Home » Community » Newbie corner » THISBACK, is there a THATBACK?
| THISBACK, is there a THATBACK? [message #47786] |
Sun, 26 March 2017 06:50  |
ptkacz
Messages: 89
Registered: March 2017
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Member |
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On the click of a button, if we want to perform some type of action, we can specify:
myPanel.someBtn << THISBACK(doThis);
"doThis" is a local method that's executed on the click of the button, "someBtn". If wanting to for example call a method of an already created object, how does one specify something like:?
myPanel.someBtn << THISBACK(canvas.doThis);
Is there a way to do this, call a method of an object?
Peter
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| Re: THISBACK, is there a THATBACK? [message #47787 is a reply to message #47786] |
Sun, 26 March 2017 11:10  |
Zbych
Messages: 327
Registered: July 2009
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Senior Member |
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ptkacz wrote on Sun, 26 March 2017 06:50how does one specify something like:?
myPanel.someBtn << THISBACK(canvas.doThis);
Peter
Take a look at source code of THISBACK:
#define THISBACK(x) callback(this, &CLASSNAME::x)
You just need pointer to an object and method:
myPanel.someBtn << callback(&canvas, &Canvas::doThis);
[Updated on: Sun, 26 March 2017 11:11] Report message to a moderator |
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