Adding a button to DBGrid Title row at draw time
lazarus / 16-Databases

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daveinhull · 2018-12-28 15:56

Hi,

Could someone point me in the right direction on how to add a button
to the title columns in a DBGrid (I want to add a filter button to
each column) at draw time.

I know how to add custom controls to fields, but can't quite figure
out how to only add a control to the title row. I'm guessing it's
easy, just need a pointer in the right direction,

Thanks
Dave

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garlar27 · 2018-12-28 16:37

Don't know if possible.
The only thing I can think of is using OnDrawColumnCell to draw a
Button on the title cell and OnTitleClick to implement the action.

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daveinhull · 2018-12-28 17:48

Hi garlar77,

Thanks for the pointer, I'll give that a go although can't I use the
OnClick event of the button to do what I need?

Just one other quick question, how can I detect if it is the Title
Cell, whiuch was my real query as I only know how to draw cells on all
row?

Thanks.

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lucamar · 2018-12-28 18:10

Quote from: daveinhull on December 28, 2018, 06:48:42 pmJust one other
quick question, how can I detect if it is the Title Cell, whiuch was
my real query as I only know how to draw cells on all row?

Use DBGrid.CellToGridZone(). The result type is declared in grids.pas
as:
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i type
TGridZone = (  gzNormal,               gzFixedCols,           
gzFixedRows,            gzFixedCells,           gzInvalid            
);

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daveinhull · 2018-12-28 18:41

Many thanks lucamar

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daveinhull · 2018-12-29 14:31

Hi,

So CellToGridZone requires two parameters, Col (which I can get) and
Row which I'm not sure how I get? I thought about using the dataset
row, but of course that doesn't indicate a header row! Any pointers?

Dave

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daveinhull · 2018-12-31 00:42

Anyone??