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POWhy does the hover animation ignore the transition time and function in Gtk3?
 

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  1. POWhy does the hover animation ignore the transition time and function in Gtk3?
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    <p>With the new gtk, it is possible to create graphical themes with a file in something like css. </p> <p>Given this css file (named <code>my-gtk-widgets.css</code>):</p> <pre><code>.button { border-radius: 0; border-style: solid; } .button:hover { transition: 3000ms linear; border-radius: 50; } </code></pre> <p>And the following python code:</p> <pre><code>from gi.repository import Gtk from gi.repository import Gdk def _destroy_cb(widget, data=None): Gtk.main_quit() window = Gtk.Window() window.connect("destroy", _destroy_cb) screen = Gdk.Screen.get_default() css_provider = Gtk.CssProvider() css_provider.load_from_path('my-gtk-widgets.css') context = Gtk.StyleContext() context.add_provider_for_screen(screen, css_provider, Gtk.STYLE_PROVIDER_PRIORITY_USER) box = Gtk.VBox() window.add(box) button = Gtk.Button('go-next') box.pack_start(button, False, False, 0) window.show_all() Gtk.main() </code></pre> <p>Running this code gives a button which changes the border-radius when hovered. But the transition is instant, not animated. </p> <p><img src="https://i.stack.imgur.com/BCxIN.png" alt="enter image description here"></p> <p><img src="https://i.stack.imgur.com/gh2z8.png" alt="enter image description here"></p> <p>What is the reason for this? Do I need a different version of gtk, python, ... ? Or does this animation depend on the gtk theme (in my case the Ubuntu default <code>Ambience</code>)? Or is there something wrong in my css file?</p> <p>python version: 2.7.2+</p> <p>gtk version: 3.0</p> <p>EDIT: the example is a modified version of <a href="http://gnomejournal.org/article/107/styling-gtk-with-css" rel="nofollow noreferrer">this</a></p>
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