/// <summary>
/// Initializes dragging of a line segment.
/// </summary>
/// <seealso cref="AutoPosModeOnly"/>
/// <param name="e">The <see cref="T:System.Windows.Input.MouseButtonEventArgs"/> that contains the event data. This event data reports details about the mouse button that was pressed and the handled state.</param>
protected override void OnMouseDown(MouseButtonEventArgs e)
{
if (e.ChangedButton == MouseButton.Left && !AutoPosModeOnly)
{
segmentDragging = true;
dragLast = e.GetPosition(XCaseCanvas);
int i = JunctionGeometryHelper.FindHitSegmentIndex(dragLast, Points);
affectedPoints = new JunctionPoint[] { Points[i], Points[i + 1] };
startPositions = new Dictionary <DragThumb, rPoint>();
if (affectedPoints[0].Movable)
{
startPositions[affectedPoints[0]] = new rPoint(affectedPoints[0].Position)
{
tag = affectedPoints[0].Placement
}
}
;
if (affectedPoints[1].Movable)
{
startPositions[affectedPoints[1]] = new rPoint(affectedPoints[1].Position)
{
tag = affectedPoints[1].Placement
}
}
;
this.CaptureMouse();
}
base.OnMouseDown(e);
}
/// <summary>
/// Returns context menu items for junction.
/// </summary>
/// <returns></returns>
internal IEnumerable <ContextMenuItem> JunctionMenuItems()
{
if (!AutoPosModeOnly)
{
ContextMenuItem breakCommand = new ContextMenuItem("Break line here");
breakCommand.Click += delegate
{
ViewController.BreakLine(downPos,
JunctionGeometryHelper.FindHitSegmentIndex(downPos, Points) + 1,
viewHelperPointsCollection, XCaseCanvas.Controller);
};
ContextMenuItem autoPosEndsCommand = new ContextMenuItem("Line ends auto-position");
autoPosEndsCommand.Click += delegate
{
StartPoint.Placement = EPlacementKind.ParentAutoPos;
EndPoint.Placement = EPlacementKind.ParentAutoPos;
InvalidateGeometry();
};
if (this.Association != null)
{
ContextMenuItem removeEndCommand = new ContextMenuItem("Remove from association");
removeEndCommand.Click += delegate
{
Association.Controller.RemoveAssociationEnd(this.AssociationEnd.AssociationEnd);
};
return(new[] { breakCommand, autoPosEndsCommand, removeEndCommand });
}
return(new[] { breakCommand, autoPosEndsCommand });
}
else
{
return(new ContextMenuItem[0]);
}
}