leakcanary-android/src/main/java/com/squareup/leakcanary/internal/MoreDetailsView.java

/*
 * Copyright (C) 2015 Square, Inc.
 *
 * 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.squareup.leakcanary.internal;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;

public final class MoreDetailsView extends View {

  private static final Paint iconPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

  static {
    iconPaint.setColor(LeakCanaryUi.ROOT_COLOR);
  }

  public MoreDetailsView(Context context, AttributeSet attrs) {
    super(context, attrs);

    float strokeSize = LeakCanaryUi.dpToPixel(2f, getResources());
    iconPaint.setStrokeWidth(strokeSize);
  }

  private boolean opened;

  @Override protected void onDraw(Canvas canvas) {
    int width = getWidth();
    int height = getHeight();
    int halfHeight = height / 2;
    int halfWidth = width / 2;

    if (opened) {
      canvas.drawLine(0, halfHeight, width, halfHeight, iconPaint);
    } else {
      canvas.drawLine(0, halfHeight, width, halfHeight, iconPaint);
      canvas.drawLine(halfWidth, 0, halfWidth, height, iconPaint);
    }
  }

  public void setOpened(boolean opened) {
    if (opened != this.opened) {
      this.opened = opened;
      invalidate();
    }
  }
}