我想相对于 VisualizationViewer 自动更新卫星视图并启用采摘支持。
我终于采用了另一种解决方案:不自动更新卫星视图,而是使用鼠标按钮 2 进行平移,并使用 CTRL+Mouse_Wheel 进行缩放。
这是课程,它可能会有所帮助......:
public class SatelliteVisualizationViewerMouseControler implements
MouseListener, MouseMotionListener, MouseWheelListener {
private SatelliteVisualizationViewer<SVertex, PEdge> vv;
private Point drag_point;
private double zoom_factor = 0.1;
public SatelliteVisualizationViewerMouseControler(
SatelliteVisualizationViewer<SVertex, PEdge> vv) {
this.vv = vv;
}
@Override
public void mouseDragged(MouseEvent e) {
if (drag_point != null) {
Point2D l_drag_point = vv.getRenderContext()
.getMultiLayerTransformer()
.inverseTransform(Layer.LAYOUT, drag_point);
Point2D l_e_point = vv.getRenderContext()
.getMultiLayerTransformer()
.inverseTransform(Layer.LAYOUT, e.getPoint());
double delta_x = l_e_point.getX() - l_drag_point.getX();
double delta_y = l_e_point.getY() - l_drag_point.getY();
double scale = vv.getRenderContext().getMultiLayerTransformer()
.getTransformer(Layer.VIEW).getScale();
vv.getRenderContext().getMultiLayerTransformer()
.getTransformer(Layer.LAYOUT)
.translate(delta_x * (1 / scale), delta_y * (1 / scale));
drag_point = e.getPoint();
}
}
@Override
public void mouseMoved(MouseEvent e) {
}
@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
@Override
public void mousePressed(MouseEvent e) {
if (e.getButton() == MouseEvent.BUTTON2) {
drag_point = e.getPoint();
}
}
@Override
public void mouseReleased(MouseEvent e) {
if (e.getButton() == MouseEvent.BUTTON2) {
drag_point = null;
}
}
@Override
public void mouseWheelMoved(MouseWheelEvent e) {
if (e.getModifiersEx() == MouseEvent.CTRL_DOWN_MASK) {
vv.getRenderContext()
.getMultiLayerTransformer()
.getTransformer(Layer.LAYOUT)
.scale(1 + (e.getWheelRotation() * zoom_factor),
1 + (e.getWheelRotation() * zoom_factor),
vv.getCenter());
}
}
}