internal bool HandleMouseMove(object sender, Point mouseCursor)
{
if (this.currentState == State.Connection)
{
// If we are currently connecting and there is an active
// connector, redraw it to match the new mouse coordinates.
owningWorkspace.UpdateActiveConnector(mouseCursor);
}
else if (this.currentState == State.WindowSelection)
{
// When the mouse is held down, reposition the drag selection box.
double x = Math.Min(mouseDownPos.X, mouseCursor.X);
double y = Math.Min(mouseDownPos.Y, mouseCursor.Y);
double width = Math.Abs(mouseDownPos.X - mouseCursor.X);
double height = Math.Abs(mouseCursor.Y - mouseDownPos.Y);
// We perform cross selection (i.e. select a node whenever
// it touches the selection box as opposed to only select
// it when it is entirely within the selection box) when
// mouse moves in the opposite direction (i.e. the current
// mouse position is smaller than the point mouse-down
// happened).
//
bool isCrossSelection = mouseCursor.X < mouseDownPos.X;
SelectionBoxUpdateArgs args = null;
args = new SelectionBoxUpdateArgs(x, y, width, height);
args.SetSelectionMode(isCrossSelection);
this.owningWorkspace.RequestSelectionBoxUpdate(this, args);
var rect = new Rect(x, y, width, height);
var command = new DynCmd.SelectInRegionCommand(rect, isCrossSelection);
DynamoViewModel dynamoViewModel = dynSettings.Controller.DynamoViewModel;
dynamoViewModel.ExecuteCommand(command);
}
else if (this.currentState == State.DragSetup)
{
// There are something in the selection, but none is ILocatable.
if (!DynamoSelection.Instance.Selection.Any((x) => (x is ILocatable)))
{
SetCurrentState(State.None);
return(false);
}
// Record and begin the drag operation for selected nodes.
var operation = DynCmd.DragSelectionCommand.Operation.BeginDrag;
var command = new DynCmd.DragSelectionCommand(mouseCursor, operation);
DynamoViewModel dynamoViewModel = dynSettings.Controller.DynamoViewModel;
dynamoViewModel.ExecuteCommand(command);
SetCurrentState(State.NodeReposition);
return(true);
}
else if (this.currentState == State.NodeReposition)
{
// Update the dragged nodes (note: this isn't recorded).
owningWorkspace.UpdateDraggedSelection(mouseCursor);
}
return(false); // Mouse event not handled.
}
internal bool HandleMouseMove(object sender, Point mouseCursor)
{
if (this.currentState == State.Connection)
{
// If we are currently connecting and there is an active
// connector, redraw it to match the new mouse coordinates.
owningWorkspace.UpdateActiveConnector(mouseCursor);
}
else if (this.currentState == State.WindowSelection)
{
// When the mouse is held down, reposition the drag selection box.
double x = Math.Min(mouseDownPos.X, mouseCursor.X);
double y = Math.Min(mouseDownPos.Y, mouseCursor.Y);
double width = Math.Abs(mouseDownPos.X - mouseCursor.X);
double height = Math.Abs(mouseCursor.Y - mouseDownPos.Y);
// We perform cross selection (i.e. select a node whenever
// it touches the selection box as opposed to only select
// it when it is entirely within the selection box) when
// mouse moves in the opposite direction (i.e. the current
// mouse position is smaller than the point mouse-down
// happened).
//
bool isCrossSelection = mouseCursor.X < mouseDownPos.X;
SelectionBoxUpdateArgs args = null;
args = new SelectionBoxUpdateArgs(x, y, width, height);
args.SetSelectionMode(isCrossSelection);
this.owningWorkspace.RequestSelectionBoxUpdate(this, args);
var rect = new Dynamo.Utilities.Rect2D(x, y, width, height);
var command = new DynCmd.SelectInRegionCommand(rect, isCrossSelection);
owningWorkspace.DynamoViewModel.ExecuteCommand(command);
}
else if (this.currentState == State.DragSetup)
{
// There are something in the selection, but none is ILocatable.
if (!DynamoSelection.Instance.Selection.Any((x) => (x is ILocatable)))
{
SetCurrentState(State.None);
return(false);
}
if (Keyboard.Modifiers != ModifierKeys.Control)
{
// Record and begin the drag operation for selected nodes.
var operation = DynCmd.DragSelectionCommand.Operation.BeginDrag;
var command = new DynCmd.DragSelectionCommand(
mouseCursor.AsDynamoType(),
operation);
owningWorkspace.DynamoViewModel.ExecuteCommand(command);
SetCurrentState(State.NodeReposition);
return(true);
}
}
else if (this.currentState == State.NodeReposition)
{
// Update the dragged nodes (note: this isn't recorded).
owningWorkspace.UpdateDraggedSelection(mouseCursor.AsDynamoType());
var draggedGroups = DynamoSelection.Instance.Selection.OfType <AnnotationModel>();
// Here we check if the mouse cursor is inside any Annotation groups
var dropGroups = owningWorkspace.Annotations
.Where(x =>
!draggedGroups.Select(a => a.GUID).Contains(x.AnnotationModel.GUID) &&
x.IsExpanded &&
x.AnnotationModel.Rect.Contains(mouseCursor.X, mouseCursor.Y));
// In scenarios where there are nested groups, the above will return both
// the nested group and the parent group, as the mouse coursor will be inside
// both of there rects. In these cases we want to get group that is nested
// inside the parent group.
var dropGroup = dropGroups
.FirstOrDefault(x => !x.AnnotationModel.HasNestedGroups) ?? dropGroups.FirstOrDefault();
// If the dropGroup is null or any of the selected items is already in the dropGroup,
// we disable the drop border by setting NodeHoveringState to false
var draggedModels = DynamoSelection.Instance.Selection
.OfType <ModelBase>()
.Except(draggedGroups.SelectMany(x => x.Nodes));
if (dropGroup is null ||
draggedModels
.Any(x => owningWorkspace.Model.Annotations.ContainsModel(x)))
{
owningWorkspace.Annotations
.Where(x => x.NodeHoveringState)
.ToList()
.ForEach(x => x.NodeHoveringState = false);
}
// If we are dragging groups over a group that is already nested
// we return as we cant have more than one nested layer
else if (draggedGroups.Any() &&
owningWorkspace.Model.Annotations.ContainsModel(dropGroup.AnnotationModel) ||
draggedGroups.Any(x => x.HasNestedGroups))
{
return(false); // Mouse event not handled.
}
// If the dropGroups NodeHoveringState is set to false
// we need to set it to true for the drop border to be displayed.
else if (!dropGroup.NodeHoveringState)
{
// make sure there are no other group
// set to NodeHoveringState before setting
// the current group.
// If we dont do this there are scenarios where
// two groups are very close and a node is dragged
// quickly between the two where the hovering state
// is not reset.
owningWorkspace.Annotations
.Where(x => x.NodeHoveringState)
.ToList()
.ForEach(x => x.NodeHoveringState = false);
// If the dropGroup belongs to another group
// we need to check if the parent group is collapsed
// if it is we dont want to be able to add new
// models to the drop group.
var parentGroup = owningWorkspace.Annotations
.Where(x => x.AnnotationModel.ContainsModel(dropGroup.AnnotationModel))
.FirstOrDefault();
if (parentGroup != null && !parentGroup.IsExpanded)
{
return(false);
}
dropGroup.NodeHoveringState = true;
}
}