69 lines
2.3 KiB
Java
69 lines
2.3 KiB
Java
/*
|
|
* Copyright (C) 2021 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.internal.widget;
|
|
|
|
import android.annotation.Nullable;
|
|
import android.content.Context;
|
|
import android.graphics.ColorMatrix;
|
|
import android.graphics.ColorMatrixColorFilter;
|
|
import android.util.AttributeSet;
|
|
import android.widget.ImageView;
|
|
import android.widget.RemoteViews;
|
|
|
|
/**
|
|
* ImageView which applies a saturation image filter, used by AppWidgets to represent disabled icon
|
|
*/
|
|
@RemoteViews.RemoteView
|
|
public class DisableImageView extends ImageView {
|
|
|
|
public DisableImageView(Context context) {
|
|
this(context, null, 0, 0);
|
|
}
|
|
|
|
public DisableImageView(Context context, @Nullable AttributeSet attrs) {
|
|
this(context, attrs, 0, 0);
|
|
}
|
|
|
|
public DisableImageView(Context context, @Nullable AttributeSet attrs,
|
|
int defStyleAttr) {
|
|
this(context, attrs, defStyleAttr, 0);
|
|
}
|
|
|
|
public DisableImageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr,
|
|
int defStyleRes) {
|
|
super(context, attrs, defStyleAttr, defStyleRes);
|
|
|
|
// Apply the disabled filter
|
|
ColorMatrix brightnessMatrix = new ColorMatrix();
|
|
float brightnessF = 0.5f;
|
|
int brightnessI = (int) (255 * brightnessF);
|
|
// Brightness: C-new = C-old*(1-amount) + amount
|
|
float scale = 1f - brightnessF;
|
|
float[] mat = brightnessMatrix.getArray();
|
|
mat[0] = scale;
|
|
mat[6] = scale;
|
|
mat[12] = scale;
|
|
mat[4] = brightnessI;
|
|
mat[9] = brightnessI;
|
|
mat[14] = brightnessI;
|
|
|
|
ColorMatrix filterMatrix = new ColorMatrix();
|
|
filterMatrix.setSaturation(0);
|
|
filterMatrix.preConcat(brightnessMatrix);
|
|
setColorFilter(new ColorMatrixColorFilter(filterMatrix));
|
|
}
|
|
}
|