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package de.danoeh.antennapod.view;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Handler;
import android.os.Looper;
import android.util.AttributeSet;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.ui.common.ThemeUtils;
public class ChapterSeekBar extends androidx.appcompat.widget.AppCompatSeekBar {
private float top;
private float width;
private float center;
private float bottom;
private float density;
private float progressPrimary;
private float progressSecondary;
private float[] dividerPos;
private boolean isHighlighted = false;
private final Paint paintBackground = new Paint();
private final Paint paintProgressPrimary = new Paint();
public ChapterSeekBar(Context context) {
super(context);
init(context);
}
public ChapterSeekBar(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public ChapterSeekBar(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context);
}
private void init(Context context) {
setBackground(null); // Removes the thumb shadow
dividerPos = null;
density = context.getResources().getDisplayMetrics().density;
paintBackground.setColor(ThemeUtils.getColorFromAttr(getContext(), R.attr.colorSurfaceVariant));
paintBackground.setAlpha(128);
paintProgressPrimary.setColor(ThemeUtils.getColorFromAttr(getContext(), R.attr.colorPrimary));
}
/**
* Sets the relative positions of the chapter dividers.
* @param dividerPos of the chapter dividers relative to the duration of the media.
*/
public void setDividerPos(final float[] dividerPos) {
if (dividerPos != null) {
this.dividerPos = new float[dividerPos.length + 2];
this.dividerPos[0] = 0;
System.arraycopy(dividerPos, 0, this.dividerPos, 1, dividerPos.length);
this.dividerPos[this.dividerPos.length - 1] = 1;
} else {
this.dividerPos = null;
}
invalidate();
}
public void highlightCurrentChapter() {
isHighlighted = true;
new Handler(Looper.getMainLooper()).postDelayed(new Runnable() {
@Override
public void run() {
isHighlighted = false;
invalidate();
}
}, 1000);
}
@Override
protected synchronized void onDraw(Canvas canvas) {
center = (getBottom() - getPaddingBottom() - getTop() - getPaddingTop()) / 2.0f;
top = center - density * 1.5f;
bottom = center + density * 1.5f;
width = (float) (getRight() - getPaddingRight() - getLeft() - getPaddingLeft());
progressSecondary = getSecondaryProgress() / (float) getMax() * width;
progressPrimary = getProgress() / (float) getMax() * width;
if (dividerPos == null) {
drawProgress(canvas);
} else {
drawProgressChapters(canvas);
}
drawThumb(canvas);
}
private void drawProgress(Canvas canvas) {
final int saveCount = canvas.save();
canvas.translate(getPaddingLeft(), getPaddingTop());
canvas.drawRect(0, top, width, bottom, paintBackground);
canvas.drawRect(0, top, progressSecondary, bottom, paintBackground);
canvas.drawRect(0, top, progressPrimary, bottom, paintProgressPrimary);
canvas.restoreToCount(saveCount);
}
private void drawProgressChapters(Canvas canvas) {
final int saveCount = canvas.save();
int currChapter = 1;
float chapterMargin = density * 1.2f;
float topExpanded = center - density * 2.0f;
float bottomExpanded = center + density * 2.0f;
canvas.translate(getPaddingLeft(), getPaddingTop());
for (int i = 1; i < dividerPos.length; i++) {
float right = dividerPos[i] * width - chapterMargin;
float left = dividerPos[i - 1] * width;
float rightCurr = dividerPos[currChapter] * width - chapterMargin;
float leftCurr = dividerPos[currChapter - 1] * width;
canvas.drawRect(left, top, right, bottom, paintBackground);
if (progressSecondary > 0 && progressSecondary < width) {
if (right < progressSecondary) {
canvas.drawRect(left, top, right, bottom, paintBackground);
} else if (progressSecondary > left) {
canvas.drawRect(left, top, progressSecondary, bottom, paintBackground);
}
}
if (right < progressPrimary) {
currChapter = i + 1;
canvas.drawRect(left, top, right, bottom, paintProgressPrimary);
} else if (isHighlighted || isPressed()) {
canvas.drawRect(leftCurr, topExpanded, rightCurr, bottomExpanded, paintBackground);
canvas.drawRect(leftCurr, topExpanded, progressPrimary, bottomExpanded, paintProgressPrimary);
} else {
canvas.drawRect(leftCurr, top, progressPrimary, bottom, paintProgressPrimary);
}
}
canvas.restoreToCount(saveCount);
}
private void drawThumb(Canvas canvas) {
final int saveCount = canvas.save();
canvas.translate(getPaddingLeft() - getThumbOffset(), getPaddingTop());
getThumb().draw(canvas);
canvas.restoreToCount(saveCount);
}
}
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