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Copy pathtexteditor.cpp
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170 lines (127 loc) · 4.16 KB
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#include <QtGui>
#include <iostream>
#include "texteditor.h"
#include "highlighter.h"
TextEditor::TextEditor(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();
QFont font("consolas",9);
const int tabStop = 4; // 4 characters
QFontMetrics metrics(font);
setTabStopWidth(tabStop * metrics.width(' '));
setFont(font);
setLineWrapMode(QPlainTextEdit::NoWrap);
m_highlighter = new Highlighter(document());
m_autoUpdate = false;
m_timer = new QTimer();
m_timer->setSingleShot(true);
m_timer->setInterval(1000);
connect(m_timer, SIGNAL(timeout()), this, SLOT(updateShader()));
connect(this, SIGNAL(textChanged()), this, SLOT(resetTimer()));
}
void TextEditor::open(QString filename, int id)
{
if(id < 0)
m_highlighter->defineXMLRule();
m_id = id;
m_filename = filename;
QFile f(m_filename);
f.open(QIODevice::ReadOnly | QIODevice::Text);
QTextStream flux(&f);
setPlainText( flux.readAll() );
f.close();
m_autoUpdate = false;
}
void TextEditor::save()
{
QFile f(m_filename);
f.setPermissions(QFile::WriteUser);
f.open(QIODevice::WriteOnly | QIODevice::Text);
QTextStream flux(&f);
flux.setCodec("UTF-8");
flux << toPlainText();
f.close();
}
int TextEditor::lineNumberAreaWidth()
{
int digits = 1;
int max = qMax(1, blockCount());
while (max >= 10) {
max /= 10;
++digits;
}
int space = 5 + fontMetrics().width(QLatin1Char('9')) * digits;
return space;
}
void TextEditor::updateLineNumberAreaWidth(int /* newBlockCount */)
{
setViewportMargins(lineNumberAreaWidth(), 0, 0, 0);
}
void TextEditor::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 TextEditor::resizeEvent(QResizeEvent *e)
{
QPlainTextEdit::resizeEvent(e);
QRect cr = contentsRect();
lineNumberArea->setGeometry(QRect(cr.left(), cr.top(), lineNumberAreaWidth(), cr.height()));
}
void TextEditor::highlightCurrentLine()
{
QList<QTextEdit::ExtraSelection> extraSelections;
if (!isReadOnly()) {
QTextEdit::ExtraSelection selection;
QColor lineColor = QColor(Qt::darkGray).darker(300);
selection.format.setBackground(lineColor);
selection.format.setProperty(QTextFormat::FullWidthSelection, true);
selection.cursor = textCursor();
selection.cursor.clearSelection();
extraSelections.append(selection);
}
setExtraSelections(extraSelections);
}
void TextEditor::lineNumberAreaPaintEvent(QPaintEvent *event)
{
QPainter painter(lineNumberArea);
// painter.fillRect(event->rect(), Qt::black);
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::darkGray);
painter.drawText(0, top, lineNumberArea->width(), fontMetrics().height(),
Qt::AlignRight, number);
}
block = block.next();
top = bottom;
bottom = top + (int) blockBoundingRect(block).height();
++blockNumber;
}
}
void TextEditor::resetTimer()
{
m_timer->start();
m_autoUpdate = true;
}
void TextEditor::updateShader()
{
if( m_autoUpdate )
{
emit shaderUpdate( this->toPlainText(), m_id);
m_autoUpdate = false;
}
}