Eclipse Community Forums: Standard Widget Toolkit (SWT)

Help

Home

Home » Eclipse Projects » Standard Widget Toolkit (SWT) » customizing swt widget

Show: Today's Messages :: Show Polls :: Message Navigator

customizing swt widget [message #465954]

Mon, 26 December 2005 06:50

andy

Messages: 10
Registered: July 2009

Junior Member

hi,
i wanna develop my swt widget. (e.g. MyButton)
MyButton support some properties (e.g. setRolloverIcon,
setPressedIcon,setDisabledIcon and something like SWING JButton's
properties)

so, I try to make MyButton extending Button.
but it's restricted to be subclssing

alternatives are extending composite or extending canvas.
but both are not easy to expose basic Button properties to user.

what is better idea?

Report message to a moderator

Re: customizing swt widget [message #465972 is a reply to message #465954]

Tue, 27 December 2005 16:42

Daniel Spiewak

Messages: 263
Registered: July 2009

Senior Member

You can subclass Button as long as you're extremely careful to only use/override the public API and not the internal methods (even the public ones) which aren't declared as platform agnostic. Otherwise you'd have to create a new subclass for each platform and would have to change it practically with every milestone. To extend Button (or any SWT widget) use the following:

protected void checkSubclass() {
    if (!getClass().getName().equals("com.custom.MyButton"))
        SWT.error(SWT.ERROR_INVALID_SUBCLASS);
}

Report message to a moderator

Previous Topic:	control widget on main form from composite?
Next Topic:	Standard SWT Menu Icons

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Fri Apr 26 21:06:39 GMT 2024

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter