[{"_1":2,"_64":-5,"_65":-5},"loaderData",{"_3":4,"_33":34,"_62":-5,"_63":-5},"root",{"_5":-5,"_6":-5,"_7":8,"_20":-5,"_21":22,"_23":24,"_27":28},"user","shoppingCartId","shoppingCart",{"_9":10,"_11":12,"_13":14,"_15":16,"_17":18,"_19":12},"count",0,"free",true,"updatedAt","2025-12-13T11:44:26.217Z","paymentGateway","STRIPE","cartItems",[],"loading","toast","locale","en","constants",{"_25":26},"paypalClientId","AenrHU49peF-ZUH-Yq7AXLLNZYGUGlml474U16NCjB4ZznmQCEjiliN3whyuVZmkb7VxEzmTALgtKEKE","publishers",{"_29":30,"_31":32},"companies",[],"universities",[],"routes/_store+/_readers+/email_author.$slug/route",{"_35":36,"_61":-5},"book",{"_37":38,"_39":40,"_41":42,"_43":44,"_45":46,"_47":48},"id","Z2lkOi8vbGVhbnB1Yi9TdG9yZTo6Qm9va1Byb2R1Y3QvMTExMjg","title","Qt 4 for Beginners","state","published","contactAuthorMethod","email","aboutText","

Throughout this book is an Image Down Sizer program that is more completed than a Hello World example. It is, of course, an image processing application. You will learn how to make such a program from scratch. As a mentor for beginners, I will divide the implementation into many paragraphs and steps with a lot of description and explanations.

Qt 4 Not Die

It is already the Qt 5 era. Why such a Qt 4 book is still worth for reading? I think there are two reasons:

Must maintain old Qt 4 projects
Not yet upgrade to Qt 5 Enterprise License

As a result, Qt 4 does not die, it just fade away.

At Meet Qt in Taipei Seminar, held on 12 March 2014, the speaker Xia Chunmeng from Digia Beijing asked the audience and found out that:

Only one-third of the 70 people start using QML
Half of the 70 people are still working on Qt 4

I am certainly working hard to revise my book to migrate it to the successor edition Qt 5 for Beginners. I will offer my readers a coupon code to buy the new book at a discount so it is still time to buy the book now.

Buy Now

Welcome to buy this book! If you like this book, you can repeatly buy it or overpay for it to support me.

Group Discount

For groups of over than 3 members that are willing to organize a study group to learn Qt, I offer a coupon code at a discount. Please feel free to find my email address in the About the Author of the sample chapters.

Student Discount

For students who are willing to learn Qt, I offer a coupon code at a discount. Please feel free to find my email address in the About the Author of the sample chapters.

Reader Services

Welcome to join the reader's discussion group Qt for Beginners on Facebook
Welcome to feedback, thanks! Please feel free to fill the online form\n

","authors",[49],{"_37":50,"_51":52,"_5":53},"Z2lkOi8vbGVhbnB1Yi9TdG9yZTo6UHJvZHVjdEF1dGhvci8xMTYyOQ","name","jarsing",{"_54":55},"avatar",{"_56":57,"_58":59,"_60":12},"url","https://d308did4coypzi.cloudfront.net/avatars/208232/medium/Headshot_20131208_512x512.png?1425584916","styleName","medium","exists","currentUser","routes/_store+/_layout","routes/_store+/_readers+/_layout","actionData","errors"]

Email the Author