CADViewer Callback Methods

CADViewer has implemented a set of call-back methods when an action has been performed on the canvas or a file has loaded:

General Functional Callback Methods

• cvjs_OnLoadEnd() - callback when a drawing has been loaded

• cvjs_OnLoadEndRedlines() - callback when a redline has been loaded

• cvjs_graphicalObjectOnChange() - callback for any interaction on the canvas. NOTE: used for Redlines, StickyNotes and SpaceObjects

• cvjs_change_space() - callback for change of focus on Space Object

• cvjs_graphicalObjectCreated() - callback for space Object created, use vjs_graphicalObjectOnChange in general case

• cvjs_ObjectSelected() - callback for space Object selected, use vjs_graphicalObjectOnChange in general case

These Java Script callback methods must be implemented as placeholders.

Canvas Interaction Callback Methods

CADViewer provides the ability to add click-handlers to graphical objects in display CAD file. These objects are defined by the Entity Handle in the originating AutoCAD or MicroStation file being displayed by CADViewer. The *Entity Handles are parsed by adding the following conversion control parameter -hlall , see more in the section Conversion Control Parameters and AutoXchange 2023 parameter interface.

          cadviewer.cvjs_conversion_addAXconversionParameter("HLALL", "");		 

These Java Script callback methods should be implemented as placeholders. In the npm based CADViewer GitHub repository samples, these are all implemented as defined callback methods.

• cvjs_dblclick() - CADViewer canvas handler
• cvjs_mouseout() - CADViewer canvas handler
• cvjs_mousedown() - CADViewer canvas handler
• cvjs_click() - CADViewer canvas handler
• cvjs_mouseover() - CADViewer canvas handler
• cvjs_mouseleave() - CADViewer canvas handler
• cvjs_mousenter() - CADViewer canvas handler