/*
* 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 in.srain.cube.views.ptr.header;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.*;
import android.graphics.Paint.Style;
import android.graphics.drawable.Animatable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.os.Build;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.animation.*;
import android.view.animation.Interpolator;
import in.srain.cube.views.ptr.util.PtrLocalDisplay;
import java.util.ArrayList;
/**
* Fancy progress indicator for Material theme.
* It's taken from {@link android.support.v4.widget}.
* I've done some slight changes.
*
* @hide
*/
public class MaterialProgressDrawable extends Drawable implements Animatable {
// Maps to ProgressBar.Large style
public static final int LARGE = 0;
// Maps to ProgressBar default style
public static final int DEFAULT = 1;
private static final Interpolator LINEAR_INTERPOLATOR = new LinearInterpolator();
private static final Interpolator END_CURVE_INTERPOLATOR = new EndCurveInterpolator();
private static final Interpolator START_CURVE_INTERPOLATOR = new StartCurveInterpolator();
private static final Interpolator EASE_INTERPOLATOR = new AccelerateDecelerateInterpolator();
// Maps to ProgressBar default style
private static final int CIRCLE_DIAMETER = 40;
private static final float CENTER_RADIUS = 8.75f; //should add up to 10 when + stroke_width
private static final float STROKE_WIDTH = 2.5f;
// Maps to ProgressBar.Large style
private static final int CIRCLE_DIAMETER_LARGE = 56;
private static final float CENTER_RADIUS_LARGE = 12.5f;
private static final float STROKE_WIDTH_LARGE = 3f;
/**
* The duration of a single progress spin in milliseconds.
*/
private static final int ANIMATION_DURATION = 1000 * 80 / 60;
/**
* The number of points in the progress "star".
*/
private static final float NUM_POINTS = 5f;
/**
* Layout info for the arrowhead in dp
*/
private static final int ARROW_WIDTH = 10;
private static final int ARROW_HEIGHT = 5;
private static final float ARROW_OFFSET_ANGLE = 5;
/**
* Layout info for the arrowhead for the large spinner in dp
*/
private static final int ARROW_WIDTH_LARGE = 12;
private static final int ARROW_HEIGHT_LARGE = 6;
private static final float MAX_PROGRESS_ARC = .8f;
private static final int KEY_SHADOW_COLOR = 0x1E000000;
private static final int FILL_SHADOW_COLOR = 0x3D000000;
private static final float SHADOW_RADIUS = 3.5f;
private static final float X_OFFSET = 0f;
private static final float Y_OFFSET = 1.75f;
private final int[] COLORS = new int[]{
0xFFC93437,
0xFF375BF1,
0xFFF7D23E,
0xFF34A350
};
/**
* The list of animators operating on this drawable.
*/
private final ArrayList<Animation> mAnimators = new ArrayList<Animation>();
/**
* The indicator ring, used to manage animation state.
*/
private final Ring mRing;
private final Callback mCallback = new Callback() {
@Override
public void invalidateDrawable(Drawable d) {
invalidateSelf();
}
@Override
public void scheduleDrawable(Drawable d, Runnable what, long when) {
scheduleSelf(what, when);
}
@Override
public void unscheduleDrawable(Drawable d, Runnable what) {
unscheduleSelf(what);
}
};
/**
* Canvas rotation in degrees.
*/
private float mRotation;
private Resources mResources;
private View mParent;
private Animation mAnimation;
private float mRotationCount;
private double mWidth;
private double mHeight;
private Animation mFinishAnimation;
private int mBackgroundColor;
private ShapeDrawable mShadow;
public MaterialProgressDrawable(Context context, View parent) {
mParent = parent;
mResources = context.getResources();
mRing = new Ring(mCallback);
mRing.setColors(COLORS);
updateSizes(DEFAULT);
setupAnimators();
}
private void setSizeParameters(double progressCircleWidth, double progressCircleHeight,
double centerRadius, double strokeWidth, float arrowWidth, float arrowHeight) {
final Ring ring = mRing;
final DisplayMetrics metrics = mResources.getDisplayMetrics();
final float screenDensity = metrics.density;
mWidth = progressCircleWidth * screenDensity;
mHeight = progressCircleHeight * screenDensity;
ring.setStrokeWidth((float) strokeWidth * screenDensity);
ring.setCenterRadius(centerRadius * screenDensity);
ring.setColorIndex(0);
ring.setArrowDimensions(arrowWidth * screenDensity, arrowHeight * screenDensity);
ring.setInsets((int) mWidth, (int) mHeight);
setUp(mWidth);
}
private void setUp(final double diameter) {
PtrLocalDisplay.init(mParent.getContext());
final int shadowYOffset = PtrLocalDisplay.dp2px(Y_OFFSET);
final int shadowXOffset = PtrLocalDisplay.dp2px(X_OFFSET);
int mShadowRadius = PtrLocalDisplay.dp2px(SHADOW_RADIUS);
OvalShape oval = new OvalShadow(mShadowRadius, (int) diameter);
mShadow = new ShapeDrawable(oval);
if (Build.VERSION.SDK_INT >= 11) {
mParent.setLayerType(View.LAYER_TYPE_SOFTWARE, mShadow.getPaint());
}
mShadow.getPaint().setShadowLayer(mShadowRadius, shadowXOffset, shadowYOffset, KEY_SHADOW_COLOR);
}
/**
* Set the overall size for the progress spinner. This updates the radius
* and stroke width of the ring.
*
* @param size One of {@link MaterialProgressDrawable#LARGE} or
* {@link MaterialProgressDrawable#DEFAULT}
*/
public void updateSizes(int size) {
if (size == LARGE) {
setSizeParameters(CIRCLE_DIAMETER_LARGE, CIRCLE_DIAMETER_LARGE, CENTER_RADIUS_LARGE,
STROKE_WIDTH_LARGE, ARROW_WIDTH_LARGE, ARROW_HEIGHT_LARGE);
} else {
setSizeParameters(CIRCLE_DIAMETER, CIRCLE_DIAMETER, CENTER_RADIUS, STROKE_WIDTH,
ARROW_WIDTH, ARROW_HEIGHT);
}
}
/**
* @param show Set to true to display the arrowhead on the progress spinner.
*/
public void showArrow(boolean show) {
mRing.setShowArrow(show);
}
/**
* @param scale Set the scale of the arrowhead for the spinner.
*/
public void setArrowScale(float scale) {
mRing.setArrowScale(scale);
}
/**
* Set the start and end trim for the progress spinner arc.
*
* @param startAngle start angle
* @param endAngle end angle
*/
public void setStartEndTrim(float startAngle, float endAngle) {
mRing.setStartTrim(startAngle);
mRing.setEndTrim(endAngle);
}
/**
* Set the amount of rotation to apply to the progress spinner.
*
* @param rotation Rotation is from [0..1]
*/
public void setProgressRotation(float rotation) {
mRing.setRotation(rotation);
}
/**
* Update the background color of the circle image view.
*/
public void setBackgroundColor(int color) {
mBackgroundColor = color;
mRing.setBackgroundColor(color);
}
/**
* Set the colors used in the progress animation from color resources.
* The first color will also be the color of the bar that grows in response
* to a user swipe gesture.
*
* @param colors
*/
public void setColorSchemeColors(int... colors) {
mRing.setColors(colors);
mRing.setColorIndex(0);
}
@Override
public int getIntrinsicHeight() {
return (int) mHeight;
}
@Override
public int getIntrinsicWidth() {
return (int) mWidth;
}
@Override
public void draw(Canvas c) {
if (mShadow != null) {
mShadow.getPaint().setColor(mBackgroundColor);
mShadow.draw(c);
}
final Rect bounds = getBounds();
final int saveCount = c.save();
c.rotate(mRotation, bounds.exactCenterX(), bounds.exactCenterY());
mRing.draw(c, bounds);
c.restoreToCount(saveCount);
}
public int getAlpha() {
return mRing.getAlpha();
}
@Override
public void setAlpha(int alpha) {
mRing.setAlpha(alpha);
}
@Override
public void setColorFilter(ColorFilter colorFilter) {
mRing.setColorFilter(colorFilter);
}
@SuppressWarnings("unused")
private float getRotation() {
return mRotation;
}
@SuppressWarnings("unused")
void setRotation(float rotation) {
mRotation = rotation;
invalidateSelf();
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
@Override
public boolean isRunning() {
final ArrayList<Animation> animators = mAnimators;
final int N = animators.size();
for (int i = 0; i < N; i++) {
final Animation animator = animators.get(i);
if (animator.hasStarted() && !animator.hasEnded()) {
return true;
}
}
return false;
}
@Override
public void start() {
mAnimation.reset();
mRing.storeOriginals();
// Already showing some part of the ring
if (mRing.getEndTrim() != mRing.getStartTrim()) {
mParent.startAnimation(mFinishAnimation);
} else {
mRing.setColorIndex(0);
mRing.resetOriginals();
mParent.startAnimation(mAnimation);
}
}
@Override
public void stop() {
mParent.clearAnimation();
setRotation(0);
mRing.setShowArrow(false);
mRing.setColorIndex(0);
mRing.resetOriginals();
}
private void setupAnimators() {
final Ring ring = mRing;
final Animation finishRingAnimation = new Animation() {
public void applyTransformation(float interpolatedTime, Transformation t) {
// shrink back down and complete a full rotation before starting other circles
// Rotation goes between [0..1].
float targetRotation = (float) (Math.floor(ring.getStartingRotation()
/ MAX_PROGRESS_ARC) + 1f);
final float startTrim = ring.getStartingStartTrim()
+ (ring.getStartingEndTrim() - ring.getStartingStartTrim())
* interpolatedTime;
ring.setStartTrim(startTrim);
final float rotation = ring.getStartingRotation()
+ ((targetRotation - ring.getStartingRotation()) * interpolatedTime);
ring.setRotation(rotation);
ring.setArrowScale(1 - interpolatedTime);
}
};
finishRingAnimation.setInterpolator(EASE_INTERPOLATOR);
finishRingAnimation.setDuration(ANIMATION_DURATION / 2);
finishRingAnimation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
ring.goToNextColor();
ring.storeOriginals();
ring.setShowArrow(false);
mParent.startAnimation(mAnimation);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
final Animation animation = new Animation() {
@Override
public void applyTransformation(float interpolatedTime, Transformation t) {
// The minProgressArc is calculated from 0 to create an angle that
// matches the stroke width.
final float minProgressArc = (float) Math.toRadians(ring.getStrokeWidth()
/ (2 * Math.PI * ring.getCenterRadius()));
final float startingEndTrim = ring.getStartingEndTrim();
final float startingTrim = ring.getStartingStartTrim();
final float startingRotation = ring.getStartingRotation();
// Offset the minProgressArc to where the endTrim is located.
final float minArc = MAX_PROGRESS_ARC - minProgressArc;
final float endTrim = startingEndTrim
+ (minArc * START_CURVE_INTERPOLATOR.getInterpolation(interpolatedTime));
ring.setEndTrim(endTrim);
final float startTrim = startingTrim
+ (MAX_PROGRESS_ARC * END_CURVE_INTERPOLATOR
.getInterpolation(interpolatedTime));
ring.setStartTrim(startTrim);
final float rotation = startingRotation + (0.25f * interpolatedTime);
ring.setRotation(rotation);
float groupRotation = ((720.0f / NUM_POINTS) * interpolatedTime)
+ (720.0f * (mRotationCount / NUM_POINTS));
setRotation(groupRotation);
}
};
animation.setRepeatCount(Animation.INFINITE);
animation.setRepeatMode(Animation.RESTART);
animation.setInterpolator(LINEAR_INTERPOLATOR);
animation.setDuration(ANIMATION_DURATION);
animation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
mRotationCount = 0;
}
@Override
public void onAnimationEnd(Animation animation) {
// do nothing
}
@Override
public void onAnimationRepeat(Animation animation) {
ring.storeOriginals();
ring.goToNextColor();
ring.setStartTrim(ring.getEndTrim());
mRotationCount = (mRotationCount + 1) % (NUM_POINTS);
}
});
mFinishAnimation = finishRingAnimation;
mAnimation = animation;
}
private static class Ring {
private final RectF mTempBounds = new RectF();
private final Paint mArcPaint = new Paint();
private final Paint mArrowPaint = new Paint();
private final Callback mRingCallback;
private final Paint mCirclePaint = new Paint();
private float mStartTrim = 0.0f;
private float mEndTrim = 0.0f;
private float mRotation = 0.0f;
private float mStrokeWidth = 5.0f;
private float mStrokeInset = 2.5f;
private int[] mColors;
// mColorIndex represents the offset into the available mColors that the
// progress circle should currently display. As the progress circle is
// animating, the mColorIndex moves by one to the next available color.
private int mColorIndex;
private float mStartingStartTrim;
private float mStartingEndTrim;
private float mStartingRotation;
private boolean mShowArrow;
private Path mArrow;
private float mArrowScale;
private double mRingCenterRadius;
private int mArrowWidth;
private int mArrowHeight;
private int mAlpha;
private int mBackgroundColor;
public Ring(Callback callback) {
mRingCallback = callback;
mArcPaint.setStrokeCap(Paint.Cap.SQUARE);
mArcPaint.setAntiAlias(true);
mArcPaint.setStyle(Style.STROKE);
mArrowPaint.setStyle(Style.FILL);
mArrowPaint.setAntiAlias(true);
mCirclePaint.setAntiAlias(true);
}
public void setBackgroundColor(int color) {
mBackgroundColor = color;
}
/**
* Set the dimensions of the arrowhead.
*
* @param width Width of the hypotenuse of the arrow head
* @param height Height of the arrow point
*/
public void setArrowDimensions(float width, float height) {
mArrowWidth = (int) width;
mArrowHeight = (int) height;
}
/**
* Draw the progress spinner
*/
public void draw(Canvas c, Rect bounds) {
mCirclePaint.setColor(mBackgroundColor);
mCirclePaint.setAlpha(mAlpha);
c.drawCircle(bounds.exactCenterX(), bounds.exactCenterY(), bounds.width() / 2, mCirclePaint);
final RectF arcBounds = mTempBounds;
arcBounds.set(bounds);
arcBounds.inset(mStrokeInset, mStrokeInset);
final float startAngle = (mStartTrim + mRotation) * 360;
final float endAngle = (mEndTrim + mRotation) * 360;
float sweepAngle = endAngle - startAngle;
mArcPaint.setColor(mColors[mColorIndex]);
mArcPaint.setAlpha(mAlpha);
c.drawArc(arcBounds, startAngle, sweepAngle, false, mArcPaint);
drawTriangle(c, startAngle, sweepAngle, bounds);
}
private void drawTriangle(Canvas c, float startAngle, float sweepAngle, Rect bounds) {
if (mShowArrow) {
if (mArrow == null) {
mArrow = new Path();
mArrow.setFillType(Path.FillType.EVEN_ODD);
} else {
mArrow.reset();
}
// Adjust the position of the triangle so that it is inset as
// much as the arc, but also centered on the arc.
float inset = (int) mStrokeInset / 2 * mArrowScale;
float x = (float) (mRingCenterRadius * Math.cos(0) + bounds.exactCenterX());
float y = (float) (mRingCenterRadius * Math.sin(0) + bounds.exactCenterY());
// Update the path each time. This works around an issue in SKIA
// where concatenating a rotation matrix to a scale matrix
// ignored a starting negative rotation. This appears to have
// been fixed as of API 21.
mArrow.moveTo(0, 0);
mArrow.lineTo(mArrowWidth * mArrowScale, 0);
mArrow.lineTo((mArrowWidth * mArrowScale / 2), (mArrowHeight
* mArrowScale));
mArrow.offset(x - inset, y);
mArrow.close();
// draw a triangle
mArrowPaint.setColor(mColors[mColorIndex]);
mArrowPaint.setAlpha(mAlpha);
c.rotate(startAngle + sweepAngle - ARROW_OFFSET_ANGLE, bounds.exactCenterX(),
bounds.exactCenterY());
c.drawPath(mArrow, mArrowPaint);
}
}
/**
* Set the colors the progress spinner alternates between.
*
* @param colors Array of integers describing the colors. Must be non-<code>null</code>.
*/
public void setColors(int[] colors) {
mColors = colors;
// if colors are reset, make sure to reset the color index as well
setColorIndex(0);
}
/**
* @param index Index into the color array of the color to display in
* the progress spinner.
*/
public void setColorIndex(int index) {
mColorIndex = index;
}
/**
* Proceed to the next available ring color. This will automatically
* wrap back to the beginning of colors.
*/
public void goToNextColor() {
mColorIndex = (mColorIndex + 1) % (mColors.length);
}
public void setColorFilter(ColorFilter filter) {
mArcPaint.setColorFilter(filter);
invalidateSelf();
}
/**
* @return Current alpha of the progress spinner and arrowhead.
*/
public int getAlpha() {
return mAlpha;
}
/**
* @param alpha Set the alpha of the progress spinner and associated arrowhead.
*/
public void setAlpha(int alpha) {
mAlpha = alpha;
}
@SuppressWarnings("unused")
public float getStrokeWidth() {
return mStrokeWidth;
}
/**
* @param strokeWidth Set the stroke width of the progress spinner in pixels.
*/
public void setStrokeWidth(float strokeWidth) {
mStrokeWidth = strokeWidth;
mArcPaint.setStrokeWidth(strokeWidth);
invalidateSelf();
}
@SuppressWarnings("unused")
public float getStartTrim() {
return mStartTrim;
}
@SuppressWarnings("unused")
public void setStartTrim(float startTrim) {
mStartTrim = startTrim;
invalidateSelf();
}
public float getStartingStartTrim() {
return mStartingStartTrim;
}
public float getStartingEndTrim() {
return mStartingEndTrim;
}
@SuppressWarnings("unused")
public float getEndTrim() {
return mEndTrim;
}
@SuppressWarnings("unused")
public void setEndTrim(float endTrim) {
mEndTrim = endTrim;
invalidateSelf();
}
@SuppressWarnings("unused")
public float getRotation() {
return mRotation;
}
@SuppressWarnings("unused")
public void setRotation(float rotation) {
mRotation = rotation;
invalidateSelf();
}
public void setInsets(int width, int height) {
final float minEdge = (float) Math.min(width, height);
float insets;
if (mRingCenterRadius <= 0 || minEdge < 0) {
insets = (float) Math.ceil(mStrokeWidth / 2.0f);
} else {
insets = (float) (minEdge / 2.0f - mRingCenterRadius);
}
mStrokeInset = insets;
}
@SuppressWarnings("unused")
public float getInsets() {
return mStrokeInset;
}
public double getCenterRadius() {
return mRingCenterRadius;
}
/**
* @param centerRadius Inner radius in px of the circle the progress
* spinner arc traces.
*/
public void setCenterRadius(double centerRadius) {
mRingCenterRadius = centerRadius;
}
/**
* @param show Set to true to show the arrow head on the progress spinner.
*/
public void setShowArrow(boolean show) {
if (mShowArrow != show) {
mShowArrow = show;
invalidateSelf();
}
}
/**
* @param scale Set the scale of the arrowhead for the spinner.
*/
public void setArrowScale(float scale) {
if (scale != mArrowScale) {
mArrowScale = scale;
invalidateSelf();
}
}
/**
* @return The amount the progress spinner is currently rotated, between [0..1].
*/
public float getStartingRotation() {
return mStartingRotation;
}
/**
* If the start / end trim are offset to begin with, store them so that
* animation starts from that offset.
*/
public void storeOriginals() {
mStartingStartTrim = mStartTrim;
mStartingEndTrim = mEndTrim;
mStartingRotation = mRotation;
}
/**
* Reset the progress spinner to default rotation, start and end angles.
*/
public void resetOriginals() {
mStartingStartTrim = 0;
mStartingEndTrim = 0;
mStartingRotation = 0;
setStartTrim(0);
setEndTrim(0);
setRotation(0);
}
private void invalidateSelf() {
mRingCallback.invalidateDrawable(null);
}
}
/**
* Squishes the interpolation curve into the second half of the animation.
*/
private static class EndCurveInterpolator extends AccelerateDecelerateInterpolator {
@Override
public float getInterpolation(float input) {
return super.getInterpolation(Math.max(0, (input - 0.5f) * 2.0f));
}
}
/**
* Squishes the interpolation curve into the first half of the animation.
*/
private static class StartCurveInterpolator extends AccelerateDecelerateInterpolator {
@Override
public float getInterpolation(float input) {
return super.getInterpolation(Math.min(1, input * 2.0f));
}
}
/**
* Taken from {@link package android.support.v4.widget}
*/
private class OvalShadow extends OvalShape {
private RadialGradient mRadialGradient;
private int mShadowRadius;
private Paint mShadowPaint;
private int mCircleDiameter;
public OvalShadow(int shadowRadius, int circleDiameter) {
super();
mShadowPaint = new Paint();
mShadowRadius = shadowRadius;
mCircleDiameter = circleDiameter;
mRadialGradient = new RadialGradient(mCircleDiameter / 2, mCircleDiameter / 2,
mShadowRadius, new int[]{
FILL_SHADOW_COLOR, Color.TRANSPARENT
}, null, Shader.TileMode.CLAMP);
mShadowPaint.setShader(mRadialGradient);
}
@Override
public void draw(Canvas canvas, Paint paint) {
final int viewWidth = getBounds().width();
final int viewHeight = getBounds().height();
canvas.drawCircle(viewWidth / 2, viewHeight / 2, (mCircleDiameter / 2 + mShadowRadius),
mShadowPaint);
canvas.drawCircle(viewWidth / 2, viewHeight / 2, (mCircleDiameter / 2), paint);
}
}
}