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Goodbye little ones. See you on the other side.

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git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@509 c613c5cb-e716-0410-b11b-feb51c14d237
This commit is contained in:
Robert Zubeck
2007-11-20 20:15:02 +00:00
parent 451baa1fb6
commit c250220684
2 changed files with 0 additions and 170 deletions
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src/as/com/threerings/ezgame/util/GameMode.as
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//
// $Id$
//
// Vilya library - tools for developing networked games
// Copyright (C) 2002-2007 Three Rings Design, Inc., All Rights Reserved
// http://www.threerings.net/code/vilya/
//
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation; either version 2.1 of the License, or
// (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package com.threerings.ezgame.util {
/**
* Interface for game modes, handled by the GameModeStack. Game modes are notified when they
* become activated and deactivated, so that they can adjust themselves accordingly.
*/
public interface GameMode
{
/**
* Called when this instance of GameMode is added to the top of the stack.
*/
function pushed () :void;
/**
* Called when this instance of GameMode is removed from the top of the stack.
*/
function popped () :void;
/**
* Called when this instance of GameMode was the top of the stack, but another instance
* is being pushed on top of it.
*/
function pushedOnto (mode :GameMode) :void;
/**
* Called when another instance is being removed from the top of the stack,
* making this instance the new top.
*/
function poppedFrom (mode :GameMode) :void;
}
}
src/as/com/threerings/ezgame/util/GameModeStack.as
-118
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//
// $Id$
//
// Vilya library - tools for developing networked games
// Copyright (C) 2002-2007 Three Rings Design, Inc., All Rights Reserved
// http://www.threerings.net/code/vilya/
//
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation; either version 2.1 of the License, or
// (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package com.threerings.ezgame.util {
/**
* GameModeStack implements a stack of user-specific <i>game modes</i>. Modes can be pushed on to
* or popped off of the stack. Whenever a new mode is pushed on the stack, the old top is cleaned
* up, and the new one is initialized; vice versa for popping a mode off the stack.
*
* Usage example:
* <pre>
* var mgr :GameModeStack = new GameModeStack(switchDisplayFn);
* mgr.push(new MainMenu());
* ...
* // in the main menu, we decide to pick a level
* mgr.push(new LevelSelectorScreen());
* ...
* // inside the level selector, we start the game:
* mgr.push(new GameScreen());
* ...
* // inside the game screen, once it was won or lost:
* mgr.pop();
* </pre>
*/
public class GameModeStack
{
/**
* Constructor, receives a function to be called whenever the top of the stack changes.
*
* @param callback Called whenever the top of the stack changes. Should be a function like:
* function (previousTop :GameMode, newTop :GameMode) :void { }
* - where previousTop is the mode previously selected, and newTop is the mode currently
* selected (either can be null).
*/
public function GameModeStack (callback :Function)
{
_callback = callback;
}
/** Returns the top of the mode stack. If the stack is empty, returns null. */
public function top () :GameMode
{
return (_stack.length > 0) ? _stack[0] : null;
}
/** Pops all items off the stack. */
public function clear () :void
{
while (top() != null) {
pop();
}
}
/**
* Pushes a new game mode on top of the stack.
*/
public function push (newMode :GameMode) :void
{
var oldMode :GameMode = top();
if (oldMode != null) {
oldMode.pushedOnto(newMode);
}
_stack.unshift(newMode);
newMode.pushed();
_callback(oldMode, newMode);
}
/**
* Pops and returns the current top game mode from the stack. Popping an empty stack is safe,
* it simply returns null.
*/
public function pop () :GameMode
{
var oldMode :GameMode = top();
if (oldMode == null) {
return null;
}
_stack.shift();
oldMode.popped();
var newMode :GameMode = top();
if (newMode != null) {
newMode.poppedFrom(oldMode);
}
_callback(oldMode, newMode);
return oldMode;
}
/** Function that will be called every time the stack changes. */
protected var _callback :Function;
/** Internal storage for the stack. */
protected var _stack :Array = new Array(); // of GameModes
}
}