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multicontainerhandler.js
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multicontainerhandler.js
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/*
* MultiContainerJs is a small programm to automatically throw around
* boxes in a browser window.
*
* Copyright (C) 2009 Florian Herlings (florianherlings.de)
*
* 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/>.
*
* Version: 0.3
* Date: 02.08.2009
*/
/**
* The Positions object holds the screen positions for
* the animation key points:
* - ehe starting point for the animation (start)
* - the ending point for the animation (stop)
* - the point, where the animated object is supposed
* to be while it is selected.
*
* This object is used by the ContainerHandler object.
*/
var Positions = {
'_center': function() {
return {
x: document.viewport.getWidth() /2,
y: document.viewport.getHeight() /2
}
},//_center()
'start': function( id ) {
return {
x: document.viewport.getWidth(),
y: document.viewport.getHeight() }
},//start()
'middle': function( id ) {
return {
x: Positions._center().x - $(id).getWidth() /2,
y: (Positions._center().y - $(id).getHeight() /2)*0.9 //The 0.9 is because geometrical center != optical center
}
},//middle()
'stop': function( id ) {
return {
x: $(id).getWidth() *-1,
y: $(id).getHeight() *-1 }
}//stop()
}//Positions
/**
* The ResizeDetector object checks the window sizes
* every second to detect if the window has been resized.
* If this is the case, it calls the "correct_position"
* function on the MultiContainerHandler, which pushes
* all the containers to their new positions.
*/
var ResizeDetector = {
'init': function() {
ResizeDetector.buffer = document.viewport.getDimensions();
new PeriodicalExecuter(ResizeDetector.check, 1);
}, //init()
'check': function() {
now = document.viewport.getDimensions();
if ((now.width != ResizeDetector.buffer.width) || (now.height != ResizeDetector.buffer.height)) {
MultiContainerHandler.correct_position();
ResizeDetector.buffer = document.viewport.getDimensions();
}
}//check()
}//ResizeDetector
var ContainerHandler = {
/**
* Moves the item just above the top left position
* of the browser's viewport.
*/
'init': function( id ) {
//top left
$(id).setStyle({
left: Positions.start(id).x+"px",
top: Positions.start(id).y+"px",
opacity: 0.0
});
},//init()
'show': function( id ) {
new_position = Positions.middle(id);
new_position.mode = 'absolute';
new Effect.Parallel([
new Effect.Move(id, new_position),
new Effect.Opacity(id, {to: 1.0})
],{ duration: 0.4, transition: Effect.Transitions.sinoidal });
},//show()
'hide': function( id ) {
new_position = Positions.stop(id);
new_position.mode = 'absolute';
new Effect.Parallel([
new Effect.Move(id, new_position),
new Effect.Opacity(id, {to: 0.0})
],{ duration: 0.4, afterFinish: function() {ContainerHandler.init(id);} });
}//hide()
}//ContainerHandler
var MultiContainerHandler = {
'init': function() {
if ($('loading')){
ContainerHandler.init('loading');
ContainerHandler.show('loading');
}
MultiContainerHandler.current = -1;
MultiContainerHandler.containers = $$('.container');
MultiContainerHandler.containers.each( function(item) {
ContainerHandler.init(item.id);
});
$$('.button_next').each(function(button) {
button.observe('click', MultiContainerHandler.next);
});
},//init()
'next': function() {
if ($('loading')){
ContainerHandler.hide('loading');
}
MultiContainerHandler.current++;
if (MultiContainerHandler.current > MultiContainerHandler.containers.length-1) MultiContainerHandler.current = 0;
var previous = MultiContainerHandler.current -1;
if (previous < 0) previous = MultiContainerHandler.containers.length-1;
ContainerHandler.hide(MultiContainerHandler.containers[previous].id);
ContainerHandler.show(MultiContainerHandler.containers[MultiContainerHandler.current].id);
},//next()
'correct_position': function() {
ContainerHandler.show(MultiContainerHandler.containers[MultiContainerHandler.current].id);
},//correct_position()
'jump_to': function(num) {
//Do nothing, if the selected item is already the current item
if (MultiContainerHandler.current == num-1) return false;
//Hide the current item, make the selected item the current one and display
//the current one (which has bacome the selected one)
ContainerHandler.hide(MultiContainerHandler.containers[MultiContainerHandler.current].id);
MultiContainerHandler.current = num-1;
ContainerHandler.show(MultiContainerHandler.containers[MultiContainerHandler.current].id);
}//jump_to
}//MultiContainerHandler