event-handling

问题 I would like to cancel the activation of some page, when x!=y is met. I am trying to do this with EventHandler . The author clicks on activate Page in the sidekick , and my EventHandler gets a replication event and tests if x!=y . If this is met, the page activation has to be canceled. My question is how do I cancel the page activation? @Component(immediate = true, label = "TEST") @Service @Property(name = "event.topics", value = { ReplicationAction.EVENT_TOPIC }) public class EventHandler

问题 Hi I want to know how I can detect a swipe gesture using javascript. I dont want to use a separate library for this since I have the event object from my javascript callback at my disposal, which has everything I need such as deltaX, deltaY & absDeltaX & absDeltaY. My problem is what bounds do I need to set so that I can differentiate a swipe gesture from other gestures such as scrolling. This is a problem because sometimes when a user tries to swipe across the screen they also create a

问题 Hey everyone, I'm a newbie and I have what I anticipate will be a pretty easy question to answer. In order to learn a bit about event handling and drawing, I'm attempting to write a program that draws a black rectangle that increases in length every time the user hits the 'c' key. So far it just draws a black rectangle on a blue background without responding to keystrokes. Here is what I have so far: Input.h #import <Cocoa/Cocoa.h> @interface Input : NSView { int length; } - (void)keyDown:

问题 I've been studying a lot of the common ways that developers design/architect an application on domain driven design (Still trying to understand the concept as a whole). Some of the examples that I saw included the use of events via an event aggregator. I liked the concept because it truly keeps the different elements/domains of an application decoupled. A concern that I have is: how do you rollback an operation in the case of an error? For example: Say I have an order application that has to

问题 I have recognized, that eventhandler added with addEventListener where not influenced by $.trigger . The special reason for that question is, that I have several self created html elements which implements some logic without using external libraries (only pure js). Now in my main project I want to use these controls and further there I have external libaries like jQuery. Now for example I want to trigger the change event (remember...events are added with element.addEventListener("event",

问题 import java.awt.Color; import java.awt.Dimension; import javax.swing.JPanel; import javax.swing.Timer; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartMouseEvent; import org.jfree.chart.ChartMouseListener; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.entity.ChartEntity; import org.jfree.chart.plot.PiePlot; import org.jfree.chart.plot.PiePlot3D; import org.jfree.data.general.DefaultPieDataset; import org.jfree.data.general

问题 Event objects passed to event handler callbacks contain an event.timeStamp of when the event occurred, but where is the timestamp produced? Is it something that bubbles up from the underlying OS, or is it generated by the browser? I'm interested in gauging the reliability of the timestamp and recognise that the later the timestamp is produced the less accurate it's likely to be. Also, does the way in which the timestamp is produced vary significantly between platforms and browser

问题 this is the question: I have an iframe that displays any web page (not necessarily developed by me). On this page may be attached events (which presumably I do not know). how can I dynamically intercepting these events and store them for later replicate? for example: suppose that when the mouse moves over a certain div it changes color. I would like to make sure that when you trigger the event that would change color to the div it is "registered" with all A series of information that will

问题 UserControl: private string lastName; public string LastName { get { return lastName; } set { lastName = value; lastNameTextBox.Text = value; } } Form: using (SqlConnection myDatabaseConnection = new SqlConnection(myConnectionString.ConnectionString)) { myDatabaseConnection.Open(); using (SqlCommand SqlCommand = new SqlCommand("Select LasatName from Employee", myDatabaseConnection)) { int i = 0; SqlDataReader DR1 = SqlCommand.ExecuteReader(); while (DR1.Read()) { i++; UserControl2 usercontrol

问题 I have a custom control that gets focus when the form is loaded. It uses validating event on it that handles it being left empty or having invalid data entered. My problem is, when the user loads the form, then just closes it, it is going through the validation process and displaying errors because it is left empty. On the BaseForm (: Form) we have overwritten the WndProc method and set a flag on the form to say it is closing, now in the validating event handler I can get the parent form and