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-rw-r--r--src/ui/eqgraph.cpp226
1 files changed, 113 insertions, 113 deletions
diff --git a/src/ui/eqgraph.cpp b/src/ui/eqgraph.cpp
index 314e504d9..1492a32e6 100644
--- a/src/ui/eqgraph.cpp
+++ b/src/ui/eqgraph.cpp
@@ -1,5 +1,5 @@
/***************************************************************************
- * Copyright (C) 2006 by Ilya Kotov *
+ * Copyright (C) 2006-2008 by Ilya Kotov *
* forkotov02@hotmail.ru *
* *
* This program is free software; you can redistribute it and/or modify *
@@ -22,142 +22,142 @@
#include "skin.h"
#include "eqgraph.h"
-EQGraph::EQGraph ( QWidget *parent )
- : PixmapWidget ( parent )
+EQGraph::EQGraph (QWidget *parent)
+ : PixmapWidget (parent)
{
- m_skin = Skin::getPointer();
- setPixmap ( m_skin->getEqPart ( Skin::EQ_GRAPH ) );
- clear();
- draw();
- connect ( m_skin, SIGNAL ( skinChanged() ), this, SLOT ( updateSkin() ) );
+ m_skin = Skin::getPointer();
+ setPixmap (m_skin->getEqPart (Skin::EQ_GRAPH));
+ clear();
+ draw();
+ connect (m_skin, SIGNAL (skinChanged()), this, SLOT (updateSkin()));
+ setVisible(!m_skin->getEqPart (Skin::EQ_GRAPH).isNull());
}
-
EQGraph::~EQGraph()
{}
-void EQGraph::addValue ( int value )
+void EQGraph::addValue (int value)
{
- if ( m_values.size() >= 10 )
- return;
- m_values.append ( value );
- if ( m_values.size() == 10 )
- {
- draw();
- }
+ if (m_values.size() >= 10)
+ return;
+ m_values.append (value);
+ if (m_values.size() == 10)
+ {
+ draw();
+ }
}
void EQGraph::clear ()
{
- m_values.clear();
- update();
+ m_values.clear();
+ update();
}
-void EQGraph::init_spline ( double * x, double * y, int n, double * y2 )
+void EQGraph::init_spline (double * x, double * y, int n, double * y2)
{
- int i, k;
- double p, qn, sig, un, *u;
-
- //u = ( gfloat * ) g_malloc ( n * sizeof ( gfloat ) );
- u = new double[n];
-
- y2[0] = u[0] = 0.0;
-
- for ( i = 1; i < n - 1; i++ )
- {
- sig = ( ( double ) x[i] - x[i - 1] ) / ( ( double ) x[i + 1] - x[i - 1] );
- p = sig * y2[i - 1] + 2.0;
- y2[i] = ( sig - 1.0 ) / p;
- u[i] =
- ( ( ( double ) y[i + 1] - y[i] ) / ( x[i + 1] - x[i] ) ) -
- ( ( ( double ) y[i] - y[i - 1] ) / ( x[i] - x[i - 1] ) );
- u[i] = ( 6.0 * u[i] / ( x[i + 1] - x[i - 1] ) - sig * u[i - 1] ) / p;
- }
- qn = un = 0.0;
-
- y2[n - 1] = ( un - qn * u[n - 2] ) / ( qn * y2[n - 2] + 1.0 );
- for ( k = n - 2; k >= 0; k-- )
- y2[k] = y2[k] * y2[k + 1] + u[k];
- //g_free ( u );
- delete[] u;
+ int i, k;
+ double p, qn, sig, un, *u;
+
+ u = new double[n];
+
+ y2[0] = u[0] = 0.0;
+
+ for (i = 1; i < n - 1; i++)
+ {
+ sig = ((double) x[i] - x[i - 1]) / ((double) x[i + 1] - x[i - 1]);
+ p = sig * y2[i - 1] + 2.0;
+ y2[i] = (sig - 1.0) / p;
+ u[i] =
+ (((double) y[i + 1] - y[i]) / (x[i + 1] - x[i])) -
+ (((double) y[i] - y[i - 1]) / (x[i] - x[i - 1]));
+ u[i] = (6.0 * u[i] / (x[i + 1] - x[i - 1]) - sig * u[i - 1]) / p;
+ }
+ qn = un = 0.0;
+
+ y2[n - 1] = (un - qn * u[n - 2]) / (qn * y2[n - 2] + 1.0);
+ for (k = n - 2; k >= 0; k--)
+ y2[k] = y2[k] * y2[k + 1] + u[k];
+ delete[] u;
}
-double EQGraph::eval_spline ( double xa[], double ya[], double y2a[], int n, double x )
+double EQGraph::eval_spline (double xa[], double ya[], double y2a[], int n, double x)
{
- int klo, khi, k;
- double h, b, a;
-
- klo = 0;
- khi = n - 1;
- while ( khi - klo > 1 )
- {
- k = ( khi + klo ) >> 1;
- if ( xa[k] > x )
- khi = k;
- else
- klo = k;
- }
- h = xa[khi] - xa[klo];
- a = ( xa[khi] - x ) / h;
- b = ( x - xa[klo] ) / h;
- return ( a * ya[klo] + b * ya[khi] +
- ( ( a * a * a - a ) * y2a[klo] +
- ( b * b * b - b ) * y2a[khi] ) * ( h * h ) / 6.0 );
+ int klo, khi, k;
+ double h, b, a;
+
+ klo = 0;
+ khi = n - 1;
+ while (khi - klo > 1)
+ {
+ k = (khi + klo) >> 1;
+ if (xa[k] > x)
+ khi = k;
+ else
+ klo = k;
+ }
+ h = xa[khi] - xa[klo];
+ a = (xa[khi] - x) / h;
+ b = (x - xa[klo]) / h;
+ return (a * ya[klo] + b * ya[khi] +
+ ((a * a * a - a) * y2a[klo] +
+ (b * b * b - b) * y2a[khi]) * (h * h) / 6.0);
}
void EQGraph::draw()
{
- if(m_values.size()!=10)
- {
- setPixmap ( m_skin->getEqPart ( Skin::EQ_GRAPH ) );
- return;
- }
-
- int i, y, ymin, ymax, py = 0;
- double x[] = { 0, 11, 23, 35, 47, 59, 71, 83, 97, 109 }, yf[10];
- double *bands = new double[10];
-
- for ( int i = 0; i<10; ++i )
- {
- bands[i] = m_values.at ( i );
- }
- QPixmap pixmap = m_skin->getEqPart ( Skin::EQ_GRAPH );
-
- init_spline ( x, bands, 10, yf );
- for ( i = 0; i < 109; i++ )
- {
- y = 9 -
- ( int ) ( ( eval_spline ( x, bands, yf, 10, i ) *
- 9.0 ) / 20.0 );
- if ( y < 0 )
- y = 0;
- if ( y > 18 )
- y = 18;
- if ( !i )
- py = y;
- if ( y < py )
- {
- ymin = y;
- ymax = py;
- }
- else
- {
- ymin = py;
- ymax = y;
- }
- py = y;
-
- QPainter paint ( &pixmap );
- paint.drawPixmap ( i, y, m_skin->getEqSpline ( y ) ) ;
-
-
- }
- setPixmap ( pixmap );
- delete [] bands;
+ QPixmap pixmap = m_skin->getEqPart (Skin::EQ_GRAPH);
+ if (pixmap.isNull())
+ pixmap = QPixmap(113,19);
+
+ if (m_values.size()!=10)
+ {
+ setPixmap (pixmap);
+ return;
+ }
+
+ int i, y, ymin, ymax, py = 0;
+ double x[] = { 0, 11, 23, 35, 47, 59, 71, 83, 97, 109 }, yf[10];
+ double *bands = new double[10];
+
+ for (int i = 0; i < 10; ++i)
+ {
+ bands[i] = m_values.at (i);
+ }
+
+ init_spline (x, bands, 10, yf);
+ for (i = 0; i < 109; i++)
+ {
+ y = 9 - (int) ((eval_spline (x, bands, yf, 10, i) * 9.0) / 20.0);
+ if (y < 0)
+ y = 0;
+ if (y > 18)
+ y = 18;
+ if (!i)
+ py = y;
+ if (y < py)
+ {
+ ymin = y;
+ ymax = py;
+ }
+ else
+ {
+ ymin = py;
+ ymax = y;
+ }
+ py = y;
+
+ QPainter paint (&pixmap);
+ paint.drawPixmap (i, y, m_skin->getEqSpline (y)) ;
+
+
+ }
+ setPixmap (pixmap);
+ delete [] bands;
}
void EQGraph::updateSkin()
{
- draw();
+ draw();
+ setVisible(!m_skin->getEqPart (Skin::EQ_GRAPH).isNull());
}
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