Added line numbers to textview - replaced textBrowser with plainTextEdit

Author: Mich

src/QtSerialMonitor.pro

@@ -30,6 +30,7 @@ DEFINES += QT_DEPRECATED_WARNINGS
 CONFIG += c++11
 
 SOURCES += \
+        codeeditor.cpp \
         filereader.cpp \
         infodialog.cpp \
         logger.cpp \
@@ -42,6 +43,7 @@ SOURCES += \
 
 HEADERS += \
         ../../../../../../Downloads/QCustomPlot.tar/qcustomplot/qcustomplot.h \
+        codeeditor.h \
         config.h \
         filereader.h \
         infodialog.h \

src/codeeditor.cpp

@@ -0,0 +1,100 @@
+#include <QtWidgets>
+#include "codeeditor.h"
+
+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();
+}
+
+int CodeEditor::lineNumberAreaWidth()
+{
+    int digits = 1;
+    int max = qMax(1, blockCount());
+
+    while (max >= 10)
+    {
+        max /= 10;
+        ++digits;
+    }
+
+    int space = 3 + fontMetrics().horizontalAdvance("  ") * 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::AlignLeft, number);
+        }
+
+        block = block.next();
+        top = bottom;
+        bottom = top + (int)blockBoundingRect(block).height();
+        ++blockNumber;
+    }
+}

src/codeeditor.h

@@ -0,0 +1,60 @@
+#ifndef CODEEDITOR_H
+#define CODEEDITOR_H
+
+#include <QPlainTextEdit>
+
+QT_BEGIN_NAMESPACE
+class QPaintEvent;
+class QResizeEvent;
+class QSize;
+class QWidget;
+QT_END_NAMESPACE
+
+class LineNumberArea;
+
+class CodeEditor : public QPlainTextEdit
+{
+    Q_OBJECT
+
+public:
+    CodeEditor(QWidget *parent = nullptr);
+
+    void lineNumberAreaPaintEvent(QPaintEvent *event);
+    int lineNumberAreaWidth();
+
+protected:
+    void resizeEvent(QResizeEvent *event) override;
+
+private slots:
+    void updateLineNumberAreaWidth(int newBlockCount);
+    void highlightCurrentLine();
+    void updateLineNumberArea(const QRect &, int);
+
+private:
+    QWidget *lineNumberArea;
+};
+
+class LineNumberArea : public QWidget
+{
+public:
+    LineNumberArea(CodeEditor *editor) : QWidget(editor)
+    {
+        codeEditor = editor;
+    }
+
+    QSize sizeHint() const override
+    {
+        return QSize(codeEditor->lineNumberAreaWidth(), 0);
+    }
+
+protected:
+    void paintEvent(QPaintEvent *event) override
+    {
+        codeEditor->lineNumberAreaPaintEvent(event);
+    }
+
+private:
+    CodeEditor *codeEditor;
+};
+
+#endif

src/config.h

@@ -1,7 +1,7 @@
 #ifndef CONFIG_H
 #define CONFIG_H
 
-#define VERSION "1.2"
+#define VERSION "1.3"
 
 #define CHANGELOG_TEXT "" //"Changelog - version " VERSION ": \n"
 

src/mainwindow.cpp

@@ -484,8 +484,8 @@ void MainWindow::processTable(QStringList labels, QList<double> values)
 void MainWindow::on_printIntroChangelog() // TODO
 {
     ui->pushButtonTextLogToggle->setChecked(false);
-    ui->textBrowserLogs->append(INTRO_TEXT);
-    ui->textBrowserLogs->append("\n" CHANGELOG_TEXT);
+    ui->textBrowserLogs->appendPlainText(INTRO_TEXT);
+    ui->textBrowserLogs->appendPlainText("\n" CHANGELOG_TEXT);
 
     //    ui->textBrowserLogs->horizontalScrollBar()->setValue(0);
 }
@@ -839,7 +839,7 @@ void MainWindow::addLog(QString text)
         if (ui->checkBoxShowTime->isChecked())
             text = currentDateTime + text;
 
-        ui->textBrowserLogs->append(text);
+        ui->textBrowserLogs->appendPlainText(text);
 
         // ui->textBrowserLogs->insertPlainText(text);
         // ui->textBrowserLogs->moveCursor(QTextCursor::MoveOperation::End, QTextCursor::MoveMode::MoveAnchor);
@@ -869,7 +869,7 @@ void MainWindow::addLogBytes(QString prefix, QByteArray bytes, bool hexToBinary)
         if (ui->checkBoxShowTime->isChecked())
             bytesText = currentDateTime + bytesText;
 
-        ui->textBrowserLogs->append(bytesText);
+        ui->textBrowserLogs->appendPlainText(bytesText);
     }
 }
 
@@ -1330,9 +1330,9 @@ void MainWindow::on_highlighLog(QString searchString)
 void MainWindow::on_checkBoxWrapText_toggled(bool checked)
 {
     if (checked)
-        ui->textBrowserLogs->setLineWrapMode(QTextBrowser::LineWrapMode::WidgetWidth);
+        ui->textBrowserLogs->setLineWrapMode(QPlainTextEdit::LineWrapMode::WidgetWidth);
     else
-        ui->textBrowserLogs->setLineWrapMode(QTextBrowser::LineWrapMode::NoWrap);
+        ui->textBrowserLogs->setLineWrapMode(QPlainTextEdit::LineWrapMode::NoWrap);
 }
 
 void MainWindow::on_checkBoxEnableTracer_toggled(bool checked)
@@ -2172,3 +2172,11 @@ void MainWindow::closeEvent(QCloseEvent *event)
             event->accept();
     }
 }
+
+void MainWindow::on_comboBoxFormat_currentIndexChanged(int index)
+{
+    if (index == 0)
+        ui->comboBoxTextProcessing->setEnabled(true);
+    else
+        ui->comboBoxTextProcessing->setEnabled(false);
+}

src/mainwindow.h

@@ -85,6 +85,7 @@ private slots:
     void on_checkBoxWrapText_toggled(bool checked);
     void on_clearGraphSelection();
     void on_comboBoxClockSource_currentIndexChanged(int index);
+    void on_comboBoxFormat_currentIndexChanged(int index);
     void on_comboBoxGraphDisplayMode_currentIndexChanged(const QString &arg1);
     void on_comboBoxLoggingMode_currentIndexChanged(int index);
     void on_comboBoxSendReturnPressedSlot();