Picture columns

Showing bitmaps in data cells depending on the field values

TDBGridEh allows to show bitmaps from TImageList component depending on the field values. In order to show bitmaps you need fill list Column.KeyList property by the possible field values (every value in the separated line) and set Column.ImageList property by the TImageList control that has the bitmaps. Every image in ImageList corresponds to the string line in the KeyList property. You can also set Column.NotInKeyListIndex property to the index of bitmap that will be shown if the field's value does not correspond to any value in the KeyList (for instance you can set index of image for Null field value). At run time you can’t edit cells with bitmaps. Use SPACE key or mouse click to set value from next line of Column.KeyList to the field. Use Shift+SPACE key or Shift+Mouse click to set value from previous line Column.KeyList. You can also set Column.DblClickNextval to True to allow changing values in cell by double mouse clicking.

Use Column.ShowImageAndText property to allow display text and picture in the cell. When Column.ShowImageAndText = False and Column.ImageList is assigned then grid will draw only picture from ImageList.
If the next properties are filled: Column.ImageList, Column.KeyList Column.PickList and Column.ShowImageAndText = True, then each column cell will work as combobox KeyList type and a each entry cell will show a picture of the ImageList.
Use the event TColumnEh.OnGetCellParams to specify a particular image index for pictures from ImageList. In the event handler, set Params.ImageIndex parameter value depending on the values of the fields of the current record, or other conditions.