lesson6-表

一、表
1、QTableWidget
    QTableWidget是Qt中最常见的显示数据表格的控件，它是QTableView的子类。它必须使用标准的数据模型，每一个单元格必须QTableWidgetItem对象实现。
2、常用方法
1）、构造函数，创建指定行和列的表
QTableWidget ( int rows, int columns, QWidget * parent = 0 )
 
2）、普通函数
void setHorizontalHeaderItem ( int column, QTableWidgetItem * item )
void setHorizontalHeaderLabels ( const QStringList & labels )
void setVerticalHeaderItem ( int row, QTableWidgetItem * item )
void setVerticalHeaderLabels ( const QStringList & labels )

setItem ( int row, int column, QTableWidgetItem * item )
void setCellWidget ( int row, int column, QWidget * widget )
int rowCount () 
int columnCount () 

3）、槽函数
void insertColumn ( int column )
void insertRow ( int row )
void removeColumn ( int column )
void removeRow ( int row )

4）、信号
void cellChanged ( int row, int column )
void cellClicked ( int row, int column )
void cellDoubleClicked ( int row, int column )

void itemChanged ( QTableWidgetItem * item )
void itemClicked ( QTableWidgetItem * item )
void itemDoubleClicked ( QTableWidgetItem * item )

二、单元格
1、QTableWidgetItem
QTableWidget表格的建立必须依靠单元格，整个表格都是由单元格建立起来的
2、常用方法
1）、构造函数，创建指定行和列的表
QTableWidgetItem ( const QString & text, int type = Type )
QTableWidgetItem ( const QIcon & icon, const QString & text, int type = Type )
 
2）、普通函数
void setBackground ( const QBrush & brush )
void setText ( const QString & text )
int textAlignment () const
void setIcon ( const QIcon & icon )

三、实例
1、头文件

#ifndef TABLEWIDGET_H
#define TABLEWIDGET_H
#include <QtGui>

class tableWidget : public QDialog
{
Q_OBJECT
public:
    tableWidget();
private:
    QPushButton *addRowBtn, *addColBtn, *removeRowBtn, *removeColBtn;
    QTableWidget *table;

public slots:
    void addRow();
    void addCol();
    void removeRow();
    void removeCol();
};

#endif

2、cpp

#include "tableWidget.h"

tableWidget::tableWidget()
{
    //控件初始化
    addRowBtn = new QPushButton("增加行");
    addColBtn = new QPushButton("增加列");
    removeRowBtn = new QPushButton("删除行");
    removeColBtn = new QPushButton("删除列");
    table = new QTableWidget(2,3);
    //布局
    QVBoxLayout *vLay = new QVBoxLayout();
    vLay->addWidget(addRowBtn);
    vLay->addWidget(addColBtn);
    vLay->addWidget(removeRowBtn);
    vLay->addWidget(removeColBtn);
    QHBoxLayout *hLay = new QHBoxLayout();
    hLay->addWidget(table);
    hLay->addLayout(vLay);
    setLayout(hLay);
    //绑定信号和槽函数
    connect(addRowBtn, SIGNAL(clicked()), this, SLOT(addRow()));
    connect(addColBtn, SIGNAL(clicked()), this, SLOT(addCol()));
    connect(removeRowBtn, SIGNAL(clicked()), this, SLOT(removeRow()));
    connect(removeColBtn, SIGNAL(clicked()), this, SLOT(removeCol()));
    //设置表头
    QStringList head;
    head<<"姓名"<<"年龄"<<"性别";
    table->setHorizontalHeaderLabels(head);
    //设置单元格
    table->setItem(0, 0, new QTableWidgetItem("魏杰"));
    table->setItem(0, 1, new QTableWidgetItem("30"));
    QComboBox *com1 = new QComboBox();
    QComboBox *com2 = new QComboBox();
    QStringList sex;
    sex<<"男"<<"女";
    com1->addItems(sex);
    com2->addItems(sex);
    table->setCellWidget(0, 2, com1);
    table->setCellWidget(1, 2, com2);

    resize(800, 800);
    setWindowTitle("hehe");

}

void tableWidget::addRow()
{
    int num = table->rowCount();
    table->insertRow(num);
}
void tableWidget::addCol()
{
    int num = table->columnCount();
    table->insertColumn(num);
}
void tableWidget::removeRow()
{
    int num = table->rowCount();
    table->removeRow(num-1);
}
void tableWidget::removeCol()
{
    int num = table->columnCount();
    table->removeColumn(num-1);

}