chartbarcategoryaxisx.cpp
200 lines
| 6.2 KiB
| text/x-c
|
CppLexer
Marek Rosa
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r1555 | /**************************************************************************** | ||
Michal Klocek
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r1716 | ** | ||
| ** 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 | ||||
| ** $QT_END_LICENSE$ | ||||
| ** | ||||
| ****************************************************************************/ | ||||
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Marek Rosa
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r1555 | |||
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r1810 | #include "chartbarcategoryaxisx_p.h" | ||
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r1555 | #include "chartpresenter_p.h" | ||
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r1810 | #include "qbarcategoryaxis_p.h" | ||
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r1965 | #include <QFontMetrics> | ||
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r1720 | #include <QDebug> | ||
| #include <qmath.h> | ||||
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r1555 | |||
| static int label_padding = 5; | ||||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
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r1918 | ChartBarCategoryAxisX::ChartBarCategoryAxisX(QBarCategoryAxis *axis,ChartPresenter *presenter) : ChartAxis(axis,presenter), | ||
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r1716 | m_categoriesAxis(axis) | ||
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r1555 | { | ||
| } | ||||
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r1918 | ChartBarCategoryAxisX::~ChartBarCategoryAxisX() | ||
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r1570 | { | ||
| } | ||||
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r1918 | QVector<qreal> ChartBarCategoryAxisX::calculateLayout() const | ||
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r1555 | { | ||
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r1725 | int count = m_categoriesAxis->d_ptr->count(); | ||
| Q_ASSERT(count>=1); | ||||
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r1555 | |||
| QVector<qreal> points; | ||||
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r1725 | points.resize(count+2); | ||
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r1555 | |||
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r1965 | QRectF rect = presenter()->chartsGeometry(); | ||
| const qreal delta = rect.width()/(count); | ||||
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r1720 | qreal offset =-m_min-0.5; | ||
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r1837 | if(delta<1) return points; | ||
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r1720 | if(offset<=0) { | ||
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r1965 | offset = int(offset * rect.width()/(m_max - m_min))%int(delta) + delta; | ||
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r1716 | } | ||
| else { | ||||
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r1965 | offset = int(offset * rect.width()/(m_max - m_min))%int(delta); | ||
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r1716 | } | ||
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r1965 | points[0] = rect.left(); | ||
| points[count+1] = rect.right(); | ||||
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r1716 | |||
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r1725 | for (int i = 0; i < count; ++i) { | ||
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r1965 | qreal x = offset + i * delta + rect.left(); | ||
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r1720 | points[i+1] = x; | ||
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r1555 | } | ||
| return points; | ||||
| } | ||||
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r1918 | QStringList ChartBarCategoryAxisX::createCategoryLabels(const QVector<qreal>& layout) const | ||
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r1720 | { | ||
| QStringList result; | ||||
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r1965 | QRectF rect = presenter()->chartsGeometry(); | ||
| qreal d = (m_max - m_min)/rect.width(); | ||||
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r1720 | for (int i = 0;i < layout.count()-1; ++i) { | ||
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r1965 | qreal x = qFloor((((layout[i+1] + layout[i])/2-rect.left())*d + m_min+0.5)); | ||
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r1720 | if ((x < m_categoriesAxis->categories().count()) && (x >= 0)) { | ||
| result << m_categoriesAxis->categories().at(x); | ||||
| } | ||||
| else { | ||||
| // No label for x coordinate | ||||
| result << ""; | ||||
| } | ||||
| } | ||||
| result << ""; | ||||
| return result; | ||||
| } | ||||
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r1918 | void ChartBarCategoryAxisX::updateGeometry() | ||
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r1555 | { | ||
| const QVector<qreal>& layout = ChartAxis::layout(); | ||||
| if(layout.isEmpty()) return; | ||||
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r1720 | QStringList ticksList = createCategoryLabels(layout); | ||
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r1555 | |||
| QList<QGraphicsItem *> lines = m_grid->childItems(); | ||||
| QList<QGraphicsItem *> labels = m_labels->childItems(); | ||||
| QList<QGraphicsItem *> shades = m_shades->childItems(); | ||||
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r1729 | QList<QGraphicsItem *> axis = m_arrow->childItems(); | ||
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r1555 | |||
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r1716 | Q_ASSERT(labels.size() == ticksList.size()); | ||
| Q_ASSERT(layout.size() == ticksList.size()); | ||||
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r1965 | QRectF chartRect = presenter()->chartsGeometry(); | ||
| const qreal delta = chartRect.width()/(m_categoriesAxis->d_ptr->count()); | ||||
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r1555 | |||
| QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(axis.at(0)); | ||||
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r1965 | lineItem->setLine( chartRect.left(), chartRect.bottom(), chartRect.right(), chartRect.bottom()); | ||
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r1555 | |||
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r1965 | qreal width = chartRect.left(); | ||
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r1640 | for (int i = 0; i < layout.size(); ++i) { | ||
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r1555 | QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(lines.at(i)); | ||
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r1965 | lineItem->setLine(layout[i], chartRect.top(), layout[i], chartRect.bottom()); | ||
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r1640 | QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem*>(labels.at(i)); | ||
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r1716 | labelItem->setText(ticksList.at(i)); | ||
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r1570 | const QRectF& rect = labelItem->boundingRect(); | ||
| QPointF center = rect.center(); | ||||
| labelItem->setTransformOriginPoint(center.x(), center.y()); | ||||
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r1716 | |||
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r1720 | if(i==0){ | ||
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r1965 | labelItem->setPos(layout[i+1] - (delta)/2 - center.x(), chartRect.bottom() + label_padding); | ||
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r1640 | }else{ | ||
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r1965 | labelItem->setPos(layout[i] + (delta)/2 - center.x(), chartRect.bottom() + label_padding); | ||
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r1716 | } | ||
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r1965 | if(labelItem->pos().x()<=width || labelItem->pos().x()+ rect.width()> chartRect.right()) { | ||
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r1640 | labelItem->setVisible(false); | ||
| } | ||||
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r1716 | else { | ||
| labelItem->setVisible(true); | ||||
| width=rect.width()+labelItem->pos().x(); | ||||
| } | ||||
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r1555 | if ((i+1)%2 && i>1) { | ||
| QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem*>(shades.at(i/2-1)); | ||||
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r1965 | rectItem->setRect(layout[i-1], chartRect.top(),layout[i]-layout[i-1], chartRect.height()); | ||
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r1555 | } | ||
| lineItem = static_cast<QGraphicsLineItem*>(axis.at(i+1)); | ||||
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r1965 | lineItem->setLine(layout[i], chartRect.bottom(),layout[i], chartRect.bottom()+5); | ||
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r1555 | } | ||
| } | ||||
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r1918 | void ChartBarCategoryAxisX::handleAxisUpdated() | ||
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r1643 | { | ||
| if(m_categoriesAxis->categories()!=m_categories) | ||||
| { | ||||
| m_categories=m_categoriesAxis->categories(); | ||||
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r1725 | if(ChartAxis::layout().count()==m_categoriesAxis->d_ptr->count()+2) updateGeometry(); | ||
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r1643 | } | ||
| ChartAxis::handleAxisUpdated(); | ||||
| } | ||||
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r1965 | QSizeF ChartBarCategoryAxisX::sizeHint(Qt::SizeHint which, const QSizeF& constraint) const | ||
| { | ||||
| Q_UNUSED(constraint) | ||||
| QFontMetrics fn(m_font); | ||||
| QSizeF sh; | ||||
| QSizeF base = ChartAxis::sizeHint(which, constraint); | ||||
| QStringList ticksList = createCategoryLabels(ChartAxis::layout()); | ||||
| qreal width=0; | ||||
| qreal height=0; | ||||
| switch (which) { | ||||
| case Qt::MinimumSize: | ||||
| width = fn.boundingRect("...").width(); | ||||
| height = fn.height()+label_padding; | ||||
| width=qMax(width,base.width()); | ||||
| height+=base.height(); | ||||
| sh = QSizeF(width,height); | ||||
| break; | ||||
| case Qt::PreferredSize:{ | ||||
| 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); | ||||
| } | ||||
| width=qMax(width,base.width()); | ||||
| height+=base.height(); | ||||
| sh = QSizeF(width,height); | ||||
| break; | ||||
| } | ||||
| default: | ||||
| break; | ||||
| } | ||||
| return sh; | ||||
| } | ||||
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Marek Rosa
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r1555 | QTCOMMERCIALCHART_END_NAMESPACE | ||