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163 changes: 163 additions & 0 deletions
163
gallerylib/src/main/java/hashim/gallerylib/util/HorizontalProgressWheelView.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,163 @@ | ||
| package hashim.gallerylib.util | ||
|
|
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| import android.annotation.TargetApi | ||
| import android.content.Context | ||
| import android.graphics.Canvas | ||
| import android.graphics.Paint | ||
| import android.graphics.Rect | ||
| import android.os.Build | ||
| import android.util.AttributeSet | ||
| import android.view.MotionEvent | ||
| import android.view.View | ||
| import android.widget.SeekBar | ||
| import androidx.annotation.ColorInt | ||
| import androidx.appcompat.widget.AppCompatSeekBar | ||
| import androidx.core.content.ContextCompat | ||
| import hashim.gallerylib.R | ||
|
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|
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| class HorizontalProgressWheelView : View { | ||
|
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| private val mCanvasClipBounds = Rect() | ||
|
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| private var mScrollingListener: ScrollingListener? = null | ||
| private var mLastTouchedPosition = 0f | ||
|
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| private var mProgressLinePaint: Paint? = null | ||
| private var mProgressMiddleLinePaint: Paint? = null | ||
| private var mProgressLineWidth = 0 | ||
| private var mProgressLineHeight: Int = 0 | ||
| private var mProgressLineMargin = 0 | ||
|
|
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| private var mScrollStarted = false | ||
| private var mTotalScrollDistance = 0f | ||
|
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| private var mMiddleLineColor = 0 | ||
|
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| constructor(context: Context) : super(context) { | ||
| init() | ||
| } | ||
|
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| constructor(context: Context, attrs: AttributeSet?) : super(context, attrs) { | ||
| init() | ||
| } | ||
|
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| constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super( | ||
| context, | ||
| attrs, | ||
| defStyleAttr | ||
| ) { | ||
| init() | ||
| } | ||
|
|
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| constructor( | ||
| context: Context, | ||
| attrs: AttributeSet, | ||
| defStyleAttr: Int, | ||
| defStyleRes: Int | ||
| ) : super(context, attrs, defStyleAttr) { | ||
| init() | ||
| } | ||
|
|
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| fun setScrollingListener(scrollingListener: ScrollingListener?) { | ||
| mScrollingListener = scrollingListener | ||
| } | ||
|
|
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| fun setMiddleLineColor(@ColorInt middleLineColor: Int) { | ||
| mMiddleLineColor = middleLineColor | ||
| mProgressMiddleLinePaint!!.color = mMiddleLineColor | ||
| invalidate() | ||
| } | ||
|
|
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| override fun onTouchEvent(event: MotionEvent): Boolean { | ||
| when (event.action) { | ||
| MotionEvent.ACTION_DOWN -> mLastTouchedPosition = event.x | ||
| MotionEvent.ACTION_UP -> if (mScrollingListener != null) { | ||
| mScrollStarted = false | ||
| mScrollingListener!!.onScrollEnd() | ||
| } | ||
|
|
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| MotionEvent.ACTION_MOVE -> { | ||
| val distance = event.x - mLastTouchedPosition | ||
| if (distance != 0f) { | ||
| if (!mScrollStarted) { | ||
| mScrollStarted = true | ||
| if (mScrollingListener != null) { | ||
| mScrollingListener!!.onScrollStart() | ||
| } | ||
| } | ||
| onScrollEvent(event, distance) | ||
| } | ||
| } | ||
| } | ||
| return true | ||
| } | ||
|
|
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| override fun onDraw(canvas: Canvas) { | ||
| super.onDraw(canvas) | ||
| canvas.getClipBounds(mCanvasClipBounds) | ||
| val linesCount = mCanvasClipBounds.width() / (mProgressLineWidth + mProgressLineMargin) | ||
| val deltaX = mTotalScrollDistance % (mProgressLineMargin + mProgressLineWidth).toFloat() | ||
| for (i in 0 until linesCount) { | ||
| if (i < linesCount / 4) { | ||
| mProgressLinePaint!!.alpha = (255 * (i / (linesCount / 4).toFloat())).toInt() | ||
| } else if (i > linesCount * 3 / 4) { | ||
| mProgressLinePaint!!.alpha = | ||
| (255 * ((linesCount - i) / (linesCount / 4).toFloat())).toInt() | ||
| } else { | ||
| mProgressLinePaint!!.alpha = 255 | ||
| } | ||
| canvas.drawLine( | ||
| -deltaX + mCanvasClipBounds.left + i * (mProgressLineWidth + mProgressLineMargin), | ||
| mCanvasClipBounds.centerY() - mProgressLineHeight / 4.0f, | ||
| -deltaX + mCanvasClipBounds.left + i * (mProgressLineWidth + mProgressLineMargin), | ||
| mCanvasClipBounds.centerY() + mProgressLineHeight / 4.0f, mProgressLinePaint!! | ||
| ) | ||
| } | ||
| canvas.drawLine( | ||
| mCanvasClipBounds.centerX().toFloat(), | ||
| mCanvasClipBounds.centerY() - mProgressLineHeight / 2.0f, | ||
| mCanvasClipBounds.centerX().toFloat(), | ||
| mCanvasClipBounds.centerY() + mProgressLineHeight / 2.0f, | ||
| mProgressMiddleLinePaint!! | ||
| ) | ||
| } | ||
|
|
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| private fun onScrollEvent(event: MotionEvent, distance: Float) { | ||
| mTotalScrollDistance -= distance | ||
| postInvalidate() | ||
| mLastTouchedPosition = event.x | ||
| if (mScrollingListener != null) { | ||
| mScrollingListener!!.onScroll(-distance, mTotalScrollDistance) | ||
| } | ||
| } | ||
|
|
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| private fun init() { | ||
| mMiddleLineColor = | ||
| ContextCompat.getColor(context, R.color.colorPrimaryDark) | ||
| mProgressLineWidth = | ||
| context.resources.getDimensionPixelSize(R.dimen.padding_2) | ||
| mProgressLineHeight = | ||
| context.resources.getDimensionPixelSize(R.dimen.padding_20) | ||
| mProgressLineMargin = | ||
| context.resources.getDimensionPixelSize(R.dimen.padding_10) | ||
| mProgressLinePaint = Paint(Paint.ANTI_ALIAS_FLAG) | ||
| mProgressLinePaint!!.style = Paint.Style.STROKE | ||
| mProgressLinePaint!!.strokeWidth = mProgressLineWidth.toFloat() | ||
| mProgressLinePaint!!.color = ContextCompat.getColor(context, R.color.gray_dark) | ||
| mProgressMiddleLinePaint = Paint(mProgressLinePaint) | ||
| mProgressMiddleLinePaint!!.color = mMiddleLineColor | ||
| mProgressMiddleLinePaint!!.strokeCap = Paint.Cap.ROUND | ||
| mProgressMiddleLinePaint!!.strokeWidth = | ||
| context.resources.getDimensionPixelSize(R.dimen.padding_4) | ||
| .toFloat() | ||
|
|
||
| } | ||
|
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| interface ScrollingListener { | ||
| fun onScrollStart() | ||
| fun onScroll(delta: Float, totalDistance: Float) | ||
| fun onScrollEnd() | ||
| } | ||
|
|
||
| } |
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