The method Prompt_Singular Or Prompt_Plural have an default behavior that hide the Grasshopper Dialog when I click button Set One *** or Set Multuply ***. But how Can I Prevent the default behavior when I click the button?
On a parameter class you wrote? For a type of goo you wrote?
@DavidRutten， Yes. I am writing an Parameter that can store or Persisits the info of layer in Rhino. I want to do When I Click the Set One *** Menuitem and the Grasshopper Froms is still show
You have to override the Prompt_Singular() and Prompt_Plural() methods on your parameter class. In there you can do whatever you like.
But It Seem that the Prompt_Singular() and Prompt_Plural() methods of parameter class has default behavior can not be override .
PS: The default behavior is when you click the MenuItem Set One *** Or Set Multi *** the grasshopper dialog will be hide auto.
Well, most parameters override it, so you’re going to have to post some code which doesn’t work.
Hi @DavidRutten the Code is attach below
1、 GH_Layer is an Parameter;
2、 Hu_Layer is an type that wrapper Rhino Layer
Thanks
GH_Layer.cs (4.6 KB) Hu_Layer.cs (6.0 KB)
The following works for me. It shows the window defined in Prompt_Singular() when that menu item is selected. I ran through the code making small changes, just to get a feel for it all.
using System;
using System.Collections.Generic;
using System.Windows.Forms;
using Rhino.DocObjects;
using Grasshopper.Kernel;
using Grasshopper.Kernel.Types;
using GH_IO.Serialization;
namespace CSCECDEC.Plugin.Types
{
public class Hu_Layer : GH_Goo<Layer>
{
public Hu_Layer()
{
Value = null;
}
public Hu_Layer(string name)
{
var doc = Rhino.RhinoDoc.ActiveDoc;
if (doc != null)
Value = doc.Layers.FindName(name);
// doc.Layers.FindByFullPath has been deprecated. However I don't know whether FindName does the same now.
}
public Hu_Layer(int index)
{
var doc = Rhino.RhinoDoc.ActiveDoc;
if (doc != null)
Value = doc.Layers.FindIndex(index);
}
public Hu_Layer(Guid id)
{
var doc = Rhino.RhinoDoc.ActiveDoc;
if (doc != null)
Value = doc.Layers.FindId(id);
}
public Hu_Layer(Layer Layer)
{
Value = Layer;
}
public override IGH_Goo Duplicate()
{
return new Hu_Layer(Value);
}
public override bool Write(GH_IWriter writer)
{
if (Value != null)
writer.SetInt32("LayerIndex", Value.Index);
return base.Write(writer);
}
public override bool Read(GH_IReader reader)
{
if (reader.ItemExists("LayerIndex"))
{
var doc = Rhino.RhinoDoc.ActiveDoc;
if (doc != null)
Value = doc.Layers.FindIndex(reader.GetInt32("LayerIndex"));
}
else
Value = null;
return base.Read(reader);
}
public override bool IsValid
{
get { return Value != null; }
}
public override string TypeName
{
get { return "Layer"; }
}
public override string TypeDescription
{
get { return "A Rhino Layer"; }
}
public override string ToString()
{
if (Value is null)
return "Null layer";
return $"{Value.Index} - {Value.FullPath}";
}
public override bool CastFrom(object source)
{
if (source is null)
return false;
var doc = Rhino.RhinoDoc.ActiveDoc;
if (GH_Convert.ToInt32(source, out int integer, GH_Conversion.Both))
{
Value = doc?.Layers.FindIndex(integer);
return Value != null;
}
if (GH_Convert.ToGUID(source, out Guid id, GH_Conversion.Both))
{
Value = doc?.Layers.FindId(id);
return Value != null;
}
// Probably best to not use Secondary or Both for string conversions,
// as *everything* can be converted to a string.
if (GH_Convert.ToString(source, out string name, GH_Conversion.Primary))
{
Value = doc?.Layers.FindName(name);
return Value != null;
}
return false;
}
public override bool CastTo<Q>(ref Q target)
{
if (Value is null)
return false;
if (typeof(Q).IsAssignableFrom(typeof(int)))
{
target = (Q)(object)Value.Index;
return true;
}
if (typeof(Q).IsAssignableFrom(typeof(GH_Integer)))
{
target = (Q)(object)new GH_Integer(Value.Index);
return true;
}
if (typeof(Q).IsAssignableFrom(typeof(Guid)))
{
target = (Q)(object)Value.Id;
return true;
}
if (typeof(Q).IsAssignableFrom(typeof(GH_Guid)))
{
target = (Q)(object)new GH_Guid(Value.Id);
return true;
}
if (typeof(Q).IsAssignableFrom(typeof(string)))
{
target = (Q)(object)Value.FullPath;
return true;
}
if (typeof(Q).IsAssignableFrom(typeof(GH_String)))
{
target = (Q)(object)new GH_String(Value.FullPath);
return true;
}
if (typeof(Q).IsAssignableFrom(typeof(Layer)))
{
// This is different from before, a new layer was
// extracted from the active doc based on the index of the
// current value.
target = (Q)(object)Value;
return true;
}
return false;
}
}
public class GH_Layer : GH_PersistentParam<Hu_Layer>
{
public GH_Layer()
: base(new GH_InstanceDescription("Layer", "Lay", "A parameter for referencing a Rhino layer", "Params"))
{ }
public override Guid ComponentGuid
{
get { return new Guid("878c2318-5294-41d9-98f9-2ae90c485afc"); }
}
public override GH_Exposure Exposure
{
get { return GH_Exposure.primary; }
}
protected override Hu_Layer InstantiateT()
{
return new Hu_Layer();
}
protected override GH_GetterResult Prompt_Singular(ref Hu_Layer value)
{
var doc = Rhino.RhinoDoc.ActiveDoc;
if (doc is null) return GH_GetterResult.cancel;
var form = new Form
{
Text = "Pick a layer",
Width = Grasshopper.Global_Proc.UiAdjust(200),
Height = Grasshopper.Global_Proc.UiAdjust(300),
ShowInTaskbar = false,
MaximizeBox = false,
MinimizeBox = false,
StartPosition = FormStartPosition.CenterParent
};
var list = new ListBox
{
MultiColumn = false,
Dock = DockStyle.Fill,
SelectionMode = SelectionMode.One
};
foreach (var layer in doc.Layers)
list.Items.Add(layer);
var button = new Button
{
Text = "OK",
Height = Grasshopper.Global_Proc.UiAdjust(32),
Dock = DockStyle.Bottom,
DialogResult = DialogResult.OK
};
form.Controls.Add(list);
form.Controls.Add(button);
if (form.ShowDialog() == DialogResult.OK)
{
var layer = list.SelectedItem as Layer;
value = new Hu_Layer(layer);
return GH_GetterResult.success;
}
else
return GH_GetterResult.cancel;
}
protected override GH_GetterResult Prompt_Plural(ref List<Hu_Layer> values)
{
// Same as Prompt_Singular, just allow for multiple selection.
return GH_GetterResult.cancel;
}
}
}
1 Like
Hi David,I’m So Sorry, Maybe I am not exaplain clearly.
I mean when I click the menu item the Grasshopper Main Windows is hide. How Can I override the default behavior?