Change Details

The workbench crashes if a segmentation tool is active and the workbench is closed. This happens because the `ActiveToolChanged` is called if the active tool changes. The destructor of the Segmentation View is called when the workbench is closed and the tool active tool is deactivated. At that time the render window part is not available anymore and the access to this class instance inside `QmitkSegmentationView::ActiveToolChanged` leads to a crash. To reproduce: 1. open MITK, load an image 2. close the Standard Display, open the MxN Display 3. open the segmentation plugin view and create a new segmentation node 4. activate a tool and close the workbench via "x" A similar problem happens if the render window part is closed ("x" on the Standard Display / MxN Display) and then opened again, all while a tool is activated. Here the problem is the call to `QmitkSegmentationView::ValidateSelectionInput` as a command of the `RenderingManagerViewsInitializedEvent` event.

The workbench crashes if a segmentation tool is active and the workbench is closed. This happens because the `ActiveToolChanged` is called if the active tool changes. The destructor of the Segmentation View is called when the workbench is closed and the tool active tool is deactivated. At that time the render window part is not available anymore and the access to this class instance inside `QmitkSegmentationView::ActiveToolChanged` leads to a crash. To reproduce: 1. open MITK, load an image 2. close the Standard Display, open the MxN Display 3. open the segmentation plugin view and create a new segmentation node 4. activate a tool and close the workbench via "x"

The workbench crashes if a segmentation tool is active and the workbench is closed. This happens because the `ActiveToolChanged` is called if the active tool changes. The destructor of the Segmentation View is called when the workbench is closed and the tool active tool is deactivated. At that time the render window part is not available anymore and the access to this class instance inside `QmitkSegmentationView::ActiveToolChanged` leads to a crash. To reproduce: 1. open MITK, load an image 2. close the Standard Display, open the MxN Display 3. open the segmentation plugin view and create a new segmentation node 4. activate a tool and close the workbench via "x" A similar problem happens if the render window part is closed ("x" on the Standard Display / MxN Display) and then opened again, all while a tool is activated. Here the problem is the call to `QmitkSegmentationView::ValidateSelectionInput` as a command of the `RenderingManagerViewsInitializedEvent` event.