##// END OF EJS Templates
Fix label angle setting for axis before axis is added to chart....
Fix label angle setting for axis before axis is added to chart. Since slots are obviously not connected before ChartAxis item is created, setting label angle before this is lost unless set in the constructor.

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r2354:ca92a163f6a4
r2410:47bf654423ee
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chartvalueaxisx.cpp
133 lines | 3.7 KiB | text/x-c | CppLexer
/****************************************************************************
**
** 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 "chartvalueaxisx_p.h"
#include "qabstractaxis.h"
#include "chartpresenter_p.h"
#include "qvalueaxis.h"
#include "chartlayout_p.h"
#include <QGraphicsLayout>
#include <QFontMetrics>
#include <qmath.h>
#include <QDebug>
QTCOMMERCIALCHART_BEGIN_NAMESPACE
ChartValueAxisX::ChartValueAxisX(QValueAxis *axis, QGraphicsItem* item )
: HorizontalAxis(axis, item),
m_axis(axis)
{
QObject::connect(m_axis,SIGNAL(tickCountChanged(int)),this, SLOT(handleTickCountChanged(int)));
QObject::connect(m_axis,SIGNAL(labelFormatChanged(QString)),this, SLOT(handleLabelFormatChanged(QString)));
}
ChartValueAxisX::~ChartValueAxisX()
{
}
QVector<qreal> ChartValueAxisX::calculateLayout() const
{
int tickCount = m_axis->tickCount();
Q_ASSERT(tickCount >= 2);
QVector<qreal> points;
points.resize(tickCount);
const QRectF &gridRect = gridGeometry();
const qreal deltaX = gridRect.width() / (tickCount - 1);
for (int i = 0; i < tickCount; ++i) {
points[i] = i * deltaX + gridRect.left();
}
return points;
}
void ChartValueAxisX::updateGeometry()
{
const QVector<qreal>& layout = ChartAxis::layout();
if (layout.isEmpty())
return;
setLabels(createValueLabels(min(),max(),layout.size(),m_axis->labelFormat()));
HorizontalAxis::updateGeometry();
}
void ChartValueAxisX::handleTickCountChanged(int tick)
{
Q_UNUSED(tick);
QGraphicsLayoutItem::updateGeometry();
if(presenter()) presenter()->layout()->invalidate();
}
void ChartValueAxisX::handleLabelFormatChanged(const QString &format)
{
Q_UNUSED(format);
QGraphicsLayoutItem::updateGeometry();
if(presenter()) presenter()->layout()->invalidate();
}
QSizeF ChartValueAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
Q_UNUSED(constraint)
QFontMetrics fn(font());
QSizeF sh;
QSizeF base = HorizontalAxis::sizeHint(which, constraint);
QStringList ticksList = createValueLabels(min(),max(),m_axis->tickCount(),m_axis->labelFormat());
qreal width = 0;
qreal height = 0;
switch (which) {
case Qt::MinimumSize: {
if(!ticksList.empty()) {
foreach(QString label,ticksList) {
width = qMax(qreal(fn.boundingRect(label).width()),width);
}
}
height = fn.height() + labelPadding();
width = qMax(width,base.width());
height += base.height();
sh = QSizeF(width,height);
break;
}
case Qt::PreferredSize: {
if(!ticksList.empty()) {
foreach(QString label,ticksList) {
width+=fn.boundingRect(label).width();
}
}
height=fn.height()+labelPadding();
width=qMax(width,base.width());
height+=base.height();
sh = QSizeF(width,height);
break;
}
default:
break;
}
return sh;
}
#include "moc_chartvalueaxisx_p.cpp"
QTCOMMERCIALCHART_END_NAMESPACE