Is it possible for JTextPane to have columns and r

问题:

I have JTextPane from Netbeans designer's section. I want to add columns and rows on it. However, there is no option for adding columns or row in the property window of JTextPane. Is there another way to do this?

回答1:

JTextPane supports formatted documents. One format it supports is HTML. Therefore, it is possible to use an HTML table to provide tabular data - data in columns and rows.

---

Also consider using a JTable, which (of course) has inbuilt support for columns and rows.

回答2:

JTextPane is not meant to have "columns" and "rows": however you can alter its content through the NetBeans designer by editing its text property (click on the ... next to the text property in order to open a dialog where you can enter some multiline text for your JTextPane).

回答3:

You can add your custom tables like described here http://java-sl.com/JEditorPaneTables.html

and

row/cols insert described here http://java-sl.com/JEditorPaneTablesRowColumnInsert.html

回答4:

you can override JTextPane class methods and
add columns and rows to JTextPane:

import java.awt.Dimension;
import java.awt.FontMetrics;
import java.awt.Insets;
import java.awt.Rectangle;

import javax.swing.JTextPane;
import javax.swing.SwingConstants;
import javax.swing.text.StyledDocument;

public class TextPane extends JTextPane {

    private static final long serialVersionUID = 712368129156703980L;

    private int rows, columns, rowHeight, columnWidth;

    public TextPane() {

        super();

        rows = 0;
        columns = 0;

    }

    public TextPane(StyledDocument doc) {

        super(doc);

        rows = 0;
        columns = 0;

    }

    public TextPane(int rows, int columns) {

        super();

        this.rows = rows;
        this.columns = columns;

    }

    public TextPane(StyledDocument doc, int rows, int columns) {

        super(doc);

        this.rows = rows;
        this.columns = columns;

    }

    public int getRows() {
        return rows;

    }

    public void setRows(int rows) {

        if (rows < 0)
            throw new IllegalArgumentException("rows less than zero.");

        if (rows != this.rows) {

            this.rows = rows;
            revalidate();

        }

    }

    public int getRowHeight() {

        if (rowHeight == 0) {

            FontMetrics metrics = getFontMetrics(getFont());
            rowHeight = metrics.getHeight();

        }

        return rowHeight;

    }

    public int getColumns() {
        return columns;

    }

    public void setColumns(int columns) {

        if (columns < 0)
            throw new IllegalArgumentException("columns less than zero.");

        if (columns != this.columns) {

            this.columns = columns;
            revalidate();

        }

    }

    public int getColumnWidth() {

        if (columnWidth == 0) {

            FontMetrics metrics = getFontMetrics(getFont());
            columnWidth = metrics.charWidth('m');

        }

        return columnWidth;
    }

    public Dimension getPreferredSize() {

        Dimension d = super.getPreferredSize();

        d = (d == null) ? new Dimension(400, 400) : d;
        Insets insets = getInsets();

        if (columns != 0)
            d.width = Math.max(d.width, columns * columnWidth + insets.left + insets.right);

        if (rows != 0)
            d.height = Math.max(d.height, rows * rowHeight + insets.top + insets.bottom);

        return d;

    }

    protected String paramString() {

        return super.paramString() + ",columns" + columns + ",columnWidth" + columnWidth + ",rows" + rows
                + ",,rowsHeight" + rowHeight;

    }

    public Dimension getPreferredScrollableViewportSize() {

        Dimension size = super.getPreferredScrollableViewportSize();
        size = (size == null) ? new Dimension(400, 400) : size;
        Insets insets = getInsets();

        size.width = (columns == 0) ? size.width : columns * getColumnWidth() + insets.left + insets.right;

        size.height = (rows == 0) ? size.height : rows * getRowHeight() + insets.top + insets.bottom;

        return size;


    }

     public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {

            switch (orientation) {

            case SwingConstants.VERTICAL:
                return getRowHeight();

            case SwingConstants.HORIZONTAL:
                return getColumnWidth();

            default:
                throw new IllegalArgumentException("Invalid orientation: " + orientation);

            }

        }



}