Scrolling in Syncfusion Diagram

[Satya Kolachina]

Hello,

I bought a license of SyncFusion Windows Forms Studio 4.4, about a month ago. I am currently using SyncFusion Diagram control. I have the following questions. Both these are related to scrolling, but each of them is for a different purpose.

(a) I want to disable the default scrollbars given by the Diagram Control and implement my own custom scrolling. I want to use my own scrollbars. In this case how can I implement scrolling functionality, both vertical and horizontal scrolling?

(b) In my application, I need to keep a band of symbols docked to the top edge (not moving), which should always be displayed even if I am scrolling to the bottom of the diagram. I was able to keep the band of symbols docked to the top edge, just by disabling selection and moving by the user. But when I try to scroll the diagram to the bottom, then that band is disappearing. I want it to appear always, something like fixed rows in Excel spreadsheet.

Your prompt help is appreciated.

Thank you,
Satya S Kolachina

[J.Nagarajan]

Hi

1. If your intention is to implement your own scrollbars then you can use the following code snippet

SetExternalScrollBar();

private void SetExternalScrollBar()
{
this.vScrollBar1.Height = diagram1.Height;
this.hScrollBar1.Width = diagram1.Width - 16;

this.vScrollBar1.Location = new Point(diagram1.ClientRectangle.Bottom + 16,diagram1.ClientRectangle.Left);
this.hScrollBar1.Location = new Point(diagram1.ClientRectangle.Top ,diagram1.ClientRectangle.Left);

diagram1.VScrollBar.InnerScrollBar = this.vScrollBar1;
diagram1.HScrollBar.InnerScrollBar = this.hScrollBar1;
}

I have attached the sample for your reference. You can download this sample from the following page

http://websamples.syncfusion.com/samples/Diagram.Windows/F57318/main.htm

In this sample I have used Windows ScrollBars. Please refer to it and let me know if you have any questions.

2. Regarding the second issue, I am currently working on this issue. I will update you with in a couple of days.

Thanks,
Nagaraj

[J.Nagarajan]

Hi Satya,

The diagram does not allow the user to prevent scrolling of particular diagram area. However you can use another diagram control to set the top docked band of symbols. I have attached the sample that demonstrates this completely.

You can download this sample from the following page

http://websamples.syncfusion.com/samples/Diagram.Windows/DiagramScrolling/main.htm

Please let me know if you have any questions.

Thanks for using Syncfusion product.

Regards,
Nagaraj

[J.Nagarajan]

Hi Satya,

The diagram does not allow the user to prevent scrolling of particular diagram area. However you can use another diagram control to set the top docked band of symbols. I have attached the sample that demonstrates this completely.

You can download this sample from the following page

http://websamples.syncfusion.com/samples/Diagram.Windows/DiagramScrolling/main.htm

Please let me know if you have any questions.

Thanks for using Syncfusion product.

Regards,
Nagaraj

[Satya Kolachina]

Hi Nagaraj,

Thanks for researching and providing the information. I appreciate your efforts.

Before I got your reply, I already achieved what I wanted to do. As you were suggesting, I used two diagram controls for this purpose. the top diagram control hosting the non-movable symbols (scrolling completely disabled for this control) and a second diagram control instnace to actually implement scrollable diagram, with symbols that the user can interact with.

I implemented customized scrolling for the second diagram control, and through the same event handlers, I am controlling horizontal scrolling of the top diagram (and the vertical scrolling should be disabled for this control by all means, according to my requirements).

However, I will also look at your code sample to get an insight into your ideas.

Thanks a lot for the same.

Satya S Kolachina


>Hi Satya,

The diagram does not allow the user to prevent scrolling of particular diagram area. However you can use another diagram control to set the top docked band of symbols. I have attached the sample that demonstrates this completely.

You can download this sample from the following page

http://websamples.syncfusion.com/samples/Diagram.Windows/DiagramScrolling/main.htm

Please let me know if you have any questions.

Thanks for using Syncfusion product.

Regards,
Nagaraj