File size: 5,977 Bytes
b1b3bae | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | Imports System.Windows.Forms
Imports System.Windows.Forms.Design
Imports System.ComponentModel
Imports System.Drawing
Imports System.Drawing.Design
Imports System.Globalization
Imports System.Reflection
Namespace PropertyGridEx
Public Class UIListboxEditor
Inherits UITypeEditor
Private bIsDropDownResizable As Boolean = False
Private WithEvents oList As New ListBox
Private oSelectedValue As Object = Nothing
Private oEditorService As IWindowsFormsEditorService
Public Overloads Overrides Function GetEditStyle(ByVal context As _
ITypeDescriptorContext) As UITypeEditorEditStyle
If Not context Is Nothing AndAlso Not context.Instance Is Nothing Then
Dim attribute As UIListboxIsDropDownResizable = context.PropertyDescriptor.Attributes(GetType(UIListboxIsDropDownResizable))
If attribute IsNot Nothing Then
bIsDropDownResizable = True
End If
Return UITypeEditorEditStyle.DropDown
End If
Return UITypeEditorEditStyle.None
End Function
Public Overrides ReadOnly Property IsDropDownResizable() As Boolean
Get
Return bIsDropDownResizable
End Get
End Property
<RefreshProperties(RefreshProperties.All)> _
Public Overrides Function EditValue(ByVal context As System.ComponentModel.ITypeDescriptorContext, ByVal provider As System.IServiceProvider, ByVal value As Object) As Object
If context Is Nothing OrElse provider Is Nothing _
OrElse context.Instance Is Nothing Then
Return MyBase.EditValue(provider, value)
End If
oEditorService = provider.GetService(GetType(IWindowsFormsEditorService))
If oEditorService IsNot Nothing Then
' Get the Back reference to the Custom Property
Dim oDescriptor As CustomProperty.CustomPropertyDescriptor = context.PropertyDescriptor
Dim cp As CustomProperty = oDescriptor.CustomProperty
' Declare attributes
Dim datasource As UIListboxDatasource
Dim valuemember As UIListboxValueMember
Dim displaymember As UIListboxDisplayMember
' Get attributes
With context.PropertyDescriptor
datasource = .Attributes(GetType(UIListboxDatasource))
valuemember = .Attributes(GetType(UIListboxValueMember))
displaymember = .Attributes(GetType(UIListboxDisplayMember))
End With
With oList
.BorderStyle = BorderStyle.None
.IntegralHeight = True
If datasource IsNot Nothing Then
.DataSource = datasource.Value
End If
If displaymember IsNot Nothing Then
.DisplayMember = displaymember.Value
End If
If valuemember IsNot Nothing Then
.ValueMember = valuemember.Value
End If
If value IsNot Nothing Then
If value.GetType.Name = "String" Then
oList.Text = value
Else
oList.SelectedItem = value
End If
End If
End With
AddHandler oList.SelectedIndexChanged, AddressOf Me.SelectedItem
oEditorService.DropDownControl(oList)
If oList.SelectedIndices.Count = 1 Then
cp.SelectedItem = oList.SelectedItem
cp.SelectedValue = oSelectedValue
value = oList.Text
End If
oEditorService.CloseDropDown()
Else
Return MyBase.EditValue(provider, value)
End If
Return value
End Function
Private Sub SelectedItem(ByVal sender As Object, ByVal e As EventArgs)
If oEditorService IsNot Nothing Then
If oList.SelectedValue IsNot Nothing Then oSelectedValue = oList.SelectedValue
oEditorService.CloseDropDown()
End If
End Sub
Public Class UIListboxDatasource
Inherits Attribute
Private oDataSource As Object
Public Sub New(ByRef Datasource As Object)
oDataSource = Datasource
End Sub
Public ReadOnly Property Value() As Object
Get
Return oDataSource
End Get
End Property
End Class
Public Class UIListboxValueMember
Inherits Attribute
Private sValueMember As String
Public Sub New(ByVal ValueMember As String)
sValueMember = ValueMember
End Sub
Public Property Value() As String
Get
Return sValueMember
End Get
Set(ByVal value As String)
sValueMember = value
End Set
End Property
End Class
Public Class UIListboxDisplayMember
Inherits Attribute
Private sDisplayMember As String
Public Sub New(ByVal DisplayMember As String)
sDisplayMember = DisplayMember
End Sub
Public Property Value() As String
Get
Return sDisplayMember
End Get
Set(ByVal value As String)
sDisplayMember = value
End Set
End Property
End Class
Public Class UIListboxIsDropDownResizable
Inherits Attribute
End Class
End Class
End Namespace
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