plasma-framework/widgets/iconwidget.h

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/*
* Copyright (C) 2007 by Siraj Razick <siraj@kde.org>
* Copyright (C) 2007 by Riccardo Iaconelli <riccardo@kde.org>
* Copyright (C) 2007 by Matt Broadstone <mbroadst@gmail.com>
* Copyright 2008 by Alexis Ménard <darktears31@gmail.com>
*
* 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_ICONWIDGET_H
#define PLASMA_ICONWIDGET_H
#include <QtCore/QObject>
#include <QtGui/QGraphicsTextItem>
#include <QtGui/QIcon>
#include <QtGui/QGraphicsWidget>
#include <plasma/dataengine.h>
#include <plasma/animator.h>
#include <plasma/plasma_export.h>
class QAction;
/**
* @class IconWidget plasma/widgets/iconwidget.h <Plasma/Widgets/IconWidget>
*
* @short Provides a generic icon.
*
* An icon, in this sense, is not restricted to just an image, but can also
* contain text. Currently, the IconWidget class is primarily used for desktop items,
* but is designed to be used anywhere an icon is needed in an applet.
*
* @author Siraj Razick <siraj@kde.org>
* @author Matt Broadstone <mbroadst@gmail.com>
*/
namespace Plasma
{
class IconWidgetPrivate;
class PLASMA_EXPORT IconWidget : public QGraphicsWidget
{
Q_OBJECT
Q_PROPERTY(QString text READ text WRITE setText)
Q_PROPERTY(QString infoText READ infoText WRITE setInfoText)
Q_PROPERTY(QIcon icon READ icon WRITE setIcon)
Q_PROPERTY(QColor textBackgroundColor READ textBackgroundColor WRITE setTextBackgroundColor)
Q_PROPERTY(QSizeF iconSize READ iconSize)
Q_PROPERTY(QString svg READ svg WRITE setSvg)
Q_PROPERTY(QAction *action READ action WRITE setAction)
Q_PROPERTY(Qt::Orientation orientation READ orientation WRITE setOrientation)
Q_PROPERTY(int numDisplayLines READ numDisplayLines WRITE setNumDisplayLines)
public:
/**
* Creates a new Plasma::IconWidget.
* @param parent the QGraphicsItem this icon is parented to.
*/
explicit IconWidget(QGraphicsItem *parent = 0);
/**
* Convenience constructor to create a Plasma::IconWidget with text.
* @param text the text that will be displayed with this icon.
* @param parent the QGraphicsItem this icon is parented to.
*/
explicit IconWidget(const QString &text, QGraphicsItem *parent = 0);
/**
* Creates a new Plasma::IconWidget with text and an icon.
* @param icon the icon that will be displayed with this icon.
* @param text the text that will be displayed with this icon.
* @param parent The QGraphicsItem this icon is parented to.
*/
IconWidget(const QIcon &icon, const QString &text, QGraphicsItem *parent = 0);
/**
* Destroys this Plasma::IconWidget.
*/
virtual ~IconWidget();
/**
* Returns the text associated with this icon.
*/
QString text() const;
/**
* Sets the text associated with this icon.
* @param text the text to associate with this icon.
*/
void setText(const QString &text);
/**
* Convenience method to set the svg image to use when given the filepath and name of svg.
* @param svgFilePath the svg filepath including name of the svg.
* @param svgIconElement the svg element to use when displaying the svg. Defaults to all of them.
*/
void setSvg(const QString &svgFilePath, const QString &svgIconElement = QString());
/**
* @return the path to the svg file set, if any
*/
QString svg() const;
/**
* Returns the meta text associated with this icon.
*/
QString infoText() const;
/**
* Sets the additional information to be displayed by
* this icon.
* @param text additional meta text associated with this icon.
*/
void setInfoText(const QString &text);
/**
* @return the icon associated with this icon.
*/
QIcon icon() const;
/**
* Sets the graphical icon for this Plasma::IconWidget.
* @param icon the KIcon to associate with this icon.
*/
void setIcon(const QIcon &icon);
/**
* @return the color to use behind the text of the icon
* @since 4.3
*/
QColor textBackgroundColor() const;
/**
* Sets the color to use behind the text of the icon
* @param color the color, or QColor() to reset it to no background color
* @since 4.3
*/
void setTextBackgroundColor(const QColor &color);
/**
* Convenience method to set the icon of this Plasma::IconWidget
* using a QString path to the icon.
* @param icon the path to the icon to associate with this Plasma::IconWidget.
*/
Q_INVOKABLE void setIcon(const QString &icon);
/**
* @return the size of this Plasma::IconWidget's graphical icon.
*/
QSizeF iconSize() const;
/**
* Plasma::IconWidget allows the user to specify a number of actions
* (currently four) to be displayed around the widget. This method
* allows for a created QAction to be added to the Plasma::IconWidget.
* @param action the QAction to associate with this icon.
*/
void addIconAction(QAction *action);
/**
* Removes a previously set iconAction. The action will be removed from the widget
* but will not be deleted.
*
* @param the QAction to be removed, if 0 all actions will be removed
*/
void removeIconAction(QAction *action);
/**
* Associate an action with this IconWidget
* this makes the IconWidget follow the state of the action, using its icon, text, etc.
* when the IconWidget is clicked, it will also trigger the action.
* Unlike addIconAction, there can be only one associated action.
*/
void setAction(QAction *action);
/**
* @return the currently associated action, if any.
*/
QAction *action() const;
/**
* let set the orientation of the icon
* Qt::Vertical: text under the icon
* Qt::Horizontal text at a side of the icon depending
* by the direction of the language
* @param orientation the orientation we want
*/
void setOrientation(Qt::Orientation orientation);
/**
* @return the orientation of the icon
*/
Qt::Orientation orientation() const;
/**
* inverts the layout of the icons if the orientation is horizontal,
* normally we get icon on the left with left-to-right languages
* @param invert if we want to invert the layout of icons
*/
void invertLayout(bool invert);
/**
* @return if the layout of the icons should appear inverted or not
*/
bool invertedLayout() const;
/**
* @return optimal size given a size for the icon
* @param iconWidth desired width of the icon
*/
QSizeF sizeFromIconSize(const qreal iconWidth) const;
/**
* @return the number of lines allowed to display
*/
int numDisplayLines();
/**
* @param numLines the number of lines to show in the display.
*/
void setNumDisplayLines(int numLines);
/**
* Sets whether or not to draw a background area for the icon
*
* @arg draw true if a background should be drawn or not
*/
void setDrawBackground(bool draw);
/**
* @return true if a background area is to be drawn for the icon
*/
bool drawBackground() const;
/**
* reimplemented from QGraphicsItem
*/
QPainterPath shape() const;
public Q_SLOTS:
/**
* Sets the appearance of the icon to pressed or restores the appearance
* to normal. This does not simulate a mouse button press.
* @param pressed whether to appear as pressed (true) or as normal (false)
*/
void setPressed(bool pressed = true);
/**
* Shortcut for setPressed(false)
*/
void setUnpressed();
protected:
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
QSizeF sizeHint(Qt::SizeHint which, const QSizeF & constraint = QSizeF()) const;
Q_SIGNALS:
/**
* Indicates when the icon has been pressed.
*/
void pressed(bool down);
/**
* Indicates when the icon has been clicked.
*/
void clicked();
/**
* Indicates when the icon has been double-clicked
*/
void doubleClicked();
/**
* Indicates when the icon has been activated following the single
* or doubleclick settings
*/
void activated();
/**
* Indicates that something about the icon may have changed (image, text, etc)
* only actually works for icons associated with an action
*/
void changed();
protected:
bool isDown();
void mousePressEvent(QGraphicsSceneMouseEvent *event);
void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
bool sceneEventFilter(QGraphicsItem *watched, QEvent *event);
void changeEvent(QEvent *event);
public:
/**
* @internal
**/
void drawActionButtonBase(QPainter *painter, const QSize &size, int element);
private:
Q_PRIVATE_SLOT(d, void syncToAction())
Q_PRIVATE_SLOT(d, void clearAction())
Q_PRIVATE_SLOT(d, void svgChanged())
Q_PRIVATE_SLOT(d, void actionDestroyed(QObject *obj))
Q_PRIVATE_SLOT(d, void hoverAnimationUpdate(qreal progress))
Q_PRIVATE_SLOT(d, void colorConfigChanged())
Q_PRIVATE_SLOT(d, void iconConfigChanged())
IconWidgetPrivate * const d;
friend class IconWidgetPrivate;
};
} // namespace Plasma
#endif