GtkTooltip

## 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_icon_from_icon_name (GtkTooltip *tooltip,
                                                             const gchar *icon_name,
                                                             GtkIconSize size);
    void                gtk_tooltip_set_icon_from_gicon     (GtkTooltip *tooltip,
                                                             GIcon *gicon,
                                                             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,
                                                             const 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`. [allow-none]

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`. [allow-none]

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`. [allow-none]

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 id, or `NULL`. [allow-none]
`size` : | a stock icon size. [type int]

Since 2.12

### gtk_tooltip_set_icon_from_icon_name ()

    void                gtk_tooltip_set_icon_from_icon_name (GtkTooltip *tooltip,
                                                             const gchar *icon_name,
                                                             GtkIconSize size);

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.

`tooltip` : | a GtkTooltip
`icon_name` : | an icon name, or `NULL`. [allow-none]
`size` : | a stock icon size. [type int]

Since 2.14

### gtk_tooltip_set_icon_from_gicon ()

    void                gtk_tooltip_set_icon_from_gicon     (GtkTooltip *tooltip,
                                                             GIcon *gicon,
                                                             GtkIconSize size);

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.

`tooltip` : | a GtkTooltip
`gicon` : | a GIcon representing the icon, or `NULL`. [allow-none]
`size` : | a stock icon size. [type int]

Since 2.20

### 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()`.

`tooltip` : | a GtkTooltip
`custom_widget` : | a GtkWidget, or `NULL` to unset the old custom widget. [allow-none]

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,
                                                             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()`.

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

Since 2.12