RuntimeError button

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Summary

Create a program
create in window1 a method empty named "Start"

Add a button in window1 named "Start"
add Handler "Pressed" for button
hit:


Start() #CRASH APP

Self.Start() #CRASH APP ALSO

Run prog, click button crash....

Objo Studio Version

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Expected Result

Actual Result

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Garry

Thanks for the report. This was caused by a name collision.

In the project, the window has a method named Start, and the button is also named Start. The visual designer generates a window property for the control, effectively Property Start As Button. At runtime, Start() / Self.Start() could resolve to that generated button property rather than the method, so the VM tried to call a Button instance and produced the unhelpful “Can only call functions and classes” error.

This has now been fixed for the next release: https://feedback.objo.dev/bug/447

Objo will report this as a compile-time error instead:

Class 'Window1' defines both a property and a method named 'Start'. Rename one of them.

For current builds, the workaround is to rename either the control or the method, for example StartButton for the button and Start() for the method.