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/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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.android.launcher3.folder;
import static android.view.View.ALPHA;
import static com.android.launcher3.BubbleTextView.TEXT_ALPHA_PROPERTY;
import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
import static com.android.launcher3.folder.ClippedFolderIconLayoutRule.MAX_NUM_ITEMS_IN_PREVIEW;
import static com.android.launcher3.graphics.IconShape.getShape;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.animation.TimeInterpolator;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Rect;
import android.graphics.drawable.GradientDrawable;
import android.util.Property;
import android.view.View;
import android.view.animation.AnimationUtils;
import com.android.launcher3.BubbleTextView;
import com.android.launcher3.CellLayout;
import com.android.launcher3.DeviceProfile;
import com.android.launcher3.R;
import com.android.launcher3.ShortcutAndWidgetContainer;
import com.android.launcher3.Utilities;
import com.android.launcher3.anim.PropertyResetListener;
import com.android.launcher3.celllayout.CellLayoutLayoutParams;
import com.android.launcher3.util.Themes;
import com.android.launcher3.views.BaseDragLayer;
import java.util.List;
/**
* Manages the opening and closing animations for a {@link Folder}.
*
* All of the animations are done in the Folder.
* ie. When the user taps on the FolderIcon, we immediately hide the FolderIcon and show the Folder
* in its place before starting the animation.
*/
public class FolderAnimationManager {
private static final int FOLDER_NAME_ALPHA_DURATION = 32;
private static final int LARGE_FOLDER_FOOTER_DURATION = 128;
private Folder mFolder;
private FolderPagedView mContent;
private GradientDrawable mFolderBackground;
private FolderIcon mFolderIcon;
private PreviewBackground mPreviewBackground;
private Context mContext;
private final boolean mIsOpening;
private final int mDuration;
private final int mDelay;
private final TimeInterpolator mFolderInterpolator;
private final TimeInterpolator mLargeFolderPreviewItemOpenInterpolator;
private final TimeInterpolator mLargeFolderPreviewItemCloseInterpolator;
private final PreviewItemDrawingParams mTmpParams = new PreviewItemDrawingParams(0, 0, 0);
private final FolderGridOrganizer mPreviewVerifier;
private ObjectAnimator mBgColorAnimator;
private DeviceProfile mDeviceProfile;
public FolderAnimationManager(Folder folder, boolean isOpening) {
mFolder = folder;
mContent = folder.mContent;
mFolderBackground = (GradientDrawable) mFolder.getBackground();
mFolderIcon = folder.mFolderIcon;
mPreviewBackground = mFolderIcon.mBackground;
mContext = folder.getContext();
mDeviceProfile = folder.mActivityContext.getDeviceProfile();
mPreviewVerifier = new FolderGridOrganizer(mDeviceProfile.inv);
mIsOpening = isOpening;
Resources res = mContent.getResources();
mDuration = res.getInteger(R.integer.config_materialFolderExpandDuration);
mDelay = res.getInteger(R.integer.config_folderDelay);
mFolderInterpolator = AnimationUtils.loadInterpolator(mContext,
R.interpolator.folder_interpolator);
mLargeFolderPreviewItemOpenInterpolator = AnimationUtils.loadInterpolator(mContext,
R.interpolator.large_folder_preview_item_open_interpolator);
mLargeFolderPreviewItemCloseInterpolator = AnimationUtils.loadInterpolator(mContext,
R.interpolator.large_folder_preview_item_close_interpolator);
}
/**
* Returns the animator that changes the background color.
*/
public ObjectAnimator getBgColorAnimator() {
return mBgColorAnimator;
}
/**
* Prepares the Folder for animating between open / closed states.
*/
public AnimatorSet getAnimator() {
final BaseDragLayer.LayoutParams lp =
(BaseDragLayer.LayoutParams) mFolder.getLayoutParams();
mFolderIcon.getPreviewItemManager().recomputePreviewDrawingParams();
ClippedFolderIconLayoutRule rule = mFolderIcon.getLayoutRule();
final List<BubbleTextView> itemsInPreview = getPreviewIconsOnPage(0);
// Match position of the FolderIcon
final Rect folderIconPos = new Rect();
float scaleRelativeToDragLayer = mFolder.mActivityContext.getDragLayer()
.getDescendantRectRelativeToSelf(mFolderIcon, folderIconPos);
int scaledRadius = mPreviewBackground.getScaledRadius();
float initialSize = (scaledRadius * 2) * scaleRelativeToDragLayer;
// Match size/scale of icons in the preview
float previewScale = rule.scaleForItem(itemsInPreview.size());
float previewSize = rule.getIconSize() * previewScale;
float initialScale = previewSize / itemsInPreview.get(0).getIconSize()
* scaleRelativeToDragLayer;
final float finalScale = 1f;
float scale = mIsOpening ? initialScale : finalScale;
mFolder.setPivotX(0);
mFolder.setPivotY(0);
// Scale the contents of the folder.
mFolder.mContent.setScaleX(scale);
mFolder.mContent.setScaleY(scale);
mFolder.mContent.setPivotX(0);
mFolder.mContent.setPivotY(0);
mFolder.mFooter.setScaleX(scale);
mFolder.mFooter.setScaleY(scale);
mFolder.mFooter.setPivotX(0);
mFolder.mFooter.setPivotY(0);
// We want to create a small X offset for the preview items, so that they follow their
// expected path to their final locations. ie. an icon should not move right, if it's final
// location is to its left. This value is arbitrarily defined.
int previewItemOffsetX = (int) (previewSize / 2);
if (Utilities.isRtl(mContext.getResources())) {
previewItemOffsetX = (int) (lp.width * initialScale - initialSize - previewItemOffsetX);
}
final int paddingOffsetX = (int) (mContent.getPaddingLeft() * initialScale);
final int paddingOffsetY = (int) (mContent.getPaddingTop() * initialScale);
int initialX = folderIconPos.left + mFolder.getPaddingLeft()
+ Math.round(mPreviewBackground.getOffsetX() * scaleRelativeToDragLayer)
- paddingOffsetX - previewItemOffsetX;
int initialY = folderIconPos.top + mFolder.getPaddingTop()
+ Math.round(mPreviewBackground.getOffsetY() * scaleRelativeToDragLayer)
- paddingOffsetY;
final float xDistance = initialX - lp.x;
final float yDistance = initialY - lp.y;
// Set up the Folder background.
final int initialColor = Themes.getAttrColor(mContext, R.attr.folderPreviewColor);
final int finalColor = Themes.getAttrColor(mContext, R.attr.folderBackgroundColor);
mFolderBackground.mutate();
mFolderBackground.setColor(mIsOpening ? initialColor : finalColor);
// Set up the reveal animation that clips the Folder.
int totalOffsetX = paddingOffsetX + previewItemOffsetX;
Rect startRect = new Rect(totalOffsetX,
paddingOffsetY,
Math.round((totalOffsetX + initialSize)),
Math.round((paddingOffsetY + initialSize)));
Rect endRect = new Rect(0, 0, lp.width, lp.height);
float finalRadius = mFolderBackground.getCornerRadius();
// Create the animators.
AnimatorSet a = new AnimatorSet();
// Initialize the Folder items' text.
PropertyResetListener colorResetListener =
new PropertyResetListener<>(TEXT_ALPHA_PROPERTY, 1f);
for (BubbleTextView icon : mFolder.getItemsOnPage(mFolder.mContent.getCurrentPage())) {
if (mIsOpening) {
icon.setTextVisibility(false);
}
ObjectAnimator anim = icon.createTextAlphaAnimator(mIsOpening);
anim.addListener(colorResetListener);
play(a, anim);
}
mBgColorAnimator = getAnimator(mFolderBackground, "color", initialColor, finalColor);
play(a, mBgColorAnimator);
play(a, getAnimator(mFolder, View.TRANSLATION_X, xDistance, 0f));
play(a, getAnimator(mFolder, View.TRANSLATION_Y, yDistance, 0f));
play(a, getAnimator(mFolder.mContent, SCALE_PROPERTY, initialScale, finalScale));
play(a, getAnimator(mFolder.mFooter, SCALE_PROPERTY, initialScale, finalScale));
final int footerAlphaDuration;
final int footerStartDelay;
if (isLargeFolder()) {
if (mIsOpening) {
mFolder.mFooter.setAlpha(0);
footerAlphaDuration = LARGE_FOLDER_FOOTER_DURATION;
footerStartDelay = mDuration - footerAlphaDuration;
} else {
footerAlphaDuration = 0;
footerStartDelay = 0;
}
} else {
footerStartDelay = 0;
footerAlphaDuration = mDuration;
}
play(a, getAnimator(mFolder.mFooter, ALPHA, 0, 1f), footerStartDelay, footerAlphaDuration);
// Create reveal animator for the folder background
play(a, getShape().createRevealAnimator(
mFolder, startRect, endRect, finalRadius, !mIsOpening));
// Create reveal animator for the folder content (capture the top 4 icons 2x2)
int width = mDeviceProfile.folderCellLayoutBorderSpacePx
+ mDeviceProfile.folderCellWidthPx * 2;
int height = mDeviceProfile.folderCellLayoutBorderSpacePx
+ mDeviceProfile.folderCellHeightPx * 2;
int page = mIsOpening ? mContent.getCurrentPage() : mContent.getDestinationPage();
int left = mContent.getPaddingLeft() + page * lp.width;
Rect contentStart = new Rect(left, 0, left + width, height);
Rect contentEnd = new Rect(left, 0, left + lp.width, lp.height);
play(a, getShape().createRevealAnimator(
mFolder.getContent(), contentStart, contentEnd, finalRadius, !mIsOpening));
// Fade in the folder name, as the text can overlap the icons when grid size is small.
mFolder.mFolderName.setAlpha(mIsOpening ? 0f : 1f);
play(a, getAnimator(mFolder.mFolderName, View.ALPHA, 0, 1),
mIsOpening ? FOLDER_NAME_ALPHA_DURATION : 0,
mIsOpening ? mDuration - FOLDER_NAME_ALPHA_DURATION : FOLDER_NAME_ALPHA_DURATION);
// Translate the footer so that it tracks the bottom of the content.
float normalHeight = mFolder.getContentAreaHeight();
float scaledHeight = normalHeight * initialScale;
float diff = normalHeight - scaledHeight;
play(a, getAnimator(mFolder.mFooter, View.TRANSLATION_Y, -diff, 0f));
// Animate the elevation midway so that the shadow is not noticeable in the background.
int midDuration = mDuration / 2;
Animator z = getAnimator(mFolder, View.TRANSLATION_Z, -mFolder.getElevation(), 0);
play(a, z, mIsOpening ? midDuration : 0, midDuration);
// Store clip variables
CellLayout cellLayout = mContent.getCurrentCellLayout();
boolean folderClipChildren = mFolder.getClipChildren();
boolean folderClipToPadding = mFolder.getClipToPadding();
boolean contentClipChildren = mContent.getClipChildren();
boolean contentClipToPadding = mContent.getClipToPadding();
boolean cellLayoutClipChildren = cellLayout.getClipChildren();
boolean cellLayoutClipPadding = cellLayout.getClipToPadding();
mFolder.setClipChildren(false);
mFolder.setClipToPadding(false);
mContent.setClipChildren(false);
mContent.setClipToPadding(false);
cellLayout.setClipChildren(false);
cellLayout.setClipToPadding(false);
a.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
mFolder.setTranslationX(0.0f);
mFolder.setTranslationY(0.0f);
mFolder.setTranslationZ(0.0f);
mFolder.mContent.setScaleX(1f);
mFolder.mContent.setScaleY(1f);
mFolder.mFooter.setScaleX(1f);
mFolder.mFooter.setScaleY(1f);
mFolder.mFooter.setTranslationX(0f);
mFolder.mFolderName.setAlpha(1f);
mFolder.setClipChildren(folderClipChildren);
mFolder.setClipToPadding(folderClipToPadding);
mContent.setClipChildren(contentClipChildren);
mContent.setClipToPadding(contentClipToPadding);
cellLayout.setClipChildren(cellLayoutClipChildren);
cellLayout.setClipToPadding(cellLayoutClipPadding);
}
});
// We set the interpolator on all current child animators here, because the preview item
// animators may use a different interpolator.
for (Animator animator : a.getChildAnimations()) {
animator.setInterpolator(mFolderInterpolator);
}
int radiusDiff = scaledRadius - mPreviewBackground.getRadius();
addPreviewItemAnimators(a, initialScale / scaleRelativeToDragLayer,
// Background can have a scaled radius in drag and drop mode, so we need to add the
// difference to keep the preview items centered.
(int) (previewItemOffsetX / scaleRelativeToDragLayer) + radiusDiff, radiusDiff);
return a;
}
/**
* Returns the list of "preview items" on {@param page}.
*/
private List<BubbleTextView> getPreviewIconsOnPage(int page) {
return mPreviewVerifier.setFolderInfo(mFolder.mInfo)
.previewItemsForPage(page, mFolder.getIconsInReadingOrder());
}
/**
* Animate the items on the current page.
*/
private void addPreviewItemAnimators(AnimatorSet animatorSet, final float folderScale,
int previewItemOffsetX, int previewItemOffsetY) {
ClippedFolderIconLayoutRule rule = mFolderIcon.getLayoutRule();
boolean isOnFirstPage = mFolder.mContent.getCurrentPage() == 0;
final List<BubbleTextView> itemsInPreview = getPreviewIconsOnPage(
isOnFirstPage ? 0 : mFolder.mContent.getCurrentPage());
final int numItemsInPreview = itemsInPreview.size();
final int numItemsInFirstPagePreview = isOnFirstPage
? numItemsInPreview : MAX_NUM_ITEMS_IN_PREVIEW;
TimeInterpolator previewItemInterpolator = getPreviewItemInterpolator();
ShortcutAndWidgetContainer cwc = mContent.getPageAt(0).getShortcutsAndWidgets();
for (int i = 0; i < numItemsInPreview; ++i) {
final BubbleTextView btv = itemsInPreview.get(i);
CellLayoutLayoutParams btvLp = (CellLayoutLayoutParams) btv.getLayoutParams();
// Calculate the final values in the LayoutParams.
btvLp.isLockedToGrid = true;
cwc.setupLp(btv);
// Match scale of icons in the preview of the items on the first page.
float previewScale = rule.scaleForItem(numItemsInFirstPagePreview);
float previewSize = rule.getIconSize() * previewScale;
float iconScale = previewSize / itemsInPreview.get(i).getIconSize();
final float initialScale = iconScale / folderScale;
final float finalScale = 1f;
float scale = mIsOpening ? initialScale : finalScale;
btv.setScaleX(scale);
btv.setScaleY(scale);
// Match positions of the icons in the folder with their positions in the preview
rule.computePreviewItemDrawingParams(i, numItemsInFirstPagePreview, mTmpParams);
// The PreviewLayoutRule assumes that the icon size takes up the entire width so we
// offset by the actual size.
int iconOffsetX = (int) ((btvLp.width - btv.getIconSize()) * iconScale) / 2;
final int previewPosX =
(int) ((mTmpParams.transX - iconOffsetX + previewItemOffsetX) / folderScale);
final float paddingTop = btv.getPaddingTop() * iconScale;
final int previewPosY = (int) ((mTmpParams.transY + previewItemOffsetY - paddingTop)
/ folderScale);
final float xDistance = previewPosX - btvLp.x;
final float yDistance = previewPosY - btvLp.y;
Animator translationX = getAnimator(btv, View.TRANSLATION_X, xDistance, 0f);
translationX.setInterpolator(previewItemInterpolator);
play(animatorSet, translationX);
Animator translationY = getAnimator(btv, View.TRANSLATION_Y, yDistance, 0f);
translationY.setInterpolator(previewItemInterpolator);
play(animatorSet, translationY);
Animator scaleAnimator = getAnimator(btv, SCALE_PROPERTY, initialScale, finalScale);
scaleAnimator.setInterpolator(previewItemInterpolator);
play(animatorSet, scaleAnimator);
if (mFolder.getItemCount() > MAX_NUM_ITEMS_IN_PREVIEW) {
// These delays allows the preview items to move as part of the Folder's motion,
// and its only necessary for large folders because of differing interpolators.
int delay = mIsOpening ? mDelay : mDelay * 2;
if (mIsOpening) {
translationX.setStartDelay(delay);
translationY.setStartDelay(delay);
scaleAnimator.setStartDelay(delay);
}
translationX.setDuration(translationX.getDuration() - delay);
translationY.setDuration(translationY.getDuration() - delay);
scaleAnimator.setDuration(scaleAnimator.getDuration() - delay);
}
animatorSet.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(Animator animation) {
super.onAnimationStart(animation);
// Necessary to initialize values here because of the start delay.
if (mIsOpening) {
btv.setTranslationX(xDistance);
btv.setTranslationY(yDistance);
btv.setScaleX(initialScale);
btv.setScaleY(initialScale);
}
}
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
btv.setTranslationX(0.0f);
btv.setTranslationY(0.0f);
btv.setScaleX(1f);
btv.setScaleY(1f);
}
});
}
}
private void play(AnimatorSet as, Animator a) {
play(as, a, a.getStartDelay(), mDuration);
}
private void play(AnimatorSet as, Animator a, long startDelay, int duration) {
a.setStartDelay(startDelay);
a.setDuration(duration);
as.play(a);
}
private boolean isLargeFolder() {
return mFolder.getItemCount() > MAX_NUM_ITEMS_IN_PREVIEW;
}
private TimeInterpolator getPreviewItemInterpolator() {
if (isLargeFolder()) {
// With larger folders, we want the preview items to reach their final positions faster
// (when opening) and later (when closing) so that they appear aligned with the rest of
// the folder items when they are both visible.
return mIsOpening
? mLargeFolderPreviewItemOpenInterpolator
: mLargeFolderPreviewItemCloseInterpolator;
}
return mFolderInterpolator;
}
private Animator getAnimator(View view, Property property, float v1, float v2) {
return mIsOpening
? ObjectAnimator.ofFloat(view, property, v1, v2)
: ObjectAnimator.ofFloat(view, property, v2, v1);
}
private ObjectAnimator getAnimator(GradientDrawable drawable, String property, int v1, int v2) {
return mIsOpening
? ObjectAnimator.ofArgb(drawable, property, v1, v2)
: ObjectAnimator.ofArgb(drawable, property, v2, v1);
}
}