[Maya-Python] Getting shape under cursor
Marcus Ottosson
Hi all,
Is it possible to query the shape at the cursor position, without clicking and running cmds.ls(selection=True)?
The idea is to provide a tooltip of sorts, and for that I’ll need to know what to tooltip about, without interrupting the user.
Here’s a rough sketch.
from PySide import QtGui, QtCore
data = {
"lastPosition": QtCore.QPoint(0, 0),
"currentTooltip": None,
"timer": None
}
def tooltip(message):
"""Produce tooltip"""
tooltip = QtGui.QLabel(message)
tooltip.setWindowFlags(QtCore.Qt.ToolTip)
tooltip.setStyleSheet("""
QLabel {
background: "white";
color: "black";
height: 30px;
width: 100px;
padding: 20px;
border: 2px solid black;
}
""")
tooltip.move(QtGui.QCursor.pos())
tooltip.show()
QtCore.QTimer.singleShot(2000, tooltip.deleteLater)
return tooltip
def evaluate():
"""Should we produce a tooltip?"""
position = QtGui.QCursor.pos()
if position == data["lastPosition"]:
object = object_under_cursor()
data["currentTooltip"] = tooltip(
"The object under the cursor is of type \"{}\"".format(
cmds.nodeType(object)))
data["lastPosition"] = position
def object_under_cursor():
"""
I WANT THIS
"""
return "persp"
def start():
"""Track the cursor"""
if data["timer"] is not None:
data["timer"].stop()
timer = QtCore.QTimer()
timer.setInterval(1000)
timer.timeout.connect(evaluate)
timer.start()
# Store reference
data["timer"] = timer
def stop():
if data["timer"] is not None:
data["timer"].stop()
data["timer"] = None
start()
stop()
Aside from some of the logistical issues with how I’m tracking the mouse, how can I implement object_under_cursor?
Justin Israel
Hey Marcus,
I don't know of any way to do what you want through a provided API call. Could you do it in a roundabout way by:
* saving the current selection
* force a click on the mouse position through Qt
* grab selection for use with your tool tips
* restore original selection
It may not cause any visual pops of it is happening really fast. Or if it does, maybe you can try adding a cmds.refresh(suspend=True/False) around it?
Justin
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Justin Israel
Hmm, after a bit more looking around, here is an untested shot in the dark. What if you
* cmds.getPanel(underPointer=True)
* Convert panel to editor using cmds.modelPanel(editor=True)
* cmds.hitTest(modelEditor, x, y) to see if any dag objects are under the mouse. x, y would be the position of the mouse in local space to the model editor widget.
Justin
Marcus Ottosson
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Marcus Ottosson
That worked well, nice find on the seemingly obscure hitTest command.
Significant snippet
def object_under_cursor():
"""Get objects under cursor"""
pos = QtGui.QCursor.pos()
widget = QtGui.qApp.widgetAt(pos)
relpos = widget.mapFromGlobal(pos)
panel = cmds.getPanel(underPointer=True) or ""
if not "modelPanel" in panel:
return
return (cmds.hitTest(panel, relpos.x(), relpos.y()) or [None])[0]
Thanks again!
Justin Israel
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