visibility

问题 From the Eclipse Java compiler setting: Method does not override package visible method "A package default method is not visible in a different package, and thus cannot be overridden. When this option is enabled, the compiler will signal such scenario either as an error or a warning." How can I trigger this Warning/Error? I'm looking for a code example. 回答1: Foo.java: package foopackage; public class Foo { String getString() { return "foo"; } } Bar.java: package barpackage; import foopackage

问题 This question already has answers here : Why does jQuery or a DOM method such as getElementById not find the element? (8 answers) Closed 3 years ago . I am building this small cookiescript which creates a cookie when clicking on a button and then hides the message. But now I am building the function to hide the message (div#cookie) when the cookie has been seet, but I get this error everytime, but my div DOES exist: Uncaught TypeError: Cannot read property 'style' of null Now these are the

问题 I would like to find out which strategy is the best for links, forms and DOM elements appearance manipulation (show/hide) on top level of multi modular application (admin, default, etc) ?? It should be done through ACL and it's usage I know well, permission are stored in DB. If someone tries to access certain page (module/controller/action) that is not allowed for him, an info page is passed which says that he is not allowed. In that case all elements are visible. I have a few strategies for

问题 I have a TabControl with many TabItems binding to a ViewModel that has properties for each TabItem's Visibility. <sdk:TabControl> <sdk:TabItem Name="Inventory" Header="Inventory" Style="{StaticResource TabItemStyle}" Visibility="{Binding Permissions.Inventory, Converter={StaticResource PermissiveVisibilityConverter}, ConverterParameter='Viewer'}" DataContext="{Binding VM}" /> </sdk:TabControl> All TabItems are defaulted to a Visibility of collapsed. But when the VM changes a TabItem to

问题 I using coda slider in my page. View it here: http://www.ndoherty.com/demos/coda-slider/1.1.1/ Each tab causes the pane to shift the content inside it when it is clicked. I want something ELSE to happen on click. When a tab is clicked, I want an image to appear in the topleft section of the page in a div called "#topleft". For the sake of simplicity, lets just focus on this one div, but I will have other divs activated on click as well. I was thinking of setting the #topleft div to display

问题 Given is a 2D are with the polygons. I need to find out the polygons visible in a perpendicular line of sight from the a given line segment lying within that area. e.g. Further, What can be the optimizations when the polygons have only vertical and horizontal edges. 回答1: I'd suggest the following ... Rotate the problem so your 'line of sight' segment is aligned to the x axis. Find the (axis aligned) bounding rectangle (BR) of each polygon. Sort the polygons using the Y coordinate of the

问题 I have a listview which is build up of two textviews coming from a separate layout file. I use a BaseAdapter to build the list from a JSON file. I would like the first textview (Caption) to be clickable, if clicked that it shows the second textview (Text), and if clicked again that it hides it. When I use an onClick ( android:onClick="ClText" ) I get an error. I think I should use something of an onClickListener , but since I'm new to Android I'm not quite sure how to use it. Can someone help

问题 Having the following class hierarchy: class TheParent{ public function parse(){ $this->validate(); } } class TheChild extends TheParent{ private function validate(){ echo 'Valid!!'; } } $child= new TheChild(); $child->parse(); What is the sequence of steps in which this is going to work? The problem is when I ran that code it gave the following error: Fatal error: Call to private method TheChild::validate() from context 'TheParent' on line 4 Since TheChild inherits from TheParent shouldn't

问题 if( ......) { tabHost.getTabWidget().getChildAt(0).setVisibility(View.GONE); //to hide the first tab in the TabHost } Is there anything wrong with this code ? The application crashes when I add this code inside the onCreate() method.. Any idea ? My LogCat : 05-31 22:03:38.471: E/AndroidRuntime(598): Caused by: java.lang.NullPointerException 05-31 22:03:38.471: E/AndroidRuntime(598): at swayam.dev.mushtouch.MushTouchActivity.setVisibilityControls(MushTouchActivity.j‌​ava:75) 05-31 22:03:38.471

问题 Is it possible to detect if a window for a program outside mine is 1) completely visible, 2) partly hidden, or 3) completely hidden? I want to be able to tell my application not to do anything if a window (based on a retrieved handle) isn't visible. I don't care if the window has focus or not,what the z order is, or anything else, I'm just interested in how much of the window shows. If I need something else to get this, I'm fine, but is it possible? Thanks. 回答1: Raymond Chen wrote an article