Question

我正在使用经我自己的模式支持的Sun s例(JTreeTable)稍加修改的文本。这将是第三个例子(在上)。

除拖拉和退款外,一切照样工作。我希望DnD更像“。 JTree提供。由于<代码>JTreeTable是一个延伸的<代码>JTable,该编码为<代码>JTable.DropLocation,用于确定退学地点,在将足迹投入<代码>JTreeTable(无路程,无儿童指数)的树冠时,没有提供足够的信息。我已经解决了这一问题,为此创建了一个以<条码>、DropLocation的类别,其基础是<代码>JTable和JTree的版本。页: 1 上文提及的<代码>JTreeTable>提供的树冠类别,向用户展示这一新信息(现在,如果在树冠栏内,如果你预计会从<代码>上的话,该新节日是否将放置在选定的树冠之内、之前或之后)。 JTree。

There is one problem though. The mouse cursor is going crazy when the drop location is being rendered inside the tree column. It appears and then disappears a few milliseconds later or this happens so fast that the drag cursor is not even shown. This happens with the unmodified Sun s example too. I am completely in the dark as to why this is happening. Did find another person with the same problem at http://www.java.net/node/663106, but the solution provided there seems to set the component s drop location to null and cannot be retrieved using JTreeTable.getDropLocation() method any more. I need this to convert it to my modified DropLocation and then paint stuff based on it. I am so close to a proper solution for my use case that I can taste it. This cursor blinking thing is the only obstacle in my way. Any ideas?

使用 Java1.6。

P.S.:I ve决定了一种习俗:JTreeTable,而不是现有成分之一(如Netbeans Outline或JXTreeTable),因为它们似乎都患有< 代码>JTable.DropLocation 问题,在选定的树苗之前或之后(仅位于内)不支持退学。如果你知道一个能够提供这种功能的组成部分,那么我很乐于听到。

Answer 1

http://bugs.java.com/view_bug.do?bug_id=6700748"rel=“noreferer”#6700748 (可查的是,收入泡沫的衰期需要与......挂钩。) 因此,援引JXTreeTable的固定点:

    /**
     * {@inheritDoc} <p>
     * 
     * Overridden to hack around #766-swingx: cursor flickering in DnD
     * when dragging over tree column. This is a core bug (#6700748) related
     * to painting the rendering component on a CellRendererPane. A trick
     * around is to let this return false. <p>
     * 
     * This implementation applies the trick, that is returns false always. 
     * The hack can be disabled by setting the treeTable s client property
     * DROP_HACK_FLAG_KEY to Boolean.FALSE. 
     * 
     */
    @Override
    public boolean isVisible() {
        return shouldApplyDropHack() ? false : super.isVisible();
    }


    /**
     * Returns a boolean indicating whether the drop hack should be applied.
     * 
     * @return a boolean indicating whether the drop hack should be applied.
     */
    protected boolean shouldApplyDropHack() {
        return !Boolean.FALSE.equals(treeTable.getClientProperty(DROP_HACK_FLAG_KEY));
    }

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