www.pudn.com > WorkflowDesigner.rar > WfTransition.cs, change:2007-11-28,size:16252b
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
namespace WorkflowDesigner.Designer
{
/// <summary>
/// 流转可视化对象
/// </summary>
public class WfTransition :DesignerVisualObject
{
#region 字段
/// <summary>
/// 开始节点
/// </summary>
private WfAbstractActivity _start;
/// <summary>
/// 结束节点
/// </summary>
private WfAbstractActivity _end;
/// <summary>
/// 当前流转中间位置的x轴坐标
/// </summary>
private int _x;
/// <summary>
/// 当前流转中间位置的y轴坐标
/// </summary>
private int _y;
/// <summary>
/// 存放图标矩形框
/// </summary>
private Rectangle _rect;
/// <summary>
/// 条件
/// </summary>
private IList<TransCondition> conditions = new List<TransCondition>();
private String _name = "";
//参数集合
#endregion
#region 属性
public String Name
{
get { return _name; }
set { _name = value; }
}
/// <summary>
/// 条件
/// </summary>
public IList<TransCondition> Conditions
{
get { return conditions; }
set { conditions = value; }
}
/// <summary>
/// 当前流转中间位置的y轴坐标
/// </summary>
public int Y
{
get
{
return _y;
}
set
{
_y = value;
_rect = new Rectangle(_x - 4, _y - 4, 8, 8);
}
}
/// <summary>
/// 当前流转中间位置的x轴坐标
/// </summary>
public int X
{
get
{
return _x;
}
set
{
_x = value;
_rect = new Rectangle(_x - 4, _y - 4, 8, 8);
}
}
/// <summary>
/// 开始节点
/// </summary>
public WfAbstractActivity StartActivity
{
get
{
return _start;
}
set
{
_start = value;
}
}
/// <summary>
/// 结束节点
/// </summary>
public WfAbstractActivity EndActivity
{
get
{
return _end;
}
set
{
_end = value;
}
}
#endregion
#region 构造函数
/// <summary>
/// 构造函数
/// </summary>
public WfTransition(WfAbstractActivity start, WfAbstractActivity end)
{
//设置开始节点
this._start = start;
//设置结束节点
this._end = end;
//得到中心点坐标
this._x = start.X + (end.X - start.X) / 2;
this._y = start.Y + (end.Y - start.Y) / 2;
//根据中心点坐标绘制调整节点矩形
_rect = new Rectangle(_x-4,_y-4, 8, 8);
}
#endregion
#region 操作
#region 私有
#endregion
#region 保护
#endregion
#region 公用
/// <summary>
/// 判断鼠标点击出是否有可视化对象
/// </summary>
/// <param name="x">鼠标所在位置的x轴坐标</param>
/// <param name="y">鼠标所在位置的y轴坐标</param>
/// <returns>点击出的可视化对象</returns>
public override HitTestState HitTest(int x, int y)
{
if (_rect.Contains(x, y))
{
return HitTestState.Center;
}
else
{
return HitTestState.None;
}
}
/// <summary>
/// 对齐到画布上的表格
/// </summary>
public override void AlignToGrid()
{
//如果中间点的x轴坐标小于0那么中间点的x轴坐标为0
if (_x < 0)
{
_x = 0;
}
//如果中间点的x轴坐标大于等于2000那么中间点的x轴坐标为2000
else if (_x >= 2000)
{
_x = 2000;
}
else
{
//否则对齐到最近的表格线位置
_x = AlignToNumber(_x, GridSize);
}
//如果中间点的x轴坐标小于0那么中间点的y轴坐标为0
if (_y < 0)
{
_y = 0;
}
//如果中间点的y轴坐标大于等于2000那么中间点的x轴坐标为2000
else if (_y >= 2000)
{
_y = 2000;
}
else
{
//否则对齐到最近的表格线位置
_y = AlignToNumber(_y, GridSize);
}
//重新画中间点的矩形
_rect = new Rectangle(_x - 4, _y - 4, 8, 8);
}
/// <summary>
/// 框选
/// </summary>
/// <param name="rect">选中的矩形范围</param>
public override void RangeSelect(Rectangle rect)
{
//判断流转中间调整点是否在大的橡皮筋框内，如果在内则将属性设置为被选中
if (rect.Contains(this._rect))
{
this.IsSelected = true;
}
}
/// <summary>
/// 绘制
/// </summary>
/// <param name="g">绘图图面</param>
public override void Draw(Graphics g)
{
//定义画笔
using (Pen pen = new Pen(Color.Green))
{
//根据开始节点和中间控制点位置画线
g.DrawLine(pen, StartActivity.X, StartActivity.Y, _x, _y);
//根据中间控制点和结束节点位置画线
g.DrawLine(pen, _x, _y, EndActivity.X, EndActivity.Y);
}
Color nodeColor;
//如果选中,中间控制点是以红色填充的否则以蓝色填充
if (IsSelected)
{
nodeColor = Color.Red;
}
else
{
nodeColor = Color.Blue;
}
//填充中间控制点矩形的颜色
using (Brush brush = new SolidBrush(nodeColor))
{
g.FillEllipse(brush, _rect);
}
//得到起始位置（中间控制点位置）
Point source = new Point(_x, _y);
//得到目标位置（结束节点的位置）
Point target = new Point(EndActivity.X, EndActivity.Y);
//旋转角度
double angle = 0;
double x = (target.X - source.X);
double y = (target.Y - source.Y);
int x1 = 0;
int y1 = 0;
//长或宽的一半
int halfWfActivityWidthOrHeight = WfActivity.WidthAndHeight / 2;
// 垂直 x 或 y方向
// 特殊处理以防止除0
if (x == 0 || y == 0)
{
//如果x=0and y>0为90度y轴-长或宽的一半(确定画图标的位置) 如果x=0and y<0则为270度
if (x == 0)
{
if (y > 0)
{
angle = 90;
x1 = target.X;
y1 = target.Y - halfWfActivityWidthOrHeight;
}
else
{
angle = 270;
x1 = target.X;
y1 = target.Y + halfWfActivityWidthOrHeight;
}
}
//如果y=0and x>0为0度x轴-长或宽的一半(确定画图标的位置) 如果y=0and x<0则为180度
else if (y == 0)
{
if (x > 0)
{
angle = 0;
x1 = target.X - halfWfActivityWidthOrHeight;
y1 = target.Y;
}
else
{
angle = 180;
x1 = target.X + halfWfActivityWidthOrHeight;
y1 = target.Y;
}
}
}
else
{
//计算角度 并计算图片的坐标
double xDIVy = x / y;
double yDIVx = y / x;
double c = Math.Atan(xDIVy);
angle = -(c * 180 / Math.PI);
angle += 90;
double c1 = Math.Atan(yDIVx);
if (xDIVy == 1)
{
if (x > 0)
{
x1 = target.X - halfWfActivityWidthOrHeight;
y1 = target.Y - halfWfActivityWidthOrHeight;
}
else
{
angle += 180;
x1 = target.X + halfWfActivityWidthOrHeight;
y1 = target.Y + halfWfActivityWidthOrHeight;
}
}
else if (xDIVy == -1)
{
if (x > 0)
{
angle += 180;
x1 = target.X - halfWfActivityWidthOrHeight;
y1 = target.Y + halfWfActivityWidthOrHeight;
}
else
{
x1 = target.X + halfWfActivityWidthOrHeight;
y1 = target.Y - halfWfActivityWidthOrHeight;
}
}
else if (xDIVy < -1)
{
x1 = halfWfActivityWidthOrHeight;
y1 = (int)(x1 / Math.Tan(c));
if (x > 0)
{
angle += 180;
x1 = target.X - x1;
}
else
{
x1 = target.X + x1;
}
if (y > 0)
{
y1 = target.Y + y1;
}
else
{
y1 = target.Y - y1;
}
}
else if (xDIVy > 1)
{
x1 = halfWfActivityWidthOrHeight;
y1 = (int)(x1 / Math.Tan(c));
if (x > 0)
{
x1 = target.X - x1;
}
else
{
angle += 180;
x1 = target.X + x1;
}
if (y > 0)
{
y1 = target.Y - y1;
}
else
{
y1 = target.Y + y1;
}
}
else if (xDIVy > -1 && xDIVy < 0)
{
y1 = halfWfActivityWidthOrHeight;
x1 = (int)(y1 / Math.Tan(c1));
if (x > 0)
{
angle += 180;
x1 = target.X + x1;
}
else
{
x1 = target.X - x1;
}
if (y > 0)
{
y1 = target.Y - y1;
}
else
{
y1 = target.Y + y1;
}
}
else if (xDIVy < 1 && xDIVy > 0)
{
y1 = halfWfActivityWidthOrHeight;
x1 = (int)(y1 / Math.Tan(c1));
if (x > 0)
{
x1 = target.X - x1;
}
else
{
angle += 180;
x1 = target.X + x1;
}
if (y > 0)
{
y1 = target.Y - y1;
}
else
{
y1 = target.Y + y1;
}
}
}
ImageAttributes imAtt = new ImageAttributes();
//设置颜色键
imAtt.SetColorKey(Color.FromArgb(255, 0, 255), Color.FromArgb(255, 0, 255));
// 画箭头
Bitmap arrowBitmap = WorkflowDesigner.Properties.Resources.trans_arrow;
int imgWidth = arrowBitmap.Width;
int imgHeight = arrowBitmap.Height;
Rectangle rcDest = new Rectangle();
rcDest.X = -imgWidth / 2;
rcDest.Y = -imgHeight / 2;
rcDest.Width = imgWidth;
rcDest.Height = imgWidth;
GraphicsState gs = g.Save();
//平移（世界变换矩阵平移）
g.TranslateTransform(x1, y1);
//根据角度旋转（世界变换旋转）
g.RotateTransform((float)angle);
//绘制图片
g.DrawImage(arrowBitmap, rcDest,
0, 0,
imgWidth,
imgWidth,
GraphicsUnit.Pixel,
imAtt);
//释放
imAtt.Dispose();
arrowBitmap.Dispose();
//还原到原来的表示状态
g.Restore(gs);
// sm add
if ((this.Name != "") || (this.conditions.Count > 0))
{
StringFormat format1 = new StringFormat(StringFormatFlags.NoClip);
format1.Alignment = StringAlignment.Center;
format1.LineAlignment = StringAlignment.Near;
Brush brushString = new SolidBrush(Color.Black);
Font font = new Font("新宋体", 9);
String Caption = this.Name;
if (this.conditions.Count > 0)
{
if (Caption != "")
{
Caption = Caption + "\r\n [" + this.conditions.Count.ToString() + "个判断条件]";
}
else
Caption =" [" + this.conditions.Count.ToString() + "个判断条件]";
}
g.DrawString(Caption, font, brushString, new PointF(_x, _y + 9), format1);
format1.Dispose();
font.Dispose();
brushString.Dispose();
}
}
/// <summary>
/// 移动
/// </summary>
/// <param name="offX">移动新位置与原坐标偏移值的x轴坐标</param>
/// <param name="offY">>移动新位置与原坐标偏移值的y轴坐标</param>
public override void Move(int offX, int offY)
{
//将中心点坐标加上偏移值，得到最新的流转中间调整点
_x += offX;
_y += offY;
//根据中心点坐标绘制调整节点矩形
_rect = new Rectangle(_x - 4, _y - 4, 8, 8);
}
/// <summary>
/// 打开属性对话框
/// </summary>
public override void OpenPropertyDialog()
{
TransitionInfoDlg dlg = new TransitionInfoDlg();
dlg.WfTransition = this;
//dlg.List = this.conditions;
dlg.ShowDialog();
dlg.Dispose();
}
/// <summary>
/// 图形矩阵
/// </summary>
/// <returns>返回一个图形矩阵</returns>
public override Rectangle GetRange()
{
return new Rectangle(0, 0, 0, 0);
}
#endregion
#endregion
}
}