How can I detect mouse clicks in QWebEngineView widget?
I tried this but doesn't work:
class MyWin(QtWidgets.QMainWindow):
def __init__(self, parent=None):
QtWidgets.QWidget.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.ui.view.installEventFilter(self)
def eventFilter(self, obj, event):
if event.type() == event.MouseButtonPress:
print ("Widget click")
return super(QtWidgets.QMainWindow, self).eventFilter(obj, event)
Assuming that the view is the QWebEngineView object and you want to track its mouse event then you should use the focusProxy which is an internal widget that handles these types of events. On the other hand you must correctly apply inheritance.
class MyWin(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super(MyWin, self).__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.ui.view.focusProxy().installEventFilter(self)
def eventFilter(self, obj, event):
if obj is self.ui.view.focusProxy() and event.type() == event.MouseButtonPress:
print("Widget click")
return super(MyWin, self).eventFilter(obj, event)
Related
I want mouse events to reach the appropriate QGraphicsItem but they get no further than the QGraphicsView.
I have reduced my code to 41 lines, commented out event handlers but to no avail. It is either handled by QGraphicsView if that has a handler or, if not, is not caught at all.
I'm sure I'm missing something obvious but I can't see it.
from PyQt5.QtWidgets import *
class MyFrame(QGraphicsView):
def __init__(self, parent=None):
super().__init__(parent)
self.setScene(QGraphicsScene())
self.scene().addItem(Group())
def mouseReleaseEvent(self, event):
print('in QGraphicsView')
return QGraphicsView.mouseReleaseEvent(self, event)
class Group(QGraphicsItemGroup):
def __init__(self, parent=None):
super().__init__()
item = MyEllipse(0, 0, 20, 20)
self.addToGroup(item)
def mouseReleaseEvent(self, event):
print('in QGraphicsItemGroup')
return QGraphicsItemGroup.mouseReleaseEvent(self, event)
class MyEllipse(QGraphicsEllipseItem):
def mouseReleaseEvent(self, event):
print('in QGraphicsEllipseItem')
return QGraphicsEllipseItem.mouseReleaseEvent(self, event)
if __name__ == '__main__':
app = QApplication([])
f = MyFrame()
f.show()
app.exec_()
mouseReleaseEvent is called if and only if the event that the mousePressEvent handles is accepted, so with the following code the event will arrive at QGraphicsItemGroup:
class Group(QGraphicsItemGroup):
def __init__(self, parent=None):
super().__init__()
item = MyEllipse(0, 0, 20, 20)
self.addToGroup(item)
def mousePressEvent(self, event):
QGraphicsItemGroup.mousePressEvent(self, event)
event.accept()
def mouseReleaseEvent(self, event):
print('in QGraphicsItemGroup')
QGraphicsItemGroup.mouseReleaseEvent(self, event)
But as #ekhumoro points out, the QGraphicsItemGroup acts as a single element so events are not transported to the items they handle.
If you want to detect when the item is pressed you can use the following method:
class Group(QGraphicsItemGroup):
def __init__(self, parent=None):
super().__init__()
self._item = MyEllipse(0, 0, 20, 20)
self.addToGroup(self._item)
def mousePressEvent(self, event):
QGraphicsItemGroup.mousePressEvent(self, event)
event.accept()
def mouseReleaseEvent(self, event):
print('in QGraphicsItemGroup')
if self._item.mapToParent(self._item.boundingRect()).containsPoint(event.pos(), Qt.OddEvenFill):
print("_item")
QGraphicsItemGroup.mouseReleaseEvent(self, event)
class widget(QWidget):
...
self.edit=QTextEdit()
def mousePressEvent(self, event):
if event.button()==Qt.LeftButton:
print('test')
self.edit.mousePressEvent(event)
I have tried that but it does not work. It works for the parent widget. Is there anyway I can do it without subclassing the QTextEdit?
In this case you must use an eventFilter in addition to the classes that inherit from QAbstractScrollArea as QTextEdit you must use the viewport():
from PyQt5 import QtCore, QtWidgets
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(Widget, self).__init__(parent)
self.edit = QtWidgets.QTextEdit()
btn = QtWidgets.QPushButton()
le = QtWidgets.QLineEdit()
lay = QtWidgets.QVBoxLayout(self)
for w in (self.edit, btn, le):
lay.addWidget(w)
self.edit.viewport().installEventFilter(self)
def eventFilter(self, obj, event):
if obj is self.edit.viewport() and event.type() == QtCore.QEvent.MouseButtonPress:
if event.button() == QtCore.Qt.LeftButton:
print('test')
return super(Widget, self).eventFilter(obj, event)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = Widget()
w.show()
sys.exit(app.exec_())
I have a QTextBrowser and I want to select a part of the text inside, I need the position of the start and the end of the selection. I want to do that with mousePressEvent and mouseReleaseEvent. Here is my code,
class MainWindow(QMainWindow, TeamInsight.Ui_MainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.setupUi(self)
def set_text(self):
self.textBrowser.setText('test strings are here')
textBrowser is inside a MainWindow. How do I implement mousePressEvent and mouseReleaseEvent for text in textBrowser
If you want to track events and you can not overwrite the class, the solution is to install an event filter, in your case, just the MouseButtonRelease event, we must filter the viewport() of the QTextBrowser:
import sys
from PyQt5.QtCore import QEvent
from PyQt5.QtWidgets import QMainWindow, QApplication
import TeamInsight
class MainWindow(QMainWindow, TeamInsight.Ui_MainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.setupUi(self)
self.browserInput.viewport().installEventFilter(self)
self.browserInput.setText("some text")
def eventFilter(self, obj, event):
if obj is self.browserInput.viewport():
if event.type() == QEvent.MouseButtonRelease:
if self.browserInput.textCursor().hasSelection():
start = self.browserInput.textCursor().selectionStart()
end = self.browserInput.textCursor().selectionEnd()
print(start, end)
elif event.type() == QEvent.MouseButtonPress:
print("event mousePressEvent")
return QMainWindow.eventFilter(self, obj, event)
if __name__ == '__main__':
app = QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
i am trying to capture the key_tab event, but no luck. i realized that it only works if there are no other widgets so the cursor has no where to go only then can i get the event to return. here is a simplified code sample.
class MyCombo(QComboBox):
def __init__(self, parent=None):
super(MyCombo, self).__init__(parent)
self.setEditable(True)
def keyPressEvent(self, event):
if (event.type() == QEvent.KeyPress) and (event.key() == Qt.Key_Tab):
print "tab pressed"
elif event.key() == Qt.Key_Return:
print "return pressed"
else:
QComboBox.keyPressEvent(self, event)
class Form_1(QDialog):
def __init__(self, parent=None):
super(Form_1, self).__init__(parent)
self.combo = MyCombo()
self.line = QLineEdit()
layout = QVBoxLayout()
layout.addWidget(self.combo)
layout.addWidget(self.line)
self.setLayout(layout)
app = QApplication(sys.argv)
form = Form_1()
form.show()
app.exec_()
if i comment out the following two lines
self.line = QLineEdit()
layout.addWidget(self.line)
then it works fine, because there is only one widget left on the form.
where am i going wrong?
Cheers, Joe
Apparently the Key_Tab press event is never passed to any handler but to the setFocus() so in order to intercept the Key_Tab event, we need to implement the event() method itself.
so here is the new code:
class MyCombo(QComboBox):
def __init__(self, parent=None):
super(MyCombo, self).__init__(parent)
self.setEditable(True)
def keyPressEvent(self, event):
if event.key() == Qt.Key_Return:
print "return pressed"
else:
QComboBox.keyPressEvent(self, event)
def event(self, event):
if event.type() == QEvent.KeyPress and event.key() == Qt.Key_Tab:
print "tab pressed"
return False
return QWidget.event(self, event)
class Form_1(QDialog):
def __init__(self, parent=None):
super(Form_1, self).__init__(parent)
self.combo = MyCombo()
self.line = QLineEdit()
layout = QVBoxLayout()
layout.addWidget(self.combo)
layout.addWidget(self.line)
self.setLayout(layout)
I have a QGraphicsScene and I will display a contextmenu. But nothing happend.
Here is my Code:
class graphicsScene(QtGui.QGraphicsScene):
def __init__ (self, parent = None):
super(graphicsScene, self).__init__ (parent)
def contextMenuEvent(self, event):
self.popMenu = QtGui.QMenu()
self.popMenu.addAction(QtGui.QAction('test0', None))
self.popMenu.addAction(QtGui.QAction('test1', None))
self.popMenu.addSeparator()
self.popMenu.addAction(QtGui.QAction('test2', None))
self.popMenu.exec_(event.globalPos())
def mousePressEvent(self, event):
super(graphicsScene, self).mousePressEvent(event)
pos = event.scenePos()
item = self.itemAt(pos)
if event.button() == QtCore.Qt.LeftButton:
#do something
elif event.button() == QtCore.Qt.RightButton:
self.contextMenuEvent(event)
I have no idea how to fix this problem.
Thank you for your help!!!
This may help:
class Table(QtGui.QGraphicsView):
def __init__(self, parent=None):
super(Table, self).__init__(parent)
self.setScene(QtGui.QGraphicsScene())
self.setContextMenuPolicy(QtCore.Qt.DefaultContextMenu)
def contextMenuEvent(self, event):
menu = QtGui.QMenu()
menu.addAction('sample')
menu.exec_(event.globalPos())