I am creating a scalable shape by adding a shape and handles as separate views to a ViewGroup. Once a handler is clicked, how do I get a reference to the ViewGroup so that I can scale everything? handle.getParent() returns null. My ViewGroup was created programmatically.
public class ShapeView extends ViewGroup {
private SelectorView mSelectorView;
public ShapeView (Context context) {
super(context);
RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(200, 200);
this.setLayoutParams(p);
mSelectorView = new SelectorView(context);
this.addView(mSelectorView);
}
}
public class SelectorView extends View {
public RectangleDrawable mRectangleDrawable;
public SelectorView (Context context) {
super(context);
Log.v(TAG, "constructor");
mRectangleDrawable = new RectangleDrawable();
RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(20, 20);
this.setLayoutParams(p);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
mRectangleDrawable.draw(canvas);
}
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: {
ViewGroup parentView = (ViewGroup)this.getParent();
parentView.setX(100);
parentView.setY(100);
break;
}
}
return true;
}
}
Please use SelectorView.this.getParent() instead of this.getParent()
public class SelectorView extends View {
public RectangleDrawable mRectangleDrawable;
public SelectorView (Context context) {
super(context);
Log.v(TAG, "constructor");
mRectangleDrawable = new RectangleDrawable();
RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(20, 20);
this.setLayoutParams(p);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
mRectangleDrawable.draw(canvas);
}
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: {
ViewGroup parentView = (ViewGroup)SelectorView.this.getParent();
parentView.setX(100);
parentView.setY(100);
break;
}
}
return true;
}
}