NSImage

[Peter666]

Hi,

hat schon mal jemand auf OSX/iOS ein NSImage über das bestehende Canvas gezeichnet? Der Hintergrund ist der: Ich wollte gerne über den Browser eine Art einblendbares Halbtransparentes OSD packen und das geht mit Firemonkey ja nicht wirklich.

Delphi-Quellcode:

unit UOSD;

interface

uses System.Types, System.Classes, FMX.Graphics, FMX.Controls;

type
  TOSD = class(TControl)
  protected
    FBitmap: TBitmap;
    FNativePaint: Boolean;

    procedure Paint; override;
    procedure SetBitmap(const ABitmap: TBitmap);
    procedure SetNativePaint(const ANativePaint: Boolean);
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Bitmap: TBitmap read FBitmap write SetBitmap;
    property Opacity;
    property NativePaint: Boolean read FNativePaint write SetNativePaint
      default false;
  end;

implementation

constructor TOSD.Create(AOwner: TComponent);
begin
  inherited;
  Width := 100;
  Height := 100;
  FBitmap := TBitmap.Create;
end;

destructor TOSD.Destroy;
begin
  FBitmap.Free;
  inherited;
end;

procedure TOSD.SetNativePaint(const ANativePaint: Boolean);
begin
  if FNativePaint <> ANativePaint then
  begin
    FNativePaint := ANativePaint;
    Repaint;
  end;
end;

procedure TOSD.SetBitmap(const ABitmap: TBitmap);
begin
  FBitmap.Assign(ABitmap);
  Repaint;
end;

//WindowHandleToPlatform(FForm.Handle).View
procedure TOSD.Paint;
var
  DstRect: TRectF;
begin
{$IFDEF MACOS}
  if FNativePaint then
  begin
    exit;
  end;
{$ENDIF}
  DstRect := FBitmap.BoundsF;
  DstRect.Fit(BoundsRect);
  Canvas.DrawBitmap(FBitmap, FBitmap.BoundsF, DstRect, Opacity)
end;

end.

Peter