plasma-framework/scripting/appletscript.h

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/*
* Copyright 2007 by 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 PLASMA_APPLETSCRIPT_H
#define PLASMA_APPLETSCRIPT_H
#include <QtCore/QObject>
#include <QtCore/QRect>
#include <QtCore/QSizeF>
#include <kgenericfactory.h>
#include <plasma/plasma_export.h>
#include <plasma/scripting/scriptengine.h>
class QAction;
class QPainter;
class QStyleOptionGraphicsItem;
namespace Plasma
{
class AppletScriptPrivate;
/**
* @class AppletScript plasma/scripting/appletscript.h <Plasma/Scripting/AppletScript>
*
* @short Provides a restricted interface for scripted applets.
*/
class PLASMA_EXPORT AppletScript : public ScriptEngine
{
Q_OBJECT
public:
/**
* Default constructor for an AppletScript.
*
* Subclasses should not attempt to access the Plasma::Applet
* associated with this AppletScript in the constructor. All
* such set up that requires the Applet itself should be done
* in the init() method.
*/
explicit AppletScript(QObject *parent = 0);
~AppletScript();
/**
* Sets the applet associated with this AppletScript
*/
void setApplet(Plasma::Applet *applet);
/**
* Returns the Plasma::Applet associated with this script component
*/
Plasma::Applet *applet() const;
/**
* Called when the script should paint the applet
*
* @param painter the QPainter to use
* @param option the style option containing such flags as selection, level of detail, etc
*/
virtual void paintInterface(QPainter *painter,
const QStyleOptionGraphicsItem *option,
const QRect &contentsRect);
/**
* Returns the area within which contents can be painted.
**/
Q_INVOKABLE QSizeF size() const;
/**
* Called when any of the geometry constraints have been updated.
*
* This is always called prior to painting and should be used as an
* opportunity to layout the widget, calculate sizings, etc.
*
* Do not call update() from this method; an update() will be triggered
* at the appropriate time for the applet.
*
* @param constraints the type of constraints that were updated
*/
virtual void constraintsEvent(Plasma::Constraints constraints);
/**
* Returns a list of context-related QAction instances.
*
* @return A list of actions. The default implementation returns an
* empty list.
*/
virtual QList<QAction*> contextualActions();
/**
* Returns the shape of the widget, defaults to the bounding rect
*/
virtual QPainterPath shape() const;
/**
* Sets whether or not this script has a configuration interface or not
*
* @arg hasInterface true if the applet is user configurable
*/
void setHasConfigurationInterface(bool hasInterface);
public Q_SLOTS:
/**
* Show a configuration dialog.
*/
virtual void showConfigurationInterface();
/**
* Configure was changed.
*/
virtual void configChanged();
protected:
/**
* @arg engine name of the engine
* @return a data engine associated with this plasmoid
*/
Q_INVOKABLE DataEngine *dataEngine(const QString &engine) const;
/**
* @return absolute path to the main script file for this plasmoid
*/
QString mainScript() const;
/**
* @return the Package associated with this plasmoid which can
* be used to request resources, such as images and
* interface files.
*/
const Package *package() const;
private:
AppletScriptPrivate *const d;
};
#define K_EXPORT_PLASMA_APPLETSCRIPTENGINE(libname, classname) \
K_PLUGIN_FACTORY(factory, registerPlugin<classname>();) \
K_EXPORT_PLUGIN(factory("plasma_appletscriptengine_" #libname))
} //Plasma namespace
#endif