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我對delphi編程非常陌生:( 我想用一個透明的背景層和一個帶有圓形的頂層做一個自定義的組件，但是，下面的代碼工作正常添加到表單上。 Exception，它是有另一種成分的事實與或對定製組件的頂部重疊，它下面的謊言和不顯示。 我已經試過以下表單上delphi組件順序和圖層選項
BadgeTest1.BringToFront;
BadgeTest1.ComponentIndex:=2;
IndexVal:= BadgeTest1.ComponentIndex;
然而，仍然doens't工作。有無論如何定製組件顯示在其他組件頂部？只有圓形部分？ 另外，我'我一直試圖在定製組件的中心（水平和垂直）放置一個標題，我嘗試過使用TextOut（）過程。如果有更好的選擇，你能否讓我知道？下面是 是我爲BadgeTest定製組件的代碼。 請幫忙， 非常感謝！
type
TBadgeTest=class(TGraphicControl)
private
FCaption:TCaption;
FColor:TColor;
FLayers:TLayerCollection;
FHeight:Integer;
FWidth:Integer;
protected
procedure Paint; override;
procedure SetBkgLayer;
procedure SetSecondLayer;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
published
property Caption:TCaption read FCaption write FCaption;
end;
procedure Register;
implementation
procedure Register;
begin
RegisterComponents('Sample', [TBadgeTest]);
end;
constructor TBadgeTest.Create(AOwner: TComponent);
var
ACanvas:TcxCanvas;
begin
inherited;
FHeight:=20;
Self.Height:=FHeight;
Constraints.MaxHeight:=20;
Constraints.MinHeight:=20;
FHeight:=20;
Self.Width:=FWidth;
Constraints.MaxWidth:=20;
Constraints.MinWidth:=20;
end;
destructor TBadgeTest.Destroy;
begin
inherited;
end;
procedure TBadgeTest.SetBkgLayer;
var
Bitmap:TBitmap32;
Layer: TCustomLayer;
begin
FLayers := TLayerCollection.Create(Self);
Layer := FLayers.Add(TBitmapLayer);
Layer.Index:=0;
Bitmap:= TBitmap32.Create;
Bitmap.DrawMode:=dmOpaque;
Bitmap.SetSize(Width, Height);
Bitmap.clear($00000000);
Bitmap.Canvas.Pen.Width:=0;
Bitmap.Canvas.Brush.Color:=$00107EFF;
Bitmap.Canvas.Brush.Style:=bsClear;
Bitmap.Canvas.Ellipse(Rect(0,0,20,20));
end;
procedure TBadgeTest.SetSecondLayer;
var
Bitmap:TBitmap32;
Layer: TCustomLayer;
begin
Layer := FLayers.Add(TBitmapLayer);
Layer.Index:=1;
Layer.LayerOptions:= LOB_VISIBLE;
Bitmap:=TBitmap32.Create;
Bitmap.DrawMode:=dmCustom;
Bitmap.SetSize(Width, Height);
Bitmap.clear($00000000);
Bitmap.Canvas.Pen.Width:=0;
Bitmap.Canvas.Brush.Color:=$00107EFF; //FF7E10
Bitmap.Canvas.Brush.Style:=bsSolid;
Bitmap.Canvas.Ellipse(Rect(0,0,Self.Width,Self.Height));
Layer.BringToFront;
Layer.BringToFront;
//Layer.Scaled:=true;
// Layer.Bitmap:=Bitmap;
end;
procedure TBadgeTest.Paint;
var
R:TRect;
borderColor : Integer;
fillCircle : Integer;
fontColor : Integer;
fontSize : Integer;
Bitmap:TBitmapImage;
const
_FF7E10_COLOR:Integer = $00107EFF; //#FF7E10
begin
inherited;
borderColor:=_FF7E10_COLOR;
fillCircle:=_FF7E10_COLOR;
Canvas.Pen.Create;
Canvas.Pen.Style:=psClear;
Canvas.Pen.Color:=borderColor;
Canvas.Pen.Width:=0;
SetBkgLayer;
SetSecondLayer;
Canvas.Brush.Create;
Canvas.Brush.Style:= bsClear;
Canvas.Brush.Color:=fillCircle;
Canvas.Ellipse(0,0,Self.Width,Self.Height);
Canvas.Font.Color:=clWhite;
Canvas.Font.Name:='Arial';
Canvas.Font.Size:=8;
Canvas.Font.Quality := fqNonAntialiased;
Canvas.Font.Style := [fsBold];
R.Create(0, 0, Self.Width, Self.Height);
//DrawText(Canvas.Handle, PChar(FCaption), -1, R, vaCenter);
// Canvas.DrawText(FCaption, R, taCenter, vaCenter, False, False);
Canvas.TextOut(5, 5, FCaption);
//SetTextAlign(Canvas.Handle, ta_center);
//DrawText(Canvas.Handle, PChar(FCaption),
//R.Create(1, 10, 2, 26);
// Self.Width := Canvas.TextWidth(FCaption) + 30;
end;