Qtablewidget control of QT

QTableWidget yes QT Table component classes in . It is generally used to display data with multiple rows and columns , yes QT One of the controls used more in .

1、QTableWidgetItem object

QTableWidget Every cell in is a QTableWidgetItem object , So let's introduce it first QTableWidgetItem The common method of .

1.1、 Set text content

void QTableWidgetItem::setText(const QString &text)

1.2、 Set alignment

void QTableWidgetItem::setTextAlignment(int alignment)

1.3、 Set cell background color

void QTableWidgetItem::setBackground(const QBrush &brush)

1.4、 Set the cell display icon

void QTableWidgetItem::setIcon(const QIcon &icon)

1.5、 Set cell font

void QTableWidgetItem::setFont(const QFont &font)

1.6、 Get cell text content

QString QTableWidgetItem::text() const

2、 Set up QTableWidget The header

    // Set number of columns 
    ui->tableWidget->setColumnCount(3);

    QTableWidgetItem *item0 = new QTableWidgetItem;
    QTableWidgetItem *item1 = new QTableWidgetItem;
    QTableWidgetItem *item2 = new QTableWidgetItem;

    // Set display content 
    item0->setText(" full name ");
    item1->setText(" Age ");
    item2->setText(" Student number ");

    // Set the horizontal header 
    ui->tableWidget->setHorizontalHeaderItem(0, item0);
    ui->tableWidget->setHorizontalHeaderItem(1, item1);
    ui->tableWidget->setHorizontalHeaderItem(2, item2);

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 3、 Initialization data

    // Initialization data 
    // When adding data , Be sure to set the number of rows , Otherwise, the data will not be displayed 
    ui->tableWidget->setRowCount(2);

    QTableWidgetItem* name0 = new QTableWidgetItem;
    QTableWidgetItem* name1 = new QTableWidgetItem;
    QTableWidgetItem* age0 = new QTableWidgetItem;
    QTableWidgetItem* age1 = new QTableWidgetItem;
    QTableWidgetItem* code0 = new QTableWidgetItem;
    QTableWidgetItem* code1 = new QTableWidgetItem;

    name0->setText(" Zhang San ");
    name1->setText(" Li Si ");

    age0->setText("28");
    age1->setText("26");

    code0->setText("1000");
    code1->setText("1001");

    // Set... For a specified row or column item
    ui->tableWidget->setItem(0, 0, name0);
    ui->tableWidget->setItem(1, 0, name1);

    ui->tableWidget->setItem(0, 1, age0);
    ui->tableWidget->setItem(1, 1, age1);

    ui->tableWidget->setItem(0, 2, code0);
    ui->tableWidget->setItem(1, 2, code1);

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 4、 insert data

    // Insert data at the end 
    int curRow = ui->tableWidget->rowCount();
    ui->tableWidget->insertRow(curRow);


    QTableWidgetItem* name2 = new QTableWidgetItem;
    QTableWidgetItem* age2 = new QTableWidgetItem;
    QTableWidgetItem* code2 = new QTableWidgetItem;

    name2->setText(" Wang Wu ");
    age2->setText("19");
    code2->setText("1002");


    ui->tableWidget->setItem(curRow, 0, name2);
    ui->tableWidget->setItem(curRow, 1, age2);
    ui->tableWidget->setItem(curRow, 2, code2);

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 5、 Traversal data

    // Traversal data 
    QTableWidgetItem* item;
    QString str;

    for(int i = 0; i < ui->tableWidget->rowCount(); i++){
        for(int j = 0; j < ui->tableWidget->columnCount(); j++){
            item = ui->tableWidget->item(i, j);
            str = str + item->text() + " ";
        }
    }

    qDebug()<<"str = "<<str;

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 6、 Common signals

When cells switch , Send two signals

//currentRow, currentColumn    The currently clicked cell 
//previousRow, previousColumn   Cells that previously had focus 
void QTableWidget::currentCellChanged(int currentRow, int currentColumn, int previousRow, int previousColumn)

//current  The currently clicked cell 
//previous  Cells that previously had focus 
void QTableWidget::currentItemChanged(QTableWidgetItem *current, QTableWidgetItem *previous)

7、 Delete the selected line

    int curRow = ui->tableWidget->currentRow();
    ui->tableWidget->removeRow(curRow);

8、 Setting of header

8.1、 Set the last cell of each row without spaces

    ui->tableWidget->horizontalHeader()->setStretchLastSection(true);

Look directly at the effect

8.2、 Set adaptive size

ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);

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8.3、 Set equal width

ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);

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9、 Other common settings

9.1、 Gets the number of rows and columns

int QTableWidget::rowCount() const

int QTableWidget::columnCount() const

9.2、 Get the row number and column number of the current cell

int QTableWidget::currentRow() const

int QTableWidget::currentColumn() const

9.3、 Set whether the cell content can be edited

void setEditTriggers(EditTriggers triggers)
 

9.4、 Set whether the selection method is cell selection or row selection

void setSelectionBehavior(QAbstractItemView::SelectionBehavior behavior)

QAbstractItemView::SelectItems      // Cell selection mode

QAbstractItemView::SelectRows      // Row selection mode

QAbstractItemView::SelectColumns // Column selection mode

Qt The use of the manual

The above description is QTableWidget Some commonly used methods , Using these methods for basic data display and reading is completely enough , If you want to use some other functions , You can check it by yourself qt manual .

install qt after , We enter Assistant, Then open the .

  Here we enter the name of the control we want to query , All the methods provided by this control will be queried on the right .