/******************************************************************************* * Copyright 2011, 2012 Chris Banes. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *******************************************************************************/ package com.derson.pumelo.widget.pulltorefresh; import android.annotation.SuppressLint; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Matrix; import android.graphics.drawable.Drawable; import android.view.View; import android.view.ViewGroup; import android.view.animation.Animation; import android.view.animation.RotateAnimation; import android.widget.ImageView.ScaleType; @SuppressLint("ViewConstructor") public class FlipLoadingLayout extends LoadingLayout { static final int FLIP_ANIMATION_DURATION = 150; private final Animation mRotateAnimation, mResetRotateAnimation; public FlipLoadingLayout(Context context, final PullToRefreshBase.Mode mode, final PullToRefreshBase.Orientation scrollDirection, TypedArray attrs) { super(context, mode, scrollDirection, attrs); final int rotateAngle = mode == PullToRefreshBase.Mode.PULL_FROM_START ? -180 : 180; mRotateAnimation = new RotateAnimation(0, rotateAngle, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); mRotateAnimation.setInterpolator(ANIMATION_INTERPOLATOR); mRotateAnimation.setDuration(FLIP_ANIMATION_DURATION); mRotateAnimation.setFillAfter(true); mResetRotateAnimation = new RotateAnimation(rotateAngle, 0, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); mResetRotateAnimation.setInterpolator(ANIMATION_INTERPOLATOR); mResetRotateAnimation.setDuration(FLIP_ANIMATION_DURATION); mResetRotateAnimation.setFillAfter(true); } @Override protected void onLoadingDrawableSet(Drawable imageDrawable) { if (null != imageDrawable) { final int dHeight = imageDrawable.getIntrinsicHeight(); final int dWidth = imageDrawable.getIntrinsicWidth(); /** * We need to set the width/height of the ImageView so that it is * square with each side the size of the largest drawable dimension. * This is so that it doesn't clip when rotated. */ ViewGroup.LayoutParams lp = mHeaderImage.getLayoutParams(); lp.width = lp.height = Math.max(dHeight, dWidth); mHeaderImage.requestLayout(); /** * We now rotate the Drawable so that is at the correct rotation, * and is centered. */ mHeaderImage.setScaleType(ScaleType.MATRIX); Matrix matrix = new Matrix(); matrix.postTranslate((lp.width - dWidth) / 2f, (lp.height - dHeight) / 2f); matrix.postRotate(getDrawableRotationAngle(), lp.width / 2f, lp.height / 2f); mHeaderImage.setImageMatrix(matrix); } } @Override protected void onPullImpl(float scaleOfLayout) { // NO-OP } @Override protected void pullToRefreshImpl() { // Only start reset Animation, we've previously show the rotate anim if (mRotateAnimation == mHeaderImage.getAnimation()) { mHeaderImage.startAnimation(mResetRotateAnimation); } } @Override protected void refreshingImpl() { mHeaderImage.clearAnimation(); mHeaderImage.setVisibility(View.INVISIBLE); mHeaderProgress.setVisibility(View.GONE); } @Override protected void releaseToRefreshImpl() { mHeaderImage.startAnimation(mRotateAnimation); } @Override protected void resetImpl() { mHeaderImage.clearAnimation(); mHeaderProgress.setVisibility(View.GONE); mHeaderImage.setVisibility(View.VISIBLE); } @Override protected int getDefaultDrawableResId() { return DRAWING_CACHE_QUALITY_AUTO ; //R.drawable.default_ptr_flip; } private float getDrawableRotationAngle() { float angle = 0f; switch (mMode) { case PULL_FROM_END: if (mScrollDirection == PullToRefreshBase.Orientation.HORIZONTAL) { angle = 90f; } else { angle = 180f; } break; case PULL_FROM_START: if (mScrollDirection == PullToRefreshBase.Orientation.HORIZONTAL) { angle = 270f; } break; default: break; } return angle; } }