// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

/**
 * This view stacks three boxes -- one at the top, one at the bottom, and
 * one that fills the remaining space between those two.
 *
 *  +----------------------+
 *  |      topbar          |
 *  +----------------------+
 *  |                      |
 *  |                      |
 *  |                      |
 *  |                      |
 *  |      middlebox       |
 *  |                      |
 *  |                      |
 *  |                      |
 *  |                      |
 *  |                      |
 *  +----------------------+
 *  |     bottombar        |
 *  +----------------------+
 *
 *  @constructor
 */
function TopMidBottomView(topView, midView, bottomView) {
  View.call(this);

  this.topView_ = topView;
  this.midView_ = midView;
  this.bottomView_ = bottomView;
}

inherits(TopMidBottomView, View);

TopMidBottomView.prototype.setGeometry = function(left, top, width, height) {
  TopMidBottomView.superClass_.setGeometry.call(this, left, top, width, height);

  // Calculate the vertical split points.
  var topbarHeight = this.topView_.getHeight();
  var bottombarHeight = this.bottomView_.getHeight();
  var middleboxHeight = height - (topbarHeight + bottombarHeight);

  // Position the boxes using calculated split points.
  this.topView_.setGeometry(left, top, width, topbarHeight);
  this.midView_.setGeometry(left, this.topView_.getBottom(),
                            width, middleboxHeight);
  this.bottomView_.setGeometry(left, this.midView_.getBottom(),
                               width, bottombarHeight);
};

TopMidBottomView.prototype.show = function(isVisible) {
  TopMidBottomView.superClass_.show.call(this, isVisible);
  this.topView_.show(isVisible);
  this.midView_.show(isVisible);
  this.bottomView_.show(isVisible);
};