[vtkusers] KWWidgets: How do you use the vtkKWFileBrowserDialog widget?

[Jason K Wang]

Hello VTK users,

 

I'm a student in desperate need of some assistance. I'm volume rendering
DICOM images and writing an extensive report for a project that I need to
finish in one day. First of all, does anybody know where to find resources
on the use of VTK in clinical practice and any kind of helpful sources which
I can put in my report?

 

Secondly, how do I use the KWWidgets File Browser Dialog widget? 

It is described here:

http://www.kwwidgets.org/doc/nightly/html/classvtkKWFileBrowserDialog.html

 

The below code creates the widget, but, how do I make the file browser
dialog functional so that it selects a DICOM image to read.

 

set dir_browser [vtkKWFileBrowserDialog New]

$dir_browser SetParent [$win GetMainPanelFrame]

$dir_browser Create

pack [$dir_browser GetWidgetName] -side top -anchor nw -expand n -fill x

 

 

I'm asking: which events and commands do I use to link the selection of a
file directory to the DICOM image reader? Any and all help is greatly
appreciated. 

 

I'm using Tcl. The following is my complete pipeline:

 

# Load the KWWidgets package

 

package require kwwidgets

 

# Create the application

# If --test was provided, ignore all registry settings, and exit silently

# Restore the settings that have been saved to the registry, like

# the geometry of the user interface so far.

 

set app [vtkKWApplication New]

$app SetName "3d dicom viewer"

 

# Set a help link. Can be a remote link (URL), or a local file

 

$app SetHelpDialogStartingPage "http://www.kwwidgets.org"

 

# Add a window

# Set 'SupportHelp' to automatically add a menu entry for the help link

 

set win [vtkKWWindow New]

$win SupportHelpOn

$app AddWindow $win

$win Create

$win SecondaryPanelVisibilityOff

 

# Add a render widget, attach it to the view frame, and pack

 

# Create a render widget, 

 

set rw [vtkKWRenderWidget New]

$rw SetParent [$win GetViewFrame]

$rw Create

 

pack [$rw GetWidgetName] -side top -expand y -fill both -padx 0 -pady 0

 

#Create a directory browser, attach it to the main panel frame

 

set dir_browser [vtkKWFileBrowserDialog New]

$dir_browser SetParent [$win GetMainPanelFrame]

$dir_browser Create

pack [$dir_browser GetWidgetName] -side top -anchor nw -expand n -fill x

 

# Create a volume reader

vtkDICOMImageReader v16

v16 SetDirectoryName INSERT FILE DIRECTORY NAME HERE

 

vtkVolumeRayCastCompositeFunction rayCastFunction

 

vtkVolumeRayCastMapper volumeMapper

  volumeMapper SetInput [v16 GetOutput]

  volumeMapper SetVolumeRayCastFunction rayCastFunction

 

# Use the render window and renderer of the renderwidget

 

set vpw_frame [vtkKWFrameWithScrollbar New]

  $vpw_frame SetParent [$win GetMainPanelFrame]

  $vpw_frame Create

 

  pack [$vpw_frame GetWidgetName] -side top -fill both -expand y

    

  # -----------------------------------------------------------------------

 

  # Create a volume property widget

 

  set vpw [vtkKWVolumePropertyWidget New]

  $vpw SetParent [$vpw_frame GetFrame] 

  $vpw Create

  pack [$vpw GetWidgetName] -side top -anchor nw -expand y -padx 2 -pady 2

 

  # Create a volume property and assign it

  # We need color tfuncs opacity and gradient

 

  set vpw_vp [vtkVolumeProperty New]

  $vpw_vp SetIndependentComponents 1

 

  set vpw_cfun [vtkColorTransferFunction New]

  $vpw_cfun SetColorSpaceToRGB

  $vpw_cfun AddRGBPoint 0    0.0 0.0 0.0

  $vpw_cfun AddRGBPoint 500  1.0 0.5 0.3

  $vpw_cfun AddRGBPoint 1000 1.0 0.5 0.3

  $vpw_cfun AddRGBPoint 1150 1.0 1.0 0.9

  $vpw_cfun AddRGBPoint 3150 1.0 1.0 0.9

  #$vpw_cfun AddHSVSegment 0.0 0.2 1.0 1.0 255.0 0.8 1.0 1.0

  #$vpw_cfun AddHSVSegment 80 0.8 1.0 1.0 130.0 0.1 1.0 1.0

 

  set vpw_ofun [vtkPiecewiseFunction New]

  $vpw_ofun AddSegment 0.0 0.2 255.0 0.8

  $vpw_ofun AddSegment 40 0.9 120.0 0.1

  

  set vpw_gfun [vtkPiecewiseFunction New]

  $vpw_gfun AddSegment 0.0 0.2 60.0 0.4

  

  $vpw_vp SetColor 0 $vpw_cfun

  $vpw_vp SetScalarOpacity 0 $vpw_ofun

  $vpw_vp SetGradientOpacity 0 $vpw_gfun

 

  #$vpw SetVolumeProperty volumeProperty

  $vpw SetVolumeProperty $vpw_vp

  $vpw SetWindowLevel 565 565

 

#Create volume

 

vtkVolume volume

  volume SetMapper volumeMapper

 volume SetProperty $vpw_vp

  

#Render volume

 

set ren [$rw GetRenderer]

$ren AddViewProp volume

 

$rw ResetCamera

set camera [$ren GetActiveCamera]

set c [volume GetCenter]

$camera SetFocalPoint [lindex $c 0] [lindex $c 1] [lindex $c 2]

$camera SetPosition [expr [lindex $c 0] + 400] [lindex $c 1] [lindex $c 2]

$camera SetViewUp 0 0 -1

 

#Command linked to volume property widget used in order to update volume
property in real-time

 

$vpw SetVolumePropertyChangedCommand $rw "Render"

$vpw SetVolumePropertyChangingCommand $rw "Render"

 

# Start the application

 

set ret 0

$win Display

$app Start

set ret [$app GetExitStatus]

$win Close

 

# Deallocate and exit

 

$rw Delete

$win Delete

$app Delete

exit $ret

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