private int getViewHeight() {
DraweeView<GenericDraweeHierarchy> draweeView = getDraweeView();
if (draweeView != null) {
return draweeView.getHeight() - draweeView.getPaddingTop() - draweeView.getPaddingBottom();
}
return 0;
}
@Override
public void onDrag(float dx, float dy) {
DraweeView<GenericDraweeHierarchy> draweeView = getDraweeView();
if (draweeView != null && !mScaleDragDetector.isScaling()) {
mMatrix.postTranslate(dx, dy);
checkMatrixAndInvalidate();
ViewParent parent = draweeView.getParent();
if (parent == null) {
return;
}
if (mAllowParentInterceptOnEdge
&& !mScaleDragDetector.isScaling()
&& !mBlockParentIntercept) {
if (mScrollEdge == EDGE_BOTH
|| (mScrollEdge == EDGE_LEFT && dx >= 1f)
|| (mScrollEdge == EDGE_RIGHT && dx <= -1f)) {
parent.requestDisallowInterceptTouchEvent(false);
}
} else {
parent.requestDisallowInterceptTouchEvent(true);
}
}
}
@Override
public void setScale(float scale, boolean animate) {
DraweeView<GenericDraweeHierarchy> draweeView = getDraweeView();
if (draweeView != null) {
setScale(scale, (draweeView.getRight()) / 2, (draweeView.getBottom()) / 2, false);
}
}
private void resetMatrix() {
mMatrix.reset();
checkMatrixBounds();
DraweeView<GenericDraweeHierarchy> draweeView = getDraweeView();
if (draweeView != null) {
draweeView.invalidate();
}
}
private RectF getDisplayRect(Matrix matrix) {
DraweeView<GenericDraweeHierarchy> draweeView = getDraweeView();
if (draweeView == null || (mImageInfoWidth == -1 && mImageInfoHeight == -1)) {
return null;
}
mDisplayRect.set(0.0F, 0.0F, mImageInfoWidth, mImageInfoHeight);
draweeView.getHierarchy().getActualImageBounds(mDisplayRect);
matrix.mapRect(mDisplayRect);
return mDisplayRect;
}
@Override
public void onFling(float startX, float startY, float velocityX, float velocityY) {
DraweeView<GenericDraweeHierarchy> draweeView = getDraweeView();
if (draweeView == null) {
return;
}
mCurrentFlingRunnable = new FlingRunnable(draweeView.getContext());
mCurrentFlingRunnable.fling(getViewWidth(), getViewHeight(), (int) velocityX, (int) velocityY);
draweeView.post(mCurrentFlingRunnable);
}
private int getViewWidth() {
DraweeView<GenericDraweeHierarchy> draweeView = getDraweeView();
if (draweeView != null) {
return draweeView.getWidth() - draweeView.getPaddingLeft() - draweeView.getPaddingRight();
}
return 0;
}
public void checkMatrixAndInvalidate() {
DraweeView<GenericDraweeHierarchy> draweeView = getDraweeView();
if (draweeView == null) {
return;
}
if (checkMatrixBounds()) {
draweeView.invalidate();
}
}
private void checkMinScale() {
DraweeView<GenericDraweeHierarchy> draweeView = getDraweeView();
if (draweeView == null) {
return;
}
if (getScale() < mMinScale) {
RectF rect = getDisplayRect();
if (null != rect) {
draweeView.post(
new AnimatedZoomRunnable(getScale(), mMinScale, rect.centerX(), rect.centerY()));
}
}
}
@Override
public void setScale(float scale, float focalX, float focalY, boolean animate) {
DraweeView<GenericDraweeHierarchy> draweeView = getDraweeView();
if (draweeView == null || scale < mMinScale || scale > mMaxScale) {
return;
}
if (animate) {
draweeView.post(new AnimatedZoomRunnable(getScale(), scale, focalX, focalY));
} else {
mMatrix.setScale(scale, scale, focalX, focalY);
checkMatrixAndInvalidate();
}
}
@Override
public void run() {
if (mScroller.isFinished()) {
return;
}
DraweeView<GenericDraweeHierarchy> draweeView = getDraweeView();
if (draweeView != null && mScroller.computeScrollOffset()) {
final int newX = mScroller.getCurrX();
final int newY = mScroller.getCurrY();
mMatrix.postTranslate(mCurrentX - newX, mCurrentY - newY);
draweeView.invalidate();
mCurrentX = newX;
mCurrentY = newY;
postOnAnimation(draweeView, this);
}
}
public Attacher(DraweeView<GenericDraweeHierarchy> draweeView) {
mDraweeView = new WeakReference<DraweeView<GenericDraweeHierarchy>>(draweeView);
draweeView.getHierarchy().setActualImageScaleType(ScalingUtils.ScaleType.FIT_CENTER);
draweeView.setOnTouchListener(this);
mScaleDragDetector = new ScaleDragDetector(draweeView.getContext(), this);
mGestureDetector =
new GestureDetectorCompat(
draweeView.getContext(),
new GestureDetector.SimpleOnGestureListener() {
@Override
public void onLongPress(MotionEvent e) {
super.onLongPress(e);
if (null != mLongClickListener) {
mLongClickListener.onLongClick(getDraweeView());
}
}
});
mGestureDetector.setOnDoubleTapListener(new DefaultOnDoubleTapListener(this));
}