lbajardsilogic@0: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
lbajardsilogic@0: 
lbajardsilogic@0: /*
lbajardsilogic@0:     Sonic Visualiser
lbajardsilogic@0:     An audio file viewer and annotation editor.
lbajardsilogic@0:     Centre for Digital Music, Queen Mary, University of London.
lbajardsilogic@0:     
lbajardsilogic@0:     This program is free software; you can redistribute it and/or
lbajardsilogic@0:     modify it under the terms of the GNU General Public License as
lbajardsilogic@0:     published by the Free Software Foundation; either version 2 of the
lbajardsilogic@0:     License, or (at your option) any later version.  See the file
lbajardsilogic@0:     COPYING included with this distribution for more information.
lbajardsilogic@0: */
lbajardsilogic@0: 
lbajardsilogic@0: /*
lbajardsilogic@0:     This is a modified version of a source file from the KDE
lbajardsilogic@0:     libraries.  Copyright (c) 1998-2004 Jörg Habenicht, Richard J
lbajardsilogic@0:     Moore, Chris Cannam and others, distributed under the GNU Lesser
lbajardsilogic@0:     General Public License.
lbajardsilogic@0: 
lbajardsilogic@0:     Ported to Qt4 by Chris Cannam.
lbajardsilogic@0: */
lbajardsilogic@0: 
lbajardsilogic@0: 
lbajardsilogic@0: #include "LEDButton.h"
lbajardsilogic@0: 
lbajardsilogic@0: #include <QPainter>
lbajardsilogic@0: #include <QImage>
lbajardsilogic@0: #include <QColor>
lbajardsilogic@0: #include <QMouseEvent>
lbajardsilogic@0: 
lbajardsilogic@0: #include <iostream>
lbajardsilogic@0: 
lbajardsilogic@0: 
lbajardsilogic@0: class LEDButton::LEDButtonPrivate
lbajardsilogic@0: {
lbajardsilogic@0:     friend class LEDButton;
lbajardsilogic@0: 
lbajardsilogic@0:     int dark_factor;
lbajardsilogic@0:     QColor offcolor;
lbajardsilogic@0:     QPixmap *off_map;
lbajardsilogic@0:     QPixmap *on_map;
lbajardsilogic@0: };
lbajardsilogic@0: 
lbajardsilogic@0: 
lbajardsilogic@0: LEDButton::LEDButton(QWidget *parent) :
lbajardsilogic@0:     QWidget(parent),
lbajardsilogic@0:     led_state(true)
lbajardsilogic@0: {
lbajardsilogic@0:     QColor col(Qt::green);
lbajardsilogic@0:     d = new LEDButton::LEDButtonPrivate;
lbajardsilogic@0:     d->dark_factor = 300;
lbajardsilogic@0:     d->offcolor = col.dark(300);
lbajardsilogic@0:     d->off_map = 0;
lbajardsilogic@0:     d->on_map = 0;
lbajardsilogic@0:     
lbajardsilogic@0:     setColor(col);
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: 
lbajardsilogic@0: LEDButton::LEDButton(const QColor& col, QWidget *parent) :
lbajardsilogic@0:     QWidget(parent),
lbajardsilogic@0:     led_state(true)
lbajardsilogic@0: {
lbajardsilogic@0:     d = new LEDButton::LEDButtonPrivate;
lbajardsilogic@0:     d->dark_factor = 300;
lbajardsilogic@0:     d->offcolor = col.dark(300);
lbajardsilogic@0:     d->off_map = 0;
lbajardsilogic@0:     d->on_map = 0;
lbajardsilogic@0: 
lbajardsilogic@0:     setColor(col);
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: LEDButton::LEDButton(const QColor& col, bool state, QWidget *parent) :
lbajardsilogic@0:     QWidget(parent),
lbajardsilogic@0:     led_state(state)
lbajardsilogic@0: {
lbajardsilogic@0:     d = new LEDButton::LEDButtonPrivate;
lbajardsilogic@0:     d->dark_factor = 300;
lbajardsilogic@0:     d->offcolor = col.dark(300);
lbajardsilogic@0:     d->off_map = 0;
lbajardsilogic@0:     d->on_map = 0;
lbajardsilogic@0: 
lbajardsilogic@0:     setColor(col);
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: LEDButton::~LEDButton()
lbajardsilogic@0: {
lbajardsilogic@0:     delete d->off_map;
lbajardsilogic@0:     delete d->on_map;
lbajardsilogic@0:     delete d;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: LEDButton::mousePressEvent(QMouseEvent *e)
lbajardsilogic@0: {
lbajardsilogic@0:     std::cerr << "LEDButton(" << this << ")::mousePressEvent" << std::endl;
lbajardsilogic@0: 
lbajardsilogic@0:     if (e->buttons() & Qt::LeftButton) {
lbajardsilogic@0: 	toggle();
lbajardsilogic@0: 	bool newState = state();
lbajardsilogic@0: 	std::cerr << "emitting new state " << newState << std::endl;
lbajardsilogic@0: 	emit stateChanged(newState);
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: LEDButton::enterEvent(QEvent *)
lbajardsilogic@0: {
lbajardsilogic@0:     emit mouseEntered();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: LEDButton::leaveEvent(QEvent *)
lbajardsilogic@0: {
lbajardsilogic@0:     emit mouseLeft();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: LEDButton::paintEvent(QPaintEvent *)
lbajardsilogic@0: {
lbajardsilogic@0:     QPainter paint;
lbajardsilogic@0:     QColor color;
lbajardsilogic@0:     QBrush brush;
lbajardsilogic@0:     QPen pen;
lbajardsilogic@0: 		
lbajardsilogic@0:     // First of all we want to know what area should be updated
lbajardsilogic@0:     // Initialize coordinates, width, and height of the LED
lbajardsilogic@0:     int	width = this->width();
lbajardsilogic@0: 
lbajardsilogic@0:     // Make sure the LED is round!
lbajardsilogic@0:     if (width > this->height())
lbajardsilogic@0: 	width = this->height();
lbajardsilogic@0:     width -= 2; // leave one pixel border
lbajardsilogic@0:     if (width < 0) 
lbajardsilogic@0: 	width = 0;
lbajardsilogic@0: 
lbajardsilogic@0:     QPixmap *tmpMap = 0;
lbajardsilogic@0: 
lbajardsilogic@0:     if (led_state) {
lbajardsilogic@0: 	if (d->on_map) {
lbajardsilogic@0: 	    paint.begin(this);
lbajardsilogic@0: 	    paint.drawPixmap(0, 0, *d->on_map);
lbajardsilogic@0: 	    paint.end();
lbajardsilogic@0: 	    return;
lbajardsilogic@0: 	}
lbajardsilogic@0:     } else {
lbajardsilogic@0: 	if (d->off_map) {
lbajardsilogic@0: 	    paint.begin(this);
lbajardsilogic@0: 	    paint.drawPixmap(0, 0, *d->off_map);
lbajardsilogic@0: 	    paint.end();
lbajardsilogic@0: 	    return;
lbajardsilogic@0: 	}
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     int scale = 1;
lbajardsilogic@0:     width *= scale;
lbajardsilogic@0: 
lbajardsilogic@0:     tmpMap = new QPixmap(width, width);
lbajardsilogic@0:     tmpMap->fill(palette().background().color());
lbajardsilogic@0:     paint.begin(tmpMap);
lbajardsilogic@0: 
lbajardsilogic@0:     paint.setRenderHint(QPainter::Antialiasing, true);
lbajardsilogic@0: 
lbajardsilogic@0:     // Set the color of the LED according to given parameters
lbajardsilogic@0:     color = (led_state) ? led_color : d->offcolor;
lbajardsilogic@0: 
lbajardsilogic@0:     // Set the brush to SolidPattern, this fills the entire area
lbajardsilogic@0:     // of the ellipse which is drawn first
lbajardsilogic@0:     brush.setStyle(Qt::SolidPattern);
lbajardsilogic@0:     brush.setColor(color);
lbajardsilogic@0:     paint.setBrush(brush);
lbajardsilogic@0: 
lbajardsilogic@0:     // Draws a "flat" LED with the given color:
lbajardsilogic@0:     paint.drawEllipse( scale, scale, width - scale*2, width - scale*2 );
lbajardsilogic@0: 
lbajardsilogic@0:     // Draw the bright light spot of the LED now, using modified "old"
lbajardsilogic@0:     // painter routine taken from KDEUI´s LEDButton widget:
lbajardsilogic@0: 
lbajardsilogic@0:     // Setting the new width of the pen is essential to avoid "pixelized"
lbajardsilogic@0:     // shadow like it can be observed with the old LED code
lbajardsilogic@0:     pen.setWidth( 2 * scale );
lbajardsilogic@0: 
lbajardsilogic@0:     // shrink the light on the LED to a size about 2/3 of the complete LED
lbajardsilogic@0:     int pos = width/5 + 1;
lbajardsilogic@0:     int light_width = width;
lbajardsilogic@0:     light_width *= 2;
lbajardsilogic@0:     light_width /= 3;
lbajardsilogic@0: 	
lbajardsilogic@0:     // Calculate the LED´s "light factor":
lbajardsilogic@0:     int light_quote = (130*2/(light_width?light_width:1))+100;
lbajardsilogic@0: 
lbajardsilogic@0:     // Now draw the bright spot on the LED:
lbajardsilogic@0:     while (light_width) {
lbajardsilogic@0: 	color = color.light( light_quote );                      // make color lighter
lbajardsilogic@0: 	pen.setColor( color );                                   // set color as pen color
lbajardsilogic@0: 	paint.setPen( pen );                                     // select the pen for drawing
lbajardsilogic@0: 	paint.drawEllipse( pos, pos, light_width, light_width ); // draw the ellipse (circle)
lbajardsilogic@0: 	light_width--;
lbajardsilogic@0: 	if (!light_width)
lbajardsilogic@0: 	    break;
lbajardsilogic@0: 	paint.drawEllipse( pos, pos, light_width, light_width );
lbajardsilogic@0: 	light_width--;
lbajardsilogic@0: 	if (!light_width)
lbajardsilogic@0: 	    break;
lbajardsilogic@0: 	paint.drawEllipse( pos, pos, light_width, light_width );
lbajardsilogic@0: 	pos++; light_width--;
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     // Drawing of bright spot finished, now draw a thin border
lbajardsilogic@0:     // around the LED which resembles a shadow with light coming
lbajardsilogic@0:     // from the upper left.
lbajardsilogic@0: 
lbajardsilogic@0: //    pen.setWidth( 2 * scale + 1 ); // ### shouldn't this value be smaller for smaller LEDs?
lbajardsilogic@0:     pen.setWidth(2 * scale);
lbajardsilogic@0:     brush.setStyle(Qt::NoBrush);
lbajardsilogic@0:     paint.setBrush(brush); // This avoids filling of the ellipse
lbajardsilogic@0: 
lbajardsilogic@0:     // Set the initial color value to colorGroup().light() (bright) and start
lbajardsilogic@0:     // drawing the shadow border at 45° (45*16 = 720).
lbajardsilogic@0: 
lbajardsilogic@0:     int angle = -720;
lbajardsilogic@0:     color = palette().light().color();
lbajardsilogic@0:     
lbajardsilogic@0:     for (int arc = 120; arc < 2880; arc += 240) {
lbajardsilogic@0: 	pen.setColor(color);
lbajardsilogic@0: 	paint.setPen(pen);
lbajardsilogic@0: 	int w = width - pen.width()/2 - scale + 1;
lbajardsilogic@0: 	paint.drawArc(pen.width()/2 + 1, pen.width()/2 + 1, w - 2, w - 2, angle + arc, 240);
lbajardsilogic@0: 	paint.drawArc(pen.width()/2 + 1, pen.width()/2 + 1, w - 2, w - 2, angle - arc, 240);
lbajardsilogic@0: 	color = color.dark(110); //FIXME: this should somehow use the contrast value
lbajardsilogic@0:     }	// end for ( angle = 720; angle < 6480; angle += 160 )
lbajardsilogic@0: 
lbajardsilogic@0:     paint.end();
lbajardsilogic@0:     //
lbajardsilogic@0:     // painting done
lbajardsilogic@0: 
lbajardsilogic@0:     QPixmap *&dest = led_state ? d->on_map : d->off_map;
lbajardsilogic@0: 
lbajardsilogic@0:     if (scale > 1) {
lbajardsilogic@0: 
lbajardsilogic@0: 	QImage i = tmpMap->toImage();
lbajardsilogic@0: 	width /= scale;
lbajardsilogic@0: 	delete tmpMap;
lbajardsilogic@0: 	dest = new QPixmap(QPixmap::fromImage
lbajardsilogic@0: 			   (i.scaled(width, width, 
lbajardsilogic@0: 				     Qt::KeepAspectRatio,
lbajardsilogic@0: 				     Qt::SmoothTransformation)));
lbajardsilogic@0: 
lbajardsilogic@0:     } else {
lbajardsilogic@0: 
lbajardsilogic@0: 	dest = tmpMap;
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     paint.begin(this);
lbajardsilogic@0:     paint.drawPixmap(0, 0, *dest);
lbajardsilogic@0:     paint.end();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: bool
lbajardsilogic@0: LEDButton::state() const
lbajardsilogic@0: {
lbajardsilogic@0:     return led_state;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: QColor
lbajardsilogic@0: LEDButton::color() const
lbajardsilogic@0: {
lbajardsilogic@0:     return led_color;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: LEDButton::setState( bool state )
lbajardsilogic@0: {
lbajardsilogic@0:     if (led_state != state)
lbajardsilogic@0:     {
lbajardsilogic@0: 	led_state = state;
lbajardsilogic@0: 	update();
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: LEDButton::toggleState()
lbajardsilogic@0: {
lbajardsilogic@0:     led_state = (led_state == true) ? false : true;
lbajardsilogic@0:     // setColor(led_color);
lbajardsilogic@0:     update();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: LEDButton::setColor(const QColor& col)
lbajardsilogic@0: {
lbajardsilogic@0:     if(led_color!=col) {
lbajardsilogic@0: 	led_color = col;
lbajardsilogic@0: 	d->offcolor = col.dark(d->dark_factor);
lbajardsilogic@0: 	delete d->on_map;
lbajardsilogic@0: 	d->on_map = 0;
lbajardsilogic@0: 	delete d->off_map;
lbajardsilogic@0: 	d->off_map = 0;
lbajardsilogic@0: 	update();
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: LEDButton::setDarkFactor(int darkfactor)
lbajardsilogic@0: {
lbajardsilogic@0:     if (d->dark_factor != darkfactor) {
lbajardsilogic@0: 	d->dark_factor = darkfactor;
lbajardsilogic@0: 	d->offcolor = led_color.dark(darkfactor);
lbajardsilogic@0: 	update();
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: int
lbajardsilogic@0: LEDButton::darkFactor() const
lbajardsilogic@0: {
lbajardsilogic@0:     return d->dark_factor;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: LEDButton::toggle()
lbajardsilogic@0: {
lbajardsilogic@0:     toggleState();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: LEDButton::on()
lbajardsilogic@0: {
lbajardsilogic@0:     setState(true);
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: LEDButton::off()
lbajardsilogic@0: {
lbajardsilogic@0:     setState(false);
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: QSize
lbajardsilogic@0: LEDButton::sizeHint() const
lbajardsilogic@0: {
lbajardsilogic@0:     return QSize(17, 17);
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: QSize
lbajardsilogic@0: LEDButton::minimumSizeHint() const
lbajardsilogic@0: {
lbajardsilogic@0:     return QSize(17, 17);
lbajardsilogic@0: }
lbajardsilogic@0: