My first Maemo desktop widget

Marc Ordinas i Llopis marcoil My first desktop widget

Desktop Widgets
Normal windows with special type:
_NET_WM_WINDOW_TYPE: _HILDON_WM_WINDOW_TYPE_HOME_APPLET
Composited by the desktop on home

libhildondesktop
Lifetime management and positioning
Utility class HDHomePluginItem
Visibility and settings
Code at http://maemo.gitorious.org/fremantle-hildon-desktop/libhildondesktop

Lifetime management
Desktop file describes the widget
Library loaded by hildon-home
Position kept in GConf
Please see the example at
https://garage.maemo.org/svn/maemoexamples/trunk/example_desktop_widget/

HDHomePluginItem
Base class for desktop widgets
Derived from GtkWindow
Use as a container.
Or, draw directly using cairo.

Energy saving
is-on-current-desktop property
Listen to notification changes
notify::is-on-current-desktop
If not visible
Don't draw
Use as few resources as possible

Settings
Set property
HDHomePluginItem::settings
Listen to signal
HDHomePluginItem::show-settings

Transparency
In the realize method
Set colormap to RGBA.
Set app paintable to true.
In the expose_event method
Draw directly (using cairo, for example).

Questions? Examples at https://garage.maemo.org/projects/maemoexamples/

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My first Maemo desktop widget

by marcoil on Dec 05, 2009

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My first Maemo desktop widget — Presentation Transcript