TaskViewTransform.java revision 5b7dd536aa6cb8ce323b47cee109f879feb0d33a 
1/*
2 * Copyright (C) 2014 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
17package com.android.systemui.recents.views;
18
19import android.animation.ValueAnimator;
20import android.graphics.RectF;
21import android.view.ViewPropertyAnimator;
22import android.view.animation.Interpolator;
23
24
25/* The transform state for a task view */
26public class TaskViewTransform {
27
28    // TODO: Move this out of the transform
29    public int startDelay = 0;
30
31    public int translationX = 0;
32    public int translationY = 0;
33    public float translationZ = 0;
34    public float scale = 1f;
35    public float alpha = 1f;
36
37    // Clip and thumbnail scale are untransformed layout-space properties
38    // The bottom clip is only used for freeform workspace tasks
39    public int clipBottom = 0;
40    public int clipRight = 0;
41    public float thumbnailScale = 1f;
42
43    public boolean visible = false;
44    float p = 0f;
45
46    // This is a window-space rect that is purely used for coordinating the animation of an app
47    // window into Recents.
48    public RectF rect = new RectF();
49
50    public TaskViewTransform() {
51        // Do nothing
52    }
53
54    /**
55     * Resets the current transform.
56     */
57    public void reset() {
58        startDelay = 0;
59        translationX = 0;
60        translationY = 0;
61        translationZ = 0;
62        scale = 1f;
63        alpha = 1f;
64        clipBottom = 0;
65        clipRight = 0;
66        thumbnailScale = 1f;
67        visible = false;
68        rect.setEmpty();
69        p = 0f;
70    }
71
72    /** Convenience functions to compare against current property values */
73    public boolean hasAlphaChangedFrom(float v) {
74        return (Float.compare(alpha, v) != 0);
75    }
76    public boolean hasScaleChangedFrom(float v) {
77        return (Float.compare(scale, v) != 0);
78    }
79    public boolean hasTranslationXChangedFrom(float v) {
80        return (Float.compare(translationX, v) != 0);
81    }
82    public boolean hasTranslationYChangedFrom(float v) {
83        return (Float.compare(translationY, v) != 0);
84    }
85    public boolean hasTranslationZChangedFrom(float v) {
86        return (Float.compare(translationZ, v) != 0);
87    }
88
89    /** Applies this transform to a view. */
90    public void applyToTaskView(TaskView v, int duration, Interpolator interp, boolean allowLayers,
91            boolean allowShadows, ValueAnimator.AnimatorUpdateListener updateCallback) {
92        // Check to see if any properties have changed, and update the task view
93        if (duration > 0) {
94            ViewPropertyAnimator anim = v.animate();
95            boolean requiresLayers = false;
96
97            // Animate to the final state
98            if (hasTranslationXChangedFrom(v.getTranslationX())) {
99                anim.translationX(translationX);
100            }
101            if (hasTranslationYChangedFrom(v.getTranslationY())) {
102                anim.translationY(translationY);
103            }
104            if (allowShadows && hasTranslationZChangedFrom(v.getTranslationZ())) {
105                anim.translationZ(translationZ);
106            }
107            if (hasScaleChangedFrom(v.getScaleX())) {
108                anim.scaleX(scale)
109                    .scaleY(scale);
110                requiresLayers = true;
111            }
112            if (hasAlphaChangedFrom(v.getAlpha())) {
113                // Use layers if we animate alpha
114                anim.alpha(alpha);
115                requiresLayers = true;
116            }
117            if (requiresLayers && allowLayers) {
118                anim.withLayer();
119            }
120            if (updateCallback != null) {
121                anim.setUpdateListener(updateCallback);
122            } else {
123                anim.setUpdateListener(null);
124            }
125            anim.setListener(null);
126            anim.setStartDelay(startDelay)
127                    .setDuration(duration)
128                    .setInterpolator(interp)
129                    .start();
130        } else {
131            // Set the changed properties
132            if (hasTranslationXChangedFrom(v.getTranslationX())) {
133                v.setTranslationX(translationX);
134            }
135            if (hasTranslationYChangedFrom(v.getTranslationY())) {
136                v.setTranslationY(translationY);
137            }
138            if (allowShadows && hasTranslationZChangedFrom(v.getTranslationZ())) {
139                v.setTranslationZ(translationZ);
140            }
141            if (hasScaleChangedFrom(v.getScaleX())) {
142                v.setScaleX(scale);
143                v.setScaleY(scale);
144            }
145            if (hasAlphaChangedFrom(v.getAlpha())) {
146                v.setAlpha(alpha);
147            }
148        }
149    }
150
151    /** Reset the transform on a view. */
152    public static void reset(TaskView v) {
153        // Cancel any running animations
154        v.animate().cancel();
155        v.setTranslationX(0f);
156        v.setTranslationY(0f);
157        v.setTranslationZ(0f);
158        v.setScaleX(1f);
159        v.setScaleY(1f);
160        v.setAlpha(1f);
161        v.getViewBounds().setClipRight(0, false /* forceUpdate */);
162        v.getViewBounds().setClipBottom(0, false /* forceUpdate */);
163        v.mThumbnailView.setBitmapScale(1f);
164    }
165
166    @Override
167    public String toString() {
168        return "TaskViewTransform delay: " + startDelay +
169                " x: " + translationX + " y: " + translationY + " z: " + translationZ +
170                " scale: " + scale + " alpha: " + alpha + " visible: " + visible + " rect: " + rect +
171                " p: " + p;
172    }
173}
174