Create a static icon component for toolbars

bliss/flint/widgets/utils/static_icon.py

+# -*- coding: utf-8 -*-
+#
+# This file is part of the bliss project
+#
+# Copyright (c) 2015-2022 Beamline Control Unit, ESRF
+# Distributed under the GNU LGPLv3. See LICENSE for more info.
+
+from __future__ import annotations
+
+import typing
+from silx.gui import qt
+from silx.gui import icons
+
+
+class StaticIcon(qt.QLabel):
+
+    clicked = qt.Signal()
+
+    def __init__(self, parent=None):
+        super(StaticIcon, self).__init__(parent=parent)
+        self.__targetAction = None
+
+    def setIcon(self, icon: typing.Union[str, qt.QIcon]):
+        """Set an icon
+
+        Arguments:
+            icon: This can be a QIcon or a silx resource name.
+        """
+        if isinstance(icon, str):
+            icon = icons.getQIcon(icon)
+        # FIXME: Maybe the icon size could be read from the parent
+        pixmap = icon.pixmap(qt.QSize(24, 24))
+        self.setPixmap(pixmap)
+
+    def event(self, event: qt.QEvent):
+        if event.type() == qt.QEvent.MouseButtonRelease:
+            self.__redirectClick()
+            self.clicked.emit()
+        return qt.QLabel.event(self, event)
+
+    def __redirectClick(self):
+        if self.__targetAction is None:
+            return
+        action = self.__targetAction
+        menu = action.menu()
+        if menu:
+            action = menu.menuAction()
+            # pos like it is drop by the next widget in the toolbar
+            # this is obviously not always the case
+            pos = self.mapToGlobal(qt.QPoint(self.width(), self.height()))
+            menu.popup(pos)
+        else:
+            action.trigger()
+
+    def redirectClickTo(self, action):
+        """Define the action which will be triggered when the icon is clicked."""
+        self.__targetAction = action