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questioner_gui.py
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questioner_gui.py
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"""
Visual Questioner GUI.
Image drag-and-drop based on
https://benjaminirving.github.io/blog/2015/09/29/drag-and-drop-files-into-gui-using.
Async processing based on
https://www.learnpyqt.com/courses/concurrent-execution/multithreading-pyqt-applications-qthreadpool.
"""
from __future__ import division, unicode_literals, print_function, absolute_import
import os
import sys
import yaml
import argparse
import platform
import traceback
from PySide2 import QtGui, QtCore, QtWidgets
op_sys = platform.system()
if op_sys == 'Darwin':
from Foundation import NSURL
from tts import TTS
import gpt_2_simple as gpt2
from captioner import Captioner
from postprocess_utils import gpt2_gen_questions
import tensorflow as tf
tf.compat.v1.logging.set_verbosity(tf.compat.v1.logging.ERROR)
graph = None
class WorkerSignals(QtCore.QObject):
finished = QtCore.Signal()
error = QtCore.Signal(tuple)
result = QtCore.Signal(str)
class Worker(QtCore.QRunnable):
def __init__(self, fn, *args, **kwargs):
super(Worker, self).__init__()
self.fn = fn
self.args = args
self.kwargs = kwargs
self.signals = WorkerSignals()
@QtCore.Slot()
def run(self):
try:
question = self.fn(*self.args, **self.kwargs)
except:
traceback.print_exc()
exctype, value = sys.exc_info()[:2]
self.signals.error.emit((exctype, value, traceback.format_exc()))
else:
self.signals.result.emit(question)
finally:
self.signals.finished.emit()
class WindowWidget(QtWidgets.QWidget):
def __init__(self, voice):
super(WindowWidget, self).__init__()
self.sess = None
self.captioner = None
self.prepare_questioner()
self.prepare_captioner()
self.threadpool = QtCore.QThreadPool()
self.questioner_running = False
self.applying_output = False
global graph
graph = tf.get_default_graph()
if voice:
self.tts = TTS()
else:
self.tts = None
# Viewing region
self.viewing_region = QtWidgets.QLabel(self)
layout = QtWidgets.QHBoxLayout()
layout.addWidget(self.viewing_region)
# Load button
self.load_button = QtWidgets.QPushButton('Load image')
self.load_button.clicked.connect(self.load_button_clicked)
right_sidebar = QtWidgets.QVBoxLayout()
right_sidebar.addWidget(self.load_button)
# Extra instructions region
self.instr_region = QtWidgets.QLabel(self)
self.instr_region.setText('Or drop an image onto this window.')
right_sidebar.addWidget(self.instr_region)
right_sidebar.addStretch()
# Progress bar
self.progress = QtWidgets.QProgressBar(self)
self.progress.setMaximum(100)
right_sidebar.addWidget(self.progress)
self.progress.hide()
# Text region
self.text_region = QtWidgets.QLabel(self)
self.text_region.setFrameStyle(
QtWidgets.QFrame.Panel | QtWidgets.QFrame.Sunken)
self.text_region.setWordWrap(True)
self.text_region.setMargin(8)
self.text_region.setText('...')
right_sidebar.addWidget(self.text_region)
layout.addLayout(right_sidebar)
# Launch
self.setWindowIcon(QtGui.QIcon(os.path.join('icon', 'question.png')))
self.setLayout(layout)
self.setAcceptDrops(True)
self.show()
def prepare_questioner(self):
self.sess = gpt2.start_tf_sess()
gpt2.load_gpt2(self.sess)
def prepare_captioner(self):
config = yaml.load(open('config.yaml', 'r'), Loader=yaml.FullLoader)
checkpoint_path = os.path.join(config['project_root_dir'], config['checkpoint_path'])
vocab_file_path = os.path.join(config['project_root_dir'], config['vocab_file_path'])
self.captioner = Captioner(self.sess, checkpoint_path, vocab_file_path)
def load_button_clicked(self):
if self.questioner_running or self.applying_output:
print("Can't load an image right now. Questioner is busy.")
else:
image_path, _ = QtWidgets.QFileDialog.getOpenFileName(self, 'Open file')
if image_path:
self.load_image(image_path)
def load_image(self, image_path):
pixmap = QtGui.QPixmap(image_path)
pixmap = pixmap.scaled(500, 500, QtCore.Qt.KeepAspectRatio)
self.viewing_region.setPixmap(pixmap)
self.text_region.setText('Questioner is working.')
self.adjustSize()
self.questioner_running = True
worker = Worker(self.run_questioner, image_path)
worker.signals.finished.connect(self.questioner_finished)
worker.signals.error.connect(self.questioner_failed)
worker.signals.result.connect(self.apply_questioner_output)
self.threadpool.start(worker)
def run_questioner(self, image_path):
global graph
with graph.as_default(): # this is run on a separate thread
caption = self.captioner.caption(image_path)
questions = gpt2_gen_questions(
self.sess, caption, nsamples=1, temperature=0.7)
return questions[0] if len(questions) > 0 else ''
def questioner_finished(self):
self.questioner_running = False
def questioner_failed(self, e):
print(e)
def apply_questioner_output(self, question):
self.applying_output = True
if len(question) > 0:
self.text_region.setText(question)
if self.tts:
self.progress.show()
self.tts.speak(question, self.tts_callback)
self.progress.hide()
self.applying_output = False
def tts_callback(self, i, seq_len, batch_size, gen_rate):
percentage = i * 100 / seq_len
self.progress.setValue(percentage)
def dragEnterEvent(self, evt):
if evt.mimeData().hasUrls:
evt.accept()
else:
evt.ignore()
def dragMoveEvent(self, evt):
if evt.mimeData().hasUrls:
evt.accept()
else:
evt.ignore()
def dropEvent(self, evt):
if evt.mimeData().hasUrls \
and not self.questioner_running \
and not self.applying_output:
evt.setDropAction(QtCore.Qt.CopyAction)
evt.accept()
for url in evt.mimeData().urls():
if op_sys == 'Darwin':
image_path = str(NSURL.URLWithString_(str(url.toString())).filePathURL().path())
else:
image_path = str(url.toLocalFile())
self.load_image(image_path)
else:
evt.ignore()
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('--voice', '-v', action='store_true')
args = parser.parse_args()
app = QtWidgets.QApplication(sys.argv)
_ = WindowWidget(args.voice)
sys.exit(app.exec_())