FloatingActionButtonEclairMr1.java revision 3d81c900316412b4130bf40e0dd8b0d3d3a93e78 
1/*
2 * Copyright (C) 2015 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 android.support.design.widget;
18
19import android.content.res.ColorStateList;
20import android.graphics.Color;
21import android.graphics.PorterDuff;
22import android.graphics.Rect;
23import android.graphics.drawable.Drawable;
24import android.graphics.drawable.GradientDrawable;
25import android.graphics.drawable.LayerDrawable;
26import android.support.annotation.Nullable;
27import android.support.design.R;
28import android.support.design.widget.AnimationUtils.AnimationListenerAdapter;
29import android.support.v4.graphics.drawable.DrawableCompat;
30import android.view.View;
31import android.view.animation.Animation;
32import android.view.animation.Transformation;
33
34class FloatingActionButtonEclairMr1 extends FloatingActionButtonImpl {
35
36    private int mAnimationDuration;
37    private StateListAnimator mStateListAnimator;
38    private boolean mIsHiding;
39
40    ShadowDrawableWrapper mShadowDrawable;
41
42    FloatingActionButtonEclairMr1(VisibilityAwareImageButton view,
43            ShadowViewDelegate shadowViewDelegate) {
44        super(view, shadowViewDelegate);
45
46        mAnimationDuration = view.getResources().getInteger(android.R.integer.config_shortAnimTime);
47
48        mStateListAnimator = new StateListAnimator();
49        mStateListAnimator.setTarget(view);
50
51        // Elevate with translationZ when pressed or focused
52        mStateListAnimator.addState(PRESSED_ENABLED_STATE_SET,
53                setupAnimation(new ElevateToTranslationZAnimation()));
54        mStateListAnimator.addState(FOCUSED_ENABLED_STATE_SET,
55                setupAnimation(new ElevateToTranslationZAnimation()));
56        // Reset back to elevation by default
57        mStateListAnimator.addState(EMPTY_STATE_SET,
58                setupAnimation(new ResetElevationAnimation()));
59    }
60
61    @Override
62    void setBackgroundDrawable(ColorStateList backgroundTint,
63            PorterDuff.Mode backgroundTintMode, int rippleColor, int borderWidth) {
64        // Now we need to tint the original background with the tint, using
65        // an InsetDrawable if we have a border width
66        mShapeDrawable = DrawableCompat.wrap(createShapeDrawable());
67        DrawableCompat.setTintList(mShapeDrawable, backgroundTint);
68        if (backgroundTintMode != null) {
69            DrawableCompat.setTintMode(mShapeDrawable, backgroundTintMode);
70        }
71
72        // Now we created a mask Drawable which will be used for touch feedback.
73        GradientDrawable touchFeedbackShape = createShapeDrawable();
74
75        // We'll now wrap that touch feedback mask drawable with a ColorStateList. We do not need
76        // to inset for any border here as LayerDrawable will nest the padding for us
77        mRippleDrawable = DrawableCompat.wrap(touchFeedbackShape);
78        DrawableCompat.setTintList(mRippleDrawable, createColorStateList(rippleColor));
79        DrawableCompat.setTintMode(mRippleDrawable, PorterDuff.Mode.MULTIPLY);
80
81        final Drawable[] layers;
82        if (borderWidth > 0) {
83            mBorderDrawable = createBorderDrawable(borderWidth, backgroundTint);
84            layers = new Drawable[] {mBorderDrawable, mShapeDrawable, mRippleDrawable};
85        } else {
86            mBorderDrawable = null;
87            layers = new Drawable[] {mShapeDrawable, mRippleDrawable};
88        }
89
90        mContentBackground = new LayerDrawable(layers);
91
92        mShadowDrawable = new ShadowDrawableWrapper(
93                mView.getResources(),
94                mContentBackground,
95                mShadowViewDelegate.getRadius(),
96                mElevation,
97                mElevation + mPressedTranslationZ);
98        mShadowDrawable.setAddPaddingForCorners(false);
99
100        mShadowViewDelegate.setBackgroundDrawable(mShadowDrawable);
101
102        updatePadding();
103    }
104
105    @Override
106    void setBackgroundTintList(ColorStateList tint) {
107        DrawableCompat.setTintList(mShapeDrawable, tint);
108        if (mBorderDrawable != null) {
109            mBorderDrawable.setBorderTint(tint);
110        }
111    }
112
113    @Override
114    void setBackgroundTintMode(PorterDuff.Mode tintMode) {
115        DrawableCompat.setTintMode(mShapeDrawable, tintMode);
116    }
117
118    @Override
119    void setRippleColor(int rippleColor) {
120        DrawableCompat.setTintList(mRippleDrawable, createColorStateList(rippleColor));
121    }
122
123    @Override
124    void onElevationChanged(float elevation) {
125        if (mShadowDrawable != null) {
126            mShadowDrawable.setShadowSize(elevation, elevation + mPressedTranslationZ);
127            updatePadding();
128        }
129    }
130
131    @Override
132    void onTranslationZChanged(float translationZ) {
133        if (mShadowDrawable != null) {
134            mShadowDrawable.setMaxShadowSize(mElevation + translationZ);
135            updatePadding();
136        }
137    }
138
139    @Override
140    void onDrawableStateChanged(int[] state) {
141        mStateListAnimator.setState(state);
142    }
143
144    @Override
145    void jumpDrawableToCurrentState() {
146        mStateListAnimator.jumpToCurrentState();
147    }
148
149    @Override
150    void hide(@Nullable final InternalVisibilityChangedListener listener, final boolean fromUser) {
151        if (mIsHiding || mView.getVisibility() != View.VISIBLE) {
152            // A hide animation is in progress, or we're already hidden. Skip the call
153            if (listener != null) {
154                listener.onHidden();
155            }
156            return;
157        }
158
159        Animation anim = android.view.animation.AnimationUtils.loadAnimation(
160                mView.getContext(), R.anim.design_fab_out);
161        anim.setInterpolator(AnimationUtils.FAST_OUT_LINEAR_IN_INTERPOLATOR);
162        anim.setDuration(SHOW_HIDE_ANIM_DURATION);
163        anim.setAnimationListener(new AnimationUtils.AnimationListenerAdapter() {
164            @Override
165            public void onAnimationStart(Animation animation) {
166                mIsHiding = true;
167            }
168
169            @Override
170            public void onAnimationEnd(Animation animation) {
171                mIsHiding = false;
172                mView.internalSetVisibility(View.GONE, fromUser);
173                if (listener != null) {
174                    listener.onHidden();
175                }
176            }
177        });
178        mView.startAnimation(anim);
179    }
180
181    @Override
182    void show(@Nullable final InternalVisibilityChangedListener listener, final boolean fromUser) {
183        if (mView.getVisibility() != View.VISIBLE || mIsHiding) {
184            // If the view is not visible, or is visible and currently being hidden, run
185            // the show animation
186            mView.clearAnimation();
187            mView.internalSetVisibility(View.VISIBLE, fromUser);
188            Animation anim = android.view.animation.AnimationUtils.loadAnimation(
189                    mView.getContext(), R.anim.design_fab_in);
190            anim.setDuration(SHOW_HIDE_ANIM_DURATION);
191            anim.setInterpolator(AnimationUtils.LINEAR_OUT_SLOW_IN_INTERPOLATOR);
192            anim.setAnimationListener(new AnimationListenerAdapter() {
193                @Override
194                public void onAnimationEnd(Animation animation) {
195                    if (listener != null) {
196                        listener.onShown();
197                    }
198                }
199            });
200            mView.startAnimation(anim);
201        } else {
202            if (listener != null) {
203                listener.onShown();
204            }
205        }
206    }
207
208    private void updatePadding() {
209        Rect rect = new Rect();
210        mShadowDrawable.getPadding(rect);
211        mShadowViewDelegate.setShadowPadding(rect.left, rect.top, rect.right, rect.bottom);
212    }
213
214    private Animation setupAnimation(Animation animation) {
215        animation.setInterpolator(AnimationUtils.FAST_OUT_SLOW_IN_INTERPOLATOR);
216        animation.setDuration(mAnimationDuration);
217        return animation;
218    }
219
220    private abstract class BaseShadowAnimation extends Animation {
221        private float mShadowSizeStart;
222        private float mShadowSizeDiff;
223
224        @Override
225        public void reset() {
226            super.reset();
227
228            mShadowSizeStart = mShadowDrawable.getShadowSize();
229            mShadowSizeDiff = getTargetShadowSize() - mShadowSizeStart;
230        }
231
232        @Override
233        protected void applyTransformation(float interpolatedTime, Transformation t) {
234            mShadowDrawable.setShadowSize(mShadowSizeStart + (mShadowSizeDiff * interpolatedTime));
235        }
236
237        /**
238         * @return the shadow size we want to animate to.
239         */
240        protected abstract float getTargetShadowSize();
241    }
242
243    private class ResetElevationAnimation extends BaseShadowAnimation {
244        @Override
245        protected float getTargetShadowSize() {
246            return mElevation;
247        }
248    }
249
250    private class ElevateToTranslationZAnimation extends BaseShadowAnimation {
251        @Override
252        protected float getTargetShadowSize() {
253            return mElevation + mPressedTranslationZ;
254        }
255    }
256
257    private static ColorStateList createColorStateList(int selectedColor) {
258        final int[][] states = new int[3][];
259        final int[] colors = new int[3];
260        int i = 0;
261
262        states[i] = FOCUSED_ENABLED_STATE_SET;
263        colors[i] = selectedColor;
264        i++;
265
266        states[i] = PRESSED_ENABLED_STATE_SET;
267        colors[i] = selectedColor;
268        i++;
269
270        // Default enabled state
271        states[i] = new int[0];
272        colors[i] = Color.TRANSPARENT;
273        i++;
274
275        return new ColorStateList(states, colors);
276    }
277}