Cursor styles, c#

Hello,

Is there a way to set the cursor in c#?

I've been trying to implement a conditional cursor by creating a cursor object and then assigning the type (ie. cur = Cursors.Hand) but I have not been successful in having it render in the viewport.

Does anyone have a piece of sample code that they would mind sharing or provide advice or suggestions to help? Maybe there is a cursor override that I don't know about or should I explore tool tips? Tool tips appeared not to control the style (for example - a hand cursor) but rather enable a text interface - I think.

Replies to This Discussion

Permalink Reply by David Rutten on August 3, 2015 at 2:46am

Cursors are assigned per control usually. So for which control do you want to modify the cursor? Rhino viewport? GH canvas? A control on your own form?

Permalink Reply by Tree on August 3, 2015 at 8:27am

David,

The rhino viewport. Any help about where I find access to and set the viewport cursor is appreciated.

Permalink Reply by David Rutten on August 3, 2015 at 8:52am

Ah, I do not know if (and how) you can change the cursor of the Rhino viewports via RhinoCommon. You'll have to ask on our discourse forum where all the SDK developers hang out.

Permalink Reply by Tree on August 3, 2015 at 9:41am

Thanks David - Will give it a go.

Permalink Reply by Tree on August 14, 2015 at 9:49am

David,

A need had arisen for understanding more about cursor styles in the canvas environment.

As per above I'm interested in generating a mouse over that transforms the cursor to a hand. Where should I start to look for examples (if they exist).

The mouse over will work with a button on a component.

Permalink Reply by David Rutten on August 16, 2015 at 5:03am

If you're dealing with .NET controls then assigning cursors can be done via regular .NET framework methods, however I simplified the process with the GH_CursorServer class. This static class loads all cursor files (*.cur) from a folder and then you can assign them to controls by name.

Call this when your plugin loads:

Grasshopper.GUI.GH_CursorServer.ReferenceCursors(myFolderWithCursors);

And then at runtime:

Grasshopper.GUI.GH_CursorServer.AttachCursor(canvas, "Hand");

...

Grasshopper.GUI.GH_CursorServer.ResetCursor(canvas);

You can also use the already existing hand cursor that comes with Grasshopper then call AttachCursor with "GH_HandPan".

Permalink Reply by David Rutten on August 16, 2015 at 5:05am

Incidentally you can turn regular images into *.cur files with the free Paint.NET app.

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