What is the Method to Add a Context Drop Down Menu

so can anyone tell me the method or property to expose the ability to access/launch a user from form right clicking a context option in a component.

Basically, consider the color swatch or the path component. Right clicking the color swatch launches teh interactive color 3d box for selecting color.

Is there a method or property in the grasshopper SDK for this?

Basically I want to be able to launch a form when the user right clicks such a context]]thanks

Replies to This Discussion

Permalink Reply by Andrew Heumann on February 2, 2016 at 3:42pm

make sure the variables in question are get/set by overridden versions of the Read and Write methods on the component.

Permalink Reply by Qi WU on February 2, 2016 at 6:04pm

Public Class DropDownList
Inherits Grasshopper.Kernel.GH_Component

'Global Variables
Private ListStr As New List(Of String)
Private SelectedItem As String = ""

Public Sub New()
MyBase.New("Dropdown List", "Dropdown", "Right click to select item", "Extra", "Other")
End Sub

Public Overrides ReadOnly Property ComponentGuid As Guid
Get
Return New Guid("xxx")
End Get
End Property

Protected Overrides Sub RegisterInputParams(pManager As GH_InputParamManager)
pManager.AddTextParameter("LStr", "LS", "List of String", GH_ParamAccess.list)
End Sub

Protected Overrides Sub RegisterOutputParams(pManager As GH_OutputParamManager)
pManager.AddTextParameter("Str", "S", "The Selected String", GH_ParamAccess.item)
End Sub

Protected Overrides Sub SolveInstance(DA As IGH_DataAccess)
ListStr.Clear()
If (Not DA.GetDataList(0, ListStr)) Then Return
'If the retrieved data is Nothing, we need to abort.
'We're also going to abort on a zero-length String.
If (ListStr Is Nothing) Then Return
If (ListStr.Count = 0) Then Return

DA.SetData(0, SelectedItem)

End Sub

Public Overrides Function AppendMenuItems(ByVal menu As ToolStripDropDown) As Boolean
menu.Items.Clear()
For i As Integer = 0 To ListStr.Count - 1
Dim str As String = ListStr(i)
Menu_AppendItem(menu, str, AddressOf Menu_MyCustomItemClicked)
Next
'Return True, otherwise the menu won't be shown.
Return True
End Function

Private Sub Menu_MyCustomItemClicked(sender As Object, e As EventArgs)
SelectedItem = sender.ToString
ExpireSolution(True)
End Sub

Public Overrides Function Write(writer As GH_IWriter) As Boolean
writer.SetString("Str", SelectedItem)
Return MyBase.Write(writer)
End Function
End Class

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I am not sure why I need a read method. I have added the Write method but it's not working. Am I getting this wrong?

Thanks!

Permalink Reply by Charles Portelli on February 3, 2016 at 10:34am