C++ GUI Programming with Qt 4

5. Creating Custom Widgets

• Customizing Qt Widgets
• Subclassing QWidget
• Integrating Custom Widgets with Qt Designer
• Double Buffering

This chapter explains how to develop custom widgets using Qt. Custom widgets can be created by subclassing an existing Qt widget or by subclassing QWidget directly. We will demonstrate both approaches, and we will also see how to integrate a custom widget with Qt Designer so that it can be used just like a built-in Qt widget. We will round off the chapter by presenting a custom widget that uses double buffering, a powerful technique for high-speed drawing.

Customizing Qt Widgets

In some cases, we find that a Qt widget ...