2.1.6

Fixed

• ZoomBehavior using new zoom before Clamp to set Pan. (fixes #141)
• PanChanged not triggering when zooming with the mouse wheel.
• Zoom value decreasing when the mouse wheel delta is zero.
• Ports aren't refreshed when links are added in OnInitializedAsync. (fixes #111)

2.1.4

Added

• MouseDoubleClick (500ms interval) event in Diagram.
• GetScreenPoint in Diagram in order to get the screen points from a diagram point (e.g. node position).
• Title property in NodeModel, used by the default node widget.

Fixed

• ZoomToFit not triggering ZoomChanged event.
• SourceNode and TargetNode not being set in BaseLinkModel when the ports change.

2.1.3

Added

• Multiple demo projects by TrevorDArcyEvans showing:
  • Minimal project setup
  • Custom nodes & links
  • GraphShape layout algorithms

Fixed

• Link labels not appearing (fixes #109).
• ZoomToFit throwing a NullReferenceException when one of the nodes doesn't have a size yet (fixes #118).

2.1.2

Fixed

• Inability to interact with nodes after re-using ids on new node instances.

2.1.1

Fixed

• Exception when navigating to the Options page (#95).
• Portless links not deleted when node is deleted (#96).

2.1.0

Added

• ScaleFactor zoom option (@joezearing)
• Add Constraints options which gives you more control on what happens in the diagram:
  • ShouldDeleteNode: Whether a selected node should be deleted or not
  • ShouldDeleteLink: Whether a selected link should be deleted or not
  • ShouldDeleteGroup: Whether a selected group should be deleted or not
• DeleteSelectionBehavior unit tests

Changes

• Batched more things

2.0.0

Added

• GroupUngrouped event (not the greatest name 😄)
• Touch events TouchStart, TouchMove and TouchEnd
• Mobile support
  • Dragging new links from ports
  • Selecting models
  • Panning
  • Dragging movables
• RemoveGroup method to delete a group and all its children
• Pressing DEL on a selected group will now remove it
• Ability for links to be segmentable (by setting Segmentable to true)
  • Clicking a segmentable link will add a new vertex in that position
  • Vertices are movable models, which mean you can drag them to reposition them
  • Double clicking a vertex will delete it
• Link routers
  • Routers are functions that take into account a link's vertices, and decide whether to add more points along the path
  • They are specified using Options.Links.DefaultRouter or by setting Router in links
  • There are currently two routers, Routers.Normal and Routers.Orthogonal
  • You can provide your own router by simply respecting the delegate Router
• Link path generators
  • Path generators are functions that takes as input a link's route, and return a list of generated SVG paths (strings), as well as the position and angle of the source/target markers
  • They are specified using Options.Links.DefaultPathGenerator or by setting PathGenerator in links
  • There are currently two generators, PathGenerators.Straight and PathGenerators.Smooth
  • You can provide your own generator by simply respecting the delegate PathGenerator
• On-the-fly link markers
  • A link can either have a SourceMarker or TargetMarker
  • Link markers are SVG Paths with a known width (to calculate angle and where to cut the links)
  • Static markers are available (e.g. LinkMarker.Arrow) as well as utility methods to create known shapes
• MouseClick event, which only fires if the model (or canvas) in question didn't move, as opposed to MouseUp
• data-X-id HTML attributes to nodes, ports and links
• Abstract BaseLinkModel, LinkModel now inherits from it
  • All the parts of the library now refer to BaseLinkModel instead of LinkModel (e.g. PortModel.Links)
• Color, SelectedColor and Width properties to LinkModel
• Link labels
  • Can have custom models, using RegisterModelComponent
  • Due to the limitation of SVGs in Blazor, labels aren't interactive and must be created using MarkupString
  • They can have a specified distance
    • A number between 0 and 1: Position relative to the link's length
    • A positive number, greater than 1: Position away from the start
    • A negative number, less than 0: Position away from the end
  • They can have an offset (Point)
• Link snapping
  • While the user is dragging a link, it will try to find the closest port it can attach the link to
  • Options (in DiagramOptions.Links): EnableSnapping and SnappingRadius
• GetBounds extension method on IEnumerable<NodeModel>
• Expose Padding property in GroupModel
• Factory option to Options.Links
  • This is a delegate (BaseLinkModel LinkFactory(DiagramManager diagram, PortModel sourcePort)) to let you control how links are created
• Groups (of type DiagramGroupOptions) option to DiagramOptions
  • Enabled option controls whether users are allow to group nodes together or not
  • KeyboardShortcut (Func<KeyboardEventArgs, bool>) controls what keys need to be pressed to trigger the behavior
  • Factory lets you control how groups are created
• GetRelativePoint method to Diagram
  • This method gives the relative mouse point on the canvas
• SelectionBoxWidget
  • If used, holding SHIFT and clicking then dragging will show a selection box that selects all models intersecting with it
• Minified versions of all assets
• Observe document body mutations to update canvas container
• Ability to add/remove children after the group is created
• Diagram now also inherits Model
• Ability to suspend refreshes in Diagram by setting Diagram.SuspendRefresh to true
  • As the name suggests, this will stop the method Refresh from triggering the event Changed, which tries to re-render the UI
• Batch(Action action) in Diagram.
  • This is just a helper method that suspends refreshes, runs the action and then refreshes
  • This is now used internally in node/link layers to only trigger 1 UI re-render
• Add FillColor parameter to NavigatorWidget
• Ability to create links between two nodes directly, without needing ports
  • This depends on the shape of the nodes, which can be defined by providing a ShapeDefiner in NodeModel's constructor
  • The default shape definer is Shapes.Rectangle
  • Currently, there is only the Rectangle and Ellipse (including Circle) shapes, others will be added later
  • This also works for groups, since groups are nodes
• Unit tests

Changed

• Renamed DiagramManager to Diagram
• Remove need to specify Name in diagram's CascadingValue
• Separate Nodes/Links from DiagramManager, they are now layers (Diagram.Nodes and Diagram.Links)
• • Adding/Removing nodes or links is now done inside these layers (e.g. Diagram.Nodes.Add)
  • Added/Removed events are now inside these layers, not in the diagram (e.g. Diagram.Links.Added)
• LinkAttached event removed (TargetPortChanged is the alternative)
• It is now mandatory to add nodes to diagram before creating groups
• SelectionChanged event only contains the model now, use Selected property
• Removed SelectedModels in favor of GetSelectedModels(), this is because we don't hold a list of selected models anymore (unnecessary)
• Renamed DiagramSubManager to Behavior, it makes more sense
• RegisterBehavior now takes as an argument the behavior instance to add. No need to use Activator.CreateInstance for something like this, as it just slows things down
• Removed LinkType enum
• Removed DefaultLinkType link option
• Removed DefaultLinkModel link option
• Removed GetNodesRect method from DiagramManager (use GetBounds)
• Removed diagram dependency from GroupModel (was only using GetNodesRect)
• Renamed GetRelativePoint to GetRelativeMousePoint
  • This method gives the relative mouse point inside the diagram, taking into account the current pan & zoom
• Widgets are inside the DiagramCanvas now
  • This change is necessary so that widgets with absolute position have their relative parent be the canvas
• Renamed Navigator widget to NavigatorWidget
• Allow empty groups
• Compare received JS sizes (width and height) with precision of 0.0001
  • In most cases, sizes retrieved from JS (especially with a zoom <> 1) can't be compared accurately (e.g. 80 and 79.9999975). We fix this by comparing with a tolerance.
• Update ports dimensions only if Initialized is false
  • This avoids useless re-renders/JS calls when node is re-visible
• NodeModel.Ports is now a IReadOnlyList<PortModel>
• BaseLinkModelExtensions is now obsolete
• Moved everything in Blazor.Diagrams.Core.Models.Core to Blazor.Diagrams.Core.Geometry
  • This includes Point, Size and Rectangle
  • This is to better structure things in the project, the new Geometry namespace will contain many other things related to it
• Only render links when ports/nodes are initialized (position and/or size received)
  • This will avoid the weird flicker where links show at (0, 0) then move to the correct position

Fixed

• Remove links when groups are removed
• Issue where links are clickable outside the visible stroke
  • pointer-events is now set to visiblePainted instead of all
• MouseUp event bubbles up from PortModel to NodeModel
• Size not taking into account zoom when nodes become visible again
• Only allow link creation using left mouse button
• JS errors in razor pages without a diagram
• CustomNodeWidget was movable from text input
  • All users who create custom nodes with HTML inputs should use x:stopPropagation on mousedown, mousemove and mouseup to prevent the node from being movable through inputs.
• Deleted nodes from groups would still show them
• NavigatorWidget not handling negative node positions
• Panning with right click. It is now disallowed
• PortRender not taking into account its parent's RenderLayer
  • Ports on SVG nodes will now render as <g> elements
• Useless refreshes when diagram Container values didn't change

1.5.2

Fixed

• Missing MouseUp event on links.

1.5.1

Added

• AddGroup: add an instance of a group to the diagram.
• Custom group documentation/demo.

Fixed

• Clicking the canvas in the Events demo throws an exception.

1.5.0

Added

• The ability to have ports on groups.
• EXPERIMENTAL/INCOMPLETE Nested groups. Since GroupModel now inherits NodeModel, it became possible to have nested groups, but there are still problems with the order of links between groups.
• A Class parameter to GroupContainer.

Changed

• Only rerender groups when necessary.
• Receiving the same size from ResizeObserver doesn't trigger a rerender anymore.
• Avoid rerendering ports twice to update positions.
• Avoid rerendering ports when their parent node is moving.
• Padding is now handled in GroupModel instead of GroupContainer (UI). This is because the padding is necessary to have accurate size/position in the group model directly.

Fixed

• Use @key when rendering the list of groups. Not using it caused big/weird render times.
• Groups not showing in Navigator/Overview.