diff options
Diffstat (limited to 'src/com/android/launcher3/allapps/AllAppsBackgroundDrawable.java')
-rw-r--r-- | src/com/android/launcher3/allapps/AllAppsBackgroundDrawable.java | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/src/com/android/launcher3/allapps/AllAppsBackgroundDrawable.java b/src/com/android/launcher3/allapps/AllAppsBackgroundDrawable.java new file mode 100644 index 000000000..117aca921 --- /dev/null +++ b/src/com/android/launcher3/allapps/AllAppsBackgroundDrawable.java @@ -0,0 +1,194 @@ +/* + * 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 com.android.launcher3.allapps; + +import android.animation.ObjectAnimator; +import android.content.Context; +import android.content.res.Resources; +import android.graphics.Canvas; +import android.graphics.ColorFilter; +import android.graphics.PixelFormat; +import android.graphics.Rect; +import android.graphics.drawable.Drawable; + +import android.view.Gravity; +import com.android.launcher3.R; + +/** + * A helper class to positon and orient a drawable to be drawn. + */ +class TransformedImageDrawable { + private Drawable mImage; + private float mXPercent; + private float mYPercent; + private int mGravity; + + /** + * @param gravity If one of the Gravity center values, the x and y offset will take the width + * and height of the image into account to center the image to the offset. + */ + public TransformedImageDrawable(Resources res, int resourceId, float xPct, float yPct, + int gravity) { + mImage = res.getDrawable(resourceId); + mXPercent = xPct; + mYPercent = yPct; + mGravity = gravity; + } + + public void setAlpha(int alpha) { + mImage.setAlpha(alpha); + } + + public int getAlpha() { + return mImage.getAlpha(); + } + + public void updateBounds(Rect bounds) { + int width = mImage.getIntrinsicWidth(); + int height = mImage.getIntrinsicHeight(); + int left = bounds.left + (int) (mXPercent * bounds.width()); + int top = bounds.top + (int) (mYPercent * bounds.height()); + if ((mGravity & Gravity.CENTER_HORIZONTAL) == Gravity.CENTER_HORIZONTAL) { + left -= (width / 2); + } + if ((mGravity & Gravity.CENTER_VERTICAL) == Gravity.CENTER_VERTICAL) { + top -= (height / 2); + } + mImage.setBounds(left, top, left + width, top + height); + } + + public void draw(Canvas canvas) { + int c = canvas.save(Canvas.MATRIX_SAVE_FLAG); + mImage.draw(canvas); + canvas.restoreToCount(c); + } +} + +/** + * This is a custom composite drawable that has a fixed virtual size and dynamically lays out its + * children images relatively within its bounds. This way, we can reduce the memory usage of a + * single, large sparsely populated image. + */ +public class AllAppsBackgroundDrawable extends Drawable { + + private final TransformedImageDrawable mHand; + private final TransformedImageDrawable[] mIcons; + private final int mWidth; + private final int mHeight; + + private ObjectAnimator mBackgroundAnim; + + public AllAppsBackgroundDrawable(Context context) { + Resources res = context.getResources(); + mHand = new TransformedImageDrawable(res, R.drawable.ic_all_apps_bg_hand, + 0.575f, 0.1f, Gravity.CENTER_HORIZONTAL); + mIcons = new TransformedImageDrawable[4]; + mIcons[0] = new TransformedImageDrawable(res, R.drawable.ic_all_apps_bg_icon_1, + 0.375f, 0, Gravity.CENTER_HORIZONTAL); + mIcons[1] = new TransformedImageDrawable(res, R.drawable.ic_all_apps_bg_icon_2, + 0.3125f, 0.25f, Gravity.CENTER_HORIZONTAL); + mIcons[2] = new TransformedImageDrawable(res, R.drawable.ic_all_apps_bg_icon_3, + 0.475f, 0.4f, Gravity.CENTER_HORIZONTAL); + mIcons[3] = new TransformedImageDrawable(res, R.drawable.ic_all_apps_bg_icon_4, + 0.7f, 0.125f, Gravity.CENTER_HORIZONTAL); + mWidth = res.getDimensionPixelSize(R.dimen.all_apps_background_canvas_width); + mHeight = res.getDimensionPixelSize(R.dimen.all_apps_background_canvas_height); + } + + /** + * Animates the background alpha. + */ + public void animateBgAlpha(float finalAlpha, int duration) { + int finalAlphaI = (int) (finalAlpha * 255f); + if (getAlpha() != finalAlphaI) { + mBackgroundAnim = cancelAnimator(mBackgroundAnim); + mBackgroundAnim = ObjectAnimator.ofInt(this, "alpha", finalAlphaI); + mBackgroundAnim.setDuration(duration); + mBackgroundAnim.start(); + } + } + + /** + * Sets the background alpha immediately. + */ + public void setBgAlpha(float finalAlpha) { + int finalAlphaI = (int) (finalAlpha * 255f); + if (getAlpha() != finalAlphaI) { + mBackgroundAnim = cancelAnimator(mBackgroundAnim); + setAlpha(finalAlphaI); + } + } + + @Override + public int getIntrinsicWidth() { + return mWidth; + } + + @Override + public int getIntrinsicHeight() { + return mHeight; + } + + @Override + public void draw(Canvas canvas) { + mHand.draw(canvas); + for (int i = 0; i < mIcons.length; i++) { + mIcons[i].draw(canvas); + } + } + + @Override + protected void onBoundsChange(Rect bounds) { + super.onBoundsChange(bounds); + mHand.updateBounds(bounds); + for (int i = 0; i < mIcons.length; i++) { + mIcons[i].updateBounds(bounds); + } + invalidateSelf(); + } + + @Override + public void setAlpha(int alpha) { + mHand.setAlpha(alpha); + for (int i = 0; i < mIcons.length; i++) { + mIcons[i].setAlpha(alpha); + } + invalidateSelf(); + } + + @Override + public int getAlpha() { + return mHand.getAlpha(); + } + + @Override + public void setColorFilter(ColorFilter colorFilter) { + // Do nothing + } + + @Override + public int getOpacity() { + return PixelFormat.TRANSLUCENT; + } + + private ObjectAnimator cancelAnimator(ObjectAnimator animator) { + if (animator != null) { + animator.removeAllListeners(); + animator.cancel(); + } + return null; + } +} |