Documentation/4.1/Developers/DisplayableManagers - Revision history

UpdateBot: Prepend documentation/versioncheck template. See http://na-mic.org/Mantis/view.php?id=2887

2013-06-14T07:25:23Z

Prepend documentation/versioncheck template. See http://na-mic.org/Mantis/view.php?id=2887

Finetjul at 16:25, 15 October 2012

2012-10-15T16:25:05Z

Finetjul: Created page with '=Displayable Managers= To be written. =How a view is refreshed= It's the 3D view (ctkVTKAbstractView) that controls WHEN the vtkRenderWindow::Render is called. There are 2 ways …'

2012-04-20T18:12:36Z

Created page with '=Displayable Managers= To be written. =How a view is refreshed= It's the 3D view (ctkVTKAbstractView) that controls WHEN the vtkRenderWindow::Render is called. There are 2 ways …'

New page

=Displayable Managers=
To be written.

=How a view is refreshed=
It's the 3D view (ctkVTKAbstractView) that controls WHEN the vtkRenderWindow::Render is called.
There are 2 ways to tell the view to re-render:
#<code>vtkRenderWindowInteractor::Render()</code> is called (by <code>vtkInteractorStyle</code> when the mouse is moved or by some vtkWidgets that call it internally). The request is blocked and <code>ctkAbstractView::scheduleRender()</code> is called on the view.
#or it is done by the <code>vtkMRMLDisplayableManager</code>s (e.g. <code>vtkMRMLVolumeRenderingDisplayableManager</code>) by the RequestRender() calls. They call vtkMRMLDisplayableManagerGroup::RequestRender() which fires a vtkCommand::UpdateEvent. The Qt view (e.g. <code>qMRMLThreeDView</code>) observes the <code>UpdateEvent</code> and calls <code>ctkVTKAbstractView::scheduleRender()</code>.

The CTK view compacts the render requests and ensure the FPS (<code>vtkRenderWindow::GetDesiredUpdateRate()</code>) is respected.
<pre>
vtkInteractorStyle ---------------------------\
vtkWidget -------------------------------------> vtkRenderWindowInteractor::Render() ------------------------------\
vtkMRML???DisplayableManager::RequestRender() -> vtkMRML???DisplayableManagerGroup::RequestRender() -> UpdateEvent -> ctkVTKAbstractView::scheduleRender()
</pre>

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