[Example] Add shapes drawing example application

Examples/Nodify.Playground/PlaygroundViewModel.cs

@@ -23,7 +23,7 @@ public PlaygroundViewModel()
             Settings.PropertyChanged += OnSettingsChanged;
         }
 
-        private void OnSettingsChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
+        private void OnSettingsChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)
         {
             if (e.PropertyName == nameof(PlaygroundSettings.ShouldConnectNodes))
                 OnPropertyChanged(nameof(ConnectNodesText));

Examples/Nodify.Shapes/App.xaml

@@ -0,0 +1,241 @@
+<Application x:Class="Nodify.Shapes.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+        <ResourceDictionary>
+            <Style x:Key="IconButton"
+                   TargetType="Button"
+                   BasedOn="{StaticResource {x:Type Button}}">
+                <Setter Property="Background"
+                        Value="Transparent" />
+                <Setter Property="BorderBrush"
+                        Value="Transparent" />
+                <Setter Property="Padding"
+                        Value="2" />
+                <Setter Property="Cursor"
+                        Value="Hand" />
+                <Setter Property="Template">
+                    <Setter.Value>
+                        <ControlTemplate TargetType="{x:Type Button}">
+                            <Border x:Name="PART_Border"
+                                    BorderThickness="{TemplateBinding BorderThickness}"
+                                    Background="{TemplateBinding Background}"
+                                    Padding="{TemplateBinding Padding}"
+                                    CornerRadius="3"
+                                    SnapsToDevicePixels="True">
+                                <ContentPresenter x:Name="contentPresenter"
+                                                  Focusable="False"
+                                                  Margin="{TemplateBinding Padding}"
+                                                  SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
+                                                  HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                                                  VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
+                            </Border>
+                        </ControlTemplate>
+                    </Setter.Value>
+                </Setter>
+                <Style.Triggers>
+                    <Trigger Property="IsEnabled"
+                             Value="False">
+                        <Setter Property="Opacity"
+                                Value="0.4" />
+                    </Trigger>
+                </Style.Triggers>
+            </Style>
+
+            <!--ICONS-->
+
+            <DataTemplate x:Key="MinusIcon">
+                <Viewbox Stretch="Fill">
+                    <Grid>
+                        <Path StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M0 0h24v24H0z" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M5 12h14" />
+                    </Grid>
+                </Viewbox>
+            </DataTemplate>
+
+            <DataTemplate x:Key="PlusIcon">
+                <Viewbox Stretch="Fill">
+                    <Grid>
+                        <Path StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M0 0h24v24H0z" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M12 5v14M5 12h14" />
+                    </Grid>
+                </Viewbox>
+            </DataTemplate>
+
+            <DataTemplate x:Key="MaximizeIcon">
+                <Viewbox Stretch="Fill">
+                    <Grid>
+                        <Path StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M0 0h24v24H0z" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M4 8V6a2 2 0 0 1 2-2h2M4 16v2a2 2 0 0 0 2 2h2M16 4h2a2 2 0 0 1 2 2v2M16 20h2a2 2 0 0 0 2-2v-2" />
+                    </Grid>
+                </Viewbox>
+            </DataTemplate>
+
+            <DataTemplate x:Key="CursorIcon">
+                <Viewbox Stretch="Fill"
+                         Margin="2">
+                    <Path Stroke="White"
+                          StrokeThickness="1"
+                          StrokeLineJoin="Round"
+                          StrokeStartLineCap="Round"
+                          StrokeEndLineCap="Round"
+                          Data="M.256.255a.874.874 0 0 0-.18.974l4.753 17.114a.875.875 0 0 0 1.603-.012L10 10l8.334-3.57a.875.875 0 0 0 .01-1.601L1.23.075a.874.874 0 0 0-.974.18Z" />
+                </Viewbox>
+            </DataTemplate>
+
+            <DataTemplate  x:Key="CircleIcon">
+                <Viewbox Stretch="Fill">
+                    <Grid>
+                        <Path StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M0 0h24v24H0z" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M3 12a9 9 0 1 0 18 0 9 9 0 1 0-18 0" />
+                    </Grid>
+                </Viewbox>
+            </DataTemplate>
+
+            <DataTemplate x:Key="SquareIcon">
+                <Viewbox Stretch="Fill">
+                    <Grid>
+                        <Path StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M0 0h24v24H0z" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M3 5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z" />
+                    </Grid>
+                </Viewbox>
+            </DataTemplate>
+
+            <DataTemplate x:Key="TriangleIcon">
+                <Viewbox Stretch="Fill">
+                    <Grid>
+                        <Path StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M0 0h24v24H0z" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M10.363 3.591 2.257 17.125a1.914 1.914 0 0 0 1.636 2.871h16.214a1.914 1.914 0 0 0 1.636-2.87L13.637 3.59a1.914 1.914 0 0 0-3.274 0z" />
+                    </Grid>
+                </Viewbox>
+            </DataTemplate>
+
+            <DataTemplate x:Key="ArrowBackIcon">
+                <Viewbox Stretch="Fill">
+                    <Grid>
+                        <Path StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M0 0h24v24H0z" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="m9 14-4-4 4-4" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M5 10h11a4 4 0 1 1 0 8h-1" />
+                    </Grid>
+                </Viewbox>
+            </DataTemplate>
+
+            <DataTemplate x:Key="ArrowForwardIcon">
+                <Viewbox Stretch="Fill">
+                    <Grid>
+                        <Path StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M0 0h24v24H0z" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="m15 14 4-4-4-4" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M19 10H8a4 4 0 1 0 0 8h1" />
+                    </Grid>
+                </Viewbox>
+            </DataTemplate>
+
+            <DataTemplate x:Key="LockIcon">
+                <Viewbox Stretch="Fill">
+                    <Grid>
+                        <Path StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M0 0h24v24H0z" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M5 13a2 2 0 0 1 2-2h10a2 2 0 0 1 2 2v6a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2v-6z" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M11 16a1 1 0 1 0 2 0 1 1 0 0 0-2 0M8 11V7a4 4 0 1 1 8 0v4" />
+                    </Grid>
+                </Viewbox>
+            </DataTemplate>
+
+            <DataTemplate x:Key="LockOpenIcon">
+                <Viewbox Stretch="Fill">
+                    <Grid>
+                        <Path StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M0 0h24v24H0z" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M5 13a2 2 0 0 1 2-2h10a2 2 0 0 1 2 2v6a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2z" />
+                        <Path Stroke="White"
+                              StrokeLineJoin="Round"
+                              StrokeStartLineCap="Round"
+                              StrokeEndLineCap="Round"
+                              Data="M11 16a1 1 0 1 0 2 0 1 1 0 1 0-2 0M8 11V6a4 4 0 0 1 8 0" />
+                    </Grid>
+                </Viewbox>
+            </DataTemplate>
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

Examples/Nodify.Shapes/App.xaml.cs

@@ -0,0 +1,16 @@
+using System.Windows;
+using System.Windows.Input;
+
+namespace Nodify.Shapes
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+        public App()
+        {
+            EditorGestures.Mappings.Connection.Disconnect.Value = new AnyGesture(new MouseGesture(MouseAction.LeftClick, ModifierKeys.Alt), new MouseGesture(MouseAction.RightClick));
+        }
+    }
+}

Examples/Nodify.Shapes/AppShellViewModel.cs

@@ -0,0 +1,9 @@
+using Nodify.Shapes.Canvas;
+
+namespace Nodify.Shapes
+{
+    public class AppShellViewModel : ObservableObject
+    {
+        public CanvasViewModel Canvas { get; } = new CanvasViewModel();
+    }
+}

Examples/Nodify.Shapes/AssemblyInfo.cs

@@ -0,0 +1,10 @@
+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
+                                                //(used if a resource is not found in the page,
+                                                // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly   //where the generic resource dictionary is located
+                                                //(used if a resource is not found in the page,
+                                                // app, or any theme specific resource dictionaries)
+)]

Examples/Nodify.Shapes/Canvas/CanvasToolbarViewModel.cs

@@ -0,0 +1,93 @@
+using System;
+using System.Linq;
+using System.Windows;
+using System.Windows.Input;
+
+namespace Nodify.Shapes.Canvas
+{
+    public enum CanvasTool
+    {
+        None,
+        Ellipse,
+        Rectangle,
+        Triangle
+    }
+
+    public class CanvasToolbarViewModel : ObservableObject
+    {
+        public static readonly CanvasTool[] AvailableTools = Enum.GetValues(typeof(CanvasTool)).Cast<CanvasTool>().ToArray();
+
+        internal static readonly EditorGestures EditorGestures = new EditorGestures();
+
+        private bool _locked;
+        public bool Locked
+        {
+            get => _locked;
+            set
+            {
+                if (SetProperty(ref _locked, value))
+                {
+                    var newMappings = _locked ? LockedGestureMappings.Instance : EditorGestures;
+                    EditorGestures.Mappings.Apply(newMappings);
+
+                    if (_locked)
+                    {
+                        _selectedTool = CanvasTool.None;
+                        OnPropertyChanged(nameof(SelectedTool));
+                    }
+                }
+            }
+        }
+
+        public ICommand ToggleLockCommand { get; set; }
+
+        private CanvasTool _selectedTool = CanvasTool.None;
+        public CanvasTool SelectedTool
+        {
+            get => _selectedTool;
+            set
+            {
+                if (SetProperty(ref _selectedTool, Locked ? CanvasTool.None : value))
+                {
+                    var newMappings = _selectedTool == CanvasTool.None ? EditorGestures : DrawingGesturesMappings.Instance;
+                    EditorGestures.Mappings.Apply(newMappings);
+                }
+            }
+        }
+
+        public CanvasViewModel Canvas { get; }
+
+        public CanvasToolbarViewModel(CanvasViewModel canvas)
+        {
+            // copy any user modifications
+            EditorGestures.Apply(EditorGestures.Mappings);
+
+            ToggleLockCommand = new DelegateCommand(() => Locked = !Locked);
+            Canvas = canvas;
+        }
+
+        public ShapeViewModel CreateShapeAtLocation(Point location)
+        {
+            using (Canvas.UndoRedo.Batch("Create shape"))
+            {
+                ShapeViewModel shape = SelectedTool switch
+                {
+                    CanvasTool.Ellipse => new EllipseViewModel(),
+                    CanvasTool.Rectangle => new RectangleViewModel(),
+                    CanvasTool.Triangle => new TriangleViewModel(),
+                    CanvasTool.None => throw new InvalidOperationException("Cannot draw in this state"),
+                    _ => throw new NotImplementedException(nameof(CanvasTool)),
+                };
+
+                shape.Location = location;
+                shape.Text = "Double click to edit";
+
+                Canvas.AddShape(shape);
+                Canvas.SelectedShapes.Clear();
+                Canvas.SelectedShapes.Add(shape);
+
+                return shape;
+            }
+        }
+    }
+}