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
80        final Drawable[] layers;
81        if (borderWidth > 0) {
82            mBorderDrawable = createBorderDrawable(borderWidth, backgroundTint);
83            layers = new Drawable[] {mBorderDrawable, mShapeDrawable, mRippleDrawable};
84        } else {
85            mBorderDrawable = null;
86            layers = new Drawable[] {mShapeDrawable, mRippleDrawable};
87        }
88
89        mContentBackground = new LayerDrawable(layers);
90
91        mShadowDrawable = new ShadowDrawableWrapper(
92                mView.getResources(),
93                mContentBackground,
94                mShadowViewDelegate.getRadius(),
95                mElevation,
96                mElevation + mPressedTranslationZ);
97        mShadowDrawable.setAddPaddingForCorners(false);
98        mShadowViewDelegate.setBackgroundDrawable(mShadowDrawable);
99    }
100
101    @Override
102    void setBackgroundTintList(ColorStateList tint) {
103        if (mShapeDrawable != null) {
104            DrawableCompat.setTintList(mShapeDrawable, tint);
105        }
106        if (mBorderDrawable != null) {
107            mBorderDrawable.setBorderTint(tint);
108        }
109    }
110
111    @Override
112    void setBackgroundTintMode(PorterDuff.Mode tintMode) {
113        if (mShapeDrawable != null) {
114            DrawableCompat.setTintMode(mShapeDrawable, tintMode);
115        }
116    }
117
118    @Override
119    void setRippleColor(int rippleColor) {
120        if (mRippleDrawable != null) {
121            DrawableCompat.setTintList(mRippleDrawable, createColorStateList(rippleColor));
122        }
123    }
124
125    @Override
126    float getElevation() {
127        return mElevation;
128    }
129
130    @Override
131    void onElevationChanged(float elevation) {
132        if (mShadowDrawable != null) {
133            mShadowDrawable.setShadowSize(elevation, elevation + mPressedTranslationZ);
134            updatePadding();
135        }
136    }
137
138    @Override
139    void onTranslationZChanged(float translationZ) {
140        if (mShadowDrawable != null) {
141            mShadowDrawable.setMaxShadowSize(mElevation + translationZ);
142            updatePadding();
143        }
144    }
145
146    @Override
147    void onDrawableStateChanged(int[] state) {
148        mStateListAnimator.setState(state);
149    }
150
151    @Override
152    void jumpDrawableToCurrentState() {
153        mStateListAnimator.jumpToCurrentState();
154    }
155
156    @Override
157    void hide(@Nullable final InternalVisibilityChangedListener listener, final boolean fromUser) {
158        if (mIsHiding || mView.getVisibility() != View.VISIBLE) {
159            // A hide animation is in progress, or we're already hidden. Skip the call
160            if (listener != null) {
161                listener.onHidden();
162            }
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_LINEAR_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.internalSetVisibility(View.GONE, fromUser);
180                if (listener != null) {
181                    listener.onHidden();
182                }
183            }
184        });
185        mView.startAnimation(anim);
186    }
187
188    @Override
189    void show(@Nullable final InternalVisibilityChangedListener listener, final boolean fromUser) {
190        if (mView.getVisibility() != View.VISIBLE || mIsHiding) {
191            // If the view is not visible, or is visible and currently being hidden, run
192            // the show animation
193            mView.clearAnimation();
194            mView.internalSetVisibility(View.VISIBLE, fromUser);
195            Animation anim = android.view.animation.AnimationUtils.loadAnimation(
196                    mView.getContext(), R.anim.design_fab_in);
197            anim.setDuration(SHOW_HIDE_ANIM_DURATION);
198            anim.setInterpolator(AnimationUtils.LINEAR_OUT_SLOW_IN_INTERPOLATOR);
199            anim.setAnimationListener(new AnimationListenerAdapter() {
200                @Override
201                public void onAnimationEnd(Animation animation) {
202                    if (listener != null) {
203                        listener.onShown();
204                    }
205                }
206            });
207            mView.startAnimation(anim);
208        } else {
209            if (listener != null) {
210                listener.onShown();
211            }
212        }
213    }
214
215    @Override
216    void onCompatShadowChanged() {
217        // Ignore pre-v21
218    }
219
220    void getPadding(Rect rect) {
221        mShadowDrawable.getPadding(rect);
222    }
223
224    private Animation setupAnimation(Animation animation) {
225        animation.setInterpolator(AnimationUtils.FAST_OUT_SLOW_IN_INTERPOLATOR);
226        animation.setDuration(mAnimationDuration);
227        return animation;
228    }
229
230    private abstract class BaseShadowAnimation extends Animation {
231        private float mShadowSizeStart;
232        private float mShadowSizeDiff;
233
234        @Override
235        public void reset() {
236            super.reset();
237
238            mShadowSizeStart = mShadowDrawable.getShadowSize();
239            mShadowSizeDiff = getTargetShadowSize() - mShadowSizeStart;
240        }
241
242        @Override
243        protected void applyTransformation(float interpolatedTime, Transformation t) {
244            mShadowDrawable.setShadowSize(mShadowSizeStart + (mShadowSizeDiff * interpolatedTime));
245        }
246
247        /**
248         * @return the shadow size we want to animate to.
249         */
250        protected abstract float getTargetShadowSize();
251    }
252
253    private class ResetElevationAnimation extends BaseShadowAnimation {
254        @Override
255        protected float getTargetShadowSize() {
256            return mElevation;
257        }
258    }
259
260    private class ElevateToTranslationZAnimation extends BaseShadowAnimation {
261        @Override
262        protected float getTargetShadowSize() {
263            return mElevation + mPressedTranslationZ;
264        }
265    }
266
267    private static ColorStateList createColorStateList(int selectedColor) {
268        final int[][] states = new int[3][];
269        final int[] colors = new int[3];
270        int i = 0;
271
272        states[i] = FOCUSED_ENABLED_STATE_SET;
273        colors[i] = selectedColor;
274        i++;
275
276        states[i] = PRESSED_ENABLED_STATE_SET;
277        colors[i] = selectedColor;
278        i++;
279
280        // Default enabled state
281        states[i] = new int[0];
282        colors[i] = Color.TRANSPARENT;
283        i++;
284
285        return new ColorStateList(states, colors);
286    }
287}