I want to show and hide an implemented object if a user press the key "0" in jogl how can I do it?
Simply add a key listener into the focused component exactly as you would do with any Java software using AWT and Swing. If you use NEWT, you'll have to use a key listener too anyway.
Then implement the method keyReleased(KeyEvent), modify the value of a boolean field when 0 is released and look at this value in GLEventListener.display(GLAutoDrawable) to determine whether to show or hide your object.
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I'm given a custom designed number pad in a React Native app and I need to implement text input functionality, just like the OS number pad/keyboard. The text input is a regular React Native TextInput with showSoftInputOnFocus={false} to prevent the real OS keyboard from appearing.
How can I create a key press event that will be handled correctly with the currently focused text input field, without recreating whole text input/handling logic from scratch?
I'm looking for something like (made up code):
function pressEvent(){
Keyboard.dispatchPressEvent(1); //such a method does not exist, made it up to demonstrate my needs
}
<Pressable onPress={pressEvent}><Text> 1 </Text></Pressable>
The closest I've found was Keyboard.emit for which almost no documentation exists.
I've ended up creating a controlled component where I've manipulated the business logic on parent and passed it to the text field.
Because my needs were simple (numeric entry, no caret position. much like a calculator) I was able to pull it off.
I want to check the list of event listeners that are added. For example, I used the code cy.on('pan zoom resize', update); and added function called update in for loop. I do this many times. I also call cy.off('pan zoom resize', update); to remove the event listeners but I want to be sure about it.
The only think I can think of is using console.log but this method might not be helpful.
I also think that in some places people forgot to remove the event listeners and just always added. With too many repetitions this might cause problems.
There is a data field in the private cytoscape object called listeners. You can see that if you:
console.log() the cy object,
navigate to _private,
then open the emitter object
and lastly go to listeners
This is the array listing all the default and user defined event listeners with some metadata like the event, type and scope of the listener.
You can access this in your code by simply calling
cy.emitter().listeners
The question now is, why do you need this information in the first place? Normally, you should be just fine if you call cy.off('eventXY', ...) before using any cy.on('eventXY', ...). Are you sure you need this for your application to work? Maybe elaborate more on the core problem (why you want these information in the first place).
Thanks and have a great day!
Is is possible to emit a synthetic event from a watched property in a way, that will not be checking the listeners (outside of Vue instance) on Vue instance initialization?
I have a situation in which I would like to watch for that synthetic event on a window object and perform a certain action on an object which does not exist at the time the Vue instance is created.
No matter how I try it to go about it I am getting an error:
Cannot read property 'set' of undefined
In my particular case, I want to 'move' the slider handle (I am using noUiSlider library) to a new position whenever the watched property changes - that is, the error message is specific, but my question refers to the generic case - is it possible? And if yes, how to do it?
For the listener to be able to operate on the slider, create the listener when you create the slider. There's no point to creating it before the slider exists.
As I know, selenium keyDown(keyUp) method is only available for keys in modifiers (SHIFT, ALT, CTRL). I need to press SPACE key a certain amount of time.
I have a questions about key event handling in Selenium keyboard interface.
1. Why selenium does not permit keydown and keyup event for other general keys ?
2. Is there any workaround to achieve this goal ?
For now, I used Robot class to implement this, but I don't want to use this.
since you didn't tell us which Selenium-binding you are using, I will show my examples in Java, you may transcode them into any binding you please:
you can press the SPACE key via the sendKeys() method:
driver.sendKeys(Keys.SPACE);
I don't know why you would want to use the keyDown() keyUp() methods for the "general keys" you are talking about, you can also use sendKeys() for most objectives:
driver.sendKeys("a");
You can use the Actions class if you want to combine normal key-actions with keyDown()/keyUp() actions
Actions action = new Actions(driver);
action.keyDown(Keys.CONTROL).sendKeys("c").keyUp(Keys.CONTROL).perform();
for example to copy something via CTRL+c...
I have a view which contains some tabs (TabView).
Initially some tabs are disabled - they should only be enabled when a certain condition is met.
I'd like to implement it in the following way:
Create a TabViewModel which contains a boolean (observable?) property PersonSelected.
Create a TabViewStore
Bind the TabViewStore to the TabView
In my controller I would have an action method (e.g. onPersonSelected) which will should set the PersonSelected property to true.
What is the best way to bind the PersonSelected property to the View?
As my store would only contain on record, I feel that using the is a bit overkill. Can I do this without the store?
You can simply subscribe to the change event of the UI element (checkbox? in your case). Am I missing something?