QTabWidget+QToolBar实现浏览器标签页

直接上代码

/********************************************************************
* author 周翔
* e-mail [email protected]
* blog http://blog.csdn.net/zhx6044
**********************************************************************/

#ifndef TABWORKSPACE_H
#define TABWORKSPACE_H

#include <QTabWidget>
#include <QTabBar>
#include <QToolBar>
#include <QAction>
#include <QMenu>
#include <QToolButton>




class TabWorkSpace : public QTabWidget
{
    Q_OBJECT
public:
    explicit TabWorkSpace(QWidget *parent = 0);
    
signals:
    
public slots:

protected:
    void resizeEvent(QResizeEvent *e);


private slots:
    void slt_newTab();

    void slt_closeTab(int index);

    void slt_showTab(QAction *a);
private:

    enum RESETFLAG{NEW, CLOSE, NORMAL, SPECIAL};

    QToolBar *tab_control;
    QAction *new_tab;
    QAction *list_tabs;
    QWidget *padding_widget;


    void initTabControl();
    /**
     * @brief resetTabBar 重置TabBar
     */
    void resetTabBar(RESETFLAG flag);


    void setListTabs();




    
};

#endif // TABWORKSPACE_H

/********************************************************************
* author 周翔
* e-mail [email protected]
* blog http://blog.csdn.net/zhx6044
**********************************************************************/

#include "tabworkspace.h"
#include <QDebug>

TabWorkSpace::TabWorkSpace(QWidget *parent) :
    QTabWidget(parent)
{
    this->addTab(new QWidget,"utitle");
    this->addTab(new QWidget,"utitle");
    this->setUsesScrollButtons(true);
    this->setTabsClosable(true);
    this->setMovable(true);
    initTabControl();
    this->setCornerWidget(tab_control);
    resetTabBar(NORMAL);

    connect(this,SIGNAL(tabCloseRequested(int)),this,SLOT(slt_closeTab(int)));
}

void TabWorkSpace::resizeEvent(QResizeEvent *e)
{
    resetTabBar(NORMAL);
    QTabWidget::resizeEvent(e);

}

void TabWorkSpace::resetTabBar(RESETFLAG flag)
{
    QSize size = this->size();
    int tabsWidth = 0;
    int tabsHeight = tabBar()->height();
    int tabs = count();
    if (flag == NEW || flag == NORMAL) {
        for (int i = 0;i < tabs;++i) {
            tabsWidth += tabBar()->tabRect(i).width();
        }
    } else {
        for (int i = 0;i < tabs - 1;++i) {
            tabsWidth += tabBar()->tabRect(i).width();
        }
    }

    if (size.width() > tabsWidth) {
        //
        if (flag == SPECIAL) {
            padding_widget->setMinimumWidth(size.width() - tabsWidth - 40);

        } else {
            padding_widget->setMinimumWidth(size.width() - tabsWidth - 35);
        }
        list_tabs->setVisible(false);
    } else {
        //
        list_tabs->setVisible(true);
        setListTabs();
        qDebug() << "?";
        padding_widget->setMinimumWidth(0);

    }
    padding_widget->setMinimumHeight(tabsHeight);
}

void TabWorkSpace::initTabControl()
{
    tab_control = new QToolBar();
    QList<QAction*> actions;
    new_tab = new QAction("+",tab_control);
    list_tabs = new QAction("V",tab_control);
    list_tabs->setVisible(false);
    actions << new_tab << list_tabs;
    tab_control->addActions(actions);
    padding_widget = new QWidget();
    tab_control->addWidget(padding_widget);
    tab_control->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Expanding);

    connect(new_tab,SIGNAL(triggered()),this,SLOT(slt_newTab()));
}

void TabWorkSpace::slt_newTab()
{
    this->addTab(new QWidget,"utitle");
    if (!tabsClosable()) {
        setTabsClosable(true);
    }
    resetTabBar(NEW);
}

void TabWorkSpace::slt_closeTab(int index)
{
    widget(index)->deleteLater();
    resetTabBar(CLOSE);
    if (count() == 2) {
        setTabsClosable(false);
        resetTabBar(SPECIAL);
    }



}

void TabWorkSpace::setListTabs()
{
    QMenu *list = new QMenu();
    int c = count();
    for (int i = 0;i < c;++i) {
        QAction *action = new QAction(tabText(i),list);
        action->setProperty("index", i);
        list->addAction(action);
    }
    QMenu *old = list_tabs->menu();
    delete old;
    list_tabs->setMenu(list);
    connect(list,SIGNAL(triggered(QAction*)),this,SLOT(slt_showTab(QAction*)));



}

void TabWorkSpace::slt_showTab(QAction *a)
{
   // QAction *_sender = static_cast<QAction*> (sender());
    int index = a->property("index").toInt();
    setCurrentIndex(index);
}


/********************************************************************
* author 周翔
* e-mail [email protected]
* blog http://blog.csdn.net/zhx6044
**********************************************************************/

#include <QApplication>

#include "tabworkspace.h"


int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    TabWorkSpace tws;
    tws.resize(640,380);
    tws.show();
    
    return a.exec();
}

现在还遇到一个问题，就是点击list_tabs动作事，点击好多下菜单才出现，不知道什么原因，还希望谁给点指示。