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/*
* Copyright (C) 2015 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.tv.common.ui.setup;
import static android.content.Context.ACCESSIBILITY_SERVICE;
import android.os.Bundle;
import android.support.v17.leanback.app.GuidedStepFragment;
import android.support.v17.leanback.widget.GuidanceStylist;
import android.support.v17.leanback.widget.GuidedAction;
import android.support.v17.leanback.widget.GuidedActionsStylist;
import android.support.v17.leanback.widget.VerticalGridView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.AccessibilityDelegate;
import android.view.ViewGroup;
import android.view.ViewGroup.MarginLayoutParams;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityManager;
import android.view.accessibility.AccessibilityNodeInfo;
import android.widget.LinearLayout;
import com.android.tv.common.R;
/** A fragment for channel source info/setup. */
public abstract class SetupGuidedStepFragment extends GuidedStepFragment {
/**
* Key of the argument which indicate whether the parent of this fragment has three panes.
*
* <p>Value type: boolean
*/
public static final String KEY_THREE_PANE = "key_three_pane";
private View mContentFragment;
private boolean mFromContentFragment;
private boolean mAccessibilityMode;
@Override
public View onCreateView(
LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = super.onCreateView(inflater, container, savedInstanceState);
Bundle arguments = getArguments();
view.findViewById(android.support.v17.leanback.R.id.action_fragment_root)
.setPadding(0, 0, 0, 0);
mContentFragment = view.findViewById(android.support.v17.leanback.R.id.content_fragment);
LinearLayout.LayoutParams guidanceLayoutParams =
(LinearLayout.LayoutParams) mContentFragment.getLayoutParams();
guidanceLayoutParams.weight = 0;
if (arguments != null && arguments.getBoolean(KEY_THREE_PANE, false)) {
// Content fragment.
guidanceLayoutParams.width =
getResources()
.getDimensionPixelOffset(
R.dimen.setup_guidedstep_guidance_section_width_3pane);
int doneButtonWidth =
getResources()
.getDimensionPixelOffset(R.dimen.setup_done_button_container_width);
// Guided actions list
View list = view.findViewById(android.support.v17.leanback.R.id.guidedactions_list);
MarginLayoutParams marginLayoutParams = (MarginLayoutParams) list.getLayoutParams();
// Use content view to check layout direction while view is being created.
if (getResources().getConfiguration().getLayoutDirection()
== View.LAYOUT_DIRECTION_LTR) {
marginLayoutParams.rightMargin = doneButtonWidth;
} else {
marginLayoutParams.leftMargin = doneButtonWidth;
}
} else {
// Content fragment.
guidanceLayoutParams.width =
getResources()
.getDimensionPixelOffset(
R.dimen.setup_guidedstep_guidance_section_width_2pane);
}
// gridView Alignment
VerticalGridView gridView = getGuidedActionsStylist().getActionsGridView();
int offset =
getResources()
.getDimensionPixelOffset(R.dimen.setup_guidedactions_selector_margin_top);
gridView.setWindowAlignmentOffset(offset);
gridView.setWindowAlignmentOffsetPercent(0);
gridView.setItemAlignmentOffsetPercent(0);
((ViewGroup) view.findViewById(android.support.v17.leanback.R.id.guidedactions_list))
.setTransitionGroup(false);
// Needed for the shared element transition.
// content_frame is defined in leanback.
ViewGroup group =
(ViewGroup) view.findViewById(android.support.v17.leanback.R.id.content_frame);
group.setClipChildren(false);
group.setClipToPadding(false);
return view;
}
@Override
public GuidedActionsStylist onCreateActionsStylist() {
return new SetupGuidedStepFragmentGuidedActionsStylist();
}
@Override
public void onResume() {
super.onResume();
AccessibilityManager am =
(AccessibilityManager) getActivity().getSystemService(ACCESSIBILITY_SERVICE);
mAccessibilityMode = am != null && am.isEnabled() && am.isTouchExplorationEnabled();
mContentFragment.setFocusable(mAccessibilityMode);
if (mAccessibilityMode) {
mContentFragment.setAccessibilityDelegate(
new AccessibilityDelegate() {
@Override
public boolean performAccessibilityAction(View host, int action, Bundle args) {
if (action == AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS
&& !getActions().isEmpty()) {
// scroll to the top. This makes the first action view on the screen.
// Otherwise, the view can be recycled, so accessibility events cannot
// be sent later.
getGuidedActionsStylist().getActionsGridView().scrollToPosition(0);
mFromContentFragment = true;
}
return super.performAccessibilityAction(host, action, args);
}
});
mContentFragment.requestFocus();
}
}
@Override
public GuidanceStylist onCreateGuidanceStylist() {
return new GuidanceStylist() {
@Override
public View onCreateView(
LayoutInflater inflater, ViewGroup container, Guidance guidance) {
View view = super.onCreateView(inflater, container, guidance);
if (guidance.getIconDrawable() == null) {
// Icon view should not take up space when we don't use image.
getIconView().setVisibility(View.GONE);
}
return view;
}
};
}
protected abstract String getActionCategory();
protected View getDoneButton() {
return getActivity().findViewById(R.id.button_done);
}
@Override
public void onGuidedActionClicked(GuidedAction action) {
if (!action.isFocusable()) {
// an unfocusable action may be clicked in accessibility mode when it's accessibility
// focused
return;
}
SetupActionHelper.onActionClick(this, getActionCategory(), (int) action.getId());
}
@Override
protected void onProvideFragmentTransitions() {
// Don't use the fragment transition defined in GuidedStepFragment.
}
@Override
public boolean isFocusOutEndAllowed() {
return true;
}
protected void setAccessibilityDelegate(GuidedActionsStylist.ViewHolder vh,
GuidedAction action) {
if (!mAccessibilityMode || findActionPositionById(action.getId()) == 0) {
return;
}
vh.itemView.setAccessibilityDelegate(
new AccessibilityDelegate() {
@Override
public boolean performAccessibilityAction(View host, int action, Bundle args) {
if ((action == AccessibilityNodeInfo.ACTION_FOCUS
|| action == AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS)
&& mFromContentFragment) {
// block the action and make the first action view accessibility focused
View view = getActionItemView(0);
if (view != null) {
view.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED);
mFromContentFragment = false;
return true;
}
}
return super.performAccessibilityAction(host, action, args);
}
});
}
private class SetupGuidedStepFragmentGuidedActionsStylist extends GuidedActionsStylist {
@Override
public void onBindViewHolder(GuidedActionsStylist.ViewHolder vh, GuidedAction action) {
super.onBindViewHolder(vh, action);
setAccessibilityDelegate(vh, action);
}
}
}
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