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108 lines
3.9 KiB
C++
108 lines
3.9 KiB
C++
/*=========================================================================
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Program: ParaView
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Module: $RCSfile$
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Copyright (c) 2005,2006 Sandia Corporation, Kitware Inc.
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All rights reserved.
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ParaView is a free software; you can redistribute it and/or modify it
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under the terms of the ParaView license version 1.2.
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See License_v1.2.txt for the full ParaView license.
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A copy of this license can be obtained by contacting
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Kitware Inc.
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28 Corporate Drive
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Clifton Park, NY 12065
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USA
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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========================================================================*/
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#ifndef pqTransferFunctionWidget_h
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#define pqTransferFunctionWidget_h
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#include <QWidget>
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#include "pqComponentsModule.h"
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#include "vtkType.h"
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class vtkScalarsToColors;
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class vtkPiecewiseFunction;
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/// pqTransferFunctionWidget provides a widget that can edit the control points
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/// in a vtkPiecewiseFunction or a vtkScalarsToColors (or subclass) or both.
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/// It is used by pqColorOpacityEditorWidget, for example, to show transfer
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/// function editors for color and opacity for a PVLookupTable proxy.
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class PQCOMPONENTS_EXPORT pqTransferFunctionWidget : public QWidget
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{
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Q_OBJECT
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typedef QWidget Superclass;
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public:
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pqTransferFunctionWidget(QWidget* parent=0);
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virtual ~pqTransferFunctionWidget();
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/// Initialize the pqTransferFunctionWidget with the given
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/// color-transfer-function and piecewise-function (either of which can be
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/// null). The editable flags are used to control if the users should be
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/// allowed to edit/change the particular transfer function.
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void initialize(vtkScalarsToColors* stc, bool stc_editable,
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vtkPiecewiseFunction* pwf, bool pwf_editable);
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/// Returns the current point index. -1 is none is selected.
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vtkIdType currentPoint() const;
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/// Returns the number of control points in the editor widget.
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vtkIdType numberOfControlPoints() const;
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public slots:
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/// Set the current point. Set to -1 clear the current point.
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void setCurrentPoint(vtkIdType index);
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/// Set the X-position for the current point (without changing the Y position,
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/// if applicable. We ensure that the point doesn't move past neighbouring
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/// points. Note this will not change the end points i.e. start and end points.
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void setCurrentPointPosition(double xpos);
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/// re-renders the transfer function view. This doesn't render immediately,
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/// schedules a render.
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void render();
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signals:
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/// signal fired when the \c current selected control point changes.
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void currentPointChanged(vtkIdType index);
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/// signal fired to indicate that the control points changed i.e. either they
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/// were moved, orone was added/deleted, or edited to change color, etc.
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void controlPointsModified();
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protected slots:
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/// slot called when the internal vtkControlPointsItem fires
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/// vtkControlPointsItem::CurrentPointChangedEvent
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void onCurrentChangedEvent();
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void renderInternal();
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protected:
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/// callback called when vtkControlPointsItem fires
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/// vtkControlPointsItem::CurrentPointEditEvent.
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void onCurrentPointEditEvent();
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private:
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Q_DISABLE_COPY(pqTransferFunctionWidget)
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class pqInternals;
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pqInternals* Internals;
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};
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#endif
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