C4D HWND

Helper

On 10/04/2013 at 15:14, xxxxxxxx wrote:

Hi C4D Developers!

I have a simple question for you, I wanted to know if there was a simple way to get the main C4D Window Handle (HWND)

for the moment I'm trying to do that by enumerating windows process, and when I find one with the same PID, I look for the Windowclass name with that:
ctypes.windll.user32.RealGetWindowClassW
_
_
and, I only get that:

and because I don't see anything that looks like the HWND...

Edit: I'm working with R13 and R14 on Windows and MacOS

Helper

On 11/04/2013 at 01:50, xxxxxxxx wrote:

Hi,

You can get CINEMA 4D's window handle just by calling GetEditorWindow() (declared in c4d_bitmapfilter.h ).

Helper

On 11/04/2013 at 09:32, xxxxxxxx wrote:

Great, thanks!

but that's a cpp function isn't it?
I can use that in python? Oo

Helper

On 11/04/2013 at 11:49, xxxxxxxx wrote:

ok, I found I can use c/cpp in python with Ctypes, but the problem is I can't find the .so files of the cpp api (that I found here: C:\Program Files\MAXON\CINEMA 4D R13\resource\_api)

is the api already compiled for windows or should I do it myself?

Helper

On 11/04/2013 at 13:32, xxxxxxxx wrote:

There is no dynamic library exposing the complete Cinema 4D API. You
need to compile it on your own.

-Niklas

Helper

On 12/04/2013 at 02:41, xxxxxxxx wrote:

Originally posted by xxxxxxxx

but that's a cpp function isn't it?
I can use that in python? Oo

Sorry, I didn't paid attention your question was related to the Python API.
Why do you need main CINEMA 4D Window Handle?

Helper

On 12/04/2013 at 04:36, xxxxxxxx wrote:

Yannick, could you please elaborate more on how to retrieve the Window handle?
GetEditorWindow() returns an EditorWindow pointer and I don't see how it can be
converted to an HWND. Thanks!

-Niklas

Helper

On 12/04/2013 at 05:30, xxxxxxxx wrote:

Originally posted by xxxxxxxx

Yannick, could you please elaborate more on how to retrieve the Window handle?
GetEditorWindow() returns an EditorWindow pointer and I don't see how it can be
converted to an HWND. Thanks!

Ok, I'll ask the developers to get more information on this.

Helper

On 12/04/2013 at 10:27, xxxxxxxx wrote:

Hi Yannick,

Basicaly, what I do is creating a Plug-in that will create a menu based on information given when c4d starts. those menus will be linked to apps that are supposed to be working with several softwares (maya, nuke, photoshop...)

the thing is that the majority of those apps runs with PySide and opens QtGui.QWidget.

now what I (try to) do is to link those QWidgets to the main c4d window because if I don't, I get an R6025 runtime error...

here is the part of the code from the maya Plug-in that I'm trying to reproduce, if it can help you see what I'm trying to do:

def show_dialog(self, title, bundle, widget_class, *args, **kwargs) :
_
_
_ import maya.OpenMayaUI as OpenMayaUI_
_ from PySide import QtCore, QtGui_
_ import shiboken_
_ _
_ # first construct the widget object _
_ obj = widget_class(*args, **kwargs)_
_
_
_ # now create a dialog to put it inside_
_ ptr = OpenMayaUI.MQtUtil.mainWindow()_
_ parent = shiboken.wrapInstance(long(ptr), QtGui.QMainWindow)_
_ self.log_debug("Parenting dialog to main window %08x %s" % (ptr, parent))_
_ dialog = myqdialog.MyQDialog(title, bundle, obj, parent)_

so what I'd like to make is the ptr = OpenMayaUI.MQtUtil.mainWindow() part.

Hi Nicklas, first of all, thanks for the bad news ^^
I tried to compile the c4d API thanks to what I found in the CINEMA 4D R13\resource\_api_lib folder.

the problem is I can only make a static library. I tried to modify the properties to make a dll instead, but so far, I only get errors during compiling. And I'm beginning to wonder if it is even possible to create a dll ^^'

Ekibyo

Helper

On 15/04/2013 at 01:50, xxxxxxxx wrote:

Originally posted by xxxxxxxx

Yannick, could you please elaborate more on how to retrieve the Window handle?
GetEditorWindow() returns an EditorWindow pointer and I don't see how it can be
converted to an HWND.

You have to cast it into the system specific window handle type. E.g.:

HWND winHandle = (HWND)GetEditorWindow();

Helper

On 15/04/2013 at 02:30, xxxxxxxx wrote:

Originally posted by xxxxxxxx

Basicaly, what I do is creating a Plug-in that will create a menu based on information given when c4d starts. those menus will be linked to apps that are supposed to be working with several softwares (maya, nuke, photoshop...)

the thing is that the majority of those apps runs with PySide and opens QtGui.QWidget.

now what I (try to) do is to link those QWidgets to the main c4d window because if I don't, I get an R6025 runtime error...

here is the part of the code from the maya Plug-in that I'm trying to reproduce, if it can help you see what I'm trying to do:

...

so what I'd like to make is the ptr = OpenMayaUI.MQtUtil.mainWindow() part.

...

Hi Ekibyo,

You'd better use an alternative with the Win32 API functions (like your first solution).
This thread on stackoverflow contains some useful information: http://stackoverflow.com/questions/1888863/how-to-get-main-window-handle-from-process-id

Helper

On 15/04/2013 at 08:26, xxxxxxxx wrote:

@Ekibyo:
First get the Cinema 4D API to compile (not necessarily the cinema4dsdk examples). I haven't yet
tried, but I'm sure there is a way to get all the symbols exported to a DLL in the API. But remember
that Cinema fills a function table containing all SDK functions when your plugin is loaded, and if
Cinema does not call c4d_main() from your DLL, you won't be able to use the exported functions.

@Yannick:
Thanks! I'll check that out.

Helper

On 15/04/2013 at 14:25, xxxxxxxx wrote:

thanks guys, I finally did it.

I found my hwnd using the win32api!

if somebody need to do it, here is how I did it:

use this function to enumerate all process
EnumWindows(EnumWindowsProc(enum_windows_proc), None)

create a function enum_windows_proc that will check if the hwnd given is the same as the c4d one.
if it is, check the class name (RealGetWindowClass(hwnd, buffer, buffer_len))
and make sure it correspond to something like that: C4DR_WIN1_130_0 (C4D version R13)

I got three of them, the last one was the good one!

thank you for your help Yannick, Nicklas.

Helper

On 18/11/2014 at 03:08, xxxxxxxx wrote:

Were you ever able to get the shiboken wrapInstance method to work?

i came up with the following code but cinema freezes when i actually bind a qt widget to the instance returned by wrapInstance...

import ctypes
from Shiboken import *
from PySide import QtGui
GetWindowText = ctypes.windll.user32.GetWindowTextW
GetWindowTextLength = ctypes.windll.user32.GetWindowTextLengthW

def getActiveWindow() :
curW = ctypes.windll.user32.GetForegroundWindow()#getActive window
parW = ctypes.windll.user32.GetWindow(curW,4)#get owner window

length = GetWindowTextLength(parW)
buff = ctypes.create_unicode_buffer(length + 1)

ctypes.windll.user32.GetWindowTextW(parW,buff,length+1)

#print window text just to make sure we're good
print buff.value
return parW

app = QtGui.QApplication.instance()
if not app:app = QtGui.QApplication([])
ptr = getActiveWindow()
parent = shiboken.wrapInstance(ptr, QtGui.QMainWindow)
print parent,ptr
QtGui.QMessageBox.about(parent,'','Hello!!!') #this line cuses the freeze comment it out

any ideas???