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269 lines
9.1 KiB
269 lines
9.1 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkPointWidget.h,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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// .NAME vtkPointWidget - position a point in 3D space
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// .SECTION Description
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// This 3D widget allows the user to position a point in 3D space using a 3D
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// cursor. The cursor has an outline bounding box, axes-aligned cross-hairs,
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// and axes shadows. (The outline and shadows can be turned off.) Any of
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// these can be turned off. A nice feature of the object is that the
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// vtkPointWidget, like any 3D widget, will work with the current interactor
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// style. That is, if vtkPointWidget does not handle an event, then all other
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// registered observers (including the interactor style) have an opportunity
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// to process the event. Otherwise, the vtkPointWidget will terminate the
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// processing of the event that it handles.
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//
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// To use this object, just invoke SetInteractor() with the argument of the
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// method a vtkRenderWindowInteractor. You may also wish to invoke
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// "PlaceWidget()" to initially position the widget. The interactor will act
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// normally until the "i" key (for "interactor") is pressed, at which point
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// the vtkPointWidget will appear. (See superclass documentation for
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// information about changing this behavior.) To move the point, the user can
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// grab (left mouse) on any widget line and "slide" the point into
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// position. Scaling is achieved by using the right mouse button "up" the
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// render window (makes the widget bigger) or "down" the render window (makes
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// the widget smaller). To translate the widget use the middle mouse button.
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// (Note: all of the translation interactions can be constrained to one of
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// the x-y-z axes by using the "shift" key.) The vtkPointWidget produces as
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// output a polydata with a single point and a vertex cell.
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//
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// Some additional features of this class include the ability to control the
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// rendered properties of the widget. You can set the properties of the
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// selected and unselected representations of the parts of the widget. For
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// example, you can set the property of the 3D cursor in its normal and
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// selected states.
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// .SECTION Caveats
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// Note that widget can be picked even when it is "behind" other actors.
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// This is an intended feature and not a bug.
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//
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// The constrained translation/sliding action (i.e., when the "shift" key is
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// depressed) along the axes is based on a combination of a "hot" spot around
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// the cursor focus plus the initial mouse motion after selection. That is,
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// if the user selects an axis outside of the hot spot, then the motion is
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// constrained along that axis. If the user selects the point widget near the
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// focus (within the hot spot), the initial motion defines a vector which is
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// compared to the x-y-z axes. The motion is constrained to the axis that is
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// most parallel to the initial motion vector.
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//
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// .SECTION See Also
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// vtk3DWidget vtkLineWidget vtkBoxWidget vtkPlaneWidget
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#ifndef __vtkPointWidget_h
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#define __vtkPointWidget_h
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#include "vtk3DWidget.h"
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#include "vtkCursor3D.h" // Needed for faster access to the Cursor3D
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class vtkActor;
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class vtkPolyDataMapper;
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class vtkCellPicker;
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class vtkPolyData;
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class vtkProperty;
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class VTK_WIDGETS_EXPORT vtkPointWidget : public vtk3DWidget
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{
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public:
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// Description:
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// Instantiate this widget
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static vtkPointWidget *New();
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vtkTypeRevisionMacro(vtkPointWidget,vtk3DWidget);
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void PrintSelf(ostream& os, vtkIndent indent);
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// Description:
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// Methods that satisfy the superclass' API.
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virtual void SetEnabled(int);
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virtual void PlaceWidget(double bounds[6]);
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void PlaceWidget()
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{this->Superclass::PlaceWidget();}
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void PlaceWidget(double xmin, double xmax, double ymin, double ymax,
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double zmin, double zmax)
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{this->Superclass::PlaceWidget(xmin,xmax,ymin,ymax,zmin,zmax);}
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// Description:
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// Grab the polydata (including points) that defines the point. A
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// single point and a vertex compose the vtkPolyData.
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void GetPolyData(vtkPolyData *pd);
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// Description:
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// Set/Get the position of the point. Note that if the position is set
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// outside of the bounding box, it will be clamped to the boundary of
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// the bounding box.
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void SetPosition(double x, double y, double z)
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{this->Cursor3D->SetFocalPoint(x,y,z);}
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void SetPosition(double x[3])
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{this->SetPosition(x[0],x[1],x[2]);}
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double* GetPosition()
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{return this->Cursor3D->GetFocalPoint();}
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void GetPosition(double xyz[3])
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{this->Cursor3D->GetFocalPoint(xyz);}
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// Description:
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// Turn on/off the wireframe bounding box.
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void SetOutline(int o)
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{this->Cursor3D->SetOutline(o);}
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int GetOutline()
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{return this->Cursor3D->GetOutline();}
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void OutlineOn()
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{this->Cursor3D->OutlineOn();}
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void OutlineOff()
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{this->Cursor3D->OutlineOff();}
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// Description:
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// Turn on/off the wireframe x-shadows.
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void SetXShadows(int o)
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{this->Cursor3D->SetXShadows(o);}
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int GetXShadows()
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{return this->Cursor3D->GetXShadows();}
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void XShadowsOn()
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{this->Cursor3D->XShadowsOn();}
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void XShadowsOff()
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{this->Cursor3D->XShadowsOff();}
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// Description:
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// Turn on/off the wireframe y-shadows.
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void SetYShadows(int o)
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{this->Cursor3D->SetYShadows(o);}
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int GetYShadows()
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{return this->Cursor3D->GetYShadows();}
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void YShadowsOn()
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{this->Cursor3D->YShadowsOn();}
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void YShadowsOff()
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{this->Cursor3D->YShadowsOff();}
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// Description:
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// Turn on/off the wireframe z-shadows.
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void SetZShadows(int o)
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{this->Cursor3D->SetZShadows(o);}
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int GetZShadows()
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{return this->Cursor3D->GetZShadows();}
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void ZShadowsOn()
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{this->Cursor3D->ZShadowsOn();}
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void ZShadowsOff()
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{this->Cursor3D->ZShadowsOff();}
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// Description:
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// If translation mode is on, as the widget is moved the bounding box,
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// shadows, and cursor are all translated simultaneously as the point
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// moves.
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void SetTranslationMode(int mode)
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{ this->Cursor3D->SetTranslationMode(mode); this->Cursor3D->Update(); }
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int GetTranslationMode()
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{ return this->Cursor3D->GetTranslationMode(); }
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void TranslationModeOn()
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{ this->SetTranslationMode(1); }
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void TranslationModeOff()
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{ this->SetTranslationMode(0); }
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// Description:
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// Convenience methods to turn outline and shadows on and off.
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void AllOn()
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{
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this->OutlineOn();
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this->XShadowsOn();
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this->YShadowsOn();
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this->ZShadowsOn();
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}
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void AllOff()
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{
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this->OutlineOff();
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this->XShadowsOff();
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this->YShadowsOff();
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this->ZShadowsOff();
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}
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// Description:
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// Get the handle properties (the little balls are the handles). The
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// properties of the handles when selected and normal can be
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// set.
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vtkGetObjectMacro(Property,vtkProperty);
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vtkGetObjectMacro(SelectedProperty,vtkProperty);
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// Description:
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// Set the "hot spot" size; i.e., the region around the focus, in which the
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// motion vector is used to control the constrained sliding action. Note the
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// size is specified as a fraction of the length of the diagonal of the
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// point widget's bounding box.
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vtkSetClampMacro(HotSpotSize,double,0.0,1.0);
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vtkGetMacro(HotSpotSize,double);
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protected:
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vtkPointWidget();
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~vtkPointWidget();
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//BTX - manage the state of the widget
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friend class vtkLineWidget;
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int State;
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enum WidgetState
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{
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Start=0,
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Moving,
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Scaling,
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Translating,
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Outside
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};
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//ETX
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// Handles the events
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static void ProcessEvents(vtkObject* object,
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unsigned long event,
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void* clientdata,
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void* calldata);
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// ProcessEvents() dispatches to these methods.
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virtual void OnMouseMove();
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virtual void OnLeftButtonDown();
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virtual void OnLeftButtonUp();
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virtual void OnMiddleButtonDown();
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virtual void OnMiddleButtonUp();
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virtual void OnRightButtonDown();
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virtual void OnRightButtonUp();
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// the cursor3D
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vtkActor *Actor;
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vtkPolyDataMapper *Mapper;
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vtkCursor3D *Cursor3D;
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void Highlight(int highlight);
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// Do the picking
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vtkCellPicker *CursorPicker;
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// Methods to manipulate the cursor
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int ConstraintAxis;
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void Translate(double *p1, double *p2);
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void Scale(double *p1, double *p2, int X, int Y);
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void MoveFocus(double *p1, double *p2);
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int TranslationMode;
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// Properties used to control the appearance of selected objects and
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// the manipulator in general.
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vtkProperty *Property;
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vtkProperty *SelectedProperty;
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void CreateDefaultProperties();
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// The size of the hot spot.
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double HotSpotSize;
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int DetermineConstraintAxis(int constraint, double *x);
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int WaitingForMotion;
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int WaitCount;
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private:
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vtkPointWidget(const vtkPointWidget&); //Not implemented
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void operator=(const vtkPointWidget&); //Not implemented
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};
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#endif
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