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https://github.com/GoldenCheetah/GoldenCheetah.git
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359 lines
7.8 KiB
C++
359 lines
7.8 KiB
C++
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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* Qwt Widget Library
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* Copyright (C) 1997 Josef Wilgen
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* Copyright (C) 2002 Uwe Rathmann
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the Qwt License, Version 1.0
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*****************************************************************************/
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#include <qpainter.h>
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#include <qpen.h>
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#include "qwt_painter.h"
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#include "qwt_text.h"
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#include "qwt_scale_map.h"
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#include "qwt_scale_div.h"
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#include "qwt_plot_grid.h"
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class QwtPlotGrid::PrivateData
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{
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public:
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PrivateData():
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xEnabled(true),
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yEnabled(true),
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xMinEnabled(false),
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yMinEnabled(false)
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{
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}
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bool xEnabled;
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bool yEnabled;
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bool xMinEnabled;
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bool yMinEnabled;
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QwtScaleDiv xScaleDiv;
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QwtScaleDiv yScaleDiv;
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QPen majPen;
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QPen minPen;
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};
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//! Enables major grid, disables minor grid
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QwtPlotGrid::QwtPlotGrid():
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QwtPlotItem(QwtText("Grid"))
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{
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d_data = new PrivateData;
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setZ(10.0);
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}
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//! Destructor
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QwtPlotGrid::~QwtPlotGrid()
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{
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delete d_data;
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}
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//! \return QwtPlotItem::Rtti_PlotGrid
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int QwtPlotGrid::rtti() const
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{
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return QwtPlotItem::Rtti_PlotGrid;
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}
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/*!
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\brief Enable or disable vertical gridlines
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\param tf Enable (true) or disable
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\sa Minor gridlines can be enabled or disabled with
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enableXMin()
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*/
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void QwtPlotGrid::enableX(bool tf)
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{
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if ( d_data->xEnabled != tf )
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{
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d_data->xEnabled = tf;
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itemChanged();
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}
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}
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/*!
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\brief Enable or disable horizontal gridlines
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\param tf Enable (true) or disable
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\sa Minor gridlines can be enabled or disabled with enableYMin()
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*/
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void QwtPlotGrid::enableY(bool tf)
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{
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if ( d_data->yEnabled != tf )
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{
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d_data->yEnabled = tf;
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itemChanged();
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}
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}
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/*!
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\brief Enable or disable minor vertical gridlines.
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\param tf Enable (true) or disable
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\sa enableX()
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*/
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void QwtPlotGrid::enableXMin(bool tf)
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{
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if ( d_data->xMinEnabled != tf )
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{
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d_data->xMinEnabled = tf;
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itemChanged();
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}
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}
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/*!
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\brief Enable or disable minor horizontal gridlines
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\param tf Enable (true) or disable
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\sa enableY()
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*/
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void QwtPlotGrid::enableYMin(bool tf)
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{
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if ( d_data->yMinEnabled != tf )
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{
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d_data->yMinEnabled = tf;
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itemChanged();
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}
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}
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/*!
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Assign an x axis scale division
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\param scaleDiv Scale division
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*/
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void QwtPlotGrid::setXDiv(const QwtScaleDiv &scaleDiv)
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{
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if ( d_data->xScaleDiv != scaleDiv )
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{
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d_data->xScaleDiv = scaleDiv;
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itemChanged();
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}
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}
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/*!
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Assign a y axis division
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\param scaleDiv Scale division
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*/
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void QwtPlotGrid::setYDiv(const QwtScaleDiv &scaleDiv)
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{
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if ( d_data->yScaleDiv != scaleDiv )
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{
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d_data->yScaleDiv = scaleDiv;
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itemChanged();
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}
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}
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/*!
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Assign a pen for both major and minor gridlines
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The width of non cosmetic pens is scaled according to the resolution
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of the paint device.
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\param pen Pen
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\sa setMajPen(), setMinPen(), QwtPainter::scaledPen()
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*/
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void QwtPlotGrid::setPen(const QPen &pen)
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{
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if ( d_data->majPen != pen || d_data->minPen != pen )
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{
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d_data->majPen = pen;
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d_data->minPen = pen;
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itemChanged();
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}
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}
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/*!
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Assign a pen for the major gridlines
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The width of non cosmetic pens is scaled according to the resolution
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of the paint device.
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\param pen Pen
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\sa majPen(), setMinPen(), setPen(), QwtPainter::scaledPen()
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*/
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void QwtPlotGrid::setMajPen(const QPen &pen)
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{
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if ( d_data->majPen != pen )
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{
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d_data->majPen = pen;
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itemChanged();
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}
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}
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/*!
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Assign a pen for the minor gridlines
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The width of non cosmetic pens is scaled according to the resolution
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of the paint device.
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\param pen Pen
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\sa minPen(), setMajPen(), setPen(), QwtPainter::scaledPen()
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*/
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void QwtPlotGrid::setMinPen(const QPen &pen)
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{
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if ( d_data->minPen != pen )
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{
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d_data->minPen = pen;
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itemChanged();
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}
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}
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/*!
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\brief Draw the grid
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The grid is drawn into the bounding rectangle such that
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gridlines begin and end at the rectangle's borders. The X and Y
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maps are used to map the scale divisions into the drawing region
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screen.
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\param painter Painter
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\param xMap X axis map
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\param yMap Y axis
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\param canvasRect Contents rect of the plot canvas
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*/
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void QwtPlotGrid::draw(QPainter *painter,
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const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QRect &canvasRect) const
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{
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// draw minor gridlines
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painter->setPen(QwtPainter::scaledPen(d_data->minPen));
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if (d_data->xEnabled && d_data->xMinEnabled)
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{
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drawLines(painter, canvasRect, Qt::Vertical, xMap,
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d_data->xScaleDiv.ticks(QwtScaleDiv::MinorTick));
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drawLines(painter, canvasRect, Qt::Vertical, xMap,
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d_data->xScaleDiv.ticks(QwtScaleDiv::MediumTick));
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}
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if (d_data->yEnabled && d_data->yMinEnabled)
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{
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drawLines(painter, canvasRect, Qt::Horizontal, yMap,
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d_data->yScaleDiv.ticks(QwtScaleDiv::MinorTick));
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drawLines(painter, canvasRect, Qt::Horizontal, yMap,
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d_data->yScaleDiv.ticks(QwtScaleDiv::MediumTick));
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}
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// draw major gridlines
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painter->setPen(QwtPainter::scaledPen(d_data->majPen));
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if (d_data->xEnabled)
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{
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drawLines(painter, canvasRect, Qt::Vertical, xMap,
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d_data->xScaleDiv.ticks(QwtScaleDiv::MajorTick));
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}
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if (d_data->yEnabled)
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{
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drawLines(painter, canvasRect, Qt::Horizontal, yMap,
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d_data->yScaleDiv.ticks(QwtScaleDiv::MajorTick));
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}
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}
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void QwtPlotGrid::drawLines(QPainter *painter, const QRect &canvasRect,
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Qt::Orientation orientation, const QwtScaleMap &scaleMap,
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const QwtValueList &values) const
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{
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const int x1 = canvasRect.left();
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const int x2 = canvasRect.right();
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const int y1 = canvasRect.top();
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const int y2 = canvasRect.bottom();
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for (uint i = 0; i < (uint)values.count(); i++)
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{
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const int value = scaleMap.transform(values[i]);
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if ( orientation == Qt::Horizontal )
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{
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if ((value >= y1) && (value <= y2))
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QwtPainter::drawLine(painter, x1, value, x2, value);
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}
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else
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{
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if ((value >= x1) && (value <= x2))
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QwtPainter::drawLine(painter, value, y1, value, y2);
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}
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}
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}
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/*!
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\return the pen for the major gridlines
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\sa setMajPen(), setMinPen(), setPen()
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*/
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const QPen &QwtPlotGrid::majPen() const
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{
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return d_data->majPen;
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}
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/*!
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\return the pen for the minor gridlines
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\sa setMinPen(), setMajPen(), setPen()
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*/
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const QPen &QwtPlotGrid::minPen() const
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{
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return d_data->minPen;
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}
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/*!
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\return true if vertical gridlines are enabled
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\sa enableX()
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*/
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bool QwtPlotGrid::xEnabled() const
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{
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return d_data->xEnabled;
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}
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/*!
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\return true if minor vertical gridlines are enabled
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\sa enableXMin()
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*/
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bool QwtPlotGrid::xMinEnabled() const
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{
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return d_data->xMinEnabled;
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}
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/*!
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\return true if horizontal gridlines are enabled
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\sa enableY()
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*/
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bool QwtPlotGrid::yEnabled() const
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{
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return d_data->yEnabled;
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}
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/*!
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\return true if minor horizontal gridlines are enabled
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\sa enableYMin()
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*/
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bool QwtPlotGrid::yMinEnabled() const
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{
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return d_data->yMinEnabled;
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}
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/*! \return the scale division of the x axis */
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const QwtScaleDiv &QwtPlotGrid::xScaleDiv() const
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{
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return d_data->xScaleDiv;
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}
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/*! \return the scale division of the y axis */
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const QwtScaleDiv &QwtPlotGrid::yScaleDiv() const
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{
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return d_data->yScaleDiv;
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}
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/*!
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Update the grid to changes of the axes scale division
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\param xScaleDiv Scale division of the x-axis
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\param yScaleDiv Scale division of the y-axis
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\sa QwtPlot::updateAxes()
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*/
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void QwtPlotGrid::updateScaleDiv(const QwtScaleDiv& xScaleDiv,
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const QwtScaleDiv& yScaleDiv)
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{
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setXDiv(xScaleDiv);
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setYDiv(yScaleDiv);
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}
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