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//
// The original FieldMeter class is Copyright (c) 1994, 2006 by Mike Romberg
// ( mike.romberg@noaa.gov )
//
// Modifications from FieldMeter class done in Oct. 1995
// by Brian Grayson ( bgrayson@netbsd.org )
//
// Modifications from FieldMeterDecay class done in Oct. 1998
// by Scott McNab ( jedi@tartarus.uwa.edu.au )
//
// In order to use the FieldMeterGraph class in place of a FieldMeter class in
// a meter file (say, cpumeter.cc), make the following changes:
// 1. Change cpumeter.h to include fieldmetergraph.h instead of
// fieldmeter.h
// 2. Change CPUMeter to inherit from FieldMeterGraph, rather than
// FieldMeter.
// 3. Change the constructor call to use FieldMeterGraph(), rather than
// FieldMeter().
// 4. Make the meter call FieldMeterGraph::checkResources(),
// to pick up graphNumCols resource.
// 5. Make the checkResources () function in the meter set the
// useGraph_ variable according to the, e.g., xosview*cpuGraph resource.
#include "fieldmetergraph.h"
#include <stdio.h>
FieldMeterGraph::FieldMeterGraph( XOSView *parent,
int numfields, const char *title,
const char *legend, int docaptions, int dolegends,
int dousedlegends )
: FieldMeterDecay (parent, numfields, title, legend, docaptions,
dolegends, dousedlegends)
{
useGraph_ = 0;
heightfield_ = NULL;
lastWinState = XOSView::OBSCURED;
// set number of columns to a reasonable default in case we can't
// find the resource
setNumCols( 100 );
}
FieldMeterGraph::~FieldMeterGraph( void )
{
delete [] heightfield_;
}
void FieldMeterGraph::drawfields( int mandatory )
{
int i,j;
enum XOSView::windowVisibilityState currWinState;
if( !useGraph_ )
{
// Call FieldMeterDecay code if this meter should not be
// drawn as a graph
FieldMeterDecay::drawfields( mandatory );
return;
}
if( total_ <= 0.0 )
return;
// allocate memory for height field graph storage
// note: this is done here as it is not certain that both
// numfields_ and graphNumCols_ are defined in the constructor
if( heightfield_ == NULL )
{
if( numfields_ > 0 && graphNumCols_ > 0 )
{
heightfield_ = new double [numfields_*graphNumCols_];
for( i = 0; i < graphNumCols_; i++ )
{
for( j = 0; j < numfields_; j++ )
{
if( j < numfields_-1 )
heightfield_[i*numfields_+j] = 0.0;
else
heightfield_[i*numfields_+j] = 1.0;
}
}
}
}
// check current position here and slide graph if necessary
if( graphpos_ >= graphNumCols_ )
{
for( i = 0; i < graphNumCols_-1; i++ )
{
for( j = 0; j < numfields_; j++ )
{
heightfield_[i*numfields_+j] = heightfield_[(i+1)*numfields_+j];
}
}
graphpos_ = graphNumCols_ - 1;
}
// get current values to be plotted
for( i = 0; i < numfields_; i++ )
{
double a = fields_[i] / total_;
if( a <= 0.0 )
a = 0.0;
if( a >= 1.0 )
a = 1.0;
heightfield_[graphpos_*numfields_+i] = a;
}
currWinState = parent_->getWindowVisibilityState();
// Try to avoid having to redraw everything.
if (!mandatory && currWinState == XOSView::FULLY_VISIBLE && currWinState == lastWinState)
{
// scroll area
int col_width = width_/graphNumCols_;
if( col_width < 1 )
{
col_width = 1;
}
int sx = x_ + col_width;
int swidth = width_ - col_width;
int sheight = height_ + 1;
if( sx > x_ && swidth > 0 && sheight > 0 )
parent_->copyArea( sx, y_, swidth, sheight, x_, y_ );
drawBar( graphNumCols_ - 1 );
} else {
// need to draw entire graph for some reason
for( i = 0; i < graphNumCols_; i++ ) {
drawBar( i );
}
}
lastWinState = currWinState;
graphpos_++;
parent_->setStippleN(0); // Restore all-bits stipple.
if ( dousedlegends_ )
{
drawused( mandatory );
}
}
void FieldMeterGraph::drawBar( int i )
{
int j;
int y = y_ + height_;
int x = x_ + i*width_/graphNumCols_;
int barwidth = (x_ + (i+1)*width_/graphNumCols_)-x;
if( barwidth>0 )
{
int barheight;
for( j = 0 ; j < numfields_; j++ )
{
/* Round up, by adding 0.5 before
* converting to an int. */
barheight = (int)((heightfield_[i*numfields_+j]*height_)+0.5);
parent_->setForeground( colors_[j] );
parent_->setStippleN(j%4);
if( barheight > (y-y_) )
barheight = (y-y_);
// hack to ensure last field always reaches top of graph area
if( j == numfields_-1 )
barheight = (y-y_);
y -= barheight;
if( barheight>0 )
parent_->drawFilledRectangle( x, y, barwidth, barheight );
}
}
}
void FieldMeterGraph::checkResources( void )
{
FieldMeterDecay::checkResources();
const char *ptr = parent_->getResource( "graphNumCols" );
if( ptr )
{
int i;
if( sscanf( ptr, "%d", &i ) == 1 )
{
if( i>0 )
{
setNumCols( i );
}
}
}
}
void FieldMeterGraph::setNumCols( int n )
{
graphNumCols_ = n;
graphpos_ = graphNumCols_-1;
if( heightfield_ )
delete [] heightfield_;
heightfield_ = NULL;
}
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