Qt入门－单选框和复选框

    在Qt GUI中，单选框类是QRadioButton，复选框类是QCheckBox。它们都是QAbstractButton的派生类。

（1）单选框

示例：

//设置为选择状态
radioButton->setChecked(true);
//返回选择状态
bool radio_sel = radioButton->isChecked();

 

（2）复选框
 复选框不同于单选框，它有三种状态：checked、unchecked和PartiallyChecked。

Qt::Unchecked	0	The item is unchecked.
Qt::PartiallyChecked	1	The item is partially checked. Items in hierarchical models may be partially checked if some, but not all, of their children are checked.
Qt::Checked	2	The item is checked.

 

常用方法和属性如下：

//返回选择的状态
Qt::CheckState	checkState () const
//是否处于PartiallyChecked状态
bool	isTristate () const
//设置选择的状态，checked或unchecked
void	setCheckState ( Qt::CheckState state )
//设置为PartiallyChecked状态
void	setTristate ( bool y = true )