visibility – Page 4 – Tarik Billa

What is the CMake equivalent to “gcc -fvisibility=hidden” when controlling the exported symbol of a shared library?

March 13, 2023 by Tarik

Instead of setting compiler flags directly, you should be using a current CMake version and the <LANG>_VISIBILITY_PRESET properties instead. This way you can avoid compiler specifics in your CMakeLists and improve cross platform applicability (avoiding errors such as supporting GCC and not Clang). I.e., if you are using C++ you would either call set(CMAKE_CXX_VISIBILITY_PRESET hidden) … Read more

In WPF, how can I determine whether a control is visible to the user?

March 7, 2023 by Tarik

You can use this little helper function I just wrote that will check if an element is visible for the user, in a given container. The function returns true if the element is partly visible. If you want to check if it’s fully visible, replace the last line by rect.Contains(bounds). private bool IsUserVisible(FrameworkElement element, FrameworkElement … Read more

Is there any way to set a private/protected static property using reflection classes?

March 4, 2023 by Tarik

For accessing private/protected properties of a class we may need to set the accessibility of that class first, using reflection. Try the following code: $obj = new ClassName(); $refObject = new ReflectionObject( $obj ); $refProperty = $refObject->getProperty( ‘property’ ); $refProperty->setAccessible( true ); $refProperty->setValue(null, ‘new value’);

Why doesn’t setVisibility work after a view is animated?

March 4, 2023 by Tarik

For me calling clearAnimation of the View fixed the problem. In my case I wanted to set the View back to its original position after doing a translation with fillAfter set to true.

UIView hide children views when out of bounds

February 25, 2023 by Tarik

Set the parent view’s clipsToBounds property to YES. Programmatically: view.clipsToBounds=YES; Through interface builder: Click the view->Attributes Inspector->Check Clip to Bounds

Why does jQuery show/hide use display:none instead of visibility:hidden?

February 24, 2023 by Tarik

Because in display:none, the element, for all purposes, ceases to exist — it doesn’t occupy any space. However, in visibility:hidden, it’s as if you had just added opacity:0 to the element — it occupies the same amount of space but just acts invisible. The jQuery creators probably thought the former would be a better fit … Read more

jquery fade element does not show elements styled ‘visibility: hidden’

February 15, 2023 by Tarik

Add a few calls to the chain like this: $(‘.littleme’).css(‘visibility’,’visible’).hide().fadeIn(‘slow’); This will change it to display:none for 1 frame before fading in, occupying the area again.

Why is there no sub-class visibility modifier in Java?

February 7, 2023 by Tarik

I suppose they want to avoid the added complexity by having a non-linear access hierarchy. You should have control over your package, so simply don’t call these protected methods there. (By the way, protected is not quite the same as sub-class and package, as non-static protected methods (if not in the same package) can’t be … Read more

iOS equivalent for Android View.GONE visibility mode

February 7, 2023 by Tarik

Adding a constraint(NSLayoutAttributeHeight) that sets height of the view to 0 worked for me: [self.view addConstraint:[NSLayoutConstraint constraintWithItem:self.captchaView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:0]];

CSS: Is a hidden object clickable?

February 5, 2023 by Tarik

With display: none it is still part of the DOM. It just isn’t rendered in the viewport. As for clicks on elements with visibility: hidden, the events are not fired. jsFiddle. $(‘div’).click(function() { alert(‘Hello’) }); div { width: 100%; height: 100%; visibility: hidden; } <div>abc</div>