通過自定義代理風格：

class iconned_dock_style: public QProxyStyle{

Q_OBJECT

QIcon icon_;

public:

iconned_dock_style(const QIcon& icon, QStyle* style = 0)

: QProxyStyle(style)

, icon_(icon)

{}

virtual ~iconned_dock_style()

{}

virtual void drawControl(ControlElement element, const QStyleOption* option,

QPainter* painter, const QWidget* widget = 0) const

{

if(element == QStyle::CE_DockWidgetTitle)

{

//width of the icon

int width = pixelMetric(QStyle::PM_ToolBarIconSize);

//margin of title from frame

int margin = baseStyle()->pixelMetric(QStyle::PM_DockWidgetTitleMargin);

QPoint icon_point(margin + option->rect.left(), margin + option->rect.center().y() - width/2);

painter->drawPixmap(icon_point, icon_.pixmap(width, width));

const_cast(option)->rect = option->rect.adjusted(width, 0, 0, 0);

}

baseStyle()->drawControl(element, option, painter, widget);

}

};

例：

QDockWidget* w("my title", paretn);

w->setStyle(new iconned_dock_style( QIcon(":/icons/icons/utilities-terminal.png"), w->style()));

總結

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