// 鼠标在屏幕上抬起
public void onScreenMouseUp()
{
mMouseDown = false;
mDraging = false;
mReleaseDragCallback?.Invoke();
}
public void setPosition(Vector3 pos)
{
mWindow.setPosition(pos);
mPositionChangeCallback?.Invoke();
}
public override void update(float elapsedTime)
{
base.update(elapsedTime);
if (mDraging)
{
Vector3 curPosition = mWindow.getPosition();
Vector3 prePos = curPosition;
// 拖拽状态时,鼠标移动量就是窗口的移动量,此处未考虑父窗口的缩放不为1的情况
Vector3 moveDelta = getMousePosition() - mStartDragMousePosition;
if (mDragDirection == DRAG_DIRECTION.HORIZONTAL)
{
moveDelta.y = 0.0f;
}
else if (mDragDirection == DRAG_DIRECTION.VERTICAL)
{
moveDelta.x = 0.0f;
}
curPosition = mStartDragWindowPosition + moveDelta;
if (mClampInRange)
{
clampPosition(ref curPosition);
}
if (!isVectorEqual(ref prePos, ref curPosition))
{
setPosition(curPosition);
mDragingCallback?.Invoke();
}
}
else
{
// 自动停靠最近的边
if (mAutoMoveToEdge)
{
Vector3[] minMaxPos = getLocalMinMaxPixelPos();
Vector2 minPos = minMaxPos[0];
Vector2 maxPos = minMaxPos[1];
Vector3 curPosition = mWindow.getPosition();
Vector3 targetPosition = curPosition;
// 获得当前最近的边
if (mDragDirection == DRAG_DIRECTION.HORIZONTAL)
{
targetPosition.x = getNearest(curPosition.x, minPos.x, maxPos.x);
}
else if (mDragDirection == DRAG_DIRECTION.VERTICAL)
{
targetPosition.y = getNearest(curPosition.y, minPos.y, maxPos.y);
}
else
{
mDisArray[0] = abs(curPosition.x - minPos.x);
mDisArray[1] = abs(curPosition.x - maxPos.x);
mDisArray[2] = abs(curPosition.y - minPos.y);
mDisArray[3] = abs(curPosition.y - maxPos.y);
int minIndex = -1;
float minDistance = 0.0f;
for (int i = 0; i < 4; ++i)
{
if (minIndex < 0 || minDistance > mDisArray[i])
{
minIndex = i;
minDistance = mDisArray[i];
}
}
if (minIndex == 0)
{
targetPosition.x = minPos.x;
}
else if (minIndex == 1)
{
targetPosition.x = maxPos.x;
}
else if (minIndex == 2)
{
targetPosition.y = minPos.y;
}
else if (minIndex == 3)
{
targetPosition.y = maxPos.y;
}
}
if (!isVectorEqual(ref curPosition, ref targetPosition))
{
Vector3 pos = lerp(curPosition, targetPosition, elapsedTime * mMoveToEdgeSpeed);
setPosition(pos);
}
}
else
{
Vector3 curPosition = mWindow.getPosition();
// 如果滑动已经超过了正常区域,则手指放开时回弹到正常范围内
Vector3 validPos = curPosition;
if (!isValidPosition(ref curPosition, ref validPos, mAlignTopOrLeft))
{
Vector3 newPos = lerp(curPosition, validPos, elapsedTime * mAutoClampSpeed);
if (!isVectorEqual(ref newPos, ref curPosition))
{
setPosition(newPos);
}
else
{
mMoveSpeed = 0.0f;
}
}
else
{
// 按照当前滑动速度移动
if (mMoveSpeed > 0.0f)
{
// 只有鼠标未按下并且不自动停靠到最近的边时才衰减速度
Vector3 prePos = curPosition;
mMoveSpeed = lerp(mMoveSpeed, 0.0f, elapsedTime * mAttenuateFactor, 10.0f);
curPosition += mMoveNormal * mMoveSpeed * mMoveSpeedScale * elapsedTime;
clampPosition(ref curPosition);
if (!isVectorEqual(ref prePos, ref curPosition))
{
setPosition(curPosition);
}
else
{
mMoveSpeed = 0.0f;
}
}
}
}
}
}