add of setbold, setItalic, setUnderlined and setFontColor functions

mainwindow.cpp

@@ -6,6 +6,7 @@
 #include <QMessageBox>
 #include <QLineEdit>
 #include <QTimer>
+#include <QTextEdit>
 
 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
@@ -212,3 +213,91 @@ void MainWindow::on_actionEditCut_triggered()
     }
 }
 
+void MainWindow::setBold(){
+    QWidget *focused = QApplication::focusWidget();
+    QTextEdit* textEdit = qobject_cast<QTextEdit*>(focused);
+
+    if (textEdit) {
+        QTextCursor cursor = textEdit->textCursor();
+        if (cursor.hasSelection()) {
+            QTextCharFormat format;
+            QFont font = textEdit->currentFont();
+            font.setBold(!font.bold());
+            format.setFont(font);
+            cursor.mergeCharFormat(format);
+        }
+    }
+}
+
+void MainWindow::on_actionBold_triggered()
+{
+    this->setBold();
+}
+
+
+
+void MainWindow::setItalic(){
+    QWidget *focused = QApplication::focusWidget();
+    QTextEdit* textEdit = qobject_cast<QTextEdit*>(focused);
+
+    if (textEdit) {
+        QTextCursor cursor = textEdit->textCursor();
+        if (cursor.hasSelection()) {
+            QTextCharFormat format;
+            QFont font = textEdit->currentFont();
+            font.setItalic(!font.italic());
+            format.setFont(font);
+            cursor.mergeCharFormat(format);
+        }
+    }
+}
+
+void MainWindow::on_actionItalic_triggered()
+{
+    this->setItalic();
+}
+
+
+void MainWindow::setUnderline(){
+    QWidget *focused = QApplication::focusWidget();
+    QTextEdit* textEdit = qobject_cast<QTextEdit*>(focused);
+
+    if (textEdit) {
+        QTextCursor cursor = textEdit->textCursor();
+        if (cursor.hasSelection()) {
+            QTextCharFormat format;
+            QFont font = textEdit->currentFont();
+            font.setUnderline(!font.underline());
+            format.setFont(font);
+            cursor.mergeCharFormat(format);
+        }
+    }
+}
+
+void MainWindow::on_actionUnderline_triggered()
+{
+    this->setUnderline();
+}
+
+
+
+void MainWindow::setColor(){
+    QWidget *focused = QApplication::focusWidget();
+    QTextEdit* textEdit = qobject_cast<QTextEdit*>(focused);
+
+    if (textEdit) {
+        QTextCursor cursor = textEdit->textCursor();
+        if (cursor.hasSelection()) {
+            QTextCharFormat format;
+            format.setForeground(QBrush(QColor(255,0,0)));
+            cursor.mergeCharFormat(format);
+        }
+    }
+
+}
+
+void MainWindow::on_actionColor_triggered()
+{
+    this->setColor();
+}
+