我一直在網絡上尋找很多如何在QtextEdit中制作換行選項，但是我沒有成功。我可以看到我在答案中尋找的內容 移動光標線位置 QText編輯但是當我想做同樣的事情時，我沒有得到相同的結果，我找不到解釋，這是我的代碼import sys from PyQt5.QtWidgets import QMainWindow, QApplication,QLineEdit,QPushButton,QTextEditfrom PyQt5.QtGui import QTextCharFormat, QBrush, QColor, QTextCursorfrom PyQt5.QtCore import QRegExpclass VentanaFindText(QMainWindow): def __init__(self): super(VentanaFindText, self).__init__() self.setWindowTitle("find text - QTextEdit") self.resize(475,253) self.line_buscar = QLineEdit(self) self.line_buscar.setGeometry(20,20,365,23) self.btn_buscar = QPushButton("buscar",self) self.btn_buscar.setGeometry(388,20,75,25) self.text_edit = QTextEdit(self) self.text_edit.setGeometry(20, 50, 441, 191) self.btn_buscar.clicked.connect(self.gotoLine) def gotoLine(self): print("go to line") n = int(self.line_buscar.text()) cursor = QTextCursor(self.text_edit.document().findBlockByLineNumber(n)) self.text_edit.setTextCursor(cursor) if __name__ == '__main__': app = QApplication(sys.argv) ventana = VentanaFindText() ventana.show() sys.exit(app.exec_())
1 回答
SMILET
TA貢獻1796條經驗 獲得超4個贊
問題是，如果行號小于文本中的行數，則返回一個有效的行號，并且在開始時 QTextEdit 為空，因此它將失敗。一種可能的解決方案是添加結束行“\n”，直到獲得行數。findBlockByLineNumber()QTextBlock
import sys
from PyQt5.QtWidgets import (
QMainWindow,
QApplication,
QLineEdit,
QPushButton,
QTextEdit,
QGridLayout,
QWidget,
)
from PyQt5.QtGui import QTextCursor
class VentanaFindText(QMainWindow):
def __init__(self):
super(VentanaFindText, self).__init__()
self.setWindowTitle("find text - QTextEdit")
self.resize(475, 253)
self.line_buscar = QLineEdit()
self.btn_buscar = QPushButton("buscar",)
self.text_edit = QTextEdit()
central_widget = QWidget()
self.setCentralWidget(central_widget)
grid_layout = QGridLayout(central_widget)
grid_layout.addWidget(self.line_buscar, 0, 0)
grid_layout.addWidget(self.btn_buscar, 0, 1)
grid_layout.addWidget(self.text_edit, 1, 0, 1, 2)
self.btn_buscar.clicked.connect(self.gotoLine)
def gotoLine(self):
text = self.line_buscar.text()
try:
n = int(text)
except ValueError:
print("Cannot convert '{}' to integer number".format(text))
else:
if n < 1:
print("The number must be greater than 1")
return
doc = self.text_edit.document()
self.text_edit.setFocus()
if n > doc.blockCount():
self.text_edit.insertPlainText("\n" * (n - doc.blockCount()))
cursor = QTextCursor(doc.findBlockByLineNumber(n - 1))
self.text_edit.setTextCursor(cursor)
if __name__ == "__main__":
app = QApplication(sys.argv)
ventana = VentanaFindText()
ventana.show()
sys.exit(app.exec_())
添加回答
舉報
0/150
提交
取消