Add InstantTooltipEventFilter

demo.py

@@ -4,6 +4,7 @@
 from qtpy.QtWidgets import QMainWindow, QApplication, QWidget
 
 from qthandy import underline, bold, vbox, btn_popup_menu, ask_confirmation
+from qthandy.filter import InstantTooltipEventFilter
 
 
 class MainWindow(QMainWindow):
@@ -19,6 +20,8 @@ def __init__(self, parent=None):
         bold(self.lbl)
 
         self.btnWithMenu = QPushButton('Btn with menu')
+        self.btnWithMenu.setToolTip('Test tooltip')
+        self.btnWithMenu.installEventFilter(InstantTooltipEventFilter(self.btnWithMenu))
 
         menu = QMenu(self.btnWithMenu)
         menu.addAction('Test', lambda: ask_confirmation('Test'))

qthandy/filter.py

@@ -0,0 +1,18 @@
+from qtpy.QtCore import QObject, QEvent
+from qtpy.QtGui import QCursor
+from qtpy.QtWidgets import QWidget, QToolTip
+
+
+class InstantTooltipEventFilter(QObject):
+    def __init__(self, parent=None):
+        super(InstantTooltipEventFilter, self).__init__(parent)
+
+    def eventFilter(self, watched: QObject, event: QEvent) -> bool:
+        print('event')
+        if isinstance(watched, QWidget) and event.type() == QEvent.Enter:
+            print('show')
+            QToolTip.showText(QCursor.pos(), watched.toolTip())
+        elif event.type() == QEvent.Leave:
+            QToolTip.hideText()
+
+        return super(InstantTooltipEventFilter, self).eventFilter(watched, event)

test/test_filter.py

@@ -0,0 +1,15 @@
+from qtpy.QtWidgets import QPushButton, QToolTip
+
+from qthandy.filter import InstantTooltipEventFilter
+
+
+def test_instant_tooltip(qtbot):
+    btn = QPushButton('Button')
+    qtbot.addWidget(btn)
+    btn.show()
+
+    btn.setToolTip('Test button')
+    btn.installEventFilter(InstantTooltipEventFilter(btn))
+    qtbot.mouseMove(btn)
+
+    assert QToolTip.isVisible()