Use global property to store QtWebKit availability

swiss_locator/gui/config_dialog.py

@@ -31,6 +31,7 @@
 from ..core.settings import Settings
 from ..core.language import get_language
 from ..map_geo_admin.layers import searchable_layers
+from .qtwebkit_conf import with_qt_web_kit
 
 DialogUi, _ = loadUiType(os.path.join(os.path.dirname(__file__), "../ui/config.ui"))
 
@@ -98,7 +99,7 @@ def __init__(self, parent=None):
         self.settings = settings
         self.init_widgets()
 
-        if not settings.value("with_qtwebkit"):
+        if not with_qt_web_kit():
             map_tip = self.setting_widget("show_map_tip")
             map_tip.widget.setEnabled(False)
             map_tip.widget.setToolTip(self.tr("You need to install QtWebKit to use map tips."))

swiss_locator/gui/maptip.py

@@ -22,23 +22,20 @@
 """
 
 from PyQt5.QtCore import Qt, QPoint, pyqtSignal
-try:
-    from PyQt5.QtWebKit import QWebSettings
-    from PyQt5.QtWebKitWidgets import QWebView, QWebPage
-except ModuleNotFoundError:
-    from swiss_locator.core.settings import Settings
-    settings = Settings()
-    settings.set_value("show_map_tip", False)
-    settings.set_value("with_qtwebkit", False)
-else:
-    from swiss_locator.core.settings import Settings
-    Settings().set_value("with_qtwebkit", True)
 from PyQt5.QtWidgets import QSizePolicy, QDockWidget
 from PyQt5.QtGui import QPalette, QDesktopServices, QCloseEvent
 from qgis.core import Qgis, QgsPointXY, QgsMessageLog
 from qgis.gui import QgisInterface
 
 from swiss_locator import DEBUG
+from swiss_locator.gui.qtwebkit_conf import with_qt_web_kit
+if with_qt_web_kit():
+    from PyQt5.QtWebKit import QWebSettings
+    from PyQt5.QtWebKitWidgets import QWebView, QWebPage
+else:
+    from swiss_locator.core.settings import Settings
+    settings = Settings()
+    settings.set_value("show_map_tip", False)
 
 
 class MapTip(QDockWidget):

swiss_locator/gui/qtwebkit_conf.py

@@ -0,0 +1,16 @@
+
+_WITH_QTWEBKIT = None
+
+
+def with_qt_web_kit() -> bool:
+    global _WITH_QTWEBKIT
+    if _WITH_QTWEBKIT is None:
+        try:
+            from PyQt5.QtWebKit import QWebSettings
+            from PyQt5.QtWebKitWidgets import QWebView, QWebPage
+        except ModuleNotFoundError:
+            _WITH_QTWEBKIT = False
+        else:
+            _WITH_QTWEBKIT = True
+
+    return _WITH_QTWEBKIT