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Diffstat (limited to 'src/plugins/Ui/skinned/eqgraph.cpp')
| -rw-r--r-- | src/plugins/Ui/skinned/eqgraph.cpp | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/plugins/Ui/skinned/eqgraph.cpp b/src/plugins/Ui/skinned/eqgraph.cpp new file mode 100644 index 000000000..1d7d070f7 --- /dev/null +++ b/src/plugins/Ui/skinned/eqgraph.cpp @@ -0,0 +1,163 @@ +/*************************************************************************** + * Copyright (C) 2006-2009 by Ilya Kotov * + * forkotov02@hotmail.ru * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + ***************************************************************************/ +#include <QPainter> + +#include "skin.h" +#include "eqgraph.h" + +EQGraph::EQGraph (QWidget *parent) + : PixmapWidget (parent) +{ + m_skin = Skin::instance(); + setPixmap (m_skin->getEqPart (Skin::EQ_GRAPH)); + clear(); + m_ratio = m_skin->ratio(); + draw(); + connect (m_skin, SIGNAL (skinChanged()), this, SLOT (updateSkin())); + setVisible(!m_skin->getEqPart (Skin::EQ_GRAPH).isNull()); +} + +EQGraph::~EQGraph() +{} + +void EQGraph::addValue (int value) +{ + if (m_values.size() >= 10) + return; + m_values.append (value); + if (m_values.size() == 10) + { + draw(); + } +} + +void EQGraph::clear () +{ + m_values.clear(); + update(); +} + +void EQGraph::init_spline (double * x, double * y, int n, double * y2) +{ + 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) +{ + 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() +{ + QPixmap pixmap = m_skin->getEqPart (Skin::EQ_GRAPH); + if (pixmap.isNull()) + pixmap = QPixmap(113*m_ratio,19*m_ratio); + + 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 < 113; 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*m_ratio, y*m_ratio, m_skin->getEqSpline (y)); + } + setPixmap (pixmap); + delete [] bands; +} + +void EQGraph::updateSkin() +{ + m_ratio = m_skin->ratio(); + draw(); + setVisible(!m_skin->getEqPart (Skin::EQ_GRAPH).isNull()); +} + |