/// <summary>
/// Handels all necessary steps to start dragging
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void StartDragging(object sender, MouseButtonEventArgs e)
{
MouseHelper.TrapMouseInsideControl(editorBorder);
_selectedComponent = (WorkflowComponentUserControl)sender;
if (e.OriginalSource is Ellipse)
{
var component = _selectedComponent.Component;
_customPath = new CustomPath(component, new Point(component.X + 95, component.Y + ComponentHeight / 2 - ComponentPadding));
editorCanvas.Children.Add(_customPath.Path);
MouseMove += MovePath;
WorkflowComponentUserControls.ForEach(comp => comp.NewSource(_selectedComponent.Component));
}
else
{
_startPoint = e.GetPosition(_selectedComponent);
MouseMove += MoveComponent;
}
}
/// <summary>
/// Draws all connections between components of this workflow
/// </summary>
private void DrawConnections()
{
foreach (var item in Workflow.Components)
{
var source = new Point(item.X + 95, item.Y + ComponentHeight / 2 - ComponentPadding);
foreach (var id in item.ConnectedTo)
{
WorkflowComponent nextComponent = Workflow.GetNext(id);
Point destination = new Point(nextComponent.X + ComponentPadding - 5, nextComponent.Y + ComponentHeight / 2 - ComponentPadding);
var path = new CustomPath(item, source, destination)
{
Destination = nextComponent
};
path.Path.MouseLeftButtonDown += DeleteConnection;
editorCanvas.Children.Add(path.Path);
_myLines.Add(path);
}
}
}
/// <summary>
/// Finishes the drag and drop action
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void FinishMoving(object sender, MouseButtonEventArgs e)
{
MouseHelper.ClearMouseTrap();
if (_selectedComponent != null)
{
_startPoint = new Point();
MouseMove -= MoveComponent;
_selectedComponent = null;
}
if (_customPath != null)
{
MouseMove -= MovePath;
editorCanvas.Children.Remove(_customPath.Path);
if (CurrentHoveredComponent != null)
{
AddConnection(_customPath.Source, (CurrentHoveredComponent as WorkflowComponentUserControl).Component);
}
_customPath = null;
DrawCanvas(this, null);
}
}