// 注册按钮的拖拽监听，拖拽结束时丢弃物品
private void addDragAndDrop(GButton btn)
{
btn.onTouchBegin.Add((EventContext evenContext) => {
if (touchID == -1)
{
InputEvent inputEvent = (InputEvent)evenContext.data;
touchID = inputEvent.touchId;
Vector2 localPos = GRoot.inst.GlobalToLocal(new Vector2(inputEvent.x, inputEvent.y));
float posX = localPos.x;
float posY = localPos.y;
startX = posX;
startY = posY;
dragIcon.url = btn.icon;
dragIcon.SetXY(posX - dragIcon.width / 2, posY - dragIcon.height / 2);
dragIcon.visible = true;
evenContext.CaptureTouch();
}
});
btn.onTouchMove.Add((EventContext evenContext) =>
{
InputEvent inputEven = (InputEvent)evenContext.data;
if (touchID != -1 && inputEven.touchId == touchID)
{
Vector2 localPos = GRoot.inst.GlobalToLocal(new Vector2(inputEven.x, inputEven.y));
float posX = localPos.x;
float posY = localPos.y;
dragIcon.SetXY(posX - dragIcon.width / 2, posY - dragIcon.height / 2);
}
});
btn.onTouchEnd.Add((EventContext evenContext) => {
InputEvent inputEvent = (InputEvent)evenContext.data;
if (touchID != -1 && touchID == inputEvent.touchId)
{
Vector2 localPos = GRoot.inst.GlobalToLocal(new Vector2(inputEvent.x, inputEvent.y));
// 计算偏移量，判断为点击还是丢弃
float deltaX = Mathf.Abs(startX - localPos.x);
float deltaY = Mathf.Abs(startY - localPos.y);
float redio = Mathf.Sqrt(deltaX * deltaX + deltaY * deltaY);
// 在一个固定圆弧内
if (redio < useRedio)
{
Debug.Log("使用");
useGoods(btn);
}
else
{
Debug.Log("丢弃");
dropGoods(btn);
}
touchID = -1;
}
});
}
public void StartDrag(GObject source, string icon, object sourceData, int touchPointID = -1)
{
if (_agent.parent != null)
{
return;
}
_sourceData = sourceData;
_agent.url = icon;
GRoot.inst.AddChild(_agent);
Vector2 pt = source.LocalToGlobal(new Vector2(0, 0));
_agent.SetXY(pt.x, pt.y);
_agent.StartDrag(null, touchPointID);
}
