| /* |
| * 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; |
| } |
| } |