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Optimize string truncation algorithm...
Optimize string truncation algorithm Use binary search for truncating strings instead of linear search. Change-Id: I31cde493328e3192a53802aa65dea61975b9e87f Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

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r2541:563b21497627
r2541:563b21497627
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chartpresenter.cpp
488 lines | 13.1 KiB | text/x-c | CppLexer
/ src / chartpresenter.cpp
Jani Honkonen
Add license headers
r794 /****************************************************************************
Michal Klocek
Fixes header guard style issues
r969 **
Miikka Heikkinen
Fixed the copyright year 2012 -> 2013
r2432 ** Copyright (C) 2013 Digia Plc
Michal Klocek
Fixes header guard style issues
r969 ** 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 "chartpresenter_p.h"
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r139 #include "qchart.h"
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r2273 #include "chartitem_p.h"
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r855 #include "qchart_p.h"
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r1541 #include "qabstractaxis.h"
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r1556 #include "qabstractaxis_p.h"
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r131 #include "chartdataset_p.h"
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r1241 #include "chartanimation_p.h"
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Renamed QSeries to QAbstractSeries
r988 #include "qabstractseries_p.h"
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Adds area chart...
r421 #include "qareaseries.h"
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r2483 #include "chartaxiselement_p.h"
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Changes QChartAxis -> QAxis
r1006 #include "chartbackground_p.h"
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r2483 #include "cartesianchartlayout_p.h"
#include "polarchartlayout_p.h"
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r1965 #include "charttitle_p.h"
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r1241 #include <QTimer>
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r131
QTCOMMERCIALCHART_BEGIN_NAMESPACE
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r2541 static QGraphicsTextItem *dummyTextItem = 0;
static const char *truncateMatchString = "&#?[0-9a-zA-Z]*;$";
static QRegExp *truncateMatcher = 0;
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r2539 class StaticDummyTextDeleter
{
public:
StaticDummyTextDeleter() {}
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r2541 ~StaticDummyTextDeleter()
{
delete dummyTextItem;
delete truncateMatcher;
}
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r2539 };
StaticDummyTextDeleter staticDummyTextDeleter;
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r2483 ChartPresenter::ChartPresenter(QChart *chart, QChart::ChartType type)
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src folder: another massive victory for coding style police
r2131 : QObject(chart),
m_chart(chart),
m_options(QChart::NoAnimation),
m_state(ShowState),
m_background(0),
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r2498 m_plotAreaBackground(0),
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src folder: another massive victory for coding style police
r2131 m_title(0)
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r131 {
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r2483 if (type == QChart::ChartTypeCartesian)
m_layout = new CartesianChartLayout(this);
else if (type == QChart::ChartTypePolar)
m_layout = new PolarChartLayout(this);
Q_ASSERT(m_layout);
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r131 }
ChartPresenter::~ChartPresenter()
{
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r2273
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r131 }
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r2273 void ChartPresenter::setGeometry(const QRectF rect)
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r131 {
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r2483 if (m_rect != rect) {
m_rect = rect;
foreach (ChartItem *chart, m_chartItems) {
chart->domain()->setSize(rect.size());
chart->setPos(rect.topLeft());
}
}
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r2273 }
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r1698
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r2273 QRectF ChartPresenter::geometry() const
{
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r2483 return m_rect;
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r2273 }
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r1698
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r2273 void ChartPresenter::handleAxisAdded(QAbstractAxis *axis)
{
axis->d_ptr->initializeGraphics(rootItem());
axis->d_ptr->initializeAnimations(m_options);
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r2483 ChartAxisElement *item = axis->d_ptr->axisItem();
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r2273 item->setPresenter(this);
item->setThemeManager(m_chart->d_ptr->m_themeManager);
m_axisItems<<item;
m_axes<<axis;
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r2105 m_layout->invalidate();
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r223 }
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src folder: another massive victory for coding style police
r2131 void ChartPresenter::handleAxisRemoved(QAbstractAxis *axis)
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r223 {
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r2483 ChartAxisElement *item = axis->d_ptr->m_item.take();
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Refactor Visibly methods of axis...
r1729 item->hide();
item->disconnect();
sauimone
fixed bug in series deletion
r1562 item->deleteLater();
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Refactors internals...
r2273 m_axisItems.removeAll(item);
m_axes.removeAll(axis);
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Removes legacy code - selectVisibleAxis
r2154 m_layout->invalidate();
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r223 }
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r2273 void ChartPresenter::handleSeriesAdded(QAbstractSeries *series)
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r131 {
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r2273 series->d_ptr->initializeGraphics(rootItem());
series->d_ptr->initializeAnimations(m_options);
ChartItem *chart = series->d_ptr->chartItem();
chart->setPresenter(this);
chart->setThemeManager(m_chart->d_ptr->m_themeManager);
chart->domain()->setSize(m_rect.size());
chart->setPos(m_rect.topLeft());
chart->handleDomainUpdated(); //this could be moved to intializeGraphics when animator is refactored
m_chartItems<<chart;
m_series<<series;
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r2105 m_layout->invalidate();
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r131 }
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src folder: another massive victory for coding style police
r2131 void ChartPresenter::handleSeriesRemoved(QAbstractSeries *series)
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r139 {
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r2273 ChartItem *chart = series->d_ptr->m_item.take();
chart->hide();
chart->disconnect();
chart->deleteLater();
m_chartItems.removeAll(chart);
m_series.removeAll(series);
m_layout->invalidate();
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Adds missing ids to theme classes
r153 }
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Adds animation settings handling
r298 void ChartPresenter::setAnimationOptions(QChart::AnimationOptions options)
{
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src folder: another massive victory for coding style police
r2131 if (m_options != options) {
m_options = options;
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Animation refactor...
r530
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r2273 foreach(QAbstractSeries* series, m_series){
series->d_ptr->initializeAnimations(m_options);
}
foreach(QAbstractAxis* axis, m_axes){
axis->d_ptr->initializeAnimations(m_options);
}
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src folder: another massive victory for coding style police
r2131 }
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r531 }
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r2273 void ChartPresenter::setState(State state,QPointF point)
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r439 {
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r2273 m_state=state;
m_statePoint=point;
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r531 }
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r298 QChart::AnimationOptions ChartPresenter::animationOptions() const
{
return m_options;
}
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r1534 void ChartPresenter::createBackgroundItem()
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r855 {
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r1965 if (!m_background) {
m_background = new ChartBackground(rootItem());
Miikka Heikkinen
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r2516 m_background->setPen(Qt::NoPen); // Theme doesn't touch pen so don't use default
m_background->setBrush(QChartPrivate::defaultBrush());
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r1965 m_background->setZValue(ChartPresenter::BackgroundZValue);
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r1534 }
}
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r855
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r2498 void ChartPresenter::createPlotAreaBackgroundItem()
{
if (!m_plotAreaBackground) {
if (m_chart->chartType() == QChart::ChartTypeCartesian)
m_plotAreaBackground = new QGraphicsRectItem(rootItem());
else
m_plotAreaBackground = new QGraphicsEllipseItem(rootItem());
// Use transparent pen instead of Qt::NoPen, as Qt::NoPen causes
// antialising artifacts with axis lines for some reason.
m_plotAreaBackground->setPen(QPen(Qt::transparent));
m_plotAreaBackground->setBrush(Qt::NoBrush);
m_plotAreaBackground->setZValue(ChartPresenter::PlotAreaZValue);
m_plotAreaBackground->setVisible(false);
}
}
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r1534 void ChartPresenter::createTitleItem()
{
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r1965 if (!m_title) {
m_title = new ChartTitle(rootItem());
m_title->setZValue(ChartPresenter::BackgroundZValue);
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r1534 }
}
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r1524
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r855
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Refactors layout managment...
r1534 void ChartPresenter::handleAnimationFinished()
{
Jani Honkonen
src folder: another massive victory for coding style police
r2131 m_animations.removeAll(qobject_cast<ChartAnimation *>(sender()));
if (m_animations.empty())
emit animationsFinished();
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r1534 }
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r855
Jani Honkonen
src folder: another massive victory for coding style police
r2131 void ChartPresenter::startAnimation(ChartAnimation *animation)
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r1534 {
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r2105 if (animation->state() != QAbstractAnimation::Stopped) animation->stop();
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src folder: another massive victory for coding style police
r2131 QObject::connect(animation, SIGNAL(finished()), this, SLOT(handleAnimationFinished()), Qt::UniqueConnection);
if (!m_animations.isEmpty())
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r1534 m_animations.append(animation);
QTimer::singleShot(0, animation, SLOT(start()));
}
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r855
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src folder: another massive victory for coding style police
r2131 void ChartPresenter::setBackgroundBrush(const QBrush &brush)
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r1534 {
createBackgroundItem();
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r1965 m_background->setBrush(brush);
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r1534 m_layout->invalidate();
}
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r855
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r1534 QBrush ChartPresenter::backgroundBrush() const
{
Jani Honkonen
src folder: another massive victory for coding style police
r2131 if (!m_background)
return QBrush();
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r1965 return m_background->brush();
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Refactors layout managment...
r1534 }
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r855
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src folder: another massive victory for coding style police
r2131 void ChartPresenter::setBackgroundPen(const QPen &pen)
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r1534 {
createBackgroundItem();
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r1965 m_background->setPen(pen);
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r1534 m_layout->invalidate();
}
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r855
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Refactors layout managment...
r1534 QPen ChartPresenter::backgroundPen() const
{
Jani Honkonen
src folder: another massive victory for coding style police
r2131 if (!m_background)
return QPen();
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Refactors layout...
r1965 return m_background->pen();
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Refactors layout managment...
r1534 }
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r913
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r2498 void ChartPresenter::setPlotAreaBackgroundBrush(const QBrush &brush)
{
createPlotAreaBackgroundItem();
m_plotAreaBackground->setBrush(brush);
m_layout->invalidate();
}
QBrush ChartPresenter::plotAreaBackgroundBrush() const
{
if (!m_plotAreaBackground)
return QBrush();
return m_plotAreaBackground->brush();
}
void ChartPresenter::setPlotAreaBackgroundPen(const QPen &pen)
{
createPlotAreaBackgroundItem();
m_plotAreaBackground->setPen(pen);
m_layout->invalidate();
}
QPen ChartPresenter::plotAreaBackgroundPen() const
{
if (!m_plotAreaBackground)
return QPen();
return m_plotAreaBackground->pen();
}
Jani Honkonen
src folder: another massive victory for coding style police
r2131 void ChartPresenter::setTitle(const QString &title)
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Refactors layout managment...
r1534 {
createTitleItem();
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Refactors layout...
r1965 m_title->setText(title);
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Refactors layout managment...
r1534 m_layout->invalidate();
}
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r913
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Refactors layout managment...
r1534 QString ChartPresenter::title() const
{
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src folder: another massive victory for coding style police
r2131 if (!m_title)
return QString();
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r1965 return m_title->text();
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Refactors layout managment...
r1534 }
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r855
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src folder: another massive victory for coding style police
r2131 void ChartPresenter::setTitleFont(const QFont &font)
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r1534 {
createTitleItem();
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r1965 m_title->setFont(font);
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r1534 m_layout->invalidate();
}
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r855
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Refactors layout managment...
r1534 QFont ChartPresenter::titleFont() const
{
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src folder: another massive victory for coding style police
r2131 if (!m_title)
return QFont();
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r1965 return m_title->font();
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r1534 }
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r913
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Refactors layout managment...
r1534 void ChartPresenter::setTitleBrush(const QBrush &brush)
{
createTitleItem();
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r2539 m_title->setDefaultTextColor(brush.color());
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r1534 m_layout->invalidate();
}
Michal Klocek
Bugfixes for unnesery geometry changes
r869
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Refactors layout managment...
r1534 QBrush ChartPresenter::titleBrush() const
{
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src folder: another massive victory for coding style police
r2131 if (!m_title)
return QBrush();
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r2539 return QBrush(m_title->defaultTextColor());
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r1534 }
void ChartPresenter::setBackgroundVisible(bool visible)
{
createBackgroundItem();
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r1965 m_background->setVisible(visible);
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Refactors layout managment...
r1534 }
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Refactor , move dataset legend presentr connections to one place
r871
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Refactor qledgend handling...
r855
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Refactors layout managment...
r1534 bool ChartPresenter::isBackgroundVisible() const
{
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src folder: another massive victory for coding style police
r2131 if (!m_background)
return false;
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r1965 return m_background->isVisible();
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r855 }
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Add API to specify plot area background....
r2498 void ChartPresenter::setPlotAreaBackgroundVisible(bool visible)
{
createPlotAreaBackgroundItem();
m_plotAreaBackground->setVisible(visible);
}
bool ChartPresenter::isPlotAreaBackgroundVisible() const
{
if (!m_plotAreaBackground)
return false;
return m_plotAreaBackground->isVisible();
}
Michal Klocek
Refactors layout managment...
r1534 void ChartPresenter::setBackgroundDropShadowEnabled(bool enabled)
Michal Klocek
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r855 {
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r1534 createBackgroundItem();
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Refactors layout...
r1965 m_background->setDropShadowEnabled(enabled);
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r855 }
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Refactors layout managment...
r1534 bool ChartPresenter::isBackgroundDropShadowEnabled() const
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Refactor qledgend handling...
r855 {
Jani Honkonen
src folder: another massive victory for coding style police
r2131 if (!m_background)
return false;
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Refactors layout...
r1965 return m_background->isDropShadowEnabled();
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Refactor qledgend handling...
r855 }
Michal Klocek
Refactor themes...
r143
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Refactors layout managment...
r1534
Miikka Heikkinen
Add Polar chart support...
r2483 AbstractChartLayout *ChartPresenter::layout()
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Refactors axis animation, line animations
r1241 {
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r1534 return m_layout;
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Refactors axis animation, line animations
r1241 }
Jani Honkonen
src folder: another massive victory for coding style police
r2131 QLegend *ChartPresenter::legend()
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Refactors layout managment...
r1534 {
return m_chart->legend();
}
Michal Klocek
Refactors layout...
r1965 void ChartPresenter::setVisible(bool visible)
{
m_chart->setVisible(visible);
}
Jani Honkonen
src folder: another massive victory for coding style police
r2131 ChartBackground *ChartPresenter::backgroundElement()
Michal Klocek
Refactors layout...
r1965 {
return m_background;
}
Miikka Heikkinen
Add API to specify plot area background....
r2498 QAbstractGraphicsShapeItem *ChartPresenter::plotAreaElement()
{
return m_plotAreaBackground;
}
Miikka Heikkinen
Add Polar chart support...
r2483 QList<ChartAxisElement *> ChartPresenter::axisItems() const
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Refactors layout managment...
r1534 {
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r2273 return m_axisItems;
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r1534 }
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Refactors internals...
r2273 QList<ChartItem *> ChartPresenter::chartItems() const
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r2105 {
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Refactors internals...
r2273 return m_chartItems;
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Refactors layout:...
r2105 }
Jani Honkonen
src folder: another massive victory for coding style police
r2131 ChartTitle *ChartPresenter::titleElement()
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r1534 {
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r1965 return m_title;
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Refactors axis animation, line animations
r1241 }
Miikka Heikkinen
Added HTML support for various text items...
r2539 QRectF ChartPresenter::textBoundingRect(const QFont &font, const QString &text, qreal angle)
{
if (!dummyTextItem)
dummyTextItem = new QGraphicsTextItem;
dummyTextItem->setFont(font);
dummyTextItem->setHtml(text);
QRectF boundingRect = dummyTextItem->boundingRect();
// Take rotation into account
if (angle) {
QTransform transform;
transform.rotate(angle);
boundingRect = transform.mapRect(boundingRect);
}
return boundingRect;
}
// boundingRect parameter returns the rotated bounding rect of the text
QString ChartPresenter::truncatedText(const QFont &font, const QString &text, qreal angle,
qreal maxSize, Qt::Orientation constraintOrientation,
QRectF &boundingRect)
{
QString truncatedString(text);
boundingRect = textBoundingRect(font, truncatedString, angle);
qreal checkDimension = ((constraintOrientation == Qt::Horizontal)
? boundingRect.width() : boundingRect.height());
if (checkDimension > maxSize) {
Miikka Heikkinen
Optimize string truncation algorithm...
r2541 // It can be assumed that almost any amount of string manipulation is faster
// than calculating one bounding rectangle, so first prepare a list of truncated strings
// to try.
if (!truncateMatcher)
truncateMatcher = new QRegExp(truncateMatchString);
QVector<QString> testStrings(text.length());
int count(0);
static QLatin1Char closeTag('>');
static QLatin1Char openTag('<');
static QLatin1Char semiColon(';');
static QLatin1String ellipsis("...");
while (truncatedString.length() > 1) {
int chopIndex(-1);
int chopCount(1);
QChar lastChar(truncatedString.at(truncatedString.length() - 1));
if (lastChar == closeTag)
chopIndex = truncatedString.lastIndexOf(openTag);
else if (lastChar == semiColon)
chopIndex = truncateMatcher->indexIn(truncatedString, 0);
if (chopIndex != -1)
chopCount = truncatedString.length() - chopIndex;
truncatedString.chop(chopCount);
testStrings[count] = truncatedString + ellipsis;
count++;
}
Miikka Heikkinen
Added HTML support for various text items...
r2539
Miikka Heikkinen
Optimize string truncation algorithm...
r2541 // Binary search for best fit
int minIndex(0);
int maxIndex(count - 1);
int bestIndex(count);
QRectF checkRect;
while (maxIndex >= minIndex) {
int mid = (maxIndex + minIndex) / 2;
checkRect = textBoundingRect(font, testStrings.at(mid), angle);
Miikka Heikkinen
Added HTML support for various text items...
r2539 checkDimension = ((constraintOrientation == Qt::Horizontal)
Miikka Heikkinen
Optimize string truncation algorithm...
r2541 ? checkRect.width() : checkRect.height());
if (checkDimension > maxSize) {
// Checked index too large, all under this are also too large
minIndex = mid + 1;
} else {
// Checked index fits, all over this also fit
maxIndex = mid - 1;
bestIndex = mid;
boundingRect = checkRect;
}
}
// Default to "..." if nothing fits
if (bestIndex == count) {
boundingRect = textBoundingRect(font, ellipsis, angle);
truncatedString = ellipsis;
} else {
truncatedString = testStrings.at(bestIndex);
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Added HTML support for various text items...
r2539 }
}
return truncatedString;
}
Michal Klocek
Refactors qchart , adds line animation...
r131 #include "moc_chartpresenter_p.cpp"
QTCOMMERCIALCHART_END_NAMESPACE