Tony Wickham
81feb2c547
The scrim exists primarily to protect nav bar buttons which don't exist in this mode. Change-Id: Ic6de7d54f27f135eecb116ac09714c91c05b88da
298 lines
11 KiB
Java
298 lines
11 KiB
Java
/*
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* Copyright (C) 2018 The Android Open Source Project
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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.android.launcher3.graphics;
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import static android.content.Intent.ACTION_SCREEN_OFF;
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import static android.content.Intent.ACTION_USER_PRESENT;
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import static com.android.launcher3.config.FeatureFlags.KEYGUARD_ANIMATION;
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import static com.android.launcher3.icons.GraphicsUtils.setColorAlphaBound;
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import android.animation.ObjectAnimator;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.LinearGradient;
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import android.graphics.Paint;
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import android.graphics.Rect;
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import android.graphics.RectF;
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import android.graphics.Region;
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import android.graphics.Shader;
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import android.graphics.drawable.Drawable;
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import android.util.DisplayMetrics;
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import android.util.FloatProperty;
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import android.view.View;
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import android.view.WindowInsets;
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import androidx.core.graphics.ColorUtils;
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import com.android.launcher3.CellLayout;
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import com.android.launcher3.R;
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import com.android.launcher3.ResourceUtils;
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import com.android.launcher3.Utilities;
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import com.android.launcher3.Workspace;
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import com.android.launcher3.uioverrides.WallpaperColorInfo;
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import com.android.launcher3.util.Themes;
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/**
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* View scrim which draws behind hotseat and workspace
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*/
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public class WorkspaceAndHotseatScrim extends Scrim {
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public static final FloatProperty<WorkspaceAndHotseatScrim> SYSUI_PROGRESS =
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new FloatProperty<WorkspaceAndHotseatScrim>("sysUiProgress") {
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@Override
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public Float get(WorkspaceAndHotseatScrim scrim) {
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return scrim.mSysUiProgress;
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}
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@Override
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public void setValue(WorkspaceAndHotseatScrim scrim, float value) {
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scrim.setSysUiProgress(value);
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}
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};
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private static final FloatProperty<WorkspaceAndHotseatScrim> SYSUI_ANIM_MULTIPLIER =
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new FloatProperty<WorkspaceAndHotseatScrim>("sysUiAnimMultiplier") {
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@Override
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public Float get(WorkspaceAndHotseatScrim scrim) {
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return scrim.mSysUiAnimMultiplier;
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}
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@Override
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public void setValue(WorkspaceAndHotseatScrim scrim, float value) {
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scrim.mSysUiAnimMultiplier = value;
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scrim.reapplySysUiAlpha();
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}
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};
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/**
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* Receiver used to get a signal that the user unlocked their device.
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* @see KEYGUARD_ANIMATION For proper signal.
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*/
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private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
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@Override
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public void onReceive(Context context, Intent intent) {
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final String action = intent.getAction();
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if (ACTION_SCREEN_OFF.equals(action)) {
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mAnimateScrimOnNextDraw = true;
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} else if (ACTION_USER_PRESENT.equals(action)) {
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// ACTION_USER_PRESENT is sent after onStart/onResume. This covers the case where
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// the user unlocked and the Launcher is not in the foreground.
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mAnimateScrimOnNextDraw = false;
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}
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}
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};
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private static final int DARK_SCRIM_COLOR = 0x55000000;
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private static final int MAX_HOTSEAT_SCRIM_ALPHA = 100;
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private static final int ALPHA_MASK_HEIGHT_DP = 500;
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private static final int ALPHA_MASK_BITMAP_DP = 200;
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private static final int ALPHA_MASK_WIDTH_DP = 2;
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private final Rect mHighlightRect = new Rect();
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private Workspace mWorkspace;
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private boolean mDrawTopScrim, mDrawBottomScrim;
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private final RectF mFinalMaskRect = new RectF();
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private final Paint mBottomMaskPaint = new Paint(Paint.FILTER_BITMAP_FLAG);
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private final Bitmap mBottomMask;
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private final int mMaskHeight;
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private final Drawable mTopScrim;
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private float mSysUiProgress = 1;
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private boolean mHideSysUiScrim;
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private boolean mAnimateScrimOnNextDraw = false;
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private float mSysUiAnimMultiplier = 1;
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public WorkspaceAndHotseatScrim(View view) {
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super(view);
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mMaskHeight = ResourceUtils.pxFromDp(ALPHA_MASK_BITMAP_DP,
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view.getResources().getDisplayMetrics());
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mTopScrim = Themes.getAttrDrawable(view.getContext(), R.attr.workspaceStatusBarScrim);
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mBottomMask = mTopScrim == null ? null : createDitheredAlphaMask();
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mHideSysUiScrim = mTopScrim == null;
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onExtractedColorsChanged(mWallpaperColorInfo);
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}
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public void setWorkspace(Workspace workspace) {
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mWorkspace = workspace;
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}
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public void draw(Canvas canvas) {
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// Draw the background below children.
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if (mScrimAlpha > 0) {
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// Update the scroll position first to ensure scrim cutout is in the right place.
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mWorkspace.computeScrollWithoutInvalidation();
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CellLayout currCellLayout = mWorkspace.getCurrentDragOverlappingLayout();
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canvas.save();
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if (currCellLayout != null && currCellLayout != mLauncher.getHotseat()) {
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// Cut a hole in the darkening scrim on the page that should be highlighted, if any.
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mLauncher.getDragLayer()
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.getDescendantRectRelativeToSelf(currCellLayout, mHighlightRect);
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canvas.clipRect(mHighlightRect, Region.Op.DIFFERENCE);
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}
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super.draw(canvas);
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canvas.restore();
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}
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if (!mHideSysUiScrim) {
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if (mSysUiProgress <= 0) {
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mAnimateScrimOnNextDraw = false;
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return;
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}
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if (mAnimateScrimOnNextDraw) {
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mSysUiAnimMultiplier = 0;
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reapplySysUiAlphaNoInvalidate();
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ObjectAnimator oa = createSysuiMultiplierAnim(1);
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oa.setDuration(600);
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oa.setStartDelay(mLauncher.getWindow().getTransitionBackgroundFadeDuration());
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oa.start();
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mAnimateScrimOnNextDraw = false;
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}
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if (mDrawTopScrim) {
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mTopScrim.draw(canvas);
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}
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if (mDrawBottomScrim) {
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canvas.drawBitmap(mBottomMask, null, mFinalMaskRect, mBottomMaskPaint);
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}
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}
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}
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/**
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* @return an ObjectAnimator that controls the fade in/out of the sys ui scrim.
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*/
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public ObjectAnimator createSysuiMultiplierAnim(float... values) {
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ObjectAnimator anim = ObjectAnimator.ofFloat(this, SYSUI_ANIM_MULTIPLIER, values);
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anim.setAutoCancel(true);
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return anim;
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}
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/**
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* Determines whether to draw the top and/or bottom scrim based on new insets.
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*/
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public void onInsetsChanged(Rect insets, boolean allowSysuiScrims) {
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mDrawTopScrim = allowSysuiScrims
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&& mTopScrim != null
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&& insets.top > 0;
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mDrawBottomScrim = allowSysuiScrims
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&& mBottomMask != null
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&& !mLauncher.getDeviceProfile().isVerticalBarLayout()
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&& hasBottomNavButtons();
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}
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private boolean hasBottomNavButtons() {
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if (Utilities.ATLEAST_Q && mLauncher.getRootView() != null
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&& mLauncher.getRootView().getRootWindowInsets() != null) {
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WindowInsets windowInsets = mLauncher.getRootView().getRootWindowInsets();
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return windowInsets.getTappableElementInsets().bottom > 0;
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}
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return true;
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}
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@Override
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public void onViewAttachedToWindow(View view) {
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super.onViewAttachedToWindow(view);
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if (!KEYGUARD_ANIMATION.get() && mTopScrim != null) {
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IntentFilter filter = new IntentFilter(ACTION_SCREEN_OFF);
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filter.addAction(ACTION_USER_PRESENT); // When the device wakes up + keyguard is gone
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mRoot.getContext().registerReceiver(mReceiver, filter);
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}
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}
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@Override
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public void onViewDetachedFromWindow(View view) {
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super.onViewDetachedFromWindow(view);
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if (!KEYGUARD_ANIMATION.get() && mTopScrim != null) {
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mRoot.getContext().unregisterReceiver(mReceiver);
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}
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}
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@Override
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public void onExtractedColorsChanged(WallpaperColorInfo wallpaperColorInfo) {
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// for super light wallpaper it needs to be darken for contrast to workspace
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// for dark wallpapers the text is white so darkening works as well
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mBottomMaskPaint.setColor(ColorUtils.compositeColors(DARK_SCRIM_COLOR,
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wallpaperColorInfo.getMainColor()));
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reapplySysUiAlpha();
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super.onExtractedColorsChanged(wallpaperColorInfo);
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}
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public void setSize(int w, int h) {
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if (mTopScrim != null) {
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mTopScrim.setBounds(0, 0, w, h);
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mFinalMaskRect.set(0, h - mMaskHeight, w, h);
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}
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}
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private void setSysUiProgress(float progress) {
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if (progress != mSysUiProgress) {
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mSysUiProgress = progress;
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reapplySysUiAlpha();
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}
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}
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private void reapplySysUiAlpha() {
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reapplySysUiAlphaNoInvalidate();
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if (!mHideSysUiScrim) {
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invalidate();
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}
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}
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private void reapplySysUiAlphaNoInvalidate() {
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float factor = mSysUiProgress * mSysUiAnimMultiplier;
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mBottomMaskPaint.setAlpha(Math.round(MAX_HOTSEAT_SCRIM_ALPHA * factor));
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if (mTopScrim != null) {
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mTopScrim.setAlpha(Math.round(255 * factor));
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}
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}
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private Bitmap createDitheredAlphaMask() {
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DisplayMetrics dm = mLauncher.getResources().getDisplayMetrics();
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int width = ResourceUtils.pxFromDp(ALPHA_MASK_WIDTH_DP, dm);
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int gradientHeight = ResourceUtils.pxFromDp(ALPHA_MASK_HEIGHT_DP, dm);
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Bitmap dst = Bitmap.createBitmap(width, mMaskHeight, Bitmap.Config.ALPHA_8);
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Canvas c = new Canvas(dst);
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Paint paint = new Paint(Paint.DITHER_FLAG);
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LinearGradient lg = new LinearGradient(0, 0, 0, gradientHeight,
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new int[]{
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0x00FFFFFF,
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setColorAlphaBound(Color.WHITE, (int) (0xFF * 0.95)),
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0xFFFFFFFF},
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new float[]{0f, 0.8f, 1f},
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Shader.TileMode.CLAMP);
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paint.setShader(lg);
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c.drawRect(0, 0, width, gradientHeight, paint);
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return dst;
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}
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}
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