在JTable中垂直滚动条 [英] vertical scroll bar in JTable

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本文介绍了在JTable中垂直滚动条的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有一个JTable中与它垂直滚动条,当我加入新行的滚动条将移动到新行。问题是滚动条是在框架中可见,但我不能把它的滚动。

这是我的方式创建的JTable

 表=新javax.swing.JTable中的(){
        公共布尔的isCellEditable(INT的rowIndex,诠释colIndex){
            返回false; //不允许任何单元格的编辑
        }
    };    模型=(的DefaultTableModel)table.getModel();    table.setRowHeight(20);    selectionModel设置= table.getSelectionModel();
    selectionModel.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);    //创建一对夫妇列
    model.addColumn(SERVERIP);
    model.addColumn(端口);
    model.addColumn(请求的数量);
    JTableHeader的头= table.getTableHeader();
    颜色C =新的色彩(163,250,250);
    header.setBackground(C);
        窗格=新JScrollPane的(表);
       pane.setViewportView(表);
        pane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_​​ALWAYS);        table.setFocusable(假);
     //这里的时候添加新行我叫滚动条
  scrollToNewRow(表,rowCount时,1);
  rowCount等++;
私有静态无效scrollToNewRow(JTable的表,诠释行,诠释山口){
    如果(!(table.getParent()的instanceof的JViewport)){
        返回;
    }
    JViewport的视口=(JViewport的)table.getParent();    //这矩形是相对于表,其中
    //单元格(0,0)的西北角始终是(0,0)。
    矩形矩形= table.getCellRect(0,0,真);    //相视口表中的位置
    点PT = viewport.getViewPosition();    //翻译单元的位置,以便它相对于
    //到视图,假设的西北角
    //观点是(0,0)
    rect.setLocation(rect.x-pt.x,rect.y-pt.y);    //滚动区域进入视野
    viewport.scrollRectToVisible(RECT);
}私有静态JScrollPane的getScrollPane(c成分){
    而((C = c.getParent())!= NULL)
        如果(C的instanceof JScrollPane的)
            返回(JScrollPane的)C;
    返回null;
}


解决方案

你总是叫 getCellRect 的单元格(0,0)。尝试更换:

 矩形RECT = table.getCellRect(0,0,真正的);

 矩形RECT = table.getCellRect(行,列,真正的);

I have one JTable with vertical scroll bar on it,when i added new row the scroll bar will move to the new row. The problem is scrollbar is visible in the frame but i can't scroll it.

this is way i created jtable

           table = new javax.swing.JTable(){
        public boolean isCellEditable(int rowIndex, int colIndex) {
            return false;   //Disallow the editing of any cell
        }
    };

    model = (DefaultTableModel) table.getModel();

    table.setRowHeight(20);

    selectionModel = table.getSelectionModel();
    selectionModel.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

    // Create a couple of columns
    model.addColumn("ServerIP");
    model.addColumn("Port");
    model.addColumn("Number of Request");
    JTableHeader header = table.getTableHeader();
    Color c = new Color(163, 250, 250);
    header.setBackground(c);
        pane = new JScrollPane(table);
       pane.setViewportView(table);
        pane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS); 

        table.setFocusable(false);


     //when added new row here i call scrollbar


  scrollToNewRow(table, rowCount, 1);
  rowCount++;




private static void scrollToNewRow(JTable table, int row, int col) {
    if (!(table.getParent() instanceof JViewport)) {
        return;
    }
    JViewport viewport = (JViewport)table.getParent();

    // This rectangle is relative to the table where the
    // northwest corner of cell (0,0) is always (0,0).
    Rectangle rect = table.getCellRect(0, 0, true);

    // The location of the viewport relative to the table
    Point pt = viewport.getViewPosition();

    // Translate the cell location so that it is relative
    // to the view, assuming the northwest corner of the
    // view is (0,0)
    rect.setLocation(rect.x-pt.x, rect.y-pt.y);

    // Scroll the area into view
    viewport.scrollRectToVisible(rect);
}

private static JScrollPane getScrollPane(Component c) {
    while ((c = c.getParent()) != null)
        if (c instanceof JScrollPane)
            return (JScrollPane) c;
    return null;
}

解决方案

You're always calling getCellRect for the cell at (0, 0). Try replacing:

Rectangle rect = table.getCellRect(0, 0, true);

with :

Rectangle rect = table.getCellRect(row, col, true);

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