private static VisualElement PerformPick(VisualElement root, Vector2 point, List <VisualElement> picked = null)
{
// Skip picking for elements with display: none
if (root.resolvedStyle.display == DisplayStyle.None)
{
return(null);
}
if (root.pickingMode == PickingMode.Ignore && root.hierarchy.childCount == 0)
{
return(null);
}
Vector2 localPoint = root.WorldToLocal(point);
if (!root.boundingBox.Contains(localPoint))
{
return(null);
}
bool containsPoint = root.ContainsPoint(localPoint);
// we only skip children in the case we visually clip them
if (!containsPoint && root.ShouldClip())
{
return(null);
}
VisualElement returnedChild = null;
// Depth first in reverse order, do children
for (int i = root.hierarchy.childCount - 1; i >= 0; i--)
{
var child = root.hierarchy[i];
var result = PerformPick(child, point, picked);
if (returnedChild == null && result != null && result.visible)
{
returnedChild = result;
}
}
if (picked != null && root.enabledInHierarchy && root.visible && root.pickingMode == PickingMode.Position && containsPoint)
{
picked.Add(root);
}
if (returnedChild != null)
{
return(returnedChild);
}
switch (root.pickingMode)
{
case PickingMode.Position:
{
if (containsPoint && root.enabledInHierarchy && root.visible)
{
return(root);
}
}
break;
case PickingMode.Ignore:
break;
}
return(null);
}
private static VisualElement PerformPick(VisualElement root, Vector2 point, List <VisualElement> picked = null)
{
// Skip picking for elements with display: none
if (root.resolvedStyle.display == DisplayStyle.None)
{
return(null);
}
if (root.pickingMode == PickingMode.Ignore && root.hierarchy.childCount == 0)
{
return(null);
}
if (!root.worldBoundingBox.Contains(point))
{
return(null);
}
// Problem here: everytime we pick, we need to do that expensive transformation.
// The default Contains() compares with rect, while we could cache the rect in world space (transform 2 points, 4 if there is rotation) and be done
// here we have to transform 1 point at every call.
// Now since this is a virtual, we can't just start to call it with global pos... we could break client code.
// EdgeControl and port connectors in GraphView overload this.
Vector2 localPoint = root.WorldToLocal(point);
bool containsPoint = root.ContainsPoint(localPoint);
// we only skip children in the case we visually clip them
if (!containsPoint && root.ShouldClip())
{
return(null);
}
VisualElement returnedChild = null;
// Depth first in reverse order, do children
var cCount = root.hierarchy.childCount;
for (int i = cCount - 1; i >= 0; i--)
{
var child = root.hierarchy[i];
var result = PerformPick(child, point, picked);
if (returnedChild == null && result != null && result.visible)
{
returnedChild = result;
}
}
if (picked != null && root.enabledInHierarchy && root.visible && root.pickingMode == PickingMode.Position && containsPoint)
{
picked.Add(root);
}
if (returnedChild != null)
{
return(returnedChild);
}
switch (root.pickingMode)
{
case PickingMode.Position:
{
if (containsPoint && root.enabledInHierarchy && root.visible)
{
return(root);
}
}
break;
case PickingMode.Ignore:
break;
}
return(null);
}
private static VisualElement PerformPick(VisualElement root, Vector2 point, List <VisualElement> picked = null)
{
bool flag = root.resolvedStyle.display == DisplayStyle.None;
VisualElement result;
if (flag)
{
result = null;
}
else
{
bool flag2 = root.pickingMode == PickingMode.Ignore && root.hierarchy.childCount == 0;
if (flag2)
{
result = null;
}
else
{
bool flag3 = !root.worldBoundingBox.Contains(point);
if (flag3)
{
result = null;
}
else
{
Vector2 localPoint = root.WorldToLocal(point);
bool flag4 = root.ContainsPoint(localPoint);
bool flag5 = !flag4 && root.ShouldClip();
if (flag5)
{
result = null;
}
else
{
VisualElement visualElement = null;
int childCount = root.hierarchy.childCount;
for (int i = childCount - 1; i >= 0; i--)
{
VisualElement root2 = root.hierarchy[i];
VisualElement visualElement2 = Panel.PerformPick(root2, point, picked);
bool flag6 = visualElement == null && visualElement2 != null && visualElement2.visible;
if (flag6)
{
bool flag7 = picked == null;
if (flag7)
{
result = visualElement2;
return(result);
}
visualElement = visualElement2;
}
}
bool flag8 = (root.enabledInHierarchy && root.visible && root.pickingMode == PickingMode.Position) & flag4;
if (flag8)
{
if (picked != null)
{
picked.Add(root);
}
bool flag9 = visualElement == null;
if (flag9)
{
visualElement = root;
}
}
result = visualElement;
}
}
}
}
return(result);
}