GUIzero Widget Programming

[last updated: 2022-09-23]
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• To start with, each widget has its own set of parameters.
  You can set these parameters to be what you want when you define the widget.

  
  After definition, you can re-set, ie. change, most of the parameters, but not all of them.

• For example - the Box widget:
  • The Box widget has 9 parameters that can be set when you define the box:
    master, layout, height, width, border, grid, align, visible, and enabled
  • When you define a box, you must at least specify the "master" parameter. This is the name of the container that your box will be placed inside of.
  • After initial definition, you can change (some) parameters with:
    • widgetName.parameter method:
      • eg. box1.height = 50
      • box1.bg = "red"
        This is an interesting thing. The deal is that bg, background, is not listed as an official parameter of the box widget in GUIzero,
        yet you can indeed specify/change it with this code.
        I don't understand it at the moment. Suspect it's a parameter from tkinter which seems to be like the core of GUIzero.
      • Parameters I've changed with this method:
        height (of a box), bg,
    • widgetName.tk.config method:
      • [widgetName].tk.config( [paramName] = [paramValue] )
        So for example, to change the border thickness, you'd enter:
        [widgetName].tk.config(border=3)
      • For the box widget, I could not change align, visible, or grid with the tk.config method.
        I did successfully change height and width.

  • But:
    Using the tk.config method, I could change box parameters: bg (background), ...

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