kde-extraapps/kget/transfer-plugins/contentfetch/README
2014-11-19 17:18:01 +00:00

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/* This file is part of the KDE project
Copyright (C) 2008 Ningyu Shi <shiningyu@gmail.com>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
*/
This file describes how to write a script using the kross interface from
the content fetch plugin.
== API ==
=== Functions ===
Script developer must implement certain functions in the
script to be called by the content fetch plugin.
* startDownload(config) (MUST implement)
config: SciptConfigAdaptor type
Descrption:
KGet will call this function when it gets the url from the user
input and are ready to start the download process. This is the main
entry point of the script.
* configureScript(widget, config) (Optional)
Parameter:
widget: SettingWidgetAddptor (QWidget) type
config: SciptConfigAdaptor type
Description:
If your script need config options, and you have implement a ui to
show them (eg. via pyqt/pykde) , you will need this one. General way
to do this is to implement your own QWidget subclass and call
widget.setWidget(your_widget) to show it. You might use the config to
deal with ini style file conveniently.
* configurationAccepted(widget, config) (Optional)
Parameter:
widget: SettingWidgetAddptor (QWidget) type
config: SciptConfigAdaptor type
Description:
This function is called when user click 'ok' from the setting ui.
Generally you should save your options, possibly with the help of
the 'config' object.
=== Class ===
Some objects are not directly exposed to script, they are passed
in through the function arguments. Here describe their types.
* ScriptConfigAdaptor
** void setWidget(widget)
Parameter:
widget: QWidget type
Description:
The 'widget' should be your own script setting ui widget, once
you are ready with your widget, call this function to show it.
* SettingWidgetAdaptor
Description:
This class is a helper class to provide a parser for the convenience
to load/save the configuration file.
Functions:
** void setFile(config_file, path = "")
Parameter:
config_file: QString/string, config file name
path: QString/string, optional. The path of the config file, if
omitted, default value is the $KDEUSERDIR/share/app/kget/contentfetch_scripts_setting/
Description:
Initial the file, must be called before any read/write.
** void unsetFile()
Description:
Free the file resource, ready to call setFile() again.
** QVariant read(group, key, default_value)
Parameters:
group: string, section name
key: string, key name
default_value: int/double/string/list/stringlist
Description:
Read specific value from config, if not found, return default_value.
** void write()
Parameters:
group: string, section name
key: string, key name
value: int/double/string/list/stringlist
Description:
Change specific value in the config.
** void save()
Description:
Save the config data into file.
** void reset()
Abandon changes in the config data, reread from file.
=== Object ===
Objects are pointers exported to script using the kross lib,to use these
objects, you must import them first.
E.g. In python, you do 'import kgetcore'
* kgetcore
** void addTransfer(sourceUrl, filename)
Parameter:
sourceUrl: QString/string
filename: QString/string, optional
Description:
Add the sourceUrl into the kget transferlist with the download file
set to 'filename'. If filename is ommitted, then kget will determine
the filename.
** string getSourceUrl()
Description:
Return the sourceurl from user input.
** void finish()
Description:
Notify kget the processing of the script finishes, should be called
at the end of the script.
** void abort(error_message = "")
Parameter:
error_message: QString/string, optional
Description:
Notify kget the script has failed with the error message.
== NOTICE ==
* Don't use threading/thread function within python, it will freeze kget
(due to some GIL related issue?). Just write old-styled serialized
program. Same thing for other languages. This might be solved with the
improvement of kross.