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Size of chart elements
Posted: Tue Oct 05, 2021 9:29 am
by 16591932
Hi,
I'm trying to understand the vertical alignments of the various elements that make up the chart. At run time it is possible to get the size in pixels the height of the top and bottom margins, the chart title, the axes titles, the chart rectangle itself, and the legend. But I can't see how to get the height occupied by the axis labelling. Is there a property that returns this?
Re: Size of chart elements
Posted: Tue Oct 05, 2021 1:28 pm
by yeray
Hello,
I did an example trying to show all the heights involved in a simple chart:
- Project1_2021-10-05_15-23-07.png (19.6 KiB) Viewed 4021 times
Code: Select all
uses Series;
type TCustomTeePanelAccess=class(TCustomTeePanel);
procedure TForm1.FormCreate(Sender: TObject);
begin
Chart1.View3D:=False;
Chart1.Legend.Hide;
Chart1.Gradient.Visible:=False;
Chart1.Color:=clWhite;
Chart1.Walls.Back.Gradient.Visible:=False;
Chart1.Walls.Back.Color:=clWhite;
Chart1.AddSeries(TBarSeries).FillSampleValues;
RecalcHeights;
end;
procedure TForm1.RecalcHeights;
var total: Integer;
procedure AddValue(const title: String; const AValue: Integer);
begin
Inc(total, AValue);
Memo1.Lines.Add(title + ': ' + IntToStr(AValue) + ', Subtotal: ' + IntToStr(total));
end;
begin
Chart1.Draw;
Memo1.Clear;
Memo1.Lines.Add('*** Heights ***');
Memo1.Lines.Add('Total Chart: ' + IntToStr(Chart1.Height));
Memo1.Lines.Add('');
total:=0;
AddValue('BorderSize', TCustomTeePanelAccess(Chart1).BorderSize);
if (Chart1.MarginUnits = muPixels) then
AddValue('Margin Top', Chart1.MarginTop)
else
AddValue('Margin Top', Chart1.Height*Chart1.MarginTop div 100);
AddValue('Title', Chart1.Title.Height);
AddValue('Title Margin', Chart1.Title.VertMargin);
AddValue('ChartRect', Chart1.ChartRect.Height);
with Chart1.Axes.Bottom do
begin
AddValue('Bottom Axis Ticks Margin', Axis.Width+1);
AddValue('Bottom Axis Ticks', TickLength);
AddValue('Bottom Axis Labels', Abs(LabelsFormat.Height));
end;
if (Chart1.MarginUnits = muPixels) then
AddValue('Margin Bottom', Chart1.MarginBottom)
else
AddValue('Margin Bottom', Chart1.Height*Chart1.MarginBottom div 100);
AddValue('BorderSize', TCustomTeePanelAccess(Chart1).BorderSize);
end;