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Position of shape's text

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Diagram, DiagramRibbonBar, DiagramToolBox
This is a migrated thread and some comments may be shown as answers.
Tino
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Tino asked on 11 Sep 2017, 11:22 PM

I'd like to position a Shape's text outside of the shape itself. Can this be accomplished?

Initially I thought I might have to have a separate Label shape associated with every shape, to achieve this. I also need to apply alignment, e.g. left, center, right, so perhaps a separate Label shape would be better, then group it with its shape (as they are inseparable).

 

Example

 

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Dimitar
Telerik team
answered on 12 Sep 2017, 08:04 AM
Hello Tino,

To achieve this you can create a custom shape, add a second text element and set its position offset:
class MyDiagramShape : RadDiagramShape
{
    LightVisualElement label = new LightVisualElement();
    protected override void CreateChildElements()
    {
        base.CreateChildElements();
        label.Text = "Test Label";
        label.PositionOffset = new SizeF(-100, 0);
        this.DiagramShapeElement.Children.Add(label);
    }
}

I hope this will be useful. Let me know if you have additional questions.

Regards,
Dimitar
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Tino
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answered on 12 Sep 2017, 11:51 PM

Sounds like a great idea. I will experiment with this and see if it's a good solution for me.

Would the shape bounds then encompass the label as well?

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Dimitar
Telerik team
answered on 13 Sep 2017, 05:12 AM
Hi Tino,

The text will be outside of the shape bounds but will be moved with the shape. I have attached a small video that shows the result.

Should you have any other questions do not hesitate to ask. 

Regards,
Dimitar
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Tino
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answered on 14 Sep 2017, 06:25 AM

What I meant is whether the shape's bounding box are considered to encompass both shape and label.

Anyway I have tried this and it looks like a possibility. It seems there is text alignment, which I need.

Further, will I able to do the following:

1. Allow in-place editing of this additional text

2. Set the bounds for the text (currently I'm seeing long text cut off). Do I use the TextBlock property?

3. Display an outline to show where the bounds of the text are

 

Thanks

0
Dimitar
Telerik team
answered on 14 Sep 2017, 12:11 PM
Hi Tino,

You can use the following approach to achieve the desired layout:
class MyDiagramShape : RadDiagramShape
{
    RadTextBox label = new RadTextBox();
    RadHostItem hostItem;
    protected override void CreateChildElements()
    {
        base.CreateChildElements();
 
         hostItem = new RadHostItem(label);
 
        hostItem.StretchVertically = false;
        hostItem.ShouldHandleMouseInput = true;
        hostItem.NotifyParentOnMouseInput = false;
        hostItem.Text = "Test Label";       
       
        this.Children.Add(hostItem);
      
    }
    protected override SizeF ArrangeOverride(SizeF finalSize)
    {
        var result = base.ArrangeOverride(finalSize);
        var recatangle = new RectangleF(finalSize.Width / 2, 0,  (finalSize.Width / 2), finalSize.Height);
        var rectangle2 = new RectangleF(0, 0, finalSize.Width / 2, 25);
 
        this.hostItem.Arrange(rectangle2);
        this.DiagramShapeElement.Arrange(recatangle);
 
        return result;
    }
}

Should you have any other questions do not hesitate to ask.

Regards,
Dimitar
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Tino
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answered on 15 Sep 2017, 04:15 AM

Thanks for the extra option. I've tried it, but at the moment I'm going with the other method. Having the TextBox always active and with a border (although I'm sure I could customize that) wasn't quite what I wanted. I need behaviour similar to the standard shape's text editing.

You've also answered another question I was going to ask, which is how to have compound shapes. Now I know the technique for doing that. For instance I need to display radio buttons, as a single group (they don't have to be functional, just visual). Unless there's another way, I'll just add circle objects and offset them from each other.

 

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Tino
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answered on 15 Sep 2017, 04:48 AM
Actually no that would be done in my ElementShape derived classes CreateGeometry() ?
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Tino
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answered on 15 Sep 2017, 04:49 AM
Correction CreatePath()
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Dimitar
Telerik team
answered on 18 Sep 2017, 06:47 AM
Hello Tino,

The approach from my previous post shows how you can add the text box within the bounds of the shape as well. And this will work with a label element as well. 

This approach is suitable for adding and arranging any controls or elements. If you want you can add another LightVisualElement that has its own shape. For example:
class MyDiagramShape : RadDiagramShape
{
 
    LightVisualButtonElement secondShape = new LightVisualButtonElement();
    protected override void CreateChildElements()
    {
        base.CreateChildElements();
 
        secondShape.ShouldHandleMouseInput = true;
        secondShape.NotifyParentOnMouseInput = false;
        secondShape.Text = "Test Label";
        secondShape.DrawFill = true;
        secondShape.BackColor = System.Drawing.Color.Red;
 
        StarShape starShape = new StarShape();
        starShape.Arms = 12;
        starShape.InnerRadiusRatio = .5f;
 
        secondShape.Shape = starShape;
 
        this.Children.Add(secondShape);
      
    }
    protected override SizeF ArrangeOverride(SizeF finalSize)
    {
        var result = base.ArrangeOverride(finalSize);
        var recatangle = new RectangleF(finalSize.Width / 2, 0,  (finalSize.Width / 2), finalSize.Height);
        var rectangle2 = new RectangleF(0, 0, finalSize.Width / 2, finalSize.Height);
 
        this.secondShape.Arrange(rectangle2);
        this.DiagramShapeElement.Arrange(recatangle);
 
        return result;
    }
     
}

Please let me know if there is something else I can help you with. 

Regards,
Dimitar
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Tino
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answered on 18 Sep 2017, 08:19 AM

It seems there's more than one way to do this

What I'm trying to achieve overall, is a kind of UI form designer.

I will have checkbox, radio button, combobox, text field, table, etc.

I thought the way was to have one ElementShape-derived class for each of my element types, and override CreatePath. This is working reasonably well. Is this a reasonable approach? It seems to be recommended in the Custom Shapes docs.

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Dimitar
Telerik team
answered on 19 Sep 2017, 08:12 AM
Hi Tino,

If you want to add controls and the user should be able to interact with them, use my approach and add elements. If you want to have only shapes that can be drawn by using a path, use the element shape. However please note that each element can have one shape only. Both approaches are valid and you should choose the one more suitable for your case.

Should you have any other questions do not hesitate to ask.

Regards,
Dimitar
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Tino
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answered on 21 Sep 2017, 06:41 AM
Thanks I will consider the options.
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Tino
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answered on 21 Sep 2017, 06:59 AM
Also, if you could please explain how to use RadHostItem , CreateChildElements, ArrangeOverride and LightVisualElement to get the desired result, or point to some docs or sample code, that would be great. I don't seem to have seem seen a good explanation combining all of these. Tomorrow I will try an approach using these.
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Tino
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answered on 22 Sep 2017, 05:51 AM

So I've put together the following based on various suggestions. This is pretty much the same result as I had with the CreatePath technique, but now I actually have a filled triangle in my sample 'dropdown' shape. I also have an offset Label.

A few things though:

1. I can't drag the shape by the text
2. I'm not sure how to get a border around my rectangle; I set 'DrawBorder' to true and got a rounded rectangle border

Otherwise, this seems ok. Please comment on the code below.

 

using System.Drawing;
using System.Drawing.Drawing2D;
using Telerik.WinControls;
using Telerik.WinControls.UI;
 
namespace TestDiagram
{
    class DropdownShape : RadDiagramShape
    {
 
        LightVisualElement rectangle = new LightVisualElement();
        LightVisualElement triangle = new LightVisualElement();
        LightVisualElement label = new LightVisualElement();
 
        protected override void CreateChildElements()
        {
            base.CreateChildElements();
 
            this.Size = new Size(150, 15);
//            this.DrawBorder = true;
 
            label.Text = "Test Label";
            label.PositionOffset = new Size(-120, 0);
 
            rectangle.ShouldHandleMouseInput = true;
            rectangle.NotifyParentOnMouseInput = false;
 
            rectangle.DrawFill = true;
            rectangle.BackColor = Color.LightGray;
 
            triangle.DrawFill = true;
            triangle.BackColor = Color.Black;
 
            var rectangleShape = new CustomShape();
            rectangleShape.CreateRectangleShape(0, 0, 150, 15);
 
            var triangleShape = new TriangleShape();
 
            rectangle.Shape = rectangleShape;
            triangle.Shape = triangleShape;
 
            this.Children.Add(rectangle);
            this.Children.Add(triangle);
            this.Children.Add(label);
        }
 
        protected override SizeF ArrangeOverride(SizeF finalSize)
        {
            var result = base.ArrangeOverride(finalSize);
            var rectTriangle = new RectangleF(finalSize.Width - 10, finalSize.Height / 2 -3 , 15, 15);
            var rectRectangle = new RectangleF(0, 0, finalSize.Width, finalSize.Height);
            var rectMain = new RectangleF(0, 0, finalSize.Width, finalSize.Height);
 
            this.rectangle.Arrange(rectRectangle);
            this.triangle.Arrange(rectTriangle);
            this.DiagramShapeElement.Arrange(rectMain);
 
            return result;
        }
 
    }
 
    class TriangleShape : ElementShape
    {
        public override GraphicsPath CreatePath(Rectangle bounds)
        {
            var path = new GraphicsPath();
 
            Point[] points =
            {
                new Point( bounds.X, bounds.Y ),
                new Point( bounds.X + 6, bounds.Y),
                new Point( bounds.X + 3, bounds.Y + 6)
            };
 
            path.AddPolygon(points);
 
            return path;
        }
    }
}

 

 

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Tino
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answered on 22 Sep 2017, 05:55 AM

And also..

 

using Telerik.Windows.Diagrams.Core;
 
namespace TestDiagram
{
    public partial class RadForm1 : Telerik.WinControls.UI.RadForm
    {
        public RadForm1()
        {
            InitializeComponent();
 
            var dropdownShape = new DropdownShape()
            {
                Position = new Point(100, 100)
            };
            radDiagram1.AddShape(dropdownShape);
        }
    }
}
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Tino
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answered on 22 Sep 2017, 06:33 AM
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Dimitar
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answered on 25 Sep 2017, 10:00 AM
Hello Tino,

We can continue to discuss this in the other thread and I will close this one for now.

Regards,
Dimitar
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Renier Pretorius
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Iron
Iron
Iron
answered on 03 Oct 2019, 10:14 AM
Hi, I am trying to achieve the same in WPF. Is that possible? The CreateChildElements method does not exist in WPF.
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Dimitar
Telerik team
answered on 03 Oct 2019, 11:44 AM

Hi Renier,

It would be better to ask your questions in the WPF forum where you can receive an answer from the WPF community: Diagram in UI for WPF - Telerik Forums.

Thank you for your understanding.

Regards,
Dimitar
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Greg
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answered on 24 Mar 2020, 04:52 PM
I can not find how to reference LightVisualElement.  What namespace is that in?
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Nadya | Tech Support Engineer
Telerik team
answered on 25 Mar 2020, 10:26 AM

Hello Greg,

LightVisualElement is in Telerik.WinControls.UI namespace. In general, you should always have Telerik.WinControls.UI, Telerik.WinControls and TelerikCommon assemblies in your project.

I hope this helps. Please, let me know if you need further assistance.

Regards,
Nadya
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Tags
Diagram, DiagramRibbonBar, DiagramToolBox
Asked by
Tino
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Answers by
Dimitar
Telerik team
Tino
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Renier Pretorius
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Iron
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Greg
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Nadya | Tech Support Engineer
Telerik team
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