mousewheel | 易学教程

jquery vertical mousewheel smooth scrolling

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问题 I'm making a parallax website and I would like to make the page scroll smoother with the mousewheel for a better user experience. The best example I could get was this website: http://www.milwaukeepolicenews.com/#menu=home-page It would be great if I could get something similar to that into my website, the smooth vertical scrolling and scroll inertia. I noticed they are using Brandon Aaron's jQuery mousewheel which is very light but I'm just a beginner and cannot make it work by myself. Also

C# - how do I prevent mousewheel-scrolling in my combobox?

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问题 I have a combobox and I want to prevent the user from scrolling through the items with the mousewheel. Is there an easy way to do that? (C#, VS2008) 回答1: Use the MouseWheel event for your ComboBox: void comboBox1_MouseWheel(object sender, MouseEventArgs e) { ((HandledMouseEventArgs)e).Handled = true; } Note: you'll have to create event in code: comboBox1.MouseWheel += new MouseEventHandler(comboBox1_MouseWheel); 回答2: For WPF, handle the PreviewMouseWheel event instead. It would also be a good

Normalizing mousewheel speed across browsers

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For a different question I composed this answer , including this sample code . In that code I use the mouse wheel to zoom in/out of an HTML5 Canvas. I found some code that normalizes speed differences between Chrome and Firefox. However, the zoom handling in Safari is much, much faster than in either of those. Here's the code I currently have: var handleScroll = function(e){ var delta = e.wheelDelta ? e.wheelDelta/40 : e.detail ? -e.detail/3 : 0; if (delta) ... return e.preventDefault() && false; }; canvas.addEventListener('DOMMouseScroll',handleScroll,false); // For Firefox canvas

jquery mousewheel: detecting when the wheel stops?

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问题 I\'m using Jquery mousewheel plugin and I would like like to be able to detect when the user has finished using the wheel. Similar functionality as the stop: event in the draggable stuff. Can somebody point me to the right direction? 回答1: There's no "stop" event here really - you get an event when you do scroll, so every time a mousewheel event happens the event is triggered...when there's nothing you'll get no events and your handler won't be firing. You ca however detect when the user hasn

How to perform Mouse Wheel scrolling over HTML5 Canvas in Selenium?

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问题 I am working on a GWT Application (similar to Paint). In this, I have an HTML5 Canvas in which there is a functionality that scrolling a mousewheel up and down will zoom in and out of the canvas. I have searched a lot but didn\'t find a workaround to fix this issue. Here\'s what did: int PosX = 0; int PosY = 10; JavascriptExecutor executor = (JavascriptExecutor) getDriver(); String script = \"document.getElementById(\'frontCanvas\').scrollBy(\" + PosX + \",\" + PosY + \")\"; executor

How to add mouse wheel support to a component descended from TGraphicControl?

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问题 I have created a delphi component which descends from TGraphicControl. Is it possible to add support for mouse wheels? --- Edit --- I\'ve exposed the MouseWheel events as shown below but they aren\'t called. TMyComponent = class(TGraphicControl) published property OnMouseWheel; property OnMouseWheelDown; property OnMouseWheelUp; end; --- Edit --- As suggested below, I\'ve tried to trap the WM_MOUSEWHEEL and CM_MOUSEWHEEL messages, but it doesn\'t seem to work. However I\'ve managed to trap

Python tkinter binding mousewheel to scrollbar

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问题 I have this scroll-able frame (frame inside canvas actually). import Tkinter as tk class Scrollbarframe(): def __init__(self, parent,xsize,ysize,xcod,ycod): def ScrollAll(event): canvas1.configure(scrollregion=canvas1.bbox(\"all\"),width=xsize,height=ysize,bg=\'white\') self.parent=parent self.frame1=tk.Frame(parent,bg=\'white\') self.frame1.place(x=xcod,y=ycod) canvas1=tk.Canvas(self.frame1) self.frame2=tk.Frame(canvas1,bg=\'white\',relief=\'groove\',bd=1,width=1230,height=430) scrollbar1=tk

Mousewheel event in modern browsers

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问题 I\'d like to have clean and nice JavaScript for mousewheel event, supporting only the latest version of common browsers without legacy code for obsolete versions, without any JS framework. Mousewheel event is nicely explained here. How to simplify it for the current latest versions of the browsers? I don\'t have access to all browsers to test it, so caniuse.com is a great help to me. Alas, mousewheel is not mentioned there. Based on Derek\'s comment, I wrote this solution. Is it valid for all

How can I differentiate a manual scroll (via mousewheel/scrollbar) from a Javascript/jQuery scroll?

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问题 UPDATE: Here is a jsbin example demonstrating the problem. UPDATE 2: And here is the fixed version thanks to fudgey. Basically, I have the following javascript which scrolls the window to an anchor on the page: // get anchors with href\'s that start with \"#\" $(\"a[href^=#]\").live(\"click\", function(){ var target = $($(this).attr(\"href\")); // if the target exists: scroll to it... if(target[0]){ // If the page isn\'t long enough to scroll to the target\'s position // we want to scroll as

How to direct the mouse wheel input to control under cursor instead of focused?

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问题 I use a number of scrolling controls: TTreeViews, TListViews, DevExpress cxGrids and cxTreeLists, etc. When the mouse wheel is spun, the control with focus receives the input no matter what control the mouse cursor is over. How do you direct the mouse wheel input to whatever control the mouse cursor is over? The Delphi IDE works very nicely in this regard. 回答1: Try overriding your form's MouseWheelHandler method like this (I have not tested this thoroughly): procedure TMyForm