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Documentation of QML ChartView, Axis and Legend
Documentation of QML ChartView, Axis and Legend

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qaxis.cpp
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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the Qt Commercial Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qaxis.h"
#include "qaxis_p.h"
QTCOMMERCIALCHART_BEGIN_NAMESPACE
/*!
\class QAxis
\brief The QAxis class is used for manipulating chart's axis
and for adding optional axes to the chart.
\mainclass
There is only one x Axis, however there can be multiple y axes.
Each chart series can be bound to exactly one Y axis and the shared common X axis.
Axis can be setup to show axis line with tick marks, grid lines and shades.
*/
/*!
\qmlclass Axis QAxis
\brief The Axis element is used for manipulating chart's axes
There is only one x Axis, however there can be multiple y axes on a ChartView.
Each chart series can be bound to exactly one Y axis and the shared common X axis.
Axis can be setup to show axis line with tick marks, grid lines and shades.
To access Axes you can use ChartView API. For example:
\code
ChartView {
axisX.min: 0
axisX.max: 3
axisX.ticksCount: 4
axisY.min: 0
axisY.max: 4
// Add a few series...
}
\endcode
*/
/*!
\property QAxis::labelsVisible
Defines if axis labels are visible.
*/
/*!
\qmlproperty bool Axis::labelsVisible
Defines if axis labels are visible.
*/
/*!
\property QAxis::min
Defines the minimum value on the axis.
*/
/*!
\qmlproperty real Axis::min
Defines the minimum value on the axis.
*/
/*!
\property QAxis::max
Defines the maximum value on the axis.
*/
/*!
\qmlproperty real Axis::max
Defines the maximum value on the axis.
*/
/*!
\property QAxis::visible
The visibility of the axis.
*/
/*!
\qmlproperty bool Axis::visible
The visibility of the axis.
*/
/*!
\property QAxis::gridVisible
The visibility of the grid lines.
*/
/*!
\qmlproperty bool Axis::gridVisible
The visibility of the grid lines.
*/
/*!
\property QAxis::color
The color of the axis and ticks.
*/
/*!
\qmlproperty color Axis::color
The color of the axis and ticks.
*/
/*!
\property QAxis::labelsColor
The color of the axis labels.
*/
/*!
\qmlproperty color Axis::labelsColor
The color of the axis labels.
*/
/*!
\property QAxis::labelsAngle
The angle of the axis labels in degrees.
*/
/*!
\qmlproperty int Axis::labelsAngle
The angle of the axis labels in degrees.
*/
/*!
\property QAxis::shadesVisible
The visibility of the axis shades.
*/
/*!
\qmlproperty bool Axis::shadesVisible
The visibility of the axis shades.
*/
/*!
\property QAxis::shadesColor
The fill (brush) color of the axis shades.
*/
/*!
\qmlproperty color Axis::shadesColor
The fill (brush) color of the axis shades.
*/
/*!
\property QAxis::shadesBorderColor
The border (pen) color of the axis shades.
*/
/*!
\qmlproperty color Axis::shadesBorderColor
The border (pen) color of the axis shades.
*/
/*!
\property QAxis::ticksCount
The number of tick marks for the axis.
*/
/*!
\qmlproperty int Axis::ticksCount
The number of tick marks for the axis.
*/
/*!
\property QAxis::niceNumbersEnabled
Whether the nice numbers algorithm is enabled or not for the axis.
*/
/*!
\qmlproperty bool Axis::niceNumbersEnabled
Whether the nice numbers algorithm is enabled or not for the axis.
*/
/*!
\fn void QAxis::visibleChanged(bool)
Visiblity of the axis has changed to \a visible.
*/
/*!
\fn void QAxis::labelsVisibleChanged(bool)
Visiblity of the labels of the axis has changed to \a visible.
*/
/*!
\fn void QAxis::gridVisibleChanged(bool)
Visiblity of the grid lines of the axis has changed to \a visible.
*/
/*!
\fn void QAxis::minChanged(qreal min)
Axis emits signal when \a min of axis has changed.
*/
/*!
\fn void QAxis::maxChanged(qreal max)
Axis emits signal when \a max of axis has changed.
*/
/*!
\fn void QAxis::rangeChanged(qreal min, qreal max)
Axis emits signal when \a min or \a max of axis has changed.
*/
/*!
\fn QChartAxisCategories* QAxis::categories()
Returns pointer to the list of categories which correspond to the values on the axis.
*/
/*!
\fn void QAxis::colorChanged(QColor)
Emitted if the \a color of the axis is changed.
*/
/*!
\fn void QAxis::labelsColorChanged(QColor)
Emitted if the \a color of the axis labels is changed.
*/
/*!
\fn void QAxis::labelsAngleChanged(int)
Emitted if the \a angle of the axis labels is changed.
*/
/*!
\fn void QAxis::shadesVisibleChanged(bool)
Emitted if the visibility of the axis shades is changed to \a visible.
*/
/*!
\fn void QAxis::shadesColorChanged(QColor)
Emitted if the \a color of the axis shades is changed.
*/
/*!
\fn void QAxis::shadesBorderColorChanged(QColor)
Emitted if the border \a color of the axis shades is changed.
*/
/*!
\fn void QAxis::ticksCountChanged(int count)
\brief Emits the new \a count of ticks on the axis
Signal is emitted when the number of the ticks on the axis has been changed to a different value.
Parementer count\a count is the new number of ticks on the axis.
*/
/*!
\fn void QAxis::niceNumbersEnabledChanged(bool)
Nice numbers algorithm was \a enabled or disabled.
*/
/*!
Constructs new axis object which is a child of \a parent. Ownership is taken by
QChart when axis added.
*/
QAxis::QAxis(QObject *parent) : QObject(parent),
d_ptr(new QAxisPrivate(this))
{
}
/*!
Destructor of the axis object. When axis is added to chart, chart object takes ownership.
*/
QAxis::~QAxis()
{
}
/*!
Sets \a pen used to draw axis line and ticks.
*/
void QAxis::setAxisPen(const QPen &pen)
{
if (d_ptr->m_axisPen!=pen) {
d_ptr->m_axisPen = pen;
emit d_ptr->updated();
}
}
/*!
Returns pen used to draw axis and ticks.
*/
QPen QAxis::axisPen() const
{
return d_ptr->m_axisPen;
}
void QAxis::setAxisPenColor(QColor color)
{
QPen p = d_ptr->m_axisPen;
if (p.color() != color) {
p.setColor(color);
setAxisPen(p);
emit colorChanged(color);
}
}
QColor QAxis::axisPenColor() const
{
return d_ptr->m_axisPen.color();
}
/*!
Sets if axis and ticks are \a visible.
*/
void QAxis::setAxisVisible(bool visible)
{
if (d_ptr->m_axisVisible != visible) {
d_ptr->m_axisVisible = visible;
emit d_ptr->updated();
emit visibleChanged(visible);
}
}
bool QAxis::isAxisVisible() const
{
return d_ptr->m_axisVisible;
}
void QAxis::setGridLineVisible(bool visible)
{
if (d_ptr->m_gridLineVisible != visible) {
d_ptr->m_gridLineVisible = visible;
emit d_ptr->updated();
emit gridVisibleChanged(visible);
}
}
bool QAxis::isGridLineVisible() const
{
return d_ptr->m_gridLineVisible;
}
/*!
Sets \a pen used to draw grid line.
*/
void QAxis::setGridLinePen(const QPen &pen)
{
if (d_ptr->m_gridLinePen != pen) {
d_ptr->m_gridLinePen = pen;
emit d_ptr->updated();
}
}
/*!
Returns pen used to draw grid.
*/
QPen QAxis::gridLinePen() const
{
return d_ptr->m_gridLinePen;
}
void QAxis::setLabelsVisible(bool visible)
{
if (d_ptr->m_labelsVisible != visible) {
d_ptr->m_labelsVisible = visible;
emit d_ptr->updated();
emit labelsVisibleChanged(visible);
}
}
bool QAxis::labelsVisible() const
{
return d_ptr->m_labelsVisible;
}
/*!
Sets \a pen used to draw labels.
*/
void QAxis::setLabelsPen(const QPen &pen)
{
if (d_ptr->m_labelsPen != pen) {
d_ptr->m_labelsPen = pen;
emit d_ptr->updated();
}
}
/*!
Returns the pen used to labels.
*/
QPen QAxis::labelsPen() const
{
return d_ptr->m_labelsPen;
}
/*!
Sets \a brush used to draw labels.
*/
void QAxis::setLabelsBrush(const QBrush &brush)
{
if (d_ptr->m_labelsBrush != brush) {
d_ptr->m_labelsBrush = brush;
emit d_ptr->updated();
}
}
/*!
Returns brush used to draw labels.
*/
QBrush QAxis::labelsBrush() const
{
return d_ptr->m_labelsBrush;
}
/*!
Sets \a font used to draw labels.
*/
void QAxis::setLabelsFont(const QFont &font)
{
if (d_ptr->m_labelsFont != font) {
d_ptr->m_labelsFont = font;
emit d_ptr->updated();
}
}
/*!
Returns font used to draw labels.
*/
QFont QAxis::labelsFont() const
{
return d_ptr->m_labelsFont;
}
void QAxis::setLabelsAngle(int angle)
{
if (d_ptr->m_labelsAngle != angle) {
d_ptr->m_labelsAngle = angle;
emit d_ptr->updated();
emit labelsAngleChanged(angle);
}
}
int QAxis::labelsAngle() const
{
return d_ptr->m_labelsAngle;
}
void QAxis::setLabelsColor(QColor color)
{
QBrush b = d_ptr->m_labelsBrush;
if (b.color() != color) {
b.setColor(color);
setLabelsBrush(b);
emit labelsColorChanged(color);
}
}
QColor QAxis::labelsColor() const
{
return d_ptr->m_labelsBrush.color();
}
void QAxis::setShadesVisible(bool visible)
{
if (d_ptr->m_shadesVisible != visible) {
d_ptr->m_shadesVisible = visible;
emit d_ptr->updated();
emit shadesVisibleChanged(visible);
}
}
bool QAxis::shadesVisible() const
{
return d_ptr->m_shadesVisible;
}
/*!
Sets \a pen used to draw shades.
*/
void QAxis::setShadesPen(const QPen &pen)
{
if (d_ptr->m_shadesPen != pen) {
d_ptr->m_shadesPen = pen;
emit d_ptr->updated();
}
}
/*!
Returns pen used to draw shades.
*/
QPen QAxis::shadesPen() const
{
return d_ptr->m_shadesPen;
}
/*!
Sets \a brush used to draw shades.
*/
void QAxis::setShadesBrush(const QBrush &brush)
{
if (d_ptr->m_shadesBrush != brush) {
d_ptr->m_shadesBrush = brush;
emit d_ptr->updated();
emit shadesColorChanged(brush.color());
}
}
/*!
\brief Returns brush used to draw shades.
*/
QBrush QAxis::shadesBrush() const
{
return d_ptr->m_shadesBrush;
}
void QAxis::setShadesColor(QColor color)
{
QBrush b = d_ptr->m_shadesBrush;
b.setColor(color);
setShadesBrush(b);
}
QColor QAxis::shadesColor() const
{
return d_ptr->m_shadesBrush.color();
}
void QAxis::setShadesBorderColor(QColor color)
{
QPen p = d_ptr->m_shadesPen;
p.setColor(color);
setShadesPen(p);
}
QColor QAxis::shadesBorderColor() const
{
return d_ptr->m_shadesPen.color();
}
void QAxis::setMin(qreal min)
{
setRange(min,d_ptr->m_max);
}
qreal QAxis::min() const
{
return d_ptr->m_min;
}
void QAxis::setMax(qreal max)
{
setRange(d_ptr->m_min,max);
}
qreal QAxis::max() const
{
return d_ptr->m_max;
}
/*!
Sets range from \a min to \a max on the axis.
*/
void QAxis::setRange(qreal min, qreal max)
{
bool changed = false;
if (!qFuzzyIsNull(d_ptr->m_min - min)) {
d_ptr->m_min = min;
changed = true;
emit minChanged(min);
}
if (!qFuzzyIsNull(d_ptr->m_max - max)) {
d_ptr->m_max = max;
changed = true;
emit maxChanged(max);
}
if (changed) {
emit rangeChanged(d_ptr->m_min,d_ptr->m_max);
emit d_ptr->changed(d_ptr->m_min, d_ptr->m_max, d_ptr->m_ticksCount, d_ptr->m_niceNumbers);
}
}
/*!
Sets \a count for ticks on the axis.
*/
void QAxis::setTicksCount(int count)
{
if (d_ptr->m_ticksCount != count) {
d_ptr->m_ticksCount = count;
emit ticksCountChanged(count);
emit d_ptr->changed(d_ptr->m_min, d_ptr->m_max, d_ptr->m_ticksCount, d_ptr->m_niceNumbers);
}
}
/*!
\fn int QAxis::ticksCount() const
Return number of ticks on the axis
*/
int QAxis::ticksCount() const
{
return d_ptr->m_ticksCount;
}
/*!
Sets axis, shades, labels and grid lines to be visible.
*/
void QAxis::show()
{
d_ptr->m_axisVisible=true;
d_ptr->m_gridLineVisible=true;
d_ptr->m_labelsVisible=true;
d_ptr->m_shadesVisible=true;
emit d_ptr->updated();
}
/*!
Sets axis, shades, labels and grid lines to not be visible.
*/
void QAxis::hide()
{
d_ptr->m_axisVisible = false;
d_ptr->m_gridLineVisible = false;
d_ptr->m_labelsVisible = false;
d_ptr->m_shadesVisible = false;
emit d_ptr->updated();
}
void QAxis::setNiceNumbersEnabled(bool enable)
{
if (d_ptr->m_niceNumbers != enable){
d_ptr->m_niceNumbers = enable;
emit d_ptr->changed(d_ptr->m_min, d_ptr->m_max, d_ptr->m_ticksCount, d_ptr->m_niceNumbers);
emit niceNumbersEnabledChanged(enable);
}
}
bool QAxis::niceNumbersEnabled() const
{
return d_ptr->m_niceNumbers;
}
QAxisCategories* QAxis::categories()
{
return &d_ptr->m_category;
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
QAxisPrivate::QAxisPrivate(QAxis* q):
q_ptr(q),
m_axisVisible(true),
m_gridLineVisible(true),
m_labelsVisible(true),
m_labelsAngle(0),
m_shadesVisible(false),
m_shadesBrush(Qt::SolidPattern),
m_shadesOpacity(1.0),
m_min(0),
m_max(0),
m_ticksCount(5),
m_niceNumbers(false)
{
}
QAxisPrivate::~QAxisPrivate()
{
}
void QAxisPrivate::handleAxisRangeChanged(qreal min, qreal max,int count)
{
q_ptr->setRange(min,max);
q_ptr->setTicksCount(count);
}
QTCOMMERCIALCHART_END_NAMESPACE
QTCOMMERCIALCHART_USE_NAMESPACE
#include "moc_qaxis.cpp"
#include "moc_qaxis_p.cpp"