Android Open Source - fab Action Button Outline Provider

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2015 Shell Software Inc./* w w w.  ja v a  2  s  .c  o  m*/
 *
 * 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.
 *
 * File created: 2015-02-25 19:54:28
 */

package com.software.shell.fab;

import android.annotation.TargetApi;
import android.graphics.Outline;
import android.os.Build;
import android.view.View;
import android.view.ViewOutlineProvider;

/**
 * An implementation of the {@link android.view.ViewOutlineProvider}
 * for <b>Action Button</b>
 * 
 * Used for drawing the elevation shadow for {@code API 21 Lollipop} and higher 
 *
 * @author Vladislav
 * @version 1.0.0
 * @since 1.0.0
 */
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
class ActionButtonOutlineProvider extends ViewOutlineProvider {
  
  /**
   * Outline provider width 
   */
  private int width;

  /**
   * Outline provider height
   */
  private int height;

  /**
   * Creates an instance of the {@link com.software.shell.fab.ActionButtonOutlineProvider}
   *  
   * @param width initial outline provider width
   * @param height initial outline provider height
   */
  ActionButtonOutlineProvider(int width, int height) {
    this.width = width;
    this.height = height;
  }

  /**
   * Called to get the provider to populate the Outline. This method will be called by a View 
   * when its owned Drawables are invalidated, when the View's size changes, or if invalidateOutline()
   * is called explicitly. The input outline is empty and has an alpha of 1.0f
   *
   * @param view a view, which builds the outline
   * @param outline an empty outline, which is to be populated
   */
  @Override
  public void getOutline(View view, Outline outline) {
    outline.setOval(0, 0, width, height);
  }
  
}

Java Source Code List

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