通过本文主要向大家介绍了delphi rect,rect,invalidaterect,rect函数,opencv rect等相关知识,希望对您有所帮助,也希望大家支持linkedu.com www.linkedu.com
本文以实例演示Rect、Bounds生成TRect的区别，实例代码如下：
unitUnit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ExtCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
RadioGroup1: TRadioGroup;
procedure RadioGroup1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
var
R: TRect;
procedure TForm1.FormCreate(Sender: TObject);
begin
RadioGroup1.Items.CommaText := 'Undo,Rect,Bounds';
R := Button1.BoundsRect;
end;
procedure TForm1.RadioGroup1Click(Sender: TObject);
begin
case RadioGroup1.ItemIndex of
0: Button1.BoundsRect := R;
1: Button1.BoundsRect := Rect(50,50,100,80); {参数3、4 是一个点}
2: Button1.BoundsRect := Bounds(50,50,100,80);{参数3、4 分别是宽度与高度}
end;
end;
end.
</div>
最终实现效果图如下：
