content: /*
   * Copyright (C) 2014 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 com.lb.launcher;
  
  import android.content.Context;
  import android.util.AttributeSet;
  import android.widget.Button;
  
  /**
   * A Button which becomes translucent when it is disabled
   */
  public class AlphaDisableableButton extends Button {
      public static float DISABLED_ALPHA_VALUE = 0.4f;
      public AlphaDisableableButton(Context context) {
          this(context, null);
      }
  
      public AlphaDisableableButton(Context context, AttributeSet attrs) {
          this(context, attrs, 0);
      }
  
      public AlphaDisableableButton(Context context, AttributeSet attrs, int defStyleAttr) {
          super(context, attrs, defStyleAttr);
          setLayerType(LAYER_TYPE_HARDWARE, null);
      }
  
      @Override
      public void setEnabled(boolean enabled) {
          super.setEnabled(enabled);
          if(enabled) {
              setAlpha(1.0f);
          } else {
              setAlpha(DISABLED_ALPHA_VALUE);
          }
      }
  }
  