/usr/share/pyshared/vtk/tk/vtkTkImageViewerWidget.py is in python-vtk 5.8.0-14.1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 | """
A vtkTkImageViewerWidget for python, which is based on the
vtkTkImageWindowWidget.
Specify double=1 to get a double-buffered window.
Created by David Gobbi, Nov 1999
"""
import Tkinter
import math, os, sys
import vtk
from vtkLoadPythonTkWidgets import vtkLoadPythonTkWidgets
class vtkTkImageViewerWidget(Tkinter.Widget):
"""
A vtkTkImageViewerWidget for Python.
Use GetImageViewer() to get the vtkImageViewer.
Create with the keyword double=1 in order to generate a
double-buffered viewer.
Create with the keyword focus_on_enter=1 to enable
focus-follows-mouse. The default is for a click-to-focus mode.
"""
def __init__(self, master, cnf={}, **kw):
"""
Constructor.
Keyword arguments:
iv -- Use passed image viewer instead of creating a new one.
double -- If True, generate a double-buffered viewer.
Defaults to False.
focus_on_enter -- If True, use a focus-follows-mouse mode.
Defaults to False where the widget will use a click-to-focus
mode.
"""
# load the necessary extensions into tk
vtkLoadPythonTkWidgets(master.tk)
try: # use specified vtkImageViewer
imageViewer = kw['iv']
except KeyError: # or create one if none specified
imageViewer = vtk.vtkImageViewer()
doubleBuffer = 0
try:
if kw['double']:
doubleBuffer = 1
del kw['double']
except:
pass
# check if focus should follow mouse
if kw.get('focus_on_enter'):
self._FocusOnEnter = 1
del kw['focus_on_enter']
else:
self._FocusOnEnter = 0
kw['iv'] = imageViewer.GetAddressAsString("vtkImageViewer")
Tkinter.Widget.__init__(self, master, 'vtkTkImageViewerWidget',
cnf, kw)
if doubleBuffer:
imageViewer.GetRenderWindow().DoubleBufferOn()
self.BindTkImageViewer()
def __getattr__(self,attr):
# because the tk part of vtkTkImageViewerWidget must have
# the only remaining reference to the ImageViewer when
# it is destroyed, we can't actually store the ImageViewer
# as an attribute but instead have to get it from the tk-side
if attr == '_ImageViewer':
addr = self.tk.call(self._w, 'GetImageViewer')[5:]
return vtk.vtkImageViewer('_%s_vtkImageViewer_p' % addr)
raise AttributeError, self.__class__.__name__ + \
" has no attribute named " + attr
def GetImageViewer(self):
return self._ImageViewer
def Render(self):
self._ImageViewer.Render()
def BindTkImageViewer(self):
imager = self._ImageViewer.GetRenderer()
# stuff for window level text.
mapper = vtk.vtkTextMapper()
mapper.SetInput("none")
t_prop = mapper.GetTextProperty()
t_prop.SetFontFamilyToTimes()
t_prop.SetFontSize(18)
t_prop.BoldOn()
t_prop.ShadowOn()
self._LevelMapper = mapper
actor = vtk.vtkActor2D()
actor.SetMapper(mapper)
actor.SetLayerNumber(1)
actor.GetPositionCoordinate().SetValue(4,22)
actor.GetProperty().SetColor(1,1,0.5)
actor.SetVisibility(0)
imager.AddActor2D(actor)
self._LevelActor = actor
mapper = vtk.vtkTextMapper()
mapper.SetInput("none")
t_prop = mapper.GetTextProperty()
t_prop.SetFontFamilyToTimes()
t_prop.SetFontSize(18)
t_prop.BoldOn()
t_prop.ShadowOn()
self._WindowMapper = mapper
actor = vtk.vtkActor2D()
actor.SetMapper(mapper)
actor.SetLayerNumber(1)
actor.GetPositionCoordinate().SetValue(4,4)
actor.GetProperty().SetColor(1,1,0.5)
actor.SetVisibility(0)
imager.AddActor2D(actor)
self._WindowActor = actor
self._LastX = 0
self._LastY = 0
self._OldFocus = 0
self._InExpose = 0
# bindings
# window level
self.bind("<ButtonPress-1>",
lambda e,s=self: s.StartWindowLevelInteraction(e.x,e.y))
self.bind("<B1-Motion>",
lambda e,s=self: s.UpdateWindowLevelInteraction(e.x,e.y))
self.bind("<ButtonRelease-1>",
lambda e,s=self: s.EndWindowLevelInteraction())
# Get the value
self.bind("<ButtonPress-3>",
lambda e,s=self: s.StartQueryInteraction(e.x,e.y))
self.bind("<B3-Motion>",
lambda e,s=self: s.UpdateQueryInteraction(e.x,e.y))
self.bind("<ButtonRelease-3>",
lambda e,s=self: s.EndQueryInteraction())
self.bind("<Expose>",
lambda e,s=self: s.ExposeTkImageViewer())
self.bind("<Enter>",
lambda e,s=self: s.EnterTkViewer())
self.bind("<Leave>",
lambda e,s=self: s.LeaveTkViewer())
self.bind("<KeyPress-e>",
lambda e,s=self: s.quit())
self.bind("<KeyPress-r>",
lambda e,s=self: s.ResetTkImageViewer())
def GetImageViewer(self):
return self._ImageViewer
def Render(self):
self._ImageViewer.Render()
def _GrabFocus(self):
self._OldFocus=self.focus_get()
self.focus()
def EnterTkViewer(self):
if self._FocusOnEnter:
self._GrabFocus()
def LeaveTkViewer(self):
if self._FocusOnEnter and (self._OldFocus != None):
self._OldFocus.focus()
def ExposeTkImageViewer(self):
if (self._InExpose == 0):
self._InExpose = 1
if (not self._ImageViewer.GetRenderWindow().
IsA('vtkCocoaRenderWindow')):
self.update()
self._ImageViewer.Render()
self._InExpose = 0
def StartWindowLevelInteraction(self,x,y):
if not self._FocusOnEnter:
self._GrabFocus()
viewer = self._ImageViewer
self._LastX = x
self._LastY = y
self._Window = float(viewer.GetColorWindow())
self._Level = float(viewer.GetColorLevel())
# make the window level text visible
self._LevelActor.SetVisibility(1)
self._WindowActor.SetVisibility(1)
self.UpdateWindowLevelInteraction(x,y)
def EndWindowLevelInteraction(self):
# make the window level text invisible
self._LevelActor.SetVisibility(0)
self._WindowActor.SetVisibility(0)
self.Render()
def UpdateWindowLevelInteraction(self,x,y):
# compute normalized delta
dx = 4.0*(x - self._LastX)/self.winfo_width()*self._Window
dy = 4.0*(self._LastY - y)/self.winfo_height()*self._Level
# abs so that direction does not flip
if (self._Window < 0.0):
dx = -dx
if (self._Level < 0.0):
dy = -dy
# compute new window level
window = self._Window + dx
if (window < 0.0):
level = self._Level + dy
else:
level = self._Level - dy
viewer = self._ImageViewer
viewer.SetColorWindow(window)
viewer.SetColorLevel(level)
self._WindowMapper.SetInput("Window: %g" % window)
self._LevelMapper.SetInput("Level: %g" % level)
self.Render()
def ResetTkImageViewer(self):
# Reset: Set window level to show all values
viewer = self._ImageViewer
input = viewer.GetInput()
if (input == None):
return
# Get the extent in viewer
z = viewer.GetZSlice()
input.SetUpdateExtent(-99999,99999,-99999,99999,z,z)
input.Update()
(low,high) = input.GetScalarRange()
viewer.SetColorWindow(high - low)
viewer.SetColorLevel((high + low) * 0.5)
self.Render()
def StartQueryInteraction(self,x,y):
if not self._FocusOnEnter:
self._GrabFocus()
# Query PixleValue stuff
self._WindowActor.SetVisibility(1)
self.UpdateQueryInteraction(x,y)
def EndQueryInteraction(self):
self._WindowActor.SetVisibility(0)
self.Render()
def UpdateQueryInteraction(self,x,y):
viewer = self._ImageViewer
input = viewer.GetInput()
z = viewer.GetZSlice()
# y is flipped upside down
y = self.winfo_height() - y
# make sure point is in the whole extent of the image.
(xMin,xMax,yMin,yMax,zMin,zMax) = input.GetWholeExtent()
if (x < xMin or x > xMax or y < yMin or \
y > yMax or z < zMin or z > zMax):
return
input.SetUpdateExtent(x,x,y,y,z,z)
input.Update()
numComps = input.GetNumberOfScalarComponents()
text = ""
for i in xrange(numComps):
val = input.GetScalarComponentAsDouble(x,y,z,i)
text = "%s %.1f" % (text,val)
self._WindowMapper.SetInput("(%d, %d): %s" % (x,y,text))
self.Render()
#-----------------------------------------------------------------------------
# an example of how to use this widget
if __name__ == "__main__":
canvas = vtk.vtkImageCanvasSource2D()
canvas.SetNumberOfScalarComponents(3)
canvas.SetScalarType(3)
canvas.SetExtent(0,511,0,511,0,0)
canvas.SetDrawColor(100,100,0)
canvas.FillBox(0,511,0,511)
canvas.SetDrawColor(200,0,200)
canvas.FillBox(32,511,100,500)
canvas.SetDrawColor(100,0,0)
canvas.FillTube(550,20,30,400,5)
canvas.SetDrawColor(255,255,255)
canvas.DrawSegment3D(10,20,0,90,510,0)
canvas.SetDrawColor(200,50,50)
canvas.DrawSegment3D(510,90,0,10,20,0)
# Check segment clipping
canvas.SetDrawColor(0,200,0)
canvas.DrawSegment(-10,30,30,-10)
canvas.DrawSegment(-10,481,30,521)
canvas.DrawSegment(481,-10,521,30)
canvas.DrawSegment(481,521,521,481)
# Check Filling a triangle
canvas.SetDrawColor(20,200,200)
canvas.FillTriangle(-100,100,190,150,40,300)
# Check drawing a circle
canvas.SetDrawColor(250,250,10)
canvas.DrawCircle(350,350,200.0)
# Check drawing a point
canvas.SetDrawColor(250,250,250)
canvas.DrawPoint(350,350)
canvas.DrawPoint(350,550)
# Test filling functionality
canvas.SetDrawColor(55,0,0)
canvas.DrawCircle(450,350,80.0)
canvas.SetDrawColor(100,255,100)
canvas.FillPixel(450,350)
# Create the GUI: two renderer widgets and a quit button
frame = Tkinter.Frame()
widget = vtkTkImageViewerWidget(frame,width=512,height=512,double=1)
viewer = widget.GetImageViewer()
viewer.SetInput(canvas.GetOutput())
viewer.SetColorWindow(256)
viewer.SetColorLevel(127.5)
button = Tkinter.Button(frame,text="Quit",command=frame.quit)
widget.pack(side='top',padx=3,pady=3,fill='both',expand='t')
frame.pack(fill='both',expand='t')
button.pack(fill='x')
frame.mainloop()
|