Examples with ComponentTargetFilter com.intellij.designer.designSurface.ComponentTargetFilter used on opensource projects

Example 1 with ComponentTargetFilter

use of com.intellij.designer.designSurface.ComponentTargetFilter in project intellij-community by JetBrains.

the class TreeDropListener method updateTargetUnderMouse.

private void updateTargetUnderMouse() {
    if (myContext.getComponents().isEmpty()) {
        return;
    }
    final List<RadComponent> excludeComponents = new ArrayList<>(myContext.getComponents());
    if (!myContext.isCreate()) {
        for (RadComponent component : myContext.getComponents()) {
            component.accept(new RadComponentVisitor() {

                @Override
                public void endVisit(RadComponent component) {
                    excludeComponents.add(component);
                }
            }, true);
        }
    }
    final EditOperation[] operation = new EditOperation[1];
    ComponentTargetFilter filter = new ComponentTargetFilter() {

        @Override
        public boolean preFilter(RadComponent component) {
            return myContext.isCreate() || !excludeComponents.contains(component);
        }

        @Override
        public boolean resultFilter(RadComponent target) {
            if (!myContext.isCreate()) {
                if (myContext.getComponents().get(0).getParent() == target) {
                    myContext.setType(OperationContext.MOVE);
                } else {
                    myContext.setType(OperationContext.ADD);
                }
            }
            if (myTarget == target) {
                return true;
            }
            RadLayout layout = target.getLayout();
            if (layout != null) {
                operation[0] = layout.processChildOperation(myContext);
            }
            return operation[0] != null;
        }
    };
    Point location = getLocation();
    RadComponent target = myArea.findTarget(location.x, location.y, filter);
    if (target != myTarget) {
        if (myTargetOperation != null) {
            eraseFeedback();
        }
        myTarget = target;
        myTargetOperation = operation[0];
    }
    if (target == null) {
        if (!myContext.isCreate()) {
            myContext.setType(null);
        }
    } else {
        myTargetOperation.setComponents(myContext.getComponents());
    }
}