chartdatetimeaxisy.cpp
114 lines
| 3.2 KiB
| text/x-c
|
CppLexer
Marek Rosa
|
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 | ||
Jani Honkonen
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r2131 | ChartDateTimeAxisY::ChartDateTimeAxisY(QDateTimeAxis *axis, ChartPresenter *presenter) | ||
: VerticalAxis(axis, presenter), | ||||
m_tickCount(0), | ||||
m_axis(axis) | ||||
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r1717 | { | ||
} | ||||
ChartDateTimeAxisY::~ChartDateTimeAxisY() | ||||
{ | ||||
} | ||||
QVector<qreal> ChartDateTimeAxisY::calculateLayout() const | ||||
{ | ||||
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r2131 | Q_ASSERT(m_tickCount >= 2); | ||
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r1717 | |||
QVector<qreal> points; | ||||
points.resize(m_tickCount); | ||||
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r2131 | const QRectF &gridRect = gridGeometry(); | ||
const qreal deltaY = gridRect.height() / (m_tickCount - 1); | ||||
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r1717 | for (int i = 0; i < m_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; | ||||
setLabels(createDateTimeLabels(m_axis->format(), layout.size())); | ||||
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r2111 | VerticalAxis::updateGeometry(); | ||
Marek Rosa
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r1717 | } | ||
void ChartDateTimeAxisY::handleAxisUpdated() | ||||
{ | ||||
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r2137 | if (m_tickCount != m_axis->tickCount()) { | ||
m_tickCount = m_axis->tickCount(); | ||||
presenter()->layout()->invalidate(); | ||||
} | ||||
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r1717 | ChartAxis::handleAxisUpdated(); | ||
} | ||||
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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); | ||
QStringList ticksList = createDateTimeLabels(m_axis->format(),m_tickCount); | ||||
qreal width = 0; | ||||
qreal height = 0; | ||||
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r2105 | |||
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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: { | ||
int count = qMax(ticksList.first().count() , ticksList.last().count()); | ||||
width = count*fn.averageCharWidth() + labelPadding() + 2; //two pixels of tolerance | ||||
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 | } | ||
Marek Rosa
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r1717 | |||
QTCOMMERCIALCHART_END_NAMESPACE | ||||