1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
var
Form1: TForm1;
Brush : TStrokeBrush;
MousePos : TPointF;
bFlagDraw : Boolean;
[...]
procedure TForm1.FormMouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Single);
begin
bFlagDraw := False;
end;
procedure TForm1.Panel1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Single);
var
MouseService: IFMXMouseService;
begin
bFlagDraw := False;
with Canvas do
begin
if TPlatformServices.Current.SupportsPlatformService(IFMXMouseService, IInterface(MouseService)) then
begin
//On initialise la position de la souris
MousePos := MouseService.GetMousePos;
bFlagDraw := True;
end;
end;
end;
procedure TForm1.Panel1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Single);
var
MouseService: IFMXMouseService;
begin
if ssLeft in Shift then
begin
if bFlagDraw then
begin
Brush := TStrokeBrush.Create(TBrushKind.Solid, TAlphaColors.Black);
Brush.Thickness:= 2;
if TPlatformServices.Current.SupportsPlatformService(IFMXMouseService, IInterface(MouseService)) then
begin
with Canvas do
begin
BeginScene;
DrawLine(MousePos, MouseService.GetMousePos, 1, Brush);
EndScene;
//On réinitialise la position de la souris
MousePos := MouseService.GetMousePos;
end;
end;
end;
end
else
if bFlagDraw then bFlagDraw := false;
end; |
