visibility

问题 My application requires that users upload a set of required documents (Upload #1, Upload #2, Upload #3). When an upload completes, it returns the requirement identifier (req_id). The page displays a list of the requirements, and currently changes the class from "missing" to "complete" once a particular item is uploaded. However, I'd also like to change the visibility of a "delete" icon from hidden to visible once the upload is complete as well. HTML: <ul> <li class="missing" rel="1"> <span

问题 When a parent node becomes invisible a child becomes invisible too without modifying child visible property. So how can the visibility of a child node be observed without observing all parent nodes and the hierarchy? Is there a proper event fired? 回答1: I don't think there is a direct way to achieve what you want. There is no property to observe and no event is fired when the parent visibility changes. You can take a look at the internal implementation of Node.parentPropertyImpl() , which

问题 Consider the example below. Class a has private const SOMETHING , but class b has protected const SOMETHING . class a { private const SOMETHING = 'This is a!'; public static function outputSomething() { return static::SOMETHING ?? self::SOMETHING; } } class b extends a { protected const SOMETHING = 'This is b!'; } echo (new b())::outputSomething(); Output: This is b! But now if I comment out the definition for SOMETHING in class b, an error is thrown: class a { private const SOMETHING = 'This

问题 I have a file that contains the following: #include <map> class A {}; void doSomething() { std::map<int, A> m; } When compiled into a shared library with g++, the library contains dynamic symbols for all the methods of std::map<int, A> . Since A is private to this file, there is no possibility that std::map will be instantiated in any other shared library with the same parameters, so I'd like to make the template instantiation hidden (for some of the reasons described in this document). I

问题 I've seen on the internet quite a few examples of binding a boolean to the Visibility property of a control in XAML. Most of the good examples use a BooleanToVisibiliy converter. I'd like to just set the Visible property on the control to bind to a System.Windows.Visibility property in the code-behind, but it doesn't seem to want to work. This is my XAML: <Grid x:Name="actions" Visibility="{Binding Path=ActionsVisible, UpdateSourceTrigger=PropertyChanged}" /> This is the code for the property

问题 I make a game like 4Pics1Word. Now I have 14 buttons and I want to set the visibility of the Buttons in a loop. If the answer has 5 letters, the first 5 Buttons should be Visible For example this is my code: int lengthTest = dataArr.get(currentQuestion)[0].length(); // Get Length of the word from the array. for (int nr = 0; nr <= lengthTest; nr++) { // My Loop doesnt work answer[nr].setVisibility(View.VISIBLE); } And that is what I have now, but for 100 Pics it take´s to long to write it

问题 I have a div that I want to show only if a certain value is selected from a drop down menu ( in this case , it is custom-css ) On the fiddle ( http://jsfiddle.net/obmerk99/8xnzh/1/ ) it works ok... jQuery(document).ready(function() { jQuery("#k99-custom-1").change(function () { jQuery("#k99-custom-1 option:selected").each(function () { if( jQuery(this).attr("value") == "custom-css") { jQuery("#customcss").show(); } else { jQuery("#customcss").hide(); } }); }).change(); }); but in the real

问题 I need to hide a button during an onClick action like this: public void onClick(View view) { switch (view.getId()){ case R.id.button1: Button button2 = (Button) findViewById(R.id.button2); button2.setVisibility(View.GONE); //Some methods //... button2.setVisibility(View.VISIBLE); break; } But the visibility changes only after the onClick, what could I do to hide the button during the onClick? Thanks 回答1: of course because you are executing all operation in the same thread you may notice the

问题 private void Button_Click(object sender, RoutedEventArgs e) { int selectedValue = (int)comboSelection.SelectedValue; if (selectedValue == 8) { EightTiles et = new EightTiles(); this.Visibility = Visibility.Collapsed; et.Visibility = Visibility.Visible; } } My target is when the combo box selection is equal to 8 then click the button, current usercontrol get collapsed and next usercontrol(EightTiles) get visible. But my problem is when i click the button it shows a blank page, next user

问题 How can I access the content of hidden field, where the hiddenfiled's visibility set to Visible=false in the server side using C#. I am not in a situation to use CSS's display:none instead of Visible=false . 回答1: If Visible is false , then the control did not go down to the client, so you cannot directly access it from javascript: it simply isn't there. Equally, since it is a HiddenField (i.e. <input type="hidden"...> ), there is no need to set display:none - it will never be visible, even if