# Tooltip (Python)

Marta Maria Casetti
mmcasetti@gmail.com 2012
Lägg till inforutor till dina komponenter
Sebastian Rasmussen
sebras@gmail.com 2019
Anders Jonsson
anders.jonsson@norsjovallen.se 2021

# Tooltip

Ett verktygsfält med en inforuta (med en bild) för en knapp.

Detta exempel bygger på Toolbar-exemplet.

# Kod som använts för att generera detta exempel

from gi.repository import Gtk from gi.repository import Gdk from gi.repository import Gio import sys

class MyWindow(Gtk.ApplicationWindow):

def __init__(self, app): Gtk.Window.__init__( self, title="Toolbar with Tooltips Example", application=app) self.set_default_size(400, 200)

grid = Gtk.Grid()

toolbar = self.create_toolbar() toolbar.set_hexpand(True) toolbar.show()

grid.attach(toolbar, 0, 0, 1, 1)

self.add(grid)

undo_action = Gio.SimpleAction.new("undo", None) undo_action.connect("activate", self.undo_callback) self.add_action(undo_action)

fullscreen_action = Gio.SimpleAction.new("fullscreen", None) fullscreen_action.connect("activate", self.fullscreen_callback) self.add_action(fullscreen_action)

def create_toolbar(self): toolbar = Gtk.Toolbar() toolbar.get_style_context().add_class(Gtk.STYLE_CLASS_PRIMARY_TOOLBAR)

# button for the "new" action new_button = Gtk.ToolButton.new_from_stock(Gtk.STOCK_NEW) # with a tooltip with a given text new_button.set_tooltip_text("Create a new file") new_button.set_is_important(True) toolbar.insert(new_button, 0) new_button.show() new_button.set_action_name("app.new")

# button for the "open" action open_button = Gtk.ToolButton.new_from_stock(Gtk.STOCK_OPEN) # with a tooltip with a given text in the Pango markup language open_button.set_tooltip_markup("Open an <i>existing</i> file") open_button.set_is_important(True) toolbar.insert(open_button, 1) open_button.show() open_button.set_action_name("app.open")

# button for the "undo" action undo_button = Gtk.ToolButton.new_from_stock(Gtk.STOCK_UNDO) # with a tooltip with an image # set True the property "has-tooltip" undo_button.set_property("has-tooltip", True) # connect to the callback function that for the tooltip # with the signal "query-tooltip" undo_button.connect("query-tooltip", self.undo_tooltip_callback) undo_button.set_is_important(True) toolbar.insert(undo_button, 2) undo_button.show() undo_button.set_action_name("win.undo")

# button for the "fullscreen/leave fullscreen" action self.fullscreen_button = Gtk.ToolButton.new_from_stock( Gtk.STOCK_FULLSCREEN) self.fullscreen_button.set_is_important(True) toolbar.insert(self.fullscreen_button, 3) self.fullscreen_button.set_action_name("win.fullscreen")

return toolbar

# the callback function for the tooltip of the "undo" button def undo_tooltip_callback(self, widget, x, y, keyboard_mode, tooltip): # set the text for the tooltip tooltip.set_text("Undo your last action") # set an icon for the tooltip tooltip.set_icon_from_stock("gtk-undo", Gtk.IconSize.MENU) # show the tooltip return True

def undo_callback(self, action, parameter): print("You clicked \"Undo\".")

def fullscreen_callback(self, action, parameter): is_fullscreen = self.get_window().get_state( ) & Gdk.WindowState.FULLSCREEN != 0 if not is_fullscreen: self.fullscreen_button.set_stock_id(Gtk.STOCK_LEAVE_FULLSCREEN) self.fullscreen() else: self.fullscreen_button.set_stock_id(Gtk.STOCK_FULLSCREEN) self.unfullscreen()

class MyApplication(Gtk.Application):

def __init__(self): Gtk.Application.__init__(self)

def do_activate(self): win = MyWindow(self) win.show_all()

def do_startup(self): Gtk.Application.do_startup(self)

new_action = Gio.SimpleAction.new("new", None) new_action.connect("activate", self.new_callback) app.add_action(new_action)

open_action = Gio.SimpleAction.new("open", None) open_action.connect("activate", self.open_callback) app.add_action(open_action)

def new_callback(self, action, parameter): print("You clicked \"New\".")

def open_callback(self, action, parameter): print("You clicked \"Open\".")

app = MyApplication() exit_status = app.run(sys.argv) sys.exit(exit_status)

# Användbara metoder för en Tooltip-komponent

`set_tooltip_text(text)` och `set_tooltip_markup(text)` kan användas för att lägga till en inforuta med vanlig text (eller text i märkspråket Pango) till en komponent.

För mer komplexa inforutor, exempelvis för en inforuta med en bild:

Ställ in egenskapen `"has-tooltip"` för komponenten till `True`; detta kommer få GTK+ att övervaka komponenten efter rörelse och relaterade händelser som behövs för att avgöra när och var en inforuta ska visas.

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 `set_icon()`. There are functions for setting the tooltip's markup (`set_markup(text)`), setting an image from a stock icon (`set_icon_from_stock(stock_id, size)`), or even putting in a custom widget (`set_custom(widget)`).

Returnera `True` från din query-tooltip-hanterare. Detta får inforutan att visas. Om du returnerar `False` kommer den inte att visas.

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:

Ställ in `"has-tooltip"` och anslut till `"query-tooltip"` som tidigare.

Använd `set_tooltip_window()` på komponenten för att ställa in ett GtkWindow skapat av dig som inforutefönster.

In the `"query-tooltip"` callback you can access your window using `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.

# API-referenser

I detta exempel använde vi följande:

GtkTooltip

GtkToolbar

GtkWidget

Standardobjekt