Java JInternalFrames收听JDesktopPane事件

有什么简单的方法可以让我的jinternalframes两全其美吗

• 当我希望它们作为jdesktoppane的一部分时嵌入
• 也可以移动，能够处理自己的事件

希望这张照片能有所帮助。现在，我有我的代码将物品拖到你的播放器上，并将其插入下一个可用的背包位置，但我也希望能够将其拖到任何背包位置，但正如你所看到的，它在下面绘制。有没有什么快速而肮脏的方法来补救这个问题？我的JDesktopPane在顶部有一个面板，在那里所有的东西都被涂上了漆（当然除了jinternalframes）。对不起，所有的代码和没有SSCCEE。只是觉得最好表现出我的逻辑

theDesktop.addMouseMotionListener(new MouseMotionListener() {
    @Override
    public void mouseDragged(MouseEvent e) {
        updateMouseCursor(e);
        if (MapGamePanel.draggingItem){
            Point point = e.getPoint();
            MapGamePanel.currentX = point.x;
            MapGamePanel.currentY = point.y;
        }
    }

    @Override
    public void mouseMoved(MouseEvent e) {
        updateMouseCursor(e);
    }
});

theDesktop.addMouseListener(new MouseListener() {
    @Override
    public void mousePressed(MouseEvent e) {
        if (e.getButton() == MouseEvent.BUTTON1){ //left
            int whiteLeftSpace = (theDesktop.getWidth() - xTiles*32)/2;
            boolean inGamePanel = e.getX() > whiteLeftSpace && e.getX() < (xTiles*32 + whiteLeftSpace) && e.getY() < yTiles*32;
            String globalCoords = localToGlobalCoords((e.getX()-whiteLeftSpace)/32 + "," + e.getY()/32);
            if (inGamePanel){
                //looking for tiles with no mobs or players and loot
                String[] globalCoordsSplit = globalCoords.split(",");
                int globalX = Integer.parseInt(globalCoordsSplit[0]);
                int globalY = Integer.parseInt(globalCoordsSplit[1]);
                if ((!(globalX == characterX && globalY == characterY)) && //not under character
                        ((globalX-1) == characterX || globalX == characterX || (globalX+1) == characterX) && //(+/-) 1 xTile
                        ((globalY-1) == characterY || globalY == characterY || (globalY+1) == characterY)){ //(+/-) 1 yTile
                    HashMap <String, String> dropsToDrag = new HashMap <String, String>();
                    Boolean mobPresent = false;
                    Boolean playerPresent = false;
                    if (MapGamePanel.entityInfoHashTable.containsKey(globalCoords)){ //no mobs/npcs
                        mobPresent = true;
                    }
                    Iterator<Entry<String, String>> it = MapGamePanel.entityInfoHashTable.entrySet().iterator();
                    while (it.hasNext()) {
                        Entry<String, String> pairs = it.next();
                        String key = pairs.getKey();
                        if (!key.contains(",") && !key.contains("-")){
                            String[] values = pairs.getValue().split("\\|");
                            String tempCoords = values[0];
                            if (globalCoords.equals(tempCoords)){ //player on spot
                                playerPresent = true;
                            }
                        } else if (key.contains("-")){
                            String[] splitKey = key.split("-");
                            if (splitKey[0].equals(globalCoords)){
                                dropsToDrag.put(key, pairs.getValue());
                            }
                        }
                    }
                    int smallEntityId = Integer.MAX_VALUE; //2147483647
                    if (!mobPresent && !playerPresent && !dropsToDrag.isEmpty()){
                        Iterator<Entry<String, String>> it2 = dropsToDrag.entrySet().iterator();
                        while (it2.hasNext()) {
                            Entry<String, String> pairs = it2.next();
                            String[] keyWithPK = pairs.getKey().split("-");
                            String tmpCoords = keyWithPK[0];
                            String[] coordsSplit = tmpCoords.split(",");
                            int tempX = Integer.parseInt(coordsSplit[0]);
                            int tempY = Integer.parseInt(coordsSplit[1]);
                            int tmpEntityId = Integer.parseInt(keyWithPK[1]);
                            String[] values = pairs.getValue().split("\\|");
                            String tmpId = values[0];
                            int tmploot_amt = Integer.parseInt(values[1]);
                            String tmploot_filename = values[2];
                            if (tmpEntityId < smallEntityId){
                                smallEntityId = tmpEntityId;
                                MapGamePanel.dragItemXCoord = tempX;
                                MapGamePanel.dragItemYCoord = tempY;
                                MapGamePanel.dragItemEntityId = tmpEntityId;
                                MapGamePanel.dragItemId = tmpId;
                                MapGamePanel.dragItemAmt = tmploot_amt;
                                MapGamePanel.draggingItemFilename = tmploot_filename;
                            }
                        }
                        MapGamePanel.draggingItem = true;
                        Point point = e.getPoint();
                        MapGamePanel.startX = point.x;
                        MapGamePanel.startY = point.y;  
                    }
                }
            }
        }
    }

    @Override
    public void mouseReleased(MouseEvent e) {
        if (e.getButton() == MouseEvent.BUTTON3){ //right
            movementBitKeys.keyReleased(87);
            movementBitKeys.keyReleased(68);
            movementBitKeys.keyReleased(83);
            movementBitKeys.keyReleased(65);
            mouseHeld = false;
        }
        if (MapGamePanel.draggingItem){
            int whiteLeftSpace = (theDesktop.getWidth() - xTiles*32)/2;
            String[] globalCoords = localToGlobalCoords((MapGamePanel.currentX-whiteLeftSpace)/32 + "," + MapGamePanel.currentY/32).split(",");
            int globalX = Integer.parseInt(globalCoords[0]);
            int globalY = Integer.parseInt(globalCoords[1]);

            String[] startCoords = localToGlobalCoords((MapGamePanel.startX-whiteLeftSpace)/32 + "," + MapGamePanel.startY/32).split(",");
            int startX = Integer.parseInt(startCoords[0]);
            int startY = Integer.parseInt(startCoords[1]);
            if (globalX == characterX && globalY == characterY){
                    sendToServer("pickupItem|" + startX + "," + startY + "-" + MapGamePanel.dragItemEntityId + "|backpack|-1|" + MapGamePanel.dragItemAmt);
            } else if (((globalX-1) == characterX || globalX == characterX || (globalX+1) == characterX) &&
                    ((globalY-1) == characterY || globalY == characterY || (globalY+1) == characterY)){
                if (!(startX == globalX && startY == globalY)){
                    sendToServer("moveItem|" + startX + "," + startY + "-" + MapGamePanel.dragItemEntityId + "|ground|" + globalX + "," + globalY + "|-1|" + MapGamePanel.dragItemAmt);
                }
            }
            MapGamePanel.draggingItem = false;
        }
    }

    @Override
    public void mouseClicked(MouseEvent e) {}

    @Override
    public void mouseEntered(MouseEvent e) {}

    @Override
    public void mouseExited(MouseEvent e) {}
});

和是使用

JLayeredPane

的好例子

显示在玻璃窗格上拖动

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JComponent#setComponentPopupMenu（）

将是添加上下文菜单的一种方式。

为了解决这个问题，我创建了一个JLabel，当项目处于我的（DragingItem boolean）状态时，我将始终更新它。下面是一些代码。谢谢大家的帮助和想法

public void mouseDragged(MouseEvent e) {
    updateMouseCursor(e);
    if (MapGamePanel.draggingItem){
        Point point = e.getPoint();
        MapGamePanel.currentX = point.x;
        MapGamePanel.currentY = point.y;
        dragJLabel.setBounds(MapGamePanel.currentX, MapGamePanel.currentY, 32, 32);
    }
}

public void mousePressed(MouseEvent e) {
    MapGamePanel.startX = point.x;
    MapGamePanel.startY = point.y;
    dragJLabel = new JLabel(MapGamePanel.draggingItemFilename);
    dragJLabel.setBounds(MapGamePanel.startX, MapGamePanel.startY, 32, 32);
    theDesktop.add(dragJLabel, JLayeredPane.DRAG_LAYER);
}

对MouseRelease来说也是一样的，我会移除JLabel。你也可以在我的截图中看到，现在还没有图像，只有文本，只是快速编码，这样我就可以在这里提供答案来帮助其他人

---

看起来拖放是您在这里的最佳选择。这很有意义。。。你能详细说明一下吗？我必须承认我没有拖放代码的经验。可能是一个例子或另一篇文章，我可以阅读？谢谢你的反馈，顺便说一句。我希望我有时间写一个例子。这是一个更复杂的Swing特性，至少对我来说是这样，我会让你参考教程，并在这个网站上搜索示例。这就是我过去为此所做的。我会做的，谢谢你的帮助，从哪里开始：D.我要休息一下，所以如果你以后有时间，请随意写这个例子；）不太可能很快发生。现在的工作责任很重。我试着使用JLayeredPane的概念，但运气不太好。。。现在，我只是想在我的游戏地图上画一个随机的JLabel，但无法让它工作。。我已经发布了上面的代码。。。有什么线索吗？我想你需要为层使用不同的数字，

我通常忘记做

setBounds（）`。对于我的游戏，除了拖拽绘画（在本例中使用jlabel测试）之外，所有内容都应该在同一层上。默认图层低于拖动图层（最高）。所以你认为setBounds（）就是它不起作用的原因？是的，setBounds（）就是问题所在。非常感谢卡塔琳娜。我将此标记为“为您的利益而接受”，然后当我提出我的解决方案时，我将发布我为任何人所做的事情，谁发现此帖子，我将受益。哈哈哈，不，不幸的是，这与我的艺术技能一样好。。。如果需要，请访问我的网站：）www.kisnardonline.com

public void mouseDragged(MouseEvent e) {
    updateMouseCursor(e);
    if (MapGamePanel.draggingItem){
        Point point = e.getPoint();
        MapGamePanel.currentX = point.x;
        MapGamePanel.currentY = point.y;
        dragJLabel.setBounds(MapGamePanel.currentX, MapGamePanel.currentY, 32, 32);
    }
}

public void mousePressed(MouseEvent e) {
    MapGamePanel.startX = point.x;
    MapGamePanel.startY = point.y;
    dragJLabel = new JLabel(MapGamePanel.draggingItemFilename);
    dragJLabel.setBounds(MapGamePanel.startX, MapGamePanel.startY, 32, 32);
    theDesktop.add(dragJLabel, JLayeredPane.DRAG_LAYER);
}