Hello Lazarus-List,

Maybe somebody had noted that all keys that perform some action in a DBGrid by default are never passed to the KeyPress event, like return, delete, keyup, keydown,... The reason is that this actions are handled in the keydown event and to note that they are handled by the DBGrid the "Key" variable is set to zero which finally prevent the right key value to be handled by "KeyPress" as zero is "invalid".

I had fixed it in my local copy using the "CanGridHandleKey" but also in "Grids" (TCustomGrid) some keys are handled to perform default operations and when performed the "Key" is set to zero also. I think they can be safelly removed, the zero setting, but I wish to know if somebody is aware of the reason to set them to zero.

If I do not get feedback in 2 or 3 days I'll post the patch in the bugtracker to propose a solution to this problem.

Although I have no particular need for this change, I support it on the general principle. I would go even further and call KeyPress _before_ built-in handler, so that user code could turn off default handling by setting the key code to zero.

Hello Lazarus-List,

Sunday, March 7, 2010, 4:12:59 AM, you wrote:

AK> Although I have no particular need for this change, I support it AK> on the general principle. I would go even further and call KeyPress AK> _before_ built-in handler, so that user code could turn off AK> default handling by setting the key code to zero.

I'm not sure that I undertand your answer (my english is quite limited). The "desired" behavior is that if user handles KeyDown, KeyPress or KeyUp no default actions are taken ?

I think that that behavior is only possible in OnKeyDown as the others are too late. Current problem is that the internal grid checks destroys key information so any key handled will not be reported in the KeyPress.

I'll try to modify code to accept overriding by users handle, but without destroying "Key" value. I hope no unexpected side effects happend.

That IMO should be standard behaviour. First let the user handle the key events, and proceed with the returned key code.

DoDi

Yes, this is what I wanted to say.