Hi! Yes, Marcus is correct, there is a way to achieve this through Qt. Here's my implementation:
- https://docs.brotools.tech/img/animhud_ui.png - https://docs.brotools.tech/AnimationToolbox/animhud.html - https://cdn.discordapp.com/attachments/835229803991924806/920395592734224394/2021-12-14_22-12-23.mp4 this one has blur effect on it (through downsampling) The gist of it is correct, it's just grabbing a screenshot of the underlying 3d view through something like omui.M3dView, cropping it based on widget position and using this image as a background for the widget. But this method has a ton of downsides. One of them is performance, trying to do this every frame or even on every viewport redraw will drop viewport FPS drastically. It can easily bring it from 200 to 20. So you need to think about how to best optimize when and how it updates it's background. Another is that sometimes you can get black background depending on which one of many viewports maya renders is active, for example when opening Hypershade, at least depending on how you get the screenshot. As for redrawing, I made my widget a child of the viewport, and it redraws it's background any time it's own size is changed and at 4FPS. It works for my particular tool, especially since it is designed to take up just a thin line of viewport at the top, but it's unlikely that it will work well for most other tools which need to cover up more of the viewport. On Wednesday, July 20, 2022 at 12:11:41 AM UTC+3 Marcus Ottosson wrote: > Oh hey, I missed this! > > For reference, here's the UI Daniele is referring to. > > - > https://user-images.githubusercontent.com/2152766/145669018-15c6847a-b031-4770-afe3-5a0b0bf50082.mp4 > - https://learn.ragdolldynamics.com/documentation/manipulator/ > > On the one hand, it's totally possible to make a transparent widget that > overlays the viewport. On the other hand, I did not use Qt for this. That > UI is actually rendered with OpenGL and DirectX, directly into the > viewport, as a custom Maya node. The transparent background is a polygon > surface with transparency, rendered very near the camera so as to not clip > with other 3d geometry, and the text is.. textures. Under the hood, it's > drawn with an MPxDrawOverride. > > Now, I mentioned that it is possible to make a transparend widget, but it > does get a bit finicky. MacOS for example doesn't let you do it. For > whatever reason, anything 3d has to appear on-top of any transparent > widget. From what I gather, this is how their window manager is designed. > For Linux and Windows, it's possible, but finicky. Your best bet is making > a full-blown window, but make it borderless. For transparency, your best > bet is physically screencapturing the area underneath the widget, and using > that as a background image to your widget. > > Like I said, finicky. The issue you're having with needing to move and > resize your widget as the viewport changes.. Yes, that is going to be > challenging. Maya doesn't do a good job in letting you interact with the > widget that holds onto the 3d surface, so it's not obvious how to get > notified to changes and what those changes are. > > But it is possible! I had a conversation recently with the BroDynamics > developer who I'll link to this thread in case he's got some things to > share. > > On Tuesday, 29 March 2022 at 14:46:22 UTC+1 Daniele Dolci wrote: > >> Hi All! >> >> I am playing around in Maya trying to achieve a UI similar to the one >> implemented in Ragdoll by Marcus Ottosson. I have a couple of questions. >> The first is probably going to be trivial: How do I make the background of >> this label transparent? I attach below a minimal test to reproduce it: >> [image: Capture.PNG] >> >> ```python >> import shiboken2 >> import sys >> import os >> from maya import cmds >> from maya.api import OpenMayaUI as omui >> from maya.OpenMayaUI import MQtUtil >> >> try: >> from PySide2 import QtCore, QtWidgets, QtGui >> except ImportError: >> from Qt import QtCore, QtWidgets >> >> CSS = """ >> QDialog #View { >> background-color: rgba(0, 0, 0, 0); >> } >> >> QWidget #View { >> background-color: rgba(0, 0, 0, 0); >> } >> >> QLabel { >> color: #eee; >> font-size: 12px; >> background-color: rgba(0, 0, 0, 0); >> } >> """ >> class View(QtWidgets.QDialog): >> >> def __init__(self): >> super(View, self).__init__() >> self._init_window() >> self._init_ui() >> >> def _init_window(self): >> self.setWindowTitle("UI") >> flags = QtCore.Qt.WindowFlags(QtCore.Qt.FramelessWindowHint | >> QtCore.Qt.Dialog) >> self.setWindowFlags(flags) >> panel = cmds.playblast(activeEditor=True) >> self.setAttribute(QtCore.Qt.WA_NoSystemBackground, True) >> self.setAttribute(QtCore.Qt.WA_TranslucentBackground, True) >> self.setAttribute(QtCore.Qt.WA_PaintOnScreen) >> self.setObjectName("View") >> >> # view = omui.M3dView.getM3dViewFromModelEditor(panel) >> view = MQtUtil.findControl(panel) >> self._widget = shiboken2.wrapInstance(long(view), >> QtWidgets.QDialog) >> >> self._widget.setObjectName("View") >> self._widget.setAttribute(QtCore.Qt.WA_NoSystemBackground, True) >> self._widget.setAttribute(QtCore.Qt.WA_TranslucentBackground, >> True) >> self._widget.setAttribute(QtCore.Qt.WA_PaintOnScreen) >> >> def _init_ui(self): >> self._help_lbl = QtWidgets.QLabel("ToolTip", self._widget) >> >> self._help_lbl.move(self._widget.width() - 100, 10) >> >> self._help_lbl.show() >> >> self._help_lbl.setStyleSheet(CSS) >> >> def update(self, *args, **kwargs): >> super(View, self).update(*args, **kwargs) >> self._setup_btn.move(250, 1000) >> self._create_btn.move(200, 1000) >> self._build_btn.move(300, 1000) >> self._optimize_btn.move(1400, 1000) >> self._help_lbl.move(self._widget.width() - 100, 10) >> >> >> View() >> ``` >> >> the second question is, what would be the best way to have the widget to >> be drawn again when the user change the size of the UI, when he switches >> from attribute editor to channel box etc? Please see attached gif: >> >> [image: ui.gif] >> > -- You received this message because you are subscribed to the Google Groups "Python Programming for Autodesk Maya" group. To unsubscribe from this group and stop receiving emails from it, send an email to python_inside_maya+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/python_inside_maya/cf7df97d-8aae-418b-a33d-ffe6a5e8809bn%40googlegroups.com.
