Draw Lines/Arrows with CVI

[Letty]

Hello,

Can I draw arrows with cvi?

[Wolfgang]

Yes. On a graph control, you could use annotations; you could use the function SetAnnotationAttribute with ATTR_ANNOTATION_ARROW_STYLE to define the style of your arrow.

[Brandon_B]

Hello Letty,

You may also want to take a look at this forum post which shows how to use a canvas control to draw a line.

Regards,

[Letty]

Brandon,

Let me try that out. I want the line/arrow to behave like a control/component whose attributes I can change. Is that possible?

[ebalci]

Letty,

What kind of attributes are you referring to?

If you need to change the size programmatically; 

- Start with an arrow picture you draw using IrfanView and save it as PNG with a transparent background.

- Put a picture control on your UI and set it to resize the picture according to control size

- Make the background of the picture control transparent using the color palette of CVI user interface editor.

- Assign the picture file of control as the file you saved in IrfanView.

Hope this helps,