common practice is to do that only when the value has actually changed.

This signal is typically used to obtain change notification for a single property, by specifying the property name as a detail in the g_signal_connect() call, like this:

(C Language Example):

g_signal_connect (text_view->buffer, "notify::paste-target-list",
                  G_CALLBACK (gtk_text_view_target_list_notify),
                  text_view)

It is important to note that you must use canonical parameter names as detail strings for the notify signal.

Emitted to popdown the combo box list.

This is an keybinding signal.

The default bindings for this signal are Alt+Up and Escape.

Emitted to popup the combo box list.

This is an keybinding signal.

The default binding for this signal is Alt+Down.

Emitted when the widgets tooltip is about to be shown.

This happens when the [propertyGtk.Widget:has-tooltip] property is true and the hover timeout has expired with the cursor hovering “above” widget; or emitted when widget got focus in keyboard mode.

Using the given coordinates, the signal handler should determine whether a tooltip should be shown for widget. If this is the case true should be returned, false otherwise. Note that if keyboard_mode is true, the values of x and y are undefined and should not be used.

The signal handler is free to manipulate tooltip with the therefore destined function calls.

Emitted when widget is associated with a GdkSurface.

This means that [methodGtk.Widget.realize] has been called or the widget has been mapped (that is, it is going to be drawn).

Emitted when widget is shown.

Emitted when the widget state changes.

See [methodGtk.Widget.get_state_flags].

Emitted when widget is going to be unmapped.

A widget is unmapped when either it or any of its parents up to the toplevel widget have been set as hidden.

As unmap indicates that a widget will not be shown any longer, it can be used to, for example, stop an animation on the widget.

Emitted when the GdkSurface associated with widget is destroyed.

This means that [methodGtk.Widget.unrealize] has been called or the widget has been unmapped (that is, it is going to be hidden).

The item which is currently active.

If the model is a non-flat treemodel, and the active item is not an immediate child of the root of the tree, this property has the value gtk_tree_path_get_indices (path)[0], where path is the [structGtk.TreePath] of the active item.

The value of the ID column of the active row.

Whether the dropdown button is sensitive when the model is empty.

Whether the widget or any of its descendents can accept the input focus.

This property is meant to be set by widget implementations, typically in their instance init function.

Whether the widget can receive pointer events.

The child widget.

A list of css classes applied to this widget.

The name of this widget in the CSS tree.

This property is meant to be set by widget implementations, typically in their instance init function.

The cursor used by widget.

The model column to associate with strings from the entry.

This is property only relevant if the combo was created with [propertyGtk.ComboBox:has-entry] is true.

Whether the widget should grab focus when it is clicked with the mouse.

This property is only relevant for widgets that can take focus.

Whether this widget itself will accept the input focus.

How to distribute horizontal space if widget gets extra space.

Whether the widget is the default widget.

Whether the combo box has an entry.

Whether the widget has the input focus.

The has-frame property controls whether a frame is drawn around the entry.

Enables or disables the emission of the query-tooltip signal on widget.

A value of true indicates that widget can have a tooltip, in this case the widget will be queried using [signalGtk.Widget::query-tooltip] to determine whether it will provide a tooltip or not.

Override for height request of the widget.

If this is -1, the natural request will be used.

Whether to expand horizontally.

Whether to use the hexpand property.

The model column that provides string IDs for the values in the model, if != -1.

The GtkLayoutManager instance to use to compute the preferred size of the widget, and allocate its children.

This property is meant to be set by widget implementations, typically in their instance init function.

Margin on bottom side of widget.

This property adds margin outside of the widget’s normal size request, the margin will be added in addition to the size from [methodGtk.Widget.set_size_request] for example.

Margin on end of widget, horizontally.

This property supports left-to-right and right-to-left text directions.

This property adds margin outside of the widget’s normal size request, the margin will be added in addition to the size from [methodGtk.Widget.set_size_request] for example.

Margin on start of widget, horizontally.

This property supports left-to-right and right-to-left text directions.

This property adds margin outside of the widget’s normal size request, the margin will be added in addition to the size from [methodGtk.Widget.set_size_request] for example.

Margin on top side of widget.

This property adds margin outside of the widget’s normal size request, the margin will be added in addition to the size from [methodGtk.Widget.set_size_request] for example.

The model from which the combo box takes its values.

The name of the widget.

The requested opacity of the widget.

How content outside the widget’s content area is treated.

This property is meant to be set by widget implementations, typically in their instance init function.

The parent widget of this widget.

Whether the popup’s width should be a fixed width matching the allocated width of the combo box.

Whether the combo boxes dropdown is popped up.

Note that this property is mainly useful, because it allows you to connect to notifypopup-shown.

Whether the widget will receive the default action when it is focused.

The GtkRoot widget of the widget tree containing this widget.

This will be nil if the widget is not contained in a root widget.

The scale factor of the widget.

Whether the widget responds to input.

Sets the text of tooltip to be the given string, which is marked up with Pango markup.

Also see [methodGtk.Tooltip.set_markup].

This is a convenience property which will take care of getting the tooltip shown if the given string is not nil: [propertyGtk.Widget:has-tooltip] will automatically be set to true and there will be taken care of [signalGtk.Widget::query-tooltip] in the default signal handler.

Note that if both [propertyGtk.Widget:tooltip-text] and [propertyGtk.Widget:tooltip-markup] are set, the last one wins.

Sets the text of tooltip to be the given string.

Also see [methodGtk.Tooltip.set_text].

This is a convenience property which will take care of getting the tooltip shown if the given string is not nil: [propertyGtk.Widget:has-tooltip] will automatically be set to true and there will be taken care of [signalGtk.Widget::query-tooltip] in the default signal handler.

Note that if both [propertyGtk.Widget:tooltip-text] and [propertyGtk.Widget:tooltip-markup] are set, the last one wins.

How to distribute vertical space if widget gets extra space.

Whether to expand vertically.

Whether to use the vexpand property.

Whether the widget is visible.

Override for width request of the widget.

If this is -1, the natural request will be used.