scroll

问题 I'm trying to create an application with a zoomable/pannable canvas. Features : zoom in/out with mouse wheel at pivot points drag nodes around on the canvas with left mouse button drag the entire canvas with right mouse button The zooming at the pivot point works as long as you start the zooming at scale 1. Position the mouse over a grid point and scroll the mouse wheel. The pivot point will remain where you started zooming. Problem : When you zoom in, then move the mouse to another point and

问题 I'm trying to create an application with a zoomable/pannable canvas. Features : zoom in/out with mouse wheel at pivot points drag nodes around on the canvas with left mouse button drag the entire canvas with right mouse button The zooming at the pivot point works as long as you start the zooming at scale 1. Position the mouse over a grid point and scroll the mouse wheel. The pivot point will remain where you started zooming. Problem : When you zoom in, then move the mouse to another point and

问题 How to check mousewheel movement without scrollbar? $(document).mousewheel(function() { clicker.html("a7a"); }); 回答1: I highly recommend you use this jQuery plugin: PLUGIN Without a plugin, try this example: EXAMPLE HTML: <div id='foo' style='height:300px; width:300px; background-color:red'></div> Javascript: $('#foo').bind('mousewheel', function(e) { if(e.originalEvent.wheelDelta / 120 > 0) { alert('up'); } else { alert('down'); } }); There is no scrollbar on the div but the wheel event is

问题 I can't make a ScrollView properly scrolling. It always cut off the content on the bottom, as if it were a normal LinearLayout. My code <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:fillViewport="true" > <LinearLayout android:id="@+id/scroll_layout" android:layout_width="match_parent" android:layout_height="wrap_content" android:isScrollContainer="true" android:orientation="vertical" > Of

问题 I have this code for a RecyclerView. recyclerView = (RecyclerView)rootview.findViewById(R.id.fabric_recyclerView); recyclerView.setLayoutManager(layoutManager); recyclerView.addItemDecoration(new RV_Item_Spacing(5)); FabricAdapter fabricAdapter=new FabricAdapter(ViewAdsCollection.getFabricAdsDetailsAsArray()); recyclerView.setAdapter(fabricAdapter); I need to know when the RecyclerView reaches bottom most position while scrolling. Is it possible ? If yes, how ? 回答1: there is also a simple way

问题 I have a chat system on my site and defaulted the message div position to always display the last message on page load. I accomplished this by using the following line of code: msgDiv = document.getElementById('message_row_large'); msgDiv.scrollTop = msgDiv.scrollHeight; However, this code sets the scroll position to be equal to the div height at all times, which doesn't allow users to scroll up and see other messages. I need to re-enable scroll to its default functionality after the page

问题 I have a chat system on my site and defaulted the message div position to always display the last message on page load. I accomplished this by using the following line of code: msgDiv = document.getElementById('message_row_large'); msgDiv.scrollTop = msgDiv.scrollHeight; However, this code sets the scroll position to be equal to the div height at all times, which doesn't allow users to scroll up and see other messages. I need to re-enable scroll to its default functionality after the page

问题 I have a ListView which is layout below a header bar and layout above a footer bar. Each row of the ListView contains a LinearLayout with a CheckBox and TextView side by side. Now, when I have more rows that can be shown at a time, you can of course scroll down or up. However, once I scroll down or up the first and / or last CheckBox is being checked automatically. My finger is nowhere near where you would select the check box. What could be causing this? Note I used code here: http://www

问题 Okay, I got an div#outer with a width of 200px e.g. In this div is another wider div, which has a width of 1200px. To keep it simple this values are fix, in real this will be calculated. The outer div has "overflow:scroll" so the user can scroll from left to right. On init the inner div scrolls to a specific position. This all works good, but why not in IE9 ? I've made a fiddle, eventually someone has an idea whats going on in IE there. http://jsfiddle.net/3GZYy/1/ var scrollOffset = parseInt

问题 When a user is at the top of a page, the div is shown. When they scroll down the page, the div is hidden until they reach the bottom of the page, whereby the div is shown again. The div would be a fixed navigation menu Below is some code posted by another member, which successfully shows the div at the bottom of the page, but always hides it at the top. Original post can be found here: How to show div when user reach bottom of the page? Thanks! <script> $(document).ready(function() { $(window