简单的qt tabbar

signals : void currentChange(int);

public function :  int addTab(const char*);

　　　　　　　　 void setTabText(int, const char*);

tabwidget.h

/*
 * Filename:  tabwidget.h
 * Created:  2011年06月14日 14时03分27秒
 * Author:  Eesher (E) 
 */


#ifndef TABWIDGET_H
#define TABWIDGET_H


#include <QtGui>
#include <QObject>

class TabWidget : public QWidget
{
    Q_OBJECT

public:
    TabWidget(QWidget* parent = 0);

    int addTab(const char*);
    void setTabText(int, const char*);

private:
    QColor m_fontColor;
    QColor m_barColor;
    QColor m_tabColor;
    int m_index;
    QSize m_tabsize;
    QList<const char*> m_tabs;


signals:
    void currentChange(int);

protected:
    void paintEvent(QPaintEvent*);
    void mousePressEvent(QMouseEvent*);

};

#endif

tabwidget.cpp

/*
 * Filename:  tabwidget.cpp
 * Created:  2011年06月14日 14时02分17秒
 * Author:  Eesher (E) 
 */

#include "tabwidget.h"



TabWidget::TabWidget(QWidget* parent) 
    : QWidget(parent)
{
    setMinimumHeight(40);
    m_fontColor = QColor(69, 78, 85);
    m_barColor = QColor(166, 186, 201);
    m_tabColor = QColor(216, 227, 235);
    m_index = 0;
    m_tabsize = QSize(60, 40);
    m_tabs.append("tab1");
    m_tabs.append("tab2");

}


void TabWidget::paintEvent(QPaintEvent*)
{
    QPainter painter(this);
//    QRect bar_rect = rect();
    painter.setBrush(Qt::NoBrush);


    QRect bar_rect(0, 5, m_tabsize.width()*m_tabs.count(), m_tabsize.height());
    painter.setPen(QPen(QBrush(m_barColor), 0.01));
    painter.setBrush(QBrush(m_barColor));
    painter.drawRect(bar_rect);

    QRect active_rect(QPoint(m_tabsize.width()*m_index, 0), m_tabsize);
    painter.setPen(QPen(QBrush(m_tabColor), 0.01));
    painter.setBrush(QBrush(m_tabColor));
    painter.drawRect(active_rect);

    QTextCodec* codec = QTextCodec::codecForName("UTF-8");

    QRect button_rect(QPoint(0, 0), m_tabsize);
    painter.setPen(QPen(QBrush(m_fontColor), 0));
    painter.setFont(font());
    for(int i = 0; i < m_tabs.count(); i++)
        painter.drawText(m_tabsize.width()*i, 0, button_rect.width(), button_rect.height(), Qt::AlignCenter, codec->toUnicode(m_tabs.at(i)));




}

void TabWidget::mousePressEvent(QMouseEvent* e)
{
    int x = e->x();
    int i = x/m_tabsize.width();
    if(i > m_tabs.count()-1)
        return;
    m_index = i;
    emit currentChange(m_index);
    update();
}

int TabWidget::addTab(const char* text)
{
    m_tabs << text;
    return m_tabs.count()-1;
}

void TabWidget::setTabText(int index, const char* text)
{
    m_tabs.replace(index, text);
}