QTabWidget 竖向 QTabBar横向

参考文件引用自http://blog.csdn.net/skyztttt/article/details/52448992

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/***********************customTabStyle.h*******************************/

#ifndef CUSTOMTABSTYLE_H

#define CUSTOMTABSTYLE_H

#include <QPainter>

#include <QProxyStyle>

#include <QStyleOptionTab>

#include <QRect>

#include <QSize>

class CustomTabStyle : public QProxyStyle

{

public:

    QSize sizeFromContents(ContentsType type, const QStyleOption *option,

        const QSize &size, const QWidget *widget) const

    {

        QSize s = QProxyStyle::sizeFromContents(type, option, size, widget);

        if (type == QStyle::CT_TabBarTab) {

            s.transpose();

            s.rwidth() = 150; // 设置每个tabBar中item的大小

            s.rheight() = 50;

        }

        return s;

    }

    void drawControl(ControlElement element, const QStyleOption *option, QPainter *painter, const QWidget *widget) const

    {

        if (element == CE_TabBarTabLabel) {

            if (const QStyleOptionTab *tab = qstyleoption_cast<const QStyleOptionTab *>(option)) {

                QRect allRect = tab->rect;

                allRect.setWidth(allRect.width() - 5);

                allRect.setHeight(allRect.height() - 2);

                //选中状态

                if (tab->state & QStyle::State_Selected) {

                    //save用以保护坐标，restore用来退出状态

                    painter->save();

                    painter->setBrush(QBrush(0x004ea1));

                    //矩形

                    //painter->drawRect(allRect.adjusted(0, 0, 0, 0));

                    //带有弧线矩形

                    painter->drawRoundedRect(tab->rect, 8, 8);

                    painter->restore();

                }

                //hover状态

                else if(tab->state & QStyle::State_MouseOver){

                    painter->save();

                    painter->setBrush(QBrush(0x004ea1));

                    painter->drawRoundedRect(allRect, 8, 8);

                    painter->restore();

                }

                else{

                    painter->save();

                    painter->setBrush(QBrush(0x78aadc));

                    painter->drawRoundedRect(allRect, 8, 8);

                    painter->restore();

                }

                QTextOption option;

                option.setAlignment(Qt::AlignCenter);

                painter->setFont(QFont("楷体", 18, QFont::Bold));

                painter->setPen(0xffffff);

                painter->drawText(allRect, tab->text, option);

                return;

            }

        }

        if (element == CE_TabBarTab) {

            QProxyStyle::drawControl(element, option, painter, widget);

        }

    }

};

#endif // CUSTOMTABSTYLE_H

/**************************************引用方法***************************************/

    QTabWidget* tab = new QTabWidget();
    QPushButton* closeButton = new QPushButton;
    closeButton->setObjectName("closeButton");
    QPushButton* button = new QPushButton("button");
    tab->addTab(closeButton, "关闭");
    tab->addTab(button, "按钮");
    tab->setTabPosition(QTabWidget::West);
    tab->tabBar()->setStyle(new CustomTabStyle);//注意
    setCentralWidget(tab);