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Andrej08
Joined: 31 Aug 2010
Posts: 51
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 Posted: Sat Mar 12, 2011 6:25 pm Post subject: Usage of SLOT |
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I'm trying to port the screenshot example to D2, but I'm stuck on this line:
| Code: | | QTimer.singleShot(delaySpinBox.value() * 1000, this, SLOT(shootScreen())); |
I can only find SLOT in qtd\d2\qt\QObjectDefs.d:
| Code: | | char[] SLOT( char[] a ) { return "1"~a; } |
But importing it fails as there's this import in the module:
| Code: | //import qt.core.QGlobal;
//import qt.core.Qt;
import QGlobal; |
In any case I'm not sure how this is supposed to work? I can't pass an invocation of void method to a method expecting a char[]. And how does prepending "1" help?
It's hard to figure this stuff out without any comments.. |
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mweber1488
Joined: 10 Jun 2008
Posts: 15
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| Posted: Sat Mar 12, 2011 9:17 pm Post subject: |
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SLOT is just macro that wraps the parameter in quotes so you would use: | Code: | | QTimer.singleShot(delaySpinBox.value() * 1000, this, "shootScreen"); |
Note that for the most part you do not need to tell qtd the slot parameters so for example QAbstractButton::checked(bool) would become | Code: | | connect(someObject, "some_signal", someButtonObject, "checked"); |
The opengl example in the qtd package shows how qtd does signals and slots pretty well. |
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Andrej08
Joined: 31 Aug 2010
Posts: 51
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| Posted: Sat Mar 12, 2011 10:24 pm Post subject: |
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Thanks, I'll have a look there.
One more thing, when is it necessary to use mixin Q_OBJECT; ? Do I need it for all classes deriving from a QtD class? |
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mweber1488
Joined: 10 Jun 2008
Posts: 15
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| Posted: Sun Mar 13, 2011 8:34 am Post subject: |
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| If your using the meta object system, then yes. |
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