Mega Code Archive
Display the items in a listview control display as a group [xp]
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// declarations from commctrl.h
type
TLVGROUP = record
cbSize: UINT;
mask: UINT;
pszHeader: LPWSTR;
cchHeader: Integer;
pszFooter: LPWSTR;
cchFooter: Integer;
iGroupIdL: Integer;
stateMask: UINT;
state: UINT;
uAlign: UINT;
end;
tagLVITEMA = packed record
mask: UINT;
iItem: Integer;
iSubItem: Integer;
state: UINT;
stateMask: UINT;
pszText: PAnsiChar;
cchTextMax: Integer;
iImage: Integer;
lParam: lParam;
iIndent: Integer;
iGroupId: Integer;
cColumns: UINT;
puColumns: PUINT;
end;
TLVITEMA = tagLVITEMA;
const
LVM_ENABLEGROUPVIEW = LVM_FIRST + 157;
LVM_MOVEITEMTOGROUP = LVM_FIRST + 154;
LVM_INSERTGROUP = LVM_FIRST + 145;
LVIF_GROUPID = $0100;
LVGF_HEADER = $00000001;
LVGF_ALIGN = $00000008;
LVGF_GROUPID = $00000010;
LVGA_HEADER_LEFT = $00000001;
LVGA_HEADER_CENTER = $00000002;
LVGA_HEADER_RIGHT = $00000004;
procedure TForm1.Button1Click(Sender: TObject);
var
LvGroup: TLVGROUP;
LvItemA: TLVITEMA;
ListItem: TListItem;
I: Byte;
begin
// Fill listview with random data
Randomize;
for i := 1 to 10 do
begin
ListItem := ListView1.Items.Add;
ListItem.Caption := IntToStr(Random(100));
end;
SendMessage(ListView1.Handle, LVM_ENABLEGROUPVIEW, 1, 0);
// Create Group1
FillChar(LvGroup, SizeOf(TLVGROUP), 0);
with LvGroup do
begin
cbSize := SizeOf(TLVGROUP);
mask := LVGF_HEADER or LVGF_ALIGN or LVGF_GROUPID;
pszHeader := 'Group 1';
cchHeader := Length(LvGroup.pszHeader);
iGroupIdL := 0;
uAlign := LVGA_HEADER_CENTER;
end;
SendMessage(ListView1.Handle, LVM_INSERTGROUP, 0, Longint(@LvGroup));
// Create Group2
FillChar(LvGroup, SizeOf(LvGroup), 0);
with LvGroup do
begin
cbSize := SizeOf(TLVGROUP);
mask := LVGF_HEADER or LVGF_ALIGN or LVGF_GROUPID;
pszHeader := 'Group 2';
cchHeader := Length(LvGroup.pszHeader);
iGroupIdL := 1;
uAlign := LVGA_HEADER_LEFT
end;
SendMessage(ListView1.Handle, LVM_INSERTGROUP, 1, Longint(@LvGroup));
// Assign items to the groups
for I := 0 to ListView1.Items.Count - 1 do
begin
with LvItemA do
begin
FillChar(LvItemA, SizeOf(TLvItemA), 0);
mask := LVIF_GROUPID;
iItem := I;
iGroupId := Random(2);
end;
SendMessage(ListView1.Handle, LVM_SETITEM, 0, Longint(@LvItemA))
end;
end;
// XPManifest needed!
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