class _BrowseWidget(QWidget):
pathChanged = Signal(str)
def __init__(self, parent=None):
QWidget.__init__(self, parent)
# Variables
self._basedir = None
# Widgets
self._txt_path = QLineEdit()
self._txt_path.setReadOnly(True)
btn_browse = QPushButton("Browse")
# Layouts
layout = QHBoxLayout()
layout.setContentsMargins(0, 0, 0, 0)
layout.addWidget(self._txt_path, 1)
layout.addWidget(btn_browse)
self.setLayout(layout)
# Signal
btn_browse.released.connect(self._onBrowse)
def _showDialog(self, basedir):
raise NotImplementedError
def _validatePath(self, path):
raise NotImplementedError
def _onBrowse(self):
oldpath = self.path()
newpath = self._showDialog(self.baseDir())
if not newpath and not oldpath:
return
elif not newpath and oldpath:
newpath = oldpath
else:
self.pathChanged.emit(newpath)
try:
self.setPath(newpath)
except Exception as ex:
messagebox.exception(self, ex)
def setBaseDir(self, path):
if not path:
path = os.getcwd()
if os.path.isfile(path):
path = os.path.dirname(path)
if not os.path.isdir(path):
raise ValueError("%s is not a directory" % path)
self._basedir = path
def baseDir(self):
return self._basedir or os.getcwd()
def setPath(self, path, update_basedir=True):
if not path:
self._txt_path.setText("")
self.pathChanged.emit(None)
return
path = os.path.abspath(path)
self._validatePath(path)
self._txt_path.setText(path)
self._txt_path.setCursorPosition(0)
if update_basedir:
self.setBaseDir(path)
os.chdir(self.baseDir())
self.pathChanged.emit(path)
def path(self):
"""
Returns the path to the selected file.
If no file is selected, the method returns ``None``
"""
path = self._txt_path.text()
return path if path else None
