TGroupBox: what changed
Revision 0 to 1. Removed lines have a minus sign; added lines have a plus sign.
Title: TGroupBox
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| 1 | + | A **TGroupBox**  is a container that allows a number of objects to be grouped physically and conceptually on a [[TForm|form]]. | |
| 2 | + | ||
| 3 | + | ## Usage | |
| 4 | + | ||
| 5 | + | To use a [[doc:lcl/stdctrls/tgroupbox.html|TGroupBox]] on a form, you can simply select it on the [[Standard tab]] of the [[Component Palette]] and place it by clicking on the form. | |
| 6 | + | ||
| 7 | + | ## Small example | |
| 8 | + | ||
| 9 | + | - create a new application and place two TGroupBoxes on your form | |
| 10 | + | - in GroupBox1 insert a [[TButton]] *Button1* and in GroupBox2 TButton *Button2* | |
| 11 | + | - put on your form (outside of the groupboxes) two [[TRadioButton]] | |
| 12 | + | - change in the [[IDE Window: Object Inspector|object Inspector]] the caption of RadioButton1 to *User* and of RadioButton2 to *Administrator* | |
| 13 | + | - change the [[Property|property]] *Checked* of RadioButton2 to *[[True]]* | |
| 14 | + | - create the *OnChange* [[Event handler|event handler]] of RadioButton1 by double clicking *RadioButton1* | |
| 15 | + | - use this handler also for RadioButton2 | |
| 16 | + | - choose in the object Inspector ''RadioButton2' | |
| 17 | + | - now select the tab *Events* in the object Inspector | |
| 18 | + | - go to the event *OnChange* and select in the adjacent combobox *RadioButton1Change* | |
| 19 | + | - make *GroupBox2* for user invisible by choosing in the RadioButton | |
| 20 | + | - write following line in the event handler of the RadioButtons in the source editor: | |
| 21 | + | ||
| 22 | + | ``` Pascal | |
| 23 | + | procedure TForm1.RadioButton1Change(Sender: TObject); | |
| 24 | + | begin | |
| 25 | + | GroupBox2.Visible:=Radiobutton2.Checked; | |
| 26 | + | end; | |
| 27 | + | ``` | |
| 28 | + | ||
| 29 | + | - add still the event handler of the buttons and add some code like: | |
| 30 | + | ||
| 31 | + | ``` Pascal | |
| 32 | + | procedure TForm1.Button1Click(Sender: TObject); | |
| 33 | + | begin | |
| 34 | + | ShowMessage('User and administrator can click this button'); | |
| 35 | + | end; | |
| 36 | + | ||
| 37 | + | procedure TForm1.Button2Click(Sender: TObject); | |
| 38 | + | begin | |
| 39 | + | ShowMessage('Only administrator can click this button'); | |
| 40 | + | end; | |
| 41 | + | ``` | |
| 42 | + | ||
| 43 | + | - it shows in the [[Dialog Examples|ShowMessage dialog]] who can press the button | |
| 44 | + | - start your program, it could look like: | |
| 45 | + | ||
| 46 | + |  -\>  | |
| 47 | + | ||
| 48 | + | ## See also | |
| 49 | + | ||
| 50 | + | - [[doc:lcl/stdctrls/tgroupbox.html|TGroupBox doc]] | |
| 51 | + | - [[TPairSplitter]] | |
| 52 | + | - [[TNotebook]] | |
| 53 | + | - [[TPageControl]] | |
| 54 | + | - [[TTabControl]] | |
| 55 | + | ||
| 56 | + | --- | |
| 57 | + | *From the Free Pascal wiki, page "TGroupBox", as it stood on 2019-09-15 after a change by Djzepi, 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).* |