/usr/include/KChart/KChartLayoutItems.h is in libkchart-dev 2.6.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
*
* This file is part of the KD Chart library.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, 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 General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef KCHARTLAYOUTITEMS_H
#define KCHARTLAYOUTITEMS_H
#include <QBrush>
#include <QFont>
#include <QFontMetricsF>
#include <QLayout>
#include <QLayoutItem>
#include <QPen>
#include "KChartTextAttributes.h"
#include "KChartMarkerAttributes.h"
QT_BEGIN_NAMESPACE
class QPainter;
class KTextDocument;
QT_END_NAMESPACE
// TODO remove
QRectF rotatedRect( const QRectF& pt, qreal rotation );
namespace KChart {
class AbstractDiagram;
class PaintContext;
/**
* Base class for all layout items of KD Chart
* \internal
*/
class KCHART_EXPORT AbstractLayoutItem : public QLayoutItem
{
public:
AbstractLayoutItem( Qt::Alignment itemAlignment = 0 ) :
QLayoutItem( itemAlignment ),
mParent( 0 ),
mParentLayout( 0 ) {}
/**
* Default impl: just call paint.
*
* Derived classes like KChart::AbstractArea are providing
* additional action here.
*/
virtual void paintAll( QPainter& painter );
virtual void paint( QPainter* ) = 0;
virtual void paintCtx( PaintContext* context );
virtual void setParentWidget( QWidget* widget );
virtual void sizeHintChanged() const;
void setParentLayout( QLayout* lay )
{
mParentLayout = lay;
}
QLayout* parentLayout()
{
return mParentLayout;
}
void removeFromParentLayout()
{
if ( mParentLayout ) {
if ( widget() )
mParentLayout->removeWidget( widget() );
else
mParentLayout->removeItem( this );
}
}
protected:
QWidget* mParent;
QLayout* mParentLayout;
};
/**
* Layout item showing a text
*\internal
*/
class KCHART_EXPORT TextLayoutItem : public AbstractLayoutItem
{
public:
TextLayoutItem();
TextLayoutItem( const QString& text,
const TextAttributes& attributes,
const QObject* autoReferenceArea,
KChartEnums::MeasureOrientation autoReferenceOrientation,
Qt::Alignment alignment = 0 );
void setAutoReferenceArea( const QObject* area );
const QObject* autoReferenceArea() const;
void setText(const QString & text);
QString text() const;
void setTextAlignment( Qt::Alignment );
Qt::Alignment textAlignment() const;
void setTextAttributes( const TextAttributes& a );
TextAttributes textAttributes() const;
/** pure virtual in QLayoutItem */
virtual bool isEmpty() const;
/** pure virtual in QLayoutItem */
virtual Qt::Orientations expandingDirections() const;
/** pure virtual in QLayoutItem */
virtual QSize maximumSize() const;
/** pure virtual in QLayoutItem */
virtual QSize minimumSize() const;
/** pure virtual in QLayoutItem */
virtual QSize sizeHint() const;
/** pure virtual in QLayoutItem */
virtual void setGeometry( const QRect& r );
/** pure virtual in QLayoutItem */
virtual QRect geometry() const;
virtual int marginWidth() const;
virtual QSize sizeHintUnrotated() const;
virtual bool intersects( const TextLayoutItem& other, const QPointF& myPos, const QPointF& otherPos ) const;
virtual bool intersects( const TextLayoutItem& other, const QPoint& myPos, const QPoint& otherPos ) const;
virtual qreal realFontSize() const;
virtual QFont realFont() const;
virtual void paint( QPainter* );
QPolygon boundingPolygon() const;
private:
bool maybeUpdateRealFont() const;
QSize unrotatedSizeHint( const QFont& fnt = QFont() ) const;
QSize unrotatedTextSize( QFont fnt = QFont() ) const;
QSize calcSizeHint( const QFont& font ) const;
int marginWidth( const QSize& textSize ) const;
qreal fitFontSizeToGeometry() const;
QRect mRect;
QString mText;
Qt::Alignment mTextAlignment;
TextAttributes mAttributes;
const QObject* mAutoReferenceArea;
KChartEnums::MeasureOrientation mAutoReferenceOrientation;
mutable QSize cachedSizeHint;
mutable QPolygon mCachedBoundingPolygon;
mutable qreal cachedFontSize;
mutable QFont cachedFont;
};
class KCHART_EXPORT TextBubbleLayoutItem : public AbstractLayoutItem
{
public:
TextBubbleLayoutItem();
TextBubbleLayoutItem( const QString& text,
const TextAttributes& attributes,
const QObject* autoReferenceArea,
KChartEnums::MeasureOrientation autoReferenceOrientation,
Qt::Alignment alignment = 0 );
~TextBubbleLayoutItem();
void setAutoReferenceArea( const QObject* area );
const QObject* autoReferenceArea() const;
void setText(const QString & text);
QString text() const;
void setTextAttributes( const TextAttributes& a );
TextAttributes textAttributes() const;
/** pure virtual in QLayoutItem */
virtual bool isEmpty() const;
/** pure virtual in QLayoutItem */
virtual Qt::Orientations expandingDirections() const;
/** pure virtual in QLayoutItem */
virtual QSize maximumSize() const;
/** pure virtual in QLayoutItem */
virtual QSize minimumSize() const;
/** pure virtual in QLayoutItem */
virtual QSize sizeHint() const;
/** pure virtual in QLayoutItem */
virtual void setGeometry( const QRect& r );
/** pure virtual in QLayoutItem */
virtual QRect geometry() const;
virtual void paint( QPainter* painter );
protected:
int borderWidth() const;
private:
TextLayoutItem* const m_text;
};
/**
* Layout item showing a data point marker
* \internal
*/
class KCHART_EXPORT MarkerLayoutItem : public AbstractLayoutItem
{
public:
MarkerLayoutItem( AbstractDiagram* diagram,
const MarkerAttributes& marker,
const QBrush& brush,
const QPen& pen,
Qt::Alignment alignment = 0 );
virtual Qt::Orientations expandingDirections() const;
virtual QRect geometry() const;
virtual bool isEmpty() const;
virtual QSize maximumSize() const;
virtual QSize minimumSize() const;
virtual void setGeometry( const QRect& r );
virtual QSize sizeHint() const;
virtual void paint( QPainter* );
static void paintIntoRect(
QPainter* painter,
const QRect& rect,
AbstractDiagram* diagram,
const MarkerAttributes& marker,
const QBrush& brush,
const QPen& pen );
private:
AbstractDiagram* mDiagram;
QRect mRect;
MarkerAttributes mMarker;
QBrush mBrush;
QPen mPen;
};
/**
* Layout item showing a coloured line
* \internal
*/
class KCHART_EXPORT LineLayoutItem : public AbstractLayoutItem
{
public:
LineLayoutItem( AbstractDiagram* diagram,
int length,
const QPen& pen,
Qt::Alignment mLegendLineSymbolAlignment,
Qt::Alignment alignment = 0 );
virtual Qt::Orientations expandingDirections() const;
virtual QRect geometry() const;
virtual bool isEmpty() const;
virtual QSize maximumSize() const;
virtual QSize minimumSize() const;
virtual void setGeometry( const QRect& r );
virtual QSize sizeHint() const;
void setLegendLineSymbolAlignment(Qt::Alignment legendLineSymbolAlignment);
virtual Qt::Alignment legendLineSymbolAlignment() const;
virtual void paint( QPainter* );
static void paintIntoRect(
QPainter* painter,
const QRect& rect,
const QPen& pen,
Qt::Alignment lineAlignment);
private:
AbstractDiagram* mDiagram; //TODO: not used. remove it
int mLength;
QPen mPen;
QRect mRect;
Qt::Alignment mLegendLineSymbolAlignment;
};
/**
* Layout item showing a coloured line and a data point marker
* \internal
*/
class KCHART_EXPORT LineWithMarkerLayoutItem : public AbstractLayoutItem
{
public:
LineWithMarkerLayoutItem( AbstractDiagram* diagram,
int lineLength,
const QPen& linePen,
int markerOffs,
const MarkerAttributes& marker,
const QBrush& markerBrush,
const QPen& markerPen,
Qt::Alignment alignment = 0 );
virtual Qt::Orientations expandingDirections() const;
virtual QRect geometry() const;
virtual bool isEmpty() const;
virtual QSize maximumSize() const;
virtual QSize minimumSize() const;
virtual void setGeometry( const QRect& r );
virtual QSize sizeHint() const;
virtual void paint( QPainter* );
private:
AbstractDiagram* mDiagram;
QRect mRect;
int mLineLength;
QPen mLinePen;
int mMarkerOffs;
MarkerAttributes mMarker;
QBrush mMarkerBrush;
QPen mMarkerPen;
};
/**
* Layout item showing a horizontal line
* \internal
*/
class KCHART_EXPORT HorizontalLineLayoutItem : public AbstractLayoutItem
{
public:
HorizontalLineLayoutItem();
virtual Qt::Orientations expandingDirections() const;
virtual QRect geometry() const;
virtual bool isEmpty() const;
virtual QSize maximumSize() const;
virtual QSize minimumSize() const;
virtual void setGeometry( const QRect& r );
virtual QSize sizeHint() const;
virtual void paint( QPainter* );
private:
QRect mRect;
};
/**
* Layout item showing a vertial line
* \internal
*/
class KCHART_EXPORT VerticalLineLayoutItem : public AbstractLayoutItem
{
public:
VerticalLineLayoutItem();
virtual Qt::Orientations expandingDirections() const;
virtual QRect geometry() const;
virtual bool isEmpty() const;
virtual QSize maximumSize() const;
virtual QSize minimumSize() const;
virtual void setGeometry( const QRect& r );
virtual QSize sizeHint() const;
virtual void paint( QPainter* );
private:
QRect mRect;
};
/**
* @brief An empty layout item
* \internal
*
* The AutoSpacerLayoutItem is automatically put into each corner cell of
* the planeLayout grid: one of its reference-layouts is a QVBoxLayout (for
* the top, or bottom axes resp.), the other one is a QHBoxLayout (for the
* left/right sided axes).
*
* The spacer reserves enough space so all of the AbstractAreas contained
* in the two reference-layouts can display not only their in-bounds
* content but also their overlapping content reaching out of their area.
*
* KD Chart's layouting is applying this schema:
\verbatim
+------------------+-------------------------+-----------------+
| +--------------+ | +---------------------+ | +-------------+ |
| | | | | QVBoxLayout for | | | | |
| | AUTO | | | the top axis/axes | | | AUTO | |
| | SPACER | | +---------------------+ | | SPACER | |
| | ITEM | | | | | | ITEM | |
| | | | | | | | | |
| +--------------+ | +---------------------+ | +-------------+ |
+------------------+-------------------------+-----------------+
| +--------+-----+ | +---------------------+ | +-------+-----+ |
| | | | | | | | | | | |
| | | | | | | | | | | |
| | QHBox- | | | | | | | Right | | |
| | Layout | | | | | | | | | |
| | | | | | | | | axes | | |
| | for | | | | | | | | | |
| | | | | | | | | layout| | |
| | the | | | | DIAGRAM(s) | | | | | |
| | | | | | | | | | | |
| | left | | | | | | | | | |
| | | | | | | | | | | |
| | axis | | | | | | | | | |
| | or | | | | | | | | | |
| | axes | | | | | | | | | |
| | | | | | | | | | | |
| +--------+-----+ | +---------------------+ | +-------+-----+ |
+------------------+-------------------------+-----------------+
| +--------------+ | +---------------------+ | +-------------+ |
| | | | | QVBoxLayout for | | | | |
| | AUTO | | | the bottom axes | | | AUTO | |
| | SPACER | | +---------------------+ | | SPACER | |
| | ITEM | | | | | | ITEM | |
| | | | | | | | | |
| +--------------+ | +---------------------+ | +-------------+ |
+------------------+-------------------------+-----------------+
\endverbatim
*
* A typical use case is an Abscissa axis with long labels:
\verbatim
2 -|
|
1 -|
|
0 -+------------------------------------
| | | | |
Monday Tuesday Wednesday Thursday Friday
\endverbatim
* The last letters of the word "Friday" would have been
* cut off in previous versions of KD Chart - that is
* if you did not call KChart::Chart::setGlobalLeading().
*
* Now the word will be shown completely because there
* is an auto-spacer-item taking care for the additional
* space needed in the lower/right corner.
*/
class KCHART_EXPORT AutoSpacerLayoutItem : public AbstractLayoutItem
{
public:
AutoSpacerLayoutItem(
bool layoutIsAtTopPosition, QHBoxLayout *rightLeftLayout,
bool layoutIsAtLeftPosition, QVBoxLayout *topBottomLayout );
virtual Qt::Orientations expandingDirections() const;
virtual QRect geometry() const;
virtual bool isEmpty() const;
virtual QSize maximumSize() const;
virtual QSize minimumSize() const;
virtual void setGeometry( const QRect& r );
virtual QSize sizeHint() const;
virtual void paint( QPainter* );
private:
QRect mRect;
bool mLayoutIsAtTopPosition;
QHBoxLayout *mRightLeftLayout;
bool mLayoutIsAtLeftPosition;
QVBoxLayout *mTopBottomLayout;
mutable QBrush mCommonBrush;
mutable QSize mCachedSize;
};
}
#endif /* KCHARTLAYOUTITEMS_H */
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