Added basic functionalities of a text editor

1. New File

   • Setting current text to an empty string

     ui->textEdit->setPlainText("");

2. Open File

   • Asking for file name using dialog box

     QFileDialog::getOpenFileName(this,"Open a file");

   • Setting Global File name to selected file

     mFilename = file;
     // Taking all data into a in stream
     QTextStream in(&sFile);
     
     //Reading that data
     QString text = in.readAll();
     sFile.close();
     
     //Setting the read data to text
     ui->textEdit->setPlainText(text);

3. Save

   • Setting out stream of file to save

     QTextStream out(&sFile);
     
     out << ui->textEdit->toPlainText();
     
     sFile.flush();
     sFile.close();

4. Save As

   • Asking for a file name in a dialog box

     QString file = QFileDialog::getSaveFileName(this,"Open a file");

5. Copy

   ui->textEdit->copy();

6. Cut

   ui->textEdit->cut();

7. Paste

   ui->textEdit->paste();

8. Undo

   ui->textEdit->undo();

9. Redo

   ui->textEdit->redo();

10. Bold

    // Saving font weight in a local varaible
    int font = ui->textEdit->fontWeight();
    
    //First check if the font weight is not equal to the weight of BOLD
    if(font != QFont::Bold){
        // Then set the selected text to bold
    
        ui->textEdit->setFontWeight(QFont::Bold);
    }
    // If it is equal
    else{
        // If it is equal then set text to normal {UnBold feature}
        ui->textEdit->setFontWeight(QFont::Normal);
    }
    

11. SubScript and SubScript

    //Added scripting to a local variable
    //And then setting that formatting with the current format
    auto isSubscript = ui->textEdit->currentCharFormat();
    
    // Will check whether the current format is subscript
    if(isSubscript.verticalAlignment() != QTextCharFormat::AlignSubScript){
        // no
        // turn current format to subscript
        QTextCharFormat format;
        format.setVerticalAlignment(QTextCharFormat::AlignSubScript);
        ui->textEdit->setCurrentCharFormat(format);
    }
    else{
        // yes
        // turn current format back to normal
        QTextCharFormat format;
        format.setVerticalAlignment(QTextCharFormat::AlignNormal);
        ui->textEdit->setCurrentCharFormat(format);
    }
    
    //----------------------------------------------------------------
    
    // Similar to subscript
    // Current format will change
    auto isSubscript = ui->textEdit->currentCharFormat();
    
    if(isSubscript.verticalAlignment() != QTextCharFormat::AlignSuperScript){
        QTextCharFormat format;
        format.setVerticalAlignment(QTextCharFormat::AlignSuperScript);
        ui->textEdit->setCurrentCharFormat(format);
    }
    else{
        QTextCharFormat format;
        format.setVerticalAlignment(QTextCharFormat::AlignNormal);
        ui->textEdit->setCurrentCharFormat(format);
    }

Issue 1 : Adding QPdfView library giving error of not finding the library.

Issue 2 : Current format is changed while using Bold, SubScript, SuperScript, Selected text may not change because, setCurrentCharFormat is used rather than mergeCharFormat.

Challenge 1 : Adding my Resume is bit challenging now but still finding a way to do that.