Force Content Update QPlainTextEdit

brlebtag

I am trying to implement a Code editor. And I trying to implement Line Numbers but with the ability to turn on/off line numbers. I took http://qt-project.org/doc/qt-4.8/widgets-codeeditor.html as initial base...

I added a bool lineNumber and wrapped updateLineNumberArea() and lineNumberAreaPaintEvent() with a if(lineNumber) and altered lineNumberAreaWidth() to return 0 if(lineNumber)

So I tried to repaint(), update(), resize()... but i did't update the QPlainTextEdit, it did updated only when i typed enter...

Any idea? I am newbie

raven-worx

[quote author="brlebtag" date="1390397731"]
I added a bool lineNumber and wrapped updateLineNumberArea() and lineNumberAreaPaintEvent() with a if(lineNumber) and altered lineNumberAreaWidth() to return 0 if(lineNumber)[/quote]
sorry, but this is not understandable.
Please just post some code of this method.

brlebtag

sorry...

@
int CodeEditor::lineNumberAreaWidth()
{
int digits = 1;
int max = qMax(1, blockCount());
while (max >= 10) {
max /= 10;
++digits;
}
int space = 10 + fontMetrics().width(QLatin1Char('9')) * digits;

if(!CodeEditor::line_number)
    space = 0;

return space;

}
void CodeEditor::updateLineNumberArea(const QRect &rect, int dy)
{
if(CodeEditor::line_number)
{
if (dy)
lineNumberArea->scroll(0, dy);
else
lineNumberArea->update(0, rect.y(), lineNumberArea->width(), rect.height());

    if (rect.contains(viewport()->rect()))
        updateLineNumberAreaWidth(0);
}

}

void CodeEditor::resizeEvent(QResizeEvent *e)
{
if(CodeEditor::line_number)
{
QPlainTextEdit::resizeEvent(e);

    QRect cr = contentsRect();
    lineNumberArea->setGeometry(QRect(cr.left(), cr.top(), lineNumberAreaWidth(), cr.height()));
}

}

void CodeEditor::lineNumberAreaPaintEvent(QPaintEvent *event)
{
if(CodeEditor::line_number)
{
QPainter painter(lineNumberArea);
painter.fillRect(event->rect(), Qt::lightGray);

    QTextBlock block = firstVisibleBlock();
    int blockNumber = block.blockNumber();
    int top = (int) blockBoundingGeometry(block).translated(contentOffset()).top();
    int bottom = top + (int) blockBoundingRect(block).height();

    while (block.isValid() && top <= event->rect().bottom())
    {
        if (block.isVisible() && bottom >= event->rect().top())
        {
            QString number = QString::number(blockNumber + 1);
            painter.setPen(Qt::black);
            painter.drawText(0, top, lineNumberArea->width(), fontMetrics().height(),
                             Qt::AlignRight, number);
        }

        block = block.next();
        top = bottom;
        bottom = top + (int) blockBoundingRect(block).height();
        ++blockNumber;
    }
}@

I just added a if(CodeEditor::line_number)