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Questions tagged [eventhandler]

In object-oriented programming languages (such as C++, Lazarus Pascal or Visual Basic), visual objects (or components) can respond to *events* (usually) by the user. An event handler is the block of code that runs when an event occurs. Eg: *Onclick* event for a command button.

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Using showAndWait in the onFinished EventHandler of an Animation doesn't work

In JavaFx, I want to show a modal dialog after an animation ends. For some reason, calling showAndWait in the EventHandler that gets executed after the animation ends doesn't work. A new window is shown, but it seems like nothing is drawn inside…
bmesuere
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Subscribing Methods to Events from another Class in C#

Hello swarm intelligence! Imagine the following: We've created a rudimentary server / client software to send Events through a local network to invoke Methods in another Program. This is done via an array of Bytes build like:…
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Are C# events feasible for domain events in DDD?

I read that people use event dispatching libraries for domain events in their domain-driven design. The C# language have built-in support for events using the event keyword together with the EventHandler<> class. Is it feasible to use this instead…
Fred
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How to resolve LazyInitializationException in Spring data rest @RepositoryEventHandler @HandleAfterLinkSave?

I have a spring data rest application with relation between types Match and Round @Entity public class Match { @OneToMany private List rounds; ... } When a link is created between a match and a round, e.g. like this curl -X PUT…
cybodelic
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WPF CroppedBitmap + RenderTargetBitmap = EventHandler leak problem and Freeze problem too

I am wondering if there is a .net EventHandler leak surrounding CroppedBitmap and RenderTargetBitmap. It's causing me a huge nightmare! My WPF app runs an always running render call at 60fps. I noticed that after a time, the content being rendered…
Martin B
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event vs eventhandler in javascript

My teacher says that onclick in javascript is an event and an event handler. But i'm not able to agree with her, I find them to be different but can't distinguish properly.Have done a ton of google search , couldn't find anything relevant. So…
GARIMA JAIN
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c# for-loop and Click Event Handler

How do I use one individual event handler per iteration, without hard coding the functions? for (int i = 0; i < 100; i++) { //other code PictureBox listItem = new PictureBox(); listItem.Click += new EventHandler((sender2, e2)…
Reese
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Remove eventHandler that was added using lambda expression

I have a control that I added an event to. However, I needed to pass some extra parameters to the event method, so I use lambda expression like it was described here: Pass parameter to EventHandler comboBox.DropDown += (sender, e) =>…
Karlovsky120
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One Event Handler for multiple JButtons

I want to add an EventHandler for multiple JButtons in Java. I use a JButton array JButton[] buttons = new JButton[120]. I used this solution for (int i=0; i
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How to find pictureBoxes in the form and add specific EventHandler to them

I want to have a picture album that when I click any picture it goes to another form to edit that picture. Now I have some pictureBoxes in the form with the names like PB0, PB1, PB2,... and a method like this private void msgShow(int id) { …
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Efficiency: one event handler or multiple

There is a question with a good answer about binding multiple objects to a click event here, but the answer deals with only buttons inside a container. I am wondering what happens if there is a more complex structure, with elements inside the…
Michel
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Run a function after an on.change event

I have something like this: $('#select1').on('change', function() {}) and it works fine. However, I need to run another function after the function has completed. I thought about taking the function contents, and putting it in a named function, then…
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Is there a numericupdown event for value increasing in c#

I need an event that happens when the up arrow is pressed and another when the down arrow is pressed. is there an event handler for this? all I can find is valuechanged?
john
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how to override built in event handler in WPF c#

In my project, I want to override Touchup Event Handler which is build in the WPF. I do not know how to override this event handler for my own use. Is that possible? Someone could give some examples, I do not get some references or example about it.…
user2137886
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javascript addEventListener not working more than once

I'm trying to do a relatively simple javascript program/page, just 3 sliders RGB to affect the color of a square and circle. It works GREAT when I have the event listeners 'inline' with the input elements: i.e.,…
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