TUpDown/zh CN: what changed
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Title: TUpDown/zh CN
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| 1 | + | **TUpDown**  控件是两个按钮，附在别的可编辑控件上，通过 **Min** 和 **Max** 和 **Increment**属性来调整别的控件的内容 此控件包含两个箭头按钮，一个上一个下，也可以横向放置。 Min和Max 来设置控件的最大值和最小值，这里的值是 [[Smallint]]类型. [[Property]] **Position** 表示当前值. 加入属性 **ArrowKeys** 为 [[True]], 则可以通过键盘的上下键控制, 模拟上一个和下一个的点击. | |
| 2 | + | ||
| 3 | + | **`Asscociate`**` 属性来连接其他可编辑控件，然后将命令发送到对应的控件。` | |
| 4 | + | ||
| 5 | + | 在[[Common Controls tab]] 的 [[Component Palette]]. | |
| 6 | + | ||
| 7 | + | ## Runtime creating | |
| 8 | + | ||
| 9 | + | 我们来看一个简单的样例 [[runtime]].\ | |
| 10 | + | 首先添加一个 [[TEdit]] 控件. | |
| 11 | + | ||
| 12 | + | ``` pascal | |
| 13 | + | unit Unit1; | |
| 14 | + | ||
| 15 | + | {$mode objfpc}{$H+} | |
| 16 | + | ||
| 17 | + | interface | |
| 18 | + | ||
| 19 | + | uses | |
| 20 | + | Classes, SysUtils, Forms, Controls, Graphics, Dialogs, StdCtrls, ComCtrls; | |
| 21 | + | ||
| 22 | + | type | |
| 23 | + | ||
| 24 | + | { TForm1 } | |
| 25 | + | ||
| 26 | + | TForm1 = class(TForm) | |
| 27 | + | Edit1: TEdit; | |
| 28 | + | procedure FormCreate(Sender: TObject); | |
| 29 | + | private | |
| 30 | + | ||
| 31 | + | public | |
| 32 | + | ||
| 33 | + | end; | |
| 34 | + | ||
| 35 | + | var | |
| 36 | + | Form1: TForm1; | |
| 37 | + | ||
| 38 | + | implementation | |
| 39 | + | ||
| 40 | + | {$R *.lfm} | |
| 41 | + | ||
| 42 | + | { TForm1 } | |
| 43 | + | ||
| 44 | + | procedure TForm1.FormCreate(Sender: TObject); | |
| 45 | + | var | |
| 46 | + | UpDown1: TUpDown; | |
| 47 | + | begin | |
| 48 | + | UpDown1:= TUpDown.Create(Self); | |
| 49 | + | UpDown1.Parent:=Self; | |
| 50 | + | UpDown1.Min := -100; | |
| 51 | + | UpDown1.Max := 100; | |
| 52 | + | UpDown1.Associate := Edit1; | |
| 53 | + | end; | |
| 54 | + | ||
| 55 | + | end. | |
| 56 | + | ``` | |
| 57 | + | ||
| 58 | + | ## see also | |
| 59 | + | ||
| 60 | + | - [[doc:lcl/comctrls/tupdown.html|TUpDown doc]] | |
| 61 | + | - [[TSpinEdit]] | |
| 62 | + | ||
| 63 | + | --- | |
| 64 | + | *From the Free Pascal wiki, page "TUpDown/zh CN", as it stood on 2020-04-23 after a change by TyphonFinger, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).* |