diff options
Diffstat (limited to 'packages/SystemUI/src/com/android/systemui/ViewInvertHelper.java')
| -rw-r--r-- | packages/SystemUI/src/com/android/systemui/ViewInvertHelper.java | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/packages/SystemUI/src/com/android/systemui/ViewInvertHelper.java b/packages/SystemUI/src/com/android/systemui/ViewInvertHelper.java new file mode 100644 index 0000000..2ff8f8a --- /dev/null +++ b/packages/SystemUI/src/com/android/systemui/ViewInvertHelper.java @@ -0,0 +1,101 @@ +/* + * Copyright (C) 2014 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 com.android.systemui; + +import android.animation.Animator; +import android.animation.AnimatorListenerAdapter; +import android.animation.ValueAnimator; +import android.graphics.ColorMatrix; +import android.graphics.ColorMatrixColorFilter; +import android.graphics.Paint; +import android.view.View; +import android.view.animation.AnimationUtils; +import android.view.animation.Interpolator; + +import com.android.systemui.statusbar.phone.NotificationPanelView; + +/** + * Helper to invert the colors of views and fade between the states. + */ +public class ViewInvertHelper { + + private final Paint mDarkPaint = new Paint(); + private final Interpolator mLinearOutSlowInInterpolator; + private final View mTarget; + private final ColorMatrix mMatrix = new ColorMatrix(); + private final ColorMatrix mGrayscaleMatrix = new ColorMatrix(); + private final long mFadeDuration; + + public ViewInvertHelper(View target, long fadeDuration) { + mTarget = target; + mLinearOutSlowInInterpolator = AnimationUtils.loadInterpolator(mTarget.getContext(), + android.R.interpolator.linear_out_slow_in); + mFadeDuration = fadeDuration; + } + + public void fade(final boolean invert, long delay) { + float startIntensity = invert ? 0f : 1f; + float endIntensity = invert ? 1f : 0f; + ValueAnimator animator = ValueAnimator.ofFloat(startIntensity, endIntensity); + animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { + @Override + public void onAnimationUpdate(ValueAnimator animation) { + updateInvertPaint((Float) animation.getAnimatedValue()); + mTarget.setLayerType(View.LAYER_TYPE_HARDWARE, mDarkPaint); + } + }); + animator.addListener(new AnimatorListenerAdapter() { + @Override + public void onAnimationEnd(Animator animation) { + if (!invert) { + mTarget.setLayerType(View.LAYER_TYPE_NONE, null); + } + } + }); + animator.setDuration(mFadeDuration); + animator.setInterpolator(mLinearOutSlowInInterpolator); + animator.setStartDelay(delay); + animator.start(); + } + + public void update(boolean invert) { + if (invert) { + updateInvertPaint(1f); + mTarget.setLayerType(View.LAYER_TYPE_HARDWARE, mDarkPaint); + } else { + mTarget.setLayerType(View.LAYER_TYPE_NONE, null); + } + } + + public View getTarget() { + return mTarget; + } + + private void updateInvertPaint(float intensity) { + float components = 1 - 2 * intensity; + final float[] invert = { + components, 0f, 0f, 0f, 255f * intensity, + 0f, components, 0f, 0f, 255f * intensity, + 0f, 0f, components, 0f, 255f * intensity, + 0f, 0f, 0f, 1f, 0f + }; + mMatrix.set(invert); + mGrayscaleMatrix.setSaturation(1 - intensity); + mMatrix.preConcat(mGrayscaleMatrix); + mDarkPaint.setColorFilter(new ColorMatrixColorFilter(mMatrix)); + } +}
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