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