chartwidget.cpp
63 lines
| 1.3 KiB
| text/x-c
|
CppLexer
Michal Klocek
|
r67 | #include "chartwidget.h" | ||
| #include <QMouseEvent> | ||||
| ChartWidget::ChartWidget(QWidget *parent) | ||||
| : QChartView(parent), | ||||
| m_rubberBand(QRubberBand::Rectangle,this) | ||||
| { | ||||
| } | ||||
| void ChartWidget::mousePressEvent(QMouseEvent *event) | ||||
| { | ||||
| if(event->button()!=Qt::LeftButton) return; | ||||
| int margin = this->margin(); | ||||
| QRect rect(margin,margin,width()-2*margin,height()-2*margin); | ||||
| m_origin = event->pos(); | ||||
| if (!rect.contains(m_origin)) return; | ||||
| m_rubberBand.setGeometry(QRect(m_origin, QSize())); | ||||
| m_rubberBand.show(); | ||||
| event->accept(); | ||||
| } | ||||
| void ChartWidget::mouseMoveEvent(QMouseEvent *event) | ||||
| { | ||||
| if(m_rubberBand.isVisible()) | ||||
| m_rubberBand.setGeometry(QRect(m_origin, event->pos()).normalized()); | ||||
| } | ||||
| void ChartWidget::mouseReleaseEvent(QMouseEvent *event) | ||||
| { | ||||
| if( event->button()==Qt::LeftButton && m_rubberBand.isVisible()) { | ||||
| m_rubberBand.hide(); | ||||
| QRect rect = m_rubberBand.geometry(); | ||||
| zoomInToRect(rect); | ||||
| event->accept(); | ||||
| } | ||||
| if(event->button()==Qt::RightButton) { | ||||
| zoomOut(); | ||||
| } | ||||
| } | ||||
| void ChartWidget::keyPressEvent(QKeyEvent *event) | ||||
| { | ||||
| switch (event->key()) { | ||||
| case Qt::Key_Plus: | ||||
| zoomIn(); | ||||
| break; | ||||
| case Qt::Key_Minus: | ||||
| zoomOut(); | ||||
| break; | ||||
| default: | ||||
| QGraphicsView::keyPressEvent(event); | ||||
| break; | ||||
| } | ||||
| } | ||||