qt tabwidget切换_标签怎么在新窗口打开

#include "c.h"
c::c(QWidget *parent)
: QMainWindow(parent)
{ 

ui.setupUi(this);
//连接信号与槽.
connect(ui.insertButton, SIGNAL(clicked()), this, SLOT(addPageSlot()));    connect(ui.removeButton, SIGNAL(clicked()), this, SLOT(removePageSlot()));    connect(ui.dragButton, SIGNAL(clicked()), this, SLOT(dragPageSlot()));
}
c::~c()
{ 

}
void c::addPageSlot()
{ 

//定义一个QWidget.
QWidget *temp = new QWidget;
//在当前页面的后面插入一个新的页面.
ui.tabWidget->insertTab(ui.tabWidget->currentIndex() + 1, temp, QIcon("Icons/2.png"), QString::number(count));    //显示新的页面.
ui.tabWidget->setCurrentIndex(ui.tabWidget->indexOf(temp));
count++;
}
void c::removePageSlot()
{ 

//删除当前的页面.
ui.tabWidget->removeTab(ui.tabWidget->currentIndex());}
void c::dragPageSlot()
{ 

//设置页面项是可被移动的.
ui.tabWidget->setMovable(true);}    

#ifndef C_H
#define C_H
#include <QtWidgets/QMainWindow>
#include "ui_c.h"
#include <QTabWidget>
#include <QPushButton>
class c : public QMainWindow
{
Q_OBJECT
public:
c(QWidget *parent = 0);
~c();
private slots:   
void addPageSlot();    
void removePageSlot();    
void dragPageSlot();private:
Ui::cClass ui;   
int count = 0;
};#endif

int addTab(QWidget page, str label)
int addTab(QWidget page, QIcon icon, str label)

page为一个QWidget 实例对象，其名字为对应选项卡的名字
label为选项卡栏显示的选项卡标题文字，文字中可通过与符号（&）带一个快捷键字母，对应快捷键为：Alt+与符号后面字母
icon为选项卡栏显示的选项卡图标
返回值为新加选项卡在选项卡栏中的位置索引

	self.tab_reportManner = QtWidgets.QWidget()
self.tab_reportManner.setObjectName("tab_reportManner")
icon.addPixmap(QtGui.QPixmap(":/IT/图像文件/blog.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
self.tabWidget.addTab(self.tab_reportManner, icon, "疫情上报方式")

int insertTab(int index, QWidget page, str label)
int insertTab(int index, QWidget page, QIcon icon， str label)

insertTab方法的参数除了多了个index参数外，其他参数和返回值都是一样
如果index值超出范围，则新选项卡在所有选项卡最后面
如果在调用此函数之前QTabWidget没有选项卡，则插入选项卡将成为当前页，否则当前页保持不变

#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QTableWidget>
class Widget : public QWidget
{
Q_OBJECT
QTabWidget m_tabWidget;
protected slots:
void onTabCurrentChanged(int index);
void onTabCloseRequested(int index);
public:
Widget(QWidget *parent = 0);
~Widget();
};
#endif // WIDGET_H

#include "Widget.h"
#include <QPlainTextEdit>
#include <QLabel>
#include <QPushButton>
#include <QVBoxLayout>
#include <QDebug>
Widget::Widget(QWidget *parent)
: QWidget(parent)
{ 

//QTabWidget的基本设置
m_tabWidget.setParent(this);
m_tabWidget.move(10, 10);
m_tabWidget.resize(200, 200);
m_tabWidget.setTabPosition(QTabWidget::North);
m_tabWidget.setTabShape(QTabWidget::Triangular);
m_tabWidget.setTabsClosable(false);
QPlainTextEdit* edit = new QPlainTextEdit(&m_tabWidget);
edit->insertPlainText("页面1");
m_tabWidget.addTab(edit, "1st");
QWidget* widget = new QWidget(&m_tabWidget);
QVBoxLayout* layout = new QVBoxLayout();
QLabel* lbl = new QLabel(widget);
QPushButton* btn = new QPushButton(widget);
lbl->setText("页面2");
lbl->setAlignment(Qt::AlignCenter);
btn->setText("页面2");
layout->addWidget(lbl);
layout->addWidget(btn);
widget->setLayout(layout);
m_tabWidget.addTab(widget, "2nd");
m_tabWidget.setCurrentIndex(1);
connect(&m_tabWidget, SIGNAL(currentChanged(int)), this, SLOT(onTabCurrentChanged(int)));
connect(&m_tabWidget, SIGNAL(tabCloseRequested(int)), this, SLOT(onTabCloseRequested(int)));
}
void Widget::onTabCurrentChanged(int index)
{ 

qDebug() << "Page change to: " << index;
}
void Widget::onTabCloseRequested(int index)
{ 

m_tabWidget.removeTab(index);
}
Widget::~Widget()
{ 

}

1 class Tab : public QTabWidget 2 { 

3     Q_OBJECT
4 public:
5     Tab(QWidget *parent = 0);
6     QTabBar* GetBar();
7 protected:
8     void mousePressEvent(QMouseEvent *event);
9 };

 1 #ifndef MYEVENTFILTER_H
2 #define MYEVENTFILTER_H
3 #include <QMainWindow>
4 #include <QMouseEvent>
5 #include "tab.h"
6 
7 extern int tabindex_current;
8 extern int tabindex_old;
9 extern Tab *tabWidget;
10 extern QPoint tableft;
11 extern int tabwidth;
12 extern int tabheight;
13 
14 //实现双击关闭Tab标签
15 class myEventFilter: public QObject 16 { 

17   public:
18   myEventFilter():QObject()
19   { 
};
20   ~myEventFilter(){ 
};
21 
22   bool eventFilter(QObject* object,QEvent* event)
23   { 

24       if (event->type()==QEvent::MouseButtonDblClick)
25       { 

26           QMouseEvent *e = static_cast<QMouseEvent*>(event);
27           QPoint pos = e->pos();
28           int x1 = tableft.x();
29           int x2 = tableft.x()+tabwidth;
30           int y1 = tableft.y();
31           int y2 = tableft.y()+tabheight;
32           if (pos.x() >= x1 && pos.y() >= y1 && pos.x() <= x2 && pos.y() <= y2)
33               tabWidget->removeTab(tabindex_current);
34       }
35       return QObject::eventFilter(object,event);
36   };
37 };
38 
39 #endif // MYEVENTFILTER_H

最后绑定到主函数main中，这样就可捕捉到所有的事件了：
1 qApp->installEventFilter(new myEventFilter());

另外，需在标签页切换时更新宽度信息（高度无需更新）：
1 void MainWindow::updateBar()
2 { 

3     tabindex_current = tabWidget->currentIndex();
4     tabindex_old = tabindex_current;
5     QTabBar *bar = tabWidget->GetBar();
6     if (bar->size().width() > 0)
7          tabwidth = bar->size().width();
8 }

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QTabWidget>
#include <QTextEdit>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{ 

ui->setupUi(this);
connect(ui->tabWidget,SIGNAL(tabCloseRequested(int)),this,SLOT(removeSubTab(int)));
}
MainWindow::~MainWindow()
{ 

delete ui;
}
void MainWindow::removeSubTab(int index)
{ 

ui->tabWidget->removeTab(index);
}
void MainWindow::on_pushButton_clicked()
{ 

QTextEdit *edit=new QTextEdit;
ui->tabWidget->addTab(edit,"hitemp 1");
}