156 lines
2.9 KiB
C++
156 lines
2.9 KiB
C++
#include "qt/graphics/QtGraphicsView.h"
|
|
|
|
#include <QPropertyAnimation>
|
|
#include <QScrollBar>
|
|
#include <QMouseEvent>
|
|
|
|
QtGraphicsView::QtGraphicsView(QWidget* parent)
|
|
: QGraphicsView(parent)
|
|
, m_zoomFactor(1.0f)
|
|
, m_appZoomFactor(1.0f)
|
|
{
|
|
setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
|
|
}
|
|
|
|
float QtGraphicsView::getZoomFactor() const
|
|
{
|
|
return m_appZoomFactor;
|
|
}
|
|
|
|
void QtGraphicsView::setAppZoomFactor(float appZoomFactor)
|
|
{
|
|
m_appZoomFactor = appZoomFactor;
|
|
updateTransform();
|
|
}
|
|
|
|
qreal QtGraphicsView::zoom() const
|
|
{
|
|
return m_zoomFactor;
|
|
}
|
|
|
|
void QtGraphicsView::setZoom(qreal zoom)
|
|
{
|
|
m_zoomFactor = qBound(0.1, zoom, 100.0);
|
|
updateTransform();
|
|
}
|
|
|
|
void QtGraphicsView::mousePressEvent(QMouseEvent *event)
|
|
{
|
|
if (event->button() == Qt::LeftButton && !itemAt(event->pos()))
|
|
{
|
|
m_last = event->pos();
|
|
}
|
|
|
|
QGraphicsView::mousePressEvent(event);
|
|
}
|
|
|
|
void QtGraphicsView::mouseReleaseEvent(QMouseEvent *event)
|
|
{
|
|
if (event->button() == Qt::LeftButton && !itemAt(event->pos()) && event->pos() == m_last)
|
|
{
|
|
emit emptySpaceClicked();
|
|
}
|
|
|
|
QGraphicsView::mouseReleaseEvent(event);
|
|
viewport()->setCursor(Qt::ArrowCursor);
|
|
}
|
|
|
|
void QtGraphicsView::keyPressEvent(QKeyEvent* event)
|
|
{
|
|
float delta = 150;
|
|
float x = 0.0f;
|
|
float y = 0.0f;
|
|
|
|
if (event->key() == Qt::Key_W)
|
|
{
|
|
if (event->modifiers() == Qt::ShiftModifier)
|
|
{
|
|
updateZoom(200.0f, true);
|
|
return;
|
|
}
|
|
|
|
y -= delta;
|
|
}
|
|
else if (event->key() == Qt::Key_A)
|
|
{
|
|
x -= delta;
|
|
}
|
|
else if (event->key() == Qt::Key_S)
|
|
{
|
|
if (event->modifiers() == Qt::ShiftModifier)
|
|
{
|
|
updateZoom(-200.0f, true);
|
|
return;
|
|
}
|
|
|
|
y += delta;
|
|
}
|
|
else if (event->key() == Qt::Key_D)
|
|
{
|
|
x += delta;
|
|
}
|
|
else
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (x != 0)
|
|
{
|
|
QPropertyAnimation* anim = new QPropertyAnimation(horizontalScrollBar(), "value");
|
|
anim->setDuration(100);
|
|
anim->setStartValue(horizontalScrollBar()->value());
|
|
anim->setEndValue(horizontalScrollBar()->value() + x);
|
|
anim->start();
|
|
}
|
|
if (y != 0)
|
|
{
|
|
QPropertyAnimation* anim = new QPropertyAnimation(verticalScrollBar(), "value");
|
|
anim->setDuration(100);
|
|
anim->setStartValue(verticalScrollBar()->value());
|
|
anim->setEndValue(verticalScrollBar()->value() + y);
|
|
anim->start();
|
|
}
|
|
}
|
|
|
|
void QtGraphicsView::wheelEvent(QWheelEvent* event)
|
|
{
|
|
if (event->modifiers() == Qt::ShiftModifier && event->delta() != 0.0f)
|
|
{
|
|
updateZoom(event->delta(), false);
|
|
return;
|
|
}
|
|
|
|
QGraphicsView::wheelEvent(event);
|
|
}
|
|
|
|
void QtGraphicsView::updateTransform()
|
|
{
|
|
float zoomFactor = m_appZoomFactor * m_zoomFactor;
|
|
setTransform(QTransform(zoomFactor, 0, 0, zoomFactor, 0, 0));
|
|
}
|
|
|
|
void QtGraphicsView::updateZoom(float delta, bool animate)
|
|
{
|
|
float factor = 1.0f + 0.001 * delta;
|
|
|
|
if (factor <= 0.0f)
|
|
{
|
|
factor = 0.000001;
|
|
}
|
|
|
|
float newZoom = m_zoomFactor * factor;
|
|
|
|
if (animate)
|
|
{
|
|
QPropertyAnimation* anim = new QPropertyAnimation(this, "zoom");
|
|
anim->setDuration(100);
|
|
anim->setStartValue(m_zoomFactor);
|
|
anim->setEndValue(newZoom);
|
|
anim->start();
|
|
}
|
|
else
|
|
{
|
|
setZoom(newZoom);
|
|
}
|
|
}
|