/
MaterialCheckBox.java
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/
MaterialCheckBox.java
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/*
* Copyright (C) 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 com.google.android.material.checkbox;
import com.google.android.material.R;
import static com.google.android.material.theme.overlay.MaterialThemeOverlay.wrap;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.TypedArray;
import androidx.appcompat.widget.AppCompatCheckBox;
import android.util.AttributeSet;
import androidx.annotation.Nullable;
import androidx.core.widget.CompoundButtonCompat;
import com.google.android.material.color.MaterialColors;
import com.google.android.material.internal.ThemeEnforcement;
import com.google.android.material.resources.MaterialResources;
/**
* A class that creates a Material Themed CheckBox.
*
* <p>This class uses attributes from the Material Theme to style a CheckBox. Excepting color
* changes, it behaves identically to {@link AppCompatCheckBox}. Your theme's {@code
* ?attr/colorControlActivated}, {@code ?attr/colorSurface}, and {@code ?attr/colorOnSurface} must
* be set.
*/
public class MaterialCheckBox extends AppCompatCheckBox {
private static final int DEF_STYLE_RES =
R.style.Widget_MaterialComponents_CompoundButton_CheckBox;
private static final int[][] ENABLED_CHECKED_STATES =
new int[][] {
new int[] {android.R.attr.state_enabled, android.R.attr.state_checked}, // [0]
new int[] {android.R.attr.state_enabled, -android.R.attr.state_checked}, // [1]
new int[] {-android.R.attr.state_enabled, android.R.attr.state_checked}, // [2]
new int[] {-android.R.attr.state_enabled, -android.R.attr.state_checked} // [3]
};
@Nullable private ColorStateList materialThemeColorsTintList;
private boolean useMaterialThemeColors;
public MaterialCheckBox(Context context) {
this(context, null);
}
public MaterialCheckBox(Context context, @Nullable AttributeSet attrs) {
this(context, attrs, R.attr.checkboxStyle);
}
public MaterialCheckBox(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(wrap(context, attrs, defStyleAttr, DEF_STYLE_RES), attrs, defStyleAttr);
// Ensure we are using the correctly themed context rather than the context that was passed in.
context = getContext();
TypedArray attributes =
ThemeEnforcement.obtainStyledAttributes(
context, attrs, R.styleable.MaterialCheckBox, defStyleAttr, DEF_STYLE_RES);
// If buttonTint is specified, read it using MaterialResources to allow themeable attributes in
// all API levels.
if (attributes.hasValue(R.styleable.MaterialCheckBox_buttonTint)) {
CompoundButtonCompat.setButtonTintList(
this,
MaterialResources.getColorStateList(
context, attributes, R.styleable.MaterialCheckBox_buttonTint));
}
useMaterialThemeColors =
attributes.getBoolean(R.styleable.MaterialCheckBox_useMaterialThemeColors, false);
attributes.recycle();
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
if (useMaterialThemeColors && CompoundButtonCompat.getButtonTintList(this) == null) {
setUseMaterialThemeColors(true);
}
}
/**
* Forces the {@link MaterialCheckBox} to use colors from a Material Theme. Overrides any
* specified ButtonTintList. If set to false, sets the tints to null. Use {@link
* MaterialCheckBox#setSupportButtonTintList} to change button tints.
*/
public void setUseMaterialThemeColors(boolean useMaterialThemeColors) {
this.useMaterialThemeColors = useMaterialThemeColors;
if (useMaterialThemeColors) {
CompoundButtonCompat.setButtonTintList(this, getMaterialThemeColorsTintList());
} else {
CompoundButtonCompat.setButtonTintList(this, null);
}
}
/** Returns true if this {@link MaterialCheckBox} defaults to colors from a Material Theme. */
public boolean isUseMaterialThemeColors() {
return useMaterialThemeColors;
}
private ColorStateList getMaterialThemeColorsTintList() {
if (materialThemeColorsTintList == null) {
int[] checkBoxColorsList = new int[ENABLED_CHECKED_STATES.length];
int colorControlActivated = MaterialColors.getColor(this, R.attr.colorControlActivated);
int colorSurface = MaterialColors.getColor(this, R.attr.colorSurface);
int colorOnSurface = MaterialColors.getColor(this, R.attr.colorOnSurface);
checkBoxColorsList[0] =
MaterialColors.layer(colorSurface, colorControlActivated, MaterialColors.ALPHA_FULL);
checkBoxColorsList[1] =
MaterialColors.layer(colorSurface, colorOnSurface, MaterialColors.ALPHA_MEDIUM);
checkBoxColorsList[2] =
MaterialColors.layer(colorSurface, colorOnSurface, MaterialColors.ALPHA_DISABLED);
checkBoxColorsList[3] =
MaterialColors.layer(colorSurface, colorOnSurface, MaterialColors.ALPHA_DISABLED);
materialThemeColorsTintList = new ColorStateList(ENABLED_CHECKED_STATES, checkBoxColorsList);
}
return materialThemeColorsTintList;
}
}