Custom Graphics mouse events?

[thomasa88]

Hi, is it possible to get mouse events from Custom Graphics?

I want to react to a user hovering the mouse over or clicking on a custom graphic element (e.g. Mesh or Point).

[kandennti]

Hi @thomasa88 -San.

It is not just custom graphics, but you can do it by using preSelect, preSelectMouseMove, preSelectStart, etc.

https://help.autodesk.com/view/fusion360/ENU/?guid=GUID-0550963a-ff63-4183-b0a7-a1bf0c99f821 

The following sample uses SelectionCommandInput and PreSelectStart and PreSelectEnd to display the minimum and maximum coordinates of the BoundingBox when the mouse cursor hovers over the custom graphic mesh.

# Fusion360API Python script

import traceback
import adsk
import adsk.core as core
import adsk.fusion as fusion

_app: core.Application = None
_ui: core.UserInterface = None
_handlers = []

CMD_INFO = {
    "id": "kantoku_test",
    "name": "test",
    "tooltip": "test"
}

_selIpt: core.SelectionCommandInput = None
_txtIpt: core.TextBoxCommandInput = None


class MyCommandCreatedHandler(core.CommandCreatedEventHandler):
    def __init__(self):
        super().__init__()

    def notify(self, args: core.CommandCreatedEventArgs):
        core.Application.get().log(args.firingEvent.name)
        try:
            global _handlers
            cmd: core.Command = core.Command.cast(args.command)
            cmd.isOKButtonVisible = False

            onDestroy = MyCommandDestroyHandler()
            cmd.destroy.add(onDestroy)
            _handlers.append(onDestroy)

            onPreSelectStart = MyPreSelectStartHandler()
            cmd.preSelectStart.add(onPreSelectStart)
            _handlers.append(onPreSelectStart)

            onPreSelectEnd = MyPreSelectEndHandler()
            cmd.preSelectEnd.add(onPreSelectEnd)
            _handlers.append(onPreSelectEnd)

            inputs: core.CommandInputs = cmd.commandInputs

            global _selIpt
            _selIpt = inputs.addSelectionInput(
                "selIptId",
                "Hover to CustomGraphicsMesh",
                "Hover to CustomGraphicsMesh",
            )
            _selIpt.isVisible = False

            global _txtIpt
            _txtIpt = inputs.addTextBoxCommandInput(
                "txtIpt",
                "CustomGraphicsMesh\n BoundingBox",
                "-",
                4,
                True
            )

        except:
            _ui.messageBox("Failed:\n{}".format(traceback.format_exc()))


class MyPreSelectStartHandler(core.SelectionEventHandler):
    def __init__(self):
        super().__init__()
    def notify(self, args: core.SelectionEventArgs):
        args.isSelectable = False # not working
        if args.selection.entity.classType() == fusion.CustomGraphicsMesh.classType():
            
            cGMesh: fusion.CustomGraphicsMesh = args.selection.entity
            bBox: core.BoundingBox3D = cGMesh.boundingBox

            global _txtIpt
            _txtIpt.text = f"Max{bBox.maxPoint.asArray()}\nMin{bBox.minPoint.asArray()}"


class MyPreSelectEndHandler(core.SelectionEventHandler):
    def __init__(self):
        super().__init__()
    def notify(self, args: core.SelectionEventArgs):
        global _txtIpt
        _txtIpt.text = "-"


class MyCommandDestroyHandler(core.CommandEventHandler):
    def __init__(self):
        super().__init__()

    def notify(self, args: core.CommandEventArgs):
        core.Application.get().log(args.firingEvent.name)
        adsk.terminate()


def run(context):
    try:
        global _app, _ui
        _app = core.Application.get()
        _ui = _app.userInterface

        cmdDef: core.CommandDefinition = _ui.commandDefinitions.itemById(
            CMD_INFO["id"]
        )

        if not cmdDef:
            cmdDef = _ui.commandDefinitions.addButtonDefinition(
                CMD_INFO["id"],
                CMD_INFO["name"],
                CMD_INFO["tooltip"]
            )

        global _handlers
        onCommandCreated = MyCommandCreatedHandler()
        cmdDef.commandCreated.add(onCommandCreated)
        _handlers.append(onCommandCreated)

        cmdDef.execute()

        adsk.autoTerminate(False)

    except:
        if _ui:
            _ui.messageBox("Failed:\n{}".format(traceback.format_exc()))

[thomasa88]

Thank you, kandetti!

I would ideally like to handle mouse events without having to execute a Command, but I might be able to adjust my code.