I was using Teechart v7 so far but now we bought version 8.
I have some charts with logarithmic bottom axis (choose between log or lin) and in version 7 I set Logarithmic to true and if I delete all BottomAxis.Items (clear) and set increment to 0 everything works ok. Now in version 8 this doesn't work anymore.
On zoom/undo zoom I am redrawing scale using code (RedrawGrid on Zoom/UndoZoom)
Code: Select all
with Chart.BottomAxis do
begin
tmpIncrement := Abs(Minimum - Maximum)/10;
Items.Clear;
tmpValue:=Minimum;
while tmpValue <= Maximum do
begin
with Items.Add(tmpValue) do
begin
Text := Format('%5.2f' ,[tmpValue]);
Font.Color := clSilver;
end;
tmpValue:=tmpValue+tmpIncrement;
end;
if FFFTXScaleType = atLog then
Items.Clear;
end;
with Chart.LeftAxis do
begin
tmpIncrement := Abs(Minimum - Maximum)/10;
Items.Clear;
tmpValue:=Minimum;
while tmpValue <= Maximum do
begin
with Items.Add(tmpValue) do
begin
Text := Format('%5.2f' ,[tmpValue]);
Font.Color := clSilver;
end;
tmpValue:=tmpValue+tmpIncrement;
end;
end;
Code: Select all
Title.Caption := 'Frequency (Hz)';
Logarithmic := true;
MinorTickCount := 8;
MinorGrid.Visible := true;
MinorGrid.Style := psDot;
MinorGrid.Color := clGray;
Grid.Style := psDot;
AxisValuesFormat := '00e-0';
LabelsExponent := true;
FMin := 0;
FMax := 1e6;
SetMinMax(FMin, FMax);
Increment := 0;
Thank you for your help.
is not visible for bottom axis although the source code is the same as for fist video (TeeChar 7).
It works fine in both version implementing RedrawGrid as shown below. That is removing all bottom axis related code. The problem is this:
but it does in v8. Therefore you don't see any logarithmic label in v8. Can you please check if code below works fine at your end?