New to AS/FLEX, actually couldn't find much information on google about this simple question. I have an Image in mxml, with a source pointing to a variable that has an embedded source as follows
<mx:Image id="image" source="{imageSource}"/>
[Bindable]
[Embed(source="pic.png")]
public var imageSource:Class
This is good for loading a single image, but when the image is pressed, I want the source to point to a new variable that has a different source embedded
[Bindable]
[Embed(source="pic.png")]
public var imageSource2:Class
When image is clicked I have something like
image.source = imageSource2;
image.validateNow();
This kind of updates my image but not immediately after .validateNow(), if I go through the debugger and stop right after that point, its still the same image. It seems to update after the entire method finishes, but the idea behind this method is that in the beginning it will start with one image, and before it ends it will switch to another image, so the image changes twice in the single call
Related
I have a requirement that we should be able to copy an image displayed in our application, to Clipboard and paste it outside (Like on Excel).
I was trying the below code snippet (Inside a button Click).
Clipboard.generalClipboard.clear();
var dataLoaded:Boolean = Clipboard.generalClipboard.setData(ClipboardFormats.RICH_TEXT_FORMAT,
byteArray, false);
The dataLoaded object is true, however it does not paste anything when tried on Excel or MsPaint.
Do we have any way to achieve this?
Thanks.
The code you are showing is not enough in itself to get a successful transfer. Like many other operations within the security sandbox of a FP app (web) this code can only respond to a direct user interaction. So your code without any valid context cannot work of course but if called within a mouse down listener for example (a true user generated mouse event, creating a fake mouseevent would still not work) it should respond correctly:
private function handleMouseClick(event:MouseEvent):void
{
Clipboard.generalClipboard.clear();
var dataLoaded:Boolean = Clipboard.generalClipboard.setData(ClipboardFormats.RICH_TEXT_FORMAT, byteArray, false);
}
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;
I need to make it so that I go to frame 0 on a loader's animation. I have gone to Google, and searched on how to do this, but nothing shows up that's related. It should be possible, because I have seen it done before, but I just haven't found anything on how to do it.
Is there any way to reset the animation, or go to a specific frame?
are you using gotoAndPlay(0)?
if so, that might be your problem. Frames count starts at 1 not 0, so it should be gotoAndPlay(1) if you want to start from beginning.
the way I handle externally loaded content is through an SwfLoad class from casaLib :
http://as3.casalib.org/docs/org_casalib_load_SwfLoad.html
you can download casalib through http://casalib.org/
Note that this will only work if you have control over the file that you are loading
Int the file that is being loaded make sure you set a class name (linkage ID) for the movie clip you are trying to load.
//load your asset file:
this._swfLoad = new SwfLoad("myExternalLib.swf");
//and create the asset:
var externalAsset:DisplayObject = this._swfLoad.createClassByName("RedBox");
you can create more of these objects when you need to reload.
the first link shows full example
I am creating an app where when a button is pressed a very large picture is added to the stage (it is larger than the screen but can be dragged around by the user)
When the button is pressed the picture (well, movieClip) does come up and it able to be dragged fine, buttons inside it work.
The problem though is that there is a pause of about 6 seconds between the button press and the image appearing. I am using one .fla file for publishing and compiling (let's just call it Main.fla for now), and another one to hold all the graphics. The graphics are then added with this embed command:
[Embed (source = "assets/graphic.swf", symbol = "Content")]
private var Content:Class;
private var _content:*;
I have these lines where all the variables are declared (in between the class definition and the constructor function) I was under the impression that embedding it like this was equivalent to loading it at compile time. Is this true? What could be causing this lag when the button is pressed?
If I can't cut out the lag, another idea I had was to make some spinning circle or something to tell the user, "hey, don't worry. It's loading!"
If the slowness is at addChild you can add the asset to the stage much earlier and set it's visiblility to false, then when the button is clicked set it back to true. Obviously this is a small hack but might be sufficient for what you are doing.
var asset:MovieClip;
private function init():void
{
asset = new Content();
assset.visible = false;
addChild(asset);
button.addEventListener(MouseEvent.CLICK, onMouseClick);
}
private function onMouseClick(e:MouseEvent):void
{
asset.visible = true;
}
Embedding your SWF is probably not what is causing the delay.. or rather it would not likely be better if you imported the SWF into your FLA. Is this on a device? Chances are you would either have to devise a different way of loading your asset, or be satisfied with a loading animation.
If the main K size is coming from a large image, you could consider loading it in segments, starting with the part that is initially visible.
I usually, use SWF Protection, to protect my swf's from decompiling.
It also adds a load bar to the swf.
The problem is that I have codes like this:
logo= new marca();
parent.addChild(logo);
logo.mouseEnabled=false;
I use parent, because I need to put the movie clip above everything, because my application allows the user to add a lot of things to the stage, so a don't want anything covering the logo.
The application works well while unprotected, but If I protect it using SWF Protection, then, I get just white screen. Nothing appears after loading.
Is there another way, to put a movieclip above everything, without being necessery to add a ON ENTER FRAME LISTENER, to update the movieclip deph, to keep it above everything?
You can use addChildAt instead of addChild to add your other clips to the stage under the logo's level.
var levelUnderLogo:uint = numChildren == 1 ? 0 : numChildren-2;
clipYouWantUnderTheLogo = new MovieClip();
addChildAt(clipYouWantUnderTheLogo, levelUnderLogo);
edit: You can also put every other clip inside another clip that is always under the logo.
var base = new MovieClip();
addChild(base);
var logo = new Logo();
addChild(logo);
// Add all your other objects into the "base" clip.
var someClipUnderTheLogo = new MovieClip();
base.addChild(someClipUnderTheLogo);
You are getting the white screen because the swf embed method is breaking in the javascript. Basically you have a javascript error.
Because you did not post code I can't help you much more. All I can say is put alerts in the javascript and see how far you get.