Merge from 5.x: PR #20221

Fixes #20144
Fixes #20101

runtests.py

@@ -20,7 +20,7 @@
 # NOTE: This needs to be imported before any QApplication.
 # Don't remove it or change it to a different location!
 # pylint: disable=wrong-import-position
-from qtpy import QtWebEngineWidgets  # pylint: disable=unused-import
+from qtpy import QtWebEngineWidgets  # noqa
 import pytest
 
 

spyder/api/_version.py

@@ -6,5 +6,5 @@
 
 """Spyder API Version."""
 
-VERSION_INFO = (0, 8, 0)
+VERSION_INFO = (0, 9, 0)
 __version__ = '.'.join(map(str, VERSION_INFO))

spyder/api/plugins/new_api.py

@@ -279,6 +279,17 @@ class SpyderPluginV2(QObject, SpyderActionMixin, SpyderConfigurationObserver,
         Unmaximize plugin only if it is not `plugin_instance`.
     """
 
+    sig_mainwindow_state_changed = Signal(object)
+    """
+    This signal is emitted when the main window state has changed (for
+    instance, between maximized and minimized states).
+
+    Parameters
+    ----------
+    window_state: Qt.WindowStates
+        The window state.
+    """
+
     # --- Private attributes -------------------------------------------------
     # ------------------------------------------------------------------------
     # Define configuration name map for plugin to split configuration

spyder/api/widgets/auxiliary_widgets.py

@@ -9,7 +9,7 @@
 """
 
 # Third party imports
-from qtpy.QtCore import QEvent, Qt, QSize, Signal
+from qtpy.QtCore import QEvent, QSize, Signal
 from qtpy.QtWidgets import QMainWindow, QSizePolicy, QToolBar, QWidget
 
 # Local imports

spyder/app/mainwindow.py

@@ -142,6 +142,17 @@ class MainWindow(QMainWindow, SpyderConfigurationAccessor):
     sig_moved = Signal("QMoveEvent")
     sig_layout_setup_ready = Signal(object)  # Related to default layouts
 
+    sig_window_state_changed = Signal(object)
+    """
+    This signal is emitted when the window state has changed (for instance,
+    between maximized and minimized states).
+
+    Parameters
+    ----------
+    window_state: Qt.WindowStates
+        The window state.
+    """
+
     def __init__(self, splash=None, options=None):
         QMainWindow.__init__(self)
         qapp = QApplication.instance()
@@ -416,6 +427,8 @@ def register_plugin(self, plugin_name, external=False, omit_conf=False):
         # Connect Main window Signals to plugin signals
         self.sig_moved.connect(plugin.sig_mainwindow_moved)
         self.sig_resized.connect(plugin.sig_mainwindow_resized)
+        self.sig_window_state_changed.connect(
+            plugin.sig_mainwindow_state_changed)
 
         # Register plugin
         plugin._register(omit_conf=omit_conf)