private static List <Control> findPropagationPathUsingTest(IControlParent root, PropagationTest propagationTest)
{
var path = new List <Control>();
tryFindPropagationPathForAnyChild(root, propagationTest, path);
return(path);
}
public InstructorHomeControl(IControlParent controlParent, int id)
{
InitializeComponent();
instructorStore = StoreFactory.BuildInstructorStore();
instructor = instructorStore.GetInstructorById(id);
ShowInstructorBasicInfo();
}
public LoginControl(IControlParent controlParent)
{
InitializeComponent();
// keep a reference to the parent form, which is how we request a new control be shown
this.controlParent = controlParent;
// create the login manager, which handles all the login requests
this.loginManager = new LoginManager();
}
public NavigationController(
IControlParent root,
DependencyResolver dependencyResolver,
IDictionary <Type, object> modelFactories,
IDictionary <Type, object> viewFactories)
{
this.root = root;
this.dependencyResolver = dependencyResolver;
this.modelFactories = modelFactories;
this.viewFactories = viewFactories;
}
// notice that the parent (as an interface called icontrolparent) is passed into the constructor.
// we'll use this later so that we can navigate to other controls.
public StudentHomeControl(IControlParent controlParent, int id)
{
InitializeComponent();
// create the store (the place where we get student data from)
studentStore = StoreFactory.BuildStudentStore();
// load data for the student whose id was passed into the constructor--
// we only want to do this once when the screen loads so that we don't
// have to call the database many times
student = studentStore.GetStudentByUserId(id);
// show the student's basic info at the top of the screen--
// this really just takes the student info we've already loaded and updates the screen;
// it's often easier to wrap simple code like this into methods because it makes the
// code much easier to read--your intent is clear from how you named the method
ShowStudentBasicInfo();
// load the student's current course enrollments
GetCurrentCourseEnrollments();
}
// Never returns the root as part of the path.
public static EventPropagationPath FindPropagationPath(IControlParent root, Control leaf)
{
var parent = leaf.Parent;
var path = new List <Control> {
leaf
};
while (parent != root)
{
if (!(parent is Control parentAsControl))
{
// Tried creating path between unconnected controls.
return(EventPropagationPath.Empty);
}
path.Add(parentAsControl);
parent = parentAsControl.Parent;
}
path.Reverse();
return(new EventPropagationPath(path.AsReadOnly()));
}
public void SetParent(IControlParent control)
{
Parent = control;
}
public static bool IsDescendantOf(this Control control, IControlParent parent)
{
return(control.Parent == parent ||
(control.Parent is Control parentControl && parentControl.IsDescendantOf(parent)));
}
public static T?FirstChildOfType <T>(this IControlParent parent) where T : class
{
return(parent.Children.OfType <T>().FirstOrDefault());
}
private static bool tryFindPropagationPathForAnyChild(
IControlParent parent, PropagationTest propagationTest, List <Control> path) =>
parent.Children.Reverse()
.Any(child => findPropagationPathUsingTest(child, propagationTest, path));
// Never returns the root as part of the path. public static EventPropagationPath FindPropagationPath(IControlParent root, PropagationTest propagationTest) => new EventPropagationPath(findPropagationPathUsingTest(root, propagationTest).AsReadOnly());
public void SetParent(IControlParent control)
{
_content.SetParent(control);
}