From 4ae6300717a10c7fa850b800f18a730aee1d3e07 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Fri, 5 Sep 2014 19:57:14 +0200
Subject: Internal code editor. Sound system.

---
 src/codeeditor.cc | 163 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 src/codeeditor.cc

(limited to 'src/codeeditor.cc')

diff --git a/src/codeeditor.cc b/src/codeeditor.cc
new file mode 100644
index 0000000..44b0e9b
--- /dev/null
+++ b/src/codeeditor.cc
@@ -0,0 +1,163 @@
+/****************************************************************************
+ **
+ ** Copyright (C) 2013 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 <QtGui>
+
+#include "codeeditor.h"
+
+
+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()));
+
+	setStyleSheet("font: 12pt \"Courier\";");
+
+	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::runningLine(int lineno)
+{
+	lineNumber = lineno;
+	repaint();
+}
+
+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);
+			if(blockNumber + 1 == lineNumber)	painter.setPen(Qt::green);
+			else 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;
+	}
+}
-- 
cgit v1.2.3