GtkTooltip
Add tips to your widgets
#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 #GtkWidget: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 #GtkWidget::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 #GtkWidget:has-tooltip and connect to #GtkWidget::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.
@tooltip:
@markup:
@tooltip:
@text:
@tooltip:
@pixbuf:
@tooltip:
@stock_id:
@size:
@tooltip:
@icon_name:
@size:
@tooltip:
@custom_widget:
@display:
@tooltip:
@rect: