QT基础(八) 三态按钮设计
三态按钮（普通态，鼠标停留态，点击态）在设计炫丽界时是很常用的一项功能，但QT并没有直接支持这个功能，只好自己写一个了，通过继承QToolButton实现。
上代码：
[cpp] view plain copy print?
#include
class CoolButton : public QToolButton
{
Q_OBJECT
private:
QIcon m_NormalIcon;
QIcon m_FocusIcon;
QIcon m_PressedIcon;
protected:
void enterEvent(QEvent *event);
void leaveEvent(QEvent *event);
void mousePressEvent(QMouseEvent *event);
void mouseReleaseEvent(QMouseEvent *event);
public:
CoolButton(QWidget *parent = 0);
virtual ~CoolButton();
void SetButtonIcons(const QIcon &normal,
const QIcon &focus = QIcon(),
const QIcon &pressed = QIcon() );
};
CoolButton::CoolButton(QWidget *parent)
: QToolButton(parent)
{
//为了让图标看起来自然一点而设置了这两个操作
setDown(false);
setFocusPolicy(Qt::NoFocus);
}
CoolButton::~CoolButton()
{
}
//重载“进入”和“离开”事件，进入时切换为另一个图标，离开时还原
void CoolButton::enterEvent(QEvent *event)
{
if( isEnabled() && !m_FocusIcon.isNull() )
setIcon(m_FocusIcon);
}
void CoolButton::leaveEvent(QEvent *event)
{
if( isEnabled() )
setIcon(m_NormalIcon);
}
//重载鼠标事件
void CoolButton::mousePressEvent(QMouseEvent *event)
{
if( isEnabled() && !m_PressedIcon.isNull() )
setIcon(m_PressedIcon);
QToolButton::mousePressEvent(event);
}
void CoolButton::mouseReleaseEvent(QMouseEvent *event)
{
if( isEnabled() && m_FocusIcon.isNull() )
setIcon(m_FocusIcon);
QToolButton::mouseReleaseEvent(event);
}
void CoolButton::SetButtonIcons(const QIcon &normal,
const QIcon &focus, const QIcon &pressed)
{
m_NormalIcon = normal;
m_FocusIcon = focus;
m_PressedIcon = pressed;
setIcon(m_NormalIcon);
}
#include "main.moc"
int main(int argc, char **argv)
{
QApplication app(argc, argv);
CoolButton *button = new CoolButton;
//QObject::connect(button, SIGNAL(clicked()), qApp, SLOT(quit()));
button->setIconSize(QSize(40, 40));
button->SetButtonIcons(QIcon("normal.png"), QIcon("focus.png"), QIcon("pressed.png"));
button->show();
return app.exec();
}
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