Intégration de FreeCADGui

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Revision as of 20:28, 23 September 2014 by Renatorivo (talk | contribs) (Created page with "Tout d'abord, obtenir la fenêtre principale via '''PyQt''' :")

Vous savez déjà que vous pouvez importer le module FreeCAD dans une application Python, et d'utiliser tous les outils de l'application hôte. Mais l'interface utilisateur FreeCAD (GUI) peut également être importée en tant que module Python. Normalement, vous pouvez importer l'interface complète dans son ensemble, et non pas des portions de celui-ci. C'est parce que le système d'interface FreeCAD n'est pas seulement faite de widgets indépendants, et, de barres d'outils, mais, cette interface est une construction complexe, où plusieurs composantes invisibles (tels que le système de sélection, etc) sont nécessaires à la vue 3D, pour pouvoir fonctionner.

Mais, avec un peu de "hacking", il est possible d'importer toute l'interface de FreeCAD, alors déplacez la vue 3D de FreeCAD dans votre propre application Qt.

Nous vous montrons ici, 3 méthodes différentes.

En utilisant directement le widget vue 3D de FreeCAD

Soyez conscient qu'il y a d'énormes problèmes dans cette approche. La gestion des événements Qt ne semble pas fonctionner (pourquoi ?? aucune idée !), et, si vous utilisez la vue 3D, du menu contextuel, l'application se bloque. Une meilleure façon serait de créer votre propre vue 3D SoQtExaminerViewer ou SoQtViewer et "pousser" le contenu de la vue 3d de FreeCAD dans votre code, comme indiqué dans les sections ci-dessous.

Tout d'abord, obtenir la fenêtre principale via PyQt :

    from PyQt4 import QtGui
    from PyQt4 import QtCore
       
    def getMainWindow():
       toplevel = QtGui.qApp.topLevelWidgets()
       for i in toplevel:
          if i.metaObject().className() == "Gui::MainWindow":
             return i
       raise Exception("No main window found")
 
    mw=getMainWindow()

Then get the View3DInventor view the same way:

    def get3dview(mw):
          childs=mw.findChildren(QtGui.QMainWindow)
          for i in childs:
             if i.metaObject().className()=="Gui::View3DInventor":
                return i
          return None
 
    v=get3dview(mw)

The following code is generated automatically, by creating a Ui-file with QtDesigner, and converting it to python code with the pyuic tool:

    # -*- coding: utf-8 -*-
 
    # Form implementation generated from reading ui file 'mainwindow.ui'
    #
    # Created: Sun Dec 27 11:18:56 2009
    #      by: PyQt4 UI code generator 4.6
    #
    # WARNING! All changes made in this file will be lost!
 
    from PyQt4 import QtCore, QtGui
 
    class Ui_MainWindow(object):
        def setupUi(self, MainWindow):
            MainWindow.setObjectName("MainWindow")
            MainWindow.resize(508, 436)
            self.centralwidget = QtGui.QWidget(MainWindow)
            self.centralwidget.setObjectName("centralwidget")
            self.gridLayout = QtGui.QGridLayout(self.centralwidget)
            self.gridLayout.setObjectName("gridLayout")
            self.mdiArea = QtGui.QMdiArea(self.centralwidget)
            self.mdiArea.setViewMode(QtGui.QMdiArea.TabbedView)
            self.mdiArea.setTabPosition(QtGui.QTabWidget.South)
            self.mdiArea.setObjectName("mdiArea")
            self.gridLayout.addWidget(self.mdiArea, 0, 0, 1, 1)
            MainWindow.setCentralWidget(self.centralwidget)
            self.menubar = QtGui.QMenuBar(MainWindow)
            self.menubar.setGeometry(QtCore.QRect(0, 0, 508, 27))
            self.menubar.setObjectName("menubar")
            MainWindow.setMenuBar(self.menubar)
            self.statusbar = QtGui.QStatusBar(MainWindow)
            self.statusbar.setObjectName("statusbar")
            MainWindow.setStatusBar(self.statusbar)
 
            self.retranslateUi(MainWindow)
            QtCore.QMetaObject.connectSlotsByName(MainWindow)
 
        def retranslateUi(self, MainWindow):
            MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))

Then, create a main window that should be your application's main window, apply the UI setup above to it in order to add an MDI area and "move" our 3d view to it

    ui=Ui_MainWindow()
    my_mw=QtGui.QMainWindow()
    ui.setupUi(my_mw)
    ui.mdiArea.addSubWindow(v)
    my_mw.show()

Creating a soGui Examiner Viewer

Alternatively, you can also use the FreeCADGui module to extract a coin/openInventor representation of the objects of your scene, then use that coin data in an external viewer (your application). Here is an easy way to get the 3d representation of an object:

    FreeCAD.activeDocument().addObject("Part::Box","myBox")
    s=FreeCADGui.activeDocument().getObject("myBox").toString() # store as string
    from pivy import coin
    inp.setBuffer(s)
    myNode=coin.SoDB.readAll(inp) # restore from string

Then, create a standalone viewer with pivy:

  from pivy.sogui import *
  from pivy.coin import *
  import sys
 
  def myViewer():
      # Initialize Coin. This returns a main window to use.
      # If unsuccessful, exit.
      myWindow = SoGui.init(sys.argv[0])
      if myWindow == None: sys.exit(1)
  
      # Make an empty scene and add our node to it
      scene = SoSeparator()
      scene.addChild(myNode)
 
      # Create a viewer in which to see our scene graph.
      viewer = SoGuiExaminerViewer(myWindow)
 
      # Put our scene into viewer, change the title
      viewer.setSceneGraph(scene)
      viewer.setTitle("FreeCAD Object Viewer")
      viewer.show()
 
      SoGui.show(myWindow) # Display main window
      SoGui.mainLoop()     # Main Coin event loop

Then you just need to run your viewer:

      myViewer()

Using the quarter module

Instead of using the sogui viewer, you can also use the more modern quarter module. This is probably the best solution of the 3.

    #!/usr/bin/env python
 
    ###
    # Copyright (c) 2002-2008 Kongsberg SIM
    #
    # Permission to use, copy, modify, and distribute this software for any
    # purpose with or without fee is hereby granted, provided that the above
    # copyright notice and this permission notice appear in all copies.
    #
    # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
    # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
    # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
    #
 
    import os
    import sys
 
    from PyQt4 import QtCore, QtGui
    from PyQt4.QtGui import QMainWindow, QWorkspace, QAction, QFileDialog, QApplication
 
    from pivy.coin import SoInput, SoDB
    from pivy.quarter import QuarterWidget
 
    import FreeCAD, FreeCADGui
 
    def getMainWindow():
       toplevel = QtGui.qApp.topLevelWidgets()
       for i in toplevel:
          if i.metaObject().className() == "Gui::MainWindow":
             return i
       raise Exception("No main window found")
 
    class MdiQuarterWidget(QuarterWidget):
        def __init__(self, parent, sharewidget):
            QuarterWidget.__init__(self, parent=parent, sharewidget=sharewidget)
 
        def loadFile(self, filename):
            in_ = SoInput()
            if (in_.openFile(str(filename.toLatin1()))):
                root = SoDB.readAll(in_)
            if (root):
                self.setSceneGraph(root)
                self.currentfile = filename
                self.setWindowTitle(filename)
                return True
            return False
 
        def currentFile(self):
            return self.currentfile
 
        def minimumSizeHint(self):
            return QtCore.QSize(640, 480)
 
    class MdiMainWindow(QMainWindow):
        def __init__(self, qApp):
            QMainWindow.__init__(self)
            self._firstwidget = None
            self._workspace = QWorkspace()
            self.setCentralWidget(self._workspace)
            self.setAcceptDrops(True)
            self.setWindowTitle("Pivy Quarter MDI example")
 
            filemenu = self.menuBar().addMenu("&File")
            windowmenu = self.menuBar().addMenu("&Windows")
 
            fileopenaction = QAction("&Create Box", self)
            fileexitaction = QAction("E&xit", self)
            tileaction = QAction("Tile", self)
            cascadeaction = QAction("Cascade", self)
 
            filemenu.addAction(fileopenaction)
            filemenu.addAction(fileexitaction)
            windowmenu.addAction(tileaction)
            windowmenu.addAction(cascadeaction)
 
            self.connect(fileopenaction, QtCore.SIGNAL("triggered()"), self.createBoxInFreeCAD)
            self.connect(fileexitaction, QtCore.SIGNAL("triggered()"), QtGui.qApp.closeAllWindows)
            self.connect(tileaction, QtCore.SIGNAL("triggered()"), self._workspace.tile)
            self.connect(cascadeaction, QtCore.SIGNAL("triggered()"), self._workspace.cascade)
 
            windowmapper = QtCore.QSignalMapper(self)
            self.connect(windowmapper, QtCore.SIGNAL("mapped(QWidget *)"), self._workspace.setActiveWindow)
 
            self.dirname = os.curdir       
 
        def dragEnterEvent(self, event):
            # just accept anything...
            event.acceptProposedAction()
 
        def dropEvent(self, event):
            mimedata = event.mimeData()
            if mimedata.hasUrls():
                path = mimedata.urls().takeFirst().path()
                self.open_path(path)
 
        def closeEvent(self, event):
            self._workspace.closeAllWindows()
 
        def open(self):
            self.open_path(QFileDialog.getOpenFileName(self, "", self.dirname))
 
        def open_path(self, filename):
            self.dirname = os.path.dirname(str(filename.toLatin1()))
            if not filename.isEmpty():
                existing = self.findMdiChild(filename)
                if existing:
                    self._workspace.setActiveWindow(existing)
                    return
            child = self.createMdiChild()
            if (child.loadFile(filename)):
                self.statusBar().showMessage("File loaded", 2000)
                child.show()
            else:
                child.close()
 
        def findMdiChild(self, filename):
            canonicalpath = QtCore.QFileInfo(filename).canonicalFilePath()
            for window in self._workspace.windowList():
                mdiwidget = window
                if mdiwidget.currentFile() == canonicalpath:
                    return mdiwidget
            return 0;
 
        def createMdiChild(self):
            widget = MdiQuarterWidget(None, self._firstwidget)
            self._workspace.addWindow(widget)
            if not self._firstwidget:
                self._firstwidget = widget
            return widget
 
        def createBoxInFreeCAD(self):
            widget = MdiQuarterWidget(None, self._firstwidget)
            self._workspace.addWindow(widget)
            if not self._firstwidget:
                self._firstwidget = widget
            widget.show()
            doc = FreeCAD.newDocument()
            doc.addObject("Part::Box","myBox")
            iv_=FreeCADGui.getDocument(doc.Name).getObject("myBox").toString()
            in_ = SoInput()
            in_.setBuffer(iv_)
            root = SoDB.readAll(in_)
            if (root):
                widget.setSceneGraph(root)
 
    def main():
        app = QApplication(sys.argv)
 
        mdi = MdiMainWindow(app)   
        mdi.show()
        FreeCADGui.showMainWindow() # setup the GUI stuff of FreeCAD
        mw=getMainWindow()
        mw.hide() # hide all
        if len(sys.argv)==2:
            mdi.open_path(QtCore.QString(sys.argv[1]))
        sys.exit(app.exec_())
 
    def show():
        mdi = MdiMainWindow(QtGui.qApp)   
        mdi.show()
        mw=getMainWindow()
        #mw.hide() # hide all
 
    if __name__ == '__main__':
        main()

Without even firing up the FreeCAD Gui

Starting from FreeCAD rev2760, it is now possible to obtain the coin representation of any FreeCAD object without opening the main window. This makes it extremely easy to implement your own viewer and transparently have FreeCAD updating it. After importing the FreeCADGui module, you need to fire it up with the setupWithoutGUI() method, after which you can use all of FreeCAD's view providers to obtain coin/openInventor nodes.

    import os, sys, FreeCAD, FreeCADGui
    from PyQt4 import QtCore, QtGui
    from PyQt4.QtGui import QMainWindow, QWorkspace, QAction, QFileDialog, QApplication
    from pivy.coin import SoInput, SoDB, sogui
 
    class MdiMainWindow(QMainWindow):
        def __init__(self, qApp):
            QMainWindow.__init__(self)
            self._firstwidget = None
            self._workspace = QWorkspace()
            self.setCentralWidget(self._workspace)
            self.setAcceptDrops(True)
            self.setWindowTitle("Pivy Quarter MDI example")
            self.viewers=[]
 
            filemenu = self.menuBar().addMenu("&File")
            windowmenu = self.menuBar().addMenu("&Windows")
 
            fileopenaction = QAction("&Create Box", self)
            fileexitaction = QAction("E&xit", self)
            tileaction = QAction("Tile", self)
            cascadeaction = QAction("Cascade", self)
 
            filemenu.addAction(fileopenaction)
            filemenu.addAction(fileexitaction)
            windowmenu.addAction(tileaction)
            windowmenu.addAction(cascadeaction)
 
            self.connect(fileopenaction, QtCore.SIGNAL("triggered()"), self.createBoxInFreeCAD)
            self.connect(fileexitaction, QtCore.SIGNAL("triggered()"), QtGui.qApp.closeAllWindows)
            self.connect(tileaction, QtCore.SIGNAL("triggered()"), self._workspace.tile)
            self.connect(cascadeaction, QtCore.SIGNAL("triggered()"), self._workspace.cascade)
 
            windowmapper = QtCore.QSignalMapper(self)
            self.connect(windowmapper, QtCore.SIGNAL("mapped(QWidget *)"), self._workspace.setActiveWindow)
 
        def closeEvent(self, event):
            self._workspace.closeAllWindows()
 
        def createBoxInFreeCAD(self):
            widget = QtGui.QWidget(self._firstwidget)
            viewer = sogui.SoGuiExaminerViewer(widget)
            self._workspace.addWindow(widget)
            if not self._firstwidget:
                self._firstwidget = widget
            widget.show()
            self.viewers.append(viewer)
            doc = FreeCAD.newDocument()
            obj=doc.addObject("Part::Box","myBox")
            doc.recompute()
            root=FreeCADGui.subgraphFromObject(obj)
            viewer.setSceneGraph(root)
 
    def main():
        app = QApplication(sys.argv)
        mdi = MdiMainWindow(app)   
        mdi.show()
        FreeCADGui.setupWithoutGUI()
        sys.exit(app.exec_())
 
    if __name__ == '__main__':
        main()

Or, if using pivy's sogui module doesn't work for you (the sogui module is becoming obsoleted and the coin developers are now favoring the new quarter library, which has much better interaction with qt), this is the same script but with using quarter:

    #!/usr/bin/env python
 
    import os
    import sys
 
    from PyQt4 import QtCore, QtGui
    from PyQt4.QtGui import QMainWindow, QWorkspace, QAction, QApplication
 
    from pivy.coin import SoInput, SoDB
    from pivy.quarter import QuarterWidget
    import FreeCADGui
 
 
    class MdiQuarterWidget(QuarterWidget):
        def __init__(self, parent, sharewidget):
            QuarterWidget.__init__(self, parent=parent, sharewidget=sharewidget)
 
        def minimumSizeHint(self):
            return QtCore.QSize(640, 480)
 
 
    class MdiMainWindow(QMainWindow):
        def __init__(self, qApp):
            QMainWindow.__init__(self)
            self._firstwidget = None
            self._workspace = QWorkspace()
            self.setCentralWidget(self._workspace)
            self.setAcceptDrops(True)
            self.setWindowTitle("Pivy Quarter MDI example")
 
            filemenu = self.menuBar().addMenu("&File")
            windowmenu = self.menuBar().addMenu("&Windows")
 
            fileopenaction = QAction("&Create Box", self)
            fileexitaction = QAction("E&xit", self)
            tileaction = QAction("Tile", self)
            cascadeaction = QAction("Cascade", self)
 
            filemenu.addAction(fileopenaction)
            filemenu.addAction(fileexitaction)
            windowmenu.addAction(tileaction)
            windowmenu.addAction(cascadeaction)
 
            self.connect(fileopenaction, QtCore.SIGNAL("triggered()"), self.createBoxInFreeCAD)
            self.connect(fileexitaction, QtCore.SIGNAL("triggered()"), QtGui.qApp.closeAllWindows)
            self.connect(tileaction, QtCore.SIGNAL("triggered()"), self._workspace.tile)
            self.connect(cascadeaction, QtCore.SIGNAL("triggered()"), self._workspace.cascade)
 
            windowmapper = QtCore.QSignalMapper(self)
            self.connect(windowmapper, QtCore.SIGNAL("mapped(QWidget *)"), self._workspace.setActiveWindow)
 
            self.dirname = os.curdir       
 
        def closeEvent(self, event):
            self._workspace.closeAllWindows()
 
        def createBoxInFreeCAD(self):
            d=FreeCAD.newDocument()
            o=d.addObject("Part::Box")
            d.recompute()
            s=FreeCADGui.subgraphFromObject(o)
            child = self.createMdiChild()
            child.show()
            child.setSceneGraph(s)
 
        def createMdiChild(self):
            widget = MdiQuarterWidget(None, self._firstwidget)
            self._workspace.addWindow(widget)
            if not self._firstwidget:
                self._firstwidget = widget
            return widget
 
 
    def main():
        FreeCADGui.setupWithoutGUI()
        app = QApplication(sys.argv)
        mdi = MdiMainWindow(app)   
        mdi.show()
        sys.exit(app.exec_())
 
 
    if __name__ == '__main__':
        main()