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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
function MyListViewWndProc(p1: HWND; p2: UINT; p3: WPARAM; p4: LPARAM): LRESULT;
var
ParentH : HWND;
M : TMessage;
Buffer : IntPtr;
Begin
ParentH := GetParent(p1);
if (ParentH = 0) or (ParentH = p1) then begin
Result := 1;
Exit;
End;
M.Msg := p2;
M.WParam := p3;
M.LParam := p4;
Buffer := Marshal.AllocHGlobal(Marshal.SizeOf(TypeOf(TObject(p3))));
try
Marshal.StructureToPtr(TObject(p3), Buffer, False);
Result := SendMessage(ParentH, PM_HEADERMSG, longint(p3), 0);
finally
Marshal.DestroyStructure(Buffer, TypeOf(LParam));
Marshal.FreeHGlobal(Buffer);
end;
end;
constructor TsListView.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
Header := 0;
HeaderWndProc := 0;
ViewStyle := vsReport;
FixedColor := clBtnFace;
end;
procedure TsListView.ChangeHeaderWndProc(var Msg: TMessage);
begin
CMRecreateWnd(Msg);
If (Parent <> nil) Then Begin
Header := FindWindowEx(Handle, 0, 'SysHeader32', nil);
If Header = 0 Then Exit;
HeaderWndProc := GetWindowLong(Header, GWL_WNDPROC);
SetWindowLong(Header, GWL_WNDPROC, @MyListViewWndProc);
End;
end;
procedure TsListView.CMRecreateWnd(var Message: TMessage);
begin
If Header <> 0 Then Begin
If HeaderWndProc <> 0 Then
SetWindowLong(Header, GWL_WNDPROC, HeaderWndProc);
Header := 0;
HeaderWndProc := 0;
End;
end;
procedure TsListView.HeaderMessage(var Msg: TMessage);
begin
Msg.Result := CallWindowProc(IntPtr(HeaderWndProc), Header, Msg.Msg, Msg.WParam, Msg.LParam);
If Msg.Msg = WM_PAINT Then
DrawButtons;
end;
procedure TsListView.DrawButtons;
Var
DC : HDC;
Bounds : TRect;
Border1,
Border2 : Integer;
I, X : Integer;
Canvas : TCanvas;
Begin
If Header = 0 Then Exit;
FFixedColor := clblue;
Windows.GetClientRect(Header, Bounds);
Border1 := GetSystemMetrics(SM_CXBORDER);
Border2 := GetSystemMetrics(SM_CXFIXEDFRAME) - Border1;
DC := GetDC(Header); X := 0;
Canvas := TCanvas.Create;
Canvas.Handle := DC;
Canvas.Brush.Color := FFixedColor;
For I := 0 To Columns.Count - 1 Do Begin
Canvas.FillRect(Rect(X + Border1, Border1,
X + Columns[I].Width - Border2,
Bounds.Bottom - Border2));
Canvas.TextOut(X + Border2, Border2, Columns[I].Caption);
X := X + Columns[I].Width;
End;
Canvas.FillRect(Rect(X + Border1, Border1, Bounds.Right, Bounds.Bottom - Border2));
Canvas.Free;
End;
procedure TsListView.SetFixedColor(const Value: TColor);
begin
FFixedColor := clblue;
DrawButtons;
end;
procedure TsListView.CreateHandle;
begin
inherited;
If Parent <> nil Then
PostMessage(Handle, PM_CHANGEPROC, 0, 0);
end;
function TsListView.get_CheckedCount: Integer;
var
cpt: integer;
begin
Result := 0;
cpt := 0;
while (cpt < Items.Count) do begin
Inc(Result, Ord(Items[cpt].Checked));
Inc(cpt);
end;
end; |
Comment modifier la couleur du header du TListView ?
Répondre avec citation
Tutoriel : 
)d'utiliser directement le canvas...
Partager