I have a flash assignment that I need help getting started, any advice would be greatly appreciated. The assignment is to create an application for playing a card game, I have to create an MXML component that has two variables, one variable stores the image of the back of a playing card, the other variable has t store all 52 options of a front facing card (the second variable will store over 50 images).
I've written the variable for the back of the card image like this:
public var backOfCard:Image = new Image();
backofCard.source = 'asset/backImage';
However I get an undefined variable error (1120: Access of undefined propery variable img1), I feel like there's something small that I'm missing here, but I was wondering if anyone could spot it.
I'd also like to know if I should use the same method for each jpg image for the front of the cards, it seems like it would be a lot of repetitive code aside from the change in filename for the front of the card images.
Here's a snippet of the homework assignment, again I just need help getting this part correct, I really appreciate any help with this.
Your job is to supply the custom component named Card. Create the
component by using File → New → MXML Component. In the popup dialog
box
leave the Package blank
Name the component Card
Base Card on spark.components.Image
What goes into the Card component?
For each card, we'll want to be able to show the front face of the
card, or its back face. That means each card should have a place to
store information about what file to show as its front face, and what
file to show as its back face.
To do this, create two variables in the Card component to store the
file names. You might call these variables backImage and frontImage.
Your access modifier is what's bothering me.
If you're creating these definitions in your class file, then the first statement works:
public var backOfCard:Image = new Image();
But if you're in one of the methods, usually the constructor (sometimes called the ctor), or any other method of the application, you could use the 2nd statement:
backofCard.source = 'asset/backImage';
But the combination of both is what I think is confusing. Because the "access modifier" (i.e. public, private, internal, protected) is what you use to define variables and methods within a class. And since you're putting both side-by-side (a definition and an assignment statement), I think you're mixing when to declare them.
Related
So I wanna read BP_ThirdPersonCharacter variables in my ThirdPersonMap. The thing is that I followed a youtube tutorial and I am completely new to UE5. And I have no clue if I am doing it right.
The Error
BP_ThirdPersonCharacter
ThirdPersonmap
I wanna do so that variable from ThirdPersonCharacter is visible and editable in ThirdPersonMap.
click the eye icon near the property to make it public
Since the Error you get is "access none", it is not a problem of exposing the variable but more about initializing it. Here, you are using level blueprint, so maybe your character is not loaded before the level blueprint, so that last one can't access the variable.
I can't really make sense on what you are trying to do from the screenshot, all I can say is that your variable (either just the variable or the whole Character) is not initialized.
But for sure, if you are trying to implement a double jump as the variable name suggest, then quit that Youtube tutorial because it is absolutly not the way of doing it. I could wrote thousand of line of why, so just first thing first : you never implement gameplay mechanics in Level Blueprint. Just never.
I'm trying to make a file that is easy for a non-flash user to use/reuse to easily display content. The key here is that this file is to be a template for a novice user to just copy/paste some very minimal code to create different "flash card" type swf files.
The file I am creating has multiple buttons on the main timeline which when clicked, attaches a movie clip which will display a dynamic text area with content specific for the button that was clicked. The content for the text area will be loaded from a separate text file.
For the sake of this example, I'm just going to refer to one button...
So, on the main timeline, in frame 1, I have a variable definition:
var myFilename1:String = "mySampleFile2.txt";
When the button on the main timeline, in frame 1 is pressed, a movie clip is loaded which contains a text area. The content for the text area is located in that file: mySampleFile2.txt.
If I hard-code the file name, it works like a dream:
myTextLoader.load(new URLRequest("mySampleFile2.txt"));
But I don't want to hard code the file name. I want to refer the variable in the main timeline. In AS 2, it would have been
myTextLoader.load(new URLRequest(_root.myFilename1));
In AS3 I thought it would be either:
myTextLoader.load(new URLRequest(root.myFilename1));
OR
myTextLoader.load(new URLRequest(MovieClip(this.parent.root).myFilename1));
When I run the code I get the following error and when I run a trace I get the file name is NULL.
TypeError: Error #2007: Parameter url must be non-null.
How to I access the file name stored in the variable on the main timeline?
*************************** UPDATE! *************************
So I just discovered that the issue is related to a button on the screen. The button is one from the buttons library. If I remove the button, everything works great. But as soon as that button is on the main timeline, it makes it to I cannot access the variables using MovieClip(root).variable_name;. Unfortunately I want that button to trigger the events within the MovieClip. Any thoughts?
Not a good idea
You are not able to achieve your goals with this bad practice approach.
to use/reuse
The code you want to provide is not very reusable. It heavily relies on one variable existing in a certain place. Therefore it cannot be use twice in a project.
But I don't want to hard code the file name.
And now you are hard coding the variable and its location. If you considered hard coding the file name to be a bad things, consider this a bad thing, too.
What the problem is
Basically speaking, the problem is that your component is reaching out to grab this variable from somewhere within your project. But it is not the concern of the component to find the content it should display. It is not well encapsulated.
Learning from existing things
You want to display text. Let's take a look at the TextField class to see how it displays text.
var tf:TextField = new TextField();
tf.text = "hello";
addChild(tf);
As you can see, the text that it should display is passed to the TextField object. There is not some arbitrary variable one has to set in order to modify the text, as you are planning to do:
var tf:TextField = new TextField();
var someArbitraryVariableThatModifiesATextField = "hello";
addChild(tf);
There is no obvious connection to the TextField object and if there's a second TextField, this doesn't work at all.
Applying that to the problem at hand
Just like the TextField, your "flash card" should receive the file as a parameter. Either pass it to the constructor as seen in the example below, or create a method that takes it as a parameter.
var card:Card = new Card("mySampleFile2.txt");
addChild(card);
Additional thoughts
Create additional methods to set the values individually. There's nothing worse than some code that does exactly what one wants, but only operates on files and one doesn't have a file. The goal is again, to make it easy to reuse the code
Use the [Inspectable] meta tag to allow the user of your code to modify the properties at author time. This can be used to the extend of modifying properties belonging to a physics engine, now this is what I would call easy to use for a novice user.
Instead of writing code and thus requiring to recompile the file again, take the information (either the path to the file or it content) from the flashars that are passed to the .swf file when it is embedded into an html page. This makes the single .swf file truely reusable and easiest to use, because there's no As3 coding required whatsoever.
I haven't tested this but I believe the "root"-stage would be:
this.parent
In the child swf.
check out this question: as3 access variable from parent swf
Good luck!
Accessing variables or movieclips at main timeline is as following:
AS2:
_root.variable_name;
AS3:
MovieClip(root).variable_name;
So I've been following this tutorial on AS3 and Flash. Its been going well until, note I have tried to contact the writer of the tutorial and had no reply. Here's what it tells me to do;
Right-click PlayScreen in the library, select Properties, and check Export for ActionScript. This time, instead of accepting the default value, enter the name of your document class. Click OK.
So it pops up an error, first we’ll have to make a new document class, since no two different objects can share the same class. Cancel the Properties box.
Hit File > New and select ActionScript File. Enter the (by now familiar) code.
Save this in the Classes directory as DocumentClass.as. (There’ll be no confusing the purpose of this file!) Now, back in your FLA, change the document class to DocumentClass.
Check everything’s fine by clicking that pencil icon — if it’s all OK, that should bring up the AS file that you just created.
// So this bits all fine, its the next that i'm stuck with:
Now you can set the PlayScreen‘s class to AvoiderGame. So do so!
// So I go ahead into the properties and change the name but then it pops up with the same error as before: 'Please enter a unique class name that is not associated with other library symbols'
What does this mean!? How do I resolve this!?
Full tutorial here:Flash Tutorial
Its hard to tell what you are trying to accomplish without knowing what all the parts you are referring to actually do, which are objects in the library and which are classes, but maybe this can help:
First of all, document class in AS3 typically refers to the project's main set of code that initializes the app. This class can be called anything but is often called Main, and is entered in the property panel that is displayed when you click the projects main stage in the field called class.
Now, when linking a class to an object in the library, its a little different. In the library object's property panel, tick the box for Export for Actionscript, and put a unique name in the top box. This is what you reference in your code to call it, like new somethingOrOther() or using the pic below as an exaample, new Ball(). The second box is the base class, pathed to where it lives in your code base. This is the class you will write that actually controls the object you've linked the class to. Giving a linked object a base class and a unique identifier allows you to use the same base class for multiple linked objects.
Note that when you do this approach, Flash will warn you that there is no class associated with Ball and one will be created for you. Don't worry, this is normal behavior. If you set this up properly, your object will still be controlled by its base class.
Say I have this specific button class in Flash called cont_button and it's supposed to be used to break out of a loop, but I want to use the class more than once. Is there a way to give every instance of this class some kind of parameter so that it knows which frame it nees to go to?
Example:
I have an instance of cont_button on frame 200 and there's a loop between 200 and 210. This cont_button executes a gotoAndPlay(211). But later on I have another instance of the button on frame 315 and a loop between 315 and 325. Is there a way to make it so each instance knows which frame it specifically needs to go to via the use of a variable? Or am I going to have to make an actionscript file for each individual one?
Pretty new to ActionScript so I appreciate the help and if there are good coding references to AS3 you guys recommend, I'll gladly look those over.
Sure, this is possible. One way you can do this is make the frame numbers class variables and when the button is clicked, they reference whatever value is stored in them, rather then hardcoded numbers. To get a better idea, can you post the relevant parts of your button class?
As you say, you need to pass a parameter to each instance of the button. There are lots of different ways you could do this, but I'd be tempted to just do it via the instance names.
You could name each button loopBreakTo211, loopBreakTo326 and so on, then in your button's class have:
var breakFrame:Number = Number(name.replace("loopBreakTo", ""));
(parent as MovieClip).gotoAndPlay(breakFrame);
Admittedly that's not a very robust way of doing it (for example, it will break if a button is named incorrectly and breakFrame ends up as NaN, so you might want to add a check for that), but it keeps the parameter together with the instance instead of in the timeline somewhere.
i have this apps: http://www.jungle-g.co.il/#/System/
Currently, when a user selects a product (eg shirt) He can make only one side of the shirt.
When the user wants to edit another side of the shirt, he will have to complete the booking of the first side and then invite the other side.
My problem is I can not find how to save the first image in the flash memory or in movieclipe.
My interview is to create a movieclip one for each side user edits only when the user decides to do the actual booking send all the pictures from the movieclip.
Is this possible? If not is there another way?
I did research on the topic and found no solution that I could use it.
I found the website: http://code.google.com/p/swfupload/
But I did not understand how it helps me in my case.
Thank you to all the helpers, I break my head for over a month on the case.
You can create a class to hold statics of your bitmapData.
package {
public class ShirtState
{
public static var ShirtFront:BitmapData;
public static var ShirtBack:BitmapData;
}
}
Say you have a shirt that you're editing one side of.
var shirtFront:MovieClip; //this is the shirt you are working with.
once you are done
var shirtFrontBitmap:Bitmap = new Bitmap(shirtFront.width, shirtFront.height);
shirtFrontBitmap.draw(shirtFront);
once you have the bitmap you can save it to your static class
ShirtState.shirtFront = shirtFrontBitmap.bitmapData;
you can then access it anytime in your app provided you don't reload it.
There are some caveats:
If you have a module application where individual swfs are loaded and unloaded by the DOM then you may want to use a LocalSharedObject to store your images. To do that you will have to convert the bitmap data to Base64 (I would anyways) and then store taht string in the local share object. Be mindful that object has a max file size (not sure what it is).
You don't necessarily have to store bitmaps of your shirt sides. You could create your application to create a Class for shirt and as long as an instance of it exists you can have access to both sides of the shirt.
I am not sure how you are building this app, but generally you wouldn't even need to use a static if everything is in the same context. The actual service call to deliver both sides of the shirt to a server for processing would be made at the absolute end.