This is a question about OpenLaszlo (or rather Flex?) internals:
I was able to load a full Flex application swf into a OpenLaszlo (trunk release, older releases failed). It works in Flash 10 as well as in 11. But OpenLaszlo seems to capture or
block certain mouse events. When I add the SWF into
YFilesSWF.content.sprite (YFilesSWF is extending the window class)
then most mouse actions work (e.g. Flex buttons), but some don't (some clickable items on a kindo f canvas). I observed further that when I add the SWF to
YFilesSWF.sprite (YFilesSWF is extending the view)
, then the SWF does not react to ANY mouse events anymore. That means window is somewhat better, but not good enough.
I'm using the
flash.display.Loader
class for loading the SWF in a normal way. This is the AS3 Loader class implementation which I use for loading the swf and which I include inside the OpenLaszlo app :
public class LoadSwf extends Sprite
{
public var externalSwfLoader:Loader = new Loader();
public var swfDisplayObject:DisplayObject;
public var swfComObject:Object;
public function LoadSwf(url:String,p:Sprite):void
{
// externalSwfLoader.mouseChildren = false;
// this.mouseChildren = false;
// p.mouseChildren = false;
// externalSwfLoader.mouseEnabled = false;
// this.mouseEnabled = false;
// p.mouseEnabled = false;
p.addChild(this);
externalSwfLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, createSwfObjects);
externalSwfLoader.load(new URLRequest(url));
}
public function createSwfObjects(evt:Event):void
{
var loaderInfo:LoaderInfo = evt.target as LoaderInfo;
swfDisplayObject = evt.target.content;
swfComObject = loaderInfo.content;
addChild(swfDisplayObject);
}
}
This is the OpenLaszlo code of how the class is used:
<class name="YFilesSWF" extends="window">
<passthrough>
import LoadSwf;
</passthrough>
<attribute name="loadSwf" />
<handler name="oninit"><![CDATA[
this.loadSwf = new LoadSwf("SimpleGraphEditor.swf", this.content.sprite);
]]></handler>
</class>
Does anybody know what and where OpenLaszlo is destroying some
of the Flex mouse events and how to prevent it?
Is there a yet better component than window that will
preserve the Flex mouse events?
What would be required to modify in the OL components source code?
Thanks!
Related
I have a MX TextInput field on my form. As one of our user has seizure problems with blinking cursors, I am trying to disable it but without success. Through Control Panel, I have been able to prevent a blinking cursor in Office Apps and on the Web browsers but not with the Flex Application which uses the Flash Player. Has anyone come across this issue and have a solution?
Here's a simple solution that removes the cursor all together. I'm not sure if you want to remove the cursor (feasible) or stop the cursor from blinking (seems less feasible).
It works by setting the underlying TextField object's selectable property to false. The MX TextInput class has it's own selectable property, however, the code in TextInput also requires the editable property to be false to disable selection. So you need to extend TextInput to work around that.
The underlying TextField doesn't expose any properties to stop the cursor from blinking (that I'm aware of). TextField is one of Flash Player's built in classes, so the chances of modifying this low level behavior seem slim.
This obviously breaks the ability to copy/paste in the TextInput. You might have to devise a way to temporarily enable selection to support copy/paste or selecting text in general.
package
{
import mx.controls.TextInput;
public class CustomTextInput extends TextInput
{
public function CustomTextInput()
{
}
private var _hideCursor:Boolean = true;
private var hideCursorChanged:Boolean = true;
public function get hideCursor():Boolean
{
return _hideCursor;
}
public function set hideCursor(value:Boolean):void
{
if (value == hideCursor)
{
return;
}
hideCursorChanged = true;
_hideCursor = value;
invalidateProperties();
}
override protected function commitProperties():void
{
super.commitProperties();
if (hideCursorChanged)
{
hideCursorChanged = false;
textField.selectable = !_hideCursor;
}
}
}
}
I have the following AS code.I have noticed that if an Application i s using the webcamera then it cannot be used by any secondary applications until unless the primary application is closed.
My question is that from the following code 1.can we capture that condition
2.If no camera is detected how to give the alert since it is an AS code
EDIT:
Filename is cldAS.as
Now how to call cldAS() from any.mxml file .Some example would be appreciated
package org.com
{
import flash.display.Sprite;
import flash.media.*;
import flash.net.*;
public class cldAS extends Sprite
{
public function cldAS()
{
var cam:Camera = Camera.getCamera();
if(cam != null)
{
cam.setMode(640, 480, 30);
var video:Video = new Video(300, 450);
video.attachCamera(cam);
addChild(video);
}
else
{
trace("No Camera Detected");
//How to give an alert here
}
}
}
}
Alert.show("You don't seem to have a webcam.");
instead of
trace(...) ?
Alert is available in Flex only , in AS3 you should really implement your own solution, on the other hand , since Alert is a Javascript function , you could also use ExternalInterface to call it.
As far as implementing your own solution is concerned, at the minimum you need a TextField to display your message, which text you could provide by sending a CustomEvent with a message property that will simply take a String. It wouldn't take too much work to create your own Alert class.It would sit on top of your App , you could toggle visibility when receiving a CustomEvent and have a Close button to hide it.
You should be able to call your AS3 class within script tags , other than that I'll leave a more detailed answer to Flex experts. I'm not sure if you can add a Sprite directly into Flex , for all I remember an object in Flex must inherit from UIComponent in order to be added to the stage but check with the other guys here, I haven't used Flex in quite some time...
<mx:Script>
import org.com.cldAS;
public cld:cldAS = new cldAS();
</mx:Script>
I'm trying to implement a collapsible TitleWindow popup by adding a handle to the top right corner of a Panel control. Unfortunately, the image that I add as the handle doesn't show up when the control is drawn. I can trigger a redraw by changing the source of the image, so apparently it's there, but it's somehow hidden.
Is there a way to make this Image control visible to the user?
Here's the code for the window:
package
{
import mx.containers.Panel;
import mx.controls.Image;
public class CollapsableWindow extends Panel
{
public function CollapsableWindow()
{
super();
}
public var close:Image;
protected override function createChildren():void
{
super.createChildren();
close = new Image();
close.source = "/assets/close.png";
close.x = this.width - 20;
close.y = 8;
this.titleBar.addChildAt(close, 0);
}
}
}
You need to create your button in the createChildren method, then position it in the updateDisplayList method:
/**
* Creates the button and adds it to the titlebar
*/
override protected function createChildren():void
{
super.createChildren();
this.myButton = new Button();
this.myButton.addEventListener(MouseEvent.CLICK, onButtonClick);
this.titleBar.addChild(this.myButton);
}
/**
* Sizes and positions the button on the titlebar
*/
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
{
super.updateDisplayList(unscaledWidth, unscaledHeight);
this.myButton.setActualSize(myButton.getExplicitOrMeasuredWidth(),
myButton.getExplicitOrMeasuredHeight());
// Position the button
var y:int = 4;
var x:int = this.width - this.myButton.width - 2;
this.myButton.move(x, y);
}
I've had issues with PNG's not showing up in our app. Every once in a while, all our PNG's disappear. To test whether you're code suffers the same problem, try using a test image that's a GIF or other format. If it works then you're having the same issue I've run into dozens of times.
On our project, we solve this in two ways:
A workaround. Toggle your project's SDK version and, for some odd reason, that fixes it
So, for example, we use SDK 3.6
I right click on the project, chose properties and go to the Flex SDK section
From there I switch to ANY OTHER SDK version (say Flex 3.2) and choose ok
This triggers an automatic build (with some kind of mysterious PNG-fixing power)
Then I go back into the project properties and return it to our version.
8 times out of 10 this restores the PNG images
This worked even when we were using Flex SDK 3.4 and 3.5
A fix. Change your PNG format to PNG-24
It seems the root problem is related to using the PNG-8 format
For our images, I open the original in Photoshop press CMD-Shft-Ctrl-S, invoking "Save For Web..."
Then I choose PNG-24 for the format, instead of PNG-8
A similar process should work in any other image editing program
I hope that helps in some way,
-- gMale
How can I raise an event from a SWF file loaded into a Flex application (using SWFLoader)?
I want to be able to detect
a) when a button is pressed
b) when the animation ends
You'll need to do 2 things:
Dispatch an event from the loaded swf. Make sure the event bubbles if you sent it from nested views. Bubbling can be set through the bubbles property of the event.
Listen to the event from your main application. I think you should be able to do that on the content property of the SWFLoader instance.
mySWFLoader.content.addEventListener("myEvent", myEventHandler);
I took a lazier approach for raising the event inside flash
Flex:
<mx:SWFLoader source="homeanimations/tired.swf" id="swfTired" complete="swfTiredLoaded(event)" />
private function swfTiredLoaded(event:Event): void {
mySWFLoader.content.addEventListener("continueClicked", continueClickedHandler);
}
Flash:
dispatchEvent(new Event("continueClicked", true, true));
I believe its because you would be creating two seperate custom event class one in Flash and the other in Flex.
Dispatching one EV_NOTIFY.ANIMATION_ENDED from Flash may not be understood by Flex,since it has its own version of EV_NOTIFY.ANIMATION_ENDED.
As an adjunct to the answer by Christophe Herreman, and in case you were wondering, here is a way of making your own events...
package yourpackage.events
{
import flash.events.Event;
[Event(name="EV_Notify", type="yourpackage.events.EV_Notify")]
public class EV_Notify extends Event
{
public function EV_Notify(bubbles:Boolean=true, cancelable:Boolean=false)
{
super("EV_Notify", bubbles, cancelable);
}
}
}
I have taken the liberty of setting the default value of bubbles to true and passing the custom event type to the super constructor by default, so you can then just say...
dispatchEvent(new EV_Notify());
In your particular case I doubt there are times when you would not want your event to bubble.
The prefix EV_ on the name is my own convention for events so I can easily find them in the code completion popups, you'll obviously pick your own name.
For the two cases you cite you can either have two events and listen for both of them, or add a property to the event which says what just happened, which is the approach which is taken by controls like Alert...
package yourpackage.events
{
import flash.events.Event;
[Event(name="EV_Notify", type="yourpackage.events.EV_Notify")]
public class EV_Notify extends Event
{
public static var BUTTON_PRESSED:int = 1;
public static var ANIMATION_ENDED:int = 2;
public var whatHappened:int;
public function EV_Notify(whatHappened:int, bubbles:Boolean=true, cancelable:Boolean=false)
{
this.whatHappened = whatHappened;
super("EV_Notify", bubbles, cancelable);
}
}
}
then you call it as follows...
dispatchEvent(new EV_Notify(EV_NOTIFY.ANIMATION_ENDED));
you can then inspect the whatHappened field in your event handler.
private function handleNotify(ev:EV_Notify):void
{
if (ev.whatHappened == EV_Notify.ANIMATION_ENDED)
{
// do something
}
else if (ev.whatHappened == EV_Notify.BUTTON_PRESSED)
{
// do something else
}
etc...
}
HTH
I could not make this last approach work (with Flash CS4 and Flex 3). I put the dispatchEvent call in one of the last frames of my Flash animation, but could not pick it up in Flex.
I resorted to a counter variable and incrementing until I reached the known last frame number using the ENTER_FRAME event - which I can pick up using almost the same code.
If I can pick this up, then why can't I pick up a custom event?
Flex has built in drag-n-drop for list controls, and allows you to override this. But they don't cover this in examples. The built-in functionality automatically drags the list-item, if you want to override this you find the handlers are being set up on the list itself.
What I specifically want to do, is my TileList shows small thumbnails of items I can drag onto a large Canvas. As I drag an item from the list, the drag proxy should be a different image.
So, I followed the technique suggested and it only works if I explicitly set the width/height on the proxy Image. Why?
It's not obvious until you've tried it =) I struggled with the same thing just a few weeks ago. This was my solution:
The list:
<List>
<mouseDown>onListMouseDown(event)</mouseDown>
</Tree>
The mouse down handler:
private function onMouseDown( event : MouseEvent ) : void {
var list : List = List(event.currentTarget);
// the data of the clicked row, change the name of the class to your own
var item : MyDataType = MyDataType(list.selectedItem);
var source : DragSource = new DragSource();
// MyAwsomeDragFormat is the key that you will retrieve the data by in the
// component that handles the drop
source.addData(item, "MyAwsomeDragFormat");
// this is the component that will be shown as the drag proxy image
var dragView : UIComponent = new Image();
// set the source of the image to a bigger version here
dragView.source = getABiggerImage(item);
// get hold of the renderer of the clicked row, to use as the drag initiator
var rowRenderer : UIComponent = UIComponent(list.indexToItemRenderer(list.selectedIndex));
DragManager.doDrag(
rowRenderer,
source,
event,
dragView
);
}
That will start the drag when the user clicks an item in the list. Notice that I don't set dragEnabled and the other drag-related properties on the list since I handle all that myself.
It can be useful to add this to the beginning of the event handler:
if ( event.target is ScrollThumb || event.target is Button ) {
return;
}
Just to short circuit if the user clicks somewhere in the scrollbar. It's not very elegant but it does the job.
I found a simpler answer here. That example extends a DataGrid control, but you can do the same with a List control. In my case, I use an image source instead of Class:
public class CustomDragList extends List {
[Bindable]
public var dragProxyImageSource:Object;
override protected function get dragImage():IUIComponent {
var image:Image = new Image();
image.width = 50;
image.height = 50;
image.source = dragProxyImageSource;
image.owner = this;
return image;
}
}
Then use that custom list like this:
<control:CustomDragList
allowMultipleSelection="true"
dragEnabled="true"
dragProxyImageSource="{someImageSource}"
dragStart="onDragStart(event)"/>
Where 'someImageSource' can be anything you'd normally use for an image source (embedded, linked, etc.)