无法在 Pyqt5 中更改 qtextedit 的背景边框，有啥建议吗？
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【中文标题】无法在 Pyqt5 中更改 qtextedit 的背景边框，有啥建议吗？【英文标题】：can't change backgrund border of qtextedit in Pyqt5, any suggestions?无法在 Pyqt5 中更改 qtextedit 的背景边框，有什么建议吗？ 【发布时间】：2021-01-11 21:26:07 【问题描述】：我无法更改文本的背景形状。有可能还是我应该尝试另一种方法来解决它。谢谢。这是我到目前为止所拥有的。我尝试在 qtextedit 中将 broder-radius 添加到 html，但每当我尝试时，QtCreator 不接受我所做的并将代码重置为我现在共享的当前 html。
font = QtGui.QFont()
font.setFamily("MS Shell Dlg 2")
font.setPointSize(8)
font.setStrikeOut(False)
self.ui.textEdit.setTextBackgroundColor(QtGui.QColor(143,188,143))
self.ui.textEdit.setAlignment(QtCore.Qt.AlignRight)
self.ui.textEdit.append("Here is the background i want to change. Iwant it to be round instead of a corner.")
self.ui.textEdit.setLineWrapMode(self.ui.textEdit_2.LineWrapMode(3))
self.ui.textEdit.setLineWrapColumnOrWidth(40)
self.ui.textEdit.setWordWrapMode(1)
self.ui.textEdit.append("")
self.ui.textEdit.setFont(font)
self.textEdit_2.setHtml(_translate("MainWindow", "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"
"<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
"p, li white-space: pre-wrap; \n"
"</style></head><body style=\" font-family:\'MS Shell Dlg 2\'; font-size:7.8pt; font-weight:400; font-style:normal;\">\n"
"<p style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\">Mit der Nutzung Des Chatbots stimmen Sie der Nutzung unserer AGB zu.</p></body></html>"))
这是我尝试运行的整个代码。由于任何原因，它没有显示纯文本，并给了我以下错误：
QPainter::setPen: Painter not active
QPainter::setBrush: Painter not active
QWidget::paintEngine: Should no longer be called
QPainter::begin: Paint device returned engine == 0, type: 1
QPainter::setPen: Painter not active
QPainter::setBrush: Painter not active
# -*- coding: utf-8 -*-
import sys, random
from PyQt5 import QtWidgets, QtGui, QtCore
from untitled3.mainwindow import Ui_MainWindow
import json
import requests
app = QtWidgets.QApplication(sys.argv)
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent = None):
super().__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
#self.setWindowFlags(QtCore.Qt.FramelessWindowHint)
#self.setAttribute(QtCore.Qt.WA_TranslucentBackground)
self.willkommen()
def willkommen(self, parent = None):
font = QtGui.QFont()
font.setFamily("MS Shell Dlg 2")
font.setPointSize(8)
font.setStrikeOut(False)
self.ui.textEdit.setLineWrapMode(self.ui.textEdit.LineWrapMode(3))
self.ui.textEdit.setLineWrapColumnOrWidth(40)
self.ui.textEdit.setWordWrapMode(1)
self.ui.textEdit.setFont(font)
self.ui.textEdit.setPlainText("Willkommen. Ich bin Evossistant und beantworte Ihre Fragen.\
Bitte lesen Sie die AGB, bevor Sie den Chatbot nutzen.")
self.ui.textEdit.append("")
self.ui.textEdit.setAlignment(QtCore.Qt.AlignRight)
self.ui.lineEdit.returnPressed.connect(self.ui.pushButton.click)
self.ui.pushButton.clicked.connect(self.nutzereingabe)
self.ui.textEdit.moveCursor(QtGui.QTextCursor.End)
self.ui.textEdit.paintEvent = self.paintEvent(None)
def paintEvent(self, event):
painter = QtGui.QPainter(self.ui.textEdit.viewport())
pen = QtGui.QPen(QtGui.QColor(143, 188, 143, 50))
pen.setStyle(QtCore.Qt.SolidLine)
pen.setCapStyle(QtCore.Qt.RoundCap)
brush = QtGui.QBrush(QtGui.QColor(143, 188, 143, 50))
painter.setPen(pen)
painter.setBrush(brush)
painter.setRenderHint(QtGui.QPainter.Antialiasing)
doc = self.ui.textEdit.document()
margin = doc.documentMargin()
rightAlignmentStart = self.ui.textEdit.size().width()
natruralTextWidth = 0
unitedBlockRect = QtCore.QRectF()
for b in range(doc.blockCount()):
block = doc.findBlockByNumber(b)
blockRect = doc.documentLayout().blockBoundingRect(block)
layout = block.layout()
lineRect = QtCore.QRectF()
for k in range(layout.lineCount()):
line = layout.lineAt(k)
linerect = line.rect()
naturalTextWidth = max(line.naturalTextWidth(), natruralTextWidth)
#if self.ui.textEdit.alignment() == QtCore.Qt.AlignRight:
rightAlignmentStart = min(rightAlignmentStart, self.ui.textEdit.size().width() - naturalTextWidth - margin)
lineRect = lineRect.united(linerect)
unitedBlockRect = blockRect.united(lineRect)
unitedBlockRect.setX(rightAlignmentStart - 20)
#I think it is better you keep a extra width.
unitedBlockRect.setWidth(unitedBlockRect.width() )
painter.drawRoundedRect(unitedBlockRect, 10, 10)
#return QtWidgets.QTextEdit.paintEvent(self, event)
def nutzereingabe(self):
text = self.ui.lineEdit.text()
self.ui.lineEdit.clear()
#self.ui.textEdit.setTextBackgroundColor(QtGui.QColor(176, 224, 230))
self.ui.textEdit.setAlignment(QtCore.Qt.AlignLeft)
self.ui.textEdit.append(text)
self.ui.textEdit.append("")
Dict_to_send = "sender": "user_name", "message": text
print(Dict_to_send)
self.request(Dict_to_send)
def request(self,Dict_to_send):
Url = "http://127.0.0.1:5005/webhooks/rest/webhook"
r = requests.post(Url, json = Dict_to_send)
print(r.text)
b = r.text
if "text" in b:
a = (b.strip('"]').split(":")[2])
message = a.replace('"', "")
self.botausgabe(message)
else:
message = "keine Antwort"
self.botausgabe(message)
def botausgabe(self, message):
#self.ui.textEdit.setTextBackgroundColor(QtGui.QColor(143,188,143))
self.ui.textEdit.setAlignment(QtCore.Qt.AlignRight)
self.ui.textEdit.append(message)
self.ui.textEdit.append("")
window = MainWindow()
window.show()
sys.exit(app.exec_())
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'C:/Users/Polat/Desktop/ChatGUI/untitled3\mainwindow.ui'
#
# Created by: PyQt5 UI code generator 5.15.1
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again. Do not edit this file unless you know what you are doing.
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.setWindowModality(QtCore.Qt.NonModal)
MainWindow.setEnabled(True)
MainWindow.resize(500, 600)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(MainWindow.sizePolicy().hasHeightForWidth())
MainWindow.setSizePolicy(sizePolicy)
MainWindow.setMinimumSize(QtCore.QSize(300, 300))
MainWindow.setMaximumSize(QtCore.QSize(700, 16777215))
font = QtGui.QFont()
font.setFamily("Arial")
font.setPointSize(14)
font.setStrikeOut(False)
MainWindow.setFont(font)
icon = QtGui.QIcon()
icon.addPixmap(QtGui.QPixmap("../../Desktop/ChatbotProgrammierung/evocenta.jpg"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
MainWindow.setWindowIcon(icon)
MainWindow.setWindowOpacity(255.0)
MainWindow.setAutoFillBackground(False)
MainWindow.setStyleSheet("QMainWindow \n"
" background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 255), stop:1 rgba(255, 255, 255, 200));\n"
"\n"
"\n"
"QTabWidget \n"
" \n"
" border:None;\n"
"\n"
"\n"
"QTabWidget::pane \n"
"border: 0; \n"
"\n"
"\n"
"\n"
"\n"
"\n"
"QWidget \n"
"background-color: qlineargradient(spread:reflect, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 100), stop:0.88 rgba(255, 255, 255, 255), stop:0.92 rgba(75, 111, 180, 150), stop:0.96 rgba(148, 27, 128, 150), stop:1 rgba(231, 170, 0, 150));\n"
"\n"
" Border:none;\n"
" \n"
"\n"
"QFrame \n"
" background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 255), stop:1 rgba(255, 255, 255, 255));\n"
" Border-radius: 10px;\n"
"\n"
"QPushButton\n"
"Border-radius: 10px;\n"
"QLineEdit\n"
"Border-radius: 10px;")
MainWindow.setInputMethodHints(QtCore.Qt.ImhNone)
MainWindow.setIconSize(QtCore.QSize(30, 30))
MainWindow.setToolButtonStyle(QtCore.Qt.ToolButtonIconOnly)
MainWindow.setDockOptions(QtWidgets.QMainWindow.AllowTabbedDocks|QtWidgets.QMainWindow.AnimatedDocks)
self.widget = QtWidgets.QWidget(MainWindow)
self.widget.setEnabled(True)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.widget.sizePolicy().hasHeightForWidth())
self.widget.setSizePolicy(sizePolicy)
self.widget.setMinimumSize(QtCore.QSize(300, 300))
self.widget.setStyleSheet("")
self.widget.setObjectName("widget")
self.horizontalLayout_3 = QtWidgets.QHBoxLayout(self.widget)
self.horizontalLayout_3.setObjectName("horizontalLayout_3")
self.frame = QtWidgets.QFrame(self.widget)
self.frame.setEnabled(True)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.frame.sizePolicy().hasHeightForWidth())
self.frame.setSizePolicy(sizePolicy)
self.frame.setAutoFillBackground(False)
self.frame.setStyleSheet("")
self.frame.setInputMethodHints(QtCore.Qt.ImhNone)
self.frame.setFrameShape(QtWidgets.QFrame.NoFrame)
self.frame.setFrameShadow(QtWidgets.QFrame.Sunken)
self.frame.setObjectName("frame")
self.horizontalLayout_4 = QtWidgets.QHBoxLayout(self.frame)
self.horizontalLayout_4.setObjectName("horizontalLayout_4")
self.tabWidget = QtWidgets.QTabWidget(self.frame)
self.tabWidget.setAutoFillBackground(False)
self.tabWidget.setStyleSheet("QTabBar::tab \n"
"background: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 255), stop:1 rgba(255, 255, 255, 255));\n"
" border-top-left-radius: 5px;\n"
" border-top-right-radius: 5px;\n"
" border-bottom-left-radius: 5px;\n"
" border-bottom-right-radius: 5px;\n"
" min-width: 14ex;\n"
" padding: 2px;\n"
"\n"
"\n"
"QTabBar::tab:selected, QTabBar::tab:hover \n"
" background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,\n"
" stop: 0 #fafafa, stop: 0.4 #f4f4f4,\n"
" stop: 0.5 #e7e7e7, stop: 1.0 #fafafa);\n"
"\n"
"")
self.tabWidget.setTabPosition(QtWidgets.QTabWidget.North)
self.tabWidget.setTabShape(QtWidgets.QTabWidget.Rounded)
self.tabWidget.setElideMode(QtCore.Qt.ElideNone)
self.tabWidget.setUsesScrollButtons(True)
self.tabWidget.setTabsClosable(False)
self.tabWidget.setMovable(False)
self.tabWidget.setTabBarAutoHide(False)
self.tabWidget.setObjectName("tabWidget")
self.tab = QtWidgets.QWidget()
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.tab.sizePolicy().hasHeightForWidth())
self.tab.setSizePolicy(sizePolicy)
self.tab.setAutoFillBackground(False)
self.tab.setStyleSheet("QWidget \n"
" background-color: rgba(255, 255, 255, 50);\n"
" Border-radius: 10px;\n"
"")
self.tab.setObjectName("tab")
self.verticalLayout_5 = QtWidgets.QVBoxLayout(self.tab)
self.verticalLayout_5.setObjectName("verticalLayout_5")
self.verticalLayout_2 = QtWidgets.QVBoxLayout()
self.verticalLayout_2.setObjectName("verticalLayout_2")
self.frame_chat1 = QtWidgets.QFrame(self.tab)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.frame_chat1.sizePolicy().hasHeightForWidth())
self.frame_chat1.setSizePolicy(sizePolicy)
self.frame_chat1.setStyleSheet("QFrame \n"
" background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 255), stop:1 rgba(255, 255, 255, 255));\n"
" Border-radius: 10px;\n"
"")
self.frame_chat1.setFrameShape(QtWidgets.QFrame.Box)
self.frame_chat1.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame_chat1.setObjectName("frame_chat1")
self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.frame_chat1)
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.textEdit = QtWidgets.QTextEdit(self.frame_chat1)
self.textEdit.setStyleSheet("QTextEdit \n"
" background-color: rgba(255, 255, 255, 100);\n"
" border-color: rgb(105, 210, 255);\n"
" border-radius: 10px;\n"
"\n"
"")
self.textEdit.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.textEdit.setSizeAdjustPolicy(QtWidgets.QAbstractScrollArea.AdjustIgnored)
self.textEdit.setReadOnly(True)
self.textEdit.setMarkdown("")
self.textEdit.setObjectName("textEdit")
self.horizontalLayout_2.addWidget(self.textEdit)
self.verticalLayout_2.addWidget(self.frame_chat1)
self.frame_chat2 = QtWidgets.QFrame(self.tab)
self.frame_chat2.setMinimumSize(QtCore.QSize(0, 0))
self.frame_chat2.setMaximumSize(QtCore.QSize(16777215, 50))
self.frame_chat2.setStyleSheet("QFrame \n"
" background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 255), stop:1 rgba(255, 255, 255, 255));\n"
" Border-radius: 10px;\n"
"\n"
"\n"
"")
self.frame_chat2.setFrameShape(QtWidgets.QFrame.NoFrame)
self.frame_chat2.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame_chat2.setObjectName("frame_chat2")
self.horizontalLayout = QtWidgets.QHBoxLayout(self.frame_chat2)
self.horizontalLayout.setObjectName("horizontalLayout")
self.lineEdit = QtWidgets.QLineEdit(self.frame_chat2)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.lineEdit.sizePolicy().hasHeightForWidth())
self.lineEdit.setSizePolicy(sizePolicy)
self.lineEdit.setMinimumSize(QtCore.QSize(0, 30))
self.lineEdit.setStyleSheet("QLineEdit \n"
" background-color: rgba(255, 255, 255, 100);\n"
" \n"
"")
self.lineEdit.setObjectName("lineEdit")
self.horizontalLayout.addWidget(self.lineEdit)
self.pushButton = QtWidgets.QPushButton(self.frame_chat2)
self.pushButton.setMinimumSize(QtCore.QSize(70, 30))
self.pushButton.setStyleSheet("QPushButton \n"
" background-color: rgba(115, 174, 76, 100);\n"
" \n"
"")
self.pushButton.setObjectName("pushButton")
self.horizontalLayout.addWidget(self.pushButton)
self.verticalLayout_2.addWidget(self.frame_chat2)
self.verticalLayout_5.addLayout(self.verticalLayout_2)
self.tabWidget.addTab(self.tab, "")
self.tab_2 = QtWidgets.QWidget()
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.tab_2.sizePolicy().hasHeightForWidth())
self.tab_2.setSizePolicy(sizePolicy)
self.tab_2.setAutoFillBackground(False)
self.tab_2.setStyleSheet("QWidget \n"
" background-color: rgba(255, 255, 255, 50);\n"
" Border-radius: 10px;\n"
"")
self.tab_2.setObjectName("tab_2")
self.horizontalLayout_5 = QtWidgets.QHBoxLayout(self.tab_2)
self.horizontalLayout_5.setObjectName("horizontalLayout_5")
self.frame_agb = QtWidgets.QFrame(self.tab_2)
self.frame_agb.setStyleSheet("QFrame \n"
" background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 255), stop:1 rgba(255, 255, 255, 255));\n"
" Border-radius: 10px;\n"
"")
self.frame_agb.setFrameShape(QtWidgets.QFrame.NoFrame)
self.frame_agb.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame_agb.setObjectName("frame_agb")
self.verticalLayout = QtWidgets.QVBoxLayout(self.frame_agb)
self.verticalLayout.setObjectName("verticalLayout")
self.textEdit_2 = QtWidgets.QTextEdit(self.frame_agb)
self.textEdit_2.setAutoFillBackground(False)
self.textEdit_2.setStyleSheet("QTextEdit \n"
" background-color: rgba(255, 255, 255, 100);\n"
" border-color: rgb(105, 210, 255);\n"
" border-radius: 10px;\n"
"")
self.textEdit_2.setFrameShape(QtWidgets.QFrame.NoFrame)
self.textEdit_2.setReadOnly(True)
self.textEdit_2.setObjectName("textEdit_2")
self.verticalLayout.addWidget(self.textEdit_2)
self.horizontalLayout_5.addWidget(self.frame_agb)
self.tabWidget.addTab(self.tab_2, "")
self.horizontalLayout_4.addWidget(self.tabWidget)
self.horizontalLayout_3.addWidget(self.frame)
MainWindow.setCentralWidget(self.widget)
self.retranslateUi(MainWindow)
self.tabWidget.setCurrentIndex(0)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "Evosisstant - Your Digital Guide"))
self.textEdit.setHtml(_translate("MainWindow", "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"
"<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
"p, li white-space: pre-wrap; \n"
"</style></head><body style=\" font-family:\'MS Shell Dlg 2\'; font-size:7.8pt; font-weight:400; font-style:normal;\">\n"
"<h1 style=\"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-size:xx-large; font-weight:600;\"><br /></h1></body></html>"))
self.lineEdit.setPlaceholderText(_translate("MainWindow", "Schreiben Sie hier..."))
self.pushButton.setText(_translate("MainWindow", "Senden"))
self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab), _translate("MainWindow", "Chat"))
self.textEdit_2.setHtml(_translate("MainWindow", "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"
"<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
"p, li white-space: pre-wrap; \n"
"</style></head><body style=\" font-family:\'MS Shell Dlg 2\'; font-size:7.8pt; font-weight:400; font-style:normal;\">\n"
"<p style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\">Mit der Nutzung Des Chatbots stimmen Sie der Nutzung unserer AGB zu.</p></body></html>"))
self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_2), _translate("MainWindow", "Nutzungsbedingungen"))[![enter image description here][1]][1]![enter image description here][2]
【问题讨论】：
你能分享你的代码吗？ 如果缺少任何东西，我会尽快分享 你能试着更好地解释一下自己吗？不清楚标题中的“背景边框”是什么意思，因为在问题的正文中，您还提到了“文本的背景形状”，我真的不明白您想要做什么。 感谢您的回复。我在设置的文本后面做了一个深绿色的背景。我想将它的形状从矩形更改为圆形。使背景形状具有圆形边框或圆形。我很抱歉我的英语不好 你的文字是否都采用了背景色，它的颜色是否完全一样？ 【参考方案1】：更新2
对不起，我误会了……你给了我完整的代码，我从来不知道。在这种情况下，即使我使用 installEventFilter，paint 的内容也会被你的 setStyleSheet 设置透支，所以开。
所以我发现我可以创建 QTextEdit 的子类，我做到了。 请重试我的代码。
好的，我看到你的更新了，我觉得你对eventFilter的系统理解不够。事件从父到子流。（在这种情况下，很容易说，（QObject）→QApplication→QMainWindow→QTextEdit )
通常，事件在类的子类中被直接覆盖。
因为要绘制QTextEdit的视口，所以必须重写QTextEdit的子类中的paintEvent。但是在这种情况下，你是用Qt-Designer制作的GUI。
您不能在QTextEdit 中编写覆盖paintEvent 的代码。
主要的方法是覆盖paintEvent获得相同的效果，为此，您可以安装eventFilter。在QMainWindow时，您可以更改事件流。这里，现在，我只在self.ui.textEdit的情况由
If obj is self.ui.textEdit 标志。
# -*- coding: utf-8 -*-
import sys, random
from PyQt5 import QtWidgets, QtGui, QtCore
import json
import requests
#we can override if this setting is !
class TextEdit(QtWidgets.QTextEdit):
def __init__(self, parent=None):
super(TextEdit, self).__init__(parent)
def paintEvent(self, event):
painter = QtGui.QPainter(self.viewport())
pen = QtGui.QPen(QtGui.QColor(143, 188, 143, 255))
pen.setStyle(QtCore.Qt.SolidLine)
pen.setCapStyle(QtCore.Qt.RoundCap)
brush = QtGui.QBrush(QtGui.QColor(143, 188, 143, 255))
painter.setPen(pen)
painter.setBrush(brush)
painter.setRenderHint(QtGui.QPainter.Antialiasing)
doc = self.document()
margin = doc.documentMargin()
rightAlignmentStart = self.size().width()
natruralTextWidth = 0
unitedBlockRect = QtCore.QRectF()
for b in range(doc.blockCount()):
block = doc.findBlockByNumber(b)
blockRect = doc.documentLayout().blockBoundingRect(block)
layout = block.layout()
lineRect = QtCore.QRectF()
for k in range(layout.lineCount()):
line = layout.lineAt(k)
linerect = line.rect()
naturalTextWidth = max(line.naturalTextWidth(), natruralTextWidth)
#if self.ui.textEdit.alignment() == QtCore.Qt.AlignRight:
rightAlignmentStart = min(rightAlignmentStart, self.size().width() - naturalTextWidth - margin)
lineRect = lineRect.united(linerect)
unitedBlockRect = blockRect.united(lineRect)
unitedBlockRect.setX(rightAlignmentStart - 20)
#I think it is better you keep a extra width.
unitedBlockRect.setWidth(unitedBlockRect.width() )
painter.drawRoundedRect(unitedBlockRect, 10, 10)
return QtWidgets.QTextEdit.paintEvent(self, event)
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.setWindowModality(QtCore.Qt.NonModal)
MainWindow.setEnabled(True)
MainWindow.resize(500, 600)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(MainWindow.sizePolicy().hasHeightForWidth())
MainWindow.setSizePolicy(sizePolicy)
MainWindow.setMinimumSize(QtCore.QSize(300, 300))
MainWindow.setMaximumSize(QtCore.QSize(700, 16777215))
font = QtGui.QFont()
font.setFamily("Arial")
font.setPointSize(14)
font.setStrikeOut(False)
MainWindow.setFont(font)
icon = QtGui.QIcon()
icon.addPixmap(QtGui.QPixmap("../../Desktop/ChatbotProgrammierung/evocenta.jpg"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
MainWindow.setWindowIcon(icon)
MainWindow.setWindowOpacity(255.0)
MainWindow.setAutoFillBackground(False)
MainWindow.setStyleSheet("QMainWindow \n"
" background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 255), stop:1 rgba(255, 255, 255, 200));\n"
"\n"
"\n"
"QTabWidget \n"
" \n"
" border:None;\n"
"\n"
"\n"
"QTabWidget::pane \n"
"border: 0; \n"
"\n"
"\n"
"\n"
"\n"
"\n"
"QWidget \n"
"background-color: qlineargradient(spread:reflect, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 100), stop:0.88 rgba(255, 255, 255, 255), stop:0.92 rgba(75, 111, 180, 150), stop:0.96 rgba(148, 27, 128, 150), stop:1 rgba(231, 170, 0, 150));\n"
"\n"
" Border:none;\n"
" \n"
"\n"
"QFrame \n"
" background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 255), stop:1 rgba(255, 255, 255, 255));\n"
" Border-radius: 10px;\n"
"\n"
"QPushButton\n"
"Border-radius: 10px;\n"
"QLineEdit\n"
"Border-radius: 10px;")
MainWindow.setInputMethodHints(QtCore.Qt.ImhNone)
MainWindow.setIconSize(QtCore.QSize(30, 30))
MainWindow.setToolButtonStyle(QtCore.Qt.ToolButtonIconOnly)
MainWindow.setDockOptions(QtWidgets.QMainWindow.AllowTabbedDocks|QtWidgets.QMainWindow.AnimatedDocks)
self.widget = QtWidgets.QWidget(MainWindow)
self.widget.setEnabled(True)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.widget.sizePolicy().hasHeightForWidth())
self.widget.setSizePolicy(sizePolicy)
self.widget.setMinimumSize(QtCore.QSize(300, 300))
self.widget.setStyleSheet("")
self.widget.setObjectName("widget")
self.horizontalLayout_3 = QtWidgets.QHBoxLayout(self.widget)
self.horizontalLayout_3.setObjectName("horizontalLayout_3")
self.frame = QtWidgets.QFrame(self.widget)
self.frame.setEnabled(True)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.frame.sizePolicy().hasHeightForWidth())
self.frame.setSizePolicy(sizePolicy)
self.frame.setAutoFillBackground(False)
self.frame.setStyleSheet("")
self.frame.setInputMethodHints(QtCore.Qt.ImhNone)
self.frame.setFrameShape(QtWidgets.QFrame.NoFrame)
self.frame.setFrameShadow(QtWidgets.QFrame.Sunken)
self.frame.setObjectName("frame")
self.horizontalLayout_4 = QtWidgets.QHBoxLayout(self.frame)
self.horizontalLayout_4.setObjectName("horizontalLayout_4")
self.tabWidget = QtWidgets.QTabWidget(self.frame)
self.tabWidget.setAutoFillBackground(False)
self.tabWidget.setStyleSheet("QTabBar::tab \n"
"background: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 255), stop:1 rgba(255, 255, 255, 255));\n"
" border-top-left-radius: 5px;\n"
" border-top-right-radius: 5px;\n"
" border-bottom-left-radius: 5px;\n"
" border-bottom-right-radius: 5px;\n"
" min-width: 14ex;\n"
" padding: 2px;\n"
"\n"
"\n"
"QTabBar::tab:selected, QTabBar::tab:hover \n"
" background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,\n"
" stop: 0 #fafafa, stop: 0.4 #f4f4f4,\n"
" stop: 0.5 #e7e7e7, stop: 1.0 #fafafa);\n"
"\n"
"")
self.tabWidget.setTabPosition(QtWidgets.QTabWidget.North)
self.tabWidget.setTabShape(QtWidgets.QTabWidget.Rounded)
self.tabWidget.setElideMode(QtCore.Qt.ElideNone)
self.tabWidget.setUsesScrollButtons(True)
self.tabWidget.setTabsClosable(False)
self.tabWidget.setMovable(False)
self.tabWidget.setTabBarAutoHide(False)
self.tabWidget.setObjectName("tabWidget")
self.tab = QtWidgets.QWidget()
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.tab.sizePolicy().hasHeightForWidth())
self.tab.setSizePolicy(sizePolicy)
self.tab.setAutoFillBackground(False)
self.tab.setStyleSheet("QWidget \n"
" background-color: rgba(255, 255, 255, 50);\n"
" Border-radius: 10px;\n"
"")
self.tab.setObjectName("tab")
self.verticalLayout_5 = QtWidgets.QVBoxLayout(self.tab)
self.verticalLayout_5.setObjectName("verticalLayout_5")
self.verticalLayout_2 = QtWidgets.QVBoxLayout()
self.verticalLayout_2.setObjectName("verticalLayout_2")
self.frame_chat1 = QtWidgets.QFrame(self.tab)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.frame_chat1.sizePolicy().hasHeightForWidth())
self.frame_chat1.setSizePolicy(sizePolicy)
self.frame_chat1.setStyleSheet("QFrame \n"
" background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 255), stop:1 rgba(255, 255, 255, 255));\n"
" Border-radius: 10px;\n"
"")
self.frame_chat1.setFrameShape(QtWidgets.QFrame.Box)
self.frame_chat1.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame_chat1.setObjectName("frame_chat1")
self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.frame_chat1)
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.textEdit = TextEdit(self.frame_chat1)
self.textEdit.setStyleSheet("QTextEdit \n"
" background-color: rgba(255, 255, 255, 100);\n"
" border-color: rgb(105, 210, 255);\n"
" border-radius: 10px;\n"
"\n"
"")
self.textEdit.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.textEdit.setSizeAdjustPolicy(QtWidgets.QAbstractScrollArea.AdjustIgnored)
self.textEdit.setReadOnly(True)
self.textEdit.setMarkdown("")
self.textEdit.setObjectName("textEdit")
self.horizontalLayout_2.addWidget(self.textEdit)
self.verticalLayout_2.addWidget(self.frame_chat1)
self.frame_chat2 = QtWidgets.QFrame(self.tab)
self.frame_chat2.setMinimumSize(QtCore.QSize(0, 0))
self.frame_chat2.setMaximumSize(QtCore.QSize(16777215, 50))
self.frame_chat2.setStyleSheet("QFrame \n"
" background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 255), stop:1 rgba(255, 255, 255, 255));\n"
" Border-radius: 10px;\n"
"\n"
"\n"
"")
self.frame_chat2.setFrameShape(QtWidgets.QFrame.NoFrame)
self.frame_chat2.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame_chat2.setObjectName("frame_chat2")
self.horizontalLayout = QtWidgets.QHBoxLayout(self.frame_chat2)
self.horizontalLayout.setObjectName("horizontalLayout")
self.lineEdit = QtWidgets.QLineEdit(self.frame_chat2)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.lineEdit.sizePolicy().hasHeightForWidth())
self.lineEdit.setSizePolicy(sizePolicy)
self.lineEdit.setMinimumSize(QtCore.QSize(0, 30))
self.lineEdit.setStyleSheet("QLineEdit \n"
" background-color: rgba(255, 255, 255, 100);\n"
" \n"
"")
self.lineEdit.setObjectName("lineEdit")
self.horizontalLayout.addWidget(self.lineEdit)
self.pushButton = QtWidgets.QPushButton(self.frame_chat2)
self.pushButton.setMinimumSize(QtCore.QSize(70, 30))
self.pushButton.setStyleSheet("QPushButton \n"
" background-color: rgba(115, 174, 76, 100);\n"
" \n"
"")
self.pushButton.setObjectName("pushButton")
self.horizontalLayout.addWidget(self.pushButton)
self.verticalLayout_2.addWidget(self.frame_chat2)
self.verticalLayout_5.addLayout(self.verticalLayout_2)
self.tabWidget.addTab(self.tab, "")
self.tab_2 = QtWidgets.QWidget()
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.tab_2.sizePolicy().hasHeightForWidth())
self.tab_2.setSizePolicy(sizePolicy)
self.tab_2.setAutoFillBackground(False)
self.tab_2.setStyleSheet("QWidget \n"
" background-color: rgba(255, 255, 255, 50);\n"
" Border-radius: 10px;\n"
"")
self.tab_2.setObjectName("tab_2")
self.horizontalLayout_5 = QtWidgets.QHBoxLayout(self.tab_2)
self.horizontalLayout_5.setObjectName("horizontalLayout_5")
self.frame_agb = QtWidgets.QFrame(self.tab_2)
self.frame_agb.setStyleSheet("QFrame \n"
" background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(115, 174, 76, 255), stop:1 rgba(255, 255, 255, 255));\n"
" Border-radius: 10px;\n"
"")
self.frame_agb.setFrameShape(QtWidgets.QFrame.NoFrame)
self.frame_agb.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame_agb.setObjectName("frame_agb")
self.verticalLayout = QtWidgets.QVBoxLayout(self.frame_agb)
self.verticalLayout.setObjectName("verticalLayout")
self.textEdit_2 = QtWidgets.QTextEdit(self.frame_agb)
self.textEdit_2.setAutoFillBackground(False)
self.textEdit_2.setStyleSheet("QTextEdit \n"
" background-color: rgba(255, 255, 255, 100);\n"
" border-color: rgb(105, 210, 255);\n"
" border-radius: 10px;\n"
"")
self.textEdit_2.setFrameShape(QtWidgets.QFrame.NoFrame)
self.textEdit_2.setReadOnly(True)
self.textEdit_2.setObjectName("textEdit_2")
self.verticalLayout.addWidget(self.textEdit_2)
self.horizontalLayout_5.addWidget(self.frame_agb)
self.tabWidget.addTab(self.tab_2, "")
self.horizontalLayout_4.addWidget(self.tabWidget)
self.horizontalLayout_3.addWidget(self.frame)
MainWindow.setCentralWidget(self.widget)
self.retranslateUi(MainWindow)
self.tabWidget.setCurrentIndex(0)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "Evosisstant - Your Digital Guide"))
self.textEdit.setHtml(_translate("MainWindow", "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"
"<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
"p, li white-space: pre-wrap; \n"
"</style></head><body style=\" font-family:\'MS Shell Dlg 2\'; font-size:7.8pt; font-weight:400; font-style:normal;\">\n"
"<h1 style=\"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-size:xx-large; font-weight:600;\"><br /></h1></body></html>"))
self.lineEdit.setPlaceholderText(_translate("MainWindow", "Schreiben Sie hier..."))
self.pushButton.setText(_translate("MainWindow", "Senden"))
self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab), _translate("MainWindow", "Chat"))
self.textEdit_2.setHtml(_translate("MainWindow", "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"
"<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
"p, li white-space: pre-wrap; \n"
"</style></head><body style=\" font-family:\'MS Shell Dlg 2\'; font-size:7.8pt; font-weight:400; font-style:normal;\">\n"
"<p style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\">Mit der Nutzung Des Chatbots stimmen Sie der Nutzung unserer AGB zu.</p></body></html>"))
self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_2), _translate("MainWindow", "Nutzungsbedingungen"))
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent = None):
super().__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
#self.setWindowFlags(QtCore.Qt.FramelessWindowHint)
#self.setAttribute(QtCore.Qt.WA_TranslucentBackground)
self.willkommen()
def willkommen(self, parent = None):
font = QtGui.QFont()
font.setFamily("MS Shell Dlg 2")
font.setPointSize(8)
font.setStrikeOut(False)
self.ui.textEdit.setLineWrapMode(self.ui.textEdit.LineWrapMode(3))
self.ui.textEdit.setLineWrapColumnOrWidth(40)
self.ui.textEdit.setWordWrapMode(1)
self.ui.textEdit.setFont(font)
self.ui.textEdit.setPlainText("Willkommen. Ich bin Evossistant und beantworte Ihre Fragen.\
Bitte lesen Sie die AGB, bevor Sie den Chatbot nutzen.")
self.ui.textEdit.append("")
self.ui.textEdit.setAlignment(QtCore.Qt.AlignRight)
self.ui.lineEdit.returnPressed.connect(self.ui.pushButton.click)
self.ui.pushButton.clicked.connect(self.nutzereingabe)
self.ui.textEdit.moveCursor(QtGui.QTextCursor.End)
def nutzereingabe(self):
text = self.ui.lineEdit.text()
self.ui.lineEdit.clear()
#self.ui.textEdit.setTextBackgroundColor(QtGui.QColor(176, 224, 230))
self.ui.textEdit.setAlignment(QtCore.Qt.AlignLeft)
self.ui.textEdit.append(text)
self.ui.textEdit.append("")
Dict_to_send = "sender": "user_name", "message": text
print(Dict_to_send)
self.request(Dict_to_send)
def request(self,Dict_to_send):
Url = "http://127.0.0.1:5005/webhooks/rest/webhook"
r = requests.post(Url, json = Dict_to_send)
print(r.text)
b = r.text
if "text" in b:
a = (b.strip('"]').split(":")[2])
message = a.replace('"', "")
self.botausgabe(message)
else:
message = "keine Antwort"
self.botausgabe(message)
def botausgabe(self, message):
#self.ui.textEdit.setTextBackgroundColor(QtGui.QColor(143,188,143))
self.ui.textEdit.setAlignment(QtCore.Qt.AlignRight)
self.ui.textEdit.append(message)
self.ui.textEdit.append("")
def main():
app = QtWidgets.QApplication(sys.argv) if QtWidgets.QApplication.instance() is None else QtWidgets.QApplication.instance()
mainwindow = MainWindow()
mainwindow.show()
sys.exit(app.exec_())
if __name__ == "__main__":
main()
更新： 如果你想用气泡样式包裹所有文本，请将之前的代码替换为这个。
#it may be necessary to call repaint() at an appropriate time.
def paintEvent(self, event):
painter = QtGui.QPainter(self.viewport())
pen = QtGui.QPen(QtGui.QColor(143, 188, 143))
pen.setStyle(QtCore.Qt.SolidLine)
pen.setCapStyle(QtCore.Qt.RoundCap)
brush = QtGui.QBrush(QtGui.QColor(143, 188, 143))
painter.setPen(pen)
painter.setBrush(brush)
painter.setRenderHint(QtGui.QPainter.Antialiasing)
doc = self.document()
margin = doc.documentMargin()
rightAlignmentStart = self.size().width()
natruralTextWidth = 0
unitedBlockRect = QtCore.QRectF()
for b in range(doc.blockCount()):
block = doc.findBlockByNumber(b)
blockRect = doc.documentLayout().blockBoundingRect(block)
layout = block.layout()
lineRect = QtCore.QRectF()
for k in range(layout.lineCount()):
line = layout.lineAt(k)
linerect = line.rect()
naturalTextWidth = max(line.naturalTextWidth(), natruralTextWidth)
if self.alignment() == QtCore.Qt.AlignRight:
rightAlignmentStart = min(rightAlignmentStart, self.size().width() - naturalTextWidth - margin)
lineRect = lineRect.united(linerect)
unitedBlockRect = blockRect.united(lineRect)
unitedBlockRect.setX(rightAlignmentStart - 20)
#I think it is better you keep a extra width.
unitedBlockRect.setWidth(unitedBlockRect.width() )
painter.drawRoundedRect(unitedBlockRect, 10, 10)
return QtWidgets.QTextEdit.paintEvent(self, event)
为用户界面
改变自己。 → 物件。或 self.ui.textEdit
旧
请试试这个代码。
你设法绘制了圆角矩形背景。
但我现在能控制的范围如下：
-
背景颜色被周围的文字所采用。
颜色相同。
如果您更改某些内容，您可能必须每次都考虑编码。
请将代码停靠在您的代码上。
注意：
line.rect() 返回QTextLine 的相对矩形。左上角是 (0, 0)。
如果我们按原样使用这个矩形，我们不能从第二个块中绘制适当的矩形。
所以我也得到了blockBoundingRect 并翻译了lineRect。这个rect包含documentMargin。
# -*- coding: utf-8 -*-
"""
Created on Sat Jan 2 12:26:06 2021
@author: Haru
"""
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
class MyEdit(QtWidgets.QTextEdit):
def __init__(self, parent=None):
super(MyEdit, self).__init__(parent)
font = QtGui.QFont()
font.setFamily("MS Shell Dlg 2")
font.setPointSize(8)
font.setStrikeOut(False)
#You don't use setBackgroundColor()
self.setLineWrapMode(self.LineWrapMode(3))
self.setLineWrapColumnOrWidth(40)
self.setWordWrapMode(1)
self.append("")
self.setFont(font)
self.setPlainText( "Here is the background i want to change. Iwant it to be round instead of a corner.")
self.setAlignment(QtCore.Qt.AlignRight)
def paintEvent(self, event):
painter = QtGui.QPainter(self.viewport())
pen = QtGui.QPen(QtGui.QColor(143, 188, 143))
pen.setStyle(QtCore.Qt.SolidLine)
pen.setCapStyle(QtCore.Qt.RoundCap)
brush = QtGui.QBrush(QtGui.QColor(143, 188, 143))
painter.setPen(pen)
painter.setBrush(brush)
painter.setRenderHint(QtGui.QPainter.Antialiasing)
doc = self.document()
margin = doc.documentMargin()
for b in range(doc.blockCount()):
block = doc.findBlockByNumber(b)
blockRect = doc.documentLayout().blockBoundingRect(block)
layout = block.layout()
for k in range(layout.lineCount()):
line = layout.lineAt(k)
lineRect = line.rect()
lineRect.setWidth(line.naturalTextWidth())
lineRect.translate(blockRect.x(), blockRect.y())
if self.alignment() == QtCore.Qt.AlignRight:
lineRect.setX(self.size().width() - line.naturalTextWidth() - margin)
lineRect.setWidth(line.naturalTextWidth())
painter.drawRoundedRect(lineRect, 2, 2)
return QtWidgets.QTextEdit.paintEvent(self, event)
我的代码结果（在我的环境中）
因为您是由 Qt-designer 制作的小部件，所以您可能无法按原样停靠我的代码。 这是代码。请重写必要的部分。 ThisClassName，等等。
self.ui.textEdit.installEventFilter(self)
def eventFilter(self, obj, event):
if event.type() == QtCore.QEvent.Paint:
if obj is self.ui.textEdit:
painter = QtGui.QPainter(obj.viewport())
pen = QtGui.QPen(QtGui.QColor(143, 188, 143))
pen.setCapStyle(QtCore.Qt.RoundCap)
brush = QtGui.QBrush(QtGui.QColor(143, 188, 143))
painter.setPen(pen)
painter.setBrush(brush)
painter.setRenderHint(QtGui.QPainter.Antialiasing)
doc = obj.document()
margin = doc.documentMargin()
for b in range(doc.blockCount()):
block = doc.findBlockByNumber(b)
blockRect = doc.documentLayout().blockBoundingRect(block)
layout = block.layout()
for k in range(layout.lineCount()):
line = layout.lineAt(k)
lineRect = line.rect()
lineRect.setWidth(line.naturalTextWidth())
lineRect.translate(blockRect.x(), blockRect.y())
if self.alignment() == QtCore.Qt.AlignRight:
lineRect.setX(obj.size().width() - line.naturalTextWidth() - margin)
lineRect.setWidth(line.naturalTextWidth())
painter.drawRoundedRect(lineRect, 2, 2)
return True
return **ThisClassName**.eventFilter(self, obj, event)
【讨论】：
if not painter.isActive() 没用，只需创建以目标对象为参数的painter即可；此外，QBrush 始终默认使用 SolidPattern，并且在绘制事件中无需结束绘制器，因为它会在对象销毁时自动关闭。
您的评论非常棒。好的，我会重新编辑。
不要调用painter.begin(self.viewport())，只创建painter = QPainter(self.viewport())
抱歉，这是不正确的：如果您使用目标设备作为参数创建画家，则不应不调用 begin，因为创建这样的实例会自动开始绘画操作。
如果你没问题，请随意改写我的答案。我相信你。以上是关于无法在 Pyqt5 中更改 qtextedit 的背景边框，有啥建议吗？的主要内容，如果未能解决你的问题，请参考以下文章
PyQt5 控件学习（一个一个学习之QPlainTextEdit）