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数据结构(双语)/数据结构 day16【瑞客论坛 www.ruike1.com】/Visualization/AnimationLibrary/AnimatedCircle.js 一般檔案
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// Copyright 2011 David Galles, University of San Francisco. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other materials
// provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// The views and conclusions contained in the software and documentation are those of the
// authors and should not be interpreted as representing official policies, either expressed
// or implied, of the University of San Francisco
var AnimatedCircle = function(objectID, objectLabel)
{
this.objectID = objectID;
this.label = objectLabel;
this.radius = 20;
this.thickness = 3;
this.x = 0;
this.y = 0;
this.alpha = 1.0;
this.addedToScene = true;
this.highlightIndex = -1;
/* this.foregroundColor = '#007700';
this.backgroundColor = '#EEFFEE';
*/
}
AnimatedCircle.prototype = new AnimatedObject();
AnimatedCircle.prototype.constructor = AnimatedCircle;
AnimatedCircle.prototype.getTailPointerAttachPos = function(fromX, fromY, anchorPoint)
{
return this.getHeadPointerAttachPos(fromX, fromY);
}
AnimatedCircle.prototype.getWidth = function()
{
return this.radius * 2;
}
AnimatedObject.prototype.setWidth = function(newWidth)
{
this.radius = newWidth / 2;
}
AnimatedCircle.prototype.getHeadPointerAttachPos = function(fromX, fromY)
{
var xVec = fromX - this.x;
var yVec = fromY - this.y;
var len = Math.sqrt(xVec * xVec + yVec*yVec);
if (len == 0)
{
return [this.x, this.y];
}
return [this.x+(xVec/len)*(this.radius), this.y +(yVec/len)*(this.radius)];
}
AnimatedCircle.prototype.setHighlightIndex = function(hlIndex)
{
this.highlightIndex = hlIndex;
this.highlightIndexDirty = true;
}
AnimatedCircle.prototype.draw = function(ctx)
{
ctx.globalAlpha = this.alpha;
if (this.highlighted)
{
ctx.fillStyle = "#ff0000";
ctx.beginPath();
ctx.arc(this.x,this.y,this.radius + this.highlightDiff,0,Math.PI*2, true);
ctx.closePath();
ctx.fill();
}
ctx.fillStyle = this.backgroundColor;
ctx.strokeStyle = this.foregroundColor;
ctx.lineWidth = 1;
ctx.beginPath();
ctx.arc(this.x,this.y,this.radius,0,Math.PI*2, true);
ctx.closePath();
ctx.fill();
ctx.stroke();
ctx.textAlign = 'center';
ctx.font = '16px Consolas';
ctx.textBaseline = 'middle';
ctx.lineWidth = 1;
ctx.fillStyle = this.foregroundColor;
var strList = this.label.split("\n");
if (strList.length == 1)
{
if (this.highlightIndexDirty && this.highlightIndex != -1)
{
this.leftWidth = ctx.measureText(this.label.substring(0,this.highlightIndex)).width;
this.centerWidth = ctx.measureText(this.label.substring(this.highlightIndex, this.highlightIndex+1)).width;
this.textWidth = ctx.measureText(this.label).width;
this.highlightIndexDirty = false;
}
if (this.highlightIndex != -1 && this.highlightIndex < this.label.length) //this.highlghtIndex < this.label.length)
{
var startingXForHighlight = this.x - this.textWidth / 2;
ctx.textAlign = 'left';
var leftStr = this.label.substring(0, this.highlightIndex);
var highlightStr = this.label.substring(this.highlightIndex, this.highlightIndex + 1)
var rightStr = this.label.substring(this.highlightIndex + 1)
ctx.fillText(leftStr, startingXForHighlight, this.y)
ctx.strokeStyle = "#FF0000";
ctx.fillStyle = "#FF0000";
ctx.fillText(highlightStr, startingXForHighlight + this.leftWidth, this.y)
ctx.strokeStyle = this.labelColor;
ctx.fillStyle = this.labelColor;
ctx.fillText(rightStr, startingXForHighlight + this.leftWidth + this.centerWidth, this.y)
}
else
{
ctx.fillText(this.label, this.x, this.y);
}
}
else if (strList.length % 2 == 0)
{
var i;
var mid = strList.length / 2;
for (i = 0; i < strList.length / 2; i++)
{
ctx.fillText(strList[mid - i - 1], this.x, this.y - (i + 0.5) * 12);
ctx.fillText(strList[mid + i], this.x, this.y + (i + 0.5) * 12);
}
}
else
{
var mid = (strList.length - 1) / 2;
var i;
ctx.fillText(strList[mid], this.x, this.y);
for (i = 0; i < mid; i++)
{
ctx.fillText(strList[mid - (i + 1)], this.x, this.y - (i + 1) * 12);
ctx.fillText(strList[mid + (i + 1)], this.x, this.y + (i + 1) * 12);
}
}
}
AnimatedCircle.prototype.createUndoDelete = function()
{
return new UndoDeleteCircle(this.objectID, this.label, this.x, this.y, this.foregroundColor, this.backgroundColor, this.layer, this.radius);
}
function UndoDeleteCircle(id, lab, x, y, foregroundColor, backgroundColor, l, radius)
{
this.objectID = id;
this.posX = x;
this.posY = y;
this.nodeLabel = lab;
this.fgColor = foregroundColor;
this.bgColor = backgroundColor;
this.layer = l;
this.radius = radius;
}
UndoDeleteCircle.prototype = new UndoBlock();
UndoDeleteCircle.prototype.constructor = UndoDeleteCircle;
UndoDeleteCircle.prototype.undoInitialStep = function(world)
{
world.addCircleObject(this.objectID, this.nodeLabel);
world.setWidth(this.objectID, this.radius * 2);
world.setNodePosition(this.objectID, this.posX, this.posY);
world.setForegroundColor(this.objectID, this.fgColor);
world.setBackgroundColor(this.objectID, this.bgColor);
world.setLayer(this.objectID, this.layer);
}