"""
App that can be used to generate errors on the Python and JS side. These
errors should show tracebacks in the correct manner (and not crash the app
as in #164).
"""
from flexx import app, event, ui
class ErrorsPy(app.PyComponent):
def init(self):
self.js = ErrorsJS(self)
@event.action
def do_something_stupid(self):
self.raise_error()
def raise_error(self):
raise RuntimeError('Deliberate error')
@event.reaction('!js.b4_pointer_click')
def error_in_Py_reaction(self, *events):
self.raise_error()
class ErrorsJS(ui.Widget):
def init(self, pycomponent):
self.py = pycomponent
with ui.VBox():
self.b1 = ui.Button(text='Raise error in JS action')
self.b2 = ui.Button(text='Raise error in JS reaction')
self.b3 = ui.Button(text='Raise error in Python action')
self.b4 = ui.Button(text='Raise error in Python reaction')
ui.Widget(flex=1) # spacer
@event.action
def do_something_stupid(self):
self.raise_error(0)
def raise_error(self):
raise RuntimeError('Deliberate error')
# Handlers for four buttons
@event.reaction('b1.pointer_click')
def error_in_JS_action(self, *events):
self.do_something_stupid()
@event.reaction('b2.pointer_click')
def error_in_JS_reaction(self, *events):
self.raise_error()
@event.reaction('b3.pointer_click')
def error_in_Py_action(self, *events):
self.py.do_something_stupid()
@event.reaction('b4.pointer_click')
def error_in_Py_reaction(self, *events):
self.emit('b4_pointer_click')
if __name__ == '__main__':
m = app.launch(ErrorsPy, 'browser')
app.run()