在 2013年7月19日星期五UTC+8下午2时25分55秒，Justin Israel写道：
> It depends on where the pointer currently is. If it is still within your app,
> you could catch all wheel events and forward them to the line edit. But if
> your mouse is outside of the app then another widget is free to grab the
> focus away
>
>
>
>
> On Fri, Jul 19, 2013 at 6:05 PM, iMath <[email protected]> wrote:
>
> when you turn the mouse wheel while the mouse is not on the QTextEdit ,the
> scroll bars will not move in such case ,but I still want to move the scroll
> bars by mouse wheel ,so how can I implement this function ?
>
> I know some software like Microsoft Word have this feature
>
>
>
>
>
> import sys
>
> from PyQt4 import QtGui
>
> class BoxLayout(QtGui.QWidget):
>
> def __init__(self, parent=None):
>
> QtGui.QWidget.__init__(self, parent)
>
> self.resize(100, 300)
>
>
>
> ok = QtGui.QPushButton("OK")
>
> cancel = QtGui.QPushButton("Cancel")
>
>
>
> vbox = QtGui.QVBoxLayout()
>
> vbox.addWidget(QtGui.QTextEdit("""This function returns true if the
> contents of the MIME data object, specified by source , can be decoded and
> inserted into the document. It is called for example when during a drag
> operation the mouse enters this widget and it is necessary to determine
> whether it is possible to accept the drag and drop operation.
>
>
>
>
> """))
>
> vbox.addWidget(ok)
>
> vbox.addWidget(cancel)
>
>
>
> self.setLayout(vbox)
>
>
>
> app = QtGui.QApplication(sys.argv)
>
> qb = BoxLayout()
>
> qb.show()
>
> sys.exit(app.exec_())
>
>
>
> --
>
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of course ,the precondition is that the app still has focus
I implement this feature like the following ,but when you move the scroll bars
to the top or bottom by mouse wheel ,an error would occur : maximum recursion
depth exceeded while calling a Python object.
anyone can help ?
code here :
import sys
from PyQt4.QtGui import *
from PyQt4.QtCore import *
class BoxLayout(QWidget):
def __init__(self, parent=None):
super(BoxLayout, self).__init__(parent)
self.resize(100, 300)
ok = QPushButton("OK")
cancel = QPushButton("Cancel")
self.textEdit = QTextEdit("""This function returns true if the contents
of the MIME data object, specified by source , can be decoded and inserted into
the document. It is called for example when during a drag operation the mouse
enters this widget and it is necessary to determine whether it is possible to
accept the drag and drop operation.""")
vbox = QVBoxLayout()
vbox.addWidget(self.textEdit)
vbox.addWidget(ok)
vbox.addWidget(cancel)
self.setLayout(vbox)
# self.textEdit.installEventFilter(self)
#
# def eventFilter(self, obj, event):
# if obj == self.textEdit:
# if event.type() == QEvent.Wheel:
# self.textEdit.wheelEvent(event)
# return True
# else:
# return False
# else:
# return QMainWindow.eventFilter(self, obj, event)
#
def wheelEvent(self, event):
self.textEdit.wheelEvent(event)
app = QApplication(sys.argv)
qb = BoxLayout()
qb.show()
sys.exit(app.exec_())
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