Tony Wickham
1743ac4691
Maybe we should write a script that checks that this is present in all our files? I didn't do a thorough check, but wouldn't be surprised if others were missing. Change-Id: I4777ff618f952b9b11fde60ebc8d897cf6449032
94 lines
3.5 KiB
Java
94 lines
3.5 KiB
Java
/*
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* Copyright (C) 2016 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;
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/**
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* Keeps track of when thresholds are passed during a pinch gesture,
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* used to inform {@link PinchAnimationManager} throughout.
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*
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* @see PinchToOverviewListener
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* @see PinchAnimationManager
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*/
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public class PinchThresholdManager {
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public static final float THRESHOLD_ZERO = 0.0f;
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public static final float THRESHOLD_ONE = 0.40f;
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public static final float THRESHOLD_TWO = 0.70f;
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public static final float THRESHOLD_THREE = 0.95f;
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private Workspace mWorkspace;
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private float mPassedThreshold = THRESHOLD_ZERO;
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public PinchThresholdManager(Workspace workspace) {
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mWorkspace = workspace;
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}
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/**
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* Uses the pinch progress to determine whether a threshold has been passed,
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* and asks the {@param animationManager} to animate if so.
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* @param progress From 0 to 1, where 0 is overview and 1 is workspace.
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* @param animationManager Animates the threshold change if one is passed.
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* @return The last passed threshold, one of
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* {@link PinchThresholdManager#THRESHOLD_ZERO},
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* {@link PinchThresholdManager#THRESHOLD_ONE},
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* {@link PinchThresholdManager#THRESHOLD_TWO}, or
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* {@link PinchThresholdManager#THRESHOLD_THREE}
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*/
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public float updateAndAnimatePassedThreshold(float progress,
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PinchAnimationManager animationManager) {
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if (!mWorkspace.isInOverviewMode()) {
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// Invert the progress, because going from workspace to overview is 1 to 0.
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progress = 1f - progress;
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}
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float previousPassedThreshold = mPassedThreshold;
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if (progress < THRESHOLD_ONE) {
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mPassedThreshold = THRESHOLD_ZERO;
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} else if (progress < THRESHOLD_TWO) {
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mPassedThreshold = THRESHOLD_ONE;
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} else if (progress < THRESHOLD_THREE) {
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mPassedThreshold = THRESHOLD_TWO;
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} else {
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mPassedThreshold = THRESHOLD_THREE;
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}
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if (mPassedThreshold != previousPassedThreshold) {
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Workspace.State fromState = mWorkspace.isInOverviewMode() ? Workspace.State.OVERVIEW
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: Workspace.State.NORMAL;
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Workspace.State toState = mWorkspace.isInOverviewMode() ? Workspace.State.NORMAL
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: Workspace.State.OVERVIEW;
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float thresholdToAnimate = mPassedThreshold;
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if (mPassedThreshold < previousPassedThreshold) {
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// User reversed pinch, so heading back to the state that they started from.
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toState = fromState;
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thresholdToAnimate = previousPassedThreshold;
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}
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animationManager.animateThreshold(thresholdToAnimate, fromState, toState);
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}
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return mPassedThreshold;
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}
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public float getPassedThreshold() {
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return mPassedThreshold;
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}
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public void reset() {
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mPassedThreshold = THRESHOLD_ZERO;
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}
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}
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