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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * samplesorter.cc
+ *
+ * Mon Nov 30 07:45:58 CET 2009
+ * Copyright 2009 Bent Bisballe Nyeng
+ * deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ * This file is part of DrumGizmo.
+ *
+ * DrumGizmo 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.
+ *
+ * DrumGizmo 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 DrumGizmo; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+#include "samplesorter.h"
+
+#include <QPainter>
+#include <QPaintEvent>
+
+#include <stdio.h>
+
+#include <math.h>
+#ifndef MAXFLOAT
+#define MAXFLOAT (3.40282347e+38F)
+#endif
+
+SampleSorter::SampleSorter(Selections &s, Selections &p)
+ : selections(s), selections_preview(p)
+{
+ setMouseTracking(true);
+
+ data = NULL;
+ size = 0;
+ attlen = 666; // Magical constants needs biblical proportions...
+
+ sel_moving = SEL_NONE;
+}
+
+void SampleSorter::setShowPreview(bool s)
+{
+ show_preview = s;
+ update();
+}
+
+void SampleSorter::setWavData(const float *data, size_t size)
+{
+ this->data = data;
+ this->size = size;
+ relayout();
+}
+
+int SampleSorter::attackLength()
+{
+ return attlen;
+}
+
+void SampleSorter::setAttackLength(int len)
+{
+ attlen = len;
+ relayout();
+}
+
+void SampleSorter::addSelection(sel_id_t id)
+{
+ Selection s = selections.get(id);
+
+ double energy = 0.0;
+ for(size_t idx = s.from;
+ (idx < (size_t)s.from + (size_t)attackLength()) &&
+ (idx < (size_t)s.to) && (idx < size);
+ idx++) {
+ energy += data[idx] * data[idx];
+ }
+
+ s.energy = energy;
+ selections.update(id, s);
+
+ relayout();
+}
+
+void SampleSorter::addSelectionPreview(sel_id_t id)
+{
+ Selection s = selections_preview.get(id);
+
+ double energy = 0.0;
+ for(size_t idx = s.from;
+ (idx < (size_t)s.from + (size_t)attackLength()) &&
+ (idx < (size_t)s.to) && (idx < size);
+ idx++) {
+ energy += data[idx] * data[idx];
+ }
+
+ s.energy = energy;
+ selections_preview.update(id, s);
+
+ relayout();
+}
+
+void SampleSorter::relayout()
+{
+ min = MAXFLOAT;
+ max = 0.0;
+
+ {
+ QVector<sel_id_t> ids = selections.ids();
+ QVector<sel_id_t>::iterator i = ids.begin();
+ while(i != ids.end()) {
+ Selection sel = selections.get(*i);
+
+ if(sel.energy < min) min = sel.energy;
+ if(sel.energy > max) max = sel.energy;
+
+ i++;
+ }
+ }
+
+ if(show_preview) {
+ QVector<sel_id_t> ids = selections_preview.ids();
+ QVector<sel_id_t>::iterator i = ids.begin();
+ while(i != ids.end()) {
+ Selection sel = selections_preview.get(*i);
+
+ if(sel.energy < min) min = sel.energy;
+ if(sel.energy > max) max = sel.energy;
+
+ i++;
+ }
+ }
+
+ update();
+}
+
+#define MAP(p) (height()-(int)(p*((float)height()/(float)width())))
+
+#define unmapX(x) ((double)x/(double)(width()-1))
+#define unmapY(x) x
+#define mapX(x) (((double)x)*(width()-1))
+#define mapY(x) x
+
+#define C_RADIUS 2
+static void drawCircle(QPainter &p, int x, int y)
+{
+ p.drawEllipse(x - C_RADIUS, y - C_RADIUS, 2 * C_RADIUS, 2 * C_RADIUS);
+}
+
+void SampleSorter::paintEvent(QPaintEvent *event)
+{
+ QPainter painter(this);
+
+ QColor colBg = QColor(180, 200, 180, 160);
+ QColor colFg = QColor(160, 180, 160, 160);
+ QColor colPt = QColor(255, 100, 100, 160);
+ QColor colPtPreview = QColor(0, 0, 255, 160);
+ QColor colPtSel = QColor(255, 255, 100, 160);
+
+ painter.setPen(colBg);
+ painter.setBrush(colBg);
+ painter.drawRect(event->rect());
+
+ painter.setPen(colFg);
+ painter.drawLine(0,height(),width(),0);
+
+ {
+ QVector<sel_id_t> ids = selections.ids();
+ QVector<sel_id_t>::iterator i = ids.begin();
+ while(i != ids.end()) {
+ Selection sel = selections.get(*i);
+ if(*i == selections.active()) painter.setPen(colPtSel);
+ else painter.setPen(colPt);
+ float x = sel.energy / max;
+ x = sqrt(x);
+ x *= (float)width();
+ drawCircle(painter, x, MAP(x));
+ i++;
+ }
+ }
+
+ if(show_preview) {
+ QVector<sel_id_t> ids = selections_preview.ids();
+ QVector<sel_id_t>::iterator i = ids.begin();
+ while(i != ids.end()) {
+ Selection sel = selections_preview.get(*i);
+ painter.setPen(colPtPreview);
+ float x = sel.energy / max;
+ x = sqrt(x);
+ x *= (float)width();
+ drawCircle(painter, x, MAP(x));
+ i++;
+ }
+ }
+
+
+}
+
+sel_id_t SampleSorter::getSelectionByCoordinate(int px, int py)
+{
+ // Hit radius is slithly larger than the circles themselves.
+ int hit_r = C_RADIUS + 1;
+
+ QVector<sel_id_t> ids = selections.ids();
+ QVector<sel_id_t>::iterator i = ids.begin();
+ while(i != ids.end()) {
+ Selection sel = selections.get(*i);
+ float x = (sel.energy/max);
+ x = sqrt(x);
+ x *= (float)width();
+ if(px < (x + hit_r) && px > (x - hit_r) &&
+ py < (MAP(x) + hit_r) && py > (MAP(x) - hit_r)) {
+ return *i;
+ }
+ i++;
+ }
+
+ return SEL_NONE;
+}
+
+void SampleSorter::mouseMoveEvent(QMouseEvent *event)
+{
+ if(sel_moving != SEL_NONE) {
+ Selection sel = selections.get(sel_moving);
+ if(sel_moving != SEL_NONE) {
+ double power = unmapX(event->x());
+ power *= power;
+ power *= max;
+ sel.energy = power;
+ selections.update(sel_moving, sel);
+ }
+
+ update();
+ return;
+ } else {
+ sel_id_t psel = getSelectionByCoordinate(event->x(), event->y());
+ if(psel != SEL_NONE) {
+ setCursor(Qt::UpArrowCursor);
+ } else {
+ setCursor(Qt::ArrowCursor);
+ }
+ }
+}
+
+void SampleSorter::mousePressEvent(QMouseEvent *event)
+{
+ if(event->button() == Qt::LeftButton) {
+ sel_id_t psel = getSelectionByCoordinate(event->x(), event->y());
+ sel_moving = psel;
+ selections.setActive(psel);
+ if(psel != SEL_NONE) {
+ setCursor(Qt::UpArrowCursor);
+ }
+ }
+}
+
+void SampleSorter::mouseReleaseEvent(QMouseEvent *event)
+{
+ if(event->button() == Qt::LeftButton) {
+ sel_moving = SEL_NONE;
+ setCursor(Qt::ArrowCursor);
+ }
+}
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