I posted this message to the plasma5 forum
(https://forum.kde.org/viewtopic.php?f=289&t=127322) and an administrator
replied to write here too.
I'm playing with plasma widget development, I am currently trying to write a
widget to launch a .desktop file. I have some problems finding the
documentation but finally I found a way to launch a program looking in the
official SystemLoadViewer sources.
[kdeplasma-addons.git] / applets / systemloadviewer / package / contents / ui
/ SystemLoadViewer.qml
Initialization at line 79 and launch at line 238.
Watching the program run I undestand that
kRun.openUrl()
accepts a string representing a file to be opened with the default associated
application or a .desktop file to launch.
I tested with various files:
- Copy-paste from the example to launch "sysguard" with the url obtained from
the "apps" DataSource: WORKS
- Using the url "/usr/share/applications/org.kde.ksysguard.desktop" (it is the
same string returned by the "apps" DataSource): WORKS
- If I try with another .desktop file inside my home folder: SEGFAULT
- If I copy the file "org.kde.ksysguard.desktop" in another directory and try
with the new path: SEGFAULT
- If I try to execute a bash script: WORKS
- Using the url of a PDF file will open the file with Okular: WORKS
- Using the url of a binary application "/usr/bin/ksysguard" don't work and
the openUrl() function returns an error value. No segfault so I think
this
is the expected behaviour.
I tested the widget directly in my plasma desktop and also using
"plasmawindowed". The segfault happen in both cases but with the former I can
see the console log.
Even if I am feeding the wrong data to the function I don't think the segfault
is the expected behaviour. Maybe someone more expert can take a loot at this
problem.
I'm using:
- updated kubuntu 15.04.
- Qt: 5.4.1
- KDE Frameworks: 5.9.0
- Plasma version 5.3.1.
I'm available to give more info if needed.
Here ends the "maybe important" stuff, the following is a newbie question.
I don't know if this is the correct place for this but I'm still searching a
solution for the original problem.
If I can't launch an executable this way maybe this isn't the correct
function. I am unable to find a documentation or source code for the QML
implementation of "Kio.KRun". Inspecting the properties with javascript shows
only three properties:
- objectName =
- objectNameChanged = function() { [code] }
- openUrl = function() { [code] }
So "openUrl()" appears to be the only function available, maybe KRun it's the
wrong tool.
I found the interesting Plasma2 / Service but I don't know how to find the
available DataSource ID's and the" operationDescription". I'm currently stuck
and need some direction.
Thanks for the help.
--
Nicola Felice
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