How do I make it look like a button was pressed using C# code? If I can actually push the button (play the animation and activate the events associated with the button press) with code that would be even better.
Playing the animation is pretty easy, using the Visual State Manager:
private async void PretendToClickButton()
{
VisualStateManager.GoToState(myButton, "Pressed", true);
await Task.Delay(250);
VisualStateManager.GoToState(myButton, "Normal", true);
}
You can play with the delay as you see fit.
Programmatically raising the event is not possible; you just have to call the handler method(s) directly (which assumes you the code that handles the event).
[Edit: You could subclass Button and provide your own mechanism for simulating the Click event, but that makes the XAML a wee bit trickier]
Related
I'm creating a little developer console for an AS3 AIR application, I'm wanting F12 to add the toggle the display of the console screen but I don't want to litter my program with a bunch of calls to the Console to show or hide it, I also don't really want to be re-creating the console on different screens of my application.
I'm wondering if there's a way or a place I can put my keyboard event to toggle the display that will handle it across the entire application? At the moment I've tried putting it into my Main class which calls the first screen in the hopes that would be able to handle it but as soon as I click on another screen my eventListener isn't called.
Any ideas?
You could add your event listener to FlexGlobals.topLevelApplication instead of specific views, this would achieve the reduction you require
For true application level keyboard handling, attach the listener on the NativeApplication.nativeApplication object.
NativeApplication.nativeApplication.addEventListener(KeyboardEvent.KEY_DOWN, toggleDevConsole,false,0,true);
Attaching the listener to the stage will only work when that particular stage (window) has the focus. This will become an issue if your application has multiple windows that require interaction.
For single window applications, either will work.
Woops, I'm not quite with it today!
For future reference I added the event listener to the Stage in my Main function and it's being picked up every time.
stage.addEventListener(KeyboardEvent.KEY_DOWN, toggleDevConsole, false, 0, true);
I have one swing code written by other person. For swing tabbed pane, he has added both change and container listener and both calls the same method:
addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent theEvent ) {
someMethod();
}
} );
addContainerListener(new ContainerAdapter() {
public void componentAdded(ContainerEvent theEvent) {
someMethod();
}
public void componentRemoved(ContainerEvent theEvent) {
someMethod();
}
} );
Whenever tab is removed from this tabbed pane, it internally calls JTabbedPane.removeTabAt(int index), which in turn calls fireStateChanged() causing new change event listened by change listener.
Now as new component (tab) is removed from tabbed pane, it also calls componentRemoved(ContainerEvent theEvent) method of container listener.
Both change even and container events, then calls same method someMethod(), which does set background and foreground colors.
I would like to know, if this kind code might cause some issues. Recently we are facing random IndexOutOfBoundException exeptions. I am just wondering, if this is causing this issue.
Also as per my understanding in swing, once event is listened, logic inside it should be executed using worker thread (e.g. SwingWorker). Please let me know if this is correct.
I am new to swing, thus any hint would be appreciated.
Thanks.
Whenever tab is removed from this tabbed pane, it internally calls
JTabbedPane.removeTabAt(int index), which in turn calls
fireStateChanged() causing new change event listened by change
listener.
This is true if the removed tab is also the selected tab. In the other cases, you won't be notified.
You need to choose what event you want to listen to:
Addition/Removal of components?--> go for ContainerListener
Selected tab? --> go for ChangeListener
I would like to know, if this kind code might cause some issues.
Recently we are facing random IndexOutOfBoundException exeptions. I am
just wondering, if this is causing this issue.
Since there is no line in your sample code that could throw that Exception, it is impossible to answer your question. Post an SSCCE that shows your issue.
Also as per my understanding in swing, once event is listened, logic
inside it should be executed using worker thread (e.g. SwingWorker).
Please let me know if this is correct.
It depends:
If you need to modify anything in the UI, anything related to Swing, it needs to be executed on the EDT (Event Dispatching Thread) and thus, SwingWorker is not an option.
If you need to perform business logic operations, and especially if they can be lengthy, then you should indeed use a SwingWorker or any other mechanism to execute that code in another thread than the EDT. Consider visiting the Swing tag wiki on "Concurrency"
I'm having trouble simulating a click call to a button(displayObject) thats generated via an API call( youtube as3 API). I have not seen any mention of security reasons as to why I can not simulate a click as long as something is registered with a click handler.
Basically I checked to make sure the button made is listening to a mouse click event with:
trace(generatedButton.hasEventListener(MouseEvent.CLICK)) which returns true
I proceed to than call this:
generatedButton.dispatchEvent( new MouseEvent(MouseEvent.CLICK, true) );
And nothing happens yet if I physically click the button it works. Is there some security measure that prevents something from being fake clicked unless its origin is strictly from the system mouse?
I even set a timeout call on the click function and moved my cursor over the button and let it fire in case it was an issue of the mouse having to over the object but still nothing. I am kind of stumped at this point.
Any help would be appreciated!
Ok well I made a quick FLA and wrote this code and the dispatch Mouse event works perfectly..
import flash.events.MouseEvent;
myButton.addEventListener(MouseEvent.CLICK, myClickHandler);
function myClickHandler(e:MouseEvent):void
{
trace("clicked");
}
setTimeout(function()
{
myButton.dispatchEvent(new MouseEvent(MouseEvent.CLICK));
},2000);
YouTube api must block against something like this
The following code works fine in my local sandbox.
btn.addEventListener( MouseEvent.CLICK, test )
function test( e:Event ):void{
trace('asdf');
}
btn.dispatchEvent( new MouseEvent( MouseEvent.CLICK ) );
So I can only come to 2 conclusions.
First is a security issue. Flash has some security issues with click events triggering the FileReference class where it can only be used if the stack has a user click in it. This issue may carry over to any artificial dispatching of that event. It works in my sandbox because the restriction doesn't apply here.
The second one is you are dispatching the event to soon and the buttons listener hasn't been added to the button from the api.
In this case try calling the dispatch after the stage render event has been called.
stage.addEventListener( Event.RENDER, test )
function test( e:Event ):void{
btn.dispatchEvent( new MouseEvent( MouseEvent.CLICK ) );
}
Just my guess anyway.
instead of doing a dispatchEvent, which will eventually call a method anyway, just call the method and since its expecting a MouseEvent, do yourClickMethod(null)
You can't simulate click events on a server, it is because security issues. Instead of dispatchingEvent you can call method directly. I ll look for the description but its illegal. You can check firefox firebug logs for error description.
It it possible to catch a double right click event in Actionscript 3?
It is with AIR. You can't capture RIGHT_CLICK in regular AS3, unfortunately.
There is, however, always the possibility of capturing right click events in JavaScript, and using ExternalInterface to call an event handler in the Flash program. See this blog, for example.
Actually you can catch RIGHT_CLICK at the moment :
You need player >11.2
Add additional compiler options -swf-version=19
Use this code :
stage.doubleClickEnabled = true;
stage.addEventListener(MouseEvent.RIGHT_CLICK, handler);
In handler you can save time of previous click, compare with second click and if it`s shorter than 0.5 seconds dispatch your own RIGHT_DOUBLE_CLICK event.
Two years ago, when I was developing an application for the iPhone, I used the following built-in system method on all of my buttons:
[button setExclusiveTouch:YES];
Essentially, if you had many buttons on screen, this method insured that the application wouldn't be permitted do crazy things when several button events firing at the same time as any new button press would cancel all others.
problematic: ButtonA and ButtonB are available. Each button has a mouse up event which fire a specific animated (tweened) reorganization/layout of the UI. If both button's events are fired at the same time, their events will likely conflict, causing a strange new layout, perhaps a runtime error.
solution: Application buttons cancel any current pending mouse up events when said button enters mouse down.
private function mouseDownEventHandler(evt:MouseEvent):void
{
//if other buttons are currently in a mouse down state ready to fire
//a mouse up event, cancel them all here.
}
It's simple to manually handle this if there are only a few buttons on stage, but managing buttons becomes more and more complicated / bug-prone if there are several / many buttons available.
Is there a convenience method available in AIR specifically for this functionality?
I'm not aware of such thing.
I guess your best bet would be creating your own Button class where you handle mouse down, set a static flag and prevent reaction if that flag has been already set up by other instance of the same class.
In pseudo-code:
class MyButton
{
private static var pressed : Boolean = false;
function mouseDown(evt : MouseEvent)
{
if(!pressed)
{
pressed = true;
// Do your thing
}
}
}
Just remember to set pressed to false on mouse up and you should be good to go.
HTH,
J