Source code for glue.viewers.common.qt.base_widget

import os

from qtpy.QtCore import Qt
from qtpy import QtCore, QtWidgets
from glue.utils.qt import get_qapp
from glue.core.qt.mime import LAYERS_MIME_TYPE, LAYER_MIME_TYPE

__all__ = ['BaseQtViewerWidget']


[docs]class BaseQtViewerWidget(QtWidgets.QMainWindow): """ Base Qt class for all DataViewer widgets. This is not a viewer class in itself but is the base widget that should be used for any Qt viewer that is to appear inside the MDI area. """ window_closed = QtCore.Signal() toolbar_added = QtCore.Signal() _closed = False def __init__(self, parent=None): """ :type session: :class:`~glue.core.session.Session` """ super(BaseQtViewerWidget, self).__init__(parent) self.setWindowIcon(get_qapp().windowIcon()) status_bar = self.statusBar() status_bar.setSizeGripEnabled(False) status_bar.setStyleSheet("QStatusBar{font-size:10px}") self.setFocusPolicy(Qt.StrongFocus) self.setAttribute(Qt.WA_DeleteOnClose) self.setAcceptDrops(True) self.setAnimated(False) self.setContentsMargins(2, 2, 2, 2) self._mdi_wrapper = None # GlueMdiSubWindow that self is embedded in self._warn_close = True
[docs] def dragEnterEvent(self, event): """ Accept drag-and-drop of data or subset objects. """ if event.mimeData().hasFormat(LAYER_MIME_TYPE): event.accept() elif event.mimeData().hasFormat(LAYERS_MIME_TYPE): event.accept() else: event.ignore()
[docs] def dropEvent(self, event): """ Accept drag-and-drop of data or subset objects. """ if event.mimeData().hasFormat(LAYER_MIME_TYPE): self.request_add_layer(event.mimeData().data(LAYER_MIME_TYPE)) assert event.mimeData().hasFormat(LAYERS_MIME_TYPE) for layer in event.mimeData().data(LAYERS_MIME_TYPE): self.request_add_layer(layer) event.accept()
[docs] def mousePressEvent(self, event): """ Consume mouse press events, and prevent them from propagating down to the MDI area. """ event.accept()
[docs] def close(self, warn=True): if self._closed: return if warn and not self._confirm_close(): return self._warn_close = False if getattr(self, '_mdi_wrapper', None) is not None: self._mdi_wrapper.close() self._mdi_wrapper = None else: try: QtWidgets.QMainWindow.close(self) except RuntimeError: # In some cases the above can raise a "wrapped C/C++ object of # type ... has been deleted" error, in which case we can just # ignore and carry on. pass self._closed = True
[docs] def mdi_wrap(self): """ Wrap this object in a GlueMdiSubWindow """ from glue.app.qt.mdi_area import GlueMdiSubWindow sub = GlueMdiSubWindow() sub.setWidget(self) self.destroyed.connect(sub.close) sub.resize(self.size()) self._mdi_wrapper = sub return sub
@property def position(self): """ The location of the viewer as a tuple of ``(x, y)`` """ target = self._mdi_wrapper or self pos = target.pos() return pos.x(), pos.y()
[docs] @position.setter def position(self, xy): x, y = xy self.move(x, y)
[docs] def move(self, x=None, y=None): """ Move the viewer to a new XY pixel location You can also set the position attribute to a new tuple directly. Parameters ---------- x : int (optional) New x position y : int (optional) New y position """ x0, y0 = self.position if x is None: x = x0 if y is None: y = y0 if self._mdi_wrapper is not None: self._mdi_wrapper.move(x, y) else: QtWidgets.QMainWindow.move(self, x, y)
@property def viewer_size(self): """ Size of the viewer as a tuple of ``(width, height)`` """ if self._mdi_wrapper is not None: sz = self._mdi_wrapper.size() else: sz = self.size() return sz.width(), sz.height()
[docs] @viewer_size.setter def viewer_size(self, value): width, height = value if self._mdi_wrapper is None: self.resize(width, height) else: self._mdi_wrapper.resize(width, height)
[docs] def closeEvent(self, event): """ Call unregister on window close """ if self._warn_close and not self._confirm_close(): event.ignore() return super(BaseQtViewerWidget, self).closeEvent(event) event.accept() self.window_closed.emit()
[docs] def isVisible(self): # Override this so as to catch RuntimeError: wrapped C/C++ object of # type ... has been deleted try: return self.isVisible() except RuntimeError: return False
def _confirm_close(self): """Ask for close confirmation :rtype: bool. True if user wishes to close. False otherwise """ if self._warn_close and not os.environ.get('GLUE_TESTING'): buttons = QtWidgets.QMessageBox.Ok | QtWidgets.QMessageBox.Cancel dialog = QtWidgets.QMessageBox.warning(self, "Confirm Close", "Do you want to close this window?", buttons=buttons, defaultButton=QtWidgets.QMessageBox.Cancel) return dialog == QtWidgets.QMessageBox.Ok return True
[docs] def layer_view(self): return QtWidgets.QWidget()
[docs] def options_widget(self): return QtWidgets.QWidget()
[docs] def set_focus(self, state): if state: css = """ DataViewer { border: 2px solid; border-color: rgb(56, 117, 215); } """ else: css = """ DataViewer { border: none; } """ self.setStyleSheet(css)
[docs] @property def window_title(self): return str(self)
[docs] def update_window_title(self): try: self.setWindowTitle(self.window_title) except RuntimeError: # Avoid C/C++ errors when closing viewer pass
[docs] def set_status(self, message): sb = self.statusBar() sb.showMessage(message)