mainunit.pas

Delphi7经典问题解析源代码Delphi7经典问解析源代码

unit mainunit;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls;

type
  TForm1 = class(TForm)
    GroupBox1: TGroupBox;
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Timer1: TTimer;
    
    procedure FormCreate(Sender: TObject);
    procedure FormPaint(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Timer1Timer(Sender: TObject);
  private
    { Private declarations }
  public
    procedure GetRectArea;
    { Public declarations }
  end;

var
  Form1: TForm1;
  FormHandle:Hwnd;
  FrmLeft,FrmTop,FrmRight,FrmBottom:Integer;
implementation

{$R *.dfm}
procedure JudgePointPosition(CurPoint:TPoint);
begin
 if ((CurPoint.X >= FrmLeft) and (CurPoint.X <= Frmright) and
     (CurPoint.Y >= FrmTop) and (CurPoint.Y <= FrmBottom)) then
    begin
     Form1.Show;
    end
    else
    begin
     Form1.hide;
    end;
end;

procedure TForm1.GetRectArea;
var
 rect:TRect;
begin
 GetWindowRect(FormHandle,rect);
 label1.Caption:='窗体左上角坐标:'+'('+Inttostr(rect.left)+','+Inttostr(rect.top)+')';
 label2.Caption:='窗体右上角坐标:'+'('+Inttostr(rect.right)+','+Inttostr(rect.top)+')';
 label3.Caption:='窗体左下角坐标:'+'('+Inttostr(rect.left)+','+Inttostr(rect.bottom)+')';
 label4.Caption:='窗体右下角坐标:'+'('+Inttostr(rect.right)+','+Inttostr(rect.bottom)+')';
 FrmLeft:=rect.left;
 FrmTop:=rect.top;
 FrmRight:=rect.right;
 FrmBottom:=rect.bottom;
end;


procedure TForm1.FormCreate(Sender: TObject);
begin
 FormHandle:=Form1.Handle;
end;

procedure TForm1.FormPaint(Sender: TObject);
begin
 GetRectArea;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
 Timer1.Enabled:=False;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
 Timer1.Enabled:=True;
end;

procedure TForm1.Timer1Timer(Sender: TObject);
var
 P:TPoint;
begin
 GetRectArea;
 GetCursorPos(P);
 Form1.label6.caption:='横坐标:'+InttoStr(P.x);
 Form1.label7.caption:='纵坐标:'+InttoStr(P.y);
 JudgePointPosition(P);
end;

end.