visibility

问题 I've upgraded a WPF project to .NET 4.5.2. In a xaml file, I have the following line. <UserControl x:Class="Casa.Project.Client.Views.Projects.ProjectSearch" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:controls="clr-namespace:Casa.Project.Core.Wpf.Controls;assembly=Casa.Project

问题 I am curious as to why this is allowed to work, whereby you can call and successfully execute a private method on an object from outside of the object scope providing you are making the call from a class of the same type. The private method call from a public scope to me seems not to satisfy the criteria of a private method, so why is this allowed in both PHP and Java? <?php class A { public function publicMethod () { $obj = new static; $obj->privateMethod (); } private function privateMethod

问题 Take a look at this screenshoot first: That white box is ON the orange background, I want it to be under it exactly as pointed with the arrow. The rest should be visible of course: it should just hide this from being on the orange background. Here is the orange background style and the white box itself: Orange background: body { margin: 0; padding: 0; background: url("../img/back.png") repeat-x top #fff; text-align: left; color: #8a5225; } White box: #box { background: url("../img/box.png")

问题 <style> #count2{ visibility:hidden; } #count1:hover{ background:#123456; //how do I change the visibility property of #count2 here? } </style> <div id="count1">My visible element</div> <div id="count2">My flickering element</div> My question is clear and might be little weird though. How do I change the visibility property of #count2 to true when somebody hovers on #count1, using only css. 回答1: Since you're modifying two different elements on hovering one of them, you can use a sibling

问题 I need to show message "Please wait Processing" on click of Submit button using a hidden DOM element which contains the message and make it visible, but the message is not showing. My html for the form and my validate function are given below. <form name="siteSearchForm" method=post action="<%=request.getContextPath()%>/servlet/visibilityController" onsubmit="javascript:return validate();on_load()"> <td align="center" width="10%"><input type=submit name="siteSearchSubmit" value="SUBMIT" > 

问题 Its generic question. If I add some UI objects such as JButton etc and check the isVisible property, it would return true. However, does it guarantee that the object is actually rendered and visible correctly on the display? If not, is there some better way to check the same? 回答1: No isVisible() is only a hint for this component itself. If it is really visible for the user depends on the parent hierarchy of the component. This can be verified best by isShowing() inherited by Component, which

问题 I've got a Validator class and a UserValidator class which extends from it. My Validator has a public method setRule(...) with public visibility. When I extend from it I want to change the visibility of the setRule(...) parent method to private/protected within the child so that it's only visible for the child and no outsiders can call this method from the child. Is that possible? If so, how could I achieve it? 回答1: From an architectural point of view this is not recommended. As already

问题 I've found more than one reference to a VisibleChanged event on MSDN pages that state it is for the Windows Phone 8 platform. However, when I try to access it via Intellisense for either the top level user control I'm building (using the "this" keyword), or for the LayoutRoot grid, I don't see it. I did a full search via the Object Browser and I don't see anything there either. Where is it? I need to perform certain task only when the user control is visible, and I need them to stop when it

问题 I am using metaio sdk. I am trying to simply toggle the visibility of two imageviews when pressing a button but it is not working. My layout: <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/ma_layout" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#00000000" > ----- <ImageView android:id="@+id/zoomIcon" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop=

问题 If you change the visibility of an element visibility: hidden , will a click event still fire if the user clicks it? I want to "hide" an element (i.e. <span> ) and disable the click event from firing, but retain is position in the normal flow of the document. So display: none; won't work since it removes the document from the normal flow, but was wondering what are my other options via CSS without actually handling the click event and using preventDefault()? 回答1: No it won't fire when