Launcher - Add 'installing' animation for when app is installed via drag & drop

[John Lea]

Add 'installing' animation for when app is installed via drag & drop.

Description:

The desired behavior when a user drags and drops a uninstalled app from the Dash App Lens to the Launcher is:

1) A 'uninstalled' version of the app icon is added to the Launcher.

2) As the app downloads and installs, progress is displayed inside the launcher icon.

3) When the app has finished installing, a Notify OSD notification tells the user that the app is installed. The icon will also 'pulse' once.

The following art assets are linked from this bug:

1. installing_animation.mov - https://chinstrap.canonical.com/~johnlea/1104launcher/installing_animation.mov

    This animation shows:
    - The uninstalled state
    - The installing progress animation
    - The installation complete 'pulse' animation

=============================================

This bug would be an ideal bug for someone to get started hacking on Unity, here's some information:

 * Time to fix: 15h
 * Difficulty: difficult
 * Implementation:

To implement this feature there is an existing call in Launcher.cpp called "handle_dbus_method_call". Information is received about newly installed applications from there. The information contains icon size, starting position (of the animation), the name of the icon to load, and the aptdaemon task. This information should be nicely encapsulated into a new LauncherIcon subclassed from BamfLauncherIcon and loaded into the launcher model.

New classes InstallLauncherIcon (subclasses BamfLauncherIcon)

InstallLauncherIcon is a bamf launcher icon which is capable of tracking the install progress of an aptdaemon task and reflecting this state out through it's progress property. (initial animation will not match the design movie).

Initial implementations should not worry about animations between the starting icon position and the placement on the launcher.

 * Where to look: src/Launcher
                  src/BamfLauncherIcon
 * Workflow information: http://unity.ubuntu.com/getinvolved/

[David Barth (dbarth)]

Need to first see how Software Center can let us call it to trigger an install and get a progress indicator in return.

[Mark Shuttleworth (sabdfl)]

This piece is very low priority. USC is where apps are selected for installation, and where progress is indicated. When .desktop files are created, USC needs to highlight those in a pane from which they can be dragged to the launcher. And recently-installed apps should also have their own section in the Apps Place, visible on the home screen of the Apps Place, from whence they can be launched and dragged to the launcher.

[Jakub 'Livio' Rusinek (liviopl-pl)]

Wouldn't plain ol' progress bar badge be more meaningful?

[Omer Akram (om26er)]

That won't fix in unity-2d only critical issues are now considered for it.

[Will Cooke (willcooke)]

As part of the big bug clear up for 16.04 we have reviewed this bug and we will not be working on it in the near future. Sorry we can't offer you a fix. We will of course review patches if anyone submits them. Please stop by IRC to discuss this option.

[Will Cooke (willcooke)]

This is on John Lea's wishlist. So adding to the For Consideration pile.