/*
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* Copyright (C) 2012 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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import android.graphics.drawable.Drawable;
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import android.util.FloatProperty;
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import android.util.Property;
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import android.view.View;
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import android.view.ViewGroup.LayoutParams;
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public class LauncherAnimUtils {
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/**
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* Durations for various state animations. These are not defined in resources to allow
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* easier access from static classes and enums
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*/
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public static final int ALL_APPS_TRANSITION_MS = 320;
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public static final int OVERVIEW_TRANSITION_MS = 250;
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public static final int SPRING_LOADED_TRANSITION_MS = 150;
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public static final int SPRING_LOADED_EXIT_DELAY = 500;
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// The progress of an animation to all apps must be at least this far along to snap to all apps.
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public static final float MIN_PROGRESS_TO_ALL_APPS = 0.5f;
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public static final Property<Drawable, Integer> DRAWABLE_ALPHA =
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new Property<Drawable, Integer>(Integer.TYPE, "drawableAlpha") {
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@Override
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public Integer get(Drawable drawable) {
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return drawable.getAlpha();
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}
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@Override
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public void set(Drawable drawable, Integer alpha) {
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drawable.setAlpha(alpha);
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}
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};
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public static final FloatProperty<View> SCALE_PROPERTY =
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new FloatProperty<View>("scale") {
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@Override
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public Float get(View view) {
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return view.getScaleX();
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}
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@Override
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public void setValue(View view, float scale) {
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view.setScaleX(scale);
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view.setScaleY(scale);
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}
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};
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/** Increase the duration if we prevented the fling, as we are going against a high velocity. */
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public static int blockedFlingDurationFactor(float velocity) {
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return (int) Utilities.boundToRange(Math.abs(velocity) / 2, 2f, 6f);
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}
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public static final Property<LayoutParams, Integer> LAYOUT_WIDTH =
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new Property<LayoutParams, Integer>(Integer.TYPE, "width") {
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@Override
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public Integer get(LayoutParams lp) {
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return lp.width;
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}
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@Override
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public void set(LayoutParams lp, Integer width) {
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lp.width = width;
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}
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};
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public static final Property<LayoutParams, Integer> LAYOUT_HEIGHT =
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new Property<LayoutParams, Integer>(Integer.TYPE, "height") {
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@Override
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public Integer get(LayoutParams lp) {
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return lp.height;
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}
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@Override
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public void set(LayoutParams lp, Integer height) {
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lp.height = height;
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}
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};
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public static final FloatProperty<View> VIEW_TRANSLATE_X =
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View.TRANSLATION_X instanceof FloatProperty ? (FloatProperty) View.TRANSLATION_X
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: new FloatProperty<View>("translateX") {
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@Override
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public void setValue(View view, float v) {
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view.setTranslationX(v);
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}
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@Override
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public Float get(View view) {
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return view.getTranslationX();
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}
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};
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public static final FloatProperty<View> VIEW_TRANSLATE_Y =
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View.TRANSLATION_Y instanceof FloatProperty ? (FloatProperty) View.TRANSLATION_Y
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: new FloatProperty<View>("translateY") {
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@Override
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public void setValue(View view, float v) {
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view.setTranslationY(v);
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}
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@Override
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public Float get(View view) {
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return view.getTranslationY();
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}
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};
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}
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