plasma-framework/abstractrunner.h

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/*
* Copyright 2006-2007 Aaron Seigo <aseigo@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef RUNNER_H
#define RUNNER_H
#include <QtCore/QObject>
#include <plasma/plasma_export.h>
#include <plasma/searchaction.h>
#include <plasma/searchcontext.h>
class KCompletion;
namespace Plasma
{
/**
* An abstract base class for Plasma Runner plugins
*/
class PLASMA_EXPORT AbstractRunner : public QObject
{
Q_OBJECT
public:
typedef QList<AbstractRunner*> List;
/**
* Static method is called to load and get a list available of Runners.
*/
static List loadRunners(QObject* parent);
/**
* Constrcuts an Runner object. Since AbstractRunner has pure virtuals,
* this constructor can not be called directly. Rather a subclass must
* be created
*/
explicit AbstractRunner(QObject* parent = 0);
virtual ~AbstractRunner();
/**
* If the runner can run precisely this term, return a QAction, else
* return 0. The first runner that returns a QAction will be the
* default runner. Other runner's actions will be suggested in the
* interface. Non-exact matches should be offered via findMatches.
* The action will be activated if the user selects it.
* If the action is informational only and should not be executed,
* disable the action with setEnabled( false ).
*
* If this runner's exact match is selected, the action will not
* be triggered, but it will be passed into the exec method.
* @see exec
*
* Ownership of the action passes to the AbstractRunner class.
*/
virtual void match(Plasma::SearchContext *search) = 0;
/**
* If the runner has options that the user can interact with to modify
* what happens when exec or one of the actions created in fillMatches
* is called, the runner should return true
*/
bool hasMatchOptions();
/**
* If hasMatchOptions() returns true, this method may be called to get
* a widget displaying the options the user can interact with to modify
* the behaviour of what happens when a given match is selected.
*
* @param widget the parent of the options widgets.
*/
virtual void createMatchOptions(QWidget *widget);
/**
* If the runner itself has configuration options, this method returns true
*/
bool canBeConfigured();
/**
* If canBeConfigured() returns true, this method may to get
* a widget displaying the options the user can interact with to modify
* the behaviour of what happens when a given match is selected.
*
* @param widget the parent of the options widgets.
*/
virtual void createConfigurationInterface(QWidget *widget);
/**
* Called whenever an exact or possible match associated with this
* runner is triggered.
*/
virtual void exec(Plasma::SearchAction *action);
protected:
/**
* Sets whether or not the the runner has options for matches
*/
void setHasMatchOptions(bool hasMatchOptions);
/**
* Sets whether or not the runner has configuration options itself
*/
void setCanBeConfigured(bool canBeConfigured);
private:
class Private;
Private* const d;
};
} // Plasma namespace
#define K_EXPORT_PLASMA_RUNNER( libname, classname ) \
K_PLUGIN_FACTORY(factory, registerPlugin<classname>();) \
K_EXPORT_PLUGIN(factory("plasma_runner_" #libname))
#endif