public static Shape CreateShape(string value)
{
Shape shape = null;
string shapeCategory = value.Substring(0, value.IndexOf(";"));
switch (shapeCategory)
{
case "圆":
shape = new Circle();
break;
case "点":
shape = new Dot();
break;
case "矩形":
shape = new MyRect();
break;
case "直线":
shape = new Line();
break;
case "三角形":
shape = new Triangle();
break;
case "文字":
shape = new MyText();
break;
case "曲线":
shape = new Curve();
break;
}
shape.FromString(value);
return(shape);
}
public static Shape CreateShape(XmlNode node)
{
Shape shape = null;
switch (node.Name)
{
case "Circle":
shape = new Circle();
break;
case "Dot":
shape = new Dot();
break;
case "Triangle":
shape = new Triangle();
break;
case "Rectangle":
shape = new MyRect();
break;
case "Curve":
shape = new Curve();
break;
case "Text":
shape = new MyText();
break;
case "Line":
shape = new Line();
break;
}
shape.FromXML(node);
return(shape);
}
private void FormDocument_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button != MouseButtons.Left)
{
return;
}
int shapeCount = this.document.Shapes.Count;
switch (this.FormMain.CurrentShape)
{
case ShapeCategory.点:
break;
case ShapeCategory.直线:
//int lineCount = this.document.Lines.Count;
if (shapeCount > 0)
{
Line lastline = (Line)this.document.Shapes[shapeCount - 1];
lastline.EndPoint = e.Location;
}
break;
case ShapeCategory.曲线:
if (shapeCount > 0)
{
Curve lastCurve = (Curve)this.document.Shapes[shapeCount - 1];
lastCurve.Points.Add(e.Location);
}
break;
case ShapeCategory.圆:
if (shapeCount > 0)
{
Circle lastCircle = (Circle)this.document.Shapes[shapeCount - 1];
lastCircle.MouseLocation = e.Location;
lastCircle.Status = ShapeStatus.预览;
lastCircle.Radius = (float)Math.Sqrt(
Math.Pow(e.Location.X - lastCircle.CenterPoint.X, 2) +
Math.Pow(e.Location.Y - lastCircle.CenterPoint.Y, 2)
);
}
break;
case ShapeCategory.矩形:
if (shapeCount > 0)
{
MyRect lastRectF = (MyRect)this.document.Shapes[shapeCount - 1];
RectangleF rectangleF = RectangleF.Empty; //赋值给rectangleF
rectangleF.X = (e.Location.X < startPoint.X) ? e.Location.X : startPoint.X;
rectangleF.Y = (e.Location.Y < startPoint.Y) ? e.Location.Y : startPoint.Y;
rectangleF.Width = Math.Abs(e.Location.X - startPoint.X);
rectangleF.Height = Math.Abs(e.Location.Y - startPoint.Y);
lastRectF.RectF = rectangleF; //这是什么意思？ 为什么又赋值回去
}
break;
case ShapeCategory.角形:
switch (this.mouseClientCount)
{
case 0:
break;
case 1:
if (shapeCount > 0)
{
Triangle lastTriangle = (Triangle)this.document.Shapes[shapeCount - 1];
lastTriangle.B = lastTriangle.C = e.Location;
}
break;
case 2:
if (shapeCount > 0)
{
Triangle lastTriangle = (Triangle)this.document.Shapes[shapeCount - 1];
lastTriangle.C = e.Location;
}
break;
}
break;
case ShapeCategory.文字:
break;
}
this.DrawShapes();
}
private void FormDocument_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button != MouseButtons.Left)
{
return;
}
if (this.FormMain == null)
{
return;
}
ShapeCategory shapeCategory = this.FormMain.CurrentShape;
switch (shapeCategory)
{
case ShapeCategory.点:
Dot dot = new Dot();
dot.Position = e.Location;
dot.Color = this.FormMain.CurrentColor;
dot.Weight = this.FormMain.CurrentWeight;
this.document.AddShape(dot);
break;
case ShapeCategory.直线:
Line line = new Line();
line.StartPoint = e.Location;
line.EndPoint = e.Location;
line.Color = this.FormMain.CurrentColor;
line.Weight = this.FormMain.CurrentWeight;
line.DashStyle = this.FormMain.CurrentDashStyle;
this.document.AddShape(line);
break;
case ShapeCategory.曲线:
Curve curve = new Curve();
curve.Color = this.FormMain.CurrentColor;
curve.DashStyle = this.FormMain.CurrentDashStyle;
curve.Weight = this.FormMain.CurrentWeight;
curve.Points.Add(e.Location);
this.document.AddShape(curve);
break;
case ShapeCategory.圆:
Circle circle = new Circle();
circle.Color = this.FormMain.CurrentColor;
circle.DashStyle = this.FormMain.CurrentDashStyle;
circle.Weight = this.FormMain.CurrentWeight;
circle.CenterPoint = e.Location;
circle.MouseLocation = e.Location;
circle.Status = ShapeStatus.预览;
this.document.AddShape(circle);
break;
case ShapeCategory.矩形:
this.startPoint = e.Location;
MyRect myRect = new MyRect(); //new一个Myrect（自定义的类）对象
myRect.Color = this.FormMain.CurrentColor;
myRect.DashStyle = this.FormMain.CurrentDashStyle;
myRect.Weight = this.FormMain.CurrentWeight;
RectangleF rectangleF = new RectangleF(); //new一个RectangleF（系统定义的结构？）对象
rectangleF.X = e.Location.X;
rectangleF.Y = e.Location.Y;
rectangleF.Width = 0f;
rectangleF.Height = 0f;
myRect.RectF = rectangleF; //把
this.document.AddShape(myRect);
break;
case ShapeCategory.角形:
//int triangleCount = this.document.Triangles.Count;
int shapeCount = this.document.Shapes.Count;
switch (this.mouseClientCount)
{
case 0:
Triangle triangle = new Triangle();
triangle.Color = this.FormMain.CurrentColor;
triangle.DashStyle = this.FormMain.CurrentDashStyle;
triangle.Weight = this.FormMain.CurrentWeight;
triangle.A = triangle.B = triangle.C = e.Location;
this.document.AddShape(triangle);
break;
case 1:
if (shapeCount > 0)
{
Triangle lastTriangle = (Triangle)this.document.Shapes[shapeCount - 1];
lastTriangle.B = lastTriangle.C = e.Location;
}
break;
case 2:
if (shapeCount > 0)
{
Triangle lastTriangle = (Triangle)this.document.Shapes[shapeCount - 1];
lastTriangle.C = e.Location;
}
break;
}
break;
case ShapeCategory.文字:
MyText myText = new MyText();
myText.Color = this.FormMain.CurrentColor;
myText.Weight = this.FormMain.CurrentWeight * 10f;
myText.Position = e.Location;
this.document.AddShape(myText);
this.Controls.Clear();
TextBox textBox = new TextBox();
textBox.Multiline = true;
textBox.Location = e.Location;
textBox.Height = (int)(this.FormMain.CurrentWeight * 10 * 4f);
textBox.Width = 60 * textBox.Height;
textBox.Font = new Font("微软雅黑", myText.Weight);
textBox.TextChanged += textBox_TextChanged; //委托与事件
this.Controls.Add(textBox);
break;
}
this.DrawShapes();
}