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'''
Classes and functions for viewing/manipulating images using wxWindows.
In order to use wxWindows and still have a command line interface,
wxWindows must be imported in a separate thread and all GUI objects
must be referenced in that thread. Thus, much of the actual GUI code
is in SpyWxPythonThread.py.
'''
from __future__ import absolute_import, division, print_function, unicode_literals
viewer = None
class SpyWxPythonThreadStarter:
def start(self):
'''Starts the GUI thread.'''
import _thread
import time
_thread.start_new_thread(self.run, ())
def run(self):
'''
This is the first function executed in the wxWindows thread.
It creates the wxApp and starts the main event loop.
'''
from .spywxpythonthread import WxImageServer
self.app = WxImageServer(0)
self.app.MainLoop()
def view(self, rgb, **kwargs):
'''Sends a view request to the wxWindows thread.'''
from . import spywxpythonthread
evt = spywxpythonthread.view_imageRequest(rgb, **kwargs)
spywxpythonthread.wx.PostEvent(self.app.catcher, evt)
def init():
global viewer
viewer = SpyWxPythonThreadStarter()
viewer.start()
def view(*args, **kwargs):
'''Displays an image in a wxWindows frame.'''
from . import graphics
from spectral.spectral import Image
import numpy as np
rgb = graphics.get_rgb(*args, **kwargs)
# To plot pixel spectrum on double-click, create a reference
# back to the original SpyFile object.
if isinstance(args[0], Image):
kwargs["data source"] = args[0]
if "colors" not in kwargs:
rgb = (rgb * 255).astype(np.uint8)
else:
rgb = rgb.astype(np.uint8)
viewer.view(rgb, **kwargs)
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