@Override
public boolean onTouchEvent(MotionEvent event) {
boolean handled = true;
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
{
// 删除按钮接收事件
if (mShowDashBorder && mDelDrawRectF.contains(event.getX(), event.getY())) {
if (getParent() instanceof ViewGroup) {
((ViewGroup) getParent()).removeView(DashFrameLayout.this);
}
break;
}
// 拖放按钮接收事件
if (mShowDashBorder && mDragDrawRectF.contains(event.getX(), event.getY())) {
mode = SINGLE_ZOOM;
showDashBorder(true);
mPreDistance =
Utils.calcDistance(mCenterPoint[0], mCenterPoint[1], event.getX(), event.getY());
mPreRotation =
Utils.calcRotation(mCenterPoint[0], mCenterPoint[1], event.getX(), event.getY());
break;
}
/** 判断虚线框是否接收事件； 因旋转后无法直接判断事件是否在rect内， 可将坐标点反向旋转后再与未进行旋转的rect进行比较判断 */
mDashDrawRectF.set(mDashRectF);
mViewNoRotateMatrix.mapRect(mDashDrawRectF);
Matrix inverseMatrix = new Matrix();
// 获取反向旋转矩阵
inverseMatrix.postRotate(360 - mCurRotation, mCenterPoint[0], mCenterPoint[1]);
// 将当前坐标反向旋转，再进行判断
float[] eventPoint = {event.getX(), event.getY()};
inverseMatrix.mapPoints(eventPoint);
if (mDashDrawRectF.contains(eventPoint[0], eventPoint[1])) {
mode = DRAG;
mInitTouchX = event.getX();
mInitTouchY = event.getY();
mLastTouchX = event.getX();
mLastTouchY = event.getY();
} else {
handled = false;
}
showDashBorder(handled);
if (handled && mListener != null) {
mListener.onFocus();
mAlwaysInTapRegion = true;
}
break;
}
case MotionEvent.ACTION_MOVE:
{
if (mAlwaysInTapRegion) {
float deltaX = event.getX() - mInitTouchX;
float deltaY = event.getY() - mInitTouchY;
// 判断是否在点击区域内
if ((deltaX * deltaX) + (deltaY * deltaY) > mTouchSlopSquare) {
mAlwaysInTapRegion = false;
}
}
if (mode == SINGLE_ZOOM || mode == DOUBLE_ZOOM) {
float curDistance, endRotation;
if (mode == SINGLE_ZOOM) {
// 单指缩放、旋转
curDistance =
Utils.calcDistance(mCenterPoint[0], mCenterPoint[1], event.getX(), event.getY());
endRotation =
Utils.calcRotation(mCenterPoint[0], mCenterPoint[1], event.getX(), event.getY());
} else {
// 双指缩放、旋转
curDistance = Utils.calcDistance(event);
endRotation = Utils.calcRotation(event);
}
scale(curDistance / mPreDistance);
mPreDistance = curDistance;
rotate(endRotation - mPreRotation);
mPreRotation = endRotation;
} else if (mode == DRAG) {
translate(event.getX() - mLastTouchX, event.getY() - mLastTouchY);
mLastTouchX = event.getX();
mLastTouchY = event.getY();
}
invalidate();
break;
}
case MotionEvent.ACTION_POINTER_DOWN:
{
mAlwaysInTapRegion = false;
if (mode != SINGLE_ZOOM) {
mode = DOUBLE_ZOOM;
mPreDistance = Utils.calcDistance(event);
mPreRotation = Utils.calcRotation(event);
}
break;
}
case MotionEvent.ACTION_UP:
{
mode = NONE;
mPreRotation = 0.f;
if (mAlwaysInTapRegion && mPreShowDashBorder && mListener != null) {
mListener.onClick();
}
mAlwaysInTapRegion = false;
break;
}
case MotionEvent.ACTION_POINTER_UP:
{
if (mode != SINGLE_ZOOM) {
mode = NONE;
mPreRotation = 0.f;
}
break;
}
}
return handled;
}
