/// <summary>
/// Set the <see cref="IDropInfo.Effects"/> when the payload is an <see cref="ElementDefinition"/>
/// </summary>
/// <param name="dropinfo">The <see cref="IDropInfo"/></param>
/// <param name="elementDefinition">The <see cref="ElementDefinition"/> in the payload</param>
private void DragOver(IDropInfo dropinfo, ElementDefinition elementDefinition)
{
if (!this.PermissionService.CanWrite(ClassKind.ElementUsage, this.Thing.Container))
{
dropinfo.Effects = DragDropEffects.None;
return;
}
if (elementDefinition.TopContainer == this.Thing.TopContainer)
{
// prevent circular model
dropinfo.Effects = elementDefinition.HasUsageOf(this.Thing)
? DragDropEffects.None
: DragDropEffects.Copy;
return;
}
dropinfo.Effects = DragDropEffects.None;
}
public void VerifyThatHasUsageOfWorks()
{
var def1 = new ElementDefinition();
var def11 = new ElementDefinition();
var def12 = new ElementDefinition();
var def111 = new ElementDefinition();
var def1111 = new ElementDefinition();
var def121 = new ElementDefinition();
def1.ContainedElement.Add(new ElementUsage {
ElementDefinition = def11
});
def1.ContainedElement.Add(new ElementUsage {
ElementDefinition = def12
});
def11.ContainedElement.Add(new ElementUsage {
ElementDefinition = def111
});
def111.ContainedElement.Add(new ElementUsage {
ElementDefinition = def1111
});
def12.ContainedElement.Add(new ElementUsage {
ElementDefinition = def121
});
Assert.IsTrue(def1.HasUsageOf(def1));
Assert.IsTrue(def1.HasUsageOf(def11));
Assert.IsTrue(def1.HasUsageOf(def111));
Assert.IsTrue(def1.HasUsageOf(def1111));
Assert.IsTrue(def1.HasUsageOf(def12));
Assert.IsTrue(def1.HasUsageOf(def121));
Assert.IsTrue(def11.HasUsageOf(def11));
Assert.IsTrue(def11.HasUsageOf(def111));
Assert.IsTrue(def11.HasUsageOf(def1111));
Assert.IsFalse(def11.HasUsageOf(def1));
Assert.IsFalse(def11.HasUsageOf(def12));
Assert.IsFalse(def11.HasUsageOf(def121));
}
public void VerifyThatHasUsageOfThrowsException()
{
var def1 = new ElementDefinition();
Assert.Throws <ArgumentNullException>(() => def1.HasUsageOf(null));
}
