是指拥有该组件的父类,即parent组件必定是一个窗口控制组件(Windowed control) 由于组件就是容纳该组件的父类,因此当父类移动时,附着其内的组件也会移动.
Object TreeVIew 里表示的就是这种关系.
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unit Unit1;
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interface
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uses
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Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
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Dialogs, StdCtrls;
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type
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TForm1 = class(TForm)
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GroupBox1: TGroupBox;
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Button1: TButton;
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Button2: TButton;
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Button3: TButton;
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Button4: TButton;
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Button5: TButton;
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procedure Button5Click(Sender: TObject);
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procedure Button3Click(Sender: TObject);
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procedure Button4Click(Sender: TObject);
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procedure FormCreate(Sender: TObject);
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private
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{ Private declarations }
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public
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{ Public declarations }
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end;
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var
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Form1: TForm1;
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implementation
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uses Unit2;
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VAR
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PB: boolean;
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{$R *.dfm}
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procedure TForm1.Button5Click(Sender: TObject);
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begin
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Form2.show
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end;
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procedure TForm1.Button3Click(Sender: TObject);
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begin
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GroupBox1.Top := GroupBox1.Top - 10;
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end;
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procedure TForm1.Button4Click(Sender: TObject);
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begin
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if PB then
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BEGIN
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Button2.Parent := Form2;
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PB := false;
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END
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else
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BEGIN
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Button2.Parent := Form1.GroupBox1;
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PB := true;
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END;
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end;
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procedure TForm1.FormCreate(Sender: TObject);
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begin
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Pb := false;
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end;
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end.
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Owner 生父
何谓Owner?就组件而言 , Owner是指作为其他组件的Owner的父组件,在负责自身 析构时,一起析构它所拥有的其下所Own的组件,也就是于此时释放它自己与它所拥有 组件所占的内存.
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unit Unit1;
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interface
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uses
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Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
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Dialogs, StdCtrls;
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type
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TForm1 = class(TForm)
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Edit1: TEdit;
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Button1: TButton;
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Button2: TButton;
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procedure Button2Click(Sender: TObject);
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private
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{ Private declarations }
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public
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{ Public declarations }
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end;
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var
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Form1: TForm1;
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implementation
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uses
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unit2;
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{$R *.dfm}
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procedure TForm1.Button2Click(Sender: TObject);
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begin
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Form2.show
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end;
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end.
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