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/*
* Copyright (c) 2013 Menny Even-Danan
*
* 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 net.evendanan.pushingpixels;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import com.anysoftkeyboard.utils.Log;
import com.menny.android.anysoftkeyboard.R;
public abstract class FragmentChauffeurActivity extends ActionBarActivity {
public static enum FragmentUiContext {
RootFragment,
DeeperExperience,
ExpandedItem,
IncomingAlert
}
private static final String TAG = "chauffeur";
private static final String ROOT_FRAGMENT_TAG = "FragmentChauffeurActivity_ROOT_FRAGMENT_TAG";
private static final String KEY_FRAGMENT_CLASS_TO_ADD = "KEY_FRAGMENT_CLASS_TO_ADD";
private static final String KEY_FRAGMENT_ARGS_TO_ADD = "KEY_FRAGMENT_ARGS_TO_ADD";
public static void addIntentArgsForAddingFragmentToUi(@NonNull Intent intent, @NonNull Class<? extends Fragment> fragmentClass, @Nullable Bundle fragmentArgs) {
intent.putExtra(KEY_FRAGMENT_CLASS_TO_ADD, fragmentClass);
if (fragmentArgs != null)
intent.putExtra(KEY_FRAGMENT_ARGS_TO_ADD, fragmentArgs);
}
private boolean mIsActivityShown = false;
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
mIsActivityShown = true;
if (savedInstanceState == null) {
//setting up the root of the UI.
setRootFragment(createRootFragmentInstance());
//now, checking if there is a request to add a fragment on-top of this one.
Bundle activityArgs = getIntent().getExtras();
if (activityArgs != null && activityArgs.containsKey(KEY_FRAGMENT_CLASS_TO_ADD)) {
Class<? extends Fragment> fragmentClass = (Class<? extends Fragment>) activityArgs.get(KEY_FRAGMENT_CLASS_TO_ADD);
//not sure that this is a best-practice, but I still need to remove this from the activity's args
activityArgs.remove(KEY_FRAGMENT_CLASS_TO_ADD);
try {
Fragment fragment = fragmentClass.newInstance();
if (activityArgs.containsKey(KEY_FRAGMENT_ARGS_TO_ADD)) {
fragment.setArguments(activityArgs.getBundle(KEY_FRAGMENT_ARGS_TO_ADD));
activityArgs.remove(KEY_FRAGMENT_CLASS_TO_ADD);
}
addFragmentToUi(fragment, FragmentUiContext.RootFragment);
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
}
}
protected abstract int getFragmentRootUiElementId();
protected abstract Fragment createRootFragmentInstance();
public void returnToRootFragment() {
if (!mIsActivityShown) return;
getSupportFragmentManager().popBackStackImmediate(ROOT_FRAGMENT_TAG, 0 /*don't pop the root*/);
}
public void setRootFragment(Fragment fragment) {
getSupportFragmentManager().popBackStack(ROOT_FRAGMENT_TAG, FragmentManager.POP_BACK_STACK_INCLUSIVE);
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.setCustomAnimations(R.anim.ui_context_root_add_in, R.anim.ui_context_root_add_out,
R.anim.ui_context_root_pop_in, R.anim.ui_context_root_pop_out);
transaction.replace(getFragmentRootUiElementId(), fragment);
//bookmarking, so I can return easily.
transaction.addToBackStack(ROOT_FRAGMENT_TAG);
transaction.commit();
}
public void addFragmentToUi(@NonNull Fragment fragment, FragmentUiContext experience) {
addFragmentToUi(fragment, experience, null);
}
/**
* Adds the given fragment into the UI using the specified UI-context animation.
*
* @param fragment any generic Fragment. For the ExpandedItem animation it is best to use a PassengerFragment
* @param experience
* @param originateView a hint view which will be used to fine-tune the ExpandedItem animation
*/
public void addFragmentToUi(@NonNull Fragment fragment, FragmentUiContext experience, @Nullable View originateView) {
if (!mIsActivityShown) return;
if (experience == FragmentUiContext.RootFragment) {
//in this case, I need to pop all the other fragments till the root.
returnToRootFragment();
}
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
//note: the animation should be declared before the fragment replace call, so the transaction will know to which fragment change it should be associated with.
switch (experience) {
case RootFragment:
transaction.setCustomAnimations(R.anim.ui_context_root_add_in, R.anim.ui_context_root_add_out,
R.anim.ui_context_root_pop_in, R.anim.ui_context_root_pop_out);
break;
case DeeperExperience:
transaction.setCustomAnimations(R.anim.ui_context_deeper_add_in, R.anim.ui_context_deeper_add_out,
R.anim.ui_context_deeper_pop_in, R.anim.ui_context_deeper_pop_out);
break;
case ExpandedItem:
//although this managing Activity can handle any generic Fragment, in this case we'll need some help from the fragment.
//it is required to fine tune the pivot of the scale animation.
//so, I'll need the specialized fragment PassengerFragment
if (fragment instanceof Passengerable && originateView != null) {
View fragmentParent = findViewById(getFragmentRootUiElementId());
// Idea taken from:
// http://developer.android.com/training/animation/zoom.html
final float scaleX = ((float) originateView.getWidth())
/ ((float) fragmentParent.getWidth());
final float scaleY = ((float) originateView.getHeight())
/ ((float) fragmentParent.getHeight());
// some preparations
// the Y pivot is tricky, it should be the middle of the button, but in
// the fragmentParent coordinates
int[] originateLocation = new int[2];
originateView.getLocationInWindow(originateLocation);
int[] parentLocation = new int[2];
fragmentParent.getLocationInWindow(parentLocation);
final int pivotY = originateLocation[1] - parentLocation[1] + (originateView.getHeight() / 2);
final int pivotX = originateLocation[0] - parentLocation[0] + (originateView.getWidth() / 2);
Passengerable passengerFragment = (Passengerable) fragment;
passengerFragment.setItemExpandExtraData(pivotX, pivotY, scaleX, scaleY);
transaction.setCustomAnimations(R.anim.ui_context_expand_add_in, R.anim.ui_context_expand_add_out,
R.anim.ui_context_expand_pop_in, R.anim.ui_context_expand_pop_out);
} else {
//using the default scale animation, no pivot changes can be done on a generic fragment.
transaction.setCustomAnimations(R.anim.ui_context_expand_add_in_default, R.anim.ui_context_expand_add_out,
R.anim.ui_context_expand_pop_in, R.anim.ui_context_expand_pop_out_default);
}
break;
case IncomingAlert:
transaction.setCustomAnimations(R.anim.ui_context_dialog_add_in, R.anim.ui_context_dialog_add_out,
R.anim.ui_context_dialog_pop_in, R.anim.ui_context_dialog_pop_out);
break;
default:
Log.wtf(TAG, "I don't know what is this UI experience type: " + experience);
break;
}
//these two calls will make sure the back-button will switch to previous fragment
transaction.replace(getFragmentRootUiElementId(), fragment);
transaction.addToBackStack(null);
transaction.commit();
}
@Override
public void onBackPressed() {
super.onBackPressed();
if (getSupportFragmentManager().getBackStackEntryCount() == 0) {
//the UI is empty. I can safely finish the activity
finish();
}
}
@Override
protected void onStart() {
super.onStart();
mIsActivityShown = true;
}
@Override
protected void onStop() {
super.onStop();
mIsActivityShown = false;
}
public final boolean isChaufferActivityVisible() {
return mIsActivityShown;
}
}
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