- 1 year ago
UWP IScrollSnapPointsInfo
IScrollSnapPointsInfo
is an interface in the Universal Windows Platform (UWP) that provides information about snap points for scrolling. Snap points allow you to create a smooth scrolling experience where the content aligns to specific positions while scrolling.
Here's a brief overview of the IScrollSnapPointsInfo
interface and how it is used in UWP:
Interface Definition:
TheIScrollSnapPointsInfo
interface is part of the Windows.UI.Xaml.Controls.Primitives namespace. It defines properties and methods that provide information about the snap points for a particular scroll axis (horizontal or vertical).Properties:
AreHorizontalSnapPointsRegular
: Gets a value indicating whether the horizontal snap points are evenly spaced.AreVerticalSnapPointsRegular
: Gets a value indicating whether the vertical snap points are evenly spaced.
- Methods:
GetIrregularSnapPoints
: Gets the irregular snap points for a specified scroll axis (horizontal or vertical).
- Usage:
To use theIScrollSnapPointsInfo
interface, you typically implement it in a custom control that requires snap points for scrolling. You need to provide the implementation for the properties and methods of the interface.
Here's an example of how to use IScrollSnapPointsInfo
in a custom control:
csharpusing System.Collections.Generic;
using Windows.Foundation;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
public class CustomScrollViewer : ScrollViewer, IScrollSnapPointsInfo
{
// Implement the IScrollSnapPointsInfo properties
public bool AreHorizontalSnapPointsRegular => false;
public bool AreVerticalSnapPointsRegular => false;
// Implement the IScrollSnapPointsInfo method
public IReadOnlyList<float> GetIrregularSnapPoints(Orientation orientation, SnapPointsAlignment alignment)
{
// Provide the irregular snap points for the specified orientation and alignment
List<float> snapPoints = new List<float>();
// Add your snap points to the list
// For example, you could add snap points based on the size of your content or other criteria
return snapPoints.AsReadOnly();
}
}
In this example, the CustomScrollViewer
class implements the IScrollSnapPointsInfo
interface. It provides custom snap points for both horizontal and vertical scroll axes by implementing the GetIrregularSnapPoints
method.
By using the IScrollSnapPointsInfo
interface, you can customize the snap points behavior for your scrolling controls in UWP.