Example of UI and classic Scene render loop?
I am working on a project to port a discrete event simulation program running under Tkinter to run on Pythonista. I have the actual animation working with the classic render loop. But now I want to port the user interface elements, like buttons and sliders as well. Of course, UI is the best tool for that. But I still can't work out to use Scene and UI in one program. Any help (preferably as an example program) is very welcome.
Split the screen into two Views... the larger can be a SceneView and the smaller being a normal ui.View.
Can the UI elements be on the Scene view?
Any simple sample code?
import scene, ui class ChristmasScene(scene.Scene): def setup(self): scene.SpriteNode('emj:Christmas_Tree', anchor_point=(0, 0), parent=self) view = scene.SceneView() view.scene = ChristmasScene() view.add_subview(ui.Button(title='Oh, Christmas Tree', center=view.center)) view.present()
The other key, perhaps, is that your button actions need to change states that then get rendered during update-- since these are called outside of the render loop, you cannot use thm to draw to the scene. But, i believe you can add Actions, Nodes, etc.
Simple ui elements like buttons/sliders can be directly implemented in scene. Look at the following discussion to see how buttons could be implemented.
See also the discussion.
Buttons are used for selecting a shape in a scene. In addition you can adjust fill color, stroke color, position, size etc. using sliders.