chartdatetimeaxisy.cpp
107 lines
| 2.8 KiB
| text/x-c
|
CppLexer
|
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" | ||||
#include <QGraphicsLayout> | ||||
#include <QFontMetrics> | ||||
#include <QDateTime> | ||||
|
r1735 | #include <qmath.h> | ||
|
r1717 | QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||
|
r2111 | ChartDateTimeAxisY::ChartDateTimeAxisY(QDateTimeAxis *axis,ChartPresenter *presenter) : VerticalAxis(axis,presenter), | ||
m_tickCount(0),m_axis(axis) | ||||
|
r1717 | { | ||
} | ||||
ChartDateTimeAxisY::~ChartDateTimeAxisY() | ||||
{ | ||||
} | ||||
QVector<qreal> ChartDateTimeAxisY::calculateLayout() const | ||||
{ | ||||
|
r2105 | Q_ASSERT(m_tickCount>=2); | ||
|
r1717 | |||
QVector<qreal> points; | ||||
points.resize(m_tickCount); | ||||
|
r2111 | const QRectF& gridRect = gridGeometry(); | ||
const qreal deltaY = gridRect.height()/(m_tickCount-1); | ||||
|
r1717 | for (int i = 0; i < m_tickCount; ++i) { | ||
|
r2111 | int y = i * -deltaY + gridRect.bottom(); | ||
|
r1717 | points[i] = y; | ||
} | ||||
return points; | ||||
} | ||||
void ChartDateTimeAxisY::updateGeometry() | ||||
{ | ||||
const QVector<qreal> &layout = ChartAxis::layout(); | ||||
|
r2105 | if(layout.isEmpty()) return; | ||
|
r2111 | setLabels(createDateTimeLabels(m_axis->format(),layout.size())); | ||
VerticalAxis::updateGeometry(); | ||||
|
r1717 | } | ||
void ChartDateTimeAxisY::handleAxisUpdated() | ||||
{ | ||||
|
r2111 | m_tickCount = m_axis->tickCount(); | ||
|
r1717 | ChartAxis::handleAxisUpdated(); | ||
} | ||||
|
r2105 | QSizeF ChartDateTimeAxisY::sizeHint(Qt::SizeHint which, const QSizeF& constraint) const | ||
|
r1965 | { | ||
Q_UNUSED(constraint) | ||||
|
r2111 | QFontMetrics fn(font()); | ||
|
r1965 | QSizeF sh; | ||
|
r2105 | switch (which) { | ||
case Qt::MinimumSize: | ||||
sh = QSizeF(fn.boundingRect("...").width(),fn.height()); | ||||
break; | ||||
case Qt::PreferredSize:{ | ||||
const QVector<qreal>& layout = ChartAxis::layout(); | ||||
if(layout.isEmpty()) break; | ||||
QStringList ticksList; | ||||
qreal width=0; | ||||
qreal height=0; | ||||
for (int i = 0; i < ticksList.size(); ++i) | ||||
{ | ||||
QRectF rect = fn.boundingRect(ticksList.at(i)); | ||||
width+=rect.width(); | ||||
|
r2112 | height+=qMax(rect.height()+labelPadding(),height); | ||
|
r2105 | } | ||
sh = QSizeF(width,height); | ||||
|
r1965 | break; | ||
|
r2097 | } | ||
|
r2105 | default: | ||
break; | ||||
} | ||||
|
r1965 | |||
|
r2105 | return sh; | ||
|
r1965 | } | ||
|
r1717 | |||
QTCOMMERCIALCHART_END_NAMESPACE | ||||