how to bind width of child element to width of parent element in silverlight
This will actually help you I guess Width=”{Binding ActualWidth, ElementName=parentElementName}” This binds the width to the parent element or the element name provided
binding
How to assign an optional Binding parameter in SwiftUI?
@Binding var searchTxt: String? init(searchTxt: Binding<String?>?) { self._searchTxt = searchTxt ?? Binding.constant(nil) } Update: I prefer this one. TextField(“”, text: $text ?? “default value”) https://stackoverflow.com/a/61002589/4728060 func ??<T>(lhs: Binding<Optional<T>>, rhs: T) -> Binding<T> { Binding( get: { lhs.wrappedValue ?? rhs }, set: { lhs.wrappedValue = $0 } ) }
How do language bindings work?
For the most part most languages out there are either written in C (Perl, Python, Ruby, Tcl …) or is compatible with C (C++, C#, Objective-C). Therefore, for most languages it is easy to use a C library by writing some wrapper functions to convert data structures in that language into native C data structures. … Read more
Why RelayCommand
Commands are used to separate the semantics and the object that invokes a command from the logic that executes the command i.e. it separates UI component from the logic that needs to be executed on command invocation. So, that you can test business logic separately using test cases and also your UI code is loosely … Read more
Binding only part of the margin property of WPF control
Have you tried using a converter like this? in VB.Net Public Class MarginConverter Implements IValueConverter Public Function Convert(ByVal value As Object, ByVal targetType As System.Type, ByVal parameter As Object, ByVal culture As System.Globalization.CultureInfo) As Object Implements System.Windows.Data.IValueConverter.Convert Return New Thickness(0, CDbl(value), 0, 0) End Function Public Function ConvertBack(ByVal value As Object, ByVal targetType As System.Type, … Read more
A ‘Binding’ can only be set on a DependencyProperty of a DependencyObject
As a side note, it is also worth noting that you will get these binding errors if you copy and paste between objects and forget to change the second typeof(Object) statement. I couldn’t figure out for a good hour why I was getting this error as everything appeared to be defined and correct. I’d moved … Read more
What is [cmdletbinding()] and how does it work?
Generally speaking, CmdletBinding is what makes a function into an Advanced function. Putting it at the top of a script makes the script an “advanced” script. Functions and scripts are much the same, where the script file name is equivalent to the function name and the script content is equivalent to the scriptblock section of … Read more
python bindings, how does it work?
There are several ways to call code written in C from Python. First, there is the ctypes module in the standard library. It allows you to load a dynamic-link library (DLL on Windows, shared libraries .so on Linux) and call functions from these libraries, directly from Python. Such libraries are usually written in C. Second, … Read more
What are the defaults for Binding.Mode=Default for WPF controls?
Similar to UpdateSourceTrigger, the default value for the Mode property varies for each property. User-editable properties such as TextBox.Text, ComboBox.Text, MenuItem.IsChecked, etc, have TwoWay as their default Mode value. To figure out if the default is TwoWay, look at the Dependency Property Information section of the property. If it says BindsTwoWayByDefault is set to true, … Read more
bind/unbind service example (android)
You can try using this code: protected ServiceConnection mServerConn = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder binder) { Log.d(LOG_TAG, “onServiceConnected”); } @Override public void onServiceDisconnected(ComponentName name) { Log.d(LOG_TAG, “onServiceDisconnected”); } } public void start() { // mContext is defined upper in code, I think it is not necessary to explain what is … Read more