| /* |
| * Copyright (C) 2007 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 android.widget; |
| |
| import android.annotation.FloatRange; |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.drawable.Drawable; |
| import android.graphics.drawable.LayerDrawable; |
| import android.util.AttributeSet; |
| import android.view.inspector.InspectableProperty; |
| |
| /** |
| * Displays checked/unchecked states as a button |
| * with a "light" indicator and by default accompanied with the text "ON" or "OFF". |
| * |
| * <p>See the <a href="{@docRoot}guide/topics/ui/controls/togglebutton.html">Toggle Buttons</a> |
| * guide.</p> |
| * |
| * @attr ref android.R.styleable#ToggleButton_textOn |
| * @attr ref android.R.styleable#ToggleButton_textOff |
| * @attr ref android.R.styleable#ToggleButton_disabledAlpha |
| */ |
| public class ToggleButton extends CompoundButton { |
| private CharSequence mTextOn; |
| private CharSequence mTextOff; |
| |
| private Drawable mIndicatorDrawable; |
| |
| private static final int NO_ALPHA = 0xFF; |
| private float mDisabledAlpha; |
| |
| public ToggleButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| |
| final TypedArray a = context.obtainStyledAttributes( |
| attrs, com.android.internal.R.styleable.ToggleButton, defStyleAttr, defStyleRes); |
| saveAttributeDataForStyleable(context, com.android.internal.R.styleable.ToggleButton, |
| attrs, a, defStyleAttr, defStyleRes); |
| mTextOn = a.getText(com.android.internal.R.styleable.ToggleButton_textOn); |
| mTextOff = a.getText(com.android.internal.R.styleable.ToggleButton_textOff); |
| mDisabledAlpha = a.getFloat(com.android.internal.R.styleable.ToggleButton_disabledAlpha, 0.5f); |
| syncTextState(); |
| a.recycle(); |
| } |
| |
| public ToggleButton(Context context, AttributeSet attrs, int defStyleAttr) { |
| this(context, attrs, defStyleAttr, 0); |
| } |
| |
| public ToggleButton(Context context, AttributeSet attrs) { |
| this(context, attrs, com.android.internal.R.attr.buttonStyleToggle); |
| } |
| |
| public ToggleButton(Context context) { |
| this(context, null); |
| } |
| |
| @Override |
| public void setChecked(boolean checked) { |
| super.setChecked(checked); |
| |
| syncTextState(); |
| } |
| |
| private void syncTextState() { |
| boolean checked = isChecked(); |
| if (checked && mTextOn != null) { |
| setText(mTextOn); |
| } else if (!checked && mTextOff != null) { |
| setText(mTextOff); |
| } |
| } |
| |
| /** |
| * Returns the text for when the button is in the checked state. |
| * |
| * @return The text. |
| */ |
| @InspectableProperty |
| public CharSequence getTextOn() { |
| return mTextOn; |
| } |
| |
| /** |
| * Sets the text for when the button is in the checked state. |
| * |
| * @param textOn The text. |
| */ |
| public void setTextOn(CharSequence textOn) { |
| mTextOn = textOn; |
| } |
| |
| /** |
| * Returns the text for when the button is not in the checked state. |
| * |
| * @return The text. |
| */ |
| @InspectableProperty |
| public CharSequence getTextOff() { |
| return mTextOff; |
| } |
| |
| /** |
| * Sets the text for when the button is not in the checked state. |
| * |
| * @param textOff The text. |
| */ |
| public void setTextOff(CharSequence textOff) { |
| mTextOff = textOff; |
| } |
| |
| /** |
| * Returns the alpha value of the button when it is disabled |
| * |
| * @return the alpha value, 0.0-1.0 |
| */ |
| @InspectableProperty |
| @FloatRange(from = 0.0, to = 1.0) |
| public float getDisabledAlpha() { |
| return mDisabledAlpha; |
| } |
| |
| @Override |
| protected void onFinishInflate() { |
| super.onFinishInflate(); |
| |
| updateReferenceToIndicatorDrawable(getBackground()); |
| } |
| |
| @Override |
| public void setBackgroundDrawable(Drawable d) { |
| super.setBackgroundDrawable(d); |
| |
| updateReferenceToIndicatorDrawable(d); |
| } |
| |
| private void updateReferenceToIndicatorDrawable(Drawable backgroundDrawable) { |
| if (backgroundDrawable instanceof LayerDrawable) { |
| LayerDrawable layerDrawable = (LayerDrawable) backgroundDrawable; |
| mIndicatorDrawable = |
| layerDrawable.findDrawableByLayerId(com.android.internal.R.id.toggle); |
| } else { |
| mIndicatorDrawable = null; |
| } |
| } |
| |
| @Override |
| protected void drawableStateChanged() { |
| super.drawableStateChanged(); |
| |
| if (mIndicatorDrawable != null) { |
| mIndicatorDrawable.setAlpha(isEnabled() ? NO_ALPHA : (int) (NO_ALPHA * mDisabledAlpha)); |
| } |
| } |
| |
| @Override |
| public CharSequence getAccessibilityClassName() { |
| return ToggleButton.class.getName(); |
| } |
| } |