How to remove event listeners dynamically?
I have a graphic keyboard composed of clips to key. When a key is pressed, a function is called and actions are performed. Later, I want to disable what key has been pressed by removing the listener. How can I do that dynamically using a string for the name of the listener function?
Allows a key
keyK.addEventListener (MouseEvent.CLICK, insertConsK);
Disable by deleting the listener. What is the correct syntax? char = 'k '.
MovieClip (root) ["key" + char.toUpperCase ()] .removeEventListener (MouseEvent.CLICK, "[insertCons" + char.toUpperCase ()]);
This ['key' + char.toUpperCase ()] .removeEventListener (MouseEvent.CLICK, this ['InsertCons' + char. toUpperCase()])
But if each key has it's own listener function, just use e.currentTarget to the listener function and the function name hardcord.
Tags: Adobe Animate
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Removing event listeners - are they need all the time
My goal is to increase the performance of my project, so I would like to know if it's always a good idea to remove event listeners. Specifically, let's say I have a movie with several scenes and several frames in these scenes. Each image has an event listener:
Example:
Scene 1
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Framework 4 (EventListener)
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You must remove event if listeners is no longer necessary.
scenes do not yet exist in your published swf file. they exist only in the ide to help you organize your project, but the more advanced flash users avoid using scenes because they do nothing useful, once you get a deeper understanding of flash.
so, it makes no difference what the read head scene is because the flash player doesn't know which scene is that. those who are righteous (marked) frames on scenario main and each scene begins with a keyframe void (unless and until you put something in that keyframe).
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How to remove the object dynamically?
Hi all
I created an object dynamically. But I don't know how to remove dynamically in QML.
I called the function to "destroy ()", but I don't know it works or not. The code is as follows:
LogView.qml
import bb.cascades 1.0 ScrollView { id:logviewaaa signal addnewlog property variant number:100 property variant log1 property variant log2 property variant log3 property variant log4 property variant log5 property variant log6 property variant log7 property variant log8 property variant log9 property variant log10 onAddnewlog:{ number=logcontain.count() console.log("the log number is "+number) if(number == 0) { console.log("ready to add the first log"); log1 = log.createObject(logcontain); console.log("ready to add the first log"); logcontain.add(log1); }else if(number ==1){ log2 = log.createObject(logcontain) logcontain.add(log2) }else if(number ==2){ log3 =log.createObject(logcontain) logcontain.add(log3) }else if(number ==3){ log4=log.createObject(logcontain) logcontain.add(log4) }else if(number == 4){ log5=log.createObject(logcontain) logcontain.add(log5) }else if(number ==5){ log6=log.createObject(logcontain) logcontain.add(log6) }else if(number ==6){ log7=log.createObject(logcontain) logcontain.add(log7) }else if(number ==7){ log8=log.createObject(logcontain) logcontain.add(log8) }else if(number ==8){ log9=log.createObject(logcontain) logcontain.add(log9) }else if(number ==10){ log10=log.createObject(logcontain) logcontain.add(log10) } } Container{ id:logcontain onCreationCompleted:{ } attachedObjects:[ ComponentDefinition{ id:log source:"Log.qml" } ] } }
Log.QML:
import bb.cascades 1.0 Container { id:root signal deletethislog TextArea{ id:recordlog inputMode:TextAreaInputMode.Text } Container { id:buttoncontain layout: StackLayout { orientation: LayoutOrientation.LeftToRight } Button { id: edittext imageSource: "asset:///icons/ic_edit.png" onClicked: { recordlog.editable = true } } Button { id: oktext imageSource: "asset:///icons/ic_done.png" onClicked: { recordlog.editable = false } } Button{ id:deletetext imageSource: "asset:///icons/ic_delete.png" onClicked: { destroy() } layoutProperties: AbsoluteLayoutProperties { } horizontalAlignment: HorizontalAlignment.Right } } onCreationCompleted:{ } }
Thank you.
brad_qqq
I solved this problem. I always use "destroy()" function to solve. The code is as follows:
LogView.qml
import bb.cascades 1.0 ScrollView { id:logviewaaa signal addnewlog property variant number:100 property variant log1 property variant log2 property variant log3 property variant log4 property variant log5 property variant log6 property variant log7 property variant log8 property variant log9 property variant log10 onAddnewlog:{ number=logcontain.count() console.log("the log number is "+number) if(number == 0) { console.log("ready to add the first log"); log1 = log.createObject(logcontain); console.log("ready to add the first log"); logcontain.add(log1); log1.objectaaa=log1 log1.maincontain=logcontain }else if(number ==1){ log2 = log.createObject(logcontain) logcontain.add(log2) log2.objectaaa = log2 log2.maincontain = logcontain }else if(number ==2){ log3 =log.createObject(logcontain) logcontain.add(log3) log3.objectaaa = log3 log3.maincontain = logcontain }else if(number ==3){ log4=log.createObject(logcontain) logcontain.add(log4) log4.objectaaa = log4 log4.maincontain = logcontain }else if(number == 4){ log5=log.createObject(logcontain) logcontain.add(log5) log5.objectaaa = log5 log5.maincontain = logcontain }else if(number ==5){ log6=log.createObject(logcontain) logcontain.add(log6) log6.objectaaa = log6 log6.maincontain = logcontain }else if(number ==6){ log7=log.createObject(logcontain) logcontain.add(log7) log7.objectaaa = log7 log7.maincontain = logcontain }else if(number ==7){ log8=log.createObject(logcontain) logcontain.add(log8) log8.objectaaa = log8 log8.maincontain = logcontain }else if(number ==8){ log9=log.createObject(logcontain) logcontain.add(log9) log9.objectaaa = log9 log9.maincontain = logcontain }else if(number ==10){ log10=log.createObject(logcontain) logcontain.add(log10) log10.objectaaa = log10 log10.maincontain = logcontain } } Container{ id:logcontain onCreationCompleted:{ } attachedObjects:[ ComponentDefinition{ id:log source:"Log.qml" } ] } }
Log.QML:
import bb.cascades 1.0 Container { id:root //objectName:"thislog" signal deletethislog property variant objectaaa property variant maincontain TextArea{ id:recordlog inputMode:TextAreaInputMode.Text } Container { id:buttoncontain layout: StackLayout { orientation: LayoutOrientation.LeftToRight } Button { id: edittext imageSource: "asset:///icons/ic_edit.png" onClicked: { recordlog.editable = true } } Button { id: oktext imageSource: "asset:///icons/ic_done.png" onClicked: { recordlog.editable = false } } Button{ id:deletetext imageSource: "asset:///icons/ic_delete.png" onClicked: { selfdestroy() } layoutProperties: AbsoluteLayoutProperties { } horizontalAlignment: HorizontalAlignment.Right } } onCreationCompleted:{ deletetext.clicked.connect(deletethislog) } function selfdestroy(){ objectaaa.destroy() maincontain.remove(objectaaa) } }
brad_qqq
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I'm confused about something. My Essential Action Script book mentions that you should really remove all registry event listeners when you use is no longer the component when it is defined. It applies even if its parent container is removed and you set the null object? The garbage collector should not take care to destroy the event listener registered as well since it was registered in the component that you have set to null?
When you set a component to null, what you are defining this particular reference to null, is no no not the object itself null. The event listener maintains a reference to the component, and given that the number of references so that the object is greater than zero, it is not the garbage collector.
You can work around this problem by setting the useWeakReference flag in the call addEventListener() to true. Be careful with this, however. If you use a weak reference, and do not remove the event listener, you can always react to events lifted between the time when it is removed and when he is recovered by garbage collected. It is generally safe, but if there are events that are triggered by a timer, that could be a problem.
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How to remove events from the life of person!
Dear gurus,
I want to serve an employee, but demand gives error of child row (life events). When I go to the form of manifestations of life person, I can't remove the processes and events that performed on it as delete the button is disabled.
Can someone tell me how can I delete an event in the lives of people so in turn, I can purge a wrongly created employee.
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Muhammad Noman moomoYou need to use the rule of selection person to pick up the correct employees. Use the commit.
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remove event listeners by leaving a framework
Hi team,
I'm having a bit of trouble, I modded l some code that I'm really happy, he made buttons bounce around the user trying to click on when you enter a certain range...
Problem... I noticed tha the ENTER_FRAME eventlisteners adds code to make it work, when you leave this image there are now problems with null objects because the listeners are always, but the objects are no longer there...
OK so tried solution - I use a currentLabel on the main timeline to check if the frame is reached, then use a function if (label is x) put on other listeners take OFF work... but then I have to have these hidden objects on the timeline and then add visible = true/false to my interlocutor of framelabel... It works, but a part of my feature here is that these clips that move are keys that the user clicks on and they explode and disappear - but now they don't because I have a code that says this image they must be visible...
The only thing I can think is to have an empty frame at the end of the break-up and put an end to this topic. Then add a gotoAndPlay (1) in my code to frame label. Looks very ugly, that you guys got a better way? I can remove it after a setting eventlisteners? Is there a code like LEAVE_FRAME?
see you soon
void
Use the removedfromstage event:
amovieclipwithanenterframeevent.addEventListener (Event.REMOVED_FROM_STAGE, removedF);
function removedF(e:Event):void {}
e.currentTarget.removeEventListener (Event.ENTER_FRAME);
e.currentTarget.removeEventListener (Event.REMOVED_FROM_STAGE);
}
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How to remove all the dynamic variables of a movieclip?
I have the movieclip:
mcGrazerwith a certain dynamic variables like this:
mcGrazer.var1
mcGrazer.var2
etc.
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delete mcGrazer;
It does not remove the variables.
But if I use:
delete mcGrazer.var1
It removes this individual variable.
is there a way to destroy information (variables) to a particular movieclip?
Thank you.
You can use:
function deleteVariablesF(mc:MovieClip):Void {}
for (var s:String MC) {}
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Hello!
I have a window PopUpManager which triggers an event just before closing (not the CloseEvent).
I'm listening to this event and manipulate in a function.
Q: is it better to remove the listener service that manages or calling the PopUpManager. removePopUp this popup automatically "clean" so?
Thank you!
A listener simply creates a reference since the dispatcher to the listener.
In the code below, it is today a reference of "victory" to the class who
has "myHandler" which is the document, so adding this listener will not
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removeChild removes the object event listeners?
Hello
If you dynamically create a parent movieclip, dynamically add a selector of color of each element and add an event listener for each color picker, a removeChild on the parent movieClip removes event listeners belonging to one of her children?
Thank you
Shaun
It should not. You only delete the object from the display list, not existence. It's still there, you don't see it, but you can bring it to life too fast that reuse addChild.
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How to remove old calendar events
How to remove events calendar 2010, 2011, 2012, 2013, 2014, and 2015 before December 1.
Fl3450,
Make a backup of your calendar. Calendar > File > Export > Calendar Archive...
Type a. in the calendar search field.
Your events should be listed from oldest to newest in the results column. Click outside the results column or use the "esc" key to eliminate search results. The results column must always be visible.
Highlight the oldest event in the results column and click it. Scroll up to "before December 1" and shift click on this event. Press the "DELETE" key and your old events will disappear.
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How to remove a Custom DDL or ObjectChoiceField
Hi all
I am doing a shopping basket sort of thing...! for this I need to change the dropdownlists dynamically on the selection.
!) When the user selects the button category, main ddl should be updated.
(2) when the user selects a subacaegory of DOF, DOF sub must be courses.
I realized this some how... dynamically, I changed the reference to the ddl and updated. It works fine but the problem is, when an another DOF makes its appearance the previous is there remain only and a new is overwhelming at this point. as a result when the width of the new ddl is lower than the previous ddl, it appeared in her underwear, which kills the look and feel of the screen.
in some ways, I tried to remove the ddl, but it does not work for me.
Please suggest me how to remove the ddl dynamically, when I try to remove it, it gives IllegalArgumentException meaning is the ddl
not this Manager field. I'm removing the same administrator only, but I have not found why it's happening...!
Please help me! Here is my
It's my custom ddl code.
public class CustomComboBox extends ObjectChoiceField { private int width; public boolean itemadded = false; // CustomComboBox()// {//// super("Currency",curr, 0, ObjectChoiceField.FIELD_LEFT);// } public CustomComboBox(String str,String []curr, int width) { super(str, curr, 0, ObjectChoiceField.FIELD_LEFT | ObjectChoiceField.USE_ALL_WIDTH); this.width = width; Font font = this.getFont().derive(Font.EMBOSSED_EFFECT | Font.BOLD, 14); this.setFont(font); } public CustomComboBox(String str,String []curr, int startindex, int width) { super(str, curr, startindex, ObjectChoiceField.FIELD_LEFT | ObjectChoiceField.USE_ALL_WIDTH); this.width = width; Font font = this.getFont().derive(Font.EMBOSSED_EFFECT | Font.BOLD, 14); this.setFont(font); } protected void layout(int width, int height) { setExtent(this.width, 40); } public void paint(Graphics g) { // g.setBackgroundColor(Color.BLUE);// g.clear(); g.setColor(Color.BLACK); super.paint(g); } public void setVisiblity(boolean on) {// this.setVisualState(VISUAL_STATE_DISABLED);// this.setVisualState(VISUAL_STATE_DISABLED_FOCUS); } protected void fieldChangeNotify(int context) { try { this.getChangeListener().fieldChanged(this, context); } catch (Exception exception) { } } }
This is the place where to use this object class
class ItemList extends Manager implements FieldChangeListener{ SubItemList subitems; String []cycleitems = {"Standard", "Kids", "Racers"}; String []spareitems = {"Tyres", "Tubes", "Covers"}; String []healthitems = {"Medicines","Fruits","Drinks"}; String []fitnessitems = {"Walker", "Dumbles"}; String []empty = {" "}; CustomComboBox ddl_cycle, ddl_spares, ddl_fitness, ddl_health, ddl; MyTextField lbl_subcategory;// CustomTextBox txt_qty; ItemList(int index) { super(Manager.VERTICAL_SCROLL | Manager.HORIZONTAL_SCROLL); subitems = new SubItemList(index,0); ddl_cycle = new CustomComboBox("Cycles", cycleitems, 140); ddl_spares = new CustomComboBox("Spares", spareitems, 140); ddl_health = new CustomComboBox("Health", healthitems, 140); ddl_fitness = new CustomComboBox("Fitness", fitnessitems,140); ddl = new CustomComboBox("",empty ,100); lbl_subcategory = new MyTextField("Sub-Category:",Field.FIELD_LEFT, 16);// lbl_qty = new MyTextField("Qty", Field.FIELD_LEFT, 16);// txt_qty = new CustomTextBox(30,20); ddl_cycle.setChangeListener(this); ddl_spares.setChangeListener(this); ddl_health.setChangeListener(this); ddl_fitness.setChangeListener(this); switch(index) { case 0: ddl = ddl_cycle; break; case 1: ddl = ddl_spares; break; case 2: ddl = ddl_health; break; case 3: ddl = ddl_fitness; break; } add(lbl_subcategory); add(ddl); add(subitems); } public void delItems() { subitems.delSubItems(); deleteAll(); } public void setvisibility(boolean on) { ddl.setVisiblity(false); } protected void sublayout(int width, int height) { if(lbl_subcategory != null) { setPositionChild(lbl_subcategory, 0, 25); layoutChild(lbl_subcategory, getScreen().getWidth(), getScreen().getHeight()); } setPositionChild(ddl, 110, 15); layoutChild(ddl, getScreen().getWidth(), getScreen().getHeight()); if(subitems != null) { setPositionChild(subitems, 0, 60); layoutChild(subitems, getScreen().getWidth(), getScreen().getHeight()); } setExtent(360, 150); }
This is the place where works the dynamic change of ddl
class OrderEntryManager extends Manager implements FieldChangeListener{ ItemList items; ButtonField btn_submit; MyButtonField btn_cycles, btn_spares, btn_health, btn_fitness, btn_go; OrderEntryManager(){items = new ItemList(0);btn_cycles = new MyButtonField("Cycles", "orderimg/cycle.png", "orderimg/cycle.png",0x00FFE7AD); btn_spares = new MyButtonField("Spares", "orderimg/spares.png", "orderimg/spares.png",0x00FFE7AD); btn_fitness = new MyButtonField("Fitness", "orderimg/fi.....); add(items); }public void fieldChanged(Field field, int context) { if(field instanceof MyButtonField) { if (((MyButtonField) field).getLabel().equalsIgnoreCase("Cycles")) {// items.delItems();// this.delete(items);// items.setVisualState(VISUAL_STATE_DISABLED); items.setvisibility(false); items = new ItemList(0); add(items); } else if (((MyButtonField) field).getLabel().equalsIgnoreCase("Spares")) {// items.setVisualState(VISUAL_STATE_DISABLED);// items.setvisibility(false); items = new ItemList(1); add(items);// items = itemsnew; } else if (((MyButtonField) field).getLabel().equalsIgnoreCase("Health")) {// items.setVisualState(VISUAL_STATE_DISABLED);// items.setvisibility(false); items = new ItemList(2); add(items);// items = itemsnew; } else if(((MyButtonField) field).getLabel().equalsIgnoreCase("Go")) { } else if (((MyButtonField) field).getLabel().equalsIgnoreCase("Fitness")) {// items.setVisualState(VISUAL_STATE_DISABLED);// items.setvisibility(false); items = new ItemList(3); add(items);// items = itemsnew; } } else if (field instanceof ButtonField) {// if (((ButtonField) field).getLabel().equalsIgnoreCase("Fitness"))// {// items = new ItemList(3);// add(items);// // items = itemsnew; // } if(((ButtonField) field).getLabel().equalsIgnoreCase("Submit")) { synchronized(Application.getEventLock()) { UiApplication.getUiApplication().popScreen(UiApplication.getUiApplication().getActiveScreen()); UiApplication.getUiApplication().pushScreen(new OrderConfirmScreen()); } } } if(items != null) { updateLayout(); } } }
Please suggest me how to remove the ddl for this!
Hi all, I have solved this problem by using ddl.setChoice (String []);
Thank you for all that you.
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To access the event listeners in the custom class
I am a construction and film using the classes customized for the first time. I built a custom class and bound a clip in my film for her so that the color of the text in the video will change when he is overthrown. I have 10 occurrences of this clip in the film, so it saves me a lot of code. Instead of writing 10 to ROLL_OVER event listeners and 10 more for ROLL_OUT (as I have done in the past), one for each instance of the clip on the scene, I wrote now event listeners and the corresponding functions in the custom class. So far, so good, everything works fine. When I ride above and outside on one of the 10 instances of the clip on the stage it changes color. See code attached.
However, according to what is happening in the film, that I sometimes need to turn off the headphones of events on one or more video clips. So, I wrote the code in the movie itself to remove event listeners of the instance of the clip that I need to disable. See code attached.
But, alas, it does not work.
I get this error:
ReferenceError: Error #1065: Variable turnWhite is not defined.
I thought that by the 'public' method in the custom class, I would be able to call from the film, but I do not. Any help or advice would be greatly appreciated. Thank you very much.Ned, thanks for your help. I was able to understand. Your code has been helpful, and I've used something similar to what you suggested.
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How to remove base class event listeners
Guys, I have a base class (he is a clip) in which I added event listeners:
addEventListener (MouseEvent.MOUSE_OVER, mouseOverHandler);
OK, it works and everything is beautiful.
But I have a subclass that clip in class 'regular ': as3
class DifferentClass extends MyMovieClip
{
}
you get the gist.
Now, I want in my DifferentClass also have the MOUSE_OVER event, but without never to raise the base class event.
No one knows how to do?
Thank you.
override protected function mouseOverHandler(e:MouseEvent):void {}
do not call super. Instead, do your own thing custom
}
No need to call getQualifiedClassName. This is what has protected methods are for!
Note You can also listen to a higher priority and the preventImmediatePropogation() on the event if for any reason any substitution does not work for you.
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How to remove an event listener
I have a series of buttons. When a button is clicked, a component (instructorView) is loaded into a container named passageContainer:
passageContainer.addChild (instructorView);
Every time I load a new component, I remove the component of the old first:
passageContainer.removeAllChildren ();
The component includes an eventListener that is raised when a key is pressed.
The first time I load a component and you press a button, the event is triggered once.
The second time that the event is triggered two times.
The third time the event is fired three times and so on.
I'm almost certain that the eventListeners are not removed even if the components are removed. And event listeners to perform several times.
Is it possible for the eventListeners to stay after the components have been removed? If so, how can I remove them?
Thank you!
This means that the components are always in memory, they are tightly coupled, you need to makesure that the event listeners are weakly couples/weakreferenced.
http://www.Selikoff.NET/2010/09/21/Flex-event-handlers-and-weak-references/
(OR) to remove the earphones manually, by this.removeEventLIstener (on each component for all events that are saved in the component before remove you it from memory.
Post edited by: saisri2k2
-
Hi there everyone,
I have a question which I hope you guys can help me with, so the question is:
"How to remove us (sprite object that has an external swf that it is child) display and, above all, of the memory, but we can still use the same variable to add another object (yes another sprite like the one we have removed yet a different content)..,I did tried the removeChildAt thing he did remove all the child of the display list, but I still can hear the sound of the video running.
Here is the code on a small scale of what I do (sorry that I can only give you chunk code loading and adding)
var SWFList:XMLList; used to contain a list of all the external swf source, atribute and etc.
var totalSWF:int; the total number of swf external, it must be chargedvar swfLoader:Loader; instance of the loader class to load external swf file
function loadSWF (): void
{
for (var i: Number; i < totalSWF; i ++)swfLoader = new Loader();
swfLoader.contentLoaderInfo.addEventListener (Event.COMPLETE, onSWFLoadComplete);
swfLoader.load (new URLRequest (SWFList [i], .@source));
}function onSWFLoadComplete(e:Event):void
{
this.stage.addChild (e.target.content);
}
and also if you can give an example of a good method of dynamic add the object to the stage I would really appreciate cause I suspect mine are bad method.
Thank you all.
If you have been publishing for fp 10, just use unloadAndStop().
I assume you're not publication for fp 10 so you have to use something like:
function clearScreen (): void
{
var mc:MovieClip = MovieClip (swfLoader.content);MC.yourflvintheloadedswf.Stop ();
mc.mcinyourloadedswfthathasalistener.removeEventListener (MouseEvent.CLICK, whateverF);
etc.
swfLoader.unload ();
}
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