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// ************************************************************************* //
//                             avtLevelsLegend.C                             //
// ************************************************************************* //

#include <avtLevelsLegend.h>

#include <math.h>
#include <snprintf.h>

#include <vtkLookupTable.h>
#include <vtkVisItScalarBarActor.h>
#include <DebugStream.h>

// ****************************************************************************
//  Method: avtLevelsLegend constructor
//
//  Programmer:  Kathleen Bonnell 
//  Creation:    March 1, 2001 
//
//  Modifications:
//
//    Kathleen Bonnell, Mon Sep 24 16:02:31 PDT 2001
//    Intialize lut to NULL.
//
//    Hank Childs, Thu Mar 14 15:58:51 PST 2002 
//    Make legend smaller.
//
//    Kathleen Bonnell, Mon Apr 29 13:37:14 PDT 2002  
//    Initialize varName. 
//
//    Eric Brugger, Mon Jul 14 15:53:07 PDT 2003
//    Remove member varName.
//
//    Eric Brugger, Wed Jul 16 08:07:17 PDT 2003
//    I added nLevels, barVisibility and rangeVisibility.  I changed the
//    default size and position of the legend.
//
//    Brad Whitlock, Wed Mar 21 21:43:27 PST 2007
//    Added scale.
//
//    Mark C. Miller, Thu Nov 15 16:13:12 PST 2007
//    Moved call to SetLegendPosition() to bottom of constructor. Without this
//    we can wind up invoking methods on the object we are constructing here
//    before all its state variables have been initialized.
//
//    Hank Childs, Fri Jan 23 15:43:43 PST 2009
//    Initialize minmaxVisibility.
//
// ****************************************************************************

avtLevelsLegend::avtLevelsLegend()
{
    min = 0.;
    max = 1.;
    scale[0] = scale[1] = 1.;
    maxScale = 1.;
    setMaxScale = true;

    nLevels = 0;

    lut = NULL;

    sBar = vtkVisItScalarBarActor::New();
    sBar->SetShadow(0);
    sBar->SetType(vtkVisItScalarBarActor::VTK_DISCRETE);

    size[0] = 0.08;
    size[1] = 0.26;
    sBar->SetPosition2(size[0], size[1]);

    barVisibility = true;
    rangeVisibility = true;
    labelVisibility = 1;
    minmaxVisibility = true;
    titleVisibility = true;

    //
    // Set the legend to also point to sBar, so the base methods will work
    // without us re-defining them.
    //
    legend = sBar;
    legend->Register(NULL);

    //
    // WARNING: DO NOT INITIALIZE avtLevelsLegend STATE VARIABLES BELOW HERE
    // WARNING: DO NOT INITIALIZE avtLevelsLegend STATE VARIABLES BELOW HERE
    // WARNING: DO NOT INITIALIZE avtLevelsLegend STATE VARIABLES BELOW HERE
    // See note of Thu Nov 15 16:13:12 PST 2007 above.
    //
    SetLegendPosition(0.05, 0.72);
}


// ****************************************************************************
//  Method: avtLevelsLegend destructor
//
//  Programmer: Kathleen Bonnell 
//  Creation:   March 1, 2001 
//
//  Modifications:
//    Kathleen Bonnell, Mon Sep 24 16:02:31 PDT 2001
//    Delete lut.
//
//    Kathleen Bonnell, Mon Apr 29 13:37:14 PDT 2002  
//    Delete varName. 
//
//    Eric Brugger, Mon Jul 14 15:53:07 PDT 2003
//    Remove member varName.
//
// ****************************************************************************

avtLevelsLegend::~avtLevelsLegend()
{
    if (sBar != NULL)
    {
        sBar->Delete();
        sBar = NULL;
    }
    if (lut != NULL)
    {
        lut->Delete();
        lut = NULL;
    }
}


// ****************************************************************************
//  Method: avtLevelsLegend::GetLegendSize
//
//  Purpose:
//      Gets the legend's size.
//
//  Arguments:
//      w        The legend's width.
//      h        The legend's height.
//
//  Programmer:  Eric Brugger
//  Creation:    July 15, 2003
//
//  Modifications:
//    Eric Brugger, Thu Jul 17 08:20:28 PDT 2003
//    Added maxSize argument.
//
//    Brad Whitlock, Wed Mar 21 21:41:53 PST 2007
//    Added scaling.
//
//    Hank Childs, Wed May 30 11:32:47 PDT 2007
//    Increase fudge factor (contours of 3 isolevels weren't showing up)
//
//    Dave Bremer, Mon Oct 13 12:36:09 PDT 2008
//    Changed computed size depending on whether the bar is vertical 
//    or horizontal.
//
//    Hank Childs, Fri Jan 23 15:55:45 PST 2009
//    Add support for user setting the range visibility.
//
// ****************************************************************************

void
avtLevelsLegend::GetLegendSize(double maxHeight, double &w, double &h)
{
    if (orientation == VerticalTextOnRight ||
        orientation == VerticalTextOnLeft) 
    {
        w = 0.08 * scale[0];
    
        //
        // The fudge factor added to nLines when barVisibility is true is
        // there to make sure that there is enough room for all the levels
        // because this algorithm doesn't exactly match the algorithm in
        // vtkVisItScalarBarActor.
        //
        double fudge = 0.7;
        double nLines = 0.0;
        if (title != NULL)        nLines += 1.0;
        if (databaseInfo != NULL) nLines += 2.0;
        if (varName != NULL)      nLines += 1.0;
        if (message != NULL)      nLines += 1.0;
        if (rangeVisibility && minmaxVisibility)      nLines += 2.0;
        if (barVisibility)        nLines += nLevels * 1.1 + 1.0 + fudge;
    
        h = nLines * fontHeight * scale[1];
    
        //
        // If the legend is larger than the maximum size, then try to shrink
        // the color bar so that it fits within the maximum size.
        //
        if (h > maxHeight && barVisibility)
        {
            double hTitles = h - (nLevels * 1.1 + 1.0 + fudge) * fontHeight;
            double nLevelsSpace = (maxHeight - hTitles) / (fontHeight * 1.1);
            if (nLevelsSpace > 2.)
            {
                h = maxHeight;
            }
        }
    
        if(setMaxScale)
            maxScale = maxHeight;
    }
    else
    {
        double nLines = 0.0;
        if (title != NULL)        nLines += 1.0;
        if (databaseInfo != NULL) nLines += 2.0;
        if (varName != NULL)      nLines += 1.0;
        if (message != NULL)      nLines += 1.0;
        if (rangeVisibility && minmaxVisibility)      nLines += 2.0;
        if (barVisibility)        nLines += 4.0;  //Let the height of the horz bar be 2x font height (?)

        h = nLines * fontHeight * scale[1];

        //Leaving enough space in the width is tricky.  Ideally, we'd like enough space to 
        //create text for each level, and the text width varies greatly.
        w = nLevels * 0.05 * scale[0];
        if (w > 1.0)
            w = 1.0;

    }

    size[0] = w;
    size[1] = h;
}

// ****************************************************************************
// Method: avtLevelsLegend::SetTitleVisibility
//
// Purpose: 
//   Sets whether titles are visible.
//
// Arguments:
//   val : True if titles are to be visible.
//
// Programmer: Brad Whitlock
// Creation:   Wed Mar 21 21:31:17 PST 2007
//
// Modifications:
//   
// ****************************************************************************

void
avtLevelsLegend::SetTitleVisibility(bool val)
{
    titleVisibility = val;
    sBar->SetTitleVisibility(val?1:0);
}

// ****************************************************************************
// Method: avtLevelsLegend::GetTitleVisibility
//
// Purpose: 
//   Returns whether titles are visible.
//
// Returns:    Whether titles are visible.
//
// Programmer: Brad Whitlock
// Creation:   Wed Mar 21 21:31:48 PST 2007
//
// Modifications:
//   
// ****************************************************************************

bool
avtLevelsLegend::GetTitleVisibility() const
{
    return titleVisibility;
}

// ****************************************************************************
// Method: avtLevelsLegend::SetLabelVisibility
//
// Purpose: 
//   Sets whether labels are visible.
//
// Arguments:
//   val : True if labels are to be visible.
//
// Programmer: Brad Whitlock
// Creation:   Wed Mar 21 21:31:17 PST 2007
//
// Modifications:
//    Kathleen Bonnell, Thu Oct  1 14:26:46 PDT 2009
//    LabelVisibility has been changed to DrawMode in sbar.
//   
// ****************************************************************************

void
avtLevelsLegend::SetLabelVisibility(int val)
{
    labelVisibility = val;
    sBar->SetDrawMode((vtkVisItScalarBarActor::TickLabelDrawMode)val);
}

// ****************************************************************************
// Method: avtLevelsLegend::GetLabelVisibility
//
// Purpose: 
//   Returns whether labels are visible.
//
// Returns:    Whether labels are visible.
//
// Programmer: Brad Whitlock
// Creation:   Wed Mar 21 21:31:48 PST 2007
//
// Modifications:
//   
// ****************************************************************************

int
avtLevelsLegend::GetLabelVisibility() const
{
    return labelVisibility;
}

// ****************************************************************************
// Method: avtLevelsLegend::SetMinMaxVisibility
//
// Purpose: 
//   Sets whether min/max is visible.
//
// Arguments:
//   val : True if min/max is to be visible.
//
// Programmer: Hank Childs
// Creation:   January 23, 2009
//
// Modifications:
//   
// ****************************************************************************

void
avtLevelsLegend::SetMinMaxVisibility(bool val)
{
    minmaxVisibility = val;
    sBar->SetRangeVisibility(minmaxVisibility && rangeVisibility);
}

// ****************************************************************************
// Method: avtLevelsLegend::GetMinMaxVisibility
//
// Purpose: 
//   Returns whether min/max is visible.
//
// Returns:    Whether min/max is visible.
//
// Programmer: Hank Childs
// Creation:   January 23, 2009
//
// Modifications:
//   
// ****************************************************************************

bool
avtLevelsLegend::GetMinMaxVisibility() const
{
    return minmaxVisibility;
}

// ****************************************************************************
// Method: avtLevelsLegend::SetLegendScale
//
// Purpose: 
//   Set the legend scale.
//
// Arguments:
//   xScale : The scale factor in X.
//   yScale : The scale factor in Y.
//
// Programmer: Brad Whitlock
// Creation:   Wed Mar 21 21:33:20 PST 2007
//
// Modifications:
//   
// ****************************************************************************

void
avtLevelsLegend::SetLegendScale(double xScale, double yScale)
{
    // Scale the color bar
    double colorBarScale = sBar->GetBarWidth() / scale[0];
    colorBarScale *= xScale;
    sBar->SetBarWidth(colorBarScale);

    // Save the scales.
    scale[0] = xScale;
    scale[1] = yScale;
}

// ****************************************************************************
// Method: avtLevelsLegend::SetBoundingBoxVisibility
//
// Purpose: 
//   Sets whether the bounding box around the legend will be visible.
//
// Arguments:
//   val : True to make the box visible.
//
// Programmer: Brad Whitlock
// Creation:   Wed Mar 21 21:34:03 PST 2007
//
// Modifications:
//   
// ****************************************************************************

void
avtLevelsLegend::SetBoundingBoxVisibility(bool val)
{
    sBar->SetBoundingBoxVisibility(val);
}

// ****************************************************************************
// Method: avtLevelsLegend::SetBoundingBoxColor
//
// Purpose: 
//   Set the bounding box color.
//
// Arguments:
//   color : An rgba tuple of colors.
//
// Programmer: Brad Whitlock
// Creation:   Wed Mar 21 21:34:36 PST 2007
//
// Modifications:
//   
// ****************************************************************************

void
avtLevelsLegend::SetBoundingBoxColor(const double *color)
{
    sBar->SetBoundingBoxColor((double*)color);
}

// ****************************************************************************
// Method: avtLevelsLegend::SetOrientation
//
// Purpose: 
//   Set the orientation of the legend -- allowing for horizontal, vertical, ...
//
// Programmer: Brad Whitlock
// Creation:   Wed Mar 21 21:34:59 PST 2007
//
// Modifications:
//   Dave Bremer, Mon Oct 13 12:36:09 PDT 2008
//   Implemented this placeholder method. 
// ****************************************************************************

void
avtLevelsLegend::SetOrientation(LegendOrientation l)
{
    avtLegend::SetOrientation(l);
    sBar->SetOrientation((vtkVisItScalarBarActor::BarOrientation)(int)l);
}

// ****************************************************************************
// Method: avtLevelsLegend::SetFont
//
// Purpose: 
//   Set the font properties for the legend.
//
// Arguments:
//   family : VTK_ARIAL, VTK_COURIER, VTK_TIMES
//   bold   : True to make the text bold.
//   italic : True to make the text italic.
//   shadow : True to make the text shadowed.
//
// Programmer: Brad Whitlock
// Creation:   Wed Mar 21 21:35:31 PST 2007
//
// Modifications:
//   
// ****************************************************************************

void
avtLevelsLegend::SetFont(int family, bool bold, bool italic, bool shadow)
{
    sBar->SetFontFamily(family);
    sBar->SetBold(bold?1:0);
    sBar->SetItalic(italic?1:0);
    sBar->SetShadow(shadow?1:0);
}

// ****************************************************************************
//  Method: avtLevelsLegend::SetColorBarVisibility
//
//  Purpose:
//      Turns on/off the visibility of the color bar. 
//
//  Arguments:
//      val    On (1) or Off (0).
//
//  Programmer: Kathleen Bonnell 
//  Creation:   March 2, 2001 
//
//  Modifications:
//    Eric Brugger, Wed Jul 16 08:07:17 PDT 2003
//    Add code to track the color bar visibility.
//
// ****************************************************************************

void
avtLevelsLegend::SetColorBarVisibility(const bool val)
{
    barVisibility = val;
    sBar->SetColorBarVisibility(val);
}


// ****************************************************************************
//  Method: avtLevelsLegend::SetRange
//
//  Purpose:
//      Sets the range of the scalar bars.
//
//  Arguments:
//      nmin    The new minimum.
//      nmax    The new maximum.
//
//  Programmer: Kathleen Bonnell 
//  Creation:   March 1, 2001 
//
// ****************************************************************************

void
avtLevelsLegend::SetRange(double nmin, double nmax)
{
    min = nmin;
    max = nmax;
    sBar->SetRange(min, max);
}


// ****************************************************************************
//  Method: avtLevelsLegend::SetLevels
//
//  Purpose:
//      Sets the levels for the scalar bars.
//
//  Arguments:
//      levels  The levels to use.
//
//  Programmer: Kathleen Bonnell 
//  Creation:   March 1, 2001 
//
//  Modifications:
//    Eric Brugger, Wed Jul 16 08:07:17 PDT 2003
//    Add code to track the number of levels.
//
// ****************************************************************************

void
avtLevelsLegend::SetLevels(const std::vector<double> &levels)
{
    nLevels = (int)levels.size();
    sBar->SetDefinedLabels(levels);
}


// ****************************************************************************
//  Method: avtLevelsLegend::SetLevels
//
//  Purpose:
//      Sets the levels for the scalar bars.
//
//  Arguments:
//      levels  The levels to use.
//
//  Programmer: Kathleen Bonnell 
//  Creation:   March 1, 2001 
//
//  Modifications:
//    Eric Brugger, Wed Jul 16 08:07:17 PDT 2003
//    Add code to track the number of levels.
//
// ****************************************************************************

void
avtLevelsLegend::SetLevels(const std::vector<std::string> &levels)
{
    nLevels = (int)levels.size();
    sBar->SetDefinedLabels(levels);
}


// ****************************************************************************
//  Method: avtLevelsLegend::SetLookupTable
//
//  Purpose:
//      Sets the lookup table for the scalar bars.
//
//  Arguments:
//      lut    The lookup table to use.
//
//  Programmer: Kathleen Bonnell 
//  Creation:   March 1, 2001 
//
//  Modifications: 
//  
//    Kathleen Bonnell, Mon Sep 24 16:02:31 PDT 2001
//    Copy LUT over to new member lut, register it and set its range.
//
// ****************************************************************************

void
avtLevelsLegend::SetLookupTable(vtkLookupTable *LUT) 
{
    if (lut == LUT)
    {
        return;
    }
    if (lut != NULL)
    {
        lut->Delete();
    }
    lut = LUT;
    lut->Register(NULL);
    lut->SetTableRange(0, lut->GetNumberOfColors()); 
    sBar->SetLookupTable(lut);
}


// ****************************************************************************
//  Method: avtLevelsLegend::SetLabelColorMap
//
//  Purpose:
//    Sets the label-to-colorindex map for sBar.   
//
//  Arguments:
//    cm       The new color map.
//
//  Programmer: Kathleen Bonnell 
//  Creation:   September 10, 2002 
//
//  Modifications:
//    Brad Whitlock, Fri Nov 15 10:13:59 PDT 2002
//    I changed the map type.
//
// ****************************************************************************
void
avtLevelsLegend::SetLabelColorMap(const LevelColorMap &cm)
{
    sBar->SetLabelColorMap(cm);
}


// ****************************************************************************
//  Method: avtLevelsLegend::SetReverseOrder
//
//  Purpose:
//    Sets the reverse-ordering of sBar.   
//    Default is for the legend to be drawn bottom-to-top, min-to-max.
//    Reverse allows for labels and colors to be drawn top-to-bottom.
//
//  Arguments:
//    rev       The new order. 
//
//  Programmer: Kathleen Bonnell 
//  Creation:   May 19, 2003 
//
//  Modifications:
//
// ****************************************************************************

void
avtLevelsLegend::SetReverseOrder(const bool rev)
{
    if (rev)
        sBar->ReverseOrderOn();
     else
        sBar->ReverseOrderOff();
}


// ****************************************************************************
//  Method: avtLevelsLegend::SetVarRangeVisibility
//
//  Purpose:
//      Turns on/off the visibility of the variable range.
//
//  Arguments:
//      val     The new value (On 1, Off 0).
//
//  Programmer: Kathleen Bonnell
//  Creation:   March 1, 2001
//
//  Modifications:
//    Eric Brugger, Wed Jul 16 08:07:17 PDT 2003
//    Add code to track the number of levels.
//
// ****************************************************************************

void
avtLevelsLegend::SetVarRangeVisibility(const bool val )
{
    rangeVisibility = val;
    sBar->SetRangeVisibility(rangeVisibility && minmaxVisibility);
}


// ****************************************************************************
//  Method: avtLevelsLegend::SetVarRange
//
//  Purpose:
//      Sets the var range to be displayed as limits text. 
//
//  Arguments:
//      nmin    The new minimum.
//      nmax    The new maximum.
//
//  Programmer: Kathleen Bonnell 
//  Creation:   April 2, 2001 
//
// ****************************************************************************

void
avtLevelsLegend::SetVarRange(double nmin, double nmax)
{
    sBar->SetVarRange(nmin, nmax);
}


// ****************************************************************************
//  Method: avtLevelsLegend::ChangePosition
//
//  Purpose:
//      Because the base type doesn't know what kind of 2D actor we have used,
//      this is the hook that allows it to do the bookkeeping and the derived
//      type to do the actual work of changing the legend's position.
//
//  Arguments:
//      x       The new x-position.
//      y       The new y-position.
//
//  Programmer: Kathleen Bonnell 
//  Creation:   March 1, 2001 
//
//  Modifications:
//    Brad Whitlock, Wed Mar 21 21:46:36 PST 2007
//    Set position2.
//
// ****************************************************************************

void
avtLevelsLegend::ChangePosition(double x, double y)
{
    sBar->GetPositionCoordinate()->SetCoordinateSystemToNormalizedViewport();
    sBar->GetPositionCoordinate()->SetValue(x, y, 0.);

    // Set the position 2, incorporating the scale.
    double w, h;
    setMaxScale = false;
    GetLegendSize(maxScale, w, h);
    setMaxScale = true;
    sBar->SetPosition2(w, h); 
}


// ****************************************************************************
//  Method: avtLevelsLegend::ChangeTitle
//
//  Purpose:
//      Because the base type doesn't know what kind of 2D actor we have used,
//      this is the hook that allows it to do the bookkeeping and the derived
//      type to do the actual work of changing the legend's title.
//
//  Arguments:
//      t       The new title.
//
//  Programmer: Kathleen Bonnell 
//  Creation:   October 25, 2005 
// 
//  Modifications:
//
// ****************************************************************************

void
avtLevelsLegend::ChangeTitle(const char *t)
{
    sBar->SetTitle(t);
}


// ****************************************************************************
//  Method: avtLevelsLegend::ChangeFontHeight
//
//  Purpose:
//      Because the base type doesn't know what kind of 2D actor we have used,
//      this is the hook that allows it to do the bookkeeping and the derived
//      type to do the actual work of changing the legend's font height.
//
//  Arguments:
//      fh      The new font height.
//
//  Programmer: Kathleen Bonnell 
//  Creation:   October 25, 2005 
// 
//  Modifications:
//    Brad Whitlock, Wed Mar 21 20:19:59 PST 2007
//    Scale the text taking scale into account.
//
// ****************************************************************************

void
avtLevelsLegend::ChangeFontHeight(double fh)
{
    double minScale = (scale[0] < scale[1]) ? scale[0] : scale[1];
    sBar->SetFontHeight(fh * minScale);
}


// ****************************************************************************
// Method: avtLevelsLegend::SetNumberFormat
//
// Purpose: 
//   Sets the number format string.
//
// Arguments:
//   fmt : The new format string.
//
// Programmer: Dave Bremer
// Creation:   Mon Oct 13 12:02:41 PDT 2008
//
// Modifications:
//   
//    Hank Childs, Fri Jan 23 16:33:32 PST 2009
//    Also set the range format.
//
// ****************************************************************************

void
avtLevelsLegend::SetNumberFormat(const char *fmt)
{
    // Set the label format.
    sBar->SetLabelFormat(fmt);

    // Use the format in the min/max range label.
    char rangeFormat[200];
    SNPRINTF(rangeFormat, 200, "Max: %s\nMin: %s", fmt, fmt);
    sBar->SetRangeFormat(rangeFormat);
}

// ****************************************************************************
// Method: avtLevelsLegend::SetUseSuppliedLabels
//
// Programmer: Kathleen Bonnell
// Creation:   Wed Sep 16 13:25:54 PDT 2009
//
// Modifications:
//   
// ****************************************************************************

void
avtLevelsLegend::SetUseSuppliedLabels(bool val)
{
    sBar->SetUseSuppliedLabels(val);
}


// ****************************************************************************
// Method: avtLevelsLegend::GetUseSuppliedLabels
//
// Programmer: Kathleen Bonnell
// Creation:   Wed Sep 16 13:25:54 PDT 2009
//
// Modifications:
//   
// ****************************************************************************

bool
avtLevelsLegend::GetUseSuppliedLabels()
{
    return sBar->GetUseSuppliedLabels();
}


// ****************************************************************************
// Method: avtLevelsLegend::SetSuppliedLabels
//
// Programmer: Kathleen Bonnell
// Creation:   Wed Sep 16 13:25:54 PDT 2009
//
// Modifications:
//   
// ****************************************************************************

void
avtLevelsLegend::SetSuppliedLabels(const stringVector &l)
{
    sBar->SetSuppliedLabels(l);
}
// ****************************************************************************
// Method: avtLevelsLegend::GetCalculatedLabels
//
// Programmer: Kathleen Bonnell
// Creation:   Wed Sep 16 13:25:54 PDT 2009
//
// Modifications:
//   
// ****************************************************************************

void
avtLevelsLegend::GetCalculatedLabels(stringVector &v)
{
    sBar->GetCalculatedLabels(v);
}
