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List:       kde-devel
Subject:    Re: ? about Plasma::Container.setWallpaper();
From:       "Aaron J. Seigo" <aseigo () kde ! org>
Date:       2009-03-26 1:56:01
Message-ID: 200903251956.02593.aseigo () kde ! org
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On Wednesday 25 March 2009, David Boosalis wrote:
> The first argument is pluginName, being that the method is setWallpaper, I
> thought it was something like "Air", but in looking at the .cpp for the
> containment class it looks like you first must read a config entry for
> wallpaper plugin and then pass it as this argument.

yes, wallpapers are provided as plugins. currently we have:

* image
* color

we also have some new ones lined up:

* mandelbrot
* virus

you can get a list using Wallpaper::listWAllaperInfo. 

the mode in setWallpaper is dependent on the plugin; for instance, the image 
plugin provides both SingleImage and Slideshow, as seen in the .desktop file 
for it:

Actions=SingleImage;Slideshow;

you can also get this programmaticaly via the wallpaper info.

as for setting the default wallpaper, there are a few  ways of doing it. one 
is to provide a stock configuration for Image; another is to set the default 
wallpaper for the Plasma::Theme, but putting this in the metadata.desktop for 
the theme:

[Wallpaper]
defaultWallpaperTheme=themeOrFilePath

there are also some other customizations you can make in there, including 
defaultWallpaperSuffix, defaultWallpaperWidth, defaultHeight though you 
shouldn't generally require those.

> If I want a container to have a customized wallpaper do I use the
> setWallpaper?

you certainly can. you can also provide your own wallpaper plugin, or you can 
skip wallpapers and provide a Containment plugin that just does the background 
painting itself.

if you want an image, the easiest is to use the image wallpaper with a 
customized theme. iirc, you're putting together a stock embedded type system 
so you could just as well provide a default plasma-desktop-appletsrc that has 
this information in it and then there's no need to write any code or do 
anything else.

e.g. if i were you i'd grab the blankdesktop Containment plugin that is in 
trunk/playground/base/plasma/containments/blankdesktop/ and put something like 
this in the plasma-desktop-appletsrc:

[$i]
[Containments][1]
plugin=blankdesktop
screen=0
wallpaperplugin=image
wallpaperpluginmode=SingleImage

[Containments][1][Wallpaper][image]
wallpaper=/usr/share/wallpapers/mywallpaper.jpg


that would give you a plasma desktop with nothing on the desktop layer but 
mywallpaper.jpg, no panel and everything locked down (the [$i] thing at the 
top)

-- 
Aaron J. Seigo
humru othro a kohnu se
GPG Fingerprint: 8B8B 2209 0C6F 7C47 B1EA  EE75 D6B7 2EB1 A7F1 DB43

KDE core developer sponsored by Qt Software


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