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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* canvastoolthreshold.cc
*
* Fri Jul 29 16:27:00 CEST 2011
* Copyright 2011 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 "canvastoolthreshold.h"
#include <math.h>
#define mapX(x) canvas->mapX(x)
#define mapY(x) canvas->mapY(x)
#define unmapX(x) canvas->unmapX(x)
#define unmapY(x) canvas->unmapY(x)
CanvasToolThreshold::CanvasToolThreshold(Canvas *c)
{
canvas = c;
threshold = 0.5;
threshold_is_moving = false;
colThreshold = QColor(255, 127, 127);
colThresholdMoving = QColor(180, 0, 0);
}
bool CanvasToolThreshold::mouseMoveEvent(QMouseEvent *event)
{
if(event->button() != Qt::LeftButton) {
if(abs(event->y() - mapY(threshold)) < 2 ||
abs(event->y() - mapY(-threshold)) < 2 ) {
canvas->setCursor(Qt::SplitVCursor);
return true;
}
}
if(threshold_is_moving) {
float val = unmapY(event->y());
if(fabs(val) > 1.0) val = 1.0;
threshold = fabs(val);
canvas->update();
return true;
}
return false;
}
bool CanvasToolThreshold::mousePressEvent(QMouseEvent *event)
{
if(event->button() == Qt::LeftButton) {
// Check if threshold is being dragged.
if(abs(event->y() - mapY(threshold)) < 2 ||
abs(event->y() - mapY(-threshold)) < 2 ) {
threshold_is_moving = true;
canvas->update();
return true;
}
}
return false;
}
bool CanvasToolThreshold::mouseReleaseEvent(QMouseEvent *event)
{
if(event->button() == Qt::LeftButton) {
if(threshold_is_moving) {
threshold_is_moving = false;
canvas->setCursor(Qt::ArrowCursor);
canvas->update();
emit thresholdChanged(threshold);
return true;
}
}
return false;
}
void CanvasToolThreshold::paintEvent(QPaintEvent *event, QPainter &painter)
{
if(threshold_is_moving) painter.setPen(colThresholdMoving);
else painter.setPen(colThreshold);
painter.drawLine(event->rect().x(), mapY(threshold),
event->rect().x() + event->rect().width(), mapY(threshold));
painter.drawLine(event->rect().x(), mapY(-threshold),
event->rect().x() + event->rect().width(), mapY(-threshold));
}
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