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GetPortAt

I have used GetPortAt before and it worked, but now I have either forgotten how I used it or for some unkown reason it has just stopped working! A sample application is attached. Does this function work for ports that belong to a symbol? Thanks Truman WindowsApplication3_5452.zip

2 Replies

Administrator November 23, 2004 05:26 PM UTC

Hi Truman, A Port is an object anchored to a symbol that provides a location at which connections to other symbols can be made. 1) Here is a code snippet that demonstrates how you can get the location of the ports of the selected instance of MySymbol: private void PortLocation_Click(object sender, System.EventArgs e) { string portlocation = string.Empty; if (this.diagram1.SelectionList.Count == 1) { if(this.diagram1.SelectionList.First.GetType() == typeof(MySymbol)) { MySymbol mysym = (MySymbol)this.diagram1.SelectionList.First; foreach( Port port in mysym.Ports ) { portlocation+= port.Name + ":" + port.Location.ToString() + "\r"; } } } this.label1.Text = portlocation; } 2. 2) Here is a code snippet that updates the text of the label based on whether the user clicked on a port or did not (using the View''s GetPortAt() method: private void diagram1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) { Port port = this.diagram1.View.GetPortAt(new Point(e.X,e.Y),0); if(port!=null) { if(port.GetType()==typeof(Syncfusion.Windows.Forms.Diagram.CirclePort)) this.label1.Text = ("You clicked on port:" + port.Name); } else this.label1.Text ="You did not click on a port"; } 3. And finally here is the custom Symbol class(MySymbol): public class MySymbol : Symbol { private Syncfusion.Windows.Forms.Diagram.Rectangle outerRect = null; private Ellipse innerEllipse = null; private CirclePort leftport; private CirclePort rightport; public MySymbol() { ////////////////////////////////////////////////////////////////// // Add child nodes to the symbol programmatically ////////////////////////////////////////////////////////////////// // Add an outer rectangle this.outerRect = new Syncfusion.Windows.Forms.Diagram.Rectangle(0, 0, 120, 80); this.outerRect.Name = "Rectangle"; this.outerRect.FillStyle.Type = Syncfusion.Windows.Forms.Diagram.FillStyle.FillType.LinearGradient; this.outerRect.FillStyle.Color = System.Drawing.Color.Gold; this.outerRect.FillStyle.GradientStartColor = System.Drawing.Color.Gray; this.outerRect.ShadowStyle.Visible = true; this.outerRect.LineStyle.LineWidth = 1; this.AppendChild(outerRect); // Add an inner ellipse this.innerEllipse = new Ellipse(10, 10, 100, 60); this.innerEllipse.Name = "Ellipse"; this.innerEllipse.LineStyle.LineWidth = 1; this.innerEllipse.ShadowStyle.Visible = false; this.AppendChild(innerEllipse); //Port locations leftport = new CirclePort(new PointF(0, this.Height / 2)); leftport.Name = "LeftPort"; rightport = new CirclePort(new PointF(this.Width, this.Height / 2)); rightport.Name = "RightPort"; //Append CirlePorts to MySymbol AppendChild(leftport); AppendChild(rightport); //Make CenterPort visible this.CenterPort.Visible = true; //Add Label Label lbl = this.AddLabel("My Symbol", BoxPosition.Center); lbl.BackgroundStyle.Color = Color.Transparent; } } Regards Arun

Administrator November 23, 2004 06:25 PM UTC

Thanks for the explanation. I was flawed in thinking that I could just add a port to a diagram and then connect to it. The reason that I asked this is I was copying symbols from one diagram to another and the ports of the copied symbols were not linkable. It seems that when I cloned the original symbol that the collection of ports for the new symbol were getting their parents set to nothing. To fix this I had to go through the collection and set each port''s parent to the newly created symbol. Truman
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