class QFileBrowse(QWidget):
def __init__(self, subfolder_name='QR Codes', *args, **kwargs):
super().__init__(*args, **kwargs)
self.layout = QGridLayout()
self.button = QPushButton("Change save location")
self.subfolder = QCheckBox("Create subfolder")
self.subfolder.stateChanged.connect(self.update_display)
self.button.clicked.connect(self.browse)
self.subfolder_name = subfolder_name
self.dialog = QFileDialog()
self._base_path = pathlib.Path(".").expanduser().resolve()
# output path display
self.path_display = QPlainTextEdit()
# make bold
font = self.path_display.font()
font.setWeight(QFont.Bold)
self.path_display.setFont(font)
# configure height
self.path_display.setFixedHeight(QFontMetrics(font).height() * 2)
self.path_display.setLineWrapMode(QPlainTextEdit.NoWrap)
# styles
self.path_display.setReadOnly(True)
self.path_display.setFrameStyle(QFrame.Box | QFrame.Sunken)
self.path_display.setTextInteractionFlags(Qt.TextSelectableByMouse)
self.path_display.setSizePolicy(QSizePolicy.Ignored, QSizePolicy.Fixed)
self.path_display.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.path_display.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
# add widgets to layout
self.layout.addWidget(self.button, 0, 0)
self.layout.addWidget(self.subfolder, 0, 1)
self.layout.addWidget(self.path_display, 1, 0, 1, 2)
self.layout.setMargin(0)
self.setLayout(self.layout)
self.update_display()
@property
def save_path(self):
if self.subfolder.isChecked():
return self._base_path / self.subfolder_name
return self._base_path
def browse(self):
path = self.dialog.getExistingDirectory()
if path != '':
self._base_path = pathlib.Path(path).expanduser().resolve()
self.update_display()
def update_display(self):
scrollbar = self.path_display.horizontalScrollBar()
old_scroll = scrollbar.value()
scrolled_to_end = old_scroll == scrollbar.maximum()
self.path_display.setPlainText(str(self.save_path))
if scrolled_to_end:
scrollbar.setValue(scrollbar.maximum())
else:
scrollbar.setValue(old_scroll)
class MainWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.textEdit = QPlainTextEdit()
self.initUI()
def initUI(self):
openAction = QAction('&Open...', self)
openAction.setShortcut('Ctrl+O')
openAction.setStatusTip('Open JSON file')
openAction.triggered.connect(self.open)
openLinkAction = QAction('&Open URL...', self)
openLinkAction.setShortcut('Ctrl+L')
openLinkAction.setStatusTip('Load JSON by URL')
openLinkAction.triggered.connect(self.openLink)
saveAction = QAction('&Save...', self)
saveAction.setShortcut('Ctrl+S')
saveAction.setStatusTip('Save JSON file')
saveAction.triggered.connect(self.save)
exitAction = QAction('&Quit', self)
exitAction.setShortcut('Ctrl+Q')
exitAction.setStatusTip('Exit application')
exitAction.triggered.connect(self.close)
self.statusBar()
menubar = self.menuBar()
fileMenu = menubar.addMenu('&File')
fileMenu.addAction(openAction)
fileMenu.addAction(openLinkAction)
fileMenu.addAction(saveAction)
fileMenu.addSeparator()
fileMenu.addAction(exitAction)
font = self.textEdit.font()
font.setFamily("monospace")
font.setPointSize(14)
sb = self.textEdit.verticalScrollBar()
sb.setValue(sb.maximum())
self.setCentralWidget(self.textEdit)
self.resize(800, 600)
self.setWindowTitle("JSON Editor")
self.show()
def open(self):
fname, _ = QFileDialog.getOpenFileName(self, 'Open JSON file', '/home')
if fname == '':
return
f = open(fname, 'r')
with f:
data = f.read()
self.textEdit.setPlainText(data)
def openLink(self):
url, ok = QInputDialog.getText(self, 'Load JSON by URL', 'Enter URL:')
if not ok:
return
try:
with request.urlopen(url) as f:
data = f.read()
self.textEdit.setPlainText(str(data, 'utf-8'))
except (ValueError, error.URLError, error.HTTPError):
msgBox = QMessageBox()
msgBox.setText("Can't load JSON data")
msgBox.exec_()
def save(self):
try:
json.loads(self.textEdit.toPlainText())
except json.JSONDecodeError:
msgBox = QMessageBox()
msgBox.setTitle("Error")
msgBox.setText("Invalid JSON")
msgBox.exec_()
return
fname, _ = QFileDialog.getSaveFileName(self, 'Save JSON to file')
f = open(fname, "w")
f.write(self.textEdit.toPlainText())
f.close()
