34.QT模型(表格绘制)

• modellex.h

  #ifndef MODELEX_H
  #define MODELEX_H
  #include <QAbstractItemModel>
  #include <QVector>
  #include <QMap>
  #include <QStringList>
  #include <QWidget>
  
  
  class modelex : public QAbstractTableModel
  {
  
  public:
      explicit modelex(QObject *parent = 0);
  
      virtual int rowCount(const QModelIndex &parent=QModelIndex()) const;
      virtual int columnCount(const QModelIndex &parent=QModelIndex()) const;
      QVariant data(const QModelIndex &index, int role) const;
      QVariant headerData(int section, Qt::Orientation orientation, int role) const;
  
  private:
      QVector<int> army;
      QVector<int> weapon;
      QMap<int,QString> armymap;
      QMap<int,QString> weaponmap;
  
      QStringList weaponlist;
      QStringList armylist;
      QStringList header;
  
      void showModel();
  };
  
  #endif // MODELEX_H

• modelex.cpp

  #include "modelex.h"
  
  modelex::modelex(QObject *parent):QAbstractTableModel(parent)
  {
      armymap[1] ="空军";
      armymap[2] ="海军";
      armymap[3] ="陆军";
  
      weaponmap[1] = "AK47";
      weaponmap[2] = "M16";
      weaponmap[3] = "M18";
      showModel();
  }
  
  int modelex::rowCount(const QModelIndex &parent) const
  {
       return army.size();//行数
  }
  
  int modelex::columnCount(const QModelIndex &parent) const
  {
     return 2;//列数
  }
  
  //返回每一行每一列的数据
  QVariant modelex::data(const QModelIndex &index, int role) const
  {
      if(!index.isValid())
      {
          return QVariant();
      }
      if(role == Qt::DisplayRole)
      {
          switch(index.column())
          {
              case 0:
                  return armymap[army[index.row()]];
                  break;
              case 1:
                  return armymap[weapon[index.row()]];
                  break;
              default:
                  return QVariant();
          }
  
      }
      return QVariant();
  }
  
  QVariant modelex::headerData(int section, Qt::Orientation orientation, int role) const
  {
      if(role == Qt::DisplayRole && Qt::Horizontal == orientation)
      {
          //返回表的开头
          return header[section];
      }
      else
      {
          return QAbstractTableModel::headerData(section,orientation,role);
      }
  }
  
  void modelex::showModel()
  {
      header<<"兵种" <<"兵器";
      //数字与字符串对应
      army<<1<<2<<3<<2<<1;
      weapon<<1<<2<<3<<2<<1;
  }

• main.cpp

  #include "widget.h"
  #include <QApplication>
  #include <QTableView>
  #include "modelex.h"
  
  int main(int argc, char *argv[])
  {
      QApplication a(argc, argv);
      //Widget w;
      //w.show();
      modelex m;
      QTableView view;
      view.setModel(&m);
      view.show();
      view.resize(800,600);
  
      return a.exec();
  }

运行效果