chartdatetimeaxisy.cpp
175 lines
| 5.3 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 "chartdatetimeaxisy_p.h" | ||||
| #include "chartpresenter_p.h" | ||||
| #include "qdatetimeaxis.h" | ||||
| #include <QGraphicsLayout> | ||||
| #include <QFontMetrics> | ||||
| #include <QDateTime> | ||||
Michal Klocek
|
r1735 | #include <qmath.h> | ||
|
Marek Rosa
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r1717 | |||
| static int label_padding = 5; | ||||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
| ChartDateTimeAxisY::ChartDateTimeAxisY(QAbstractAxis *axis,ChartPresenter *presenter) : ChartAxis(axis,presenter), | ||||
| m_tickCount(0) | ||||
| { | ||||
| } | ||||
| ChartDateTimeAxisY::~ChartDateTimeAxisY() | ||||
| { | ||||
| } | ||||
| void ChartDateTimeAxisY::createLabels(QStringList &labels,qreal min, qreal max, int ticks) | ||||
| { | ||||
| Q_ASSERT(max>min); | ||||
| Q_ASSERT(ticks>1); | ||||
| QDateTimeAxis *axis = qobject_cast<QDateTimeAxis *>(m_chartAxis); | ||||
| int n = qMax(int(-floor(log10((max-min)/(ticks-1)))),0); | ||||
| n++; | ||||
| 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> ChartDateTimeAxisY::calculateLayout() const | ||||
| { | ||||
| Q_ASSERT(m_tickCount>=2); | ||||
| QVector<qreal> points; | ||||
| points.resize(m_tickCount); | ||||
|
Michal Klocek
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r1965 | QRectF rect = presenter()->chartsGeometry(); | ||
| const qreal deltaY = rect.height()/(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 y = i * -deltaY + rect.bottom(); | ||
|
Marek Rosa
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r1717 | points[i] = y; | ||
| } | ||||
| return points; | ||||
| } | ||||
| void ChartDateTimeAxisY::updateGeometry() | ||||
| { | ||||
| const QVector<qreal> &layout = ChartAxis::layout(); | ||||
| if(layout.isEmpty()) return; | ||||
| QStringList ticksList; | ||||
| createLabels(ticksList,m_min,m_max,layout.size()); | ||||
| 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(); | ||
| qreal height = chartRect.bottom(); | ||||
|
Marek Rosa
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r1717 | |||
| QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(axis.at(0)); | ||||
|
Michal Klocek
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r1965 | lineItem->setLine(chartRect.left() , chartRect.top(), chartRect.left(), chartRect.bottom()); | ||
|
Marek Rosa
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r1717 | |||
| for (int i = 0; i < layout.size(); ++i) { | ||||
| QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(lines.at(i)); | ||||
|
Michal Klocek
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r1965 | lineItem->setLine(chartRect.left() , layout[i], chartRect.right(), layout[i]); | ||
|
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r1717 | QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem*>(labels.at(i)); | ||
| labelItem->setText(ticksList.at(i)); | ||||
| const QRectF& rect = labelItem->boundingRect(); | ||||
| QPointF center = rect.center(); | ||||
| labelItem->setTransformOriginPoint(center.x(), center.y()); | ||||
|
Michal Klocek
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r1965 | labelItem->setPos(chartRect.left() - rect.width() - label_padding , layout[i]-center.y()); | ||
|
Marek Rosa
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r1717 | |||
| if(labelItem->pos().y()+rect.height()>height) { | ||||
| labelItem->setVisible(false); | ||||
| lineItem->setVisible(false); | ||||
| } | ||||
| else { | ||||
| labelItem->setVisible(true); | ||||
| lineItem->setVisible(true); | ||||
| height=labelItem->pos().y(); | ||||
| } | ||||
| if ((i+1)%2 && i>1) { | ||||
| QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem*>(shades.at(i/2-1)); | ||||
|
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r1965 | rectItem->setRect(chartRect.left(),layout[i],chartRect.width(),layout[i-1]-layout[i]); | ||
|
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r1717 | } | ||
| lineItem = static_cast<QGraphicsLineItem*>(axis.at(i+1)); | ||||
|
Michal Klocek
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r1965 | lineItem->setLine(chartRect.left()-5,layout[i],chartRect.left(),layout[i]); | ||
|
Marek Rosa
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r1717 | } | ||
| } | ||||
| void ChartDateTimeAxisY::handleAxisUpdated() | ||||
| { | ||||
| //TODO:: fix this | ||||
| 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(); | ||
| } | ||||
|
Michal Klocek
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r1965 | QSizeF ChartDateTimeAxisY::sizeHint(Qt::SizeHint which, const QSizeF& constraint) const | ||
| { | ||||
| Q_UNUSED(constraint) | ||||
| QFontMetrics fn(m_font); | ||||
| QSizeF sh; | ||||
| 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()) break; | ||||
| 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); | ||||
| } | ||||
| sh = QSizeF(width,height); | ||||
| break; | ||||
| } | ||||
| default: | ||||
| break; | ||||
| } | ||||
| return sh; | ||||
| } | ||||
|
Marek Rosa
|
r1717 | |||
| QTCOMMERCIALCHART_END_NAMESPACE | ||||