Question

我有一个6x6的精灵网格。我试图创建以下行为，但我似乎有问题，selectedCell没有重置。它似乎在交换后随机保留一个选定的单元格，但选择和取消选择相同的单元格似乎有效。

当用户点击一个单元格时，它应该成为选定的单元格。
当用户再次点击该单元格时，所选单元格应重置为空（或无）
当用户点击一个单元格然后点击另一个不同的单元格时，应该交换这些单元格。（通过交换对象属性。在此之后，应重置所选单元格。）

我实现此功能的方式是否有任何明显错误，或者有更简单的方法吗？

单元格具有以下OnTouchEventMethod：

    @Override
public boolean onAreaTouched(final TouchEvent pSceneTouchEvent, final float pTouchAreaLocalX, final float pTouchAreaLocalY) {
        switch(pSceneTouchEvent.getAction()) {
         case TouchEvent.ACTION_DOWN:
             this.setScale(1.2f);
             this.setZIndex(999);
             this.gGrid.sortChildren();
             Log.d("TOUCH", "ACTION_DOWN");
             break;
         case TouchEvent.ACTION_UP:
             this.setScale(1.0f);
             this.setZIndex(1);
             this.gGrid.sortChildren();
             Log.d("TOUCH", "ACTION_UP");

                 gGrid.cellTouchEvent(this);

             break;
         case TouchEvent.ACTION_MOVE:
            break;
             }

    return false;
}

此代码将调用网格对象

    /**
 * called when a touch event is registered on a Grid Cell
 */
public void cellTouchEvent(GameGridCell cell) {
    if(cell.isGGCellVisible()) {

        if(this.selectedCell==null) {
            this.setSelectedCell(cell);//sets the selected cell as one is not set
            Log.d("TEST", "SET SELECTED CELL");
        } else {

            if(this.selectedCell == cell) {
                Log.d("TEST", "UNSET SELECTED CELLS");
                this.setSelectedCellToNull(); //Set selected cell to null as it was pressed twice
            } else if (this.selectedCell != cell) {
                this.swapCells(this.selectedCell, cell); //Swap the two cells
                this.setSelectedCellToNull(); //Ensure selected cell is set to null after swap
            }

        }

    } else if(!cell.isGGCellVisible()) {
        cell.showCellContents(); //Show the contents of the cell as it is not visible
    }
}

最后，这是进行实际单元格交换的代码

/**
 * Swaps the two cells passed in as parameters
 */
public void swapCells(GameGridCell cellA, GameGridCell cellB) {
    //First swap the locations in the gridItemsArray
    this.gridItemsArray.setValueAt(cellA.getGGCellID(), cellB);
    this.gridItemsArray.setValueAt(cellB.getGGCellID(), cellA);

    //Save cell A variables
    float x = cellA.getX();
    float y = cellA.getY();
    int id = cellA.getGGCellID();
    int type = cellA.getGGCellType();
    boolean visible = cellA.isVisible();

    //Set cell A to cells B variables
    cellA.setX(cellB.getX());
    cellA.setY(cellB.getY());
    cellA.setGGCellID(cellB.getGGCellID());
    cellA.setGGCellType(cellB.getGGCellType());
    cellA.setVisible(cellB.isVisible());

    //set cell B to saved variables
    cellB.setX(x);
    cellB.setY(y);
    cellB.setGGCellID(id);
    cellB.setGGCellType(type);
    cellB.setVisible(visible);

    //Update the cell ID text
    cellA.updateCellIDText();
    cellB.updateCellIDText();

    this.sortChildren(); //Finally sort the children
}

这里的评论是设置所选单元格的方法

    /**
 * @return the selectedCell
 */
public GameGridCell getSelectedCell() {
    return selectedCell;
}

/**
 * @param selectedCell the selectedCell to set
 */
public void setSelectedCell(GameGridCell selectedCell) {
    if(selectedCell==null) {
        this.selectedCell=null;
    } else {
        this.selectedCell = selectedCell;
    }       
    this.gameLevel.updateCellIDText();
}

/**
 * @param selectedCell the selectedCell to set
 */
public void setSelectedCellToNull() {
    this.selectedCell=null;
    this.gameLevel.updateCellIDText();
}

Answer 1

在触摸事件中执行操作，而不是使用break，返回true：

case TouchEvent.ACTION_UP:
         this.setScale(1.0f);
         this.setZIndex(1);
         this.gGrid.sortChildren();
         Log.d("TOUCH", "ACTION_UP");

             gGrid.cellTouchEvent(this);

         //don't use break 
         //break;
         //instead return true, which means you've handled touch
         return true;

为您处理的所有操作执行此操作。

交换网格中的项目

1 个答案: