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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(s)
{
setMouseTracking(true);
data = NULL;
size = 0;
attlen = 666; // Magical constants needs biblical proportions...
sel_moving = SEL_NONE;
}
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::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++;
}
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);
QColor colFg = QColor(160, 180, 160);
QColor colPt = QColor(255, 100, 100);
QColor colPtSel = QColor(255, 255, 100);
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++;
}
}
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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