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// Copyright 2007 The Closure Library Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//      http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS-IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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 * @fileoverview A thick wrapper around shapes with custom paths.
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 * @author [email protected] (Robby Walker)
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 */
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goog.provide('goog.graphics.ext.Shape');
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goog.require('goog.graphics.ext.StrokeAndFillElement');
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/**
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 * Wrapper for a graphics shape element.
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 * @param {goog.graphics.ext.Group} group Parent for this element.
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 * @param {!goog.graphics.ext.Path} path  The path to draw.
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 * @param {boolean=} opt_autoSize Optional flag to specify the path should
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 *     automatically resize to fit the element.  Defaults to false.
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 * @constructor
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 * @extends {goog.graphics.ext.StrokeAndFillElement}
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 * @final
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 */
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goog.graphics.ext.Shape = function(group, path, opt_autoSize) {
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  this.autoSize_ = !!opt_autoSize;
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  var graphics = group.getGraphicsImplementation();
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  var wrapper = graphics.drawPath(path, null, null, group.getWrapper());
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  goog.graphics.ext.StrokeAndFillElement.call(this, group, wrapper);
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  this.setPath(path);
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};
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goog.inherits(goog.graphics.ext.Shape, goog.graphics.ext.StrokeAndFillElement);
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/**
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 * Whether or not to automatically resize the shape's path when the element
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 * itself is resized.
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 * @type {boolean}
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 * @private
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 */
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goog.graphics.ext.Shape.prototype.autoSize_ = false;
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/**
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 * The original path, specified by the caller.
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 * @type {goog.graphics.Path}
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 * @private
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 */
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goog.graphics.ext.Shape.prototype.path_;
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/**
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 * The bounding box of the original path.
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 * @type {goog.math.Rect?}
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 * @private
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 */
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goog.graphics.ext.Shape.prototype.boundingBox_ = null;
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/**
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 * The scaled path.
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 * @type {goog.graphics.Path}
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 * @private
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 */
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goog.graphics.ext.Shape.prototype.scaledPath_;
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/**
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 * Get the path drawn by this shape.
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 * @return {goog.graphics.Path?} The path drawn by this shape.
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 */
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goog.graphics.ext.Shape.prototype.getPath = function() {
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  return this.path_;
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};
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/**
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 * Set the path to draw.
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 * @param {goog.graphics.ext.Path} path The path to draw.
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 */
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goog.graphics.ext.Shape.prototype.setPath = function(path) {
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  this.path_ = path;
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  if (this.autoSize_) {
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    this.boundingBox_ = path.getBoundingBox();
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  }
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  this.scaleAndSetPath_();
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};
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/**
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 * Scale the internal path to fit.
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 * @private
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 */
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goog.graphics.ext.Shape.prototype.scaleAndSetPath_ = function() {
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  this.scaledPath_ = this.boundingBox_ ?
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      this.path_.clone().modifyBounds(
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          -this.boundingBox_.left, -this.boundingBox_.top,
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          this.getWidth() / (this.boundingBox_.width || 1),
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          this.getHeight() / (this.boundingBox_.height || 1)) :
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      this.path_;
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  var wrapper = this.getWrapper();
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  if (wrapper) {
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    wrapper.setPath(this.scaledPath_);
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  }
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};
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/**
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 * Redraw the ellipse.  Called when the coordinate system is changed.
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 * @protected
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 * @override
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 */
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goog.graphics.ext.Shape.prototype.redraw = function() {
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  goog.graphics.ext.Shape.superClass_.redraw.call(this);
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  if (this.autoSize_) {
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    this.scaleAndSetPath_();
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  }
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};
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/**
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 * @return {boolean} Whether the shape is parent dependent.
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 * @protected
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 * @override
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 */
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goog.graphics.ext.Shape.prototype.checkParentDependent = function() {
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  return this.autoSize_ ||
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      goog.graphics.ext.Shape.superClass_.checkParentDependent.call(this);
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};
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