@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;
}
public DashFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
setWillNotDraw(false);
final int margin = Utils.dip2px(context, 5);
mDelBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_stamp_close);
mDragBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_stamp_drag);
setLayoutParams(
new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
mDashPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mDashPaint.setColor(Color.GRAY);
mDashPaint.setStyle(Paint.Style.STROKE);
mDashPaint.setStrokeWidth(3);
mDashPath = new Path();
mRefreshHandler = new RefreshHandler(this);
mDashFloats = new float[] {DASH_ON_WIDTH, DASH_OFF_WIDTH};
mPathEffects = new PathEffect[mDashMinSize];
showDashBorder(true);
mTouchSlopSquare =
ViewConfiguration.get(context).getScaledTouchSlop()
* ViewConfiguration.get(context).getScaledTouchSlop();
getViewTreeObserver()
.addOnPreDrawListener(
new ViewTreeObserver.OnPreDrawListener() {
@Override
public boolean onPreDraw() {
if (!isRunPreDrawListener) {
return true;
}
isRunPreDrawListener = false;
int childCount = getChildCount();
if (childCount < 1) {
return false;
}
Rect rect = new Rect();
mChildView.getLocalVisibleRect(rect);
// 计算虚线框绘制位置，注意虚线框与label之间存在margin
mDashRectF.left = rect.left - margin;
mDashRectF.top = rect.top - margin;
mDashRectF.right = rect.right + margin;
mDashRectF.bottom = rect.bottom + margin;
// 计算删除按钮初始中心坐标
mDelPoint[0] = mDashRectF.left;
mDelPoint[1] = mDashRectF.top;
// 计算拖放按钮初始中心坐标
mDragPoint[0] = mDashRectF.right;
mDragPoint[1] = mDashRectF.bottom;
if (mViewMatrix.isIdentity()) {
mCenterPoint[0] = rect.width() >> 1;
mCenterPoint[1] = rect.height() >> 1;
int halfWidth = getWidth() >> 1;
int halfHeight = getHeight() >> 1;
// 移动到中心
translate(halfWidth - mCenterPoint[0], halfHeight - mCenterPoint[1]);
} else {
int newCenterX = rect.width() >> 1;
int newCenterY = rect.height() >> 1;
// 根据新中心调整矩阵
mViewMatrix.reset();
mViewMatrix.postTranslate(
mCenterPoint[0] - newCenterX, mCenterPoint[1] - newCenterY);
mViewMatrix.postRotate(mCurRotation, mCenterPoint[0], mCenterPoint[1]);
mViewMatrix.postScale(
mCurScaleFactor, mCurScaleFactor, mCenterPoint[0], mCenterPoint[1]);
mViewNoRotateMatrix.reset();
mViewNoRotateMatrix.postTranslate(
mCenterPoint[0] - newCenterX, mCenterPoint[1] - newCenterY);
mViewNoRotateMatrix.postScale(
mCurScaleFactor, mCurScaleFactor, mCenterPoint[0], mCenterPoint[1]);
updateBtnDrawRect();
}
// 将view转换为bitmap，便于旋转、缩放时提高性能
mLabelBitmap = ImageUtils.captureScreenByDraw(mChildView);
mDashPath.reset();
mDashPath.addRect(mDashRectF, Path.Direction.CCW);
removeAllViews();
return true;
}
});
}