1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.launcher3.taskbar; 17 18 import static com.android.launcher3.Utilities.dpToPx; 19 import static com.android.launcher3.Utilities.dpiFromPx; 20 21 import android.content.res.Resources; 22 import android.util.DisplayMetrics; 23 24 import androidx.core.content.res.ResourcesCompat; 25 26 import com.android.launcher3.DeviceProfile; 27 import com.android.launcher3.R; 28 29 /** 30 * Utility class that contains the different taskbar thresholds logic. 31 */ 32 public class TaskbarThresholdUtils { 33 34 // We divide the screen into this many parts, and use the result to scale the thresholds to 35 // any size device. Note that this value was calculated arbitrarily by using two tablet devices 36 // as data points. 37 private static final float SCREEN_UNITS = 1 / 80f; 38 getThreshold(Resources r, DeviceProfile dp, int thresholdDimen, int multiplierDimen)39 private static int getThreshold(Resources r, DeviceProfile dp, int thresholdDimen, 40 int multiplierDimen) { 41 float landscapeScreenHeight = dp.isLandscape ? dp.heightPx : dp.widthPx; 42 float screenPart = (landscapeScreenHeight * SCREEN_UNITS); 43 float defaultDp = dpiFromPx(screenPart, DisplayMetrics.DENSITY_DEVICE_STABLE); 44 float thisDp = dpToPx(defaultDp); 45 float multiplier = ResourcesCompat.getFloat(r, multiplierDimen); 46 float value = (thisDp) * multiplier; 47 48 return Math.round(value); 49 } 50 51 /** 52 * Returns the threshold that determines if we should show taskbar. 53 */ getFromNavThreshold(Resources r, DeviceProfile dp)54 public static int getFromNavThreshold(Resources r, DeviceProfile dp) { 55 return getThreshold(r, dp, R.dimen.taskbar_from_nav_threshold, 56 R.dimen.taskbar_nav_threshold_mult); 57 } 58 59 /** 60 * Returns the threshold that we start moving the app window. 61 */ getAppWindowThreshold(Resources r, DeviceProfile dp)62 public static int getAppWindowThreshold(Resources r, DeviceProfile dp) { 63 return getThreshold(r, dp, R.dimen.taskbar_app_window_threshold, 64 R.dimen.taskbar_app_window_threshold_mult); 65 } 66 67 /** 68 * Returns the threshold for whether we land in home or overview. 69 */ getHomeOverviewThreshold(Resources r, DeviceProfile dp)70 public static int getHomeOverviewThreshold(Resources r, DeviceProfile dp) { 71 return getThreshold(r, dp, R.dimen.taskbar_home_overview_threshold, 72 R.dimen.taskbar_home_overview_threshold_mult); 73 } 74 75 /** 76 * Returns the threshold that we use to allow swipe to catch up to finger. 77 */ getCatchUpThreshold(Resources r, DeviceProfile dp)78 public static int getCatchUpThreshold(Resources r, DeviceProfile dp) { 79 return getThreshold(r, dp, R.dimen.taskbar_catch_up_threshold, 80 R.dimen.taskbar_catch_up_threshold_mult); 81 } 82 } 83