chartdatetimeaxisy.cpp
135 lines
| 3.7 KiB
| text/x-c
|
CppLexer
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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 "chartdatetimeaxisy_p.h" | ||||
#include "chartpresenter_p.h" | ||||
#include "qdatetimeaxis.h" | ||||
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r2137 | #include "chartlayout_p.h" | ||
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r1717 | #include <QGraphicsLayout> | ||
#include <QFontMetrics> | ||||
#include <QDateTime> | ||||
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r1735 | #include <qmath.h> | ||
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r1717 | QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||
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r2273 | ChartDateTimeAxisY::ChartDateTimeAxisY(QDateTimeAxis *axis, QGraphicsItem* item) | ||
: VerticalAxis(axis, item), | ||||
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r2131 | m_axis(axis) | ||
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r1717 | { | ||
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r2273 | QObject::connect(m_axis,SIGNAL(tickCountChanged(int)),this, SLOT(handleTickCountChanged(int))); | ||
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r2326 | QObject::connect(m_axis,SIGNAL(formatChanged(QString)),this, SLOT(handleFormatChanged(QString))); | ||
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r1717 | } | ||
ChartDateTimeAxisY::~ChartDateTimeAxisY() | ||||
{ | ||||
} | ||||
QVector<qreal> ChartDateTimeAxisY::calculateLayout() const | ||||
{ | ||||
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r2273 | int tickCount = m_axis->tickCount(); | ||
Q_ASSERT(tickCount >= 2); | ||||
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r1717 | |||
QVector<qreal> points; | ||||
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r2273 | points.resize(tickCount); | ||
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r2131 | const QRectF &gridRect = gridGeometry(); | ||
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r2273 | const qreal deltaY = gridRect.height() / (tickCount - 1); | ||
for (int i = 0; i < tickCount; ++i) { | ||||
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r2111 | int y = i * -deltaY + gridRect.bottom(); | ||
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r1717 | points[i] = y; | ||
} | ||||
return points; | ||||
} | ||||
void ChartDateTimeAxisY::updateGeometry() | ||||
{ | ||||
const QVector<qreal> &layout = ChartAxis::layout(); | ||||
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r2131 | if (layout.isEmpty()) | ||
return; | ||||
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r2273 | setLabels(createDateTimeLabels(min(),max(), layout.size(),m_axis->format())); | ||
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r2111 | VerticalAxis::updateGeometry(); | ||
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r1717 | } | ||
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r2273 | void ChartDateTimeAxisY::handleTickCountChanged(int tick) | ||
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r1717 | { | ||
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r2273 | Q_UNUSED(tick) | ||
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r2334 | QGraphicsLayoutItem::updateGeometry(); | ||
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r2273 | if(presenter()) presenter()->layout()->invalidate(); | ||
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r1717 | } | ||
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r2326 | void ChartDateTimeAxisY::handleFormatChanged(const QString &format) | ||
{ | ||||
Q_UNUSED(format); | ||||
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r2334 | QGraphicsLayoutItem::updateGeometry(); | ||
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r2326 | if(presenter()) presenter()->layout()->invalidate(); | ||
} | ||||
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r2131 | QSizeF ChartDateTimeAxisY::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||
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r1965 | { | ||
Q_UNUSED(constraint) | ||||
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r2111 | QFontMetrics fn(font()); | ||
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r1965 | QSizeF sh; | ||
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r2137 | QSizeF base = VerticalAxis::sizeHint(which, constraint); | ||
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r2273 | QStringList ticksList = createDateTimeLabels(min(),max(),m_axis->tickCount(),m_axis->format()); | ||
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r2137 | qreal width = 0; | ||
qreal height = 0; | ||||
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r2105 | |||
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r2336 | |||
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r2273 | if(ticksList.empty()){ | ||
return sh; | ||||
} | ||||
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r2336 | int labelWidth = 0; | ||
foreach(const QString& s, ticksList) | ||||
{ | ||||
labelWidth=qMax(fn.width(s),labelWidth); | ||||
} | ||||
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r2137 | switch (which) { | ||
case Qt::MinimumSize: { | ||||
width = fn.boundingRect("...").width() + labelPadding(); | ||||
width += base.width(); | ||||
height = fn.height(); | ||||
height = qMax(height,base.height()); | ||||
sh = QSizeF(width,height); | ||||
break; | ||||
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r2097 | } | ||
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r2137 | case Qt::PreferredSize: { | ||
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r2336 | width = labelWidth + labelPadding() + 2; //two pixels of tolerance | ||
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r2137 | width += base.width(); | ||
height = fn.height() * ticksList.count(); | ||||
height = qMax(height,base.height()); | ||||
sh = QSizeF(width,height); | ||||
break; | ||||
} | ||||
default: | ||||
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r2131 | break; | ||
} | ||||
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r1965 | |||
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r2131 | return sh; | ||
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r1965 | } | ||
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r1717 | |||
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r2273 | #include "moc_chartdatetimeaxisy_p.cpp" | ||
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r1717 | QTCOMMERCIALCHART_END_NAMESPACE | ||