TButton

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Revision as of 11:25, 15 May 2014 by Michl (talk | contribs) (new "Work with a button")
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>> LCL Components >> TButton

This page explains how to use the TButton component. When I mention to click on something, unless I explicitly say to right-click, you always left-click on the item in question.

Description

A push button control.

TButtonStandardpalette.png

Work with a button

A button is one of the most basic controls on a Form. Clicking with the mouse on it (or change with the [tab] key on the button and pressed it with enter), an action is triggered. This click is called an event. For this you need event handler that are called after the jump.

The event handler for a mouse click can be quite easily reached in which a double-click on the pasted Button (or in the Object Inspector, select the event OnClick of your Button). The event handler for a Button1 on a form Form1 will look like this:

procedure TForm1.Button1Click(Sender: TObject);
begin

end;

Between the statements begin and end you could write code that is called when Button1 is clicked.


Almost all available beginner tutorials use TButtons as an easy entry into the Object Oriented Programming with Lazarus. Following tutorials are well suited for beginners to understand the use of buttons:



Return To: LCL Components  — Previous: TPopupMenu Next: TLabel


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IPro TIpFileDataProvider • TIpHtmlDataProvider • TIpHttpDataProvider • TIpHtmlPanel
Virtual Controls TVirtualDrawTree • TVirtualStringTree • TVTHeaderPopupMenu


--Michl 12:25, 15 May 2014 (CEST)