for some reason, when I do that (in BeforeSolveInstance):
_doc = OnPingDocument();
var test = new Param_Curve();
_doc.AddObject(test, false);
test.Attributes.Pivot = new PointF(100, 150);
the container lands on the origin of the canvas (top/left).
It does contain though its correct cooordinates as it goes straight to its place, when I add something else onto the canvas, so when the canvas gets somehow refreshed. But why should be a refresh needed? And can I do it programmaticaly?
For ComboBoxes (GH_ValueList) or Scribbles (GH_Scribble) it works as expected, looks like this behavior is specific to the GH_PersistentGeometryParam objects. Am I right? Why is it so?
well it seem like you’re adding the element before setting the pivot.
not sure if I tell some really stupid thing, but I remember having something like this to keep the element in place:
//Our object is always the same size, but it needs to be anchored to the pivot.
protected override void Layout()
{
//Lock this object to the pixel grid.
//I.e., do not allow it to be position in between pixels.
Pivot = GH_Convert.ToPoint(Pivot);
Bounds = new RectangleF(Pivot, new SizeF((float)(ButtonSize * 2.5), ButtonSize));
}
/// <summary>
/// This method returns the button at the given column and row offsets.
/// </summary>
private RectangleF TextBound()
{
int x = Convert.ToInt32(Pivot.X);
int y = Convert.ToInt32(Pivot.Y);
return new RectangleF(new PointF(x + 27, y), new SizeF(55, ButtonSize));
}
private Rectangle Button()
{
int x = Convert.ToInt32(Pivot.X);
int y = Convert.ToInt32(Pivot.Y);
return new Rectangle(x + 4 , y + 4, ButtonSize - 8, ButtonSize - 8);
}
we had made some experience in this post, it MIGHT be helpful:
Hello Ben, thank you for the answer.
yes I did try to set the pivot first and then add the element to the doc, but I then get a NullReferenceException: the Attributes property of the IGH_Param is first initialised, when the IGH_Param is added to the document.
I did not find something in relation to that topic in your link by the way… Not sure what you meant there.
So I still don t know why the Param_Curve (or any container type) lands at (0;0) allthough its pivot shows somewhere else but saw that if you set its source, its position on the canvas gets somehow updated (?!).
So I worked around my problem adding the container a dummy source which I then delete. Not elegant but it works…
