GtkTooltips
Add tips to your widgets.
Tooltips are the messages that appear next to a widget when the mouse pointer is held over it for a short amount of time. They are especially helpful for adding more verbose descriptions of things such as buttons in a toolbar.
An individual tooltip belongs to a group of tooltips. A group is created with a call to gtk_tooltips_new(). Every tooltip in the group can then be turned off with a call to gtk_tooltips_disable() and enabled with gtk_tooltips_enable().
The length of time the user must keep the mouse over a widget before the tip is shown, can be altered with gtk_tooltips_set_delay(). This is set on a 'per group of tooltips' basis.
To assign a tip to a particular #GtkWidget, gtk_tooltips_set_tip() is used.
Tooltips can only be set on widgets which have their own X window.
To check if a widget has its own window use 'GTK_WIDGET_NO_WINDOW (widget)'.
To add a tooltip to a widget that doesn't have its own window, place the
widget inside a #GtkEventBox and add a tooltip to that instead.
The default appearance of all tooltips in a program is determined by the current gtk theme that the user has selected.
Information about the tooltip (if any) associated with an arbitrary widget can be retrieved using gtk_tooltips_data_get().
Adding tooltips to buttons.
GtkWidget *load_button, *save_button, *hbox;
GtkTooltips *button_bar_tips;
button_bar_tips = gtk_tooltips_new();
/* Create the buttons and pack them into a #GtkHBox */
hbox = gtk_hbox_new(TRUE, 2);
load_button = gtk_button_new_with_label("Load a file");
gtk_box_pack_start(GTK_BOX (hbox), load_button, TRUE, TRUE, 2);
gtk_widget_show(load_button);
save_button = gtk_button_new_with_label("Save a file");
gtk_box_pack_start(GTK_BOX (hbox), save_button, TRUE, TRUE, 2);
gtk_widget_show(save_button);
gtk_widget_show(hbox);
/* Add the tips */
gtk_tooltips_set_tip(GTK_TOOLTIPS (button_bar_tips), load_button,
"Load a new document into this window",
"Requests the filename of a document.
This will then be loaded into the current
window, replacing the contents of whatever
is already loaded.");
gtk_tooltips_set_tip(GTK_TOOLTIPS (button_bar_tips), save_button,
"Saves the current document to a file",
"If you have saved the document previously,
then the new version will be saved over the
old one. Otherwise, you will be prompted for
a filename.");
#GtkToolbar
Create groups of widgets with their own tooltips.
#GtkTipsQuery
Query tooltips to create context-sensitive help.
Holds information about a group of tooltips. Fields should be changed using the functions provided, rather than directly accessing the struct's members.
tooltips is the #GtkTooltips group that this tooltip belongs to. widget is the #GtkWidget that this tooltip data is associated with. tip_text is a string containing the tooltip message itself.
tip_private is a string that is not shown as the default tooltip. Instead, this message may be more informative and go towards forming a context-sensitive help system for your application. (FIXME: how to actually "switch on" private tips?)
@tooltips:
@widget:
@tip_text:
@tip_private:
Creates an empty group of tooltips. This function initialises a #GtkTooltips structure. Without at least one such structure, you can not add tips to your application.
@Returns: a new #GtkTooltips group for you to use.
Allows the user to see your tooltips as they navigate your application.
@tooltips: a #GtkTooltips.
Causes all tooltips in @tooltips to become inactive. Any widgets that have tips associated with that group will no longer display their tips until they are enabled again with gtk_tooltips_enable().
@tooltips: a #GtkTooltips.
Sets the time between the user moving the mouse over a widget and the widget's tooltip appearing.
@tooltips: a #GtkTooltips.
@delay: an integer value representing seconds (FIXME: double-check this).
Adds a tooltip containing the message @tip_text to the specified #GtkWidget.
@tooltips: a #GtkTooltips.
@widget: the #GtkWidget you wish to associate the tip with.
@tip_text: a string containing the tip itself.
@tip_private: a string of any further information that may be useful if the user gets stuck.
Retrieves any #GtkTooltipsData previously associated with the given widget.
@widget: a #GtkWidget.
@Returns: a #GtkTooltipsData struct, or NULL if the widget has no tooltip.
Soon as I play with this, I'll report what it does.
@tooltips: