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/*
* Copyright (C) 2017 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.support.wear.widget;
import android.os.Bundle;
import android.preference.PreferenceFragment;
import android.support.wear.widget.SwipeDismissFrameLayout.Callback;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* {@link PreferenceFragment} that supports swipe-to-dismiss.
*
* <p>Unlike a regular PreferenceFragment, this Fragment has a solid color background using the
* background color from the theme. This allows the fragment to be layered on top of other
* fragments so that the previous layer is seen when this fragment is swiped away.
*/
public class SwipeDismissPreferenceFragment extends PreferenceFragment {
private SwipeDismissFrameLayout mSwipeLayout;
private final Callback mCallback =
new Callback() {
@Override
public void onSwipeStarted(SwipeDismissFrameLayout layout) {
SwipeDismissPreferenceFragment.this.onSwipeStart();
}
@Override
public void onSwipeCanceled(SwipeDismissFrameLayout layout) {
SwipeDismissPreferenceFragment.this.onSwipeCancelled();
}
@Override
public void onDismissed(SwipeDismissFrameLayout layout) {
SwipeDismissPreferenceFragment.this.onDismiss();
}
};
@Override
public View onCreateView(
LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
mSwipeLayout = new SwipeDismissFrameLayout(getActivity());
mSwipeLayout.addCallback(mCallback);
View contents = super.onCreateView(inflater, mSwipeLayout, savedInstanceState);
mSwipeLayout.setBackgroundColor(getBackgroundColor());
mSwipeLayout.addView(contents);
return mSwipeLayout;
}
/** Called when the fragment is dismissed with a swipe. */
public void onDismiss() {
}
/** Called when a swipe-to-dismiss gesture is started. */
public void onSwipeStart() {
}
/** Called when a swipe-to-dismiss gesture is cancelled. */
public void onSwipeCancelled() {
}
/**
* Sets whether or not the preferences list can be focused. If {@code focusable} is false, any
* existing focus will be cleared.
*/
public void setFocusable(boolean focusable) {
if (focusable) {
mSwipeLayout.setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS);
mSwipeLayout.setFocusable(true);
} else {
// Prevent any child views from receiving focus.
mSwipeLayout.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
mSwipeLayout.setFocusable(false);
mSwipeLayout.clearFocus();
}
}
private int getBackgroundColor() {
TypedValue value = new TypedValue();
getActivity().getTheme().resolveAttribute(android.R.attr.colorBackground, value, true);
return value.data;
}
}
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