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-rw-r--r--muse2/awl/slider.cpp251
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diff --git a/muse2/awl/slider.cpp b/muse2/awl/slider.cpp
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+//=============================================================================
+// 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 "slider.h"
+
+namespace Awl {
+
+//---------------------------------------------------------
+// Slider
+//---------------------------------------------------------
+
+Slider::Slider(QWidget* parent)
+ : AbstractSlider(parent), orient(Qt::Vertical), _sliderSize(14,14)
+ {
+ init();
+ }
+
+//---------------------------------------------------------
+// Slider
+//---------------------------------------------------------
+
+Slider::Slider(Qt::Orientation orientation, QWidget* parent)
+ : AbstractSlider(parent), orient(orientation), _sliderSize(14,14)
+ {
+ init();
+ }
+
+//---------------------------------------------------------
+// Slider
+//---------------------------------------------------------
+
+void Slider::init()
+ {
+ if (orient == Qt::Vertical)
+ setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding);
+ else
+ setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+ dragMode = false;
+ points = 0;
+ updateKnob();
+ }
+
+//---------------------------------------------------------
+// sizeHint
+//---------------------------------------------------------
+
+QSize Slider::sizeHint() const
+ {
+ int w = _sliderSize.width() + scaleWidth();
+ return orient == Qt::Vertical ? QSize(w, 200) : QSize(200, w);
+ }
+
+//---------------------------------------------------------
+// Slider
+//---------------------------------------------------------
+
+Slider::~Slider()
+ {
+ if (points)
+ delete points;
+ }
+
+//---------------------------------------------------------
+// setOrientation
+//---------------------------------------------------------
+
+void Slider::setOrientation(Qt::Orientation o)
+ {
+ orient = o;
+ updateKnob();
+ update();
+ }
+
+//---------------------------------------------------------
+// updateKnob
+//---------------------------------------------------------
+
+void Slider::updateKnob()
+ {
+ if (points)
+ delete points;
+ points = new QPainterPath;
+ int kh = _sliderSize.height();
+ int kw = _sliderSize.width();
+ points->moveTo(0.0, 0.0);
+ if (orient == Qt::Vertical) {
+ int kh = _sliderSize.height();
+ int kh2 = kh / 2;
+ points->lineTo(kw, -kh2);
+ points->lineTo(kw, kh2);
+ }
+ else {
+ int kw2 = kw/2;
+ points->lineTo(-kw2, kh);
+ points->lineTo(kw2, kh);
+ }
+ points->lineTo(0.0, 0.0);
+ }
+
+//---------------------------------------------------------
+// setInvertedAppearance
+//---------------------------------------------------------
+
+void Slider::setInvertedAppearance(bool val)
+ {
+ AbstractSlider::setInvertedAppearance(val);
+ update();
+ }
+
+//---------------------------------------------------------
+// setSliderSize
+//---------------------------------------------------------
+
+void Slider::setSliderSize(const QSize& s)
+ {
+ _sliderSize = s;
+ update();
+ }
+
+//---------------------------------------------------------
+// mousePressEvent
+//---------------------------------------------------------
+
+void Slider::mousePressEvent(QMouseEvent* ev)
+ {
+ startDrag = ev->pos();
+// if (points->boundingRect().toRect().contains(startDrag)) {
+ emit sliderPressed(_id);
+ dragMode = true;
+ int pixel = (orient == Qt::Vertical) ? height() - _sliderSize.height() : width() - _sliderSize.width();
+ dragppos = int(pixel * (_value - minValue()) / (maxValue() - minValue()));
+ if (_invert)
+ dragppos = pixel - dragppos;
+// }
+ }
+
+//---------------------------------------------------------
+// mouseReleaseEvent
+//---------------------------------------------------------
+
+void Slider::mouseReleaseEvent(QMouseEvent*)
+ {
+ if (dragMode) {
+ emit sliderReleased(_id);
+ dragMode = false;
+ }
+ }
+
+//---------------------------------------------------------
+// mouseMoveEvent
+//---------------------------------------------------------
+
+void Slider::mouseMoveEvent(QMouseEvent* ev)
+ {
+ if (!dragMode)
+ return;
+ int delta = startDrag.y() - ev->y();
+
+// if (_invert)
+// delta = -delta;
+ if (orient == Qt::Horizontal)
+ delta = -delta;
+ int ppos = dragppos + delta;
+ if (ppos < 0)
+ ppos = 0;
+
+ int pixel = (orient == Qt::Vertical) ? height() - _sliderSize.height() : width() - _sliderSize.width();
+ if (ppos > pixel)
+ ppos = pixel;
+ int pos = _invert ? (pixel - ppos) : ppos;
+ _value = (pos * (maxValue() - minValue()) / pixel) + minValue() - 0.000001;
+ update();
+ valueChange();
+ }
+
+//---------------------------------------------------------
+// paint
+// r - phys coord system
+//---------------------------------------------------------
+
+void Slider::paintEvent(QPaintEvent* ev)
+ {
+ int h = height();
+ int w = width();
+ int kw = _sliderSize.width();
+ int kh = _sliderSize.height();
+ int pixel = (orient == Qt::Vertical) ? h - kh : w - kw;
+ double range = maxValue() - minValue();
+ int ppos = int(pixel * (_value - minValue()) / range);
+ if ((orient == Qt::Vertical && _invert) || (orient == Qt::Horizontal && !_invert))
+ ppos = pixel - ppos;
+
+ QRect rr(ev->rect());
+ QPainter p(this);
+
+ QColor sc(isEnabled() ? _scaleColor : Qt::gray);
+ QColor svc(isEnabled() ? _scaleValueColor : Qt::gray);
+ p.setBrush(svc);
+
+ int kh2 = kh/2;
+
+ //---------------------------------------------------
+ // draw scale
+ //---------------------------------------------------
+
+ if (orient == Qt::Vertical) {
+ int xm = (w - _scaleWidth - _sliderSize.height()) / 2;
+ int y1 = kh2;
+ int y2 = h - (ppos + y1);
+ int y3 = h - y1;
+ p.fillRect(xm, y1, _scaleWidth, y2-y1, _invert ? svc : sc);
+ p.fillRect(xm, y2, _scaleWidth, y3-y2, _invert ? sc : svc);
+ p.translate(QPointF(xm + _scaleWidth/2, y2));
+ }
+ else {
+ int ym = (h - _scaleWidth - _sliderSize.height()) / 2;
+ int x1 = kh2;
+ int x2 = w - (ppos + x1);
+ int x3 = w - x1;
+ p.fillRect(x1, ym, x2-x1, _scaleWidth, _invert ? sc : svc);
+ p.fillRect(x2, ym, x3-x2, _scaleWidth, _invert ? svc : sc);
+ p.translate(QPointF(x2, ym + _scaleWidth/2));
+ }
+
+ //---------------------------------------------------
+ // draw slider
+ //---------------------------------------------------
+
+ p.setRenderHint(QPainter::Antialiasing, true);
+ p.setPen(QPen(svc, 0));
+ p.drawPath(*points);
+ }
+}
+
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