content: /*
   * Copyright (C) 2008 The Android Open Source Project
   *
   * 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 android.widget;
  
  import android.annotation.UnsupportedAppUsage;
  import android.annotation.Widget;
  import android.content.Context;
  import android.util.AttributeSet;
  import android.view.LayoutInflater;
  import android.view.MotionEvent;
  import android.view.View;
  import android.view.animation.AlphaAnimation;
  
  import com.android.internal.R;
  
  
  /**
   * The {@code ZoomControls} class displays a simple set of controls used for zooming and
   * provides callbacks to register for events.
   * @deprecated This functionality and UI is better handled with custom views and layouts
   * rather than a dedicated zoom-control widget
   */
  @Deprecated
  @Widget
  public class ZoomControls extends LinearLayout {
  
      @UnsupportedAppUsage
      private final ZoomButton mZoomIn;
      @UnsupportedAppUsage
      private final ZoomButton mZoomOut;
          
      public ZoomControls(Context context) {
          this(context, null);
      }
  
      public ZoomControls(Context context, AttributeSet attrs) {
          super(context, attrs);
          setFocusable(false);
          
          LayoutInflater inflater = (LayoutInflater) context
                  .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
          inflater.inflate(R.layout.zoom_controls, this, // we are the parent
                  true);
          
          mZoomIn = (ZoomButton) findViewById(R.id.zoomIn);
          mZoomOut = (ZoomButton) findViewById(R.id.zoomOut);
      }
  
      public void setOnZoomInClickListener(OnClickListener listener) {
          mZoomIn.setOnClickListener(listener);
      }
      
      public void setOnZoomOutClickListener(OnClickListener listener) {
          mZoomOut.setOnClickListener(listener);
      }
      
      /*
       * Sets how fast you get zoom events when the user holds down the
       * zoom in/out buttons.
       */
      public void setZoomSpeed(long speed) {
          mZoomIn.setZoomSpeed(speed);
          mZoomOut.setZoomSpeed(speed);
      }
      
      @Override
      public boolean onTouchEvent(MotionEvent event) {
          
          /* Consume all touch events so they don't get dispatched to the view
           * beneath this view.
           */
          return true;
      }
      
      public void show() {
          fade(View.VISIBLE, 0.0f, 1.0f);
      }
      
      public void hide() {
          fade(View.GONE, 1.0f, 0.0f);
      }
      
      private void fade(int visibility, float startAlpha, float endAlpha) {
          AlphaAnimation anim = new AlphaAnimation(startAlpha, endAlpha);
          anim.setDuration(500);
          startAnimation(anim);
          setVisibility(visibility);
      }
      
      public void setIsZoomInEnabled(boolean isEnabled) {
          mZoomIn.setEnabled(isEnabled);
      }
      
      public void setIsZoomOutEnabled(boolean isEnabled) {
          mZoomOut.setEnabled(isEnabled);
      }
      
      @Override
      public boolean hasFocus() {
          return mZoomIn.hasFocus() || mZoomOut.hasFocus();
      }
  
      @Override
      public CharSequence getAccessibilityClassName() {
          return ZoomControls.class.getName();
      }
  }
  