GtkTooltip

GtkTooltip — Add tips to your widgets

Types and Values

Object Hierarchy

    GObject
    ╰── GtkTooltip

Includes

#include <gtk/gtk.h>

Description

Basic tooltips can be realized simply by using gtk_widget_set_tooltip_text() or gtk_widget_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 GtkTreeView row or cell, you will have to do a little more work:

  • Set the “has-tooltip” property to TRUE, 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 the “query-tooltip” signal. This signal will be emitted when a tooltip is supposed to be shown. One of the arguments passed to the signal handler is a GtkTooltip 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.

In the probably rare case where you want to have even more control over the tooltip that is about to be shown, you can set your own GtkWindow which will be used as tooltip window. This works as follows:

  • Set “has-tooltip” and connect to “query-tooltip” as before. Use gtk_widget_set_tooltip_window() to set a GtkWindow created by you as tooltip window.

  • In the “query-tooltip” callback you can access your window using gtk_widget_get_tooltip_window() and manipulate as you wish. The semantics of the return value are exactly as before, return TRUE to show the window, FALSE to not show it.

Functions

gtk_tooltip_set_markup ()

void
gtk_tooltip_set_markup (GtkTooltip *tooltip,
                        const gchar *markup);

Sets the text of the tooltip to be markup , which is marked up with the Pango text markup language. If markup is NULL, the label will be hidden.

Parameters

tooltip

a GtkTooltip

 

markup

a markup string (see Pango markup format) or NULL.

[allow-none]

gtk_tooltip_set_text ()

void
gtk_tooltip_set_text (GtkTooltip *tooltip,
                      const gchar *text);

Sets the text of the tooltip to be text . If text is NULL, the label will be hidden. See also gtk_tooltip_set_markup().

Parameters

tooltip

a GtkTooltip

 

text

a text string or NULL.

[allow-none]

gtk_tooltip_set_icon ()

void
gtk_tooltip_set_icon (GtkTooltip *tooltip,
                      GdkPaintable *paintable);

Sets the icon of the tooltip (which is in front of the text) to be paintable . If paintable is NULL, the image will be hidden.

Parameters

tooltip

a GtkTooltip

 

paintable

a GdkPaintable, or NULL.

[allow-none]

gtk_tooltip_set_icon_from_icon_name ()

void
gtk_tooltip_set_icon_from_icon_name (GtkTooltip *tooltip,
                                     const gchar *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 . If icon_name is NULL, the image will be hidden.

Parameters

tooltip

a GtkTooltip

 

icon_name

an icon name, or NULL.

[allow-none]

gtk_tooltip_set_icon_from_gicon ()

void
gtk_tooltip_set_icon_from_gicon (GtkTooltip *tooltip,
                                 GIcon *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 . If gicon is NULL, the image will be hidden.

Parameters

tooltip

a GtkTooltip

 

gicon

a GIcon representing the icon, or NULL.

[allow-none]

gtk_tooltip_set_custom ()

void
gtk_tooltip_set_custom (GtkTooltip *tooltip,
                        GtkWidget *custom_widget);

Replaces the widget packed into the tooltip with custom_widget . custom_widget does not get destroyed when the tooltip goes away. By default a box with a GtkImage and GtkLabel is embedded in the tooltip, which can be configured using gtk_tooltip_set_markup() and gtk_tooltip_set_icon().

Parameters

tooltip

a GtkTooltip

 

custom_widget

a GtkWidget, or NULL to unset the old custom widget.

[allow-none]

gtk_tooltip_set_tip_area ()

void
gtk_tooltip_set_tip_area (GtkTooltip *tooltip,
                          const GdkRectangle *rect);

Sets the area of the widget, where the contents of this tooltip apply, to be rect (in widget coordinates). This is especially useful for properly setting tooltips on GtkTreeView rows and cells, GtkIconViews, etc.

For setting tooltips on GtkTreeView, please refer to the convenience functions for this: gtk_tree_view_set_tooltip_row() and gtk_tree_view_set_tooltip_cell().

Parameters

tooltip

a GtkTooltip

 

rect

a GdkRectangle

 

Types and Values

GtkTooltip

typedef struct _GtkTooltip GtkTooltip;