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Optimize polar chart radius calculation a bit....
Optimize polar chart radius calculation a bit. Current algorithm still results in an occasional extra unneeded iteration, as it uses only crude approximation for radius reduction. However, any speedup gained by accurately calculating needed reduction would be very minor compared to approximations used, so it doesn't seem worth the effort to figure out the complex math. Change-Id: If670a1b058a85cd0305b93f62e6388b463bafd0d Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>
Miikka Heikkinen - - Load All Authors

File last commit:

r2504:54fd83ddb7ed
r2542:189023d9a551
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polarchartaxis.cpp
126 lines | 3.6 KiB | text/x-c | CppLexer
/ src / axis / polarchartaxis.cpp
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Miikka Heikkinen
Add Polar chart support...
 r2483 /****************************************************************************
**
** Copyright (C) 2013 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 "polarchartaxis_p.h"
#include "qabstractaxis_p.h"
#include "chartpresenter_p.h"
QTCOMMERCIALCHART_BEGIN_NAMESPACE
PolarChartAxis::PolarChartAxis(QAbstractAxis *axis, QGraphicsItem *item, bool intervalAxis)
: ChartAxisElement(axis, item, intervalAxis)
{
}
PolarChartAxis::~PolarChartAxis()
{
}
void PolarChartAxis::setGeometry(const QRectF &axis, const QRectF &grid)
{
Q_UNUSED(grid);
setAxisGeometry(axis);
if (isEmpty())
return;
QVector<qreal> layout = calculateLayout();
updateLayout(layout);
}
QRectF PolarChartAxis::gridGeometry() const
{
return QRectF();
}
void PolarChartAxis::updateLayout(QVector<qreal> &layout)
{
int diff = ChartAxisElement::layout().size() - layout.size();
if (animation()) {
switch (presenter()->state()) {
Miikka Heikkinen
Fix some warnings for android build....
 r2504 case ChartPresenter::ZoomInState:
case ChartPresenter::ZoomOutState:
case ChartPresenter::ScrollUpState:
case ChartPresenter::ScrollLeftState:
case ChartPresenter::ScrollDownState:
case ChartPresenter::ScrollRightState:
Miikka Heikkinen
Add Polar chart support...
 r2483 case ChartPresenter::ShowState:
animation()->setAnimationType(AxisAnimation::DefaultAnimation);
break;
}
// Update to "old" geometry before starting animation to avoid incorrectly sized
// axes lingering in wrong position compared to series plot before animation can kick in.
// Note that the position mismatch still exists even with this update, but it will be
// far less ugly.
updateGeometry();
}
if (diff > 0)
deleteItems(diff);
else if (diff < 0)
createItems(-diff);
if (animation()) {
animation()->setValues(ChartAxisElement::layout(), layout);
presenter()->startAnimation(animation());
} else {
setLayout(layout);
updateGeometry();
}
}
bool PolarChartAxis::isEmpty()
{
return !axisGeometry().isValid() || qFuzzyIsNull(min() - max());
}
void PolarChartAxis::deleteItems(int count)
{
QList<QGraphicsItem *> gridLines = gridItems();
QList<QGraphicsItem *> labels = labelItems();
QList<QGraphicsItem *> shades = shadeItems();
QList<QGraphicsItem *> axis = arrowItems();
for (int i = 0; i < count; ++i) {
if (gridItems().size() == 1 || (((gridLines.size() + 1) % 2) && gridLines.size() > 0))
delete(shades.takeLast());
delete(gridLines.takeLast());
delete(labels.takeLast());
delete(axis.takeLast());
}
}
void PolarChartAxis::handleShadesBrushChanged(const QBrush &brush)
{
foreach (QGraphicsItem *item, shadeItems())
static_cast<QGraphicsPathItem *>(item)->setBrush(brush);
}
void PolarChartAxis::handleShadesPenChanged(const QPen &pen)
{
foreach (QGraphicsItem *item, shadeItems())
static_cast<QGraphicsPathItem *>(item)->setPen(pen);
}
#include "moc_polarchartaxis_p.cpp"
QTCOMMERCIALCHART_END_NAMESPACE