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#!/usr/bin/env python3
# fcaption: simple image caption editor
# Copyright(c) 2015-2022 by wave++ "Yuri D'Elia" <wavexx@thregr.org>
import os, sys
import argparse
import locale
try:
from PyQt6 import QtCore, QtGui, QtWidgets
except ImportError:
from PyQt5 import QtCore, QtGui, QtWidgets
APP_DSC = "fgallery image caption editor"
APP_VER = "1.9.1"
ENCODING = locale.getpreferredencoding()
FILE_EXT = ["jpg", "jpeg", "png", "tif", "tiff"]
class ScaledImage(QtWidgets.QLabel):
def __init__(self):
super(ScaledImage, self).__init__()
self._pixmap = QtGui.QPixmap()
def setPixmap(self, pixmap):
self._pixmap = pixmap
if not pixmap.isNull():
pixmap = pixmap.scaled(self.size(),
QtCore.Qt.AspectRatioMode.KeepAspectRatio,
QtCore.Qt.TransformationMode.SmoothTransformation)
super(ScaledImage, self).setPixmap(pixmap)
def resizeEvent(self, ev):
super(ScaledImage, self).resizeEvent(ev)
if not self._pixmap.isNull():
pixmap = self._pixmap.scaled(self.size(),
QtCore.Qt.AspectRatioMode.KeepAspectRatio,
QtCore.Qt.TransformationMode.SmoothTransformation)
super(ScaledImage, self).setPixmap(pixmap)
class ThumbSignals(QtCore.QObject):
ready = QtCore.pyqtSignal(int, QtGui.QImage)
class ThumbLoader(QtCore.QRunnable):
def __init__(self, idx, path, size):
super(ThumbLoader, self).__init__()
self.idx = idx
self.path = path
self.size = size
self.signals = ThumbSignals()
def run(self):
image = QtGui.QImage(self.path)
if not image.isNull():
scaled = image.scaled(
self.size,
QtCore.Qt.AspectRatioMode.KeepAspectRatio,
QtCore.Qt.TransformationMode.SmoothTransformation)
self.signals.ready.emit(self.idx, scaled)
class MainWindow(QtWidgets.QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.setWindowTitle(APP_DSC)
# construct UI
horizontalSplitter = QtWidgets.QSplitter(QtCore.Qt.Orientation.Horizontal)
verticalSplitter = QtWidgets.QSplitter(QtCore.Qt.Orientation.Vertical)
self.image = ScaledImage()
self.image.setMinimumSize(480, 319)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Expanding,
QtWidgets.QSizePolicy.Policy.Expanding)
sizePolicy.setHorizontalStretch(1)
sizePolicy.setVerticalStretch(1)
self.image.setSizePolicy(sizePolicy)
self.image.setAlignment(QtCore.Qt.AlignmentFlag.AlignCenter)
verticalSplitter.addWidget(self.image)
horizontalLayout = QtWidgets.QHBoxLayout()
formLayout = QtWidgets.QFormLayout()
formLayout.setLabelAlignment(QtCore.Qt.AlignmentFlag.AlignRight |
QtCore.Qt.AlignmentFlag.AlignTrailing |
QtCore.Qt.AlignmentFlag.AlignVCenter)
formLayout.setWidget(0, QtWidgets.QFormLayout.ItemRole.LabelRole, QtWidgets.QLabel("Title:"))
self.edit_title = QtWidgets.QLineEdit()
formLayout.setWidget(0, QtWidgets.QFormLayout.ItemRole.FieldRole, self.edit_title)
formLayout.setWidget(1, QtWidgets.QFormLayout.ItemRole.LabelRole, QtWidgets.QLabel("Description:"))
self.edit_desc = QtWidgets.QPlainTextEdit()
self.edit_desc.setLineWrapMode(QtWidgets.QPlainTextEdit.LineWrapMode.WidgetWidth)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Expanding,
QtWidgets.QSizePolicy.Policy.Preferred)
sizePolicy.setHorizontalStretch(1)
sizePolicy.setVerticalStretch(1)
self.edit_desc.setSizePolicy(sizePolicy)
formLayout.setWidget(1, QtWidgets.QFormLayout.ItemRole.FieldRole, self.edit_desc)
horizontalLayout.addLayout(formLayout)
verticalLayout = QtWidgets.QVBoxLayout()
verticalLayout.setSizeConstraint(QtWidgets.QLayout.SizeConstraint.SetMinimumSize)
self.btn_next = QtWidgets.QPushButton("&Next")
verticalLayout.addWidget(self.btn_next)
self.btn_undo = QtWidgets.QPushButton("&Undo")
verticalLayout.addWidget(self.btn_undo)
self.btn_prev = QtWidgets.QPushButton("&Previous")
verticalLayout.addWidget(self.btn_prev)
horizontalLayout.addLayout(verticalLayout)
widget = QtWidgets.QWidget()
widget.setLayout(horizontalLayout)
verticalSplitter.addWidget(widget)
horizontalSplitter.addWidget(verticalSplitter)
self.list_files = QtWidgets.QListWidget()
self.list_files.setIconSize(QtCore.QSize(64, 64))
horizontalSplitter.addWidget(self.list_files)
self.setCentralWidget(horizontalSplitter)
# signals
self.list_files.itemActivated.connect(self.on_list)
self.btn_next.clicked.connect(self.on_next)
self.btn_prev.clicked.connect(self.on_prev)
self.btn_undo.clicked.connect(self.on_undo)
self.edit_title.textEdited.connect(self.on_changed)
self.edit_desc.textChanged.connect(self.on_changed)
# initial state
self.files = list()
self.current = 0
self.modified = False
self.thumb_pool = QtCore.QThreadPool()
self.thumb_pool.setMaxThreadCount(max(1, self.thumb_pool.maxThreadCount() // 4))
def on_next(self, ev):
if self.modified: self.save()
self.load((self.current + 1) % len(self.files))
def on_prev(self, ev):
if self.modified: self.save()
self.load((self.current - 1) % len(self.files))
def on_list(self, ev):
if self.modified: self.save()
self.load(self.list_files.currentRow())
def on_undo(self, ev):
self.load(self.current)
def thumb_ready(self, idx, image):
crow = self.list_files.currentRow()
item = self.list_files.takeItem(idx)
item.setIcon(QtGui.QIcon(QtGui.QPixmap(image)))
self.list_files.insertItem(idx, item)
self.list_files.setCurrentRow(crow)
def thumb_schedule(self):
size = self.list_files.iconSize()
for idx, path in enumerate(self.files):
thread = ThumbLoader(idx, path, size)
thread.signals.ready.connect(self.thumb_ready)
self.thumb_pool.start(thread)
def thumb_stop(self):
self.thumb_pool.clear()
self.thumb_pool.waitForDone()
def set_files(self, files):
self.files = list(files)
self.list_files.clear()
for path in files:
self.list_files.addItem(os.path.basename(path))
if len(files) < 2:
self.list_files.hide()
self.btn_next.setEnabled(False)
self.btn_prev.setEnabled(False)
else:
self.list_files.show()
self.thumb_schedule()
self.btn_next.setEnabled(True)
self.btn_prev.setEnabled(True)
self.load(0)
def on_changed(self, *_):
self.modified = True
def load(self, idx):
self.current = idx
self.list_files.setCurrentRow(idx)
path = self.files[idx]
pixmap = QtGui.QPixmap(path)
if pixmap.isNull():
self.image.setPixmap(pixmap)
self.image.setText('Cannot load {}'.format(path))
self.edit_title.setEnabled(False)
self.edit_desc.setEnabled(False)
return
self.image.clear()
self.image.setPixmap(pixmap)
self.edit_title.clear()
self.edit_desc.clear()
self.edit_title.setEnabled(True)
self.edit_desc.setEnabled(True)
base, _ = os.path.splitext(path)
txt = base + '.txt'
if os.path.isfile(txt):
data = open(txt, 'rb').read().decode(ENCODING).split('\n', 1)
if len(data) > 0:
self.edit_title.setText(data[0].strip())
if len(data) > 1:
self.edit_desc.setPlainText(data[1].strip())
self.modified = False
self.edit_title.setFocus()
def save(self):
title = str(self.edit_title.text()).strip()
desc = str(self.edit_desc.toPlainText()).strip()
base, _ = os.path.splitext(self.files[self.current])
txt = base + '.txt'
if len(title) + len(desc) == 0:
if os.path.isfile(txt):
os.remove(txt)
else:
data = title + '\n' + desc
open(txt, 'wb').write(data.encode(ENCODING))
def closeEvent(self, ev):
self.thumb_stop()
if self.modified: self.save()
super(MainWindow, self).closeEvent(ev)
# main application
def expand_dir(path):
for root, dirs, files in os.walk(path):
files.sort()
for tmp in files:
if tmp[0] == '.': continue
tmp = os.path.join(root, tmp)
ext = os.path.splitext(tmp)[1]
if ext: ext = ext[1:].lower()
if ext in FILE_EXT:
yield tmp
class Application(QtWidgets.QApplication):
def __init__(self, args):
super(Application, self).__init__(args)
# command-line flags
ap = argparse.ArgumentParser(description=APP_DSC)
ap.add_argument('--version', action='version', version=APP_VER)
ap.add_argument('files', metavar="image", nargs='*',
help='image or directory to caption')
args = ap.parse_args(map(str, args[1:]))
# ask for a directory if no files were specified
if not args.files:
path = QtWidgets.QFileDialog.getExistingDirectory(
None, "Select an image directory")
if not path: sys.exit(1)
args.files = [str(path)]
# expand directories to files
files = []
for path in args.files:
if not os.path.isdir(path):
files.append(path)
else:
files.extend(expand_dir(path))
if not files:
print("no files to caption", file=sys.stderr)
sys.exit(1)
# initialize
self.main_window = MainWindow()
self.main_window.set_files(files)
self.main_window.show()
if __name__ == '__main__':
app = Application(sys.argv)
sys.exit(app.exec())
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