我在中查看了一些htmlqwebengineview.setHtml()现在我想在单击html视图中的按钮时运行一个python函数,然后在html视图中添加一些html,这是我调用的函数的输出。具体来说:我希望当按下表单按钮时,我希望删除输入。在
我已经读过这篇question,但它没有告诉我如何在我的html中进行更改、更改它的一部分或附加到它。
示例:
import os
import sys
from PyQt5 import QtCore, QtWidgets, QtWebEngineWidgets, QtWebChannel
from jinja2 import Template
class Element(QtCore.QObject):
def __init__(self, name, parent=None):
super(Element, self).__init__(parent)
self._name = name
@property
def name(self):
return self._name
def script(self):
raise NotImplementedError
class FormObject(Element):
numbersChanged = QtCore.pyqtSignal(str, str)
def script(self):
_script = r"""
var btn = document.getElementById('sub1');
btn.addEventListener("click", function(event){
var number1 = document.getElementById('num1');
var number2 = document.getElementById('num2');
{{name}}.update(number1.value , number2.value);
});
"""
return Template(_script).render(name=self.name)
@QtCore.pyqtSlot(str, str)
def update(self, number1, number2):
self.numbersChanged.emit(number1, number2)
class WebEnginePage(QtWebEngineWidgets.QWebEnginePage):
def __init__(self, *args, **kwargs):
super(WebEnginePage, self).__init__(*args, **kwargs)
self.loadFinished.connect(self.onLoadFinished)
self._objects = []
def add_object(self, obj):
self._objects.append(obj)
@QtCore.pyqtSlot(bool)
def onLoadFinished(self, ok):
if ok:
self.load_qwebchannel()
self.load_objects()
def load_qwebchannel(self):
file = QtCore.QFile(":/qtwebchannel/qwebchannel.js")
if file.open(QtCore.QIODevice.ReadOnly):
content = file.readAll()
file.close()
self.runJavaScript(content.data().decode())
if self.webChannel() is None:
channel = QtWebChannel.QWebChannel(self)
self.setWebChannel(channel)
def load_objects(self):
if self.webChannel() is not None:
objects = {obj.name: obj for obj in self._objects}
self.webChannel().registerObjects(objects)
_script = r"""
{% for obj in objects %}
var {{obj}};
{% endfor %}
new QWebChannel(qt.webChannelTransport, function (channel) {
{% for obj in objects %}
{{obj}} = channel.objects.{{obj}};
{% endfor %}
});
"""
self.runJavaScript(Template(_script).render(objects=objects.keys()))
for obj in self._objects:
if isinstance(obj, Element):
self.runJavaScript(obj.script())
class WebPage(QtWebEngineWidgets.QWebEngineView):
def __init__(self, parent=None):
super().__init__(parent)
page = WebEnginePage(self)
self.setPage(page)
formobject = FormObject("formobject", self)
formobject.numbersChanged.connect(self.on_numbersChanged)
page.add_object(formobject)
filepath = os.path.abspath(
os.path.join(os.path.dirname(__file__), "new.html")
)
self.load(QtCore.QUrl.fromLocalFile(filepath))
@QtCore.pyqtSlot(str, str)
def on_numbersChanged(self, number1, number2):
print(number1, number2)
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
web = WebPage()
web.show()
sys.exit(app.exec_())
^{pr2}$
如果你想从HTML中删除一个元素,你必须用js来做,但是最主要的问题是知道什么时候该做,对于一个页面重新加载的表单来说,你必须在为它加载一个元素之后立即删除它单发QTimer(t,func)可使用适当的“t”。在
考虑到上述情况并使用相同的代码,那么解决方案是
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