event-handling

问题 I am successfully able to react to keyboard events through my window controller's keyDown: method. The problem arises while performing a mouse drag: Keyboard events seem to be delayed and will only fire on mouse up. To be clear, what I mean is: • place a log statement in you window controller's keyDown: method • launch your app, perform some drag operation (on a NSSlider for ex.) • while maintaining the drag, press any key: nothing logs to the console. • release drag : logs appear, yay… The

问题 I have a simple form like this: <form id='myForm'> <input type='text' name='Textbox'> <select name='SelectBox'> <option class='option1'>option 1</option> <option class='option2'>option 2</option> </select> </form> I want to capture this form's Textbox focus lost (blur) event and SelectBox change event. I don't want to apply change event for whole form because it causing to submit form more than one time. 回答1: Add id='SelectBox' to your select box and id='Textbox' to your text box and try the

问题 I have a simple form like this: <form id='myForm'> <input type='text' name='Textbox'> <select name='SelectBox'> <option class='option1'>option 1</option> <option class='option2'>option 2</option> </select> </form> I want to capture this form's Textbox focus lost (blur) event and SelectBox change event. I don't want to apply change event for whole form because it causing to submit form more than one time. 回答1: Add id='SelectBox' to your select box and id='Textbox' to your text box and try the

问题 WM_GETMINMAXINFO is generated when maximize operation is about to begin and WM_SIZE when maximize operation is finished. WM_SIZE is also generated when restore operation is finished. But how to detect window restore operation is about to begin? I need detect exact moment when window is about to restore , but not the moment when already restored. I am developing multithread DirectX application. I render in dedicated secondary thread. When window is about to begin maximize or restore I need to

问题 This has already been asked here, but I am just not satisfied with the answer given. I am currently adding a custom context menu to Outlook. The code is as follows: void Application_ItemContextMenuDisplay(Microsoft.Office.Core.CommandBar CommandBar, Microsoft.Office.Interop.Outlook.Selection Selection) { if (Online) { foreach (string category in FilingRuleManager.FilingRuleCategories) { Office.CommandBarPopup cb = CommandBar.Controls.Add(Office.MsoControlType.msoControlPopup, missing, missing

问题 Here is come code to demo my problem: Parent class: import java.awt.Color; import java.awt.Dimension; import java.awt.GridLayout; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import javax.swing.JFrame; import javax.swing.JPanel; public class PPanel extends JPanel{ private APanel panel1; private APanel panel2; private APanel panel3; public PPanel() { this.setLayout(new GridLayout(0,1)); panel1 = new APanel(); panel1.setLayout(new GridLayout(0,1)); panel2 = new APanel(

问题 I'm trying to figure out how to execute some js code when an element is removed from the page: Something in prototype like: $('custom-div').observe('remove', function(event) { // Handle the event }); Does anything like this exist? 回答1: In modern browsers, you can use a MutationObserver . Here's code that will call a callback when a DOM element is removed from it's current location: function watchRemove(el, fn) { var observer = new MutationObserver(function(mutations) { mutations.forEach

问题 I have in my application a data template that has a few buttons. I want those buttons' even handler to be fired in the current page (I am using this template in many pages) rather than in the Application.xaml.vb/cs file, since I want different actions on each page. I hope I am clear. 回答1: You can use commanding to achieve this. Have the Button s in the DataTemplate execute specific Command s: <Button Command="{x:Static MyCommands.SomeCommand}"/> Then have each view that uses that DataTemplate

问题 I have what I thought was a cross-browser solution to capturing the enter key in a chat script I'm making, here it is: nn=(document.layers)?true:false; ie=(document.all)?true:false; function keyDown(e) { var evt=(e)?e:(window.event)?window.event:null; if(evt){ var key=(evt.charCode)?evt.charCode: ((evt.keyCode)?evt.keyCode:((evt.which)?evt.which:0)); if(key=="13") document.getElementById('chatEnter').submit(); } } document.onkeydown=keyDown; if(nn) document.captureEvents(Event.KEYDOWN); I got

问题 I have two event handlers wired up to a button click in a Windows form like so: this.BtnCreate.Click += new System.EventHandler(new RdlcCreator().FirstHandler); this.BtnCreate.Click += new System.EventHandler(this.BtnCreate_Click); both are being called correctly. However is it possible within FirstHandler() to prevent BtnCreate_Click() being executed? Something like: void FirstHandler(object sender, EventArgs e) { if (ConditionSatisfied) //Prevent next handler in sequence being executed } I