Difference between revisions of "TGroupBox"
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| − | + | {{TGroupBox}} | |
| − | + | A '''TGroupBox''' [[image:tgroupbox.png]] is a container that allows a number of objects to be grouped physically and conceptually on a [[TForm|form]]. | |
| − | + | ==Usage== | |
| − | + | 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. | |
| − | [[ | ||
| − | == | + | ==Small example== |
| + | * create a new application and place two TGroupBoxes on your form | ||
| + | * in GroupBox1 insert a [[TButton]] ''Button1'' and in GroupBox2 TButton ''Button2'' | ||
| + | * put on your form (outside of the groupboxes) two [[TRadioButton]] | ||
| + | * change in the [[IDE_Window:_Object_Inspector|object Inspector]] the caption of RadioButton1 to ''User'' and of RadioButton2 to ''Administrator'' | ||
| + | * change the [[Property|property]] ''Checked'' of RadioButton2 to ''[[True]]'' | ||
| + | * create the ''OnChange'' [[Event handler|event handler]] of RadioButton1 by double clicking ''RadioButton1'' | ||
| + | * use this handler also for RadioButton2 | ||
| + | ** choose in the object Inspector ''RadioButton2' | ||
| + | ** now select the tab ''Events'' in the object Inspector | ||
| + | ** go to the event ''OnChange'' and select in the adjacent combobox ''RadioButton1Change'' | ||
| + | * make ''GroupBox2'' for user invisible by choosing in the RadioButton | ||
| + | ** write following line in the event handler of the RadioButtons in the source editor: | ||
| + | <syntaxhighlight lang="Pascal"> | ||
| + | procedure TForm1.RadioButton1Change(Sender: TObject); | ||
| + | begin | ||
| + | GroupBox2.Visible:=Radiobutton2.Checked; | ||
| + | end; | ||
| + | </syntaxhighlight> | ||
| + | * add still the event handler of the buttons and add some code like: | ||
| + | <syntaxhighlight lang="Pascal"> | ||
| + | procedure TForm1.Button1Click(Sender: TObject); | ||
| + | begin | ||
| + | ShowMessage('User and administrator can click this button'); | ||
| + | end; | ||
| − | '' | + | procedure TForm1.Button2Click(Sender: TObject); |
| + | begin | ||
| + | ShowMessage('Only administrator can click this button'); | ||
| + | end; | ||
| + | </syntaxhighlight> | ||
| + | * it shows in the [[Dialog_Examples#ShowMessage|ShowMessage dialog]] who can press the button | ||
| + | * start your program, it could look like: | ||
| + | [[image:ExampleTGroupBox1.png]] -> [[image:ExampleTGroupBox2.png]] | ||
| + | ==See also== | ||
| + | * [[doc:lcl/stdctrls/tgroupbox.html|TGroupBox doc]] | ||
| + | * [[TPairSplitter]] | ||
| + | * [[TNotebook]] | ||
| + | * [[TPageControl]] | ||
| + | * [[TTabControl]] | ||
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{{LCL Components}} | {{LCL Components}} | ||
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Latest revision as of 09:16, 15 September 2019
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A TGroupBox 
is a container that allows a number of objects to be grouped physically and conceptually on a form.
Usage
To use a 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.
Small example
- create a new application and place two TGroupBoxes on your form
- in GroupBox1 insert a TButton Button1 and in GroupBox2 TButton Button2
- put on your form (outside of the groupboxes) two TRadioButton
- change in the object Inspector the caption of RadioButton1 to User and of RadioButton2 to Administrator
- change the property Checked of RadioButton2 to True
- create the OnChange event handler of RadioButton1 by double clicking RadioButton1
- use this handler also for RadioButton2
- choose in the object Inspector RadioButton2'
- now select the tab Events in the object Inspector
- go to the event OnChange and select in the adjacent combobox RadioButton1Change
- make GroupBox2 for user invisible by choosing in the RadioButton
- write following line in the event handler of the RadioButtons in the source editor:
procedure TForm1.RadioButton1Change(Sender: TObject);
begin
GroupBox2.Visible:=Radiobutton2.Checked;
end;
- add still the event handler of the buttons and add some code like:
procedure TForm1.Button1Click(Sender: TObject);
begin
ShowMessage('User and administrator can click this button');
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
ShowMessage('Only administrator can click this button');
end;
- it shows in the ShowMessage dialog who can press the button
- start your program, it could look like:
-> 
See also
