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/*
* Copyright (C) 2017 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 com.android.settings.widget;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.SeekBar;
public class DefaultIndicatorSeekBar extends SeekBar {
private int mDefaultProgress = -1;
public DefaultIndicatorSeekBar(Context context) {
super(context);
}
public DefaultIndicatorSeekBar(Context context, AttributeSet attrs) {
super(context, attrs);
}
public DefaultIndicatorSeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public DefaultIndicatorSeekBar(Context context, AttributeSet attrs, int defStyleAttr,
int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
/**
* N.B. Only draws the default indicator tick mark, NOT equally spaced tick marks.
*/
@Override
protected void drawTickMarks(Canvas canvas) {
if (isEnabled() && mDefaultProgress <= getMax() && mDefaultProgress >= getMin()) {
final Drawable defaultIndicator = getTickMark();
// Adjust the drawable's bounds to center it at the point where it's drawn.
final int w = defaultIndicator.getIntrinsicWidth();
final int h = defaultIndicator.getIntrinsicHeight();
final int halfW = w >= 0 ? w / 2 : 1;
final int halfH = h >= 0 ? h / 2 : 1;
defaultIndicator.setBounds(-halfW, -halfH, halfW, halfH);
// This mimics the computation of the thumb position, to get the true "default."
final int availableWidth = getWidth() - mPaddingLeft - mPaddingRight;
final int range = getMax() - getMin();
final float scale = range > 0f ? mDefaultProgress / (float) range : 0f;
final int offset = (int) ((scale * availableWidth) + 0.5f);
final int indicatorPosition = isLayoutRtl() && getMirrorForRtl()
? availableWidth - offset + mPaddingRight : offset + mPaddingLeft;
final int saveCount = canvas.save();
canvas.translate(indicatorPosition, getHeight() / 2);
defaultIndicator.draw(canvas);
canvas.restoreToCount(saveCount);
}
}
/**
* N.B. This sets the default *unadjusted* progress, i.e. in the SeekBar's [0 - max] terms.
*/
public void setDefaultProgress(int defaultProgress) {
if (mDefaultProgress != defaultProgress) {
mDefaultProgress = defaultProgress;
invalidate();
}
}
public int getDefaultProgress() {
return mDefaultProgress;
}
}
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