--- /dev/null
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+** of its contributors may be used to endorse or promote products derived
+** from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "codeeditor.h"
+
+#include <QPainter>
+#include <QTextBlock>
+
+class LineNumberArea : public QWidget
+{
+public:
+ LineNumberArea(CodeEditor *editor) : QWidget(editor)
+ {
+ codeEditor = editor;
+ }
+
+ QSize sizeHint() const
+ {
+ return QSize(codeEditor->lineNumberAreaWidth(), 0);
+ }
+
+protected:
+ void paintEvent(QPaintEvent *event)
+ {
+ codeEditor->lineNumberAreaPaintEvent(event);
+ }
+
+private:
+ CodeEditor *codeEditor;
+};
+
+CodeEditor::CodeEditor(QWidget *parent) : QPlainTextEdit(parent)
+{
+ lineNumberArea = new LineNumberArea(this);
+
+ connect(this, SIGNAL(blockCountChanged(int)), this, SLOT(updateLineNumberAreaWidth(int)));
+ connect(this, SIGNAL(updateRequest(QRect,int)), this, SLOT(updateLineNumberArea(QRect,int)));
+ connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(highlightCurrentLine()));
+
+ updateLineNumberAreaWidth(0);
+ highlightCurrentLine();
+}
+
+int CodeEditor::lineNumberAreaWidth()
+{
+ int digits = 1;
+ int max = qMax(1, blockCount());
+ while (max >= 10)
+ {
+ max /= 10;
+ ++digits;
+ }
+
+ int space = 3 + fontMetrics().width(QLatin1Char('9')) * digits;
+
+ return space;
+}
+
+void CodeEditor::updateLineNumberAreaWidth(int /* newBlockCount */)
+{
+ setViewportMargins(lineNumberAreaWidth(), 0, 0, 0);
+}
+
+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);
+}
+
+void CodeEditor::resizeEvent(QResizeEvent *e)
+{
+ QPlainTextEdit::resizeEvent(e);
+
+ QRect cr = contentsRect();
+ lineNumberArea->setGeometry(QRect(cr.left(), cr.top(), lineNumberAreaWidth(), cr.height()));
+}
+
+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);
+}
+
+void CodeEditor::lineNumberAreaPaintEvent(QPaintEvent *event)
+{
+ 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;
+ }
+}
--- /dev/null
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+** of its contributors may be used to endorse or promote products derived
+** from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CODEEDITOR_H
+#define CODEEDITOR_H
+
+#include <QPlainTextEdit>
+#include <QObject>
+
+class QPaintEvent;
+class QResizeEvent;
+class QSize;
+class QWidget;
+
+class LineNumberArea;
+
+class CodeEditor : public QPlainTextEdit
+{
+ Q_OBJECT
+
+public:
+ CodeEditor(QWidget *parent = 0);
+
+ void lineNumberAreaPaintEvent(QPaintEvent *event);
+ int lineNumberAreaWidth();
+
+protected:
+ void resizeEvent(QResizeEvent *event);
+
+private slots:
+ void updateLineNumberAreaWidth(int newBlockCount);
+ void highlightCurrentLine();
+ void updateLineNumberArea(const QRect &, int);
+
+private:
+ QWidget *lineNumberArea;
+};
+
+#endif // CODEEDITOR_H
projects / localmylist.git / commitdiff