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Fix multi-line axis titles....
Fix multi-line axis titles. Since QFontMetrics doesn't support getting bounding rects for multi-line strings, we use a dummy graphicsitem instead. Task-number: QTRD-2057 Change-Id: Id6e6a27a00977d295e6f1bce070b08df21c2a666 Reviewed-by: Mika Salmela <mika.salmela@digia.com>
Miikka Heikkinen - - Load All Authors

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r2483:f494279b6366
r2530:5f790ea7fbdd
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chartlogvalueaxisy.cpp
141 lines | 4.5 KiB | text/x-c | CppLexer
/ src / axis / logvalueaxis / chartlogvalueaxisy.cpp
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Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 /****************************************************************************
**
Miikka Heikkinen
Fixed the copyright year 2012 -> 2013
 r2432 ** Copyright (C) 2013 Digia Plc
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 ** 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 "chartlogvalueaxisy_p.h"
#include "chartpresenter_p.h"
#include "qlogvalueaxis.h"
Miikka Heikkinen
Add Polar chart support...
 r2483 #include "abstractchartlayout_p.h"
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 #include <QGraphicsLayout>
#include <QFontMetrics>
#include <qmath.h>
Marek Rosa
QLogValueAxis number of labels calculation fixed
 r2370 #include <QDebug>
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274
QTCOMMERCIALCHART_BEGIN_NAMESPACE
Miikka Heikkinen
Add Polar chart support...
 r2483 ChartLogValueAxisY::ChartLogValueAxisY(QLogValueAxis *axis, QGraphicsItem *item)
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 : VerticalAxis(axis, item),
m_axis(axis)
{
Miikka Heikkinen
Add Polar chart support...
 r2483 QObject::connect(m_axis, SIGNAL(baseChanged(qreal)), this, SLOT(handleBaseChanged(qreal)));
QObject::connect(m_axis, SIGNAL(labelFormatChanged(QString)), this, SLOT(handleLabelFormatChanged(QString)));
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 }
ChartLogValueAxisY::~ChartLogValueAxisY()
{
}
QVector<qreal> ChartLogValueAxisY::calculateLayout() const
{
QVector<qreal> points;
qreal logMax = log10(m_axis->max()) / log10(m_axis->base());
qreal logMin = log10(m_axis->min()) / log10(m_axis->base());
Marek Rosa
Domains added
 r2275 qreal leftEdge = logMin < logMax ? logMin : logMax;
qreal ceilEdge = ceil(leftEdge);
Marek Rosa
QSplineSeries calculateControlPoints moved to splinechartitem. This way we don't need to deal with controlPoints on logaritmic scale
 r2372 int tickCount = qAbs(ceil(logMax) - ceil(logMin));
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274
points.resize(tickCount);
const QRectF &gridRect = gridGeometry();
const qreal deltaY = gridRect.height() / qAbs(logMax - logMin);
for (int i = 0; i < tickCount; ++i)
Miikka Heikkinen
Add Polar chart support...
 r2483 points[i] = (ceilEdge + qreal(i)) * -deltaY - leftEdge * -deltaY + gridRect.bottom();
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274
return points;
}
void ChartLogValueAxisY::updateGeometry()
{
Miikka Heikkinen
Add Polar chart support...
 r2483 const QVector<qreal> &layout = ChartAxisElement::layout();
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 if (layout.isEmpty())
return;
setLabels(createLogValueLabels(m_axis->min(), m_axis->max(), m_axis->base(), layout.size(), m_axis->labelFormat()));
VerticalAxis::updateGeometry();
}
Marek Rosa
Fixed: chart not redrawing when logaxis's logBase value changed
 r2322 void ChartLogValueAxisY::handleBaseChanged(qreal base)
{
Q_UNUSED(base);
Michal Klocek
Fixes missing layout updated on ticks,base and format calls
 r2333 QGraphicsLayoutItem::updateGeometry();
Marek Rosa
Fixed: chart not redrawing when logaxis's logBase value changed
 r2322 if(presenter()) presenter()->layout()->invalidate();
}
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274
Marek Rosa
Fixed: axis not redrawing when labelFormat changed
 r2323 void ChartLogValueAxisY::handleLabelFormatChanged(const QString &format)
{
Q_UNUSED(format);
Michal Klocek
Fixes missing layout updated on ticks,base and format calls
 r2333 QGraphicsLayoutItem::updateGeometry();
Marek Rosa
Fixed: axis not redrawing when labelFormat changed
 r2323 if(presenter()) presenter()->layout()->invalidate();
}
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 QSizeF ChartLogValueAxisY::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
Q_UNUSED(constraint)
Miikka Heikkinen
Add Polar chart support...
 r2483 QFontMetrics fn(axis()->labelsFont());
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 QSizeF sh;
QSizeF base = VerticalAxis::sizeHint(which, constraint);
QStringList ticksList;
qreal logMax = log10(m_axis->max()) / log10(m_axis->base());
qreal logMin = log10(m_axis->min()) / log10(m_axis->base());
Marek Rosa
QLogValueAxis number of labels calculation fixed
 r2370 int tickCount = qAbs(ceil(logMax) - ceil(logMin));
Miikka Heikkinen
Fix sizeHint for logvalue axes that have only single tick...
 r2460 if (m_axis->max() > m_axis->min() && tickCount > 0)
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 ticksList = createLogValueLabels(m_axis->min(), m_axis->max(), m_axis->base(), tickCount, m_axis->labelFormat());
else
ticksList.append(QString(" "));
qreal width = 0;
Miikka Heikkinen
Fix vanishing labels for first and last ticks....
 r2443 // Height of vertical axis sizeHint indicates the maximum distance labels can extend past
// first and last ticks. Base height is irrelevant.
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 qreal height = 0;
switch (which) {
case Qt::MinimumSize: {
Miikka Heikkinen
Fix axis sizehints when labels are angled...
 r2412 QRectF boundingRect = labelBoundingRect(fn, "...");
width = boundingRect.width() + labelPadding();
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 width += base.width();
Miikka Heikkinen
Fix vanishing labels for first and last ticks....
 r2443 height = boundingRect.height() / 2.0;
Miikka Heikkinen
Fix axis sizehints when labels are angled...
 r2412 sh = QSizeF(width, height);
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 break;
}
case Qt::PreferredSize: {
Miikka Heikkinen
Fix axis sizehints when labels are angled...
 r2412 int labelWidth = 0;
Miikka Heikkinen
Fix vanishing labels for first and last ticks....
 r2443 int firstHeight = -1;
Miikka Heikkinen
Fix axis sizehints when labels are angled...
 r2412 foreach (const QString& s, ticksList) {
QRect rect = labelBoundingRect(fn, s);
labelWidth = qMax(rect.width(), labelWidth);
Miikka Heikkinen
Fix vanishing labels for first and last ticks....
 r2443 height = rect.height();
if (firstHeight < 0)
firstHeight = height;
Miikka Heikkinen
Fix axis sizehints when labels are angled...
 r2412 }
Michal Klocek
Fix attempt to make logy axis label layout calculation correct
 r2390 width = labelWidth + labelPadding() + 2; //two pixels of tolerance
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 width += base.width();
Miikka Heikkinen
Fix vanishing labels for first and last ticks....
 r2443 height = qMax(height, qreal(firstHeight)) / 2.0;
Miikka Heikkinen
Fix axis sizehints when labels are angled...
 r2412 sh = QSizeF(width, height);
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 break;
}
default:
break;
}
return sh;
}
Marek Rosa
Fixed: chart not redrawing when logaxis's logBase value changed
 r2322 #include "moc_chartlogvalueaxisy_p.cpp"
Marek Rosa
QLogValueAxis added. Log domain missing
 r2274 QTCOMMERCIALCHART_END_NAMESPACE