Creating Custom Editor
RadGanttView allows you to replace the standard editors with a custom ones. The following examples demonstrates how to replace the spin editor with a track bar editor. All editors inherit from BaseInputEditor. So, you have to inherit from this class and override several methods:
public class GanttViewTrackBarEditor : BaseInputEditor
{
public override object Value
{
get
{
RadTrackBarElement editor = (RadTrackBarElement)this.EditorElement;
return editor.Value;
}
set
{
RadTrackBarElement editor = (RadTrackBarElement)this.EditorElement;
if (value != null && value != DBNull.Value)
{
editor.Value = Convert.ToInt32(value);
}
else
{
editor.Value = 0;
}
}
}
public override void BeginEdit()
{
base.BeginEdit();
this.EditorElement.Focus();
((RadTrackBarElement)this.EditorElement).ValueChanged += new EventHandler(TrackBarEditor_ValueChanged);
}
void TrackBarEditor_ValueChanged(object sender, EventArgs e)
{
this.OnValueChanged();
}
public override bool EndEdit()
{
((RadTrackBarElement)this.EditorElement).ValueChanged -= TrackBarEditor_ValueChanged;
return base.EndEdit();
}
protected override RadElement CreateEditorElement()
{
RadTrackBarElement element = new RadTrackBarElement();
element.Minimum = 0;
element.Maximum = 100;
element.TickStyle = Telerik.WinControls.Enumerations.TickStyles.Both;
element.SmallTickFrequency = 10;
element.LargeTickFrequency = 0;
element.BodyElement.ScaleContainerElement.TrackBarLineElement.Margin = new Padding(0, 3, 0, 3);
return element;
}
public override Type DataType
{
get { return typeof(int); }
}
}
Public Class GanttViewTrackBarEditor
Inherits BaseInputEditor
Public Overrides Property Value() As Object
Get
Dim editor As RadTrackBarElement = DirectCast(Me.EditorElement, RadTrackBarElement)
Return editor.Value
End Get
Set(value As Object)
Dim editor As RadTrackBarElement = DirectCast(Me.EditorElement, RadTrackBarElement)
If value IsNot Nothing AndAlso value IsNot DBNull.Value Then
editor.Value = Convert.ToInt32(value)
Else
editor.Value = 0
End If
End Set
End Property
Public Overrides Sub BeginEdit()
MyBase.BeginEdit()
Me.EditorElement.Focus()
AddHandler DirectCast(Me.EditorElement, RadTrackBarElement).ValueChanged, AddressOf TrackBarEditor_ValueChanged
End Sub
Private Sub TrackBarEditor_ValueChanged(sender As Object, e As EventArgs)
Me.OnValueChanged()
End Sub
Public Overrides Function EndEdit() As Boolean
RemoveHandler DirectCast(Me.EditorElement, RadTrackBarElement).ValueChanged, AddressOf TrackBarEditor_ValueChanged
Return MyBase.EndEdit()
End Function
Protected Overrides Function CreateEditorElement() As RadElement
Dim element As New RadTrackBarElement()
element.Minimum = 0
element.Maximum = 100
element.TickStyle = Telerik.WinControls.Enumerations.TickStyles.Both
element.SmallTickFrequency = 10
element.LargeTickFrequency = 0
element.BodyElement.ScaleContainerElement.TrackBarLineElement.Margin = New Padding(0, 3, 0, 3)
Return element
End Function
Public Overrides ReadOnly Property DataType() As Type
Get
Return GetType(Integer)
End Get
End Property
End Class
In the EditorRequired event you can replace the default editor:
private void GanttViewElement_EditorRequired(object sender, GanttViewEditorRequiredEventArgs e)
{
if (e.EditorType == typeof(GanttViewSpinEditor))
{
e.EditorType = typeof(GanttViewTrackBarEditor);
}
}
Private Sub GanttViewElement_EditorRequired(sender As Object, e As GanttViewEditorRequiredEventArgs)
If (e.EditorType = GetType(GanttViewSpinEditor)) Then
e.EditorType = GetType(GanttViewTrackBarEditor)
End If
End Sub
