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host.py
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host.py
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import os
import sys
import inspect
import traceback
import pyblish.api
from . import ipc, settings, _state
from .vendor.Qt import QtWidgets, QtCore, QtGui
MODULE_DIR = os.path.dirname(__file__)
SPLASH_PATH = os.path.join(MODULE_DIR, "splash.png")
def register_dispatch_wrapper(wrapper):
"""Register a dispatch wrapper for servers
The wrapper must have this exact signature:
(func, *args, **kwargs)
"""
signature = inspect.getargspec(wrapper)
if any([len(signature.args) != 1,
signature.varargs is None,
signature.keywords is None]):
raise TypeError("Wrapper signature mismatch")
_state["dispatchWrapper"] = wrapper
def deregister_dispatch_wrapper():
_state.pop("dispatchWrapper")
def dispatch_wrapper():
return _state.get("dispatchWrapper")
def current_server():
return _state.get("currentServer")
def install():
"""Perform first time install
Attributes:
initial_port (int, optional): Port from which to start
looking for available ports, defaults to 9001
"""
if _state.get("installed"):
sys.stdout.write("Already installed, uninstalling..\n")
uninstall()
install_callbacks()
install_host()
_state["installed"] = True
def uninstall():
"""Clean up traces of Pyblish QML"""
uninstall_callbacks()
sys.stdout.write("Pyblish QML shutdown successful.\n")
def show(parent=None):
"""Attempt to show GUI
Requires install() to have been run first, and
a live instance of Pyblish QML in the background.
"""
# Automatically install if not already installed.
if not _state.get("installed"):
install()
# Show existing GUI
if _state.get("currentServer"):
server = _state["currentServer"]
proxy = ipc.server.Proxy(server)
try:
proxy.show(settings.to_dict())
return server
except IOError:
# The running instance has already been closed.
_state.pop("currentServer")
splash = Splash()
splash.show()
def on_shown():
try:
splash.close()
except RuntimeError:
# Splash already closed
pass
pyblish.api.deregister_callback(*callback)
callback = "pyblishQmlShown", on_shown
pyblish.api.register_callback(*callback)
try:
service = ipc.service.Service()
server = ipc.server.Server(service)
except:
# If for some reason, the GUI fails to show.
traceback.print_exc()
return on_shown()
proxy = ipc.server.Proxy(server)
proxy.show(settings.to_dict())
# Store reference to server for future calls
_state["currentServer"] = server
print("Success. QML server available as "
"pyblish_qml.api.current_server()")
return server
def install_callbacks():
pyblish.api.register_callback("instanceToggled", _toggle_instance)
pyblish.api.register_callback("pluginToggled", _toggle_plugin)
def uninstall_callbacks():
pyblish.api.deregister_callback("instanceToggled", _toggle_instance)
pyblish.api.deregister_callback("pluginToggled", _toggle_plugin)
def _toggle_instance(instance, new_value, old_value):
"""Alter instance upon visually toggling it"""
instance.data["publish"] = new_value
def _toggle_plugin(plugin, new_value, old_value):
"""Alter plugin upon visually toggling it"""
plugin.active = new_value
def register_python_executable(path):
"""Expose Python executable to server
The Python executable must be compatible with the
version of PyQt5 installed or provided on the system.
"""
assert os.path.isfile(path), "Must be a file, such as python.exe"
_state["pythonExecutable"] = path
def registered_python_executable():
return _state.get("pythonExecutable")
def register_pyqt5(path):
"""Expose PyQt5 to Python
The exposed PyQt5 must be compatible with the exposed Python.
Arguments:
path (str): Absolute path to directory containing PyQt5
"""
_state["pyqt5"] = path
def install_host():
"""Install required components into supported hosts
An unsupported host will still run, but may encounter issues,
especially with threading.
"""
for install in (_install_maya,
_install_houdini,
_install_nuke,
_install_hiero):
try:
install()
except ImportError:
pass
else:
break
def _install_maya():
"""Helper function to Autodesk Maya support"""
from maya import cmds, utils
def threaded_wrapper(func, *args, **kwargs):
return utils.executeInMainThreadWithResult(
func, *args, **kwargs)
sys.stdout.write("Setting up Pyblish QML in Maya\n")
register_dispatch_wrapper(threaded_wrapper)
def on_application_quit():
try:
_state["currentServer"].popen.kill()
except KeyError:
# No server started
pass
except OSError:
# Already dead
pass
cmds.scriptJob(
event=["quitApplication", on_application_quit],
protected=True
)
# Configure GUI
settings.ContextLabel = "Maya"
settings.WindowTitle = "Pyblish (Maya)"
def _install_houdini():
"""Helper function to SideFx Houdini support"""
import hdefereval
def threaded_wrapper(func, *args, **kwargs):
return hdefereval.executeInMainThreadWithResult(
func, *args, **kwargs)
sys.stdout.write("Setting up Pyblish QML in Houdini\n")
register_dispatch_wrapper(threaded_wrapper)
settings.ContextLabel = "Houdini"
settings.WindowTitle = "Pyblish (Houdini)"
def _install_nuke():
"""Helper function to The Foundry Nuke support"""
import nuke
if "--hiero" in nuke.rawArgs or "--studio" in nuke.rawArgs:
raise ImportError
def threaded_wrapper(func, *args, **kwargs):
return nuke.executeInMainThreadWithResult(
func, args, kwargs)
sys.stdout.write("Setting up Pyblish QML in Nuke\n")
register_dispatch_wrapper(threaded_wrapper)
settings.ContextLabel = "Nuke"
settings.WindowTitle = "Pyblish (Nuke)"
def _install_hiero():
"""Helper function to The Foundry Hiero support"""
import hiero
import nuke
if "--hiero" not in nuke.rawArgs:
raise ImportError
def threaded_wrapper(func, *args, **kwargs):
return hiero.core.executeInMainThreadWithResult(
func, args, kwargs)
sys.stdout.write("Setting up Pyblish QML in Hiero\n")
register_dispatch_wrapper(threaded_wrapper)
settings.ContextLabel = "Hiero"
settings.WindowTitle = "Pyblish (Hiero)"
class Splash(QtWidgets.QWidget):
"""Splash screen for loading QML via subprocess
Loading pyblish-qml may take some time, so when loading
from within an existing interpreter, such as Maya, this
splash screen can keep the user company during that time.
"""
def __init__(self, parent=None):
super(Splash, self).__init__(parent)
self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
self.setAttribute(QtCore.Qt.WA_TranslucentBackground)
self.setWindowFlags(
QtCore.Qt.WindowStaysOnTopHint |
QtCore.Qt.FramelessWindowHint
)
pixmap = QtGui.QPixmap(SPLASH_PATH)
image = QtWidgets.QLabel()
image.setPixmap(pixmap)
layout = QtWidgets.QVBoxLayout(self)
layout.addWidget(image)
label = QtWidgets.QLabel(self)
label.move(20, 170)
label.show()
self.count = 0
self.label = label
self.setStyleSheet("""
QLabel {
color: white
}
""")
loop = QtCore.QTimer()
loop.timeout.connect(self.animate)
loop.start(330)
self.loop = loop
self.animate()
self.resize(200, 200)
def animate(self):
self.label.setText("loading" + "." * self.count)
self.count = (self.count + 1) % 4