MaxLogicFoundation/AutoHourGlass.pas at main · MaxLogic/MaxLogicFoundation · GitHub

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
60
61
62
63
Unit AutoHourGlass;

{ Copyright: Pawel Piotrowski; MaxLogic; www.maxlogic.eu
  License: free to use; no warranty at all; use as is

  How to use:

  var
  Glass : IInterface;
  begin
  Glass := AutoHourGlass.MakeCHG;
  ....
  end;

  thats alll

}
Interface

Uses
  winApi.Windows, system.Classes, system.SysUtils, vcl.Forms, vcl.Controls, vcl.Graphics;

Type
  TAutoHourGlass = Class(TInterfacedObject)
  Private
    fCursor: TCursor;
    fCaptured: Boolean;
  Public
    Constructor Create;
    Destructor Destroy; Override;

  End;

Function MakeCHG: IInterface;

Implementation

Function MakeCHG: IInterface;
Begin
  Result := TAutoHourGlass.Create;
End;

{ TAutoHourGlass }

Constructor TAutoHourGlass.Create;
Begin
  Inherited;
  If screen.cursor <> crHourGlass Then
  Begin
      fCaptured := True;
    fCursor := screen.cursor;
    screen.cursor := crHourGlass;
  End;
End;

Destructor TAutoHourGlass.Destroy;
Begin
  If fCaptured Then
    screen.cursor := fCursor;
  Inherited;
End;

End.