Problem with Delphi 10.3 Community PaintBox Repaint-Function - windows

Question

I am currently making a little Program in Delphi 10.3 Community Version 26.0.34749.6593. No additional components.
Essentially I draw on TPaintBox which is fitted in a Panel. Everything works fine so far, but when the objects are repainted via "PaintBox1.Repaint" the Objects got the wrong BrushStyle (bsSolid when they should have bsClear e.g.) Of course I tried to pin it down, but I got no luck. But I found out that at the following Point something doesn't work:
procedure TForm1.PaintBox1Paint(Sender: TObject);
var
i: Integer;
fig : ^TFigure;
apen: TPenStyle;
abrush: TBrushStyle;
color1,color2: TColor;
begin
aPen := PaintBox1.Canvas.Pen.Style;
aBrush := bsStyle;
color1 := PaintBox1.Canvas.Brush.Color;
color2 := PaintBox1.Canvas.Pen.Color;
for I:=0 to List.Count-1 do
begin
fig := List.Items[i];
case fig.Typ of
f_Kreis : begin
with Paintbox1.Canvas do
begin
pen.Style := fig.Pen;
Brush.Style := fig.Brush;
pen.Color := fig.PenColor;
brush.Color := fig.BrushColor;
Ellipse(fig.X,fig.Y,fig.X2,fig.Y2);
end;
end;
f_Rechteck : begin
with PaintBox1.Canvas do
begin
Pen.Style := fig.Pen;
Brush.Style := fig.Brush;
Pen.Color := fig.PenColor;
Brush.Color := fig.BrushColor;
Rectangle(fig.X,fig.Y,fig.X2,fig.Y2);
end;
end;
f_Line : begin
with PaintBox1.Canvas do
begin
pen.Style := fig.Pen;
brush.Style := fig.Brush;
pen.Color := fig.PenColor;
brush.Color := fig.BrushColor;
MoveTo(fig.X,Fig.Y);
LineTo(fig.X2,fig.Y2);
end;
end;
end;
end;
PaintBox1.Canvas.Pen.Style := aPen;
bsStyle := aBrush;
PaintBox1.Canvas.Brush.Color := color1;
PaintBox1.Canvas.Pen.Color := color2;
end;
So when the "Brush.Style := fig.Brush;"-Line is called, nothing happens. I went step by step and after these Line "Brush.Style" is still "bsSolid" even when "fig.Brush" is "bsClear"
For explanation: TFigure is my own class. It houses information about a drawing, such as a rectangle. It is the parent class.
Do I miss something. I really am out of Ideas. Can anyone tell me, why nothing happens?
Edit:
For testing I added the lines:
if Brush.Style <> fig.Brush then
ShowMessage('Warnung!');
under
Brush.Style := fig.Brush;
and it actually wont set it on false, though Brush.Style is bsSolid and fig.Brush is bsClear.

Answer 1

You have declared fig : ^TFigure;, but class instances are already references (pointers). Thus you are creating a pointer to reference, and using that pointer as if it were the reference.
Remove the pointer operator and declare
fig: TFigure;
I can't verify whether there are other errors in your code