控制jQuery中的可拖动运动 [英] Control draggable movement in jQuery

问题描述

如何控制jquery中可拖动对象的移动?

how can I control de movement of a draggable in jquery?

我需要执行类似于捕捉到网格"的操作，其中可拖动对象每移动"x"和"y"像素

I need to do something similar to the "snap to grid" where the draggable moves every "x" and "y" pixels

我不能使用"grid:[x，y]"(2D)，因为我需要在等距网格(3D)上进行拖动(我将在以后开发网格，首先需要控制拖动)

I can't use "grid: [x, y]" (2D) because I need to make the drag on an isometric grid (3D) (I will develop the grid later, I first need to controll the drag)

例如:当我开始拖动时，可拖动对象不应移动，当"x"和"y"处于特定条件下时，它必须捕捉到另一个位置

for example: when I start the dragging, the draggable shouldn't move, it has to snap to another position when the "x" and "y" are under certain conditions

提前谢谢！

推荐答案

好的，我已经找到了想要的东西！

ok, I've found what I was looking for!

在此链接中是我需要的代码

代码是这样的:

//内部拖动:功能(事件，用户界面)

//inside drag: function(event, ui)

    var offset = $(this).parent().offset();
    var GRID_SPACING = 10;
    var SELECTION_OFFSET_X = 10;
    var SELECTION_OFFSET_Y = 3;            

    if (parseInt(event.clientX / GRID_SPACING) % 2 == 0)
    {
        var row = Math.floor((event.clientY - offset.top) / GRID_SPACING) + Math.floor(event.clientX / (2 * GRID_SPACING));
        var col = -Math.floor((event.clientY - offset.top) / GRID_SPACING) + Math.floor((event.clientX + GRID_SPACING) / (2 * GRID_SPACING));
    }
    else
    {
        var row = Math.floor((event.clientY + GRID_SPACING / 2 - offset.top) / GRID_SPACING) + Math.floor(event.clientX / (2 * GRID_SPACING));
        var col = -Math.floor((event.clientY + GRID_SPACING / 2 - offset.top) / GRID_SPACING) + Math.floor((event.clientX + GRID_SPACING) / (2 * GRID_SPACING));
    }

    var new_x = row * GRID_SPACING + col * GRID_SPACING - SELECTION_OFFSET_X;
    var new_y = (row * (GRID_SPACING / 2)) - (col * (GRID_SPACING / 2));                     

    if(event.clientX == new_x + GRID_SPACING * 2)
    {
        ui.position.left = new_x;
        new_x = event.clientX;
    }

    if(event.clientY == new_y + GRID_SPACING)
    {
        ui.position.top = new_y;
        new_y = event.clientY;
    }                    

    ui.position.left = new_x;
    ui.position.top = new_y;

我更改了一些常量以适应我的网格...

I changed some of the constants to adjust to my grid...

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