content: /*
   * Copyright (C) 2014 Agens AS
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package no.agens.cassowarylayoutdemo;
  
  import android.app.Activity;
  import android.os.Bundle;
  import android.view.MotionEvent;
  import android.view.View;
  import android.widget.ScrollView;
  
  import no.agens.cassowarylayout.CassowaryLayout;
  import no.agens.cassowarylayout.Node;
  
  public class DynamicWidthActivity extends Activity {
  
      private double delta;
  
      private CassowaryLayout layout;
      private ScrollView scrollView;
  
      private static final String DRAGGER_POSITION = "draggerPosition";
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_dynamic_width);
  
          layout = (CassowaryLayout)findViewById(R.id.layout);
          scrollView = (ScrollView)findViewById(R.id.scroll_view);
  
          findViewById(R.id.dragger).setOnTouchListener(new View.OnTouchListener() {
              @Override
              public boolean onTouch(View v, MotionEvent event) {
                  final int X = (int) event.getRawX();
  
                  Node draggerNode = layout.getNodeById(v.getId());
  
                  switch (event.getAction() & MotionEvent.ACTION_MASK) {
                      case MotionEvent.ACTION_DOWN:
                          if (scrollView != null) {
                              scrollView.requestDisallowInterceptTouchEvent(true);
                          }
                          delta = X - draggerNode.getVariableValue(DRAGGER_POSITION);
                          break;
                      case MotionEvent.ACTION_UP:
                          if (scrollView != null) {
                              scrollView.requestDisallowInterceptTouchEvent(false);
                          }
  
                          break;
                      case MotionEvent.ACTION_POINTER_DOWN:
                          break;
                      case MotionEvent.ACTION_POINTER_UP:
                          break;
                      case MotionEvent.ACTION_MOVE:
                          draggerNode.setVariableToValue(DRAGGER_POSITION, X - delta);
                          layout.requestLayout();
                          break;
                  }
  
                  return true;
              }
          });
      }
  
  }
  