How to indent paragraph in QtextEdit - qt

Question

Everything works in another program, where only textedit, and in the main program - does not work. Apparently the reason is in some kind of Layout. Can you tell me what could be? I am attaching an excerpt from the code.))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
from PyQt5 import QtCore, QtGui, QtWidgets
import os
from PyQt5.QtWidgets import QTextEdit, QApplication
from PyQt5.QtGui import QTextDocument, QTextCursor, QTextBlockFormat
class TextEditor(QTextEdit):
def __init__(self,parent):
super().__init__(parent)
self.initUI()
def initUI(self):
cursor = QTextCursor(self.document())
cursor.select(QTextCursor.Document)
fmt = QTextBlockFormat()
fmt.setTextIndent(60)
cursor.mergeBlockFormat(fmt)
font= QtGui.QFont()
font.setFamily("Times New Roman")
font.setPointSize(14)
self.setFont(font)
self.show()
def insertFromMimeData(self, md):
cursor = self.textCursor()
fmt = QTextBlockFormat()
fmt.setTextIndent(cursor.blockFormat().textIndent())
cursor.mergeBlockFormat(fmt)
cursor.insertText(md.text())
class Ui_mainWindow(object):
def setupUi(self, mainWindow):
mainWindow.setObjectName("mainWindow")
mainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(mainWindow)
self.centralwidget.setObjectName("centralwidget")
self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
self.gridLayout.setObjectName("gridLayout")
self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.textEdit = TextEditor(self.centralwidget)
self.textEdit.setObjectName("textEdit")
self.horizontalLayout_2.addWidget(self.textEdit)
self.gridLayout.addLayout(self.horizontalLayout_2, 2, 0, 1, 1)
self.horizontalLayout = QtWidgets.QHBoxLayout()
self.horizontalLayout.setObjectName("horizontalLayout")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
font = QtGui.QFont()
font.setFamily("Times New Roman")
font.setPointSize(10)
font.setBold(True)
font.setWeight(75)
self.pushButton.setFont(font)
self.pushButton.setObjectName("pushButton")
self.horizontalLayout.addWidget(self.pushButton)
self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
font = QtGui.QFont()
font.setFamily("Times New Roman")
font.setPointSize(10)
font.setBold(True)
font.setWeight(75)
self.pushButton_2.setFont(font)
self.pushButton_2.setObjectName("pushButton_2")
self.horizontalLayout.addWidget(self.pushButton_2)
self.gridLayout.addLayout(self.horizontalLayout, 0, 0, 1, 1)
self.label = QtWidgets.QLabel(self.centralwidget)
font = QtGui.QFont()
font.setPointSize(11)
self.label.setFont(font)
self.label.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
self.label.setObjectName("label")
self.gridLayout.addWidget(self.label, 1, 0, 1, 1)
mainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(mainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
self.menubar.setObjectName("menubar")
mainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(mainWindow)
self.statusbar.setObjectName("statusbar")
mainWindow.setStatusBar(self.statusbar)
self.pig()
self.retranslateUi(mainWindow)
QtCore.QMetaObject.connectSlotsByName(mainWindow)
self.butclick()
self.butclick2()

Answer 1

Use QTextBlockFormat.setTextIndent and QTextCursor.mergeBlockFormat instead of QTextEdit.setStyleSheet:
cursor = QTextCursor(self.textEdit.document())
cursor.select(QTextCursor.Document)
fmt = QTextBlockFormat()
fmt.setTextIndent(60)
cursor.mergeBlockFormat(fmt)
Result:
UPD As #ВалерияГригорьева rightfully pointed out, the indent is discarded when pasting plain text (although I would expect it should be taken from the current block by the default implementation). Therefore we need to override QTextEdit.insertFromMimeData and apply indentation on insert:
cursor = self.textCursor()
fmt = QTextBlockFormat()
fmt.setTextIndent(cursor.blockFormat().textIndent())
cursor.mergeBlockFormat(fmt)
cursor.insertText(md.text())
For pasting the rich text, on the other hand, we don't want to suppress indents because they are a part of the rich text formatting and thus we can rely on the default implementation of QTextEdit.insertFromMimeData.
Complete code sample (for PyQt5):
import sys
from PyQt5.QtWidgets import QTextEdit, QApplication
from PyQt5.QtGui import QTextDocument, QTextCursor, QTextBlockFormat
class TextEditor(QTextEdit):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
# format text edit
self.setPlainText(
"Impedit voluptatem sequi quae quo quos. \n" +
"Asperiores non repellat culpa nihil. \n" +
"Voluptatum ut numquam dolorem molestiae voluptatem " +
"est modi necessitatibus. \n" +
"Hic rerum voluptas voluptatem. \n" +
"Ut expedita unde eum molestias voluptatem aut" +
"dignissimos dolor. \n" +
"Non illo dolore ut doloremque ut.")
cursor = QTextCursor(self.document())
cursor.select(QTextCursor.Document)
fmt = QTextBlockFormat()
fmt.setTextIndent(60)
cursor.mergeBlockFormat(fmt)
# setup UI
self.setGeometry(300, 300, 300, 200)
self.setWindowTitle('Text indent')
self.show()
def insertFromMimeData(self, md):
# leave processing of the rich text as it is
if md.hasFormat("application/x-qrichtext") or md.hasHtml():
super().insertFromMimeData(md)
else:
# force indentation from the current block
# (shouldn't Qt do this by default, huh?)
cursor = self.textCursor()
fmt = QTextBlockFormat()
fmt.setTextIndent(cursor.blockFormat().textIndent())
cursor.mergeBlockFormat(fmt)
cursor.insertText(md.text())
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = TextEditor()
sys.exit(app.exec())