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- Ported PushButton to Plasma::Widget API
- Two new classes, Rectangle and Label.
- All Widgets should now inherit from Plasma::Widget


svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=691090
This commit is contained in:
Matias Valdenegro Toro 2007-07-22 22:16:40 +00:00
parent dd7b8b306b
commit bef5a33ed5
12 changed files with 588 additions and 159 deletions
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68
widgets/label.cpp Normal file
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@ -0,0 +1,68 @@
#include "label.h"
#include <QPainter>
#include <QFontMetricsF>
namespace Plasma {
class Label::Private
{
public:
Private() {}
QString text;
};
Label::Label(Widget *parent)
: Widget(parent),
d(new Private)
{
}
Label::~Label()
{
}
Qt::Orientations Label::expandingDirections() const
{
return Qt::Horizontal | Qt::Vertical;
}
bool Label::hasHeightForWidth() const
{
return true;
}
qreal Label::heightForWidth(qreal w) const
{
return 0;
}
QSizeF Label::sizeHint() const
{
QFontMetricsF m(QFont("Arial", 12));
return m.boundingRect(d->text).size();
}
void Label::setText(const QString& text)
{
d->text = text;
}
QString Label::text() const
{
return d->text;
}
void Label::paint(QPainter *p, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(option);
Q_UNUSED(widget);
/* TODO: Add config parameters, like text color, text alignment, and brush. */
p->setPen(QPen(Qt::black, 1));
p->drawText(localGeometry(), Qt::AlignCenter | Qt::TextWordWrap, d->text);
}
}

93
widgets/label.h Normal file
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@ -0,0 +1,93 @@
/*
* Copyright (C) 2007 by Matias Valdenegro T. <mvaldenegro@informatica.utem.cl>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License version 2 as
* published by the Free Software Foundation
*
* 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_LABEL__
#define __PLASMA_LABEL__
#include <plasma/widgets/widget.h>
class QGraphicsTextItem;
namespace Plasma
{
/**
* Simple Text Label.
*
* @author Matias Valdenegro T. <mvaldenegro@informatica.utem.cl>
*
* This class is a simple text label, it just draws plain text.
*/
class PLASMA_EXPORT Label : public Plasma::Widget
{
public:
/**
* Constructor.
*/
Label(Widget *parent);
/**
* Virtual Destructor.
*/
virtual ~Label();
/**
* Labels can expand in Horizontal and Vertical directions.
*/
Qt::Orientations expandingDirections() const;
/**
* Labels can use height-for-width geometry management.
*/
bool hasHeightForWidth() const;
/**
* Reimplemented from Plasma::Widget.
*/
qreal heightForWidth(qreal w) const;
/**
* Reimplemented from Plasma::Widget.
*/
QSizeF sizeHint() const;
/**
* Sets the text to be displayed.
*/
void setText(const QString& text);
/**
* Returns the displayed text.
*/
QString text() const;
/**
* Paint function.
*/
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
private:
class Private;
Private *d;
};
}
#endif /* __PLASMA_LABEL__ */

61
widgets/layout.h
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@ -30,31 +30,90 @@ namespace Plasma
/**
* Base class for Plasma Layout managers
*
* @author Matias Valdenegro T. <mvaldenegro@informatica.utem.cl>
*
* All layout managers must implement this class. Normal users should use the specific layouts,
* like Plasma::VBoxLayout, Plasma::HBoxLayout and Plasma::GridLayout.
*/
class PLASMA_EXPORT Layout : public LayoutItem
{
public:
/**
* Constructor.
*/
Layout(LayoutItem *parent);
/**
* Virtual Destructor.
*/
virtual ~Layout();
/**
* Returns the margin of this Layout.
*/
qreal margin() const;
/**
* Sets the margin of this Layout.
*/
void setMargin(qreal m);
/**
* Returns the spacing between Layout elements of this Layout.
*/
qreal spacing() const;
/**
* Sets the spacing of this Layout.
*/
void setSpacing(qreal s);
/**
* Returns the parent of this Layout.
*/
LayoutItem *parent() const;
/**
* Returns the number of elements of this Layout.
*/
virtual int count() const = 0;
/**
* Returns true if this Layout contains no elements, false otherwise.
*/
virtual bool isEmpty() const = 0;
virtual void addItem(LayoutItem *l) = 0;
/**
* Adds a Item to this Layout.
* @param l Pointer to the Item to be added.
*/
virtual void addItem(LayoutItem *l) = 0;
/**
* Removes a Item from this Layout.
* @param l Pointer to the Item to be removed.
*/
virtual void removeItem(LayoutItem *l) = 0;
/**
* Returns the index of a Item in this Layout.
* @param l Pointer to an Item to be queryed.
*/
virtual int indexOf(LayoutItem *l) const = 0;
/**
* Returns a Pointer to an Item in this Layout.
* @param i Index of the desired Item.
*/
virtual LayoutItem *itemAt(int i) const = 0;
/**
* Takes the Pointer of an Item in this Layout.
* @param i Index of the desired Item.
*/
virtual LayoutItem *takeAt(int i) = 0;
private:

53
widgets/layoutitem.h
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@ -31,27 +31,78 @@ class Layout;
/**
* Base class for Plasma layout-managed items
*
* @author Matias Valdenegro T. <mvaldenegro@informatica.utem.cl>
*
* All layout-managed items should implement this class, but regular users just need to use
* Plasma::Widget and Plasma::Layout.
*/
class PLASMA_EXPORT LayoutItem
{
public:
/**
* Constructor.
*/
LayoutItem();
/**
* Virtual Destructor.
*/
virtual ~LayoutItem();
/**
* Returns a bitmask with the directions that this Item can be expanded.
*/
virtual Qt::Orientations expandingDirections() const = 0;
/**
* Returns the minimum size of this Item and it's contents.
*/
virtual QSizeF minimumSize() const = 0;
/**
* Returns the maximum size of this Item.
*/
virtual QSizeF maximumSize() const = 0;
/**
* Returns true whatever this Item can use height-for-width layout management,
* false otherwise.
*/
virtual bool hasHeightForWidth() const;
/**
* Returns the corresponding height for a given width.
* @param w Width
*/
virtual qreal heightForWidth(qreal w) const;
/**
* Returns true whatever this Item can use width-for-height layout management,
* false otherwise.
*/
virtual bool hasWidthForHeight() const;
/**
* Returns the corresponding width for a given height.
* @param h Height
*/
virtual qreal widthForHeight(qreal h) const;
/**
* Returns the geometry of this Item.
*/
virtual QRectF geometry() const = 0;
/**
* Sets the geometry of this Item.
*/
virtual void setGeometry(const QRectF& geometry) = 0;
/**
* Returns the most appropiate size of this Item to hold whatever contents it has.
*/
virtual QSizeF sizeHint() const = 0;
/**
@ -73,7 +124,7 @@ class PLASMA_EXPORT LayoutItem
void setLayout(Layout* layout);
/**
* Returns the layout this item is currently associated with
* Returns the layout this item is currently associated with.
*/
Layout* layout();

114
widgets/pushbutton.cpp
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@ -24,7 +24,9 @@
#include <QWidget>
#include <QPainter>
#include <QGraphicsSceneMouseEvent>
#include <QDebug>
#include <QFontMetricsF>
#include <QApplication>
#include "pushbutton.moc"
namespace Plasma
@ -43,37 +45,28 @@ class PushButton::Private
QSize iconSize;
bool hasIcon;
int labelTextOpacity;
int height;
int width;
int maxWidth;
int minWidth;
int minHeight;
int maxHeight;
int radius;
QTimer * updateTimer;
QTimer *updateTimer;
PushButton::ButtonState state;
};
PushButton::PushButton(QGraphicsItem *parent)
PushButton::PushButton(Widget *parent)
: QObject(),
QGraphicsItem(parent),
QLayoutItem (Qt::AlignHCenter),
Widget(parent),
d(new Private)
{
setAcceptedMouseButtons(Qt::LeftButton);
setAcceptsHoverEvents(true);
setEnabled(true);
d->height = 40;
d->width = 100 ;
d->minWidth = d->width;
d->maxWidth = d->width;
d->minHeight = d->height;
d->maxHeight = d->height;
resize(40.0f, 100.0f);
setPos(QPointF(0.0,0.0));
/*FIXME: Don't use hardcoded strings and colors. */
d->state = PushButton::None;
d->labelText = QString("Plasma");
d->labelTextColor = QColor(201,201,255);
d->labelTextColor = QColor(201, 201, 255);
d->hasIcon = false;
d->iconSize = QSize(32,32);
}
@ -88,11 +81,6 @@ void PushButton::updated(const QString&, const DataEngine::Data &data)
Q_UNUSED(data)
}
QRectF PushButton::boundingRect() const
{
return QRectF(0, 0, d->width, d->height);
}
void PushButton::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
QStyleOptionButton options;
@ -110,7 +98,7 @@ void PushButton::paint(QPainter *painter, const QStyleOptionGraphicsItem *option
widget->style()->drawPrimitive(QStyle::PE_PanelButtonCommand, &options, painter, widget);
widget->style()->drawPrimitive(QStyle::PE_FrameFocusRect, &options, painter, widget);
widget-> style()->drawControl(QStyle::CE_PushButton, &options, painter, widget);
widget->style()->drawControl(QStyle::CE_PushButton, &options, painter, widget);
}
void PushButton::setText(const QString& text)
@ -127,39 +115,11 @@ void PushButton::setText(const QString& text)
}
QString PushButton::text() const
{
return d->labelText;
}
int PushButton::height() const
{
return d->height;
}
int PushButton::width() const
{
return d->width;
}
void PushButton::setHeight(int h)
{
prepareGeometryChange();
d->height = h;
update();
}
void PushButton::setWidth(int w)
{
if (!(w >= d->maxWidth))
{
prepareGeometryChange ();
d->width = w;
update();
}
}
void PushButton::setIcon(const QString& path)
{
if (!path.isNull())
@ -173,25 +133,6 @@ void PushButton::setIcon(const QString& path)
d->hasIcon = false;
}
QSize PushButton::size() const
{
return QSize(d->width, d->height);
}
void PushButton::setSize(const QSize& s)
{
prepareGeometryChange();
if (!d->maxWidth >= s.width())
d->width = s.width();
d->height = s.height();
update();
}
void PushButton::setMaximumWidth(int w)
{
d->maxWidth= w;
}
bool PushButton::isDown()
{
if (d->state == PushButton::Pressed)
@ -199,7 +140,7 @@ bool PushButton::isDown()
return false;
}
void PushButton::mousePressEvent ( QGraphicsSceneMouseEvent * event )
void PushButton::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
event->accept();
d->state = PushButton::Pressed;
@ -207,7 +148,7 @@ void PushButton::mousePressEvent ( QGraphicsSceneMouseEvent * event )
// emit clicked();
}
void PushButton::mouseReleaseEvent ( QGraphicsSceneMouseEvent * event )
void PushButton::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
event->accept();
if (d->state == PushButton::Pressed)
@ -216,37 +157,28 @@ void PushButton::mouseReleaseEvent ( QGraphicsSceneMouseEvent * event )
update();
}
QSize PushButton::sizeHint() const
QSizeF PushButton::sizeHint() const
{
return QSize(d->width,d->height);
return minimumSize();
}
QSize PushButton::minimumSize() const
QSizeF PushButton::minimumSize() const
{
return QSize(d->minWidth,d->minHeight);
QFontMetricsF m = qApp->fontMetrics();
return m.boundingRect(text()).size();
}
QSize PushButton::maximumSize() const
QSizeF PushButton::maximumSize() const
{
return QSize(d->maxWidth,d->maxHeight);
return QSizeF();
}
Qt::Orientations PushButton::expandingDirections() const
Qt::Orientations PushButton::expandingDirections() const
{
return Qt::Horizontal;
}
void PushButton::setGeometry(const QRect & r)
{
setSize(r.size());
setPos(r.x(),r.y());
}
QRect PushButton::geometry() const
{
return boundingRect().toRect();
}
bool PushButton::isEmpty() const
{
return false;

82
widgets/pushbutton.h
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@ -1,5 +1,6 @@
/*
* Copyright (C) 2007 by Siraj Razick siraj@kde.org
* and Matias Valdenegro <mvaldenegro@informatica.utem.cl>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License version 2 as
@ -24,20 +25,24 @@
#include <QtGui/QLayoutItem>
#include <plasma/dataengine.h>
#include <plasma/widgets/widget.h>
#include <plasma/plasma_export.h>
//TODO
//Please Document this class
namespace Plasma
{
/**
* Class that emulates a QPushButton inside plasma
* Class that emulates a QPushButton inside Plasma
*
* @author Siraj Razick and Matias Valdenegro.
*
*
*/
class PLASMA_EXPORT PushButton : public QObject, public QGraphicsItem, public QLayoutItem
class PLASMA_EXPORT PushButton : public QObject,
public Plasma::Widget
{
Q_OBJECT
public:
enum ButtonShape
{
@ -55,37 +60,68 @@ class PLASMA_EXPORT PushButton : public QObject, public QGraphicsItem, public QL
};
public:
PushButton(QGraphicsItem *parent = 0);
/**
* Constructor.
*/
PushButton(Widget *parent = 0);
/**
* Virtual Destructor.
*/
virtual ~PushButton();
/**
* Returns the text of this Button.
*/
QString text() const;
void setText(const QString &name);
QSize size() const;
void setSize(const QSize& size);
int height() const;
void setHeight(int height);
int width() const;
void setWidth(int width);
/**
* Sets the text of this Button.
*/
void setText(const QString &text);
/**
* Sets the icon of this Button.
* @param path Path to the icon file. TODO : WTF is path?
*/
void setIcon(const QString& path);
void setMaximumWidth(int maxwidth);
/**
* Paint function.
*/
virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
virtual QRectF boundingRect() const;
//layout stufff
virtual QSize sizeHint() const ;
virtual QSize minimumSize() const;
virtual QSize maximumSize() const ;
/**
* Reimplemented from Plasma::Widget.
*/
virtual QSizeF sizeHint() const ;
/**
* Reimplemented from Plasma::Widget.
*/
virtual QSizeF minimumSize() const;
/**
* Reimplemented from Plasma::Widget.
*/
virtual QSizeF maximumSize() const ;
/**
* Buttons prefer to expand in Horizontal direction.
*/
virtual Qt::Orientations expandingDirections() const;
virtual void setGeometry(const QRect& r);
virtual QRect geometry() const ;
/**
* TODO: What does this function do?
*/
virtual bool isEmpty() const;
Q_SIGNALS:
/**
* Triggers whatever this button is clicked.
*/
void clicked();
public Q_SLOTS:

34
widgets/rectangle.cpp Normal file
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@ -0,0 +1,34 @@
#include "rectangle.h"
#include <QPainter>
namespace Plasma {
Rectangle::Rectangle(Widget *parent)
: Widget(parent)
{
resize(400.0f, 400.0f);
setFlag(QGraphicsItem::ItemIsMovable);
}
Rectangle::~Rectangle()
{
}
Qt::Orientations Rectangle::expandingDirections() const
{
return Qt::Horizontal | Qt::Vertical;
}
void Rectangle::paint(QPainter *p, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(option);
Q_UNUSED(widget);
p->setBrush(Qt::white);
p->setPen(Qt::black);
p->setOpacity(0.5f);
p->drawRect(localGeometry());
}
}

20
widgets/rectangle.h Normal file
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@ -0,0 +1,20 @@
#include <plasma/widgets/widget.h>
namespace Plasma {
class PLASMA_EXPORT Rectangle : public Plasma::Widget
{
public:
Rectangle(Widget *parent);
virtual ~Rectangle();
Qt::Orientations expandingDirections() const;
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
private:
class Private;
Private const *d;
};
}

9
widgets/vboxlayout.cpp
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@ -84,11 +84,11 @@ QRectF VBoxLayout::geometry() const
void VBoxLayout::setGeometry(const QRectF& geometry)
{
if (!geometry.isValid() || geometry.isEmpty()) {
kDebug() << "Invalid Geometry!" << endl;
kDebug() << "Invalid Geometry " << geometry << endl;
return;
}
qDebug("Geometry %p : %f, %f by %f, %f", this, geometry.x(), geometry.y(), geometry.width(), geometry.height());
kDebug() << this << " Geometry process " << geometry << " for " << d->childList.count() << " childrens"<< endl;
QList<LayoutItem *> children;
QList<LayoutItem *> expandingChildren;
@ -118,13 +118,16 @@ void VBoxLayout::setGeometry(const QRectF& geometry)
sizes.insert(indexOf(l),QSizeF(available.width(), expandHeight));
}
QPointF start = geometry.topLeft();
//QPointF start = geometry.topLeft();
QPointF start = QPointF(0.0f, 0.0f);
start += QPointF(margin(), spacing());
for (int i = 0; i < sizes.size(); i++) {
LayoutItem *l = itemAt(i);
kDebug() << "Setting Geometry for child " << l << " to " << QRectF(start, sizes[i]) << endl;
l->setGeometry(QRectF(start, sizes[i]));
start += QPointF(0.0, sizes[i].height() + spacing());
}

12
widgets/vboxlayout.h
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@ -31,11 +31,23 @@ namespace Plasma
/**
* Vertical Box Layout
*
* @author Matias Valdenegro T. <mvaldenegro@informatica.utem.cl>
*
* This class implements a Vertical Box Layout, it just lays items in vertical, from up to down.
*/
class PLASMA_EXPORT VBoxLayout : public Layout
{
public:
/**
* Constructor.
*/
VBoxLayout(LayoutItem *parent = 0);
/**
* Virtual Destructor.
*/
virtual ~VBoxLayout();
Qt::Orientations expandingDirections() const;

44
widgets/widget.cpp
View File

@ -20,6 +20,8 @@
#include "widget.h"
#include <KDebug>
#include <QtCore/QList>
#include "layout.h"
@ -36,7 +38,7 @@ class Widget::Private
{ }
~Private() { }
QRectF geometry;
QSizeF size;
Widget *parent;
Layout *layout;
@ -47,11 +49,11 @@ Widget::Widget(QGraphicsItem *parent)
: QGraphicsItem(parent),
d(new Private)
{
d->parent = dynamic_cast<Widget*>(parent);
d->parent = dynamic_cast<Widget *>(parent);
if (d->parent) {
d->parent->addChild(this);
d->parent->setGeometry(QRectF(QPointF(0.0, 0.0), d->parent->size()));
d->parent->invalidate();
}
}
@ -101,14 +103,20 @@ qreal Widget::widthForHeight(qreal h) const
QRectF Widget::geometry() const
{
return d->geometry;
return QRectF(pos(), size());
}
QRectF Widget::localGeometry() const
{
return QRectF(QPointF(0.0f, 0.0f), size());
}
void Widget::setGeometry(const QRectF& geometry)
{
prepareGeometryChange();
d->geometry = geometry;
setPos(geometry.topLeft());
d->size = geometry.size();
updateGeometry();
update();
@ -117,12 +125,17 @@ void Widget::setGeometry(const QRectF& geometry)
void Widget::updateGeometry()
{
if (layout()) {
layout()->setGeometry(QRectF(QPointF(0.0, 0.0), size()));
kDebug() << (void *) this << " updating geometry to " << size() << endl;
layout()->setGeometry(geometry());
}
}
void Widget::invalidate()
{
setGeometry(geometry());
updateGeometry();
if (parent()) {
@ -137,17 +150,17 @@ QSizeF Widget::sizeHint() const
QSizeF Widget::size() const
{
return geometry().size();
return d->size;
}
QRectF Widget::boundingRect() const
{
return geometry();
return QRectF(QPointF(0.0f, 0.0f), size());
}
void Widget::resize(const QSizeF& size)
{
setGeometry(QRectF(d->geometry.topLeft(), size));
setGeometry(QRectF(pos(), size));
}
void Widget::resize(qreal w, qreal h)
@ -157,7 +170,11 @@ void Widget::resize(qreal w, qreal h)
void Widget::setLayout(Layout *l)
{
d->layout = l;
if(!d->layout) {
d->layout = l;
} else {
kDebug() << "Widget " << this << "already has a layout!" << endl;
}
}
Layout *Widget::layout() const
@ -189,9 +206,10 @@ void Widget::addChild(Widget *w)
void Widget::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(painter)
Q_UNUSED(option)
Q_UNUSED(widget)
Q_UNUSED(painter);
Q_UNUSED(option);
Q_UNUSED(widget);
// do nothing, but we need to reimp so we can create Widget items as this method
// is pure virtual in QGraphicsItem
}

157
widgets/widget.h
View File

@ -34,49 +34,152 @@ namespace Plasma
class Layout;
/**
* Class that emulates a QWidget inside plasma
* Base class for all Widgets in Plasma.
*
* @author Alexander Wiedenbruch and Matias Valdenegro.
*
* Widgets are the basis for User Interfaces inside Plasma.
* Widgets are rectangular, but can be in any visible shape by just using transparency to mask
* out non-rectangular areas.
*
* To implement a Widget, just subclass Plasma::Widget and implement at minimum, sizeHint() and paint()
*/
class PLASMA_EXPORT Widget : public QGraphicsItem, public LayoutItem
class PLASMA_EXPORT Widget : public QGraphicsItem,
public LayoutItem
{
public:
explicit Widget(QGraphicsItem *parent = 0);
virtual ~Widget();
public:
virtual Qt::Orientations expandingDirections() const;
/**
* Constructor.
*/
explicit Widget(QGraphicsItem *parent = 0);
virtual QSizeF minimumSize() const;
virtual QSizeF maximumSize() const;
/**
* Virtual Destructor.
*/
virtual ~Widget();
virtual bool hasHeightForWidth() const;
virtual qreal heightForWidth(qreal w) const;
/**
* Returns a bitmask with the directions that this Widget can be expanded.
*/
virtual Qt::Orientations expandingDirections() const;
virtual bool hasWidthForHeight() const;
virtual qreal widthForHeight(qreal h) const;
/**
* Returns the minimum size of this Widget and it's contents.
*/
virtual QSizeF minimumSize() const;
QRectF geometry() const;
void setGeometry(const QRectF &geometry);
/**
* Returns the maximum size of this Widget.
*/
virtual QSizeF maximumSize() const;
void updateGeometry();
/**
* Returns true whatever this Widget can use height-for-width layout management,
* false otherwise.
*/
virtual bool hasHeightForWidth() const;
virtual void invalidate();
/**
* Returns the corresponding height for a given width.
* @param w Width
*/
virtual qreal heightForWidth(qreal w) const;
virtual QSizeF sizeHint() const;
/**
* Returns true whatever this Widget can use width-for-height layout management,
* false otherwise.
*/
virtual bool hasWidthForHeight() const;
QSizeF size() const;
/**
* Returns the corresponding width for a given height.
* @param h Height
*/
virtual qreal widthForHeight(qreal h) const;
virtual QRectF boundingRect() const;
/**
* Returns the geometry of this Widget, in parent coordinates.
*/
QRectF geometry() const;
void resize(const QSizeF &size);
void resize(qreal w, qreal h);
/**
* Returns the geometry of this Widget, in local coordinates.
*/
QRectF localGeometry() const;
void setLayout(Layout *l);
Layout *layout() const;
/**
* Sets the geometry of this Widget.
*/
void setGeometry(const QRectF &geometry);
Widget *parent() const;
void reparent(Widget *w);
/**
* Propagates the geometry information to associated layouts and other Widgets.
*/
void updateGeometry();
void addChild(Widget *w);
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
/**
* Invalidates the geometry information.
*/
virtual void invalidate();
/**
* Returns the most appropiate size of this Widget to hold it's contents.
*/
virtual QSizeF sizeHint() const;
/**
* Returns the size of this Widget.
*/
QSizeF size() const;
/**
* Returns the bounding rectangle of this Widget.
*/
virtual QRectF boundingRect() const;
/**
* Resizes this Widget.
* @param size New size
*/
void resize(const QSizeF &size);
/**
* Resizes this Widget.
* @param w New width
* @param h New height
*/
void resize(qreal w, qreal h);
/**
* Sets the Layout that will manage this Widget's childrens.
*/
void setLayout(Layout *l);
/**
* Returns the Layout associated with this Widget.
*/
Layout *layout() const;
/**
* Returns the parent of this Widget.
*/
Widget *parent() const;
/**
* Changes the parent of this Widget.
*/
void reparent(Widget *w);
/**
* Appends a child Widget to this Widget.
*/
void addChild(Widget *w);
/**
* Paint function. Reimplement to draw on this Widget.
*/
virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
private:
class Private;