Panel and custom control Key events

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Peder Y - 26 Feb 2005 12:49 GMT

1) How can I make a Panel fire Key events?

Neither overriding the OnKeyUp event nor somePanel.KeyUp += new
KeyEventHandler(somePanel_KeyUp) seems to work.

2) What would be the procedure for doing this on a Control derived control?

Thanks!

- Peder -

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Andrew Smith \(Infragistics\) - 26 Feb 2005 20:16 GMT

A panel control doesn't take focus - only the control with the input focus
will receive key events. For example, if your panel contains a textbox and
it is focused, then the key events of the textbox will be invoked - the same
would go for any control that has the focus.

> 1) How can I make a Panel fire Key events?
>
[quoted text clipped - 7 lines]
>
> - Peder -

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Peder Y - 26 Feb 2005 23:14 GMT

I figured out that a custom control need to call the Focus() function
for key events to fire.

Now, the strange thing that happens is that the KeyDown event does not
fire when the arrow keys or DEL is pressed. Is this the way it's
supposed to be?

Thanks!

- Peder -

> 2) What would be the procedure for doing this on a Control derived control?
>
> Thanks!
>
> - Peder -

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Andrew Smith \(Infragistics\) - 27 Feb 2005 21:07 GMT

Like I said in my response to your original email, the control with the
input focus receives the key messages. With regards to this post, override
IsInputKey and return true for the keys that are considered input for the
control.

>I figured out that a custom control need to call the Focus() function for
>key events to fire.
[quoted text clipped - 13 lines]
>>
>> - Peder -

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Peder Y - 24 Mar 2005 20:16 GMT

...can one in a similar manner override something to make a panel
receive focus?

Andrew Smith (Infragistics) wrote:

> Like I said in my response to your original email, the control with the
> input focus receives the key messages. With regards to this post, override
[quoted text clipped - 18 lines]
>>>
>>>- Peder -

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Andrew Smith \(Infragistics\) - 27 Mar 2005 20:22 GMT

You could use the SetStyle(ControlStyles.Selectable, true) method but I'm
curious as to why you would want to do that with a panel? I mean what is the
point of having a container control receive focus? When a child control (or
any other control for that matter) get focus, you will still not receive key
events on the container.

> ...can one in a similar manner override something to make a panel receive
> focus?
[quoted text clipped - 22 lines]
>>>>
>>>>- Peder -

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Peder Y - 28 Mar 2005 22:54 GMT

...because I draw stuff using a Panel as a canvas. When I click the
panel, my graphical objects get "selected", meaning they redraw
themselves as selected. I can move them around and resize them with the
mouse. I want to be able to move them around using the arrow keys, and
resize them using ctrl+arrow as well. Maybe there's a better approach to
this like creating my own ScrollableControl? I just wouldn't go there if
I didn't have to.

- Peder -

Andrew Smith (Infragistics) wrote:

> You could use the SetStyle(ControlStyles.Selectable, true) method but I'm
> curious as to why you would want to do that with a panel? I mean what is the
[quoted text clipped - 29 lines]
>>>>>
>>>>>- Peder -

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Panel and custom control Key events

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