1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140
|
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls;
type
TForm1 = class(TForm)
PaintBox1: TPaintBox;
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure PaintBox1Paint(Sender: TObject);
procedure PaintBox1MouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
procedure PaintBox1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure FormCreate(Sender: TObject);
private
{ Déclarations privées }
autorisation:boolean;
xo,yo,indice:integer;
coulfond:Tcolor;
pti:Tpoint;
pt:array[0..3] of Tpoint;
espace:Tbitmap;
Function test(x,y:integer):integer;
procedure dessiner;
public
{ Déclarations publiques }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
var l,h:integer;
begin
l:=paintbox1.ClientWidth;
h:=paintbox1.clientheight;
coulfond:=clwhite;
pt[0]:=point(l div 2,10);
pt[1]:=point(10,h div 2);
pt[2]:=point(l div 2 ,h-10);
pt[3]:=point(l-10,h div 2);
espace:=Tbitmap.Create;
with espace do begin
width:=Paintbox1.ClientWidth;
height:=paintbox1.ClientHeight;
end;
end;
procedure Tform1.dessiner;
begin
with espace.Canvas do begin
brush.Color:=coulfond;
fillrect(paintbox1.clientrect);
pen.Width:=4;
pen.Color:=clred;
moveto(pt[0].x-50,pt[0].y);
lineto(pt[0].x+50,pt[0].y);
pen.Color:=clgreen;
moveto(pt[1].x,pt[1].y-50);
lineto(pt[1].x,pt[1].y+50);
pen.Color:=clyellow;
moveto(pt[2].x-50,pt[2].y);
lineto(pt[2].x+50,pt[2].y);
pen.Color:=clblue;
moveto(pt[3].x,pt[3].y-50);
lineto(pt[3].x,pt[3].y+50);
end;
paintbox1.Canvas.Draw(0,0,espace);
end;
procedure TForm1.PaintBox1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
if espace.Canvas.Pixels[x,y]<>coulfond then begin
autorisation:=true;
xo:=x;
yo:=y;
indice:=test(x,y);
pti:=pt[indice];
screen.Cursor:=crhandpoint;
end;
end;
procedure TForm1.PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
if autorisation then begin
pt[indice]:=point(pti.x+x-xo,pti.y+y-yo);
dessiner;
end;
end;
procedure TForm1.PaintBox1MouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
autorisation:=false;
screen.Cursor:=crdefault;
end;
procedure TForm1.PaintBox1Paint(Sender: TObject);
begin
dessiner;
end;
procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
espace.Free;
end;
function Tform1.test(x,y:integer):integer;
var i,min,val,ind:integer;
d:array[0..3]of integer;
begin
val:=1000;
min:=1000; //volontairement grand au départ
for i:=0 to 3 do begin
d[i]:=round(sqrt(sqr(x-pt[i].x)+sqr(y-pt[i].y)));
if d[i]<=val then val:=d[i];
if val<min then begin min:=val;
ind:=i;
end;
end;
result:=ind;
end;
end. |
Partager