/
AdaptiveSupportingPanelDemoFragment.java
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/
AdaptiveSupportingPanelDemoFragment.java
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/*
* Copyright 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
*
* https://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 io.material.catalog.adaptive;
import io.material.catalog.R;
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.constraintlayout.widget.ConstraintSet;
import androidx.constraintlayout.widget.ReactiveGuide;
import androidx.core.view.ViewCompat;
/** A Fragment that hosts a supporting panel demo. */
public class AdaptiveSupportingPanelDemoFragment extends Fragment {
private ConstraintLayout fragmentContainer;
private ConstraintSet portraitLayout;
private ConstraintSet landscapeLayout;
private ReactiveGuide guideline;
@Nullable
@Override
public View onCreateView(
@NonNull LayoutInflater layoutInflater,
@Nullable ViewGroup viewGroup,
@Nullable Bundle bundle) {
View view =
layoutInflater.inflate(R.layout.cat_adaptive_supporting_panel_fragment, viewGroup, false);
guideline = view.findViewById(R.id.horizontal_fold);
RecyclerView supportingPanelList = view.findViewById(R.id.supporting_panel_side_container);
RecyclerView.LayoutManager layoutManager =
new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false);
supportingPanelList.setLayoutManager(layoutManager);
PanelAdapter adapter = new PanelAdapter();
supportingPanelList.setAdapter(adapter);
ViewCompat.setNestedScrollingEnabled(supportingPanelList, /* enabled= */ false);
// Set up constraint sets.
fragmentContainer = view.findViewById(R.id.supporting_panel_container);
portraitLayout = new ConstraintSet();
portraitLayout.clone(fragmentContainer);
landscapeLayout = getLandscapeLayout(fragmentContainer);
return view;
}
/* Applies the portrait layout configuration. */
void updatePortraitLayout() {
portraitLayout.applyTo(fragmentContainer);
}
/* Applies the landscape layout configuration. */
void updateLandscapeLayout() {
landscapeLayout.applyTo(fragmentContainer);
}
/**
* Applies the table top layout configuration.
*
* @param foldPosition position of the fold
* @param foldWidth width of the fold if it's a hinge
*/
void updateTableTopLayout(int foldPosition, int foldWidth) {
ConstraintSet tableTopLayout = getTableTopLayout(portraitLayout, foldWidth);
tableTopLayout.applyTo(fragmentContainer);
guideline.setGuidelineBegin(foldPosition);
}
/* Returns the constraint set to be used for the landscape layout configuration. */
private ConstraintSet getLandscapeLayout(@NonNull ConstraintLayout constraintLayout) {
int marginVertical =
getResources().getDimensionPixelOffset(R.dimen.cat_adaptive_margin_vertical);
int marginHorizontal =
getResources().getDimensionPixelOffset(R.dimen.cat_adaptive_margin_horizontal);
ConstraintSet constraintSet = new ConstraintSet();
constraintSet.clone(constraintLayout);
// Main content.
constraintSet.connect(
R.id.supporting_panel_main_content,
ConstraintSet.END,
R.id.supporting_panel_side_container,
ConstraintSet.START);
constraintSet.connect(
R.id.supporting_panel_main_content,
ConstraintSet.BOTTOM,
ConstraintSet.PARENT_ID,
ConstraintSet.BOTTOM);
constraintSet.setMargin(R.id.supporting_panel_main_content, ConstraintSet.TOP, marginVertical);
constraintSet.setMargin(
R.id.supporting_panel_main_content, ConstraintSet.BOTTOM, marginVertical);
constraintSet.setMargin(
R.id.supporting_panel_main_content, ConstraintSet.END, marginHorizontal);
constraintSet.constrainMinHeight(R.id.supporting_panel_main_content, 0);
// Supporting panel content.
constraintSet.connect(
R.id.supporting_panel_side_container,
ConstraintSet.TOP,
ConstraintSet.PARENT_ID,
ConstraintSet.TOP);
constraintSet.connect(
R.id.supporting_panel_side_container,
ConstraintSet.START,
R.id.supporting_panel_main_content,
ConstraintSet.END);
constraintSet.constrainPercentWidth(R.id.supporting_panel_side_container, 0.4f);
return constraintSet;
}
/* Returns the constraint set to be used for the table top layout configuration. */
private ConstraintSet getTableTopLayout(@NonNull ConstraintSet portraitLayout, int foldWidth) {
int marginVertical =
getResources().getDimensionPixelOffset(R.dimen.cat_adaptive_margin_vertical);
ConstraintSet constraintSet = new ConstraintSet();
constraintSet.clone(portraitLayout);
constraintSet.setVisibility(R.id.horizontal_fold, View.VISIBLE);
// Main content
constraintSet.connect(
R.id.supporting_panel_main_content,
ConstraintSet.BOTTOM,
R.id.horizontal_fold,
ConstraintSet.TOP);
constraintSet.setMargin(
R.id.supporting_panel_main_content, ConstraintSet.BOTTOM, marginVertical);
constraintSet.constrainMinHeight(R.id.supporting_panel_main_content, 0);
// Supporting panel content
constraintSet.connect(
R.id.supporting_panel_side_container,
ConstraintSet.TOP,
R.id.horizontal_fold,
ConstraintSet.BOTTOM,
marginVertical + foldWidth);
return constraintSet;
}
/** A RecyclerView adapter for the side content list of the supporting panel demo. */
private static final class PanelAdapter
extends RecyclerView.Adapter<PanelAdapter.PanelViewHolder> {
PanelAdapter() {}
/** Provides a reference to the views for each data item. */
static class PanelViewHolder extends RecyclerView.ViewHolder {
public PanelViewHolder(@NonNull View view) {
super(view);
}
}
@NonNull
@Override
public PanelViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view =
LayoutInflater.from(parent.getContext())
.inflate(R.layout.cat_adaptive_supporting_panel_item, parent, false);
return new PanelViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull PanelViewHolder holder, int position) {
// Populate content. Empty for demo purposes.
}
@Override
public int getItemCount() {
return 10;
}
}
}