com.github.riotopsys.malforandroid2.activity.BaseDetailActivity.java Source code

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Here is the source code for com.github.riotopsys.malforandroid2.activity.BaseDetailActivity.java

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/**
 * Copyright 2013 C. A. Fitzgerald
 *
 *  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.github.riotopsys.malforandroid2.activity;

import java.util.Collection;
import java.util.LinkedList;

import javax.annotation.Nullable;

import roboguice.inject.InjectView;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.view.MenuItem;
import android.view.View;

import com.github.riotopsys.malforandroid2.R;
import com.github.riotopsys.malforandroid2.event.ChangeDetailViewRequest;
import com.google.inject.Inject;

import de.greenrobot.event.EventBus;

public abstract class BaseDetailActivity extends BaseActivity {

    @Nullable
    @InjectView(R.id.detail_frame)
    protected View detailFrame;

    @Inject
    private EventBus bus;

    private LinkedList<ChangeDetailViewRequest> manualBackStack = new LinkedList<ChangeDetailViewRequest>();
    protected ChangeDetailViewRequest currentDetail = null;

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

        if (savedInstanceState != null) {
            currentDetail = (ChangeDetailViewRequest) savedInstanceState.get("currentDetail");
            manualBackStack.clear();
            manualBackStack.addAll((Collection<ChangeDetailViewRequest>) savedInstanceState.get("manualBackStack"));
        }

    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        outState.putSerializable("currentDetail", currentDetail);
        outState.putSerializable("manualBackStack", manualBackStack);

        super.onSaveInstanceState(outState);
    }

    @Override
    public void onPause() {
        bus.unregister(this);
        super.onPause();
    }

    @Override
    public void onResume() {
        bus.register(this);
        super.onResume();
    }

    @Override
    public void onBackPressed() {
        if (manualBackStack.isEmpty()) {
            super.onBackPressed();
        } else {
            currentDetail = manualBackStack.pop();
            transitionDetail(true);
        }
    }

    public void onEventMainThread(ChangeDetailViewRequest cdvr) {
        if (cdvr.equals(currentDetail)) {
            return;
        }
        manualBackStack.push(currentDetail);
        currentDetail = cdvr;
        transitionDetail(false);
    }

    protected void purgeFakeBackStack() {
        manualBackStack.clear();
        currentDetail = null;
    }

    protected abstract void transitionDetail(boolean wasBack);

    protected void setAnimations(boolean wasBack, FragmentTransaction transaction) {
        if (wasBack) {
            transaction.setCustomAnimations(R.anim.scale_in, R.anim.slide_down);
        } else {
            transaction.setCustomAnimations(R.anim.slide_up, R.anim.scale_out);
        }
    }

    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.menu_donate:
            startActivity(new Intent(this, DonateActivity.class));
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

}