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JTable滚动到指定的行索引

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我有一个位于 JScrollPane. 行内的JTable在运行时根据我的应用程序中发生的事件添加到表中 . 我想让一个新的行添加到表格时,scoll窗格滚动到表格的底部 .

对于JLists有 [ensureIndexIsVisible][1]() 强制列表中的特定索引可见 . 我正在寻找相同的东西,但对于JTable . 看起来我可能不得不手动移动滚动窗格上的滚动视图,但我认为必须有一个更简单的方法 .

5 回答

  • 5

    看这个例子:http://www.exampledepot.com/egs/javax.swing.table/Vis.html

    更新:链接现已过时,这里是代码(来自http://smi-protege.stanford.edu/repos/protege/protege-core/trunk/src/edu/stanford/smi/protege/util/ComponentUtilities.java

    public static void scrollToVisible(JTable table, int rowIndex, int vColIndex) {
            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(rowIndex, vColIndex, 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);
    
            table.scrollRectToVisible(rect);
    
            // Scroll the area into view
            //viewport.scrollRectToVisible(rect);
        }
    
  • 1

    这很简单,JTable也有scrollRectToVisible方法 . 如果你愿意,你可以尝试这样的东西,如果添加了一条新记录,滚动窗格会转到底部:

    jTable1.getSelectionModel().setSelectionInterval(i, i);
    jTable1.scrollRectToVisible(new Rectangle(jTable1.getCellRect(i, 0, true)));
    

    i 是最后添加记录的位置 .

  • 68

    JList内部使用scrollRectToVisible并指定要滚动到的坐标 . 我认为你将不得不为JTable重新编写类似的功能 .

  • 0

    第一个答案很有效,但所选行位于表格的底部 . 所以我创建了这个修改版本:

    private void scrollToVisible(int rowIndex, int vColIndex ) {
            JTable table = getTablePanel().getTable();
            if (!(table.getParent() instanceof JViewport)) {
                return;
            }
            if (table.getRowCount()<1){
                return;
            }
            JViewport viewport = (JViewport)table.getParent();
            // view dimension
            Dimension dim = viewport.getExtentSize();
            // cell dimension
            Dimension dimOne = new Dimension(0,0);
    
            // This rectangle is relative to the table where the
            // northwest corner of cell (0,0) is always (0,0).
            Rectangle rect = table.getCellRect(rowIndex, vColIndex, true);
            Rectangle rectOne;
            if (rowIndex+1<table.getRowCount()) {
                if (vColIndex+1<table.getColumnCount())
                    vColIndex++;
                rectOne = table.getCellRect(rowIndex+1, vColIndex, true);
                dimOne.width=rectOne.x-rect.x;
                dimOne.height=rectOne.y-rect.y;
            }
    
            // '+ veiw dimension - cell dimension' to set first selected row on the top
    
            rect.setLocation(rect.x+dim.width-dimOne.width, rect.y+dim.height-dimOne.height);
    
            table.scrollRectToVisible(rect);
        }
    

    现在,所选行位于表格的顶部 .

  • 35

    在我看来,设置视口位置而不是滚动表格要容易得多 . 以下是我的代码 .

    public void scrollCellToView(int rowIndex, int vColIndex) {
        if (!(this.getParent() instanceof JViewport)) {
            return;
        }
        JViewport viewport = (JViewport) this.getParent();
        Rectangle rect = this.getCellRect(rowIndex, vColIndex, true);
        Rectangle viewRect = viewport.getViewRect();
    
        int x = viewRect.x;
        int y = viewRect.y;
    
        if (rect.x >= viewRect.x && rect.x <= (viewRect.x + viewRect.width - rect.width)){
    
        } else if (rect.x < viewRect.x){
            x = rect.x;
        } else if (rect.x > (viewRect.x + viewRect.width - rect.width)) {
            x = rect.x - viewRect.width + rect.width;
        }
    
        if (rect.y >= viewRect.y && rect.y <= (viewRect.y + viewRect.height - rect.height)){
    
        } else if (rect.y < viewRect.y){
            y = rect.y;
        } else if (rect.y > (viewRect.y + viewRect.height - rect.height)){
            y = rect.y - viewRect.height + rect.height;
        }
    
        viewport.setViewPosition(new Point(x,y));
    }
    

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