barchartitem.cpp
234 lines
| 6.7 KiB
| text/x-c
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CppLexer
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r794 | /**************************************************************************** | ||
** | ||||
** 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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r666 | #include "barchartitem_p.h" | ||
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r126 | #include "bar_p.h" | ||
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r820 | #include "barlabel_p.h" | ||
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r240 | #include "qbarset.h" | ||
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r338 | #include "qbarseries.h" | ||
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r487 | #include "qchart.h" | ||
#include "qchartaxis.h" | ||||
#include "qchartaxiscategories.h" | ||||
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r594 | #include "chartpresenter_p.h" | ||
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r671 | #include "chartanimator_p.h" | ||
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r679 | #include "chartdataset_p.h" | ||
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r288 | #include <QToolTip> | ||
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r839 | #include <QPainter> | ||
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r126 | |||
QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
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r677 | BarChartItem::BarChartItem(QBarSeries *series, ChartPresenter *presenter) : | ||
ChartItem(presenter), | ||||
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r763 | m_layoutSet(false), | ||
m_series(series) | ||||
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r126 | { | ||
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r737 | connect(series, SIGNAL(showToolTip(QPoint,QString)), this, SLOT(showToolTip(QPoint,QString))); | ||
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r681 | connect(series, SIGNAL(updatedBars()), this, SLOT(handleLayoutChanged())); | ||
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r671 | connect(series, SIGNAL(restructuredBar(int)), this, SLOT(handleModelChanged(int))); | ||
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r594 | setZValue(ChartPresenter::BarSeriesZValue); | ||
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r167 | dataChanged(); | ||
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r126 | } | ||
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r666 | BarChartItem::~BarChartItem() | ||
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r126 | { | ||
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r288 | disconnect(this,SLOT(showToolTip(QPoint,QString))); | ||
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r839 | deleteItems(); | ||
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r126 | } | ||
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r666 | void BarChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) | ||
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r126 | { | ||
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r763 | if (!m_layoutSet) { | ||
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r762 | qWarning() << "BarChartItem::paint called without layout set. Aborting."; | ||
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r126 | return; | ||
} | ||||
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r737 | |||
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r839 | painter->save(); | ||
painter->setClipRect(m_clipRect); | ||||
foreach (Bar *bar, m_bars) | ||||
bar->paint(painter,option,widget); | ||||
foreach (BarLabel* label, m_labels) | ||||
label->paint(painter,option,widget); | ||||
painter->restore(); | ||||
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r126 | } | ||
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r666 | QRectF BarChartItem::boundingRect() const | ||
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r126 | { | ||
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r839 | return m_rect.translated(-m_rect.topLeft()); | ||
// return m_rect; | ||||
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r126 | } | ||
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r165 | |||
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r666 | void BarChartItem::dataChanged() | ||
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r126 | { | ||
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r172 | // TODO: performance optimizations. Do we really need to delete and create items every time data is changed or can we reuse them? | ||
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r839 | deleteItems(); | ||
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r126 | |||
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r763 | m_bars.clear(); | ||
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r820 | m_labels.clear(); | ||
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r763 | m_layout.clear(); | ||
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r256 | |||
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r126 | // Create new graphic items for bars | ||
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r763 | for (int c = 0; c < m_series->categoryCount(); c++) { | ||
QString category = m_series->categoryName(c); | ||||
for (int s = 0; s < m_series->barsetCount(); s++) { | ||||
QBarSet *set = m_series->barsetAt(s); | ||||
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r839 | Bar *bar = new Bar(category,0); // Null parent is best :) | ||
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r763 | m_bars.append(bar); | ||
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r812 | connect(bar, SIGNAL(clicked(QString,Qt::MouseButtons)), set, SIGNAL(clicked(QString,Qt::MouseButtons))); | ||
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r737 | connect(bar, SIGNAL(hoverEntered(QPoint)), set, SLOT(barHoverEnterEvent(QPoint))); | ||
connect(bar, SIGNAL(hoverLeaved()), set, SLOT(barHoverLeaveEvent())); | ||||
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r763 | m_layout.append(QRectF(0, 0, 0, 0)); | ||
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r239 | } | ||
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r126 | } | ||
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r654 | |||
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r820 | // Create labels | ||
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r763 | for (int category = 0; category < m_series->categoryCount(); category++) { | ||
for (int s = 0; s < m_series->barsetCount(); s++) { | ||||
QBarSet *set = m_series->barsetAt(s); | ||||
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r839 | BarLabel *value = new BarLabel(*set, 0); | ||
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r820 | m_labels.append(value); | ||
connect(set,SIGNAL(labelsVisibleChanged(bool)),value,SLOT(labelsVisibleChanged(bool))); | ||||
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r263 | } | ||
} | ||||
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r126 | } | ||
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r810 | |||
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r681 | QVector<QRectF> BarChartItem::calculateLayout() | ||
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r671 | { | ||
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r681 | QVector<QRectF> layout; | ||
// Use temporary qreals for accurancy (we might get some compiler warnings... :) | ||||
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r763 | qreal categoryCount = m_series->categoryCount(); | ||
qreal setCount = m_series->barsetCount(); | ||||
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r681 | |||
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r682 | qreal width = geometry().width(); | ||
qreal height = geometry().height(); | ||||
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r763 | qreal max = m_series->max(); | ||
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r681 | |||
// Domain: | ||||
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r763 | if (m_domainMaxY > max) { | ||
max = m_domainMaxY; | ||||
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r681 | } | ||
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r737 | qreal scale = (height / max); | ||
qreal categoryWidth = width / categoryCount; | ||||
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r682 | qreal barWidth = categoryWidth / (setCount+1); | ||
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r681 | |||
int itemIndex(0); | ||||
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r737 | for (int category = 0; category < categoryCount; category++) { | ||
qreal xPos = categoryWidth * category + barWidth / 2; | ||||
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r682 | qreal yPos = height; | ||
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r681 | for (int set = 0; set < setCount; set++) { | ||
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r817 | QBarSet* barSet = m_series->barsetAt(set); | ||
qreal barHeight = barSet->valueAt(category) * scale; | ||||
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r763 | Bar* bar = m_bars.at(itemIndex); | ||
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r681 | |||
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r737 | QRectF rect(xPos, yPos - barHeight, barWidth, barHeight); | ||
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r681 | layout.append(rect); | ||
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r817 | bar->setPen(barSet->pen()); | ||
bar->setBrush(barSet->brush()); | ||||
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r681 | |||
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r820 | BarLabel* label = m_labels.at(itemIndex); | ||
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r681 | |||
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r817 | if (!qFuzzyIsNull(barSet->valueAt(category))) { | ||
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r820 | label->setText(QString::number(barSet->valueAt(category))); | ||
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r681 | } else { | ||
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r820 | label->setText(QString("")); | ||
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r681 | } | ||
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r820 | label->setPos(xPos + (rect.width()/2 - label->boundingRect().width()/2) | ||
,yPos - barHeight/2 - label->boundingRect().height()/2); | ||||
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r839 | label->setFont(barSet->labelFont()); | ||
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r811 | |||
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r681 | itemIndex++; | ||
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r682 | xPos += barWidth; | ||
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r681 | } | ||
} | ||||
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r671 | return layout; | ||
} | ||||
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r681 | void BarChartItem::applyLayout(const QVector<QRectF> &layout) | ||
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r671 | { | ||
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r679 | if (animator()) | ||
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r763 | animator()->updateLayout(this, m_layout, layout); | ||
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r671 | else | ||
setLayout(layout); | ||||
} | ||||
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r681 | void BarChartItem::setLayout(const QVector<QRectF> &layout) | ||
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r671 | { | ||
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r763 | m_layout = layout; | ||
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r681 | |||
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r763 | for (int i=0; i < m_bars.count(); i++) | ||
m_bars.at(i)->setRect(layout.at(i)); | ||||
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r681 | |||
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r671 | update(); | ||
} | ||||
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r666 | |||
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r839 | void BarChartItem::deleteItems() | ||
{ | ||||
foreach (Bar *bar, m_bars) | ||||
delete bar; | ||||
foreach (BarLabel* label, m_labels) | ||||
delete label; | ||||
} | ||||
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r139 | //handlers | ||
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r666 | void BarChartItem::handleModelChanged(int index) | ||
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r139 | { | ||
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r611 | Q_UNUSED(index) | ||
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r161 | dataChanged(); | ||
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r139 | } | ||
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r666 | void BarChartItem::handleDomainChanged(qreal minX, qreal maxX, qreal minY, qreal maxY) | ||
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r139 | { | ||
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r763 | m_domainMinX = minX; | ||
m_domainMaxX = maxX; | ||||
m_domainMinY = minY; | ||||
m_domainMaxY = maxY; | ||||
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r681 | handleLayoutChanged(); | ||
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r139 | } | ||
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r737 | void BarChartItem::handleGeometryChanged(const QRectF &rect) | ||
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r139 | { | ||
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r839 | m_clipRect = rect.translated(-rect.topLeft()); | ||
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r737 | m_rect = rect; | ||
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r682 | handleLayoutChanged(); | ||
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r763 | m_layoutSet = true; | ||
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r139 | setPos(rect.topLeft()); | ||
} | ||||
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r671 | void BarChartItem::handleLayoutChanged() | ||
{ | ||||
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r681 | QVector<QRectF> layout = calculateLayout(); | ||
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r671 | applyLayout(layout); | ||
update(); | ||||
} | ||||
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r666 | void BarChartItem::showToolTip(QPoint pos, QString tip) | ||
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r288 | { | ||
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r296 | // TODO: cool tooltip instead of default | ||
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r737 | QToolTip::showText(pos, tip); | ||
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r288 | } | ||
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r280 | |||
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r666 | #include "moc_barchartitem_p.cpp" | ||
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r139 | |||
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r126 | QTCOMMERCIALCHART_END_NAMESPACE | ||