Qt之QCheckBox

构造一个复选框QCheckBox，然后使用setTristate()开启三态模式。

QCheckBox *pCheckBox = new QCheckBox(this); m_pLabel = new QLabel(this);

m_pLabel->setText("Click CheckBox..."); pCheckBox->setText(QString::fromLocal8Bit("三态复选框"));

// 开启三态模式 pCheckBox->setTristate();

// 连接信号槽 connect(pCheckBox, SIGNAL(stateChanged(int)), this, SLOT(onStateChanged(int)));

槽函数，判断当前复选框状态，其中包括：选中（Qt::Checked）、半选（Qt::PartiallyChecked）、未选中（Qt::Unchecked）。

void MainWindow::onStateChanged(int state) { if (state == Qt::Checked) // "选中" { m_pLabel->setText("Checked"); } else if(state == Qt::PartiallyChecked) // "半选" { m_pLabel->setText("PartiallyChecked"); } else // 未选中 - Qt::Unchecked { m_pLabel->setText("Unchecked"); } }

QSS复选框样式。 QCheckBox{ spacing: 5px; color: white; } QCheckBox::indicator { width: 17px; height: 17px; } QCheckBox::indicator:enabled:unchecked { image: url(:/Images/checkBox); } QCheckBox::indicator:enabled:unchecked:hover { image: url(:/Images/checkBoxHover); } QCheckBox::indicator:enabled:unchecked:pressed { image: url(:/Images/checkBoxPressed); } QCheckBox::indicator:enabled:checked { image: url(:/Images/checkBoxChecked); } QCheckBox::indicator:enabled:checked:hover { image: url(:/Images/checkBoxCheckedHover); } QCheckBox::indicator:enabled:checked:pressed { image: url(:/Images/checkBoxCheckedPressed); } QCheckBox::indicator:enabled:indeterminate { image: url(:/Images/checkBoxIndeterminate); } QCheckBox::indicator:enabled:indeterminate:hover { image: url(:/Images/checkBoxIndeterminateHover); } QCheckBox::indicator:enabled:indeterminate:pressed { image: url(:/Images/checkBoxIndeterminatePressed); }

连接stateChanged()信号和槽函数，当用户点击复选框时，状态发生改变就会调用槽函数。

根据以上样式可写为： AirFrame QCheckBox#switch_Button::indicator:unchecked { image: url(://resource/area/checkbox/close.png); }

AirFrame QCheckBox#switch_Button::indicator:checked { image: url(://resource/area/checkbox/open.png); }

以上是更改使用的。