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jaguarview.cpp
85 lines (77 loc) · 2.06 KB
/
jaguarview.cpp
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#include "jaguarview.h"
JaguarView::JaguarView()
{
setResizeAnchor(QGraphicsView::AnchorViewCenter);
setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
m_scaleLineItem = new QGraphicsLineItem();
}
JaguarView::~JaguarView()
{
delete m_scaleLineItem;
}
void JaguarView::wheelEvent(QWheelEvent *event)
{
double scaleFactor = event->delta() > 0 ? 1.25 : 1/1.25;
scale(scaleFactor, scaleFactor);
}
void JaguarView::mousePressEvent(QMouseEvent *event)
{
QPoint pos;
switch(m_mode) {
case MODE_RULER:
pos = ((QPointF) mapToScene(event->pos())).toPoint();
ptMouseDown = pos;
scene()->addItem(m_scaleLineItem);
m_scaleLineItem->setLine(ptMouseDown.x(), ptMouseDown.y(), pos.x(), pos.y());
break;
default:
break;
}
return QGraphicsView::mousePressEvent(event);
}
void JaguarView::mouseReleaseEvent(QMouseEvent *event)
{
QPoint pos;
QVector2D v;
switch(m_mode) {
case MODE_RULER:
pos = ((QPointF) mapToScene(event->pos())).toPoint();
m_scaleLineItem->setLine(ptMouseDown.x(), ptMouseDown.y(), pos.x(), pos.y());
v = QVector2D(pos - ptMouseDown);
scene()->removeItem(m_scaleLineItem);
emit rulerDone(v.length());
break;
default:
break;
}
return QGraphicsView::mouseReleaseEvent(event);
}
void JaguarView::mouseMoveEvent(QMouseEvent *event)
{
switch(m_mode) {
case MODE_RULER:
if(m_scaleLineItem->isVisible()) {
QPoint pos = ((QPointF) mapToScene(event->pos())).toPoint();
m_scaleLineItem->setLine(ptMouseDown.x(), ptMouseDown.y(), pos.x(), pos.y());
}
break;
default:
break;
}
return QGraphicsView::mouseMoveEvent(event);
}
void JaguarView::setMode(Mode mode)
{
switch(mode){
case MODE_HAND:
setDragMode(QGraphicsView::ScrollHandDrag);
break;
case MODE_RULER:
setDragMode(QGraphicsView::NoDrag);
viewport()->setCursor(Qt::CrossCursor);
break;
default:
break;
}
m_mode = mode;
}