24.QTableView函数使用,右击菜单实现

QTableView view(this);
QStandardItemModel model(this);

/*设置表头水平标题*/
model.setHorizontalHeaderItem(0,new QStandardItem("Name"));
model.setHorizontalHeaderItem(1,new QStandardItem("Sex"));
model.setHorizontalHeaderItem(2,new QStandardItem("Age"));
model.horizontalHeaderItem(0)->setFont(QFont("Helvetica",20,50));   //设置标题字体

/*设置表头垂直标题*/
model.setVerticalHeaderItem(0,new QStandardItem("No.1"));
model.setVerticalHeaderItem(1,new QStandardItem("No.2"));
model.setVerticalHeaderItem(2,new QStandardItem("No.3"));

/*设置列表条目数据*/
QPixmap  pix(":user.png");
pix = pix.scaled(24,24,Qt::KeepAspectRatio);
QStandardItem *itemA=new QStandardItem();
itemA->setData(pix,Qt::DecorationRole);                        //设置条目图标
itemA->setData("A",Qt::DisplayRole);
itemA->setData("A:tooltip",Qt::ToolTipRole);
itemA->setData(QFont("宋体",12,QFont::Bold,true),Qt::FontRole); //设置条目字体
itemA->setData(Qt::AlignCenter,Qt::TextAlignmentRole);         //设置条目中心对齐

 QLinearGradient linearGradient(0,0,100,20);
 linearGradient.setColorAt(0.2, Qt::white);
 linearGradient.setColorAt(0.6, Qt::green);
 linearGradient.setColorAt(1.0, Qt::black);
 itemA->setData(QBrush(linearGradient),Qt::BackgroundRole);    //设置条目背景色(为渐变色)

   model.setItem(0,0,itemA);
   model.setItem(0,1,new QStandardItem("B"));
   model.setItem(1,0,new QStandardItem("C"));  
   model.item(0,1)->setTextAlignment(Qt::AlignCenter);  //设置条目居中对齐


/*将数据模型的第一列进行下降排序(从大到小,不会进行整行排序)*/
model.sort(0,Qt::DescendingOrder);

#ifndef WIDGET_H
#define WIDGET_H
#include <QtGui>

class Widget : public QWidget
{
    Q_OBJECT

    QTableView  view;
    QStandardItemModel model;
    QMenu   menu;

public:
    explicit Widget(QWidget *parent = 0);
    bool eventFilter(QObject* obj, QEvent *evt);

public slots:
    void onDelete(void);
};

#endif // WIDGET_H

#include "widget.h"

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    view(this),
    model(this),
    menu(this)
{
    model.setItem(0,0, new QStandardItem("A"));
    model.setItem(0,1, new QStandardItem("B"));
    model.setItem(1,0, new QStandardItem("C"));
    model.setItem(1,1, new QStandardItem("D"));
    model.setItem(2,0, new QStandardItem("E"));
    model.setItem(2,1, new QStandardItem("F"));
    model.setItem(3,0, new QStandardItem("G"));
    model.setItem(3,1, new QStandardItem("H"));

    /*设置视图只能选中一行,取消焦点,禁止编辑*/
    view.setFocusPolicy(Qt::NoFocus);
    view.setEditTriggers(QAbstractItemView::NoEditTriggers);
    view.setSelectionMode(QAbstractItemView::SingleSelection);
    view.setSelectionBehavior(QAbstractItemView::SelectRows);
    view.setModel(&model);

    view.installEventFilter(this);         

    menu.addAction("删除",this,SLOT(onDelete()));     //设置菜单项,并连接槽函数
}

void Widget::onDelete(void)
{
    model.removeRow(view.currentIndex().row());   //更据当前鼠标所在的索引的行位置,删除一行
}

bool Widget::eventFilter(QObject* obj, QEvent *evt)
{
    if(obj == &view  &&  evt->type() == QEvent::ContextMenu)
    {
        if(view.currentIndex().isValid()==true)
        {
              menu.exec(cursor().pos());           //在当前鼠标位置上运行菜单menu对象
        }
    }
    return QWidget::eventFilter(obj,evt);
}

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();
    return a.exec();
}