How to change background of Text block in QPlainTextEdit

How to change background of Text block in QPlainTextEdit

References

Reference NO 1

http://stackoverflow.com/questions/15195246/how-to-change-background-of-text-block-in-qplaintextedit

Reference NO 2

http://harmattan-dev.nokia.com/docs/library/html/qt4/qplaintextedit.html

Reference NO 3

http://srinikom.github.io/pyside-docs/PySide/QtGui/QPlainTextEdit.html

Reference NO 4

http://ralsina.com.ar/weblog/posts/BB870.html

Reference NO 5

http://www.qtcentre.org/threads/2196-Qt4-QTextEdit-background-color

Reference NO 6

http://www.java2s.com/Questions_And_Answers/Qt/Widget/QPlainTextEdit.htm

Reference NO 7

http://www.qtforum.org/article/17390/qt4-different-backgroundcolors-for-different-lines-in-qtextedit.html

Reference NO 8

http://doc.crossplatform.ru/qt/4.4.3/qplaintextedit.html