aistudio-wpf-diagram/AIStudio.Wpf.DiagramDesigner.Demo/ViewModels/SnapToGridViewModel.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;

namespace AIStudio.Wpf.DiagramDesigner.Demo.ViewModels
{
    class SnapToGridViewModel : BaseViewModel
    {
        public SnapToGridViewModel()
        {
            Title = "Snap to Grid";
            Info = "This diagram has a grid size of 100, moving nodes will make them automatically snap.";

            _service.ColorViewModel.FillColor.Color = System.Windows.Media.Colors.Orange;

            DiagramViewModel = new DiagramViewModel();          
            DiagramViewModel.CellHorizontalAlignment = CellHorizontalAlignment.Center;
            DiagramViewModel.CellVerticalAlignment = CellVerticalAlignment.Center;
            DiagramViewModel.PageSizeType = PageSizeType.Custom;
            DiagramViewModel.PageSize = new Size(double.NaN, double.NaN);

            DefaultDesignerItemViewModel node1 = new DefaultDesignerItemViewModel() { Left = 50, Top = 50, Text = "1" };
            DiagramViewModel.DirectAddItemCommand.Execute(node1);

            DefaultDesignerItemViewModel node2 = new DefaultDesignerItemViewModel() { Left = 300, Top = 300, Text = "2" };
            DiagramViewModel.DirectAddItemCommand.Execute(node2);

            DefaultDesignerItemViewModel node3 = new DefaultDesignerItemViewModel() { Left = 300, Top = 50, Text = "3" };
            DiagramViewModel.DirectAddItemCommand.Execute(node3);

            ConnectionViewModel connector1 = new ConnectionViewModel(node1.RightConnector, node2.LeftConnector, DrawMode.ConnectingLineSmooth, RouterMode.RouterNormal);
            DiagramViewModel.DirectAddItemCommand.Execute(connector1);

            ConnectionViewModel connector2 = new ConnectionViewModel(node2.RightConnector, node3.RightConnector, DrawMode.ConnectingLineStraight, RouterMode.RouterOrthogonal);
            DiagramViewModel.DirectAddItemCommand.Execute(connector2);

        }
    }
}