chartwidget.cpp
63 lines
| 1.3 KiB
| text/x-c
|
CppLexer
|
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(); | ||||
|
r226 | zoomIn(rect); | ||
|
r67 | 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; | ||||
} | ||||
} | ||||