chartvalueaxisx.cpp
133 lines
| 3.7 KiB
| text/x-c
|
CppLexer
|
r1555 | /**************************************************************************** | ||
** | ||||
** 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 | ||||
** $QT_END_LICENSE$ | ||||
** | ||||
****************************************************************************/ | ||||
|
r1805 | #include "chartvalueaxisx_p.h" | ||
|
r1555 | #include "qabstractaxis.h" | ||
#include "chartpresenter_p.h" | ||||
|
r1805 | #include "qvalueaxis.h" | ||
|
r2106 | #include "chartlayout_p.h" | ||
|
r1555 | #include <QGraphicsLayout> | ||
#include <QFontMetrics> | ||||
|
r1735 | #include <qmath.h> | ||
|
r2273 | #include <QDebug> | ||
|
r1555 | |||
|
r2106 | |||
|
r1555 | QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||
|
r2273 | ChartValueAxisX::ChartValueAxisX(QValueAxis *axis, QGraphicsItem* item ) | ||
: HorizontalAxis(axis, item), | ||||
m_axis(axis) | ||||
|
r1555 | { | ||
|
r2273 | QObject::connect(m_axis,SIGNAL(tickCountChanged(int)),this, SLOT(handleTickCountChanged(int))); | ||
|
r2323 | QObject::connect(m_axis,SIGNAL(labelFormatChanged(QString)),this, SLOT(handleLabelFormatChanged(QString))); | ||
|
r1555 | } | ||
|
r1805 | ChartValueAxisX::~ChartValueAxisX() | ||
|
r1555 | { | ||
} | ||||
|
r1805 | QVector<qreal> ChartValueAxisX::calculateLayout() const | ||
|
r1555 | { | ||
|
r2273 | int tickCount = m_axis->tickCount(); | ||
Q_ASSERT(tickCount >= 2); | ||||
|
r1555 | |||
QVector<qreal> points; | ||||
|
r2273 | points.resize(tickCount); | ||
|
r1555 | |||
|
r2131 | const QRectF &gridRect = gridGeometry(); | ||
|
r2273 | const qreal deltaX = gridRect.width() / (tickCount - 1); | ||
for (int i = 0; i < tickCount; ++i) { | ||||
|
r2144 | points[i] = i * deltaX + gridRect.left(); | ||
|
r1555 | } | ||
return points; | ||||
} | ||||
|
r1805 | void ChartValueAxisX::updateGeometry() | ||
|
r1555 | { | ||
const QVector<qreal>& layout = ChartAxis::layout(); | ||||
|
r2131 | if (layout.isEmpty()) | ||
return; | ||||
|
r2273 | setLabels(createValueLabels(min(),max(),layout.size(),m_axis->labelFormat())); | ||
|
r2111 | HorizontalAxis::updateGeometry(); | ||
|
r1555 | } | ||
|
r2273 | void ChartValueAxisX::handleTickCountChanged(int tick) | ||
|
r1698 | { | ||
|
r2273 | Q_UNUSED(tick); | ||
|
r2333 | QGraphicsLayoutItem::updateGeometry(); | ||
|
r2273 | if(presenter()) presenter()->layout()->invalidate(); | ||
|
r1698 | } | ||
|
r2323 | void ChartValueAxisX::handleLabelFormatChanged(const QString &format) | ||
{ | ||||
Q_UNUSED(format); | ||||
|
r2333 | QGraphicsLayoutItem::updateGeometry(); | ||
|
r2323 | if(presenter()) presenter()->layout()->invalidate(); | ||
} | ||||
|
r2131 | QSizeF ChartValueAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||
|
r1965 | { | ||
Q_UNUSED(constraint) | ||||
|
r2111 | QFontMetrics fn(font()); | ||
|
r1965 | QSizeF sh; | ||
|
r2138 | QSizeF base = HorizontalAxis::sizeHint(which, constraint); | ||
|
r2273 | QStringList ticksList = createValueLabels(min(),max(),m_axis->tickCount(),m_axis->labelFormat()); | ||
|
r2131 | qreal width = 0; | ||
qreal height = 0; | ||||
|
r1965 | |||
|
r2273 | |||
|
r2093 | switch (which) { | ||
|
r2353 | case Qt::MinimumSize: { | ||
if(!ticksList.empty()) { | ||||
|
r2354 | foreach(QString label,ticksList) { | ||
width = qMax(qreal(fn.boundingRect(label).width()),width); | ||||
} | ||||
|
r2353 | } | ||
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: | ||||
|
r2093 | break; | ||
} | ||||
|
r1965 | |||
|
r2093 | return sh; | ||
|
r1965 | } | ||
|
r2273 | #include "moc_chartvalueaxisx_p.cpp" | ||
|
r1555 | QTCOMMERCIALCHART_END_NAMESPACE | ||