TStringGrid: which event fires when checkbox is changed?

[wimpie]

Hi

I have a stringgrid containing a column of checkboxes. Which event does one use to be informed of boxes that have been checked/unchecked?

[LazaruX]

You can use something like OnChange and then check if the checkbox is in the status you wished

[wimpie]

I don't think TStringGrid has an OnChange event. There are OnChange events for properties such as BorerSpacing and Constraints.

There is OnEditingDone, but it doesn't fire for the checkbox cells.

[jesusr]

Right, the grid didn't have a easy way to detect checkbox toggle, in Lazarus 23510 I have added a new event: OnCheckboxToggled it has an aState argument that indicates what was the final state of checkbox, this event is triggered for currently cell, ie, grid.col, grid.row.

[wimpie]

Thank you. It helps me a lot.

I think it will be better if the Col and Row is also passed as parameters. It will reduce the code in the handler and be in line with the other grid events. But it is not critical. I will log a feature request on mantis.

Thanks again.

[Bitbeisser]

Right, the grid didn't have a easy way to detect checkbox toggle, in Lazarus 23510 I have added a new event: OnCheckboxToggled it has an aState argument that indicates what was the final state of checkbox, this event is triggered for currently cell, ie, grid.col, grid.row.

I know the post is more than 12 years old, but did this ever make it into an official release of Lazarus? I have the same problem right now where I would need to get an event fired up when the checkbox in the first column of a tStringGrid gets changed. But overall documentation of the use of those checkboxes is rather thin in general and there is no event shown in the Object Inspector for either the column or the cell with the checkbox(es)...

PS: Never mind, I think I found it. tStringgrid.OnCheckBoxToggled seems to be what I was looking for...