FloatingActionButtonEclairMr1.java revision a0f7a48850082ad48cf2639579331d8c792dbade 
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.design.R;
27import android.support.v4.graphics.drawable.DrawableCompat;
28import android.view.View;
29import android.view.animation.Animation;
30import android.view.animation.Transformation;
31
32class FloatingActionButtonEclairMr1 extends FloatingActionButtonImpl {
33
34    private Drawable mShapeDrawable;
35    private Drawable mRippleDrawable;
36    private Drawable mBorderDrawable;
37
38    private float mElevation;
39    private float mPressedTranslationZ;
40    private int mAnimationDuration;
41
42    private StateListAnimator mStateListAnimator;
43
44    ShadowDrawableWrapper mShadowDrawable;
45
46    private boolean mIsHiding;
47
48    FloatingActionButtonEclairMr1(View view, ShadowViewDelegate shadowViewDelegate) {
49        super(view, shadowViewDelegate);
50
51        mAnimationDuration = view.getResources().getInteger(android.R.integer.config_shortAnimTime);
52
53        mStateListAnimator = new StateListAnimator();
54        mStateListAnimator.setTarget(view);
55
56        // Elevate with translationZ when pressed or focused
57        mStateListAnimator.addState(PRESSED_ENABLED_STATE_SET,
58                setupAnimation(new ElevateToTranslationZAnimation()));
59        mStateListAnimator.addState(FOCUSED_ENABLED_STATE_SET,
60                setupAnimation(new ElevateToTranslationZAnimation()));
61        // Reset back to elevation by default
62        mStateListAnimator.addState(EMPTY_STATE_SET,
63                setupAnimation(new ResetElevationAnimation()));
64    }
65
66    @Override
67    void setBackgroundDrawable(Drawable originalBackground, ColorStateList backgroundTint,
68            PorterDuff.Mode backgroundTintMode, int rippleColor, int borderWidth) {
69        // Now we need to tint the original background with the tint, using
70        // an InsetDrawable if we have a border width
71        mShapeDrawable = DrawableCompat.wrap(originalBackground.mutate());
72        DrawableCompat.setTintList(mShapeDrawable, backgroundTint);
73        if (backgroundTintMode != null) {
74            DrawableCompat.setTintMode(mShapeDrawable, backgroundTintMode);
75        }
76
77        // Now we created a mask Drawable which will be used for touch feedback.
78        // As we don't know the actual outline of mShapeDrawable, we'll just guess that it's a
79        // circle
80        GradientDrawable touchFeedbackShape = new GradientDrawable();
81        touchFeedbackShape.setShape(GradientDrawable.OVAL);
82        touchFeedbackShape.setColor(Color.WHITE);
83        touchFeedbackShape.setCornerRadius(mShadowViewDelegate.getRadius());
84
85        // We'll now wrap that touch feedback mask drawable with a ColorStateList. We do not need
86        // to inset for any border here as LayerDrawable will nest the padding for us
87        mRippleDrawable = DrawableCompat.wrap(touchFeedbackShape);
88        DrawableCompat.setTintList(mRippleDrawable, createColorStateList(rippleColor));
89        DrawableCompat.setTintMode(mRippleDrawable, PorterDuff.Mode.MULTIPLY);
90
91        final Drawable[] layers;
92        if (borderWidth > 0) {
93            mBorderDrawable = createBorderDrawable(borderWidth, backgroundTint);
94            layers = new Drawable[] {mBorderDrawable, mShapeDrawable, mRippleDrawable};
95        } else {
96            mBorderDrawable = null;
97            layers = new Drawable[] {mShapeDrawable, mRippleDrawable};
98        }
99
100        mShadowDrawable = new ShadowDrawableWrapper(
101                mView.getResources(),
102                new LayerDrawable(layers),
103                mShadowViewDelegate.getRadius(),
104                mElevation,
105                mElevation + mPressedTranslationZ);
106        mShadowDrawable.setAddPaddingForCorners(false);
107
108        mShadowViewDelegate.setBackgroundDrawable(mShadowDrawable);
109
110        updatePadding();
111    }
112
113    @Override
114    void setBackgroundTintList(ColorStateList tint) {
115        DrawableCompat.setTintList(mShapeDrawable, tint);
116        if (mBorderDrawable != null) {
117            DrawableCompat.setTintList(mBorderDrawable, tint);
118        }
119    }
120
121    @Override
122    void setBackgroundTintMode(PorterDuff.Mode tintMode) {
123        DrawableCompat.setTintMode(mShapeDrawable, tintMode);
124    }
125
126    @Override
127    void setRippleColor(int rippleColor) {
128        DrawableCompat.setTintList(mRippleDrawable, createColorStateList(rippleColor));
129    }
130
131    @Override
132    void setElevation(float elevation) {
133        if (mElevation != elevation && mShadowDrawable != null) {
134            mShadowDrawable.setShadowSize(elevation, elevation + mPressedTranslationZ);
135            mElevation = elevation;
136            updatePadding();
137        }
138    }
139
140    @Override
141    void setPressedTranslationZ(float translationZ) {
142        if (mPressedTranslationZ != translationZ && mShadowDrawable != null) {
143            mPressedTranslationZ = translationZ;
144            mShadowDrawable.setMaxShadowSize(mElevation + translationZ);
145            updatePadding();
146        }
147    }
148
149    @Override
150    void onDrawableStateChanged(int[] state) {
151        mStateListAnimator.setState(state);
152    }
153
154    @Override
155    void jumpDrawableToCurrentState() {
156        mStateListAnimator.jumpToCurrentState();
157    }
158
159    @Override
160    void hide() {
161        if (mIsHiding) {
162            // There is currently an hide animation running, return
163            return;
164        }
165
166        Animation anim = android.view.animation.AnimationUtils.loadAnimation(
167                mView.getContext(), R.anim.design_fab_out);
168        anim.setInterpolator(AnimationUtils.FAST_OUT_SLOW_IN_INTERPOLATOR);
169        anim.setDuration(SHOW_HIDE_ANIM_DURATION);
170        anim.setAnimationListener(new AnimationUtils.AnimationListenerAdapter() {
171            @Override
172            public void onAnimationStart(Animation animation) {
173                mIsHiding = true;
174            }
175
176            @Override
177            public void onAnimationEnd(Animation animation) {
178                mIsHiding = false;
179                mView.setVisibility(View.GONE);
180            }
181        });
182        mView.startAnimation(anim);
183    }
184
185    @Override
186    void show() {
187        Animation anim = android.view.animation.AnimationUtils.loadAnimation(
188                mView.getContext(), R.anim.design_fab_in);
189        anim.setDuration(SHOW_HIDE_ANIM_DURATION);
190        anim.setInterpolator(AnimationUtils.FAST_OUT_SLOW_IN_INTERPOLATOR);
191        mView.startAnimation(anim);
192    }
193
194    private void updatePadding() {
195        Rect rect = new Rect();
196        mShadowDrawable.getPadding(rect);
197        mShadowViewDelegate.setShadowPadding(rect.left, rect.top, rect.right, rect.bottom);
198    }
199
200    private Animation setupAnimation(Animation animation) {
201        animation.setInterpolator(AnimationUtils.FAST_OUT_SLOW_IN_INTERPOLATOR);
202        animation.setDuration(mAnimationDuration);
203        return animation;
204    }
205
206    private abstract class BaseShadowAnimation extends Animation {
207        private float mShadowSizeStart;
208        private float mShadowSizeDiff;
209
210        @Override
211        public void reset() {
212            super.reset();
213
214            mShadowSizeStart = mShadowDrawable.getShadowSize();
215            mShadowSizeDiff = getTargetShadowSize() - mShadowSizeStart;
216        }
217
218        @Override
219        protected void applyTransformation(float interpolatedTime, Transformation t) {
220            mShadowDrawable.setShadowSize(mShadowSizeStart + (mShadowSizeDiff * interpolatedTime));
221        }
222
223        /**
224         * @return the shadow size we want to animate to.
225         */
226        protected abstract float getTargetShadowSize();
227    }
228
229    private class ResetElevationAnimation extends BaseShadowAnimation {
230        @Override
231        protected float getTargetShadowSize() {
232            return mElevation;
233        }
234    }
235
236    private class ElevateToTranslationZAnimation extends BaseShadowAnimation {
237        @Override
238        protected float getTargetShadowSize() {
239            return mElevation + mPressedTranslationZ;
240        }
241    }
242
243    private static ColorStateList createColorStateList(int selectedColor) {
244        final int[][] states = new int[3][];
245        final int[] colors = new int[3];
246        int i = 0;
247
248        states[i] = FOCUSED_ENABLED_STATE_SET;
249        colors[i] = selectedColor;
250        i++;
251
252        states[i] = PRESSED_ENABLED_STATE_SET;
253        colors[i] = selectedColor;
254        i++;
255
256        // Default enabled state
257        states[i] = new int[0];
258        colors[i] = Color.TRANSPARENT;
259        i++;
260
261        return new ColorStateList(states, colors);
262    }
263}