SqlTextEdit: Highlight current line

src/PreferencesDialog.cpp

@@ -177,6 +177,8 @@ QVariant PreferencesDialog::getSettingsDefaultValue(const QString& group, const
                 return QColor(Qt::darkMagenta).name();
             else if(name == "string_colour")
                 return QColor(Qt::red).name();
+            else if(name == "currentline_colour")
+                return QColor(236, 236, 245).name();
         }
     }
 

src/PreferencesDialog.ui

@@ -267,6 +267,14 @@
            <string/>
           </property>
          </item>
+         <item>
+          <property name="text">
+           <string>currentline</string>
+          </property>
+          <property name="text">
+           <string>Current line</string>
+          </property>
+         </item>
         </widget>
        </item>
       </layout>

src/sqltextedit.cpp

@@ -1,4 +1,5 @@
 #include "sqltextedit.h"
+#include "PreferencesDialog.h"
 
 #include <QKeyEvent>
 #include <QAbstractItemView>
@@ -16,8 +17,10 @@ SqlTextEdit::SqlTextEdit(QWidget* parent) :
     m_Completer->setWrapAround(false);
     m_Completer->setWidget(this);
 
-    QObject::connect(m_Completer, SIGNAL(activated(QString)),
+    connect(m_Completer, SIGNAL(activated(QString)), this, SLOT(insertCompletion(QString)));
-                     this, SLOT(insertCompletion(QString)));
+    connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(highlightCurrentLine()));
+
+    highlightCurrentLine();
 }
 
 SqlTextEdit::~SqlTextEdit()
@@ -91,6 +94,23 @@ void SqlTextEdit::insertCompletion(const QString& completion)
     setTextCursor(tc);
 }
 
+void SqlTextEdit::highlightCurrentLine()
+{
+    QList<QTextEdit::ExtraSelection> extra_selections;
+
+    QTextEdit::ExtraSelection selection;
+    selection.format.setBackground(QColor(PreferencesDialog::getSettingsValue("syntaxhighlighter", "currentline_colour").toString()));
+    selection.format.setFontWeight(PreferencesDialog::getSettingsValue("syntaxhighlighter", "currentline_bold").toBool() ? QFont::Bold : QFont::Normal);
+    selection.format.setFontItalic(PreferencesDialog::getSettingsValue("syntaxhighlighter", "currentline_italic").toBool());
+    selection.format.setFontUnderline(PreferencesDialog::getSettingsValue("syntaxhighlighter", "currentline_underline").toBool());
+    selection.format.setProperty(QTextFormat::FullWidthSelection, true);
+    selection.cursor = textCursor();
+    selection.cursor.clearSelection();
+    extra_selections.append(selection);
+
+    setExtraSelections(extra_selections);
+}
+
 namespace {
 bool isSqliteIdentifierChar(QChar c) {
     return c.isLetterOrNumber() || c == '.' || c == '_';

src/sqltextedit.h

@@ -37,6 +37,7 @@ private:
 
 private slots:
     void insertCompletion(const QString& completion);
+    void highlightCurrentLine();
 
 private:
     QCompleter* m_Completer;