0.5

Special thanks to everyone who contributed to this release with a pr!

New features

• Introduced the minimap #99
  • Just one function call is required: MiniMap()!
• Programmatic interface to handle node and link selections #107 Introduces the functions
  • SelectNode
  • ClearNodeSelection
  • IsNodeSelected
  • SelectLink
  • ClearLinkSelection
  • IsLinkSelected
• Auto-panning pans the editor automatically if the mouse goes outside the editor canvas while dragging nodes or links #120
• Add ImGui-like user defined callbacks for minimap node hovering events #127
  • ImNodesMiniMapNodeHoveringCallback and ImNodesMiniMapNodeHoveringCallbackUserData added to imnodes.h

The minimap in action!

Other changes

• Render canvas gridlines by default in the light color scheme to be more consistent with ImGui.

Fixes

• Prevent interaction with node graph if an ImGui widget is active. Fixes problems where the nodes underneath a color wheel move while manipulating the wheel.
• Fixing some unresponsive UI issues arising from the reuse of internal ids #124
• Prevents links from being hovered if a pin is hovered #126

Breaking changes

• The code was reformatted to be more consistent with ImGui #95
  • Namespace renamed to ImNodes
  • The namespace is configurable, by defining IMNODES_NAMESPACE
  • All internal functions now CamelCase
  • Enums constants prefixed with ImNodes

0.4

New features

• New depth sorting of nodes. Selection of overlapping nodes now handled correctly -- clicking on a node will place it on top of other overlapping nodes.

• New querying functions

  • GetNodeGridSpacePos;
  • GetNodeScreenSpacePos
  • IsLinkCreated

• Functions for clearing selections

  • ClearNodeSelection
  • ClearLinkSelection

• DLL support was added. Library initialization and shutdown now resembles ImGui.

  • SetImGuiContext
  • CreateContext
  • DestroyContext
  • GetCurrentContext
  • SetCurrentContext

Fixes

• Some recangle-line overlap edge casess were fixed
• Hovering, dragging, and middle click selection bugs were fixed. Only single pins, links, and nodes can be interacted with at the same time.
• Solved an id issue causing node selection bugs
• Render nodes on top of links, solving #56
• Fixed #55
• Fixed #54

Breaking changes

• Removed imnodes::IO::emulate_three_button_mouse::modifier.
• Initialize and Shutdown removed in favor of CreateContext and DestroyContext.

Known issues

• Overlapping ImGui widgets can interact #90
• There are some issues with reusing ids #91

0.3

Huge thanks to everyone who contributed to items in this release!

New features

• Links snap to pins when close
• Added EditorContextGetPanning() to access the current panning state of the editor
• Added static attributes for node attributes which don't have a pin, along with EndInputAttribute(), EndOutputAttribute, and EndStaticAttribute.
• EndAttribute() was deprecated with a compiler warning.
• Enable editor panning with a pressed modifier to better support trackpads (enable via IO::emulate_three_button_mouse)
• Added IsEditorHovered() to better detect when the mouse is over the node editor canvas.
• Added IsLinkDestroyed(int*) to signal to the user that the editor has deleted a link. This was added so that the user can detach an existing link from a pin.

Three new ways of interacting with links have been added:

• Detach link from pin by clicking and dragging (configurable via the attribute flag AttributeFlags_EnableLinkDetachWithDragClick)
  

• Links snap to cursor when a modifier is pressed (configurable via IO::link_detach_with_modifier_click.modifier`)
  

• Links can be configured to be created when snapping to the pin, instead of when the left mouse button is released (configurable via AttributeFlags_EnableLinkCreationOnSnap)
  

Fixes

• Fixed #26
• Fixed a bug in detecting when the mouse hovered near a link
• Selecting a link deselects all selected nodes
• Prevent interacting with the canvas when the mouse is not directly over the editor canvas
• Prevent links from snapping to pins of the same type

0.2

New features and breaking changes

• Breaking change: node title bars can now be fully customized as any ImGui content can now be placed between the new BeginNodeTitleBar/EndNodeTitleBar function calls. This change also removes the SetNodeName function.

Calculator icon by DinosoftLabs from Flaticon

• Pins now come in different shapes: circle, quad, and triangle, in both filled and unfilled variants. The desired shape flag is passed as a function argument to BeginInputAttribute/BeginOutputAttribute.

• Pins can now be offset from the node, controlled by the new imnodes::Style::pin_offset value.

• Breaking change: removes StyleFlags_PinOutline and ColorStyle_PinOutline.

• Breaking change: replaces SetNodePos with two functions: SetNodeScreenSpacePos and SetNodeGridSpacePos.

• New editor panning utility functions: EditorContextResetPanningand EditorContextMoveToNode.

• Added a multi-editor example! Check out example/multi_editor.cpp

Fixes

• Selected nodes and links are now only deselected when clicking inside the same node editor window.
• Overlapping node UIs and backgrounds don't glitch out anymore.

A huge thanks to everyone who contributed to imnodes!

0.1 🎉

The basic features of a node editor are now implemented:

• Create nodes, links, and pins in an immediate-mode style
• Use regular dear imgui widgets inside the nodes
• Multiple node and link selection with a box selector
• Nodes, links, and pins are fully customizable, from color style to layout
• The editor canvas can be customized
• Node movement and new link creation handled internally
• The node editor state can be saved and loaded to and from a INI file