PyQt6 Not toggling "bold" text.

[Ovid]

On Fri, Jan 26, 2024 at 12:15 PM Florian Bruhin <me at the-compiler.org> wrote:

> I know almost nothing about QTextEditor, so take this with a grain of
> salt. If this isn't it, a self-contained runnable example to play around
> with would really help: http://www.sscce.org/
>
> > if self.textEditor.currentCharFormat().fontWeight() != QFont.Weight.Bold:
>
> The docs for QTextEditor::currentCharFormat() say:
>
>     Returns the char format that is used when inserting new text.
>
> So the behaviour you describe makes sense to me - if I change some
> selected text to be bold, I don't want all newly typed text to be bold
> too.
>
> It sounds to me like you might be looking for something like
> self.textEditor.textCursor().charFormat() instead, i.e. check if the
> text in front of the cursor is bold?
>
> For what it's worth, the quickcontrols texteditor example in Qt does
> something similar, though it looks like it uses a different way of
> checking for bold-ness:
>
>
> https://code.qt.io/cgit/qt/qtdeclarative.git/tree/examples/quickcontrols/texteditor/documenthandler.cpp?h=6.6#n279
>
>
Hi Florian,

Thanks for the response. Still not sure how to get the behavior I'm looking
for, but I took your advice and created a sscce that displays the behavior.
You can type in some text and either click the "B" button on the toolbar or
hit "ctrl-b". Some debugging output is emitted to the console.

import sys
from PyQt6.QtWidgets import (
    QTextEdit,
    QToolButton,
    QApplication,
    QMainWindow,
    QToolBar,
)
from PyQt6.QtGui import (
    QFont,
    QShortcut,
    QKeySequence,
    QTextCharFormat
)

class OvidFont:
    def __init__(self, ovid) -> None:
        self.textEditor = ovid.textEditor

     # This should be able to toggle the bold text selected, but it doesn't
seem
     # to do so
    def setBoldText(self):
        fmt = QTextCharFormat()
        print(f"charFormat: {self.textEditor.textCursor().charFormat()}")
        weight = self.textEditor.currentCharFormat().fontWeight()
        print(f"weight: {weight} QFont.Weight.Bold: {QFont.Weight.Bold}")
        if self.textEditor.currentCharFormat().fontWeight() ==
QFont.Weight.Bold:
            print("    setting normal")
            fmt.setFontWeight(QFont.Weight.Normal)
        else:
            print("    setting bold")
            fmt.setFontWeight(QFont.Weight.Bold)
        self.textEditor.textCursor().setCharFormat(fmt)

class Ovid(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle("Ovid")
        self.setGeometry(100, 100, 1200, 800)
        # Create the text editor area
        self.textEditor = QTextEdit()
        self.setCentralWidget(self.textEditor)
        self.fonts = OvidFont(self)

        # Create Toolbar
        self.toolbar = QToolBar("Main Toolbar")
        self.addToolBar(self.toolbar)

        # Add actions for text formatting
        bold_button = QToolButton()
        bold_button.setText("B")
        bold_button.setFont(QFont("Arial", 16, QFont.Weight.Bold))
        bold_button.setToolTip("Bold")
        bold_button.clicked.connect(self.fonts.setBoldText)
        self.toolbar.addWidget(bold_button)

        # Shortcuts for text formatting
        QShortcut(QKeySequence("Ctrl+B"), self, self.fonts.setBoldText)

def main():
    app = QApplication(sys.argv)
    ex = Ovid()
    ex.show()
    sys.exit(app.exec())


if __name__ == "__main__":
    main()
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