chartvalueaxisy.cpp
116 lines
| 3.1 KiB
| text/x-c
|
CppLexer
Marek Rosa
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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 | ||||
| ** $QT_END_LICENSE$ | ||||
| ** | ||||
| ****************************************************************************/ | ||||
|
Marek Rosa
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r1805 | #include "chartvalueaxisy_p.h" | ||
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r1555 | #include "qabstractaxis.h" | ||
| #include "chartpresenter_p.h" | ||||
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r1805 | #include "qvalueaxis.h" | ||
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r2106 | #include "chartlayout_p.h" | ||
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r1555 | #include <QGraphicsLayout> | ||
| #include <QFontMetrics> | ||||
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r1735 | #include <qmath.h> | ||
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r1555 | |||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
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r2111 | ChartValueAxisY::ChartValueAxisY(QValueAxis *axis,ChartPresenter *presenter) : VerticalAxis(axis,presenter), | ||
| m_tickCount(0),m_axis(axis) | ||||
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r1555 | { | ||
| } | ||||
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r1805 | ChartValueAxisY::~ChartValueAxisY() | ||
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r1555 | { | ||
| } | ||||
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r1805 | QVector<qreal> ChartValueAxisY::calculateLayout() const | ||
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r1555 | { | ||
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r2105 | Q_ASSERT(m_tickCount>=2); | ||
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r1555 | |||
| QVector<qreal> points; | ||||
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r1698 | points.resize(m_tickCount); | ||
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r1555 | |||
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r2111 | const QRectF& gridRect = gridGeometry(); | ||
| const qreal deltaY = gridRect.height()/(m_tickCount-1); | ||||
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r1698 | for (int i = 0; i < m_tickCount; ++i) { | ||
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r2111 | int y = i * -deltaY + gridRect.bottom(); | ||
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r1561 | points[i] = y; | ||
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r1555 | } | ||
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r1561 | |||
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r1555 | return points; | ||
| } | ||||
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r1805 | void ChartValueAxisY::updateGeometry() | ||
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r1555 | { | ||
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r1561 | const QVector<qreal> &layout = ChartAxis::layout(); | ||
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r2105 | if(layout.isEmpty()) return; | ||
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r2111 | setLabels(createValueLabels(layout.size())); | ||
| VerticalAxis::updateGeometry(); | ||||
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r1555 | } | ||
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r1805 | void ChartValueAxisY::handleAxisUpdated() | ||
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r1698 | { | ||
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r2111 | if (m_tickCount != m_axis->tickCount()) { | ||
| m_tickCount = m_axis->tickCount(); | ||||
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r2106 | presenter()->layout()->invalidate(); | ||
| } | ||||
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r1698 | ChartAxis::handleAxisUpdated(); | ||
| } | ||||
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r2105 | QSizeF ChartValueAxisY::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; | ||
| QSizeF base = ChartAxis::sizeHint(which, constraint); | ||||
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r2111 | QStringList ticksList = createValueLabels(m_tickCount); | ||
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r2105 | qreal width=0; | ||
| qreal height=0; | ||||
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r1965 | |||
| switch (which) { | ||||
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r2093 | case Qt::MinimumSize: { | ||
| int count = qMax(ticksList.first().count() , ticksList.last().count()); | ||||
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r2105 | width=fn.averageCharWidth()*count+labelPadding(); | ||
| height=fn.height(); | ||||
| height=qMax(height,base.height()); | ||||
| width+=base.width(); | ||||
| sh = QSizeF(width,height); | ||||
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r2093 | break; | ||
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r2105 | } | ||
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r2093 | case Qt::PreferredSize: | ||
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r2105 | { | ||
| for (int i = 0; i < ticksList.size(); ++i) | ||||
| { | ||||
| width=qMax(qreal(fn.averageCharWidth()*ticksList.at(i).count())+labelPadding(),width); | ||||
| height+=fn.height(); | ||||
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r1965 | } | ||
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r2105 | height=qMax(height,base.height()); | ||
| width+=base.width(); | ||||
| sh = QSizeF(width,height); | ||||
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r2093 | break; | ||
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r2105 | } | ||
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r2093 | default: | ||
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r1965 | break; | ||
| } | ||||
| return sh; | ||||
| } | ||||
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r1698 | |||
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r1555 | QTCOMMERCIALCHART_END_NAMESPACE | ||