|  | 
|  | Tooltip (Tooltip && src) noexcept | 
|  | 
| Tooltip & | operator= (Tooltip && src) noexcept | 
|  | 
|  | ~Tooltip () noexcept override | 
|  | 
| GtkTooltip * | gobj () | 
|  | Provides access to the underlying C GObject. 
 | 
|  | 
| const GtkTooltip * | gobj () const | 
|  | Provides access to the underlying C GObject. 
 | 
|  | 
| GtkTooltip * | gobj_copy () | 
|  | Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. 
 | 
|  | 
| void | set_markup (const Glib::ustring & markup) | 
|  | Sets the text of the tooltip to be markup. 
 | 
|  | 
| void | unset_markup () | 
|  | Hide the label. 
 | 
|  | 
| void | set_text (const Glib::ustring & text) | 
|  | Sets the text of the tooltip to be text. 
 | 
|  | 
| void | unset_text () | 
|  | Hide the label. 
 | 
|  | 
| void | set_icon (const Glib::RefPtr< Gdk::Paintable > & paintable) | 
|  | Sets the icon of the tooltip (which is in front of the text) to be paintable. 
 | 
|  | 
| void | set_icon (const Glib::RefPtr< Gio::Icon > & gicon) | 
|  | Sets the icon of the tooltip (which is in front of the text) to be the icon indicated by gicon with the size indicated by size. 
 | 
|  | 
| void | set_icon (const Glib::ustring & icon_name) | 
|  | Sets the icon of the tooltip (which is in front of the text) to be the icon indicated by icon_name with the size indicated by size. 
 | 
|  | 
| void | unset_icon () | 
|  | Hide the image. 
 | 
|  | 
| void | set_custom (Widget & custom_widget) | 
|  | Replaces the widget packed into the tooltip with custom_widget. 
 | 
|  | 
| void | unset_custom () | 
|  | Remove the custom widget. 
 | 
|  | 
| void | set_tip_area (const Gdk::Rectangle & rect) | 
|  | Sets the area of the widget, where the contents of this tooltip apply, to be rect (in widget coordinates). 
 | 
|  | 
|  | Object (const Object &)=delete | 
|  | 
| Object & | operator= (const Object &)=delete | 
|  | 
|  | Object (Object &&src) noexcept | 
|  | 
| Object & | operator= (Object &&src) noexcept | 
|  | 
| void * | get_data (const QueryQuark &key) | 
|  | 
| void | set_data (const Quark &key, void *data) | 
|  | 
| void | set_data_with_c_callback (const Quark &key, void *data, GDestroyNotify notify) | 
|  | 
| void | set_data (const Quark &key, void *data, DestroyNotify notify) | 
|  | 
| void | remove_data (const QueryQuark &quark) | 
|  | 
| void * | steal_data (const QueryQuark &quark) | 
|  | 
| Glib::RefPtr< Glib::Object > | wrap (GObject *object, bool take_copy=false) | 
|  | 
|  | ObjectBase (const ObjectBase &)=delete | 
|  | 
| ObjectBase & | operator= (const ObjectBase &)=delete | 
|  | 
| void | set_property_value (const Glib::ustring &property_name, const Glib::ValueBase &value) | 
|  | 
| void | get_property_value (const Glib::ustring &property_name, Glib::ValueBase &value) const | 
|  | 
| void | set_property (const Glib::ustring &property_name, const PropertyType &value) | 
|  | 
| void | get_property (const Glib::ustring &property_name, PropertyType &value) const | 
|  | 
| PropertyType | get_property (const Glib::ustring &property_name) const | 
|  | 
| sigc::connection | connect_property_changed (const Glib::ustring &property_name, const sigc::slot< void()> &slot) | 
|  | 
| sigc::connection | connect_property_changed (const Glib::ustring &property_name, sigc::slot< void()> &&slot) | 
|  | 
| void | freeze_notify () | 
|  | 
| void | thaw_notify () | 
|  | 
| virtual void | reference () const | 
|  | 
| virtual void | unreference () const | 
|  | 
| GObject * | gobj () | 
|  | 
| const GObject * | gobj () const | 
|  | 
| GObject * | gobj_copy () const | 
|  | 
Add tips to your widgets. 
Basic tooltips can be realized simply by using set_tooltip_text() or set_tooltip_markup() without any explicit tooltip object.
When you need a tooltip with a little more fancy contents, like adding an image, or you want the tooltip to have different contents per Gtk::TreeView row or cell, you will have to do a little more work:
- Call Gtk::Widget:set_has_tooltip(); this will make GTK+ monitor the widget for motion and related events which are needed to determine when and where to show a tooltip.
- Connect to Gtk::Widget::signal_query_tooltip(). This signal will be emitted when a tooltip is supposed to be shown. One of the arguments passed to the signal handler is a Gtk::Tooltip object. This is the object that we are about to display as a tooltip, and can be manipulated in your callback using functions like Gtk::Tooltip::set_icon(). There are functions for setting the tooltip's markup, setting an image from a named icon, or even putting in a custom widget.
- Return true from your query-tooltip handler. This causes the tooltip to be show. If you return false, it will not be shown.