移动光标行位置 QTextEdit [英] Move Cursor Line Position QTextEdit

问题描述

• 文本编辑器:Sublime Text 3
• Python 版本:3.6
• UTF-8
• PyQt5

我正在 PyQt5 中制作记事本，我正在制作一个选项以便能够在行之间导航，当然，我需要移动文本编辑器光标，使其位于用户想要的行中，并且问题是，鼻子如何移动TextEdit的光标.我使用了几种方法，但没有一种有效.简单或不移动光标或错误跳转.

I am making a notepad in PyQt5 and I am making an option to be able to navigate between the lines and, of course, I need to move the text editor cursor so that it is in the line that the user wants, and the problem is that, nose how to move the cursor of a TextEdit. I have used several methods and none works. Simply or does not move the cursor or an error jumps.

这是完整的代码:https://github.com/MasPot4/Bloc-de-注意

这是错误的一部分

import sys
from PyQt5 import QtGui
from PyQt5.QtGui import QTextCursor
from PyQt5.QtCore import QUrl
from PyQt5.QtWidgets import QMainWindow, QApplication, QTextEdit, QMessageBox, QLabel, QPushButton
from PyQt5.QtWidgets import QHBoxLayout, QWidget, QMenu, QAction, QFileDialog, QLineEdit
import tkinter

root = tkinter.Tk()
width = root.winfo_screenwidth()
height = root.winfo_screenheight()

class textEdit(QTextEdit):
    def __init__(self):
        super(textEdit, self).__init__()

        self.cursor = self.textCursor()

class gotolineWin(QMainWindow):
    def __init__(self):
        super(gotolineWin, self).__init__()
        self.main = textEdit()
        self.label = QLabel(self)
        self.go_line = QLineEdit(self)
        self.buttonGoto = QPushButton("Go to...", self)
        self.buttonCancel = QPushButton("Cancel", self)

        self.initUi()

    def initUi(self):
        self.label.setText("Go to...")
        self.label.move(20, 0)

        self.go_line.move(20, 25)
        self.go_line.resize(260, 20)

        self.buttonGoto.move(20, 60)
        self.buttonGoto.resize(100, 30)
        self.buttonGoto.clicked.connect(lambda: self.GoToLine(int(self.go_line.text())))

        self.buttonCancel.clicked.connect(self.cancel)
        self.buttonCancel.move(180, 60)

        self.setGeometry((width / 2) - 150, (height / 2) - 50, 300, 100)
        self.setWindowTitle("Go to...")

    def GoToLine(self, line):
        # self.main.cursor = self.main.textCursor()
        # self.main.cursor.movePosition(self.main.cursor.Left, self.main.cursor.KeepAnchor, 3)
        # self.main.setTextCursor(self.main.cursor)

        ln = int(line)
        linecursor = QTextCursor(self.main.document().findBlockByLineNumber(ln - 1))
        self.main.moveCursor(QTextCursor.End, QTextCursor.MoveAnchor)
        self.main.setTextCursor(linecursor)

        self.close()

    def cancel(self):
        self.close()

class writter(QMainWindow):
    def __init__(self):
        super().__init__()

        self.textEdit = textEdit()
        self.lineWin = gotolineWin()
        self.setCentralWidget(self.textEdit)

        self.file_name = None

        self.initUi()

    def initUi(self):
        menubar = self.menuBar()
        fileMenu = menubar.addMenu('File')
        editMenu = menubar.addMenu('Edit')
        formatMenu = menubar.addMenu('Format')
        viewMenu = menubar.addMenu("View")

        # File Menu     
        new_file = QAction('New', self)
        new_file.setShortcut("Ctrl+N")
        new_file.triggered.connect(self.newfile)

        open_file = QAction('Open...', self)
        open_file.setShortcut("Ctrl+O")
        open_file.triggered.connect(self.openfile)

        save_file = QAction('Save', self)
        save_file.setShortcut("Ctrl+S")
        save_file.triggered.connect(self.savefile)

        save_as_file = QAction('Save As...', self)
        save_as_file.setShortcut("Ctrl+Shift+S")
        save_as_file.triggered.connect(self.saveasfile)

        exit = QAction("Exit", self)
        exit.triggered.connect(self.quit)

        # Edit Menu
        undo_edit = QAction("Undo", self)
        undo_edit.setShortcut("Ctrl+Z")
        undo_edit.triggered.connect(self.undo)

        cut_edit = QAction("Cut", self)
        cut_edit.setShortcut("Ctrl+X")
        cut_edit.triggered.connect(self.cut)

        copy_edit = QAction("Copy", self)
        copy_edit.setShortcut("Ctrl+C")
        copy_edit.triggered.connect(self.copy)

        paste_edit = QAction("Paste", self)
        paste_edit.setShortcut("Ctrl+V")
        paste_edit.triggered.connect(self.paste)

        delete_edit = QAction("Delete", self)
        delete_edit.setShortcut("Supr")
        delete_edit.triggered.connect(self.delete)

        goto_edit = QAction("Go To...", self)
        goto_edit.setShortcut("Ctrl+T")
        goto_edit.triggered.connect(self.gotoline)

        find_editor = QAction("Find", self)
        find_editor.setShortcut("Ctrl+F")

        select_all_edit = QAction("Select All", self)
        select_all_edit.setShortcut("Ctrl+E")

        time_edit = QAction("Date and Time", self)
        time_edit.setShortcut("F5")

        # Format Menu
        font_format = QAction("Font", self)

        # View Menu
        zoom_view = QMenu("Zoom", self)
        zoom_mas_view = QAction("Zoom In", self)
        zoom_mas_view.setShortcut("Ctrl++")
        zoom_menos_view = QAction("Ward Off", self)
        zoom_menos_view.setShortcut("Ctrl+-")
        zoom_pre_view = QAction("Restore Default Zoom", self)
        zoom_pre_view.setShortcut("Ctrl+0")
        zoom_view.addAction(zoom_mas_view)
        zoom_view.addAction(zoom_menos_view)
        zoom_view.addAction(zoom_pre_view)

        statusbar_view = QAction("Status Bar", self)

        fileMenu.addAction(new_file)
        fileMenu.addAction(open_file)
        fileMenu.addAction(save_file)
        fileMenu.addAction(save_as_file)
        fileMenu.addSeparator()
        fileMenu.addAction(exit)

        editMenu.addAction(undo_edit)
        editMenu.addSeparator()
        editMenu.addAction(cut_edit)
        editMenu.addAction(copy_edit)
        editMenu.addAction(paste_edit)
        editMenu.addAction(delete_edit)
        editMenu.addSeparator()
        editMenu.addAction(goto_edit)
        editMenu.addAction(find_editor)
        editMenu.addSeparator()
        editMenu.addAction(select_all_edit)
        editMenu.addAction(time_edit)

        viewMenu.addMenu(zoom_view)
        viewMenu.addAction(statusbar_view)

        self.setGeometry((width / 2) - 300, (height / 2) - 250, 600, 500)
        self.setWindowTitle("NotePad 2.0")
        self.show()

    def newfile(self):
        if self.textEdit.toPlainText() != "":
            buttonReply = QMessageBox.question(self, 'Bloc de Notas 2.0', f"You want to save changes to Sin Titulo?", QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
            if buttonReply == QMessageBox.Yes:
                self.saveasfile()
            else:
                try:
                    name, _ = QFileDialog.getSaveFileName(self, "New File", "New File.txt", "All Files (*.*)")
                    url = QUrl.fromLocalFile(name)
                    name = url.fileName()
                    with open(name, "w") as f:
                        f.write("")
                    self.textEdit.clear()
                    self.file_name = name
                except FileNotFoundError:
                    pass
        else:
            try:
                name, _ = QFileDialog.getSaveFileName(self, "New File", "New File.txt", "All Files (*.*)")
                url = QUrl.fromLocalFile(name)
                name = url.fileName()
                with open(name, "w") as f:
                    f.write("")
                self.textEdit.clear()
                self.file_name = name
            except FileNotFoundError:
                pass

    def openfile(self):
        if self.textEdit.toPlainText() != "":
            buttonReply = QMessageBox.question(self, 'Bloc de Notas 2.0', f"You want to save changes to Sin Titulo?", QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
            if buttonReply == QMessageBox.Yes:
                self.saveasfile()               
            else:
                try:
                    name, _ = QFileDialog.getOpenFileName(self, "New File", "New File.txt", "All Files (*.*)")
                    url = QUrl.fromLocalFile(name)
                    name = url.fileName()
                    with open(name, "r") as f:
                        content = f.read()
                    self.textEdit.setText(content)
                except FileNotFoundError:
                    pass
        else:
            try:
                name, _ = QFileDialog.getOpenFileName(self, "New File", "New File.txt", "All Files (*.*)")
                url = QUrl.fromLocalFile(name)
                name = url.fileName()
                with open(name, "r") as f:
                    content = f.read()
                self.textEdit.setText(content)
            except FileNotFoundError:
                pass

    def savefile(self):
        if self.textEdit.toPlainText() == "":
            self.newfile()
        elif self.textEdit.toPlainText() != "":
            if self.file_name == None:
                self.saveasfile()
            else:
                with open(self.file_name, "w") as f:
                    f.write(self.textEdit.toPlainText())
        elif self.file_name == None:
            self.saveasfile()

    def saveasfile(self):
        try:
            name, _ = QFileDialog.getSaveFileName(self,'Save File', "New File.txt", "All Files (*.*)")
            with open(name, "w") as f:
                f.write(self.textEdit.toPlainText())
            self.file_name = name
        except FileNotFoundError:
            pass

    def quit(self):
        sys.exit()

    def undo(self):
        self.textEdit.undo()

    def cut(self):
        self.textEdit.copy()
        self.textEdit.insertPlainText("")

    def copy(self):
        self.textEdit.copy()

    def paste(self):
        text = QApplication.clipboard().text()
        self.textEdit.insertPlainText(text)

    def delete(self):
        self.textEdit.insertPlainText("")

    def gotoline(self):
        self.lineWin.show()

app = QApplication(sys.argv)
Window = writter()
sys.exit(app.exec_())

推荐答案

您正在 gotolineWin 小部件中创建另一个 QTextEdit，这是不必要的，而且您正在移动 QTextEdit 的光标，而不是 QMainWindow 中显示的 QTextEdit.考虑到这一点，我创建了一个 QDialog，它应该只接收添加您想要的功能的 QTextEdit.

You are creating another QTextEdit within the gotolineWin widget and that is unnecessary, plus you are moving the cursor of the QTextEdit that is not the QTextEdit shown in the QMainWindow. Considering this, I have created a QDialog that should only receive the QTextEdit that adds the functionality you want.

import sys
from PyQt5 import QtCore, QtGui, QtWidgets


class GoToDialog(QtWidgets.QDialog):
    gotoSignal = QtCore.pyqtSignal(int)

    def __init__(self, text_edit, parent=None):
        super().__init__(parent)

        self.m_text_edit = text_edit

        self.spinbox = QtWidgets.QSpinBox(minimum=1)
        self.m_text_edit.document().blockCountChanged.connect(self.spinbox.setMaximum)
        self.spinbox.setMaximum(self.m_text_edit.document().blockCount())

        self.buttonGoto = QtWidgets.QPushButton("Go to...")
        self.buttonGoto.clicked.connect(self.onAccepted)
        self.buttonCancel = QtWidgets.QPushButton("Cancel")
        self.buttonCancel.clicked.connect(self.reject)

        vlay = QtWidgets.QVBoxLayout(self)
        hlay = QtWidgets.QHBoxLayout()
        hlay.addWidget(self.buttonGoto)
        hlay.addWidget(self.buttonCancel)
        vlay.addWidget(QtWidgets.QLabel("Go to..."))
        vlay.addWidget(self.spinbox)
        vlay.addLayout(hlay)
        self.setFixedSize(300, 100)

    def onAccepted(self):
        n = self.spinbox.value() - 1
        if 0 <= n < self.m_text_edit.document().blockCount():
            cursor = QtGui.QTextCursor(
                self.m_text_edit.document().findBlockByLineNumber(n)
            )
            self.m_text_edit.setTextCursor(cursor)
        self.reject()


class Writter(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)

        self.text_edit = QtWidgets.QTextEdit()
        self.setCentralWidget(self.text_edit)

        self.goto_dialog = GoToDialog(self.text_edit, self)

        menubar = self.menuBar()
        editMenu = menubar.addMenu("Edit")

        goto_edit = QtWidgets.QAction("Go To...", self)
        goto_edit.setShortcut("Ctrl+T")
        goto_edit.triggered.connect(self.goto_dialog.show)
        editMenu.addAction(goto_edit)

        self.resize(600, 500)
        self.center()

    def center(self):
        self.setGeometry(
            QtWidgets.QStyle.alignedRect(
                QtCore.Qt.LeftToRight,
                QtCore.Qt.AlignCenter,
                self.size(),
                QtWidgets.qApp.desktop().availableGeometry(),
            )
        )


def main():
    app = QtWidgets.QApplication(sys.argv)
    w = Writter()
    w.show()
    return app.exec_()


if __name__ == "__main__":
    sys.exit(main())

这篇关于移动光标行位置 QTextEdit的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！