#43 to_julian_day only works for positive julian days, but was -32104

[roger lindberg]

Crash report: ValueError: to_julian_day only works for positive julian days, but was -32104

Strip drag before 46 century BC. I will make a timeline back to the Clock bang.

Traceback (most recent call last):
File "timelinelib\wxgui\components\timeline.pyc", line 385, in _on_motion
File "timelinelib\view\drawingarea.pyc", line 343, in mouse_moved
File "timelinelib\view\move.pyc", line 50, in mouse_moved
File "timelinelib\view\move.pyc", line 68, in _move_event
File "timelinelib\view\move.pyc", line 78, in _move_selected_events
File "timelinelib\view\move.pyc", line 86, in _get_total_move_delta
File "timelinelib\view\move.pyc", line 99, in _snap
File "timelinelib\view\drawingarea.pyc", line 317, in snap
File "timelinelib\drawing\drawers\default.pyc", line 141, in snap
File "timelinelib\drawing\drawers\default.pyc", line 149, in _distance_to_left_border
File "timelinelib\drawing\drawers\default.pyc", line 165, in _snap_region
File "timelinelib\time\gregoriantime.pyc", line 536, in start
File "timelinelib\calendar\gregorian.pyc", line 56, in to_time
File "timelinelib\calendar\gregorian.pyc", line 264, in to_julian_day
ValueError: to_julian_day only works for positive julian days, but was -32104

Timeline version: 1.5.0
System version: Windows, JEComputerRalf, 8, 6.2.9200, AMD64, Intel64 Family 6 Model 60 Stepping 3, GenuineIntel
Python version: 2.7.6 (default, Nov 10 2013, 19:24:18) [MSC v.1500 32 bit (Intel)]
wxPython version: 2.8.12.1 (msw-unicode)

[roger lindberg]

To recreate the crash:

1. Move the timeline to 47 Century BC
2. Create an event
3. Drag that event to the left

[roger lindberg]

Action: Catches the exception and display an error text in the statusbar