ExamplesActivity.java

/*******************************************************************************
 * Copyright 2012 Steven Rudenko
 * 
 * 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 sample.actionscontentview;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;

import sample.actionscontentview.adapter.ActionsAdapter;
import sample.actionscontentview.fragment.AboutFragment;
import sample.actionscontentview.fragment.SandboxFragment;
import sample.actionscontentview.fragment.WebViewFragment;
import shared.ui.actionscontentview.ActionsContentView;

public class ExamplesActivity extends FragmentActivity {

  private static final String STATE_URI = "state:uri";
  private static final String STATE_FRAGMENT_TAG = "state:fragment_tag";

  private SettingsChangedListener mSettingsChangedListener;

  private ActionsContentView viewActionsContentView;

  private Uri currentUri = AboutFragment.ABOUT_URI;
  private String currentContentFragmentTag = null;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    mSettingsChangedListener = new SettingsChangedListener();

    setContentView(R.layout.example);

    viewActionsContentView = (ActionsContentView) findViewById(R.id.actionsContentView);
    viewActionsContentView.setSwipingType(ActionsContentView.SWIPING_EDGE);

    final ListView viewActionsList = (ListView) findViewById(R.id.actions);
    final ActionsAdapter actionsAdapter = new ActionsAdapter(this);
    viewActionsList.setAdapter(actionsAdapter);
    viewActionsList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> adapter, View v, int position,
          long flags) {
        final Uri uri = actionsAdapter.getItem(position);

        if (EffectsExampleActivity.URI.equals(uri)) {
          startActivity(new Intent(getBaseContext(), EffectsExampleActivity.class));
          return;
        }

        updateContent(uri);
        viewActionsContentView.showContent();
      }
    });

    if (savedInstanceState != null) {
      currentUri = Uri.parse(savedInstanceState.getString(STATE_URI));
      currentContentFragmentTag = savedInstanceState.getString(STATE_FRAGMENT_TAG);
    }

    updateContent(currentUri);
  }

  @Override
  public void onBackPressed() {
    final Fragment currentFragment = getSupportFragmentManager().findFragmentByTag(currentContentFragmentTag);
    if (currentFragment instanceof WebViewFragment) {
      final WebViewFragment webFragment = (WebViewFragment) currentFragment;
      if (webFragment.onBackPressed())
        return;
    }

    super.onBackPressed();
  }

  public void onActionsButtonClick(View view) {
    if (viewActionsContentView.isActionsShown())
      viewActionsContentView.showContent();
    else
      viewActionsContentView.showActions();
  }

  @Override
  protected void onSaveInstanceState(Bundle outState) {
    outState.putString(STATE_URI, currentUri.toString());
    outState.putString(STATE_FRAGMENT_TAG, currentContentFragmentTag);

    super.onSaveInstanceState(outState);
  }

  public void onSourceCodeClick(View view) {
    final Intent i = new Intent(Intent.ACTION_VIEW);
    i.setData(Uri.parse(getString(R.string.sources_link)));
    startActivity(i);
  }

  public void updateContent(Uri uri) {
    final Fragment fragment;
    final String tag;

    final FragmentManager fm = getSupportFragmentManager();
    final FragmentTransaction tr = fm.beginTransaction();

    if (!currentUri.equals(uri)) {
      final Fragment currentFragment = fm.findFragmentByTag(currentContentFragmentTag);
      if (currentFragment != null)
        tr.hide(currentFragment);
    }

    if (AboutFragment.ABOUT_URI.equals(uri)) {
      tag = AboutFragment.TAG;
      final Fragment foundFragment = fm.findFragmentByTag(tag);
      if (foundFragment != null) {
        fragment = foundFragment;
      } else {
        fragment = new AboutFragment();
      }
    } else if (SandboxFragment.SETTINGS_URI.equals(uri)) {
      tag = SandboxFragment.TAG;
      final SandboxFragment foundFragment = (SandboxFragment) fm.findFragmentByTag(tag);
      if (foundFragment != null) {
        foundFragment.setOnSettingsChangedListener(mSettingsChangedListener);
        fragment = foundFragment;
      } else {
        final SandboxFragment settingsFragment = new SandboxFragment();
        settingsFragment.setOnSettingsChangedListener(mSettingsChangedListener);
        fragment = settingsFragment;
      }
    } else if (uri != null) {
      tag = WebViewFragment.TAG;
      final WebViewFragment webViewFragment;
      final Fragment foundFragment = fm.findFragmentByTag(tag);
      if (foundFragment != null) {
        fragment = foundFragment;
        webViewFragment = (WebViewFragment) fragment;
      } else {
        webViewFragment = new WebViewFragment();
        fragment = webViewFragment;
      }
      webViewFragment.setUrl(uri.toString());
    } else {
      return;
    }

    if (fragment.isAdded()) {
      tr.show(fragment);
    } else {
      tr.replace(R.id.content, fragment, tag);
    }
    tr.commit();

    currentUri = uri;
    currentContentFragmentTag = tag;
  }

  private class SettingsChangedListener implements SandboxFragment.OnSettingsChangedListener {
    private final float mDensity = getResources().getDisplayMetrics().density;
    private final int mAdditionaSpacingWidth = (int) (100 * mDensity);

    @Override
    public void onSettingChanged(int prefId, int value) {
      switch (prefId) {
      case SandboxFragment.PREF_SPACING_TYPE:
        final int currentType = viewActionsContentView.getSpacingType();
        if (currentType == value)
          return;

        final int spacingWidth = viewActionsContentView.getSpacingWidth();
        if (value == ActionsContentView.SPACING_ACTIONS_WIDTH) {
          viewActionsContentView.setSpacingWidth(spacingWidth + mAdditionaSpacingWidth);
        } else if (value == ActionsContentView.SPACING_RIGHT_OFFSET) {
          viewActionsContentView.setSpacingWidth(spacingWidth - mAdditionaSpacingWidth);
        }
        viewActionsContentView.setSpacingType(value);
        return;
      case SandboxFragment.PREF_SPACING_WIDTH:
        final int width;
        if (viewActionsContentView.getSpacingType() == ActionsContentView.SPACING_ACTIONS_WIDTH)
          width = (int) (value * mDensity) + mAdditionaSpacingWidth;
        else
          width = (int) (value * mDensity);
        viewActionsContentView.setSpacingWidth(width);
        return;
      case SandboxFragment.PREF_SPACING_ACTIONS_WIDTH:
        viewActionsContentView.setActionsSpacingWidth((int) (value * mDensity));
        return;
      case SandboxFragment.PREF_SHOW_SHADOW:
        viewActionsContentView.setShadowVisible(value == 1);
        return;
      case SandboxFragment.PREF_FADE_TYPE:
        viewActionsContentView.setFadeType(value);
        return;
      case SandboxFragment.PREF_FADE_MAX_VALUE:
        viewActionsContentView.setFadeValue(value);
        return;
      case SandboxFragment.PREF_SWIPING_TYPE:
        viewActionsContentView.setSwipingType(value);
        return;
      case SandboxFragment.PREF_SWIPING_EDGE_WIDTH:
        viewActionsContentView.setSwipingEdgeWidth(value);
        return;
      case SandboxFragment.PREF_FLING_DURATION:
        viewActionsContentView.setFlingDuration(value);
        return;
      default:
        break;
      }
    }
  }
}