package com.yalantis.ucrop.view.widget;
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import android.annotation.TargetApi;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.Rect;
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import android.os.Build;
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import androidx.annotation.ColorInt;
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import androidx.core.content.ContextCompat;
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import android.util.AttributeSet;
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import android.view.MotionEvent;
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import android.view.View;
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import com.yalantis.ucrop.R;
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/**
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* Created by Oleksii Shliama (https://github.com/shliama).
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*/
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public class HorizontalProgressWheelView extends View {
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private final Rect mCanvasClipBounds = new Rect();
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private ScrollingListener mScrollingListener;
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private float mLastTouchedPosition;
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private Paint mProgressLinePaint;
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private int mProgressLineWidth, mProgressLineHeight;
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private int mProgressLineMargin;
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private boolean mScrollStarted;
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private float mTotalScrollDistance;
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private int mMiddleLineColor;
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public HorizontalProgressWheelView(Context context) {
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this(context, null);
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}
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public HorizontalProgressWheelView(Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public HorizontalProgressWheelView(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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init();
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}
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@TargetApi(Build.VERSION_CODES.LOLLIPOP)
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public HorizontalProgressWheelView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
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super(context, attrs, defStyleAttr, defStyleRes);
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}
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public void setScrollingListener(ScrollingListener scrollingListener) {
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mScrollingListener = scrollingListener;
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}
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public void setMiddleLineColor(@ColorInt int middleLineColor) {
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mMiddleLineColor = middleLineColor;
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invalidate();
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}
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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switch (event.getAction()) {
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case MotionEvent.ACTION_DOWN:
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mLastTouchedPosition = event.getX();
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break;
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case MotionEvent.ACTION_UP:
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if (mScrollingListener != null) {
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mScrollStarted = false;
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mScrollingListener.onScrollEnd();
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}
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break;
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case MotionEvent.ACTION_MOVE:
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float distance = event.getX() - mLastTouchedPosition;
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if (distance != 0) {
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if (!mScrollStarted) {
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mScrollStarted = true;
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if (mScrollingListener != null) {
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mScrollingListener.onScrollStart();
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}
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}
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onScrollEvent(event, distance);
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}
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break;
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}
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return true;
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}
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@Override
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protected void onDraw(Canvas canvas) {
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super.onDraw(canvas);
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canvas.getClipBounds(mCanvasClipBounds);
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int linesCount = mCanvasClipBounds.width() / (mProgressLineWidth + mProgressLineMargin);
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float deltaX = (mTotalScrollDistance) % (float) (mProgressLineMargin + mProgressLineWidth);
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mProgressLinePaint.setColor(getResources().getColor(R.color.ucrop_color_progress_wheel_line));
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for (int i = 0; i < linesCount; i++) {
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if (i < (linesCount / 4)) {
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mProgressLinePaint.setAlpha((int) (255 * (i / (float) (linesCount / 4))));
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} else if (i > (linesCount * 3 / 4)) {
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mProgressLinePaint.setAlpha((int) (255 * ((linesCount - i) / (float) (linesCount / 4))));
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} else {
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mProgressLinePaint.setAlpha(255);
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}
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canvas.drawLine(
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-deltaX + mCanvasClipBounds.left + i * (mProgressLineWidth + mProgressLineMargin),
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mCanvasClipBounds.centerY() - mProgressLineHeight / 4.0f,
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-deltaX + mCanvasClipBounds.left + i * (mProgressLineWidth + mProgressLineMargin),
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mCanvasClipBounds.centerY() + mProgressLineHeight / 4.0f, mProgressLinePaint);
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}
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mProgressLinePaint.setColor(mMiddleLineColor);
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canvas.drawLine(mCanvasClipBounds.centerX(), mCanvasClipBounds.centerY() - mProgressLineHeight / 2.0f, mCanvasClipBounds.centerX(), mCanvasClipBounds.centerY() + mProgressLineHeight / 2.0f, mProgressLinePaint);
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}
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private void onScrollEvent(MotionEvent event, float distance) {
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mTotalScrollDistance -= distance;
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postInvalidate();
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mLastTouchedPosition = event.getX();
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if (mScrollingListener != null) {
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mScrollingListener.onScroll(-distance, mTotalScrollDistance);
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}
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}
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private void init() {
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mMiddleLineColor = ContextCompat.getColor(getContext(), R.color.ucrop_color_progress_wheel_line);
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mProgressLineWidth = getContext().getResources().getDimensionPixelSize(R.dimen.ucrop_width_horizontal_wheel_progress_line);
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mProgressLineHeight = getContext().getResources().getDimensionPixelSize(R.dimen.ucrop_height_horizontal_wheel_progress_line);
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mProgressLineMargin = getContext().getResources().getDimensionPixelSize(R.dimen.ucrop_margin_horizontal_wheel_progress_line);
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mProgressLinePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
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mProgressLinePaint.setStyle(Paint.Style.STROKE);
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mProgressLinePaint.setStrokeWidth(mProgressLineWidth);
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}
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public interface ScrollingListener {
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void onScrollStart();
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void onScroll(float delta, float totalDistance);
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void onScrollEnd();
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}
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}
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