gef connection 改变颜色

installEditPolicy(EditPolicy.SELECTION_FEEDBACK_ROLE, new SelectionEditPolicy());

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public class SelectionEditPolicy extends SelectionEditPolicy {

protected void hideSelection() {

BlockEditpart editpart = (BlockEditpart)getHost();

setConnectionVisible(editpart.getSourceConnections(),false,null);

setConnectionVisible(editpart.getTargetConnections(),false,null);

}

protected void showPrimarySelection() {

BlockEditpart editpart = (BlockEditpart)getHost();

editpart.refreshConnections();

setConnectionVisible(editpart.getSourceConnections(),true,ColorConstants.red);

setConnectionVisible(editpart.getTargetConnections(),true,ColorConstants.red);

}

protected void showSelection() {

BlockEditpart editpart = (BlockEditpart)getHost();

setConnectionVisible(editpart.getSourceConnections(),true,ColorConstants.green);

setConnectionVisible(editpart.getTargetConnections(),true,ColorConstants.green);

}

private void setConnectionVisible(List> Connections, boolean b, Color fg) {

for(Object o : Connections) {

if(o instanceof ConnectionEditPart) {

ConnectionEditPart cep = (ConnectionEditPart)o;

cep.setVisible(b,fg);

}