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Add docs for nice number algorithm
Add docs for nice number algorithm
Michal Klocek - - Load All Authors

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r2273:1c49aa901cb2
r2325:d7155d151d73
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chartdatetimeaxisx.cpp
120 lines | 3.3 KiB | text/x-c | CppLexer
/ src / axis / datetimeaxis / chartdatetimeaxisx.cpp
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Marek Rosa
Added QDateTimeAxis
 r1717 /****************************************************************************
**
** 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 "chartdatetimeaxisx_p.h"
#include "chartpresenter_p.h"
#include "qdatetimeaxis.h"
Michal Klocek
Adds sizeHints for datetimeaxis
 r2137 #include "chartlayout_p.h"
Marek Rosa
Added QDateTimeAxis
 r1717 #include <QGraphicsLayout>
#include <QDateTime>
Michal Klocek
Refactor animator...
 r1735 #include <QFontMetrics>
#include <qmath.h>
Marek Rosa
Added QDateTimeAxis
 r1717 QTCOMMERCIALCHART_BEGIN_NAMESPACE
Michal Klocek
Refactors internals...
 r2273 ChartDateTimeAxisX::ChartDateTimeAxisX(QDateTimeAxis *axis, QGraphicsItem* item)
: HorizontalAxis(axis, item),
Jani Honkonen
src folder: another massive victory for coding style police
 r2131 m_axis(axis)
Marek Rosa
Added QDateTimeAxis
 r1717 {
Michal Klocek
Refactors internals...
 r2273 QObject::connect(m_axis,SIGNAL(tickCountChanged(int)),this, SLOT(handleTickCountChanged(int)));
Marek Rosa
Added QDateTimeAxis
 r1717 }
ChartDateTimeAxisX::~ChartDateTimeAxisX()
{
}
QVector<qreal> ChartDateTimeAxisX::calculateLayout() const
{
Michal Klocek
Refactors internals...
 r2273 int tickCount = m_axis->tickCount();
Q_ASSERT(tickCount >= 2);
Marek Rosa
Added QDateTimeAxis
 r1717
QVector<qreal> points;
Michal Klocek
Refactors internals...
 r2273 points.resize(tickCount);
Jani Honkonen
src folder: another massive victory for coding style police
 r2131 const QRectF &gridRect = gridGeometry();
Michal Klocek
Refactors internals...
 r2273 const qreal deltaX = gridRect.width() / (tickCount - 1);
for (int i = 0; i < tickCount; ++i) {
Michal Klocek
Refactors axis updateGeometry handling...
 r2111 int x = i * deltaX + gridRect.left();
Marek Rosa
Added QDateTimeAxis
 r1717 points[i] = x;
}
return points;
}
void ChartDateTimeAxisX::updateGeometry()
{
const QVector<qreal>& layout = ChartAxis::layout();
Jani Honkonen
src folder: another massive victory for coding style police
 r2131 if (layout.isEmpty())
return;
Michal Klocek
Refactors internals...
 r2273 setLabels(createDateTimeLabels(min(),max(), layout.size(),m_axis->format()));
Michal Klocek
Refactors axis updateGeometry handling...
 r2111 HorizontalAxis::updateGeometry();
Marek Rosa
Added QDateTimeAxis
 r1717 }
Michal Klocek
Refactors internals...
 r2273 void ChartDateTimeAxisX::handleTickCountChanged(int tick)
Marek Rosa
Added QDateTimeAxis
 r1717 {
Michal Klocek
Refactors internals...
 r2273 Q_UNUSED(tick)
if(presenter()) presenter()->layout()->invalidate();
Marek Rosa
Added QDateTimeAxis
 r1717 }
Jani Honkonen
src folder: another massive victory for coding style police
 r2131 QSizeF ChartDateTimeAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
Michal Klocek
Refactors layout...
 r1965 {
Q_UNUSED(constraint)
Michal Klocek
Refactors axis updateGeometry handling...
 r2111 QFontMetrics fn(font());
Michal Klocek
Refactors layout...
 r1965 QSizeF sh;
Michal Klocek
Adds sizeHints for datetimeaxis
 r2137 QSizeF base = HorizontalAxis::sizeHint(which, constraint);
Michal Klocek
Refactors internals...
 r2273 QStringList ticksList = createDateTimeLabels(min(),max(),m_axis->tickCount(),m_axis->format());
Michal Klocek
Adds sizeHints for datetimeaxis
 r2137 qreal width = 0;
qreal height = 0;
Michal Klocek
Refactors internals...
 r2273 if(ticksList.empty()){
return sh;
}
Michal Klocek
Adds sizeHints for datetimeaxis
 r2137
Jani Honkonen
src folder: another massive victory for coding style police
 r2131 switch (which) {
Michal Klocek
Adds sizeHints for datetimeaxis
 r2137 case Qt::MinimumSize:{
int count = qMax(ticksList.last().count(),ticksList.first().count());
width = fn.averageCharWidth() * count;
height = fn.height() + labelPadding();
width = qMax(width,base.width());
height += base.height();
sh = QSizeF(width,height);
Jani Honkonen
src folder: another massive victory for coding style police
 r2131 break;
Michal Klocek
Adds sizeHints for datetimeaxis
 r2137 }
Jani Honkonen
src folder: another massive victory for coding style police
 r2131 case Qt::PreferredSize: {
Michal Klocek
Adds sizeHints for datetimeaxis
 r2137 int count = qMax(ticksList.last().count(),ticksList.first().count());
width=fn.averageCharWidth() * count;
height=fn.height()+labelPadding();
width=qMax(width,base.width());
height+=base.height();
sh = QSizeF(width,height);
Jani Honkonen
src folder: another massive victory for coding style police
 r2131 break;
}
default:
break;
}
Michal Klocek
Refactors layout...
 r1965
Jani Honkonen
src folder: another massive victory for coding style police
 r2131 return sh;
Michal Klocek
Refactors layout...
 r1965 }
Michal Klocek
Refactors internals...
 r2273 #include "moc_chartdatetimeaxisx_p.cpp"
Marek Rosa
Added QDateTimeAxis
 r1717 QTCOMMERCIALCHART_END_NAMESPACE