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Object Serialization for Undo/Redo Functionality Java


Object Serialization for Undo/Redo Functionality Java

By : Morteza Farhang
Date : October 28 2020, 08:00 PM
seems to work fine Game programming has not much to do with "enterprise app" programming nor with "webapp programming".
So it depends on what kind of game you're working on but your approach and the ones gaven so fare have absolutely nothing to do with how game states are saved in "real" games. The performances are going to be abysmally bad and you'll end up using a lot of memory and disk space.
code :


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Implementing Undo and Redo functionality javascript and php

Implementing Undo and Redo functionality javascript and php


By : Paul B
Date : March 29 2020, 07:55 AM
help you fix your problem I want to implement Undo and Redo functionality not only for client side but for server side as well. For insatnce i have a div containing image and i can rotate resize and rewrite it , All the basic operations for image generation. And all of the operations update databse and image. you can say my image is being regenerated and database is updated after every action. , At a basic level, you need two things:
Implementing Undo - Redo Functionality in Qt?

Implementing Undo - Redo Functionality in Qt?


By : ext.gzo
Date : March 29 2020, 07:55 AM
this one helps. Qt provides an Undo/Redo framework.
You basically implement a command, derived from QUndoCommand, for each of the actions you want to make undoable/redoable, and then push them to a QUndoStack. Later, the commands can be undone and redone by calling the corresponding slots on the QUndoStack.
Stack implementation for Undo/Redo functionality in game

Stack implementation for Undo/Redo functionality in game


By : Vincent Legoll
Date : March 29 2020, 07:55 AM
it should still fix some issue If you don't want to use Stacks because you're unsure when to clear the undo Stack, you can do this with a List. Then, your logic can be maintained in a similar fashion:
Keep an index of which move you are on (start at 0, increment by 1 for each new move) If an undo is done, decrement the index (unless you are at the beginning of the list) If a redo is done, increment the index (unless you are at the end of the list) If a new move is performed, increment the index and clear all of the moves greater than or equal to the index (thus clearing your undo/redo moves)
How to store and retrieve later data() object from DOM element for undo/redo functionality

How to store and retrieve later data() object from DOM element for undo/redo functionality


By : Shyam sunder k
Date : March 29 2020, 07:55 AM
it should still fix some issue As per question here we considering undo as the json object which will save all the data. Data should be saved something like
code :
var undo = [{ html0: data0 }, { html1: data1 }, { html2: data2 }];
//Saving to LocalStorage. 
//Advantages are data is still available on postback / reload of page

function saveToLocalStorage() {
    window.localStorage.setItem("undo", JSON.stringify(undo));
}

function getFromLocalStorage() {
    undo = JSON.parse(window.localStorage.getItem("undo"));
}
Undo/ redo functionality in html canvas

Undo/ redo functionality in html canvas


By : Nimr0d
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Use the command design pattern, and redraw your canvas from your history of commands. You will be able to save a large amount of steps (hundreds if not thousands).
In a nutshell, instead of drawing to canvas directly, you will wrap your operation in a command that is added to a list, and then executed. When the user wants to undo, you remove the last operation from the list, and replay it. You can also keep the list intact and update an index marker to allow for redo.
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