/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.support.design.widget;
import android.content.Context;
import android.content.res.ColorStateList;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.GradientDrawable;
import android.support.annotation.Nullable;
import android.support.design.R;
import android.support.v4.content.ContextCompat;
import android.view.View;
import android.view.ViewTreeObserver;
import android.view.animation.Interpolator;
abstract class FloatingActionButtonImpl {
static final Interpolator ANIM_INTERPOLATOR = AnimationUtils.FAST_OUT_LINEAR_IN_INTERPOLATOR;
static final long PRESSED_ANIM_DURATION = 100;
static final long PRESSED_ANIM_DELAY = 100;
static final int ANIM_STATE_NONE = 0;
static final int ANIM_STATE_HIDING = 1;
static final int ANIM_STATE_SHOWING = 2;
int mAnimState = ANIM_STATE_NONE;
Drawable mShapeDrawable;
Drawable mRippleDrawable;
CircularBorderDrawable mBorderDrawable;
Drawable mContentBackground;
float mElevation;
float mPressedTranslationZ;
interface InternalVisibilityChangedListener {
public void onShown();
public void onHidden();
}
static final int SHOW_HIDE_ANIM_DURATION = 200;
static final int[] PRESSED_ENABLED_STATE_SET = {android.R.attr.state_pressed,
android.R.attr.state_enabled};
static final int[] FOCUSED_ENABLED_STATE_SET = {android.R.attr.state_focused,
android.R.attr.state_enabled};
static final int[] ENABLED_STATE_SET = {android.R.attr.state_enabled};
static final int[] EMPTY_STATE_SET = new int[0];
final VisibilityAwareImageButton mView;
final ShadowViewDelegate mShadowViewDelegate;
final ValueAnimatorCompat.Creator mAnimatorCreator;
private final Rect mTmpRect = new Rect();
private ViewTreeObserver.OnPreDrawListener mPreDrawListener;
FloatingActionButtonImpl(VisibilityAwareImageButton view,
ShadowViewDelegate shadowViewDelegate, ValueAnimatorCompat.Creator animatorCreator) {
mView = view;
mShadowViewDelegate = shadowViewDelegate;
mAnimatorCreator = animatorCreator;
}
abstract void setBackgroundDrawable(ColorStateList backgroundTint,
PorterDuff.Mode backgroundTintMode, int rippleColor, int borderWidth);
abstract void setBackgroundTintList(ColorStateList tint);
abstract void setBackgroundTintMode(PorterDuff.Mode tintMode);
abstract void setRippleColor(int rippleColor);
final void setElevation(float elevation) {
if (mElevation != elevation) {
mElevation = elevation;
onElevationsChanged(elevation, mPressedTranslationZ);
}
}
abstract float getElevation();
final void setPressedTranslationZ(float translationZ) {
if (mPressedTranslationZ != translationZ) {
mPressedTranslationZ = translationZ;
onElevationsChanged(mElevation, translationZ);
}
}
abstract void onElevationsChanged(float elevation, float pressedTranslationZ);
abstract void onDrawableStateChanged(int[] state);
abstract void jumpDrawableToCurrentState();
abstract void hide(@Nullable InternalVisibilityChangedListener listener, boolean fromUser);
abstract void show(@Nullable InternalVisibilityChangedListener listener, boolean fromUser);
final Drawable getContentBackground() {
return mContentBackground;
}
abstract void onCompatShadowChanged();
final void updatePadding() {
Rect rect = mTmpRect;
getPadding(rect);
onPaddingUpdated(rect);
mShadowViewDelegate.setShadowPadding(rect.left, rect.top, rect.right, rect.bottom);
}
abstract void getPadding(Rect rect);
void onPaddingUpdated(Rect padding) {}
void onAttachedToWindow() {
if (requirePreDrawListener()) {
ensurePreDrawListener();
mView.getViewTreeObserver().addOnPreDrawListener(mPreDrawListener);
}
}
void onDetachedFromWindow() {
if (mPreDrawListener != null) {
mView.getViewTreeObserver().removeOnPreDrawListener(mPreDrawListener);
mPreDrawListener = null;
}
}
boolean requirePreDrawListener() {
return false;
}
CircularBorderDrawable createBorderDrawable(int borderWidth, ColorStateList backgroundTint) {
final Context context = mView.getContext();
CircularBorderDrawable borderDrawable = newCircularDrawable();
borderDrawable.setGradientColors(
ContextCompat.getColor(context, R.color.design_fab_stroke_top_outer_color),
ContextCompat.getColor(context, R.color.design_fab_stroke_top_inner_color),
ContextCompat.getColor(context, R.color.design_fab_stroke_end_inner_color),
ContextCompat.getColor(context, R.color.design_fab_stroke_end_outer_color));
borderDrawable.setBorderWidth(borderWidth);
borderDrawable.setBorderTint(backgroundTint);
return borderDrawable;
}
CircularBorderDrawable newCircularDrawable() {
return new CircularBorderDrawable();
}
void onPreDraw() {
}
private void ensurePreDrawListener() {
if (mPreDrawListener == null) {
mPreDrawListener = new ViewTreeObserver.OnPreDrawListener() {
@Override
public boolean onPreDraw() {
FloatingActionButtonImpl.this.onPreDraw();
return true;
}
};
}
}
GradientDrawable createShapeDrawable() {
GradientDrawable d = newGradientDrawableForShape();
d.setShape(GradientDrawable.OVAL);
d.setColor(Color.WHITE);
return d;
}
GradientDrawable newGradientDrawableForShape() {
return new GradientDrawable();
}
boolean isOrWillBeShown() {
if (mView.getVisibility() != View.VISIBLE) {
// If we not currently visible, return true if we're animating to be shown
return mAnimState == ANIM_STATE_SHOWING;
} else {
// Otherwise if we're visible, return true if we're not animating to be hidden
return mAnimState != ANIM_STATE_HIDING;
}
}
boolean isOrWillBeHidden() {
if (mView.getVisibility() == View.VISIBLE) {
// If we currently visible, return true if we're animating to be hidden
return mAnimState == ANIM_STATE_HIDING;
} else {
// Otherwise if we're not visible, return true if we're not animating to be shown
return mAnimState != ANIM_STATE_SHOWING;
}
}
}