event-handling

问题 I have a ListBox with a TextBox above it. I would like to use the arrow keys to navigate from the ListBox to the TextBox. The intention is that if the first item in the ListBox is selected, and the user keys up, the TextBox will get focus. I nearly have this working, but the problem is that when the user keys up, the SelectedItem is changed before the KeyUp event is raised. This means that the navigation to the TextBox happens when the user has selected the second item in the ListBox. How can

问题 What am I missing here? Please note: jQuery MOBILE is used DEMO using preventDefault DEMO using return false If I use preventDefault the page loads as if I had just links and no script, when I change to return false (which I always used to use on the plain JS onclick event handler), it works as expected. I have already looked through other posts and all use .click and all suggest preventDefault. $(document).ready(function() { $("#leftdiv a").on("click",function(e) { $("#rightDiv").load(this

问题 It seems WindowEvent.WINDOW_SHOWN never gets dispatched on any of the nodes in the scene graph, nor is there anyway (that I could find) to know when a node is visible/rendered/shown. For example: TestLauncher.java package com.example.javafx.event; import javafx.application.Application; import javafx.fxml.FXMLLoader; import javafx.scene.Parent; import javafx.scene.Scene; import javafx.stage.Stage; public class TestLauncher extends Application { public static void main(String[] args) {

问题 I have the CurrentCellChanged event handler of a DataGridView and i want to be able to access the current selected cells column index from the event handler. I used to have the code in the CellClick handler which has DataGridViewCellEventArgs as a parameter so i was able to get the column index from the event args parameter but the CurrentCellChanged event has EventArgs as parameters which i believe is supposed to imply that theres no data for this event. Is there a way to access the new

问题 I'm creating buttons dynamically ... for(int i=0; i<colSize;i++){ final Button btn = new Button(this); btn.setText(SectionName[i]); btn.setTextSize(10); btn.setPadding(8, 3,8, 3); btn.setTextColor(Color.WHITE); btn.setTypeface(Typeface.SERIF, Typeface.BOLD); btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //***Every time that I click my button is selected !:) btn.setSelected(true); } }); } But how could I deselect the other buttons that were selected, I

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: jQuery: more than one handler for same event I am using a jQuery slider plugin that creates two buttons. These buttons have click events attached to them by the plugin as they are used to control the slider. I have created my own mouseover\mouseout events independent of the plugin (inline with the webpage) to handle animations. I would like to create one for click as well (so that the button changes color). Will

问题 I have a situation in my project where i have connect to multiple server and listen for events. Whenever a event received from the server, Handler should add the event to the common queue for processing. All connections should add received events to the queue. foreach(var item in collection) { Connection c = new connection(item); c.start(); c.EventReceived+=new EventHandler(myHandler); list.add(c); } protected void myHandler(eventArgs) { //add it to the concurrent queue } Here i doubt that

问题 In Matlab class it seems to be syntactically correct to declare property that is Dependent (computed not stored) and Observable in the same time. Consider code properties (Access = private) instanceOfAnotherClass end properties (SetAccess = private, Dependent, SetObservable) propertyTwo end methods function val = get.propertyTwo(this) val = this.instanceOfAnotherClass.propertyOne; end end Does this work as expected? That is, if the property propertyOne of an object stored in

问题 I've got a custom Button class, that always performs the same action when it gets clicked (opening a specific window). I'm adding a Click event that can be assigned in the button's XAML, like a regular button. When it gets clicked, I want to execute the Click event handler if one has been assigned, otherwise I want to execute the default action. The problem is that there's apparently no way to check if any handlers have been added to an event. I thought a null check on the event would do it:

问题 I've got a custom Button class, that always performs the same action when it gets clicked (opening a specific window). I'm adding a Click event that can be assigned in the button's XAML, like a regular button. When it gets clicked, I want to execute the Click event handler if one has been assigned, otherwise I want to execute the default action. The problem is that there's apparently no way to check if any handlers have been added to an event. I thought a null check on the event would do it: