我需要在一個TListView
特定列畫一個複選框,所以我檢查這個問題How can I setup TListView with CheckBoxes in only certain columns?
和接受的答案建議使用此另一個問題How to set a Checkbox TStringGrid in Delphi?
描述的方法,現在移植該代碼有一個ListView工作,我帶着這樣的:繪製一個複選框在TListView的
procedure TForm15.ListView1CustomDrawSubItem(Sender: TCustomListView; Item: TListItem; SubItem: Integer; State: TCustomDrawState; var DefaultDraw: Boolean);
const
PADDING = 4;
var
h : HTHEME;
s : TSize;
r : TRect;
Rect : TRect;
i : Integer;
Dx : Integer;
begin
if (SubItem=1) then
begin
DefaultDraw:=True;
Rect :=Item.DisplayRect(drBounds);
Dx:=0;
for i := 0 to SubItem do
Inc(Dx,Sender.Column[i].Width);
Rect.Left :=Rect.Left+Dx;
Rect.Right :=Rect.Left+Sender.Column[SubItem+1].Width;
FillRect(Sender.Canvas.Handle, Rect, GetStockObject(WHITE_BRUSH));
s.cx := GetSystemMetrics(SM_CXMENUCHECK);
s.cy := GetSystemMetrics(SM_CYMENUCHECK);
if UseThemes then
begin
h := OpenThemeData(Sender.Handle, 'BUTTON');
if h <> 0 then
try
GetThemePartSize(h, Sender.Canvas.Handle, BP_CHECKBOX, CBS_CHECKEDNORMAL, nil, TS_DRAW, s);
r.Top := Rect.Top + (Rect.Bottom - Rect.Top - s.cy) div 2;
r.Bottom := r.Top + s.cy;
r.Left := Rect.Left + PADDING;
r.Right := r.Left + s.cx;
DrawThemeBackground(h, Sender.Canvas.Handle, BP_CHECKBOX, IfThen(CompareText(Item.SubItems[1],'True')=0, CBS_CHECKEDNORMAL, CBS_UNCHECKEDNORMAL), r, nil);
finally
CloseThemeData(h);
end;
end
else
begin
r.Top := Rect.Top + (Rect.Bottom - Rect.Top - s.cy) div 2;
r.Bottom := r.Top + s.cy;
r.Left := Rect.Left + PADDING;
r.Right := r.Left + s.cx;
DrawFrameControl(Sender.Canvas.Handle, r, DFC_BUTTON, IfThen(CompareText(Item.SubItems[1],'True')=0, DFCS_CHECKED, DFCS_BUTTONCHECK));
end;
//r := Classes.Rect(r.Right + PADDING, Rect.Top, Rect.Right, Rect.Bottom);
// DrawText(Sender.Canvas.Handle, StringGrid1.Cells[ACol, ARow], length(StringGrid1.Cells[ACol, ARow]), r, DT_SINGLELINE or DT_VCENTER or DT_LEFT or DT_END_ELLIPSIS);
end
else
DefaultDraw:=False;
end;
,但我在試圖繪製一個複選框:(慘遭失敗,有人可以點我在正確的方向繪製在ListView的複選框,(代碼做不在列表視圖中繪製任何複選框)
listview在vsR eport模式,並有3列,我想把複選框在第三列。請不要建議使用第三方組件,我想使用TlistView控件。
UPDATE 1:感謝sertac recomendattion設置DefaultDraw
值現在複選框顯示,但其他列看起來不太好。
更新2,繼安德烈亞斯建議列表視圖現在看起來更好,但仍顯示黑盒;
procedure TForm15.ListView1CustomDrawSubItem(Sender: TCustomListView; Item: TListItem; SubItem: Integer; State: TCustomDrawState; var DefaultDraw: Boolean);
var
h : HTHEME;
s : TSize;
r : TRect;
Rect : TRect;
i : Integer;
Dx : Integer;
begin
if (SubItem=2) then
begin
DefaultDraw:=False;
Rect :=Item.DisplayRect(drBounds);
Dx:=0;
for i := 0 to SubItem-1 do
Inc(Dx,Sender.Column[i].Width);
Rect.Left :=Rect.Left+Dx;
Rect.Right :=Rect.Left+Sender.Column[SubItem].Width;
FillRect(Sender.Canvas.Handle, Rect, GetStockObject(WHITE_BRUSH));
s.cx := GetSystemMetrics(SM_CXMENUCHECK);
s.cy := GetSystemMetrics(SM_CYMENUCHECK);
Dx := (Sender.Column[SubItem].Width-GetSystemMetrics(SM_CXMENUCHECK)) div 2;
if UseThemes then
begin
h := OpenThemeData(Sender.Handle, 'BUTTON');
if h <> 0 then
try
GetThemePartSize(h, Sender.Canvas.Handle, BP_CHECKBOX, CBS_CHECKEDNORMAL, nil, TS_DRAW, s);
r.Top := Rect.Top + (Rect.Bottom - Rect.Top - s.cy) div 2;
r.Bottom := r.Top + s.cy;
r.Left := Rect.Left + Dx;
r.Right := r.Left + s.cx;
DrawThemeBackground(h, Sender.Canvas.Handle, BP_CHECKBOX, IfThen(CompareText(Item.SubItems[SubItem-1],'True')=0, CBS_CHECKEDNORMAL, CBS_UNCHECKEDNORMAL), r, nil);
finally
CloseThemeData(h);
end;
end
else
begin
r.Top := Rect.Top + (Rect.Bottom - Rect.Top - s.cy) div 2;
r.Bottom := r.Top + s.cy;
r.Left := Rect.Left + Dx;
r.Right := r.Left + s.cx;
DrawFrameControl(Sender.Canvas.Handle, r, DFC_BUTTON, IfThen(CompareText(Item.SubItems[SubItem-1],'True')=0, DFCS_CHECKED, DFCS_BUTTONCHECK));
end;
end;
end;
您沒有將DefaultDraw設置爲false,您的框可能被VCL過度繪製。 – 2011-04-01 23:20:32
謝謝塞爾特克現在我有一個進步。 – Salvador 2011-04-01 23:53:54
我的第二個答案解決了所有問題。 – 2011-04-02 12:18:43