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##Copyright 2023 Thomas Paviot (tpaviot@gmail.com)

##

##This file is part of pythonOCC.

##

##pythonOCC is free software: you can redistribute it and/or modify

##it under the terms of the GNU Lesser General Public License as published by

##the Free Software Foundation, either version 3 of the License, or

##(at your option) any later version.

##

##pythonOCC is distributed in the hope that it will be useful,

##but WITHOUT ANY WARRANTY; without even the implied warranty of

##MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

##GNU Lesser General Public License for more details.

##

##You should have received a copy of the GNU Lesser General Public License

##along with pythonOCC. If not, see <http://www.gnu.org/licenses/>.

import tkinter as tk

from OCC.Display import OCCViewer

class tkViewer3d(tk.Frame):

def __init__(self, parent, default=""):

tk.Frame.__init__(self, parent, width=1024, height=768)

self.bind("<Map>", self.Map)

self.bind("<Configure>", self.Resize)

self.bind("<B1-Motion>", self.Rotate)

self.bind("<Button-1>", self.LeftDown)

self.bind("<B2-Motion>", self.Pan)

self.bind("<Button-2>", self.LeftDown)

# zoom

self.bind("<MouseWheel>", self.Zoom) # windows

self.bind("<Button-4>", self.Zoom) # Linux

self.bind("<Button-5>", self.Zoom) # Linux

self._display = None

self._inited = False

self.drag_pos_y = self.drag_pos_x = 0

def LeftDown(self, event):

self.drag_pos_x = event.x

self.drag_pos_y = event.y

self._display.StartRotation(self.drag_pos_x, self.drag_pos_y)

def Rotate(self, event):

self._display.Rotation(event.x, event.y)

def Pan(self, event):

dx = event.x - self.drag_pos_x

dy = event.y - self.drag_pos_y

self.drag_pos_x = event.x

self.drag_pos_y = event.y

self._display.Pan(dx, -dy)

def Zoom(self, event):

# Linux

if event.num == 4: # zoom in

zoom_factor = 2.0

elif event.num == 5: # zoom out

zoom_factor = 0.5

# Windows

if event.delta < 0: # zoom out

zoom_factor = 1/1.2

elif event.delta > 0: # zoom in

zoom_factor = 1.2

self._display.ZoomFactor(zoom_factor)

def Resize(self, event):

if self._inited:

self._display.Repaint()

def Map(self, event):

if not self._inited:

self._display = OCCViewer.Viewer3d()

self._display.Create(window_handle=self.winfo_id(), parent=self)

self._display.SetModeShaded()

self._inited = True