fd3911ba29
This slider is temporary and will be replaced by the final UI in the next couple weeks. In this first version, the slider is added in Settings -> Accessibility -> Color and motion. It is discrete with three values. The slider manipulates the setting currently named CONTRAST_LEVEL in Settings.Secure. This setting is ranging from [-1, 1] with a default value of 0. However, the three values of the slider correspond to the contrast values [0, 0.5, 1] respectively Test: Manual: put a log before Settings.System.putFloatForUser, move the slider manually and verify the logs Test: make RunSettingsRoboTests ROBOTEST_FILTER=ContrastLevelSeekBar Bug: 259091608 Change-Id: I2eaf751d6008ad20b3564dde2c0f4648cc6c8178
119 lines
4.5 KiB
Java
119 lines
4.5 KiB
Java
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings.accessibility;
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import static android.view.HapticFeedbackConstants.CLOCK_TICK;
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import static com.android.settings.Utils.isNightMode;
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import static com.android.settings.accessibility.ContrastLevelSeekBarPreference.CONTRAST_SLIDER_TICKS;
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import android.content.Context;
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import android.content.res.ColorStateList;
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import android.content.res.Resources;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Paint;
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import android.graphics.Rect;
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import android.os.UserHandle;
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import android.provider.Settings;
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import android.util.AttributeSet;
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import android.widget.SeekBar;
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import com.android.settings.R;
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/**
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* A custom seekbar for the contrast level setting.
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*
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* Adds a center line indicator between left and right, which snaps to if close.
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* Updates the Settings.Secure.CONTRAST_LEVEL setting on progress changed.
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*
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* TODO(b/266071578): remove this class and replace this with the final UI
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*/
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public class ContrastLevelSeekBar extends SeekBar {
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private final Context mContext;
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private int mLastProgress = -1;
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private final Paint mMarkerPaint;
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private final Rect mMarkerRect;
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private final OnSeekBarChangeListener mProxySeekBarListener = new OnSeekBarChangeListener() {
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@Override
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public void onStopTrackingTouch(SeekBar seekBar) { }
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@Override
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public void onStartTrackingTouch(SeekBar seekBar) { }
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@Override
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public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
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if (!fromUser || progress == mLastProgress) return;
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seekBar.performHapticFeedback(CLOCK_TICK);
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mLastProgress = progress;
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// rescale progress from [0, 1, 2] to [0, 0.5, 1]
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final float contrastLevel = (float) progress / CONTRAST_SLIDER_TICKS;
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Settings.Secure.putFloatForUser(mContext.getContentResolver(),
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Settings.Secure.CONTRAST_LEVEL, contrastLevel, UserHandle.USER_CURRENT);
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}
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};
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public ContrastLevelSeekBar(Context context, AttributeSet attrs) {
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this(context, attrs, com.android.internal.R.attr.seekBarStyle);
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}
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public ContrastLevelSeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
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this(context, attrs, defStyleAttr, 0 /* defStyleRes */);
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}
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public ContrastLevelSeekBar(
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Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
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super(context, attrs, defStyleAttr, defStyleRes);
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mContext = context;
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Resources res = getResources();
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mMarkerRect = new Rect(0 /* left */, 0 /* top */,
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res.getDimensionPixelSize(R.dimen.contrast_level_seekbar_center_marker_width),
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res.getDimensionPixelSize(R.dimen.contrast_level_seekbar_center_marker_height));
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mMarkerPaint = new Paint();
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// the might be a better colour for the markers, but this slider is temporary anyway
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mMarkerPaint.setColor(isNightMode(context) ? Color.WHITE : Color.BLACK);
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mMarkerPaint.setStyle(Paint.Style.FILL);
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// Remove the progress colour
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setProgressTintList(ColorStateList.valueOf(Color.TRANSPARENT));
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super.setOnSeekBarChangeListener(mProxySeekBarListener);
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}
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@Override
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public void setOnSeekBarChangeListener(OnSeekBarChangeListener listener) { }
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// Note: the superclass AbsSeekBar.onDraw is synchronized.
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@Override
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protected synchronized void onDraw(Canvas canvas) {
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// Draw a marker at the center of the seekbar
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int seekBarCenter = (getHeight() - getPaddingBottom()) / 2;
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float sliderWidth = getWidth() - mMarkerRect.right - getPaddingEnd();
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canvas.save();
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canvas.translate(sliderWidth / 2f,
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seekBarCenter - (mMarkerRect.bottom / 2f));
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canvas.drawRect(mMarkerRect, mMarkerPaint);
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canvas.restore();
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super.onDraw(canvas);
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}
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}
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