axisitem.cpp
400 lines
| 9.9 KiB
| text/x-c
|
CppLexer
Michal Klocek
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r67 | #include "axisitem_p.h" | ||
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r140 | #include "qchartaxis.h" | ||
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r262 | #include "chartpresenter_p.h" | ||
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r530 | #include "chartanimator_p.h" | ||
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r67 | #include <QPainter> | ||
| #include <QDebug> | ||||
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r678 | #include <cmath> | ||
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r67 | |||
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r176 | static int label_padding = 5; | ||
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r85 | |||
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r67 | QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||
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r677 | Axis::Axis(QChartAxis* axis,ChartPresenter* presenter,AxisType type) : | ||
| Chart(presenter), | ||||
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r439 | m_chartAxis(axis), | ||
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r176 | m_type(type), | ||
| m_labelsAngle(0), | ||||
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r677 | m_grid(presenter->rootItem()), | ||
| m_shades(presenter->rootItem()), | ||||
| m_labels(presenter->rootItem()), | ||||
| m_axis(presenter->rootItem()), | ||||
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r502 | m_min(0), | ||
| m_max(0), | ||||
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r531 | m_ticksCount(0) | ||
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r67 | { | ||
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r145 | //initial initialization | ||
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r272 | m_axis.setZValue(ChartPresenter::AxisZValue); | ||
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r677 | m_axis.setHandlesChildEvents(false); | ||
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r262 | m_shades.setZValue(ChartPresenter::ShadesZValue); | ||
| m_grid.setZValue(ChartPresenter::GridZValue); | ||||
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r439 | |||
| QObject::connect(m_chartAxis,SIGNAL(updated()),this,SLOT(handleAxisUpdated())); | ||||
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r497 | QObject::connect(m_chartAxis->categories(),SIGNAL(updated()),this,SLOT(handleAxisCategoriesUpdated())); | ||
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r502 | |||
| handleAxisUpdated(); | ||||
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r67 | } | ||
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r677 | Axis::~Axis() | ||
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r67 | { | ||
| } | ||||
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r677 | void Axis::createItems(int count) | ||
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r176 | { | ||
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r530 | |||
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r291 | if(m_axis.children().size()==0) | ||
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r677 | m_axis.addToGroup(new AxisItem(this)); | ||
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r223 | for (int i = 0; i < count; ++i) { | ||
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r291 | m_grid.addToGroup(new QGraphicsLineItem()); | ||
| m_labels.addToGroup(new QGraphicsSimpleTextItem()); | ||||
| m_axis.addToGroup(new QGraphicsLineItem()); | ||||
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r530 | if((m_grid.childItems().size())%2 && m_grid.childItems().size()>2) m_shades.addToGroup(new QGraphicsRectItem()); | ||
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r176 | } | ||
| } | ||||
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r677 | void Axis::deleteItems(int count) | ||
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r176 | { | ||
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r291 | QList<QGraphicsItem *> lines = m_grid.childItems(); | ||
| QList<QGraphicsItem *> labels = m_labels.childItems(); | ||||
| QList<QGraphicsItem *> shades = m_shades.childItems(); | ||||
| QList<QGraphicsItem *> axis = m_axis.childItems(); | ||||
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r176 | |||
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r291 | for (int i = 0; i < count; ++i) { | ||
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r530 | if(lines.size()%2 && lines.size()>1) delete(shades.takeLast()); | ||
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r291 | delete(lines.takeLast()); | ||
| delete(labels.takeLast()); | ||||
| delete(axis.takeLast()); | ||||
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r272 | } | ||
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r176 | } | ||
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r677 | void Axis::updateLayout(QVector<qreal>& layout) | ||
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r176 | { | ||
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r677 | if(animator()){ | ||
| animator()->updateLayout(this,layout); | ||||
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r530 | } | ||
| else setLayout(layout); | ||||
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r85 | } | ||
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r176 | |||
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r677 | QStringList Axis::createLabels(int ticks, qreal min, qreal max) const | ||
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r85 | { | ||
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r439 | Q_ASSERT(max>=min); | ||
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r678 | Q_ASSERT(ticks>1); | ||
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r85 | |||
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r439 | QStringList labels; | ||
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r85 | |||
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r678 | int n = qMax(int(-floor(log10((max-min)/(ticks-1)))),0); | ||
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r497 | QChartAxisCategories* categories = m_chartAxis->categories(); | ||
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r291 | |||
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r502 | for(int i=0; i< ticks; i++) { | ||
| qreal value = min + (i * (max - min)/ (ticks-1)); | ||||
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r497 | if(categories->count()==0) { | ||
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r678 | labels << QString::number(value,'f',n); | ||
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r439 | } | ||
| else { | ||||
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r554 | |||
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r497 | QString label = categories->label(value); | ||
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r439 | labels << label; | ||
| } | ||||
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r223 | } | ||
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r439 | return labels; | ||
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r176 | } | ||
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r85 | |||
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r677 | void Axis::setAxisOpacity(qreal opacity) | ||
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r184 | { | ||
| m_axis.setOpacity(opacity); | ||||
| } | ||||
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r677 | qreal Axis::axisOpacity() const | ||
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r184 | { | ||
| return m_axis.opacity(); | ||||
| } | ||||
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r677 | void Axis::setGridOpacity(qreal opacity) | ||
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r176 | { | ||
| m_grid.setOpacity(opacity); | ||||
| } | ||||
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r85 | |||
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r677 | qreal Axis::gridOpacity() const | ||
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r176 | { | ||
| return m_grid.opacity(); | ||||
| } | ||||
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r85 | |||
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r677 | void Axis::setLabelsOpacity(qreal opacity) | ||
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r176 | { | ||
| m_labels.setOpacity(opacity); | ||||
| } | ||||
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r85 | |||
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r677 | qreal Axis::labelsOpacity() const | ||
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r176 | { | ||
| return m_labels.opacity(); | ||||
| } | ||||
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r85 | |||
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r677 | void Axis::setShadesOpacity(qreal opacity) | ||
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r176 | { | ||
| m_shades.setOpacity(opacity); | ||||
| } | ||||
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r85 | |||
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r677 | qreal Axis::shadesOpacity() const | ||
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r176 | { | ||
| return m_shades.opacity(); | ||||
| } | ||||
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r67 | |||
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r677 | void Axis::setLabelsAngle(int angle) | ||
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r176 | { | ||
| foreach(QGraphicsItem* item , m_labels.childItems()) { | ||||
| QPointF center = item->boundingRect().center(); | ||||
| item->setRotation(angle); | ||||
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r145 | } | ||
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r176 | |||
| m_labelsAngle=angle; | ||||
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r67 | } | ||
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r677 | void Axis::setLabelsPen(const QPen& pen) | ||
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r140 | { | ||
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r176 | foreach(QGraphicsItem* item , m_labels.childItems()) { | ||
| static_cast<QGraphicsSimpleTextItem*>(item)->setPen(pen); | ||||
| } | ||||
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r140 | } | ||
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r677 | void Axis::setLabelsBrush(const QBrush& brush) | ||
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r140 | { | ||
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r176 | foreach(QGraphicsItem* item , m_labels.childItems()) { | ||
| static_cast<QGraphicsSimpleTextItem*>(item)->setBrush(brush); | ||||
| } | ||||
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r140 | } | ||
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r677 | void Axis::setLabelsFont(const QFont& font) | ||
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r140 | { | ||
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r176 | foreach(QGraphicsItem* item , m_labels.childItems()) { | ||
| static_cast<QGraphicsSimpleTextItem*>(item)->setFont(font); | ||||
| } | ||||
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r140 | } | ||
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r677 | void Axis::setShadesBrush(const QBrush& brush) | ||
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r140 | { | ||
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r176 | foreach(QGraphicsItem* item , m_shades.childItems()) { | ||
| static_cast<QGraphicsRectItem*>(item)->setBrush(brush); | ||||
| } | ||||
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r140 | } | ||
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r677 | void Axis::setShadesPen(const QPen& pen) | ||
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r140 | { | ||
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r176 | foreach(QGraphicsItem* item , m_shades.childItems()) { | ||
| static_cast<QGraphicsRectItem*>(item)->setPen(pen); | ||||
| } | ||||
| } | ||||
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r677 | void Axis::setAxisPen(const QPen& pen) | ||
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r184 | { | ||
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r272 | foreach(QGraphicsItem* item , m_axis.childItems()) { | ||
| static_cast<QGraphicsLineItem*>(item)->setPen(pen); | ||||
| } | ||||
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r184 | } | ||
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r677 | void Axis::setGridPen(const QPen& pen) | ||
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r176 | { | ||
| foreach(QGraphicsItem* item , m_grid.childItems()) { | ||||
| static_cast<QGraphicsLineItem*>(item)->setPen(pen); | ||||
| } | ||||
| } | ||||
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r677 | QVector<qreal> Axis::calculateLayout() const | ||
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r291 | { | ||
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r502 | Q_ASSERT(m_ticksCount>=2); | ||
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r393 | QVector<qreal> points; | ||
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r502 | points.resize(m_ticksCount); | ||
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r393 | |||
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r291 | switch (m_type) | ||
| { | ||||
| case X_AXIS: | ||||
| { | ||||
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r502 | const qreal deltaX = m_rect.width()/(m_ticksCount-1); | ||
| for (int i = 0; i < m_ticksCount; ++i) { | ||||
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r291 | int x = i * deltaX + m_rect.left(); | ||
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r393 | points[i] = x; | ||
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r291 | } | ||
| } | ||||
| break; | ||||
| case Y_AXIS: | ||||
| { | ||||
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r502 | const qreal deltaY = m_rect.height()/(m_ticksCount-1); | ||
| for (int i = 0; i < m_ticksCount; ++i) { | ||||
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r291 | int y = i * -deltaY + m_rect.bottom(); | ||
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r393 | points[i] = y; | ||
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r291 | } | ||
| } | ||||
| break; | ||||
| } | ||||
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r393 | return points; | ||
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r291 | } | ||
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r677 | void Axis::setLayout(QVector<qreal>& layout) | ||
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r291 | { | ||
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r502 | int diff = m_layoutVector.size() - layout.size(); | ||
| if(diff>0) { | ||||
| deleteItems(diff); | ||||
| } | ||||
| else if(diff<0) { | ||||
| createItems(-diff); | ||||
| } | ||||
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r513 | if(diff!=0) handleAxisUpdated(); | ||
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r530 | QStringList ticksList = createLabels(layout.size(),m_min,m_max); | ||
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r513 | |||
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r502 | QList<QGraphicsItem *> lines = m_grid.childItems(); | ||
| QList<QGraphicsItem *> labels = m_labels.childItems(); | ||||
| QList<QGraphicsItem *> shades = m_shades.childItems(); | ||||
| QList<QGraphicsItem *> axis = m_axis.childItems(); | ||||
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r513 | Q_ASSERT(labels.size() == ticksList.size()); | ||
| Q_ASSERT(layout.size() == ticksList.size()); | ||||
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r502 | |||
| switch (m_type) | ||||
| { | ||||
| case X_AXIS: | ||||
| { | ||||
| QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(axis.at(0)); | ||||
| lineItem->setLine(m_rect.left(), m_rect.bottom(), m_rect.right(), m_rect.bottom()); | ||||
| for (int i = 0; i < layout.size(); ++i) { | ||||
| QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(lines.at(i)); | ||||
| lineItem->setLine(layout[i], m_rect.top(), layout[i], m_rect.bottom()); | ||||
| QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem*>(labels.at(i)); | ||||
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r513 | labelItem->setText(ticksList.at(i)); | ||
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r502 | QPointF center = labelItem->boundingRect().center(); | ||
| labelItem->setTransformOriginPoint(center.x(), center.y()); | ||||
| labelItem->setPos(layout[i] - center.x(), m_rect.bottom() + label_padding); | ||||
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r551 | if((i+1)%2 && i>1) { | ||
| QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem*>(shades.at(i/2-1)); | ||||
| rectItem->setRect(layout[i-1],m_rect.top(),layout[i]-layout[i-1],m_rect.height()); | ||||
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Michal Klocek
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r502 | } | ||
| lineItem = static_cast<QGraphicsLineItem*>(axis.at(i+1)); | ||||
| lineItem->setLine(layout[i],m_rect.bottom(),layout[i],m_rect.bottom()+5); | ||||
| } | ||||
| } | ||||
| break; | ||||
| case Y_AXIS: | ||||
| { | ||||
| QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(axis.at(0)); | ||||
| lineItem->setLine(m_rect.left() , m_rect.top(), m_rect.left(), m_rect.bottom()); | ||||
| for (int i = 0; i < layout.size(); ++i) { | ||||
| QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(lines.at(i)); | ||||
| lineItem->setLine(m_rect.left() , layout[i], m_rect.right(), layout[i]); | ||||
| QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem*>(labels.at(i)); | ||||
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r513 | labelItem->setText(ticksList.at(i)); | ||
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r502 | QPointF center = labelItem->boundingRect().center(); | ||
| labelItem->setTransformOriginPoint(center.x(), center.y()); | ||||
| labelItem->setPos(m_rect.left() - labelItem->boundingRect().width() - label_padding , layout[i]-center.y()); | ||||
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r551 | if((i+1)%2 && i>1) { | ||
| QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem*>(shades.at(i/2-1)); | ||||
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r578 | rectItem->setRect(m_rect.left(),layout[i],m_rect.width(),layout[i-1]-layout[i]); | ||
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r502 | } | ||
| lineItem = static_cast<QGraphicsLineItem*>(axis.at(i+1)); | ||||
| lineItem->setLine(m_rect.left()-5,layout[i],m_rect.left(),layout[i]); | ||||
| } | ||||
| } | ||||
| break; | ||||
| default: | ||||
| qDebug()<<"Unknown axis type"; | ||||
| break; | ||||
| } | ||||
| m_layoutVector=layout; | ||||
| } | ||||
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r291 | |||
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r677 | bool Axis::isEmpty() | ||
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r502 | { | ||
| return m_rect.isEmpty() || m_min==m_max || m_ticksCount==0; | ||||
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r291 | } | ||
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r140 | |||
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r439 | //handlers | ||
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r677 | void Axis::handleAxisCategoriesUpdated() | ||
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r497 | { | ||
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r502 | if(isEmpty()) return; | ||
| updateLayout(m_layoutVector); | ||||
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r497 | } | ||
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r677 | void Axis::handleAxisUpdated() | ||
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r439 | { | ||
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r497 | |||
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r452 | if(isEmpty()) return; | ||
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r439 | |||
| if(m_chartAxis->isAxisVisible()) { | ||||
| setAxisOpacity(100); | ||||
| } | ||||
| else { | ||||
| setAxisOpacity(0); | ||||
| } | ||||
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r535 | if(m_chartAxis->isGridLineVisible()) { | ||
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r439 | setGridOpacity(100); | ||
| } | ||||
| else { | ||||
| setGridOpacity(0); | ||||
| } | ||||
| if(m_chartAxis->labelsVisible()) | ||||
| { | ||||
| setLabelsOpacity(100); | ||||
| } | ||||
| else { | ||||
| setLabelsOpacity(0); | ||||
| } | ||||
| if(m_chartAxis->shadesVisible()) { | ||||
| setShadesOpacity(m_chartAxis->shadesOpacity()); | ||||
| } | ||||
| else { | ||||
| setShadesOpacity(0); | ||||
| } | ||||
| setLabelsAngle(m_chartAxis->labelsAngle()); | ||||
| setAxisPen(m_chartAxis->axisPen()); | ||||
| setLabelsPen(m_chartAxis->labelsPen()); | ||||
| setLabelsBrush(m_chartAxis->labelsBrush()); | ||||
| setLabelsFont(m_chartAxis->labelsFont()); | ||||
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r535 | setGridPen(m_chartAxis->gridLinePen()); | ||
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r439 | setShadesPen(m_chartAxis->shadesPen()); | ||
| setShadesBrush(m_chartAxis->shadesBrush()); | ||||
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r452 | |||
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r439 | } | ||
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r677 | void Axis::handleRangeChanged(qreal min, qreal max,int tickCount) | ||
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Michal Klocek
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r439 | { | ||
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r554 | if(min==max || tickCount<2) return; | ||
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r452 | m_min = min; | ||
| m_max = max; | ||||
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r554 | m_ticksCount= tickCount; | ||
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r513 | |||
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r452 | if(isEmpty()) return; | ||
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r502 | QVector<qreal> layout = calculateLayout(); | ||
| updateLayout(layout); | ||||
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r439 | |||
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r452 | } | ||
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r439 | |||
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r677 | void Axis::handleGeometryChanged(const QRectF& rect) | ||
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r439 | { | ||
| m_rect = rect; | ||||
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r452 | if(isEmpty()) return; | ||
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r502 | QVector<qreal> layout = calculateLayout(); | ||
| updateLayout(layout); | ||||
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r452 | } | ||
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r439 | |||
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r677 | void Axis::axisSelected() | ||
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r452 | { | ||
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r677 | qDebug()<<"TODO axis clicked"; | ||
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Michal Klocek
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r439 | } | ||
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Michal Klocek
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r67 | //TODO "nice numbers algorithm" | ||
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Michal Klocek
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r140 | #include "moc_axisitem_p.cpp" | ||
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Michal Klocek
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r67 | |||
| QTCOMMERCIALCHART_END_NAMESPACE | ||||