diff options
Diffstat (limited to 'src/com/android/launcher3/PreloadIconDrawable.java')
| -rw-r--r-- | src/com/android/launcher3/PreloadIconDrawable.java | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/src/com/android/launcher3/PreloadIconDrawable.java b/src/com/android/launcher3/PreloadIconDrawable.java new file mode 100644 index 000000000..2972c4f9b --- /dev/null +++ b/src/com/android/launcher3/PreloadIconDrawable.java @@ -0,0 +1,249 @@ +package com.android.launcher3; + +import android.animation.ObjectAnimator; +import android.content.res.Resources.Theme; +import android.content.res.TypedArray; +import android.graphics.Canvas; +import android.graphics.Color; +import android.graphics.ColorFilter; +import android.graphics.Paint; +import android.graphics.PixelFormat; +import android.graphics.Rect; +import android.graphics.RectF; +import android.graphics.drawable.Drawable; + +class PreloadIconDrawable extends Drawable { + + private static final float ANIMATION_PROGRESS_STOPPED = -1.0f; + private static final float ANIMATION_PROGRESS_STARTED = 0f; + private static final float ANIMATION_PROGRESS_COMPLETED = 1.0f; + + private static final float MIN_SATUNATION = 0.2f; + private static final float MIN_LIGHTNESS = 0.6f; + + private static final float ICON_SCALE_FACTOR = 0.5f; + private static final int DEFAULT_COLOR = 0xFF009688; + + private static final Rect sTempRect = new Rect(); + + private final RectF mIndicatorRect = new RectF(); + private boolean mIndicatorRectDirty; + + private final Paint mPaint; + final Drawable mIcon; + + private Drawable mBgDrawable; + private int mRingOutset; + + private int mIndicatorColor = 0; + + /** + * Indicates the progress of the preloader [0-100]. If it goes above 100, only the icon + * is shown with no progress bar. + */ + private int mProgress = 0; + + private float mAnimationProgress = ANIMATION_PROGRESS_STOPPED; + private ObjectAnimator mAnimator; + + public PreloadIconDrawable(Drawable icon, Theme theme) { + mIcon = icon; + + mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); + mPaint.setStyle(Paint.Style.STROKE); + mPaint.setStrokeCap(Paint.Cap.ROUND); + + setBounds(icon.getBounds()); + applyTheme(theme); + onLevelChange(0); + } + + @Override + public void applyTheme(Theme t) { + TypedArray ta = t.obtainStyledAttributes(R.styleable.PreloadIconDrawable); + mBgDrawable = ta.getDrawable(R.styleable.PreloadIconDrawable_background); + mBgDrawable.setFilterBitmap(true); + mPaint.setStrokeWidth(ta.getDimension(R.styleable.PreloadIconDrawable_indicatorSize, 0)); + mRingOutset = ta.getDimensionPixelSize(R.styleable.PreloadIconDrawable_ringOutset, 0); + ta.recycle(); + onBoundsChange(getBounds()); + invalidateSelf(); + } + + @Override + protected void onBoundsChange(Rect bounds) { + mIcon.setBounds(bounds); + if (mBgDrawable != null) { + sTempRect.set(bounds); + sTempRect.inset(-mRingOutset, -mRingOutset); + mBgDrawable.setBounds(sTempRect); + } + mIndicatorRectDirty = true; + } + + public int getOutset() { + return mRingOutset; + } + + /** + * The size of the indicator is same as the content region of the {@link #mBgDrawable} minus + * half the stroke size to accommodate the indicator. + */ + private void initIndicatorRect() { + Drawable d = mBgDrawable; + Rect bounds = d.getBounds(); + + d.getPadding(sTempRect); + // Amount by which padding has to be scaled + float paddingScaleX = ((float) bounds.width()) / d.getIntrinsicWidth(); + float paddingScaleY = ((float) bounds.height()) / d.getIntrinsicHeight(); + mIndicatorRect.set( + bounds.left + sTempRect.left * paddingScaleX, + bounds.top + sTempRect.top * paddingScaleY, + bounds.right - sTempRect.right * paddingScaleX, + bounds.bottom - sTempRect.bottom * paddingScaleY); + + float inset = mPaint.getStrokeWidth() / 2; + mIndicatorRect.inset(inset, inset); + mIndicatorRectDirty = false; + } + + @Override + public void draw(Canvas canvas) { + final Rect r = new Rect(getBounds()); + if (canvas.getClipBounds(sTempRect) && !Rect.intersects(sTempRect, r)) { + // The draw region has been clipped. + return; + } + if (mIndicatorRectDirty) { + initIndicatorRect(); + } + final float iconScale; + + if ((mAnimationProgress >= ANIMATION_PROGRESS_STARTED) + && (mAnimationProgress < ANIMATION_PROGRESS_COMPLETED)) { + mPaint.setAlpha((int) ((1 - mAnimationProgress) * 255)); + mBgDrawable.setAlpha(mPaint.getAlpha()); + mBgDrawable.draw(canvas); + canvas.drawOval(mIndicatorRect, mPaint); + + iconScale = ICON_SCALE_FACTOR + (1 - ICON_SCALE_FACTOR) * mAnimationProgress; + } else if (mAnimationProgress == ANIMATION_PROGRESS_STOPPED) { + mPaint.setAlpha(255); + iconScale = ICON_SCALE_FACTOR; + mBgDrawable.setAlpha(255); + mBgDrawable.draw(canvas); + + if (mProgress >= 100) { + canvas.drawOval(mIndicatorRect, mPaint); + } else if (mProgress > 0) { + canvas.drawArc(mIndicatorRect, -90, mProgress * 3.6f, false, mPaint); + } + } else { + iconScale = 1; + } + + canvas.save(); + canvas.scale(iconScale, iconScale, r.exactCenterX(), r.exactCenterY()); + mIcon.draw(canvas); + canvas.restore(); + } + + @Override + public int getOpacity() { + return PixelFormat.TRANSLUCENT; + } + + @Override + public void setAlpha(int alpha) { + mIcon.setAlpha(alpha); + } + + @Override + public void setColorFilter(ColorFilter cf) { + mIcon.setColorFilter(cf); + } + + @Override + protected boolean onLevelChange(int level) { + mProgress = level; + + // Stop Animation + if (mAnimator != null) { + mAnimator.cancel(); + mAnimator = null; + } + mAnimationProgress = ANIMATION_PROGRESS_STOPPED; + if (level > 0) { + // Set the paint color only when the level changes, so that the dominant color + // is only calculated when needed. + mPaint.setColor(getIndicatorColor()); + } + if (mIcon instanceof FastBitmapDrawable) { + ((FastBitmapDrawable) mIcon).setGhostModeEnabled(level <= 0); + } + + invalidateSelf(); + return true; + } + + /** + * Runs the finish animation if it is has not been run after last level change. + */ + public void maybePerformFinishedAnimation() { + if (mAnimationProgress > ANIMATION_PROGRESS_STOPPED) { + return; + } + if (mAnimator != null) { + mAnimator.cancel(); + } + setAnimationProgress(ANIMATION_PROGRESS_STARTED); + mAnimator = ObjectAnimator.ofFloat(this, "animationProgress", + ANIMATION_PROGRESS_STARTED, ANIMATION_PROGRESS_COMPLETED); + mAnimator.start(); + } + + public void setAnimationProgress(float progress) { + if (progress != mAnimationProgress) { + mAnimationProgress = progress; + invalidateSelf(); + } + } + + public float getAnimationProgress() { + return mAnimationProgress; + } + + @Override + public int getIntrinsicHeight() { + return mIcon.getIntrinsicHeight(); + } + + @Override + public int getIntrinsicWidth() { + return mIcon.getIntrinsicWidth(); + } + + private int getIndicatorColor() { + if (mIndicatorColor != 0) { + return mIndicatorColor; + } + if (!(mIcon instanceof FastBitmapDrawable)) { + mIndicatorColor = DEFAULT_COLOR; + return mIndicatorColor; + } + mIndicatorColor = Utilities.findDominantColorByHue( + ((FastBitmapDrawable) mIcon).getBitmap(), 20); + + // Make sure that the dominant color has enough saturation to be visible properly. + float[] hsv = new float[3]; + Color.colorToHSV(mIndicatorColor, hsv); + if (hsv[1] < MIN_SATUNATION) { + mIndicatorColor = DEFAULT_COLOR; + return mIndicatorColor; + } + hsv[2] = Math.max(MIN_LIGHTNESS, hsv[2]); + mIndicatorColor = Color.HSVToColor(hsv); + return mIndicatorColor; + } +} |