FloatingActionButtonEclairMr1.java revision 0ad7ef59b28d8ffafd551d2756b5a8ec47c90682 
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.os.Build;
27import android.support.annotation.Nullable;
28import android.support.design.R;
29import android.support.design.widget.AnimationUtils.AnimationListenerAdapter;
30import android.support.v4.graphics.drawable.DrawableCompat;
31import android.view.View;
32import android.view.animation.Animation;
33import android.view.animation.Transformation;
34
35class FloatingActionButtonEclairMr1 extends FloatingActionButtonImpl {
36
37    private Drawable mShapeDrawable;
38    private Drawable mRippleDrawable;
39    private Drawable mBorderDrawable;
40
41    private float mElevation;
42    private float mPressedTranslationZ;
43    private int mAnimationDuration;
44
45    private StateListAnimator mStateListAnimator;
46
47    ShadowDrawableWrapper mShadowDrawable;
48
49    private boolean mIsHiding;
50
51    FloatingActionButtonEclairMr1(View view, ShadowViewDelegate shadowViewDelegate) {
52        super(view, shadowViewDelegate);
53
54        mAnimationDuration = view.getResources().getInteger(android.R.integer.config_shortAnimTime);
55
56        mStateListAnimator = new StateListAnimator();
57        mStateListAnimator.setTarget(view);
58
59        // Elevate with translationZ when pressed or focused
60        mStateListAnimator.addState(PRESSED_ENABLED_STATE_SET,
61                setupAnimation(new ElevateToTranslationZAnimation()));
62        mStateListAnimator.addState(FOCUSED_ENABLED_STATE_SET,
63                setupAnimation(new ElevateToTranslationZAnimation()));
64        // Reset back to elevation by default
65        mStateListAnimator.addState(EMPTY_STATE_SET,
66                setupAnimation(new ResetElevationAnimation()));
67    }
68
69    @Override
70    void setBackgroundDrawable(Drawable originalBackground, ColorStateList backgroundTint,
71            PorterDuff.Mode backgroundTintMode, int rippleColor, int borderWidth) {
72        // Now we need to tint the original background with the tint, using
73        // an InsetDrawable if we have a border width
74        mShapeDrawable = DrawableCompat.wrap(mutateDrawable(originalBackground));
75        DrawableCompat.setTintList(mShapeDrawable, backgroundTint);
76        if (backgroundTintMode != null) {
77            DrawableCompat.setTintMode(mShapeDrawable, backgroundTintMode);
78        }
79
80        // Now we created a mask Drawable which will be used for touch feedback.
81        // As we don't know the actual outline of mShapeDrawable, we'll just guess that it's a
82        // circle
83        GradientDrawable touchFeedbackShape = new GradientDrawable();
84        touchFeedbackShape.setShape(GradientDrawable.OVAL);
85        touchFeedbackShape.setColor(Color.WHITE);
86        touchFeedbackShape.setCornerRadius(mShadowViewDelegate.getRadius());
87
88        // We'll now wrap that touch feedback mask drawable with a ColorStateList. We do not need
89        // to inset for any border here as LayerDrawable will nest the padding for us
90        mRippleDrawable = DrawableCompat.wrap(touchFeedbackShape);
91        DrawableCompat.setTintList(mRippleDrawable, createColorStateList(rippleColor));
92        DrawableCompat.setTintMode(mRippleDrawable, PorterDuff.Mode.MULTIPLY);
93
94        final Drawable[] layers;
95        if (borderWidth > 0) {
96            mBorderDrawable = createBorderDrawable(borderWidth, backgroundTint);
97            layers = new Drawable[] {mBorderDrawable, mShapeDrawable, mRippleDrawable};
98        } else {
99            mBorderDrawable = null;
100            layers = new Drawable[] {mShapeDrawable, mRippleDrawable};
101        }
102
103        mShadowDrawable = new ShadowDrawableWrapper(
104                mView.getResources(),
105                new LayerDrawable(layers),
106                mShadowViewDelegate.getRadius(),
107                mElevation,
108                mElevation + mPressedTranslationZ);
109        mShadowDrawable.setAddPaddingForCorners(false);
110
111        mShadowViewDelegate.setBackgroundDrawable(mShadowDrawable);
112
113        updatePadding();
114    }
115
116    private static Drawable mutateDrawable(Drawable drawable) {
117        if (Build.VERSION.SDK_INT < 14 && drawable instanceof GradientDrawable) {
118            // GradientDrawable pre-ICS does not copy over it's color when mutated. We just skip
119            // the mutate and hope for the best.
120            return drawable;
121        }
122        return drawable.mutate();
123    }
124
125    @Override
126    void setBackgroundTintList(ColorStateList tint) {
127        DrawableCompat.setTintList(mShapeDrawable, tint);
128        if (mBorderDrawable != null) {
129            DrawableCompat.setTintList(mBorderDrawable, tint);
130        }
131    }
132
133    @Override
134    void setBackgroundTintMode(PorterDuff.Mode tintMode) {
135        DrawableCompat.setTintMode(mShapeDrawable, tintMode);
136    }
137
138    @Override
139    void setRippleColor(int rippleColor) {
140        DrawableCompat.setTintList(mRippleDrawable, createColorStateList(rippleColor));
141    }
142
143    @Override
144    void setElevation(float elevation) {
145        if (mElevation != elevation && mShadowDrawable != null) {
146            mShadowDrawable.setShadowSize(elevation, elevation + mPressedTranslationZ);
147            mElevation = elevation;
148            updatePadding();
149        }
150    }
151
152    @Override
153    void setPressedTranslationZ(float translationZ) {
154        if (mPressedTranslationZ != translationZ && mShadowDrawable != null) {
155            mPressedTranslationZ = translationZ;
156            mShadowDrawable.setMaxShadowSize(mElevation + translationZ);
157            updatePadding();
158        }
159    }
160
161    @Override
162    void onDrawableStateChanged(int[] state) {
163        mStateListAnimator.setState(state);
164    }
165
166    @Override
167    void jumpDrawableToCurrentState() {
168        mStateListAnimator.jumpToCurrentState();
169    }
170
171    @Override
172    void hide(@Nullable final InternalVisibilityChangedListener listener) {
173        if (mIsHiding || mView.getVisibility() != View.VISIBLE) {
174            // A hide animation is in progress, or we're already hidden. Skip the call
175            if (listener != null) {
176                listener.onHidden();
177            }
178            return;
179        }
180
181        Animation anim = android.view.animation.AnimationUtils.loadAnimation(
182                mView.getContext(), R.anim.design_fab_out);
183        anim.setInterpolator(AnimationUtils.FAST_OUT_SLOW_IN_INTERPOLATOR);
184        anim.setDuration(SHOW_HIDE_ANIM_DURATION);
185        anim.setAnimationListener(new AnimationUtils.AnimationListenerAdapter() {
186            @Override
187            public void onAnimationStart(Animation animation) {
188                mIsHiding = true;
189            }
190
191            @Override
192            public void onAnimationEnd(Animation animation) {
193                mIsHiding = false;
194                mView.setVisibility(View.GONE);
195                if (listener != null) {
196                    listener.onHidden();
197                }
198            }
199        });
200        mView.startAnimation(anim);
201    }
202
203    @Override
204    void show(@Nullable final InternalVisibilityChangedListener listener) {
205        if (mView.getVisibility() != View.VISIBLE || mIsHiding) {
206            // If the view is not visible, or is visible and currently being hidden, run
207            // the show animation
208            mView.clearAnimation();
209            mView.setVisibility(View.VISIBLE);
210            Animation anim = android.view.animation.AnimationUtils.loadAnimation(
211                    mView.getContext(), R.anim.design_fab_in);
212            anim.setDuration(SHOW_HIDE_ANIM_DURATION);
213            anim.setInterpolator(AnimationUtils.FAST_OUT_SLOW_IN_INTERPOLATOR);
214            anim.setAnimationListener(new AnimationListenerAdapter() {
215                @Override
216                public void onAnimationEnd(Animation animation) {
217                    if (listener != null) {
218                        listener.onShown();
219                    }
220                }
221            });
222            mView.startAnimation(anim);
223        } else {
224            if (listener != null) {
225                listener.onShown();
226            }
227        }
228    }
229
230    private void updatePadding() {
231        Rect rect = new Rect();
232        mShadowDrawable.getPadding(rect);
233        mShadowViewDelegate.setShadowPadding(rect.left, rect.top, rect.right, rect.bottom);
234    }
235
236    private Animation setupAnimation(Animation animation) {
237        animation.setInterpolator(AnimationUtils.FAST_OUT_SLOW_IN_INTERPOLATOR);
238        animation.setDuration(mAnimationDuration);
239        return animation;
240    }
241
242    private abstract class BaseShadowAnimation extends Animation {
243        private float mShadowSizeStart;
244        private float mShadowSizeDiff;
245
246        @Override
247        public void reset() {
248            super.reset();
249
250            mShadowSizeStart = mShadowDrawable.getShadowSize();
251            mShadowSizeDiff = getTargetShadowSize() - mShadowSizeStart;
252        }
253
254        @Override
255        protected void applyTransformation(float interpolatedTime, Transformation t) {
256            mShadowDrawable.setShadowSize(mShadowSizeStart + (mShadowSizeDiff * interpolatedTime));
257        }
258
259        /**
260         * @return the shadow size we want to animate to.
261         */
262        protected abstract float getTargetShadowSize();
263    }
264
265    private class ResetElevationAnimation extends BaseShadowAnimation {
266        @Override
267        protected float getTargetShadowSize() {
268            return mElevation;
269        }
270    }
271
272    private class ElevateToTranslationZAnimation extends BaseShadowAnimation {
273        @Override
274        protected float getTargetShadowSize() {
275            return mElevation + mPressedTranslationZ;
276        }
277    }
278
279    private static ColorStateList createColorStateList(int selectedColor) {
280        final int[][] states = new int[3][];
281        final int[] colors = new int[3];
282        int i = 0;
283
284        states[i] = FOCUSED_ENABLED_STATE_SET;
285        colors[i] = selectedColor;
286        i++;
287
288        states[i] = PRESSED_ENABLED_STATE_SET;
289        colors[i] = selectedColor;
290        i++;
291
292        // Default enabled state
293        states[i] = new int[0];
294        colors[i] = Color.TRANSPARENT;
295        i++;
296
297        return new ColorStateList(states, colors);
298    }
299}