对齐到网格

王朝delphi·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

var

iGridSize : Integer = 16;

procedure TForm1.FormPaint(Sender: TObject);

var

i, j : integer;

begin

Self.DoubleBuffered := True;

for i := 0 to Self.Width do

for j := 0 to Self.Height do

if (j mod iGridSize = 0) and (i mod iGridSize = 0) then

Self.Canvas.Pixels[i, j] := clNavy;

end;

procedure TForm1.Shape1MouseDown(Sender: TObject; Button: TMouseButton;

Shift: TShiftState; X, Y: Integer);

begin

if Button = mbLeft then

begin

Self.iOldX := X;

Self.iOldY := Y;

end;

end;

procedure TForm1.Shape1MouseMove(Sender: TObject; Shift: TShiftState; X,

Y: Integer);

begin

if ssLeft in Shift then

begin

Shape1.Left := Shape1.Left + X - iOldX;

Shape1.Top := Shape1.Top + Y - iOldY;

end;

end;

procedure TForm1.Shape1MouseUp(Sender: TObject; Button: TMouseButton;

Shift: TShiftState; X, Y: Integer);

begin

if Button = mbLeft then

begin

if (Shape1.Left - (Shape1.Left div iGridSize) * iGridSize) (iGridSize div 2) then

begin

Shape1.Left := (Shape1.Left div iGridSize) * iGridSize + iGridSize;

end

else

begin

Shape1.Left := (Shape1.Left div iGridSize) * iGridSize;

end;

if (Shape1.Top - (Shape1.Top div iGridSize) * iGridSize) (iGridSize div 2) then

begin

Shape1.Top := (Shape1.Top div iGridSize) * iGridSize + iGridSize;

end

else

begin

Shape1.Top := (Shape1.Top div iGridSize) * iGridSize;

end;

end;

end;

 
 
 
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