用户自定义控件大小和位置

来源：互联网发布：不去健身房健身知乎编辑：程序博客网时间：2024/05/14 10:32

unit Unit1;

interface

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

type
TForm1 = class(TForm)
    Edit1: TEdit;
    procedure Edit1MouseMove(Sender: TObject; Shift: TShiftState; X,
     Y: Integer);
    procedure Edit1MouseDown(sender: tobject; button: tmousebutton;
      Shift: tshiftstate; x, y: integer);
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Edit1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
if (x>=0)and(x<=5) then
begin
    if (y>=0)and(y<=5) then Edit1.cursor:=crsizenwse;
    if (y>5)and(y<Edit1.height-5) then Edit1.cursor:=crsizewe;
    if (y>=Edit1.height-5)and(y<=Edit1.height) then Edit1.cursor:=crsizenesw;
end
else if (x>5)and(x<Edit1.width-5) then
begin
    if (y>=0)and(y<=5) then Edit1.cursor:=crsizens;
    if (y>5)and(y<Edit1.height-5) then Edit1.cursor:=crarrow;
    if (y>=Edit1.height-5)and(y<=Edit1.width) then Edit1.cursor:=crsizens;
end
else if (x>=Edit1.width-5)and(x<=Edit1.width) then
begin
    if (y>=0)and(y<=5) then Edit1.cursor:=crsizenesw;
    if (y>5)and(y<Edit1.height-5) then Edit1.cursor:=crsizewe;
    if (y>=Edit1.height-5)and(y<=Edit1.width) then Edit1.cursor:=crsizenwse;
end;
end;

procedure tform1.Edit1MouseDown(sender: tobject; button: tmousebutton;
shift: tshiftstate; x, y: integer);
begin
releasecapture;
if (x>=0)and(x<=5) then
begin
    //左上角方向改变大小
    if (y>=0)and(y<=5) then Edit1.perform(wm_syscommand,$f004,0);
    //左侧
    if (y>5)and(y<Edit1.height-5) then Edit1.perform(wm_syscommand,$f001,0);
    //左下角
    if (y>=Edit1.height-5)and(y<=Edit1.height) then Edit1.perform(wm_syscommand,$f007,0);
end
else if (x>5)and(x<Edit1.width-5) then
begin
    //上侧
    if (y>=0)and(y<=5) then Edit1.perform(wm_syscommand,$f003,0);
    //移动控件
    if (y>5)and(y<Edit1.height-5) then Edit1.perform(wm_syscommand,$f012,0);
    //下侧
    if (y>=Edit1.height-5)and(y<=Edit1.width) then Edit1.perform(wm_syscommand,$f006,0);
end
else if (x>=Edit1.width-5)and(x<=Edit1.width) then
begin
    //右上角
    if (y>=0)and(y<=5) then Edit1.perform(wm_syscommand,$f005,0);
    //右侧
    if (y>5)and(y<Edit1.height-5) then Edit1.perform(wm_syscommand,$f002,0);
    //右下角
    if (y>=Edit1.height-5)and(y<=Edit1.width) then Edit1.perform(wm_syscommand,$f008,0);
end;
end;

end.