On Wednesday, 22 January 2020 at 21:26:40 UTC, Ron Tarrant wrote:
On Wednesday, 22 January 2020 at 09:18:51 UTC, Ferhat Kurtulmuş
wrote:
Another useful tutorial would be something using bindProperty
and/or bindPropertyWithClosures. Once I used bindProperty with
vala, but I think there is no any example to do it with gtkd.
I found a bindProperty() function in gobject/ObjectG.d. Is this
what you're referring to?
Yes that one. Let me define a use case. We have a button spawning
a thread doing some time consuming job (we can use
Thread.sleep(5.seconds)). I want this button disabled so that
user cannot spawn another thread while the first one is on duty.
In the same time, we show a spinner while job is running. After
completion, we want to set button enabled and to make the spinner
invisible. Instead of setting properties of button and spinner
separately, we can bind disabled property of the button and
visible property of the spinner each other. In vala, we can use
something like (pseudo code):
"this" may refer to a self pointer to an instance of derived
spinner class:
this.bind_property("customWorkingProperty", somebutton,
"sensitive", BindingFlags.INVERT_BOOLEAN);
bool customWorkingProperty() will be responsible for showing and
hiding the spinner.
