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Diffstat (limited to 'examples/widgets/widgets/codeeditor/codeeditor.cpp')
-rw-r--r-- | examples/widgets/widgets/codeeditor/codeeditor.cpp | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/examples/widgets/widgets/codeeditor/codeeditor.cpp b/examples/widgets/widgets/codeeditor/codeeditor.cpp deleted file mode 100644 index 15f84622e4..0000000000 --- a/examples/widgets/widgets/codeeditor/codeeditor.cpp +++ /dev/null @@ -1,134 +0,0 @@ -// Copyright (C) 2016 The Qt Company Ltd. -// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause - -#include "codeeditor.h" - -#include <QPainter> -#include <QTextBlock> - -//![constructor] - -CodeEditor::CodeEditor(QWidget *parent) : QPlainTextEdit(parent) -{ - lineNumberArea = new LineNumberArea(this); - - connect(this, &CodeEditor::blockCountChanged, this, &CodeEditor::updateLineNumberAreaWidth); - connect(this, &CodeEditor::updateRequest, this, &CodeEditor::updateLineNumberArea); - connect(this, &CodeEditor::cursorPositionChanged, this, &CodeEditor::highlightCurrentLine); - - updateLineNumberAreaWidth(0); - highlightCurrentLine(); -} - -//![constructor] - -//![extraAreaWidth] - -int CodeEditor::lineNumberAreaWidth() -{ - int digits = 1; - int max = qMax(1, blockCount()); - while (max >= 10) { - max /= 10; - ++digits; - } - - int space = 3 + fontMetrics().horizontalAdvance(QLatin1Char('9')) * digits; - - return space; -} - -//![extraAreaWidth] - -//![slotUpdateExtraAreaWidth] - -void CodeEditor::updateLineNumberAreaWidth(int /* newBlockCount */) -{ - setViewportMargins(lineNumberAreaWidth(), 0, 0, 0); -} - -//![slotUpdateExtraAreaWidth] - -//![slotUpdateRequest] - -void CodeEditor::updateLineNumberArea(const QRect &rect, int dy) -{ - if (dy) - lineNumberArea->scroll(0, dy); - else - lineNumberArea->update(0, rect.y(), lineNumberArea->width(), rect.height()); - - if (rect.contains(viewport()->rect())) - updateLineNumberAreaWidth(0); -} - -//![slotUpdateRequest] - -//![resizeEvent] - -void CodeEditor::resizeEvent(QResizeEvent *e) -{ - QPlainTextEdit::resizeEvent(e); - - QRect cr = contentsRect(); - lineNumberArea->setGeometry(QRect(cr.left(), cr.top(), lineNumberAreaWidth(), cr.height())); -} - -//![resizeEvent] - -//![cursorPositionChanged] - -void CodeEditor::highlightCurrentLine() -{ - QList<QTextEdit::ExtraSelection> extraSelections; - - if (!isReadOnly()) { - QTextEdit::ExtraSelection selection; - - QColor lineColor = QColor(Qt::yellow).lighter(160); - - selection.format.setBackground(lineColor); - selection.format.setProperty(QTextFormat::FullWidthSelection, true); - selection.cursor = textCursor(); - selection.cursor.clearSelection(); - extraSelections.append(selection); - } - - setExtraSelections(extraSelections); -} - -//![cursorPositionChanged] - -//![extraAreaPaintEvent_0] - -void CodeEditor::lineNumberAreaPaintEvent(QPaintEvent *event) -{ - QPainter painter(lineNumberArea); - painter.fillRect(event->rect(), Qt::lightGray); - -//![extraAreaPaintEvent_0] - -//![extraAreaPaintEvent_1] - QTextBlock block = firstVisibleBlock(); - int blockNumber = block.blockNumber(); - int top = qRound(blockBoundingGeometry(block).translated(contentOffset()).top()); - int bottom = top + qRound(blockBoundingRect(block).height()); -//![extraAreaPaintEvent_1] - -//![extraAreaPaintEvent_2] - 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 + qRound(blockBoundingRect(block).height()); - ++blockNumber; - } -} -//![extraAreaPaintEvent_2] - |