I am prototyping a GUI design using the simulator under Windows. Running it under C worked, but MicroPython crashed, displaying a blank window that immediately disappeared. I ran "micropython gui_guider.py:" in a terminal window to find this message:
File "/Users/wmb/Documents/Tablet7/generated/gui_guider.py", line 430, in <module>
TypeError: can't convert float to int
The offending line of code was:
screen_label_state.set_pos(10, 19.5)
That non-integral position 19.5 resulted from the VerticalAlignCenter command, where I tried to align a first item of height 33 to a second item with Y position 11, height 50. The calculation resulted in a first item Y position of 19.5, which appeared in the Attributes:Position display in GUI-Guider.
The C compiler demoted the floating point value 19.5 to integer, so the C version worked. MicroPython errored out.
I believe that GUI Guider should round calculated positions to integer to avoid such problems.
It is easy to workaround this problem if you happen to notice it. You can just hit the decrement button on the Position and it will remove the .5 .
