| /* |
| * Copyright 2018 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 androidx.mediarouter.app; |
| |
| import android.content.Context; |
| import android.graphics.Color; |
| import android.graphics.PorterDuff; |
| import android.graphics.drawable.Drawable; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| |
| import androidx.appcompat.widget.AppCompatSeekBar; |
| |
| /** |
| * Volume slider with showing, hiding, and applying alpha supports to the thumb. |
| */ |
| class MediaRouteVolumeSlider extends AppCompatSeekBar { |
| private static final String TAG = "MediaRouteVolumeSlider"; |
| |
| private final float mDisabledAlpha; |
| |
| private boolean mHideThumb; |
| private Drawable mThumb; |
| private int mColor; |
| |
| public MediaRouteVolumeSlider(Context context) { |
| this(context, null); |
| } |
| |
| public MediaRouteVolumeSlider(Context context, AttributeSet attrs) { |
| this(context, attrs, androidx.appcompat.R.attr.seekBarStyle); |
| } |
| |
| public MediaRouteVolumeSlider(Context context, AttributeSet attrs, int defStyleAttr) { |
| super(context, attrs, defStyleAttr); |
| mDisabledAlpha = MediaRouterThemeHelper.getDisabledAlpha(context); |
| } |
| |
| @Override |
| protected void drawableStateChanged() { |
| super.drawableStateChanged(); |
| int alpha = isEnabled() ? 0xFF : (int) (0xFF * mDisabledAlpha); |
| |
| // The thumb drawable is a collection of drawables and its current drawables are changed per |
| // state. Apply the color filter and alpha on every state change. |
| mThumb.setColorFilter(mColor, PorterDuff.Mode.SRC_IN); |
| mThumb.setAlpha(alpha); |
| |
| getProgressDrawable().setColorFilter(mColor, PorterDuff.Mode.SRC_IN); |
| getProgressDrawable().setAlpha(alpha); |
| } |
| |
| @Override |
| public void setThumb(Drawable thumb) { |
| mThumb = thumb; |
| super.setThumb(mHideThumb ? null : mThumb); |
| } |
| |
| /** |
| * Sets whether to show or hide thumb. |
| */ |
| public void setHideThumb(boolean hideThumb) { |
| if (mHideThumb == hideThumb) { |
| return; |
| } |
| mHideThumb = hideThumb; |
| super.setThumb(mHideThumb ? null : mThumb); |
| } |
| |
| /** |
| * Sets the volume slider color. The change takes effect next time drawable state is changed. |
| * <p> |
| * The color cannot be translucent, otherwise the underlying progress bar will be seen through |
| * the thumb. |
| * </p> |
| */ |
| public void setColor(int color) { |
| if (mColor == color) { |
| return; |
| } |
| if (Color.alpha(color) != 0xFF) { |
| Log.e(TAG, "Volume slider color cannot be translucent: #" + Integer.toHexString(color)); |
| } |
| mColor = color; |
| } |
| } |