is there any widget or ways to write a widget like this

[xiongxiongchuan]

is there any widget like this ,i want to write a widget like Adobe Firework color picker like this 未命名.JPG

[ChrisW67]

Nothing out-of-the-box is exactly what you want. QColorDialog is the Qt standard colour chooser. Wysota publishes a few colour pickers (http://www.wysota.eu.org/wwwidgets/) but none just like your example.