使用 PyQt4，如何将 mouseMoveEvent 设置为仅在 QMainWindow 中的 QWidget 内工作，而不在 MainWindow 中工作 [英] Using PyQt4, how do you set a mouseMoveEvent to only work inside of a QWidget in a QMainWindow but not in the MainWindow

问题描述

我下面的当前代码适用于更新我的 MainWindow 中 2 个 textBrowsers 中的 x-y 坐标，但是当光标位于 textBrowsers 内时它不起作用.

My current code below works for updating the x-y coordinates in 2 textBrowsers in my MainWindow, but it doesn't work when the cursor is inside of the textBrowsers.

对于此示例，我希望坐标仅在光标在 textBrowser_1 内移动时更新，而不会在其他任何地方移动.

For this example, I want the coordinates to ONLY update when the cursor is moving inside of textBrowser_1 and nowhere else.

from PyQt4 import QtCore
from PyQt4 import QtGui
from PyQt4.QtGui import QApplication, QMainWindow
import sys


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.resize(800, 132)
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.horizontalLayout = QtGui.QHBoxLayout(self.centralwidget)
        self.textBrowser_1 = QtGui.QTextBrowser(self.centralwidget)
        self.horizontalLayout.addWidget(self.textBrowser_1)
        self.textBrowser_2 = QtGui.QTextBrowser(self.centralwidget)
        self.horizontalLayout.addWidget(self.textBrowser_2)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtGui.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22))
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtGui.QStatusBar(MainWindow)
        MainWindow.setStatusBar(self.statusbar)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)


class MyMainScreen(QMainWindow):
    def __init__(self, parent=None):
        QtGui.QMainWindow.__init__(self, parent)
        self.ui = Ui_MainWindow()  # This is from a python export from QtDesigner
        self.ui.setupUi(self)
        self.setMouseTracking(True)
        self.ui.textBrowser_1.installEventFilter(self)
        # self.ui.textBrowser_1.setMouseTracking(True)
        # self.ui.menubar.setMouseTracking(True)
        # self.ui.statusbar.setMouseTracking(True)

    def setMouseTracking(self, flag):
        def recursive_set(parent):
            for child in parent.findChildren(QtCore.QObject):
                try:
                    child.setMouseTracking(flag)
                except:
                    pass
                recursive_set(child)
        QtGui.QWidget.setMouseTracking(self, flag)
        recursive_set(self)



    def mouseMoveEvent(self, event):
        self.ui.textBrowser_1.setText(str(event.x()))
        self.ui.textBrowser_2.setText(str(event.y()))
        QtGui.QMainWindow.mouseMoveEvent(self, event)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    mainscreen = MyMainScreen()
    mainscreen.show()
    app.exec_()

程序是这样的:mouseTest

推荐答案

从您的代码示例来看，您可能已经尝试过事件过滤器，但这可能是最好的解决方案.诀窍是将它安装在小部件的 viewport 上(如果它有一个):

From your code example, it looks like you may have already tried an event-filter, but that is probably the best solution. The trick is to install it on the viewport of the widget (if it has one):

class MyMainScreen(QMainWindow):
    def __init__(self, parent=None):
        QtGui.QMainWindow.__init__(self, parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        self.ui.textBrowser_1.setMouseTracking(True)
        self.ui.textBrowser_1.viewport().installEventFilter(self)

    def eventFilter(self, source, event):
        if event.type() == QtCore.QEvent.MouseMove:
            self.ui.textBrowser_1.setText(str(event.x()))
            self.ui.textBrowser_2.setText(str(event.y()))
        return QtGui.QMainWindow.eventFilter(self, source, event)

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