Exemple #1
0
        // walk the visual tree of adornment elements
        private void RenderHandles(FrameworkElement elt)
        {
            if (elt == null)
            {
                return;
            }
            Path path = elt as Path;

            if (path != null) // if it's a Path
            // and if NodePanel.Figure is specified and is None, it's a SelectionHandle equivalent
            {
                NodeFigure fig = NodePanel.GetFigure(elt);
                if (fig == NodeFigure.None)                                                                // must explicitly set go:NodePanel.Figure="None", to distinguish this selection handle from random Path shapes
                {
                    Shape adornedshape = this.AdornedElement as Shape;                                     // hack: because GetSelectionGeometry doesn't always return a Geometry of the AdornedElement's size
                    if (adornedshape != null && this.AdornedPart is Node &&
                        ((adornedshape is Path && NodePanel.GetFigure(adornedshape) != NodeFigure.None) || // when that Path is a NodeShape equivalent
                         adornedshape is Polygon || adornedshape is Polyline))                             // or is a Polygon or Polyline
                    {
                        path.Stretch = Stretch.Fill;
                        Size sz = GetEffectiveSize(adornedshape); // can't just use ActualWidth/Height, because measuring has reset them to zero
                        path.Width  = sz.Width;
                        path.Height = sz.Height;
                    }
                    path.Data = GetSelectionGeometry(path, this);
                }
                else // otherwise assume it's a ToolHandle equivalent
                {
                    if (path.Data == null)
                    {
                        path.Stretch = Stretch.Fill;
                        path.Data    = GetFigureGeometry(path); // returns a Geometry with points from 0,0 to 1,1
                    }
                }
            }
            else
            {
                int count = VisualTreeHelper.GetChildrenCount(elt);
                for (int i = 0; i < count; i++)
                {
                    RenderHandles(VisualTreeHelper.GetChild(elt, i) as FrameworkElement);
                }
            }
        }
Exemple #2
0
        private void RenderNodeShape(UIElement elt, Size sz)
        {
            if (elt == null)
            {
                return;
            }
            Path path = elt as Path;

            if (path != null) // if it's a Path
            // and if NodePanel.Figure is specified, it's a NodeShape equivalent
            {
                NodeFigure fig = NodePanel.GetFigure(elt);
                if (fig != NodeFigure.None)
                {
                    path.Stretch = Stretch.Fill;
                    path.Data    = new NodeGeometry(path).GetGeometry(sz);
                    // this also has the side-effect of setting any default Spot1/Spot2 parameters
                }
            }
        }
Exemple #3
0
        // return a Geometry that is unscaled (all points are from 0,0 to 1,1)
        //?? need to use NodeShape some day; promote this stuff to NodePanel also, to implement NodeShape equivalent
        internal static Geometry GetFigureGeometry(Shape elt)
        {
            switch (NodePanel.GetFigure(elt))
            {
            default:
            case NodeFigure.Rectangle:

                Geometry



                    _RectangleFigure = new RectangleGeometry()
                {
                    Rect = new Rect(0, 0, 1, 1)
                };
                return(_RectangleFigure);

            case NodeFigure.Ellipse:

                Geometry



                    _EllipseFigure = new EllipseGeometry()
                {
                    Center  = new Point(0.5, 0.5),
                    RadiusX = 0.5,
                    RadiusY = 0.5
                };
                return(_EllipseFigure);

            case NodeFigure.Diamond:

                Geometry



                    _DiamondFigure = new PathGeometry()
                {
                    Figures = new PathFigureCollection()
                    {
                        new PathFigure()
                        {
                            StartPoint = new Point(0.5, 0),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(1, 0.5)
                                },
                                new LineSegment()
                                {
                                    Point = new Point(0.5, 1)
                                },
                                new LineSegment()
                                {
                                    Point = new Point(0, 0.5)
                                }
                            },
                            IsClosed = true
                        }
                    }
                };
                return(_DiamondFigure);

            case NodeFigure.TriangleRight:

                Geometry



                    _TriangleRightFigure = new PathGeometry()
                {
                    Figures = new PathFigureCollection()
                    {
                        new PathFigure()
                        {
                            StartPoint = new Point(0, 0),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(1, 0.5)
                                },
                                new LineSegment()
                                {
                                    Point = new Point(0, 1)
                                }
                            },
                            IsClosed = true
                        }
                    }
                };
                return(_TriangleRightFigure);

            case NodeFigure.TriangleDown:

                Geometry



                    _TriangleDownFigure = new PathGeometry()
                {
                    Figures = new PathFigureCollection()
                    {
                        new PathFigure()
                        {
                            StartPoint = new Point(0, 0),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(1, 0)
                                },
                                new LineSegment()
                                {
                                    Point = new Point(0.5, 1)
                                }
                            },
                            IsClosed = true
                        }
                    }
                };
                return(_TriangleDownFigure);

            case NodeFigure.TriangleLeft:

                Geometry



                    _TriangleLeftFigure = new PathGeometry()
                {
                    Figures = new PathFigureCollection()
                    {
                        new PathFigure()
                        {
                            StartPoint = new Point(1, 1),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(0, 0.5)
                                },
                                new LineSegment()
                                {
                                    Point = new Point(1, 0)
                                }
                            },
                            IsClosed = true
                        }
                    }
                };
                return(_TriangleLeftFigure);

            case NodeFigure.TriangleUp:

                Geometry



                    _TriangleUpFigure = new PathGeometry()
                {
                    Figures = new PathFigureCollection()
                    {
                        new PathFigure()
                        {
                            StartPoint = new Point(1, 1),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(0, 1)
                                },
                                new LineSegment()
                                {
                                    Point = new Point(0.5, 0)
                                }
                            },
                            IsClosed = true
                        }
                    }
                };
                return(_TriangleUpFigure);

            case NodeFigure.PlusLine:

                Geometry



                    _PlusLineFigure = new PathGeometry()
                {
                    Figures = new PathFigureCollection()
                    {
                        new PathFigure()
                        {
                            StartPoint = new Point(0.5, 0),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(0.5, 1)
                                }
                            },
                            IsClosed = false
                        },
                        new PathFigure()
                        {
                            StartPoint = new Point(0, 0.5),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(1, 0.5)
                                }
                            },
                            IsClosed = false
                        }
                    }
                };
                return(_PlusLineFigure);

            case NodeFigure.XLine:

                Geometry



                    _XLineFigure = new PathGeometry()
                {
                    Figures = new PathFigureCollection()
                    {
                        new PathFigure()
                        {
                            StartPoint = new Point(0, 0),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(1, 1)
                                }
                            },
                            IsClosed = false
                        },
                        new PathFigure()
                        {
                            StartPoint = new Point(1, 0),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(0, 1)
                                }
                            },
                            IsClosed = false
                        }
                    }
                };
                return(_XLineFigure);

            case NodeFigure.AsteriskLine:

                Geometry



                    _AsteriskLineFigure = new PathGeometry()
                {
                    Figures = new PathFigureCollection()
                    {
                        new PathFigure()
                        {
                            StartPoint = new Point(0.5, 0),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(0.5, 1)
                                }
                            },
                            IsClosed = false
                        },
                        new PathFigure()
                        {
                            StartPoint = new Point(0, 0.5),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(1, 0.5)
                                }
                            },
                            IsClosed = false
                        },
                        new PathFigure()
                        {
                            StartPoint = new Point(0, 0),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(1, 1)
                                }
                            },
                            IsClosed = false
                        },
                        new PathFigure()
                        {
                            StartPoint = new Point(1, 0),
                            Segments   = new PathSegmentCollection()
                            {
                                new LineSegment()
                                {
                                    Point = new Point(0, 1)
                                }
                            },
                            IsClosed = false
                        }
                    }
                };
                return(_AsteriskLineFigure);
            }
        }
Exemple #4
0
        /// <summary>
        /// You still need to set its <c>Stroke</c>, <c>StrokeThickness</c>, <c>Fill</c>, et al, as with any <c>Shape</c>.
        /// </summary>
        public ToolHandle()
        {
            NodePanel.SetFigure(this, NodeFigure.Rectangle);

            this.Stretch = Stretch.Fill; // because GetFigureGeometry always returns a Geometry with unscaled points from 0,0 to 1,1
        }