chartdatetimeaxisx.cpp
168 lines
| 5.2 KiB
| text/x-c
|
CppLexer
Marek Rosa
|
r1717 | /**************************************************************************** | ||
| ** | ||||
| ** 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 "chartdatetimeaxisx_p.h" | ||||
| #include "chartpresenter_p.h" | ||||
| #include "qdatetimeaxis.h" | ||||
| #include <QGraphicsLayout> | ||||
| #include <QDateTime> | ||||
Michal Klocek
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r1735 | #include <QFontMetrics> | ||
| #include <qmath.h> | ||||
|
Marek Rosa
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r1717 | |||
| static int label_padding = 5; | ||||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
Jani Honkonen
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r2097 | ChartDateTimeAxisX::ChartDateTimeAxisX(QAbstractAxis *axis, ChartPresenter *presenter) | ||
| : ChartAxis(axis, presenter), | ||||
| m_tickCount(0) | ||||
|
Marek Rosa
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r1717 | { | ||
| } | ||||
| ChartDateTimeAxisX::~ChartDateTimeAxisX() | ||||
| { | ||||
| } | ||||
|
Jani Honkonen
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r2097 | void ChartDateTimeAxisX::createLabels(QStringList &labels, qreal min, qreal max, int ticks) | ||
|
Marek Rosa
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r1717 | { | ||
|
Jani Honkonen
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r2097 | Q_ASSERT(max > min); | ||
| Q_ASSERT(ticks > 1); | ||||
|
Marek Rosa
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r1717 | |||
| QDateTimeAxis *axis = qobject_cast<QDateTimeAxis *>(m_chartAxis); | ||||
|
Jani Honkonen
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r2097 | int n = qMax(int(-floor(log10((max - min) / (ticks - 1)))), 0); | ||
|
Marek Rosa
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r1717 | n++; | ||
|
Jani Honkonen
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r2097 | for (int i = 0; i < ticks; i++) { | ||
| qreal value = min + (i * (max - min) / (ticks - 1)); | ||||
|
Marek Rosa
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r1801 | labels << QDateTime::fromMSecsSinceEpoch(value).toString(axis->format()); | ||
|
Marek Rosa
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r1717 | } | ||
| } | ||||
| QVector<qreal> ChartDateTimeAxisX::calculateLayout() const | ||||
| { | ||||
|
Jani Honkonen
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r2097 | Q_ASSERT(m_tickCount >= 2); | ||
|
Marek Rosa
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r1717 | |||
| QVector<qreal> points; | ||||
| points.resize(m_tickCount); | ||||
|
Michal Klocek
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r1965 | QRectF rect = presenter()->chartsGeometry(); | ||
|
Jani Honkonen
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r2097 | const qreal deltaX = rect.width() / (m_tickCount - 1); | ||
|
Marek Rosa
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r1717 | for (int i = 0; i < m_tickCount; ++i) { | ||
|
Michal Klocek
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r1965 | int x = i * deltaX + rect.left(); | ||
|
Marek Rosa
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r1717 | points[i] = x; | ||
| } | ||||
| return points; | ||||
| } | ||||
| void ChartDateTimeAxisX::updateGeometry() | ||||
| { | ||||
| const QVector<qreal>& layout = ChartAxis::layout(); | ||||
|
Jani Honkonen
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r2097 | if (layout.isEmpty()) | ||
| return; | ||||
|
Marek Rosa
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r1717 | |||
| QStringList ticksList; | ||||
|
Jani Honkonen
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r2097 | createLabels(ticksList, m_min, m_max, layout.size()); | ||
|
Marek Rosa
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r1717 | |||
| QList<QGraphicsItem *> lines = m_grid->childItems(); | ||||
| QList<QGraphicsItem *> labels = m_labels->childItems(); | ||||
| QList<QGraphicsItem *> shades = m_shades->childItems(); | ||||
|
Michal Klocek
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r1729 | QList<QGraphicsItem *> axis = m_arrow->childItems(); | ||
|
Marek Rosa
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r1717 | |||
| Q_ASSERT(labels.size() == ticksList.size()); | ||||
| Q_ASSERT(layout.size() == ticksList.size()); | ||||
|
Michal Klocek
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r1965 | QRectF chartRect = presenter()->chartsGeometry(); | ||
|
Jani Honkonen
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r2104 | QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem *>(axis.at(0)); | ||
|
Michal Klocek
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r1965 | lineItem->setLine(chartRect.left(), chartRect.bottom(), chartRect.right(), chartRect.bottom()); | ||
|
Marek Rosa
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r1717 | |||
| qreal width = 0; | ||||
| for (int i = 0; i < layout.size(); ++i) { | ||||
|
Jani Honkonen
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r2104 | QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem *>(lines.at(i)); | ||
|
Michal Klocek
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r1965 | lineItem->setLine(layout[i], chartRect.top(), layout[i], chartRect.bottom()); | ||
|
Jani Honkonen
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r2104 | QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem *>(labels.at(i)); | ||
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Jani Honkonen
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r2097 | labelItem->setText(ticksList.at(i)); | ||
|
Jani Honkonen
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r2104 | const QRectF &rect = labelItem->boundingRect(); | ||
|
Jani Honkonen
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r2097 | QPointF center = rect.center(); | ||
| labelItem->setTransformOriginPoint(center.x(), center.y()); | ||||
| labelItem->setPos(layout[i] - center.x(), chartRect.bottom() + label_padding); | ||||
| if (labelItem->pos().x() <= width) { | ||||
| labelItem->setVisible(false); | ||||
| lineItem->setVisible(false); | ||||
| } else { | ||||
| labelItem->setVisible(true); | ||||
| lineItem->setVisible(true); | ||||
| width = rect.width() + labelItem->pos().x(); | ||||
|
Marek Rosa
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r1717 | } | ||
|
Jani Honkonen
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r2097 | |||
| if ((i + 1) % 2 && i > 1) { | ||||
|
Jani Honkonen
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r2104 | QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem *>(shades.at(i / 2 - 1)); | ||
|
Jani Honkonen
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r2097 | rectItem->setRect(layout[i - 1], chartRect.top(), layout[i] - layout[i - 1], chartRect.height()); | ||
| } | ||||
|
Jani Honkonen
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r2104 | lineItem = static_cast<QGraphicsLineItem *>(axis.at(i + 1)); | ||
|
Jani Honkonen
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r2097 | lineItem->setLine(layout[i], chartRect.bottom(), layout[i], chartRect.bottom() + 5); | ||
|
Marek Rosa
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r1717 | } | ||
| } | ||||
| void ChartDateTimeAxisX::handleAxisUpdated() | ||||
| { | ||||
| //TODO:: fix this | ||||
|
Jani Honkonen
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r2104 | QDateTimeAxis *axis = qobject_cast<QDateTimeAxis *>(m_chartAxis); | ||
|
Marek Rosa
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r1801 | m_tickCount = axis->tickCount(); | ||
|
Marek Rosa
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r1717 | ChartAxis::handleAxisUpdated(); | ||
| } | ||||
|
Jani Honkonen
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r2104 | QSizeF ChartDateTimeAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||
|
Michal Klocek
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r1965 | { | ||
| Q_UNUSED(constraint) | ||||
| QFontMetrics fn(m_font); | ||||
| QSizeF sh; | ||||
|
Jani Honkonen
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r2097 | switch (which) { | ||
| case Qt::MinimumSize: | ||||
| sh = QSizeF(fn.boundingRect("...").width(), fn.height()); | ||||
| break; | ||||
| case Qt::PreferredSize: { | ||||
| const QVector<qreal>& layout = ChartAxis::layout(); | ||||
| if (layout.isEmpty()) | ||||
|
Michal Klocek
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r1965 | break; | ||
|
Jani Honkonen
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r2097 | QStringList ticksList; | ||
| qreal width = 0; | ||||
| qreal height = 0; | ||||
| for (int i = 0; i < ticksList.size(); ++i) { | ||||
| QRectF rect = fn.boundingRect(ticksList.at(i)); | ||||
| width += rect.width(); | ||||
| height += qMax(rect.height() + label_padding, height); | ||||
|
Michal Klocek
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r1965 | } | ||
|
Jani Honkonen
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r2097 | sh = QSizeF(width, height); | ||
| break; | ||||
|
Jani Honkonen
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r2104 | } | ||
|
Jani Honkonen
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r2097 | default: | ||
| break; | ||||
| } | ||||
|
Michal Klocek
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r1965 | |||
|
Jani Honkonen
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r2097 | return sh; | ||
|
Michal Klocek
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r1965 | } | ||
|
Marek Rosa
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r1717 | QTCOMMERCIALCHART_END_NAMESPACE | ||