void CodeEditor::repaintLineNumberArea()
{
//repaint
QRect lineNumberAreaRect(lineNumberArea->x(), lineNumberArea->y(),
lineNumberArea->width(), lineNumberArea->height());
emit updateRequest(lineNumberAreaRect, 0);
}
// returns the width of the line number area
int HighlightingItemDelegate::drawLineNumber(QPainter *painter, const QStyleOptionViewItem &option,
const QRect &rect,
const QModelIndex &index) const
{
static const int lineNumberAreaHorizontalPadding = 4;
const int lineNumber = index.model()->data(index, int(HighlightingItemRole::LineNumber)).toInt();
if (lineNumber < 1)
return 0;
const bool isSelected = option.state & QStyle::State_Selected;
const QString lineText = QString::number(lineNumber);
const int minimumLineNumberDigits = qMax(kMinimumLineNumberDigits, lineText.count());
const int fontWidth =
painter->fontMetrics().horizontalAdvance(QString(minimumLineNumberDigits, '0'));
const int lineNumberAreaWidth = lineNumberAreaHorizontalPadding + fontWidth
+ lineNumberAreaHorizontalPadding;
QRect lineNumberAreaRect(rect);
lineNumberAreaRect.setWidth(lineNumberAreaWidth);
QPalette::ColorGroup cg = QPalette::Normal;
if (!(option.state & QStyle::State_Active))
cg = QPalette::Inactive;
else if (!(option.state & QStyle::State_Enabled))
cg = QPalette::Disabled;
painter->fillRect(lineNumberAreaRect, QBrush(isSelected ?
option.palette.brush(cg, QPalette::Highlight) :
option.palette.color(cg, QPalette::Base).darker(111)));
QStyleOptionViewItem opt = option;
opt.displayAlignment = Qt::AlignRight | Qt::AlignVCenter;
opt.palette.setColor(cg, QPalette::Text, Qt::darkGray);
const QStyle *style = QApplication::style();
const int textMargin = style->pixelMetric(QStyle::PM_FocusFrameHMargin, nullptr, nullptr) + 1;
const QRect rowRect
= lineNumberAreaRect.adjusted(-textMargin, 0,
textMargin - lineNumberAreaHorizontalPadding, 0);
QItemDelegate::drawDisplay(painter, opt, rowRect, lineText);
return lineNumberAreaWidth;
}
void CodeEditor::updateDebugLine(int number)
{
//number > 0 => highlight line
//number == -1 => exit from debug mode
//number == -2 => does not highlight any line, but does not exit from debug mode
//last case for waiting program stops on next instruction or breakpoint
if (number == -1)
setDebugMode(false);
else
setDebugMode(true);
if (number != -2)
currentDebugLine = number;
//create rectangle of line number area and highlight debug line throw updateRequest()
QRect lineNumberAreaRect(lineNumberArea->x(), lineNumberArea->y(),
lineNumberArea->width(), lineNumberArea->height());
emit updateRequest(lineNumberAreaRect, 0);
highlightDebugLine(number);
highlightCurrentLine();
}
