rwhitaker
asked on
DBGRID Experts, Please answer this TAB question
I have a dbgrid with approximately 12 fields from one table. I turn some of these columns.ReadOnly properties to True and then depending on the situation I will turn them back to False.
What my problem is, is that it seems that once my readonly property for a column has been set to True, it never can be tabbed into, even if I set the ReadOnly property back to False. I can use the arrow keys to get to that column, but Tab will not work. If the column starts out to be ReadOnly = False then I can tab to it, but like I said as soon as I turn the ReadOnly property to True (this is in code by the way, not design time) I can never tab to it.
Any ideas???
What my problem is, is that it seems that once my readonly property for a column has been set to True, it never can be tabbed into, even if I set the ReadOnly property back to False. I can use the arrow keys to get to that column, but Tab will not work. If the column starts out to be ReadOnly = False then I can tab to it, but like I said as soon as I turn the ReadOnly property to True (this is in code by the way, not design time) I can never tab to it.
Any ideas???
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kretzschmar
? why not set the underlying tfield to readonly instead?
To meikl,
I tried it before with the same result. It can't tab if TField.Readonly = true like for Column.Readonly=true. The problem is inside TDBGrid:
unit dbgrids
line 3462.
----
if TabStops[ACol] then
begin
MoveCol(ACol, 0);
Exit;
end;
----
it explain why it don't tab.
line 4098
----
procedure TCustomDBGrid.SetColumnAtt
var
I: Integer;
begin
for I := 0 to FColumns.Count-1 do
with FColumns[I] do
begin
TabStops[I + FIndicatorOffset] := Showing and not ReadOnly and DataLink.Active and
Assigned(Field) and not (Field.FieldKind = fkCalculated) and not ReadOnlyField(Field);
ColWidths[I + FIndicatorOffset] := Width;
end;
if (dgIndicator in Options) then
ColWidths[0] := IndicatorWidth;
end;
-----
there you can see how TabStops[I] becam "false" if TField.ReadOnly = true.
------
Cheers,
Igor.
I tried it before with the same result. It can't tab if TField.Readonly = true like for Column.Readonly=true. The problem is inside TDBGrid:
unit dbgrids
line 3462.
----
if TabStops[ACol] then
begin
MoveCol(ACol, 0);
Exit;
end;
----
it explain why it don't tab.
line 4098
----
procedure TCustomDBGrid.SetColumnAtt
var
I: Integer;
begin
for I := 0 to FColumns.Count-1 do
with FColumns[I] do
begin
TabStops[I + FIndicatorOffset] := Showing and not ReadOnly and DataLink.Active and
Assigned(Field) and not (Field.FieldKind = fkCalculated) and not ReadOnlyField(Field);
ColWidths[I + FIndicatorOffset] := Width;
end;
if (dgIndicator in Options) then
ColWidths[0] := IndicatorWidth;
end;
-----
there you can see how TabStops[I] becam "false" if TField.ReadOnly = true.
------
Cheers,
Igor.
hi igor, rwhitaker,
try this
//toggle some fields on/off
procedure TForm1.Button1Click(Sender
begin
Table1.Fields[0].ReadOnly := not Table1.Fields[0].ReadOnly;
Table1.Fields[3].ReadOnly := not Table1.Fields[3].ReadOnly;
Table1.Fields[4].ReadOnly := not Table1.Fields[4].ReadOnly;
Table1.Fields[7].ReadOnly := not Table1.Fields[7].ReadOnly;
end;
no problem with the TAB
meikl
try this
//toggle some fields on/off
procedure TForm1.Button1Click(Sender
begin
Table1.Fields[0].ReadOnly := not Table1.Fields[0].ReadOnly;
Table1.Fields[3].ReadOnly := not Table1.Fields[3].ReadOnly;
Table1.Fields[4].ReadOnly := not Table1.Fields[4].ReadOnly;
Table1.Fields[7].ReadOnly := not Table1.Fields[7].ReadOnly;
end;
no problem with the TAB
meikl
sorry,
had misread the question,
igor you're right
meikl
had misread the question,
igor you're right
meikl
ASKER
I fixed my problem a little differently than this proposed solution, but it is pretty close to your answer. Thanks for the help.
What I did was to Reset the readonly properties of the columns back to what they are in design mode and then load the form. This seems to fix my problem.
What I did was to Reset the readonly properties of the columns back to what they are in design mode and then load the form. This seems to fix my problem.