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| unit Obutton;
interface
uses
SysUtils, Classes,graphics, Controls;
type
TObutton = class(TCustomControl)
private
pressed: boolean;
color: Tcolor;
protected
procedure paint; override;
procedure mousedown(button:tmousebutton; shift:tshiftstate; x,y:integer);override;
procedure mouseup (button: tmousebutton; shift:tshiftstate; x,y :integer);override;
public
constructor create (Aowner: tcomponent) ; override ;
published
end;
procedure Register;
implementation
const
OColor: Array[1..3] of tcolor =(clblack, clgray,clwhite);
procedure Register;
begin
RegisterComponents('Zusätzlich', [TObutton]);
end;
constructor tobutton.create (AOwner: TComponent) ;
begin
inherited create (Aowner);
Color := clbtnface;
canvas.brush.color := color;
pressed:= false;
setBounds (0,0,50,50);
end;
procedure tobutton.paint;
var i:integer;
begin
if pressed then for i := 1 to 3 do
begin
Canvas.pen.color := Ocolor[(i+1)div 2] ;
canvas.arc (i,i,width-i, height-i,i,i,i,i);
end
else
for i := 1 to 3 do
begin
Canvas.pen.color := ocolor[i];
canvas.arc (i,i,width-i, height-i,i,i,i,i);
end;
canvas.ellipse (3,3,width-3, Height-3);
end;
procedure tobutton.mousedown(button: tmousebutton; Shift: tshiftstate; x,y:integer);
begin
inherited mousedown (button, shift,x,y);
if button = mbleft then
begin
Pressed:= true;
Paint;
end;
end;
procedure tobutton.mouseup (button: tmousebutton; shift:tshiftstate; x,y :integer);
begin
inherited Mouseup (button, shift,x,y);
pressed:= false;
paint;
end;
end. |
raziel
