MainActivityController.java

/*
 	ApicAday - Everyday.. is different, your mood, your life. 
 	Copyright (c) 2010 
 		Oliver Selinger <oliver.selinger@autburst.com>,
 		Michael Greifeneder <michael.greifeneder@autburst.com> 
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.autburst.picture;

import android.content.Context;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageButton;
import android.widget.LinearLayout;

public class MainActivityController {

	private static final int NO_ALBUMS_EXIST = 0;
	private static final int ALBUMS_EXIST_NO_IMAGES = 1;
	private static final int ALBUM_AND_IMAGES_EXIST = 2;
	
	//stati
	private boolean DELETE_BUTTON_VISIBLE = false;
	private boolean DELETE_BUTTON_VISIBLE_AND_OPEN = false;
	
	private boolean OPEN_BUTTON_VISIBLE = false;
	private boolean OPEN_BUTTON_VISIBLE_AND_OPEN = false;
	
	//actions from gui
	public static final int STARTED = -1;
	public static final int CREATED_ALBUM = 0;
	public static final int PIC_SAVED = 1;
	
	public static final int OPEN_BUTTON_PRESSED = 2;
	public static final int OPEN_ALBUM = 4;
	
	public static final int DELETE_BUTTON_PRESSED = 3;
	public static final int DELETED_ALBUMS = 5;
	
	private Context ctx;
	private ImageButton openButton;
	private ImageButton deleteButton;
	private LinearLayout deletionPanel;
	
	public MainActivityController(Context ctx, ImageButton openButton, ImageButton deleteButton, LinearLayout deletionPanel) {
		this.ctx = ctx;
		this.openButton = openButton;
		this.deleteButton = deleteButton;
		this.deletionPanel = deletionPanel;
	}
	
	/**
	 * brings controller stati and buttons back to start position
	 */
	public void reset() {
		openButton.setVisibility(View.GONE);
		deleteButton.setVisibility(View.GONE);
		
		DELETE_BUTTON_VISIBLE = false;
		DELETE_BUTTON_VISIBLE_AND_OPEN = false;
		
		OPEN_BUTTON_VISIBLE = false;
		OPEN_BUTTON_VISIBLE_AND_OPEN = false;
	}
	
	public void transformGUI(int cmd) {
		
		int albumStatus = getAlbumStatus();
		
		switch (cmd) {
		case STARTED:
			switch (albumStatus) {
			case NO_ALBUMS_EXIST:
				//do nothing (set buttons gone in xml)
				break;
			case ALBUMS_EXIST_NO_IMAGES:
				//fade in delete button
				AnimationHelper.fadeInFromLeftToRight(ctx, deleteButton);
				DELETE_BUTTON_VISIBLE = true;
				break;
			case ALBUM_AND_IMAGES_EXIST:
				//fade in delete and open button
				AnimationHelper.fadeInFromLeftToRight(ctx, deleteButton);
				DELETE_BUTTON_VISIBLE = true;
				
				AnimationHelper.fadeInFromRightToLeft(ctx, openButton);
				OPEN_BUTTON_VISIBLE = true;
				break;
			}
			break;
		case CREATED_ALBUM:
			//fade in delete button if not visible
			if(!DELETE_BUTTON_VISIBLE) {
				AnimationHelper.fadeInFromLeftToRight(ctx, deleteButton);
				DELETE_BUTTON_VISIBLE = true;
			}		
			break;
		case PIC_SAVED:
			//fade in open button if not visible and delete button not open
			if(!OPEN_BUTTON_VISIBLE && !DELETE_BUTTON_VISIBLE_AND_OPEN) {
				AnimationHelper.fadeInFromRightToLeft(ctx, openButton);
				OPEN_BUTTON_VISIBLE = true;
			}	
			break;
		case OPEN_BUTTON_PRESSED:
			if (!OPEN_BUTTON_VISIBLE_AND_OPEN) {
				//fade out delete button
				AnimationHelper.fadeOutToLeftSide(ctx, deleteButton);
				DELETE_BUTTON_VISIBLE = false;
				OPEN_BUTTON_VISIBLE_AND_OPEN = true;
			} else if(OPEN_BUTTON_VISIBLE_AND_OPEN) {
				//fade in delete button
				AnimationHelper.fadeInFromLeftToRight(ctx, deleteButton);
				DELETE_BUTTON_VISIBLE = true;
				OPEN_BUTTON_VISIBLE_AND_OPEN = false;
			}
			break;
		case OPEN_ALBUM:
			//fade in delete button
//			AnimationHelper.fadeInFromLeftToRight(ctx, deleteButton);
//			DELETE_BUTTON_VISIBLE = true;
			
			OPEN_BUTTON_VISIBLE_AND_OPEN = false;
			break;
		case DELETE_BUTTON_PRESSED:
			if (!DELETE_BUTTON_VISIBLE_AND_OPEN) {
				//fade out open button if visible
				if (OPEN_BUTTON_VISIBLE) {
					AnimationHelper.fadeOutToRightSide(ctx, openButton);
					OPEN_BUTTON_VISIBLE = false;
				}
				
				// open deletionPanel
				Animation myFadeInAnimation = AnimationUtils.loadAnimation(
							ctx, R.anim.slight_top);
				deletionPanel.startAnimation(myFadeInAnimation);
				deletionPanel.setVisibility(View.VISIBLE);

				DELETE_BUTTON_VISIBLE_AND_OPEN = true;
			} else if(DELETE_BUTTON_VISIBLE_AND_OPEN) {
				//fade in open button if allowed
				switch (albumStatus) {
				case ALBUM_AND_IMAGES_EXIST:
					//fade in delete and open button
					AnimationHelper.fadeInFromRightToLeft(ctx, openButton);
					OPEN_BUTTON_VISIBLE = true;
					break;
				}
				
				// close deletionPanel
				Animation myFadeInAnimation = AnimationUtils.loadAnimation(
							ctx, R.anim.slight_bottom);
				deletionPanel.startAnimation(myFadeInAnimation);
				deletionPanel.setVisibility(View.GONE);
				
				DELETE_BUTTON_VISIBLE_AND_OPEN = false;
			}
			break;
			
		case DELETED_ALBUMS:
			// close deletionPanel
			Animation myFadeInAnimation = AnimationUtils.loadAnimation(
						ctx, R.anim.slight_bottom);
			deletionPanel.startAnimation(myFadeInAnimation);
			deletionPanel.setVisibility(View.GONE);
			
			DELETE_BUTTON_VISIBLE_AND_OPEN = false;
			
			switch (albumStatus) {
			case NO_ALBUMS_EXIST:
				//if open and delete buttons visible fade out
				if (OPEN_BUTTON_VISIBLE) {
					AnimationHelper.fadeOutToRightSide(ctx, openButton);
					OPEN_BUTTON_VISIBLE = false;
				}
				if (DELETE_BUTTON_VISIBLE) {
					AnimationHelper.fadeOutToLeftSide(ctx, deleteButton);
					DELETE_BUTTON_VISIBLE = false;
				}
				break;
			case ALBUMS_EXIST_NO_IMAGES:
				//fade out open button if visible
				if (OPEN_BUTTON_VISIBLE) {
					AnimationHelper.fadeOutToRightSide(ctx, openButton);
					OPEN_BUTTON_VISIBLE = false;
				}
				break;
			case ALBUM_AND_IMAGES_EXIST:
				//do nothing
				break;
			}
			break;
		default:
			break;
		}
	}
	
	private int getAlbumStatus() {
		if(Utilities.hasAnyAlbumPics())
			return ALBUM_AND_IMAGES_EXIST;
		else if(Utilities.hasAlbums())
			return ALBUMS_EXIST_NO_IMAGES;
		else 
			return NO_ALBUMS_EXIST;
	}
}