constraints

So I'm new to the constraints. I've a nib file which contains multiple Views as siblings. The ViewController's view contains a tableView and I've another view which is going to be added to the tableHeaderView (let's call it self.tableHeaderView). The problem i'm facing is that I want to resize the self.tableHeaderView based on certain conditions. I've added constraints to all of my UI elements and I can't, for whatever reason, add a height constraint to the self.tableHeaderView via the nib. I tried changing the frame of the self.tableHeaderView programmatically but that has no effect when i

I have been trying to figure out how to auto-size TreeView columns to fit their content for a while now. This has been asked before, but the response was minimal and not acceptable. [ javafx column in tableview auto fit size Curiously, the behavior I'm looking for is exactly what happens when you double-click a column resize line in TableView. However, I have been unable to figure out how this occurs when looking through the JavaFX source code. Does anyone know how/where the double-click behavior on a column resize line is handled in JavaFX TableView/TableColumn/TableColumnHeader? If possible,

Can someone provide a simple example of channelling constraints? Channelling constraints are used to combine viewpoints of a constraint problem. Handbook of Constraint Programming gives a good explanation of how it works and why it can be useful: The search variables can be the variables of one of the viewpoints, say X1 (this is discussed further below). As search proceeds, propagating the constraints C1 removes values from the domains of the variables in X1. The channelling constraints may then allow values to be removed from the domains of the variables in X2. Propagating these value

This question already has an answer here: Is there a constraint that restricts my generic method to numeric types? 20 answers Is it possible to enumerate which types that is "available" in a generic constraint? T MyMethod<t>() where T : int, double, string Why I want to do this is that I have a small evaluator engine and would like to write code like this: bool expression.Evaluate<bool>(); or int expression.Evaluate<int>(); but i want to prohibit MyCustomClass expression.Evalaute<MyCustomClass>(); It is not possible to restrict a generic argument to specific types. As a workaround, you could

What is happening now with constraints in SwiftUI ? Do View types adapt automatically for bigger devices etc. or what should we have to do instead? RIP, Constraints! SwiftUI doesn't use layout constraints. UIKit is still around, it's not deprecated and fully functional, so if you continue to use the classic approach, you can use as many constraints as you wish. However, if you choose to go with SwiftUI → rest in peace, constraints! The core concept to align views with each other is using stacks: HStack VStack If you want to overlay views (i.e. put one view on top of another), you can use a

I want to restrict the possible types N can take-on using a constraint. I wish to restrict N to be either a int or a decimal. public static Chart PopulateInto<T, N>(List<T> yAxis, List<N> xAxis) where N : int, decimal { // Do stuff here } Any help appreciated... Unfortunately, it is not possible to specify generic type constraints that only allow specific value types. More to the point, it wouldn't make much sense even if it was allowed. You're allowed to specify a class as a generic constraint but this is because you can inherit from classes, the constraint thus sets the minimum threshold of

Can you guess what is the reason to not allow sealed classes for type-constraints in generics? I only have one explanation is to give opportunity to use naked constraints. If the class is sealed it cannot be inherited. If it cannot be inherited it'd be the only type valid for the generic type argument [assuming if allowed to be a type argument]. If it is the only generic type argument then there's no point in making it generic! You can simply code against the type in non-generic class. Here's some code for this. public class A { public A() { } } public sealed class B : A { public B() { } }