plasma-framework/widgets/meter.h

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/*
* Copyright (C) 2007 Petri Damsten <damu@iki.fi>
*
* 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_METER_H
#define PLASMA_METER_H
#include <plasma/plasma_export.h>
#include <plasma/dataengine.h>
#include <QtGui/QGraphicsWidget>
namespace Plasma
{
class MeterPrivate;
/**
* @class Meter plasma/widgets/meter.h <Plasma/Widgets/Meter>
*
* @short Provides generic meter widget for Plasma
*
* Analog and bar meters are supported.
*
* Svgs can have following ids:
* - background: Drawn first to the bottom
* background can be a FrameSvg
* - label0, label1, ...: Rectangles mark the label places
* - bar: Bar for the bar meter
* can be replaced with bar-active and bar-inactive FrameSvg
* - pointer: Pointer for analog meter
* - rotatecenter: Marks the place of pointer rotation center
* - rotateminmax: Width and height of this object are the Min and Max rotate
* angles for the pointer
* - foreground: Is drawn to top
*
* @author Petri Damstén
*/
class PLASMA_EXPORT Meter : public QGraphicsWidget
{
Q_OBJECT
Q_ENUMS(MeterType)
Q_PROPERTY(int minimum READ minimum WRITE setMinimum)
Q_PROPERTY(int maximum READ maximum WRITE setMaximum)
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Q_PROPERTY(int value READ value WRITE setValue NOTIFY valueChanged)
Q_PROPERTY(QString svg READ svg WRITE setSvg)
Q_PROPERTY(MeterType meterType READ meterType WRITE setMeterType)
public:
/**
* Meter types enum
*/
enum MeterType {
/** Horizontal bar meter (like thermometer). */
BarMeterHorizontal,
/** Vertical bar meter (like thermometer). */
BarMeterVertical,
/** Analog meter (like tachometer). */
AnalogMeter
};
/**
* Constructor
* @param parent the QGraphicsItem this meter is parented to.
* @param parent the QObject this meter is parented to.
*/
explicit Meter(QGraphicsItem *parent = 0);
/**
* Destructor
*/
~Meter();
/**
* @return maximum value for the meter
*/
int maximum() const;
/**
* @return minimum value for the meter
*/
int minimum() const;
/**
* @return value for the meter
*/
int value() const;
/**
* Set svg file name
*/
void setSvg(const QString &svg);
/**
* @return svg file name
*/
QString svg() const;
/**
* Set meter type. Note: setSvg gets called automatically with the proper
* default values if svg is not set.
*/
void setMeterType(MeterType type);
/**
* @return meter type
*/
MeterType meterType() const;
/**
* Set text label for the meter
* @param index label index.
* @param text text for the label.
*/
void setLabel(int index, const QString &text);
/**
* @param index label index
* @return text label for the meter
*/
QString label(int index) const;
/**
* Set text label color for the meter
* @param index label index
* @param color the color to apply to the label
*/
void setLabelColor(int index, const QColor &color);
/**
* @param index label index
* @return text label color for the meter
*/
QColor labelColor(int index) const;
/**
* Set text label font for the meter
* @param index label index
* @param font the font to apply to the label
*/
void setLabelFont(int index, const QFont &font);
/**
* @param index label index
* @return text label font for the meter
*/
QFont labelFont(int index) const;
/**
* Set text label alignment for the meter
* @param index label index
* @param alignment the text alignment to apply to the label
*/
void setLabelAlignment(int index, const Qt::Alignment alignment);
/**
* @param index label index
* @return text label alignment for the meter
*/
Qt::Alignment labelAlignment(int index) const;
/**
* @param index label index
* @return the size of this label.
*/
QRectF labelRect(int index) const;
public Q_SLOTS:
/**
* Used when connecting to a DataEngine
*/
void dataUpdated(const QString &sourceName, const Plasma::DataEngine::Data &data);
/**
* Set maximum value for the meter
*/
void setMaximum(int maximum);
/**
* Set minimum value for the meter
*/
void setMinimum(int minimum);
/**
* Set value for the meter
*/
void setValue(int value);
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Q_SIGNALS:
/**
* This signal is sent when the value of the meter changes programmatically.
* The meter's value is passed.
*/
void valueChanged(const int &value);
protected:
/**
* Reimplemented from Plasma::Widget
*/
virtual void paint(QPainter *p,
const QStyleOptionGraphicsItem *option,
QWidget *widget = 0);
QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const;
private:
MeterPrivate *const d;
};
} // End of namepace
#endif