Any idea why the view might not be rendering?

# doodle

[frankelot]

Any idea why the view might not be rendering?

[frankelot]

class UsefulApp(display: Display) : Application {
    init {
        println("Hi!")
        val pushButton = Label("Click me")
        pushButton.size = Size(300, 300)
        display += listOf(pushButton)
    }

    override fun shutdown() {}
}

[Nick]

Most views delegate rendering to a behavior; PushButton does this. So you’ll need to give it one. The best way is to use a Theme so all your buttons look the same. You can see how behaviors modules are registered in the Photos app launcher, and how a theme is selected in the app itself. There, I use several behaviors from BasicTheme. There are also many native behaviors, with one existing for buttons.

But you can also set one inline. Here’s an example of using a simple button behavior that lets you render onto its canvas:

val tf = PushButton("Hi!").apply {
    behavior = simpleButtonRenderer { button, canvas -> canvas.rect(button.bounds.atOrigin, fill = Red.paint) }
}

[frankelot]

Thank you so much!

[frankelot]

fixed 🙂

[frankelot]

well partially, fired doesn’t seem to trigger when clicked

[Nick]

sounds like you didn’t include the PointerModule. adding it to your module list will enable pointer handling. doodle minimizes the default modules to reduce bundle size; even leaving out pointer and keyboard by default.

[Nick]

the list of optional modules for Web is here.

[frankelot]

That was it! thank you!!

[frankelot]

apologies for all the basic questions

[frankelot]

https://nacular.github.io/doodle/docs/views#views-can-also-have-children

What is “// notify of change” in this code

[Nick]

this might be where a hypothetical VSplitPanel would let external listeners know that it’s left item had changed. here’s how the built in SplitPanel does it.