Mega Code Archive
How to change the Z order of you controls during runtime
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Title: How to change the Z-order of you controls during runtime
procedure ChangeControlZOrder(Sender: TObject; MoveUp: Boolean = True);
var
I, Curr: Integer;
Control: TControl;
List: TList;
begin
if Sender is TControl then
begin
// only components of type TControl and descendends
// work
Control := Sender as TControl;
// has no parent, cannot move ;-)
if Control.Parent = nil then
// quit
Exit;
// determine position in z-order
Curr := -1;
for I := 0 to Pred(Control.Parent.ControlCount) do
if Control.Parent.Controls[I] = Sender then
begin
Curr := I;
Break;
end;
if Curr 0 then
// position not found, quit
Exit;
List := TList.Create;
try
if MoveUp then
begin
for I := Curr + 2 to Pred(Control.Parent.ControlCount) do
// load other controls in group
List.Add(Control.Parent.Controls[I]);
Control.BringToFront;
for I := 0 to Pred(List.Count) do
// move other controls to front, too
TControl(List[I]).BringToFront;
end else begin
for I := 0 to Curr - 2 do
// load other controls in group
List.Add(Control.Parent.Controls[I]);
Control.SendToBack;
for I := Pred(List.Count) downto 0 do
// move other controls to back, too
TControl(List[I]).SendToBack;
end;
finally
List.Free;
end;
end;
end;
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