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QPageBar is a Qt widget based on Qt 5/Qt 6, which can be used to implement the page switching function (similar to various forum page bars, where you can switch pages by clicking on the page number or entering the page number).

Simply import the qpagebar.h and qpagebar.cpp files in the src folder into the project to use. (The Chinese folder contains comments in Chinese, while the English folder contains comments in English.)

There are two ways to declare the QPageBar class:

The first method has only one parent parameter:

QPageBar(QWidget* parent = nullptr);

• This constructor has only one parent parameter, so you can directly declare QPageBar in the .ui file, and Qt's ui compiler will automatically call this constructor.
• This function declares a PageBar with a page count of zero, and you need to call the setCount method to set the page count.

The second method has three parameters:

QPageBar(int pageTotalCount, int pageShowCount = 5, QWidget* parent = nullptr);

• This function declares a PageBar with a total page count of pageTotalCount and a display page button count of pageShowCount.

There are four ways to switch pages:

• Click on the previous page button (<).
• Click on the next page button (>).
• Click on the page number button.
• Enter the page number and click OK.

All four ways will activate the pageChanged signal, and the signal parameter int page is the page number to jump to. You only need to connect the pageChanged signal with the jump logic.

There is a test program in the demo folder, which can be built using qmake. Simply open QPageBarDemo.pro with Qt Creator and compile and run it.