Gets a value indicating whether this AnnAutomation is in a state where objects can be grouped together.
public virtual bool CanGroup { get; }
Public Overridable ReadOnly Property CanGroup As Boolean
public:
virtual property bool CanGroup {
bool get();
}
true if this AnnAutomation is in a state where objects can be grouped together, otherwise; false.
The AnnAutomation is in a state where objects can be grouped together when 2 or more objects are in an edit state.
Call the Group method to group the objects currently being edited together.
Note, when you select one or more objects in this AnnAutomation through the user interface, an AnnGroupObject will be created and the selected objects are moved from the Container to this AnnGroupObject. This AnnGroupObject is a temporary group and will be ungrouped (by calling AnnGroupObject.Ungroup) and added back to the Container when the objects are not selected anymore (for example, by clicking somewhere in the container outside the group or by calling the user interface or by calling SelectNone). To check if the current editing object is the temporary group, first check if the CurrentEditObject is an AnnGroupObject, then check if the AnnGroupObject.Temporary value is set to true.
For more information about grouping and ungrouping, refer to Grouping and Ungrouping Annotation Objects (Deprecated).
This example will add two objects into the automation and then group them together.
using Leadtools;
using Leadtools.Annotations;
using Leadtools.WinForms;
using Leadtools.Drawing;
public void AnnAutomation_CanGroup(AnnAutomation automation)
{
ShowStatus(automation);
// first, add two objects to the automation
AnnRectangleObject rectObj = new AnnRectangleObject();
rectObj.Bounds = new AnnRectangle(100, 100, 100, 100, AnnUnit.Pixel);
rectObj.Pen = new AnnPen(Color.Blue, new AnnLength(1, AnnUnit.Pixel));
rectObj.Brush = null;
automation.Container.Objects.Add(rectObj);
automation.Viewer.Invalidate(rectObj.InvalidRectangle);
ShowStatus(automation);
AnnLineObject lineObj = new AnnLineObject();
lineObj.StartPoint = new AnnPoint(100, 100, AnnUnit.Pixel);
lineObj.EndPoint = new AnnPoint(200, 200, AnnUnit.Pixel);
lineObj.Pen = new AnnPen(Color.Red, new AnnLength(1, AnnUnit.Pixel));
automation.Container.Objects.Add(lineObj);
automation.Viewer.Invalidate(lineObj.InvalidRectangle);
ShowStatus(automation);
// "select" both objects
automation.StartEditing(rectObj, false);
ShowStatus(automation);
automation.StartEditing(lineObj, true);
ShowStatus(automation);
// make this group object a true group
if (automation.CanGroup)
{
automation.Group();
ShowStatus(automation);
}
// ungroup to again to the origina 2 objects
if (automation.CanUngroup)
{
automation.Ungroup();
ShowStatus(automation);
}
}
private void ShowStatus(AnnAutomation automation)
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
sb.Append("Number of objects: ");
sb.Append(automation.Container.Objects.Count);
sb.Append(Environment.NewLine);
sb.Append("Object currently being edited: ");
if (automation.CurrentEditObject != null)
{
sb.Append(automation.CurrentEditObject.GetType().Name);
if (automation.CurrentEditObject is AnnGroupObject)
{
sb.Append(", Temporary: ");
AnnGroupObject group = automation.CurrentEditObject as AnnGroupObject;
sb.Append(group.Temporary);
}
}
else
sb.Append("None");
sb.Append(Environment.NewLine);
sb.Append("CanGroup: ");
sb.Append(automation.CanGroup);
sb.Append(", CanUngroup: ");
sb.Append(automation.CanUngroup);
MessageBox.Show(sb.ToString());
}
Imports Leadtools
Imports Leadtools.Annotations
Imports Leadtools.WinForms
Imports Leadtools.Drawing
Public Sub AnnAutomation_CanGroup(ByVal automation As AnnAutomation)
ShowStatus(automation)
' first, add two objects to the automation
Dim rectObj As AnnRectangleObject = New AnnRectangleObject()
rectObj.Bounds = New AnnRectangle(100, 100, 100, 100, AnnUnit.Pixel)
rectObj.Pen = New AnnPen(Color.Blue, New AnnLength(1, AnnUnit.Pixel))
rectObj.Brush = Nothing
automation.Container.Objects.Add(rectObj)
automation.Viewer.Invalidate(rectObj.InvalidRectangle)
ShowStatus(automation)
Dim lineObj As AnnLineObject = New AnnLineObject()
lineObj.StartPoint = New AnnPoint(100, 100, AnnUnit.Pixel)
lineObj.EndPoint = New AnnPoint(200, 200, AnnUnit.Pixel)
lineObj.Pen = New AnnPen(Color.Red, New AnnLength(1, AnnUnit.Pixel))
automation.Container.Objects.Add(lineObj)
automation.Viewer.Invalidate(lineObj.InvalidRectangle)
ShowStatus(automation)
' "select" both objects
automation.StartEditing(rectObj, False)
ShowStatus(automation)
automation.StartEditing(lineObj, True)
ShowStatus(automation)
' make this group object a true group
If automation.CanGroup Then
automation.Group()
ShowStatus(automation)
End If
' ungroup to again to the origina 2 objects
If automation.CanUngroup Then
automation.Ungroup()
ShowStatus(automation)
End If
End Sub
Private Sub ShowStatus(ByVal automation As AnnAutomation)
Dim sb As System.Text.StringBuilder = New System.Text.StringBuilder()
sb.Append("Number of objects: ")
sb.Append(automation.Container.Objects.Count)
sb.Append(Environment.NewLine)
sb.Append("Object currently being edited: ")
If Not automation.CurrentEditObject Is Nothing Then
sb.Append(automation.CurrentEditObject.GetType().Name)
If TypeOf automation.CurrentEditObject Is AnnGroupObject Then
sb.Append(", Temporary: ")
Dim group As AnnGroupObject = CType(IIf(TypeOf automation.CurrentEditObject Is AnnGroupObject, automation.CurrentEditObject, Nothing), AnnGroupObject)
sb.Append(group.Temporary)
End If
Else
sb.Append("None")
End If
sb.Append(Environment.NewLine)
sb.Append("CanGroup: ")
sb.Append(automation.CanGroup)
sb.Append(", CanUngroup: ")
sb.Append(automation.CanUngroup)
MessageBox.Show(sb.ToString())
End Sub
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