chartcategoryaxisx.cpp
119 lines
| 3.3 KiB
| text/x-c
|
CppLexer
Marek Rosa
|
r1701 | /**************************************************************************** | ||
| ** | ||||
| ** 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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r1817 | #include "chartcategoryaxisx_p.h" | ||
| #include "qcategoryaxis.h" | ||||
|
Marek Rosa
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r1701 | #include "qabstractaxis.h" | ||
| #include "chartpresenter_p.h" | ||||
| #include <QGraphicsLayout> | ||||
| #include <QFontMetrics> | ||||
Michal Klocek
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r1735 | #include <qmath.h> | ||
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r1701 | |||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
|
Michal Klocek
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r2273 | ChartCategoryAxisX::ChartCategoryAxisX(QCategoryAxis *axis, QGraphicsItem* item) | ||
| : HorizontalAxis(axis, item, true), | ||||
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r2131 | m_axis(axis) | ||
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r1701 | { | ||
| } | ||||
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r1817 | ChartCategoryAxisX::~ChartCategoryAxisX() | ||
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r1701 | { | ||
| } | ||||
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r1817 | QVector<qreal> ChartCategoryAxisX::calculateLayout() const | ||
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r1701 | { | ||
|
Michal Klocek
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r2111 | int tickCount = m_axis->categoriesLabels().count() + 1; | ||
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r1701 | QVector<qreal> points; | ||
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r1708 | |||
| if (tickCount < 2) | ||||
| return points; | ||||
|
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r2131 | const QRectF &gridRect = gridGeometry(); | ||
|
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r2136 | qreal range = max() - min(); | ||
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r1846 | if (range > 0) { | ||
| points.resize(tickCount); | ||||
|
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r2111 | qreal scale = gridRect.width() / range; | ||
|
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r2131 | for (int i = 0; i < tickCount; ++i) { | ||
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r1846 | if (i < tickCount - 1) { | ||
|
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r2136 | int x = (m_axis->startValue(m_axis->categoriesLabels().at(i)) - min()) * scale + gridRect.left(); | ||
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r1846 | points[i] = x; | ||
| } else { | ||||
|
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r2136 | int x = (m_axis->endValue(m_axis->categoriesLabels().at(i - 1)) - min()) * scale + gridRect.left(); | ||
|
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r1846 | points[i] = x; | ||
| } | ||||
|
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r2131 | } | ||
|
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r1846 | } | ||
|
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r2111 | |||
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r1701 | return points; | ||
| } | ||||
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r1817 | void ChartCategoryAxisX::updateGeometry() | ||
|
Michal Klocek
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r2407 | { | ||
| //TODO: this is not optimal when many categories :( , create only visible lables | ||||
|
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r2131 | setLabels(m_axis->categoriesLabels() << ""); | ||
|
Michal Klocek
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r2111 | HorizontalAxis::updateGeometry(); | ||
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r1701 | } | ||
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r1817 | void ChartCategoryAxisX::handleAxisUpdated() | ||
|
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r1777 | { | ||
| updateGeometry(); | ||||
|
Michal Klocek
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r2273 | //TODO :: ChartAxis::handleAxisUpdated(); | ||
|
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r1777 | } | ||
|
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r2131 | QSizeF ChartCategoryAxisX::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; | ||
|
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r2138 | QSizeF base = HorizontalAxis::sizeHint(which, constraint); | ||
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r2136 | QStringList ticksList = m_axis->categoriesLabels(); | ||
|
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r2131 | qreal width = 0; | ||
| qreal height = 0; | ||||
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r1965 | |||
| switch (which) { | ||||
|
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r2131 | case Qt::MinimumSize: | ||
|
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r1965 | width = fn.boundingRect("...").width(); | ||
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r2111 | height = fn.height() + labelPadding(); | ||
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r2131 | width = qMax(width, base.width()); | ||
| height += base.height(); | ||||
| sh = QSizeF(width, height); | ||||
|
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r1965 | break; | ||
|
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r2131 | case Qt::PreferredSize: { | ||
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r2105 | |||
|
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r2131 | for (int i = 0; i < ticksList.size(); ++i) { | ||
| QRectF rect = fn.boundingRect(ticksList.at(i)); | ||||
| width += rect.width(); | ||||
| height = qMax(rect.height() + labelPadding(), height); | ||||
|
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r1965 | } | ||
|
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r2131 | width = qMax(width, base.width()); | ||
| height += base.height(); | ||||
| sh = QSizeF(width, height); | ||||
| break; | ||||
| } | ||||
| default: | ||||
|
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r1965 | break; | ||
| } | ||||
| return sh; | ||||
| } | ||||
|
Marek Rosa
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r1701 | QTCOMMERCIALCHART_END_NAMESPACE | ||