From 8dc8689a009a3702bf4135e628f9d63df8b2ea36 Mon Sep 17 00:00:00 2001 From: "Tim E. Real" Date: Sun, 28 Nov 2010 21:14:50 +0000 Subject: Added AWL files --- muse2/awl/knob.cpp | 281 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 281 insertions(+) create mode 100644 muse2/awl/knob.cpp (limited to 'muse2/awl/knob.cpp') diff --git a/muse2/awl/knob.cpp b/muse2/awl/knob.cpp new file mode 100644 index 00000000..ccc3988e --- /dev/null +++ b/muse2/awl/knob.cpp @@ -0,0 +1,281 @@ +//============================================================================= +// Awl +// Audio Widget Library +// $Id:$ +// +// Copyright (C) 2002-2006 by Werner Schweer and others +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License version 2. +// +// 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., 675 Mass Ave, Cambridge, MA 02139, USA. +//============================================================================= + +#include "knob.h" + +namespace Awl { + +//--------------------------------------------------------- +// Knob +/// this is the AwlKnob contructor +//--------------------------------------------------------- + +Knob::Knob(QWidget* parent) + : AbstractSlider(parent) + { + _scaleSize = 270; + _markSize = 6; + _border = 2; + points = 0; + } + +//--------------------------------------------------------- +// Knob +//--------------------------------------------------------- + +Knob::~Knob() + { + if (points) + delete points; + } + +//--------------------------------------------------------- +// setText +//--------------------------------------------------------- + +void Knob::setText(const QString& s) + { + if (s != _text) { + _text = s; + update(); + } + } + +//--------------------------------------------------------- +// setScaleSize +//! set the scale size in degrees +// +//! the scale size is the max moving angle measured +//! in degrees +//--------------------------------------------------------- + +void Knob::setScaleSize(int val) + { + if (val != _scaleSize) { + _scaleSize = val; + update(); + } + } + +//--------------------------------------------------------- +// setMarkSize +//! set size of the center marker +//--------------------------------------------------------- + +void Knob::setMarkSize(int val) + { + if (val != _markSize) { + _markSize = val; + update(); + } + } + +//--------------------------------------------------------- +// setBorder +//! set border size +//--------------------------------------------------------- + +void Knob::setBorder(int val) + { + if (val != _border) { + _border = val; + update(); + } + } + +//--------------------------------------------------------- +// mousePressEvent +//--------------------------------------------------------- + +void Knob::mousePressEvent(QMouseEvent* ev) + { + startY = ev->y(); + emit sliderPressed(_id); + if (_center) { + QRect r(points->boundingRect().toRect()); + if (r.contains(ev->pos())) { + setValue(.0f); + valueChange(); + update(); + } + } + } + +//--------------------------------------------------------- +// mouseReleaseEvent +//--------------------------------------------------------- + +void Knob::mouseReleaseEvent(QMouseEvent*) + { + emit sliderReleased(_id); + } + +//--------------------------------------------------------- +// mouseMoveEvent +//--------------------------------------------------------- + +void Knob::mouseMoveEvent(QMouseEvent* ev) + { + int y = ev->y(); + double delta = (maxValue() - minValue()) / 100.0f; + if (delta == 0) + delta = 1; + _value += (startY - y) * delta; + if (_value < minValue()) + _value = _minValue; + else if (_value > maxValue()) + _value = _maxValue; + startY = y; + valueChange(); + update(); + } + +//--------------------------------------------------------- +// paintEvent +//--------------------------------------------------------- + +void Knob::paintEvent(QPaintEvent* ev) + { + QRect rr(ev->rect()); + QPainter p(this); + p.setRenderHint(QPainter::Antialiasing, true); + + int markSize2 = _markSize/2; + int restR = 360 - _scaleSize; + int w = width() - _scaleWidth - 2 * _border; + int h = height() - _scaleWidth/2 - 2 * _border; + + int xoffset, yoffset; + if (_center) + h -= _markSize; + if (w > h) { + yoffset = 0; + xoffset = (w - h) / 2; + w = h; + } + else { + xoffset = 0; + // yoffset = (h - w) / 2; // center + yoffset = h - w; // top align + h = w; + } + + int x = xoffset + _scaleWidth / 2 + _border; + int y = yoffset + _scaleWidth / 2 + _border + (_center ? _markSize+_scaleWidth/2 : 0); + QRectF ar(x, y, w, h); + + QColor sc(isEnabled() ? _scaleColor : Qt::gray); + QColor svc(isEnabled() ? _scaleValueColor : Qt::gray); + + //----------------------------------------- + // draw arc + //----------------------------------------- + + double dvalue = maxValue() - minValue(); + if (_center) { + int size = _scaleSize * 8; + if (_value >= 0) { + int offset = (restR-180) * 8; + int r1 = int (size * _value / maxValue()); + int r2 = size - r1; + p.setPen(QPen(sc, _scaleWidth)); + if (r2 > 1) + p.drawArc(ar, offset, r2); + if (size > 1) + p.drawArc(ar, 90*16, size); + if (r1 > 1) { + p.setPen(QPen(svc, _scaleWidth)); + p.drawArc(ar, offset+r2, r1); + } + } + else { + // int offset = (restR+180) * 8; + int r1 = int(size * _value / minValue()); + int r2 = size - r1; + + p.setPen(QPen(sc, _scaleWidth)); + if (size > 1) + p.drawArc(ar, (restR-180)*8, size); + if (r2 > 1) + p.drawArc(ar, 90 * 16 + r1, r2); + if (r1 > 1) { + p.setPen(QPen(svc, _scaleWidth)); + p.drawArc(ar, 90*16, r1); + } + } + } + else { + int offset = (180-restR) * 8; + int size = _scaleSize * 16; + int r1 = int(size * (_value - minValue()) / dvalue); + int r2 = size - r1; + if (r2 >= 1) { + p.setPen(QPen(sc, _scaleWidth)); + p.drawArc(ar, -offset, r2); + } + if (r1 >= 1) { + p.setPen(QPen(svc, _scaleWidth)); + p.drawArc(ar, r2-offset, r1); + } + } + + //----------------------------------------- + // draw pointer + //----------------------------------------- + + p.setPen(QPen(svc, _scaleWidth)); + double r1 = double(_scaleSize) * (_value-minValue()) / dvalue + 90.0 + + double(restR/2); + r1 = r1 / 180.0 * M_PI; // convert to radians + int rd = w/2; + int x1 = x + rd; + int y1 = y + rd; + int x2 = x1 + lrint(cos(r1) * double(rd)); + int y2 = y1 + lrint(sin(r1) * double(rd)); + p.drawLine(x1, y1, x2, y2); + + //----------------------------------------- + // draw center mark + //----------------------------------------- + + p.setPen(QPen(svc, 0)); + p.setBrush(svc); + if (_center) { + if (points) + delete points; + qreal x = ar.width() / 2 + ar.x(); + qreal y = ar.y() - _markSize - _scaleWidth/2; + points = new QPainterPath(QPointF(x - markSize2, y)); + points->lineTo(x + markSize2, y); + points->lineTo(x, _markSize + y); + points->closeSubpath(); + p.drawPath(*points); + } + + //----------------------------------------- + // draw text + //----------------------------------------- + + if (!_text.isEmpty()) { + p.drawText(rect(), Qt::AlignBottom | Qt::AlignHCenter, _text); + } + } +} + -- cgit v1.2.3