/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*
* $Id: file 64488 2006-03-10 17:32:09Z paulo $
*/

mindplot.ScreenManager = function(width, height, divElement)
{
    this._divContainer = divElement;
    this._offset = {x:0,y:0};
};

mindplot.ScreenManager.prototype.setScale = function(scale)
{
    core.assert(core.Utils.isDefined(scale), 'Screen scale can not be null');
    this._workspaceScale = scale;
};

mindplot.ScreenManager.prototype.getWorkspaceElementPosition = function(e)
{
    // Retrive current element position.
    var elementPosition = e.getPosition();
    var x = elementPosition.x;
    var y = elementPosition.y;

    // Add workspace offset.
    x = x - this._offset.x;
    y = y - this._offset.y;

    // Scale coordinate in order to be relative to the workspace. That's coordSize/size;
    x = x / this._workspaceScale;
    y = y / this._workspaceScale;

    // Subtract div position.
    /*    var containerElem = this.getContainer();
var containerPosition = core.Utils.workOutDivElementPosition(containerElem);
x = x + containerPosition.x;
y = y + containerPosition.y;*/

    // Remove decimal part..
    return {x:x,y:y};
};

mindplot.ScreenManager.prototype.getWorkspaceIconPosition = function(e)
{
    // Retrive current icon position.
    var image = e.getImage();
    var elementPosition = image.getPosition();
    var imageSize = e.getSize();

    //Add group offset
    var iconGroup = e.getGroup();
    var group = iconGroup.getNativeElement();
    var coordOrigin=group.getCoordOrigin();
    var groupSize = group.getSize();
    var coordSize = group.getCoordSize();

    var scale={x:coordSize.width/parseInt(groupSize.width), y:coordSize.height/parseInt(groupSize.height)};

    var x = (elementPosition.x - coordOrigin.x-(parseInt(imageSize.width)/2))/scale.x;
    var y = (elementPosition.y - coordOrigin.y-(parseInt(imageSize.height)/2))/scale.y;

    //Retrieve iconGroup Position
    var groupPosition = iconGroup.getPosition();
    x = x + groupPosition.x;
    y = y + groupPosition.y;

    //Retrieve topic Position
    var topic = iconGroup.getTopic();
    var topicPosition = this.getWorkspaceElementPosition(topic);
    topicPosition.x = topicPosition.x - (parseInt(topic.getSize().width)/2);


    // Remove decimal part..
    return {x:x+topicPosition.x,y:y+topicPosition.y};
};

mindplot.ScreenManager.prototype.getWorkspaceMousePosition = function(e)
{
    // Retrive current mouse position.
    var mousePosition = this._getMousePosition(e);
    var x = mousePosition.x;
    var y = mousePosition.y;

    // Subtract div position.
    var containerElem = this.getContainer();
    var containerPosition = core.Utils.workOutDivElementPosition(containerElem);
    x = x - containerPosition.x;
    y = y - containerPosition.y;

    // Scale coordinate in order to be relative to the workspace. That's coordSize/size;
    x = x * this._workspaceScale;
    y = y * this._workspaceScale;

    // Add workspace offset.
    x = x + this._offset.x;
    y = y + this._offset.y;

    // Remove decimal part..
    return new core.Point(x, y);
};

/**
 * http://www.howtocreate.co.uk/tutorials/javascript/eventinfo
 */
mindplot.ScreenManager.prototype._getMousePosition = function(event)
{
    return core.Utils.getMousePosition(event);
};

mindplot.ScreenManager.prototype.getContainer = function()
{
    return this._divContainer;
};

mindplot.ScreenManager.prototype.setOffset = function(x, y)
{
    this._offset.x = x;
    this._offset.y = y;
};