/usr/include/KChart/KChartCartesianCoordinatePlane.h is in libkchart-dev 2.6.0-2.
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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 KCHARTCARTESIANCOORDINATEPLANE_H
#define KCHARTCARTESIANCOORDINATEPLANE_H
#include "KChartAbstractCoordinatePlane.h"
namespace KChart {
class Chart;
class PaintContext;
class AbstractDiagram;
class CartesianAxis;
class CartesianGrid;
/**
* @brief Cartesian coordinate plane
*/
class KCHART_EXPORT CartesianCoordinatePlane : public AbstractCoordinatePlane
{
Q_OBJECT
Q_DISABLE_COPY( CartesianCoordinatePlane )
KCHART_DECLARE_PRIVATE_DERIVED_PARENT( CartesianCoordinatePlane, Chart* )
friend class CartesianAxis;
friend class CartesianGrid;
public:
explicit CartesianCoordinatePlane ( Chart* parent = 0 );
~CartesianCoordinatePlane();
void addDiagram ( AbstractDiagram* diagram );
/**
* If @p onOff is true, enforce that X and Y distances are scaled by the same factor.
* This makes the plane's height a function of its width, and hasHeightForWidth()
* will return true.
*/
void setIsometricScaling ( bool onOff );
bool doesIsometricScaling() const;
const QPointF translate ( const QPointF& diagramPoint ) const;
/**
* \sa setZoomFactorX, setZoomCenter
*/
virtual qreal zoomFactorX() const;
/**
* \sa setZoomFactorY, setZoomCenter
*/
virtual qreal zoomFactorY() const;
/**
* \sa setZoomFactorX,setZoomFactorY
*/
virtual void setZoomFactors( qreal factorX, qreal factorY );
/**
* \sa zoomFactorX, setZoomCenter
*/
virtual void setZoomFactorX( qreal factor );
/**
* \sa zoomFactorY, setZoomCenter
*/
virtual void setZoomFactorY( qreal factor );
/**
* \sa setZoomCenter, setZoomFactorX, setZoomFactorY
*/
virtual QPointF zoomCenter() const;
/**
* \sa zoomCenter, setZoomFactorX, setZoomFactorY
*/
virtual void setZoomCenter( const QPointF& center );
/**
* Allows to specify a fixed data-space / coordinate-space relation. If set
* to true then fixed bar widths are used, so you see more bars as the window
* is made wider.
*
* This allows to completely restrict the size of bars in a graph such that,
* upon resizing a window, the graphs coordinate plane will grow (add more
* ticks to x- and y-coordinates) rather than have the image grow.
*/
void setFixedDataCoordinateSpaceRelation( bool fixed );
bool hasFixedDataCoordinateSpaceRelation() const;
/**
* Allows to fix the lower bound of X axis to zero when diagram is in first quadrant.
*
* The default behavior is to lower x or y bound to be 0. If this behaviour is not wanted,
* either \a CartesianCoordinatePlane::setHorizontalRange could be used instead of letting
* KChart auto-adjust the ranges, or this method can be used to disable this behavior.
*/
void setXAxisStartAtZero(bool fixedStart);
bool xAxisStartAtZero() const;
/**
* \brief Set the boundaries of the visible value space displayed in horizontal direction.
*
* This is also known as the horizontal viewport.
*
* By default the horizontal range is adjusted to the range covered by the model's data,
* see setAutoAdjustHorizontalRangeToData for details.
* Calling setHorizontalRange with a valid range disables this default automatic adjusting,
* while on the other hand automatic adjusting will set these ranges.
*
* To disable use of this range you can either pass an empty pair by using the default
* constructor QPair() or you can set both values to the same which constitutes
* a null range.
*
* \note By default the visible data range often is larger than the
* range calculated from the data model (or set by setHoriz.|Vert.Range(), resp.).
* This is due to the built-in grid calculation feature: The visible start/end
* values get adjusted so that they match a main-grid line.
* You can turn this feature off for any of the four bounds by calling
* GridAttributes::setAdjustBoundsToGrid() for either the global grid-attributes
* or for the horizontal/vertical attrs separately.
*
* \note To set only one of the ends of the range to a fixed value while keeping
* the other dynamically adjusted, use std::numeric_limits< qreal >::quiet_NaN()
* for the dynamic value.
*
* \note If you use user defined vertical ranges together with logarithmic scale, only
* positive values are supported. If you set it to negative values, the result is undefined.
*
* \param range a pair of values representing the smalles and the largest
* horizontal value space coordinate displayed.
*
* \sa setAutoAdjustHorizontalRangeToData, setVerticalRange
* \sa GridAttributes::setAdjustBoundsToGrid()
*/
void setHorizontalRange( const QPair<qreal, qreal> & range );
/**
* \brief Set the boundaries of the visible value space displayed in vertical direction.
*
* This is also known as the vertical viewport.
*
* By default the vertical range is adjusted to the range covered by the model's data,
* see setAutoAdjustVerticalRangeToData for details.
* Calling setVerticalRange with a valid range disables this default automatic adjusting,
* while on the other hand automatic adjusting will set these ranges.
*
* To disable use of this range you can either pass an empty pair by using the default
* constructor QPair() or you can set setting both values to the same which constitutes
* a null range.
*
* \note By default the visible data range often is larger than the
* range calculated from the data model (or set by setHoriz.|Vert.Range(), resp.).
* This is due to the built-in grid calculation feature: The visible start/end
* values get adjusted so that they match a main-grid line.
* You can turn this feature off for any of the four bounds by calling
* GridAttributes::setAdjustBoundsToGrid() for either the global grid-attributes
* or for the horizontal/vertical attrs separately.
*
* \note To set only one of the ends of the range to a fixed value while keeping
* the other dynamically adjusted, use std::numeric_limits< qreal >::quiet_NaN()
* for the dynamic value.
*
* \note If you use user defined vertical ranges together with logarithmic scale, only
* positive values are supported. If you set it to negative values, the result is undefined.
*
* \param range a pair of values representing the smalles and the largest
* vertical value space coordinate displayed.
*
* \sa setAutoAdjustVerticalRangeToData, setHorizontalRange
* \sa GridAttributes::setAdjustBoundsToGrid()
*/
void setVerticalRange( const QPair<qreal, qreal> & range );
/**
* @return The largest and smallest visible horizontal value space
* value. If this is not explicitly set,or if both values are the same,
* the plane will use the union of the dataBoundaries of all
* associated diagrams.
* \see KChart::AbstractDiagram::dataBoundaries
*/
QPair<qreal, qreal> horizontalRange() const;
/**
* @return The largest and smallest visible horizontal value space
* value. If this is not explicitly set, or if both values are the same,
* the plane will use the union of the dataBoundaries of all
* associated diagrams.
* \see KChart::AbstractDiagram::dataBoundaries
*/
QPair<qreal, qreal> verticalRange() const;
/**
* \brief Automatically adjust horizontal range settings to the ranges covered by
* the model's values, when ever the data have changed, and then emit horizontalRangeAutomaticallyAdjusted.
*
* By default the horizontal range is adjusted automatically, if more than 67 percent of
* the available horizontal space would be empty otherwise.
*
* Range setting is adjusted if more than \c percentEmpty percent of the horizontal
* space covered by the coordinate plane would otherwise be empty.
* Automatic range adjusting can happen, when either all of the data are positive or all are negative.
*
* Set percentEmpty to 100 to disable automatic range adjusting.
*
* \param percentEmpty The maximal percentage of horizontal space that may be empty.
*
* \sa horizontalRangeAutomaticallyAdjusted
* \sa autoAdjustHorizontalRangeToData, adjustRangesToData
* \sa setHorizontalRange, setVerticalRange
* \sa setAutoAdjustVerticalRangeToData
*/
void setAutoAdjustHorizontalRangeToData( unsigned int percentEmpty = 67 );
/**
* \brief Automatically adjust vertical range settings to the ranges covered by
* the model's values, when ever the data have changed, and then emit verticalRangeAutomaticallyAdjusted.
*
* By default the vertical range is adjusted automatically, if more than 67 percent of
* the available vertical space would be empty otherwise.
*
* Range setting is adjusted if more than \c percentEmpty percent of the horizontal
* space covered by the coordinate plane would otherwise be empty.
* Automatic range adjusting can happen, when either all of the data are positive or all are negative.
*
* Set percentEmpty to 100 to disable automatic range adjusting.
*
* \param percentEmpty The maximal percentage of horizontal space that may be empty.
*
* \sa verticalRangeAutomaticallyAdjusted
* \sa autoAdjustVerticalRangeToData, adjustRangesToData
* \sa setHorizontalRange, setVerticalRange
* \sa setAutoAdjustHorizontalRangeToData
*/
void setAutoAdjustVerticalRangeToData( unsigned int percentEmpty = 67 );
/**
* \brief Returns the maximal allowed percent of the horizontal
* space covered by the coordinate plane that may be empty.
*
* \return A percent value indicating how much of the horizontal space may be empty.
* If more than this is empty, automatic range adjusting is applied.
* A return value of 100 indicates that no such automatic adjusting is done at all.
*
* \sa setAutoAdjustHorizontalRangeToData, adjustRangesToData
*/
unsigned int autoAdjustHorizontalRangeToData() const;
/**
* \brief Returns the maximal allowed percent of the vertical
* space covered by the coordinate plane that may be empty.
*
* \return A percent value indicating how much of the vertical space may be empty.
* If more than this is empty, automatic range adjusting is applied.
* A return value of 100 indicates that no such automatic adjusting is done at all.
*
* \sa setAutoAdjustVerticalRangeToData, adjustRangesToData
*/
unsigned int autoAdjustVerticalRangeToData() const;
/**
* Set the attributes to be used for grid lines drawn in horizontal
* direction (or in vertical direction, resp.).
*
* To disable horizontal grid painting, for example, your code should like this:
* \code
* GridAttributes ga = plane->gridAttributes( Qt::Horizontal );
* ga.setGridVisible( false );
* plane-setGridAttributes( Qt::Horizontal, ga );
* \endcode
*
* \note setGridAttributes overwrites the global attributes that
* were set by AbstractCoordinatePlane::setGlobalGridAttributes.
* To re-activate these global attributes you can call
* resetGridAttributes.
*
* \sa resetGridAttributes, gridAttributes
* \sa setAutoAdjustGridToZoom
* \sa AbstractCoordinatePlane::setGlobalGridAttributes
* \sa hasOwnGridAttributes
*/
void setGridAttributes( Qt::Orientation orientation, const GridAttributes & );
/**
* Reset the attributes to be used for grid lines drawn in horizontal
* direction (or in vertical direction, resp.).
* By calling this method you specify that the global attributes set by
* AbstractCoordinatePlane::setGlobalGridAttributes be used.
*
* \sa setGridAttributes, gridAttributes
* \sa setAutoAdjustGridToZoom
* \sa AbstractCoordinatePlane::globalGridAttributes
* \sa hasOwnGridAttributes
*/
void resetGridAttributes( Qt::Orientation orientation );
/**
* \return The attributes used for grid lines drawn in horizontal
* direction (or in vertical direction, resp.).
*
* \note This function always returns a valid set of grid attributes:
* If no special grid attributes were set foe this orientation
* the global attributes are returned, as returned by
* AbstractCoordinatePlane::globalGridAttributes.
*
* \sa setGridAttributes
* \sa resetGridAttributes
* \sa AbstractCoordinatePlane::globalGridAttributes
* \sa hasOwnGridAttributes
*/
const GridAttributes gridAttributes( Qt::Orientation orientation ) const;
/**
* \return Returns whether the grid attributes have been set for the
* respective direction via setGridAttributes( orientation ).
*
* If false, the grid will use the global attributes set
* by AbstractCoordinatePlane::globalGridAttributes (or the default
* attributes, resp.)
*
* \sa setGridAttributes
* \sa resetGridAttributes
* \sa AbstractCoordinatePlane::globalGridAttributes
*/
bool hasOwnGridAttributes( Qt::Orientation orientation ) const;
/**
* Disable / re-enable the built-in grid adjusting feature.
*
* By default additional lines will be drawn in a Linear grid when zooming in.
*
* \sa autoAdjustGridToZoom, setGridAttributes
*/
void setAutoAdjustGridToZoom( bool autoAdjust );
/**
* Return the status of the built-in grid adjusting feature.
*
* \sa setAutoAdjustGridToZoom
*/
#if defined(Q_COMPILER_MANGLES_RETURN_TYPE)
const bool autoAdjustGridToZoom() const;
#else
bool autoAdjustGridToZoom() const;
#endif
AxesCalcMode axesCalcModeY() const;
AxesCalcMode axesCalcModeX() const;
/** Specifies the calculation modes for all axes */
void setAxesCalcModes( AxesCalcMode mode );
/** Specifies the calculation mode for all Ordinate axes */
void setAxesCalcModeY( AxesCalcMode mode );
/** Specifies the calculation mode for all Abscissa axes */
void setAxesCalcModeX( AxesCalcMode mode );
/** reimpl */
virtual void paint( QPainter* );
/** reimpl */
AbstractCoordinatePlane* sharedAxisMasterPlane( QPainter* p = 0 );
/**
* Returns the currently visible data range. Might be greater than the
* range of the grid.
*/
QRectF visibleDataRange() const;
/**
* Returns the logical area, i.e., the rectangle defined by the very top
* left and very bottom right coordinate.
*/
QRectF logicalArea() const;
/**
* Returns the (physical) area occupied by the diagram. Unless zoom is applied
* (which is also true when a fixed data coordinate / space relation is used),
* \code diagramArea() == drawingArea() \endcode .
* \sa setFixedDataCoordinateSpaceRelation
* \sa drawingArea
*/
QRectF diagramArea() const;
/**
* Returns the visible part of the diagram area, i.e.
* \code diagramArea().intersected( drawingArea() ) \endcode
* \sa diagramArea
*/
QRectF visibleDiagramArea() const;
/**
* Sets whether the horizontal range should be reversed or not, i.e.
* small values to the left and large values to the right (the default)
* or vice versa.
* \param reverse Whether the horizontal range should be reversed or not
*/
void setHorizontalRangeReversed( bool reverse );
/**
* \return Whether the horizontal range is reversed or not
*/
bool isHorizontalRangeReversed() const;
/**
* Sets whether the vertical range should be reversed or not, i.e.
* small values at the bottom and large values at the top (the default)
* or vice versa.
* \param reverse Whether the vertical range should be reversed or not
*/
void setVerticalRangeReversed( bool reverse );
/**
* \return Whether the vertical range is reversed or not
*/
bool isVerticalRangeReversed() const;
/**
* reimplemented from AbstractCoordinatePlane
*/
void setGeometry( const QRect& r );
// reimplemented
Qt::Orientations expandingDirections() const;
public Q_SLOTS:
/**
* \brief Adjust both, horizontal and vertical range settings to the
* ranges covered by the model's data values.
*
* \sa setHorizontalRange, setVerticalRange
* \sa adjustHorizontalRangeToData, adjustVerticalRangeToData
* \sa setAutoAdjustHorizontalRangeToData, setAutoAdjustVerticalRangeToData
*/
void adjustRangesToData();
/**
* Adjust horizontal range settings to the ranges covered by the model's data values.
* \sa adjustRangesToData
*/
void adjustHorizontalRangeToData();
/**
* Adjust vertical range settings to the ranges covered by the model's data values.
* \sa adjustRangesToData
*/
void adjustVerticalRangeToData();
protected:
QRectF getRawDataBoundingRectFromDiagrams() const;
QRectF adjustedToMaxEmptyInnerPercentage(
const QRectF& r, unsigned int percentX, unsigned int percentY ) const;
virtual QRectF calculateRawDataBoundingRect() const;
virtual DataDimensionsList getDataDimensionsList() const;
// the whole drawing area, includes diagrams and axes, but maybe smaller
// than (width, height):
virtual QRectF drawingArea() const;
public:
const QPointF translateBack( const QPointF& screenPoint ) const;
protected:
void paintEvent ( QPaintEvent* );
void layoutDiagrams();
// the following three return true if the new value is different from the old
bool doneSetZoomFactorX( qreal factor );
bool doneSetZoomFactorY( qreal factor );
bool doneSetZoomCenter( const QPointF& center );
void handleFixedDataCoordinateSpaceRelation( const QRectF& geometry );
// reimplemented from QLayoutItem, via AbstractLayoutItem, AbstractArea, AbstractCoordinatePlane
bool hasHeightForWidth() const;
int heightForWidth( int w ) const;
QSize sizeHint() const;
protected Q_SLOTS:
void slotLayoutChanged( AbstractDiagram* );
private:
void setHasOwnGridAttributes(
Qt::Orientation orientation, bool on );
};
}
#endif
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