GtkTooltip

GtkTooltip — Add tips to your widgets

Synopsis


#include <gtk/gtk.h>

                    GtkTooltip;
void                gtk_tooltip_set_markup              (GtkTooltip *tooltip,
                                                         const gchar *markup);
void                gtk_tooltip_set_text                (GtkTooltip *tooltip,
                                                         const gchar *text);
void                gtk_tooltip_set_icon                (GtkTooltip *tooltip,
                                                         GdkPixbuf *pixbuf);
void                gtk_tooltip_set_icon_from_stock     (GtkTooltip *tooltip,
                                                         const gchar *stock_id,
                                                         GtkIconSize size);
void                gtk_tooltip_set_custom              (GtkTooltip *tooltip,
                                                         GtkWidget *custom_widget);
void                gtk_tooltip_trigger_tooltip_query   (GdkDisplay *display);
void                gtk_tooltip_set_tip_area            (GtkTooltip *tooltip,
                                                         GdkRectangle *rect);

Object Hierarchy

  GObject
   +----GtkTooltip

Description

GtkTooltip belongs to the new tooltips API that was introduced in GTK+ 2.12 and which deprecates the old GtkTooltips API.

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 stock 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.

Details

GtkTooltip

typedef struct _GtkTooltip GtkTooltip;

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.

`tooltip` :	a GtkTooltip
`markup` :	a markup string (see Pango markup format) or `NULL`

Since 2.12

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().

`tooltip` :	a GtkTooltip
`text` :	a text string or `NULL`

Since 2.12

gtk_tooltip_set_icon ()

void                gtk_tooltip_set_icon                (GtkTooltip *tooltip,
                                                         GdkPixbuf *pixbuf);

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

`tooltip` :	a GtkTooltip
`pixbuf` :	a GdkPixbuf, or `NULL`

Since 2.12

gtk_tooltip_set_icon_from_stock ()

void                gtk_tooltip_set_icon_from_stock     (GtkTooltip *tooltip,
                                                         const gchar *stock_id,
                                                         GtkIconSize size);

Sets the icon of the tooltip (which is in front of the text) to be the stock item indicated by stock_id with the size indicated by size. If stock_id is NULL, the image will be hidden.

`tooltip` :	a GtkTooltip
`stock_id` :	a stock icon name, or `NULL`
`size` :	a stock icon size

Since 2.12

gtk_tooltip_set_custom ()

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

Replaces the widget packed into the tooltip with custom_widget. 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().

`tooltip` :	a GtkTooltip
`custom_widget` :	a GtkWidget

Since 2.12

gtk_tooltip_trigger_tooltip_query ()

void                gtk_tooltip_trigger_tooltip_query   (GdkDisplay *display);

Triggers a new tooltip query on display, in order to update the current visible tooltip, or to show/hide the current tooltip. This function is useful to call when, for example, the state of the widget changed by a key press.

display : a GdkDisplay

Since 2.12

gtk_tooltip_set_tip_area ()

void                gtk_tooltip_set_tip_area            (GtkTooltip *tooltip,
                                                         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().

`tooltip` :	a GtkTooltip
`rect` :	a GdkRectangle

Since 2.12