app.py 文件源码

def open_image_fd(self, dialog_text="Open Image", default_folder=""):
        """Opens a file dialog, allowing user to select an image file.

        Creates a QImage object from the filename selected by the user in the
        popup file dialog menu.

        Args:
            dialog_text [Optional(str.)]: Text to prompt user with in open file
                dialog. Defaults to "Open Image".
            default_folder [Optional(str.)]: Path of the default directory to open
                the file dialog box to. Defaults to "".

        Returns:
            QImage: Image object created from selected image file.
            None: Returns None if no file was selected in the dialog box.
        """
        fname = QtWidgets.QFileDialog.getOpenFileName(self, dialog_text, default_folder)  # TODO: Filter to show only image files
        if fname:
            image = QtGui.QImage(fname[0])
        else:
            image = None
        return image