Chris@58: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@32:
Chris@32: /*
Chris@59: Sonic Visualiser
Chris@59: An audio file viewer and annotation editor.
Chris@59: Centre for Digital Music, Queen Mary, University of London.
Chris@32:
Chris@59: This program is free software; you can redistribute it and/or
Chris@59: modify it under the terms of the GNU General Public License as
Chris@59: published by the Free Software Foundation; either version 2 of the
Chris@59: License, or (at your option) any later version. See the file
Chris@59: COPYING included with this distribution for more information.
Chris@32: */
Chris@32:
Chris@32: /*
Chris@32: This is a modified version of a source file from the KDE
Chris@32: libraries. Copyright (c) 1998-2004 J�rg Habenicht, Richard J
Chris@32: Moore, Chris Cannam and others, distributed under the GNU Lesser
Chris@32: General Public License.
Chris@32:
Chris@32: Ported to Qt4 by Chris Cannam.
Chris@32: */
Chris@32:
Chris@32:
Chris@32: #include "LEDButton.h"
Chris@32:
Chris@32: #include <QPainter>
Chris@32: #include <QImage>
Chris@32: #include <QColor>
Chris@33: #include <QMouseEvent>
Chris@32:
Chris@34: #include <iostream>
Chris@34:
Chris@32:
Chris@32: class LEDButton::LEDButtonPrivate
Chris@32: {
Chris@32: friend class LEDButton;
Chris@32:
Chris@32: int dark_factor;
Chris@32: QColor offcolor;
Chris@32: QPixmap *off_map;
Chris@32: QPixmap *on_map;
Chris@32: };
Chris@32:
Chris@32:
Chris@32: LEDButton::LEDButton(QWidget *parent) :
Chris@32: QWidget(parent),
Chris@34: led_state(true)
Chris@32: {
Chris@32: QColor col(Qt::green);
Chris@32: d = new LEDButton::LEDButtonPrivate;
Chris@32: d->dark_factor = 300;
Chris@32: d->offcolor = col.dark(300);
Chris@32: d->off_map = 0;
Chris@32: d->on_map = 0;
Chris@32:
Chris@32: setColor(col);
Chris@32: }
Chris@32:
Chris@32:
Chris@32: LEDButton::LEDButton(const QColor& col, QWidget *parent) :
Chris@32: QWidget(parent),
Chris@34: led_state(true)
Chris@32: {
Chris@32: d = new LEDButton::LEDButtonPrivate;
Chris@32: d->dark_factor = 300;
Chris@32: d->offcolor = col.dark(300);
Chris@32: d->off_map = 0;
Chris@32: d->on_map = 0;
Chris@32:
Chris@32: setColor(col);
Chris@32: }
Chris@32:
Chris@34: LEDButton::LEDButton(const QColor& col, bool state, QWidget *parent) :
Chris@32: QWidget(parent),
Chris@32: led_state(state)
Chris@32: {
Chris@32: d = new LEDButton::LEDButtonPrivate;
Chris@32: d->dark_factor = 300;
Chris@32: d->offcolor = col.dark(300);
Chris@32: d->off_map = 0;
Chris@32: d->on_map = 0;
Chris@32:
Chris@32: setColor(col);
Chris@32: }
Chris@32:
Chris@32: LEDButton::~LEDButton()
Chris@32: {
Chris@32: delete d->off_map;
Chris@32: delete d->on_map;
Chris@32: delete d;
Chris@32: }
Chris@32:
Chris@32: void
Chris@33: LEDButton::mousePressEvent(QMouseEvent *e)
Chris@33: {
Chris@34: std::cerr << "LEDButton(" << this << ")::mousePressEvent" << std::endl;
Chris@34:
Chris@33: if (e->buttons() & Qt::LeftButton) {
Chris@33: toggle();
Chris@34: bool newState = state();
Chris@587: SVDEBUG << "emitting new state " << newState << endl;
Chris@34: emit stateChanged(newState);
Chris@33: }
Chris@33: }
Chris@33:
Chris@33: void
Chris@189: LEDButton::enterEvent(QEvent *)
Chris@189: {
Chris@189: emit mouseEntered();
Chris@189: }
Chris@189:
Chris@189: void
Chris@189: LEDButton::leaveEvent(QEvent *)
Chris@189: {
Chris@189: emit mouseLeft();
Chris@189: }
Chris@189:
Chris@189: void
Chris@32: LEDButton::paintEvent(QPaintEvent *)
Chris@32: {
Chris@32: QPainter paint;
Chris@32: QColor color;
Chris@32: QBrush brush;
Chris@32: QPen pen;
Chris@32:
Chris@32: // First of all we want to know what area should be updated
Chris@32: // Initialize coordinates, width, and height of the LED
Chris@32: int width = this->width();
Chris@32:
Chris@32: // Make sure the LED is round!
Chris@32: if (width > this->height())
Chris@32: width = this->height();
Chris@32: width -= 2; // leave one pixel border
Chris@32: if (width < 0)
Chris@32: width = 0;
Chris@32:
Chris@34: QPixmap *tmpMap = 0;
Chris@34:
Chris@34: if (led_state) {
Chris@34: if (d->on_map) {
Chris@496: if (d->on_map->size() == size()) {
Chris@496: paint.begin(this);
Chris@496: paint.drawPixmap(0, 0, *d->on_map);
Chris@496: paint.end();
Chris@496: return;
Chris@496: } else {
Chris@496: delete d->on_map;
Chris@496: d->on_map = 0;
Chris@496: }
Chris@34: }
Chris@34: } else {
Chris@34: if (d->off_map) {
Chris@496: if (d->off_map->size() == size()) {
Chris@496: paint.begin(this);
Chris@496: paint.drawPixmap(0, 0, *d->off_map);
Chris@496: paint.end();
Chris@496: return;
Chris@496: } else {
Chris@496: delete d->off_map;
Chris@496: d->off_map = 0;
Chris@496: }
Chris@34: }
Chris@34: }
Chris@32:
Chris@32: int scale = 1;
Chris@34: width *= scale;
Chris@32:
Chris@34: tmpMap = new QPixmap(width, width);
Chris@34: tmpMap->fill(palette().background().color());
Chris@34: paint.begin(tmpMap);
Chris@32:
Chris@33: paint.setRenderHint(QPainter::Antialiasing, true);
Chris@32:
Chris@32: // Set the color of the LED according to given parameters
Chris@32: color = (led_state) ? led_color : d->offcolor;
Chris@32:
Chris@32: // Set the brush to SolidPattern, this fills the entire area
Chris@32: // of the ellipse which is drawn first
Chris@32: brush.setStyle(Qt::SolidPattern);
Chris@32: brush.setColor(color);
Chris@32: paint.setBrush(brush);
Chris@32:
Chris@32: // Draws a "flat" LED with the given color:
Chris@32: paint.drawEllipse( scale, scale, width - scale*2, width - scale*2 );
Chris@32:
Chris@32: // Draw the bright light spot of the LED now, using modified "old"
Chris@32: // painter routine taken from KDEUI�s LEDButton widget:
Chris@32:
Chris@32: // Setting the new width of the pen is essential to avoid "pixelized"
Chris@32: // shadow like it can be observed with the old LED code
Chris@32: pen.setWidth( 2 * scale );
Chris@32:
Chris@32: // shrink the light on the LED to a size about 2/3 of the complete LED
Chris@32: int pos = width/5 + 1;
Chris@32: int light_width = width;
Chris@32: light_width *= 2;
Chris@32: light_width /= 3;
Chris@32:
Chris@32: // Calculate the LED�s "light factor":
Chris@32: int light_quote = (130*2/(light_width?light_width:1))+100;
Chris@32:
Chris@32: // Now draw the bright spot on the LED:
Chris@32: while (light_width) {
Chris@32: color = color.light( light_quote ); // make color lighter
Chris@32: pen.setColor( color ); // set color as pen color
Chris@32: paint.setPen( pen ); // select the pen for drawing
Chris@32: paint.drawEllipse( pos, pos, light_width, light_width ); // draw the ellipse (circle)
Chris@32: light_width--;
Chris@32: if (!light_width)
Chris@32: break;
Chris@32: paint.drawEllipse( pos, pos, light_width, light_width );
Chris@32: light_width--;
Chris@32: if (!light_width)
Chris@32: break;
Chris@32: paint.drawEllipse( pos, pos, light_width, light_width );
Chris@32: pos++; light_width--;
Chris@32: }
Chris@32:
Chris@32: // Drawing of bright spot finished, now draw a thin border
Chris@32: // around the LED which resembles a shadow with light coming
Chris@32: // from the upper left.
Chris@32:
Chris@33: // pen.setWidth( 2 * scale + 1 ); // ### shouldn't this value be smaller for smaller LEDs?
Chris@33: pen.setWidth(2 * scale);
Chris@32: brush.setStyle(Qt::NoBrush);
Chris@32: paint.setBrush(brush); // This avoids filling of the ellipse
Chris@32:
Chris@32: // Set the initial color value to colorGroup().light() (bright) and start
Chris@32: // drawing the shadow border at 45� (45*16 = 720).
Chris@32:
Chris@32: int angle = -720;
Chris@32: color = palette().light().color();
Chris@32:
Chris@32: for (int arc = 120; arc < 2880; arc += 240) {
Chris@32: pen.setColor(color);
Chris@32: paint.setPen(pen);
Chris@32: int w = width - pen.width()/2 - scale + 1;
Chris@33: paint.drawArc(pen.width()/2 + 1, pen.width()/2 + 1, w - 2, w - 2, angle + arc, 240);
Chris@33: paint.drawArc(pen.width()/2 + 1, pen.width()/2 + 1, w - 2, w - 2, angle - arc, 240);
Chris@32: color = color.dark(110); //FIXME: this should somehow use the contrast value
Chris@32: } // end for ( angle = 720; angle < 6480; angle += 160 )
Chris@32:
Chris@32: paint.end();
Chris@32: //
Chris@32: // painting done
Chris@32:
Chris@34: QPixmap *&dest = led_state ? d->on_map : d->off_map;
Chris@34:
Chris@34: if (scale > 1) {
Chris@34:
Chris@32: QImage i = tmpMap->toImage();
Chris@33: width /= scale;
Chris@32: delete tmpMap;
Chris@33: dest = new QPixmap(QPixmap::fromImage
Chris@33: (i.scaled(width, width,
Chris@33: Qt::KeepAspectRatio,
Chris@33: Qt::SmoothTransformation)));
Chris@34:
Chris@34: } else {
Chris@34:
Chris@34: dest = tmpMap;
Chris@32: }
Chris@34:
Chris@34: paint.begin(this);
Chris@34: paint.drawPixmap(0, 0, *dest);
Chris@34: paint.end();
Chris@32: }
Chris@32:
Chris@34: bool
Chris@32: LEDButton::state() const
Chris@32: {
Chris@32: return led_state;
Chris@32: }
Chris@32:
Chris@32: QColor
Chris@32: LEDButton::color() const
Chris@32: {
Chris@32: return led_color;
Chris@32: }
Chris@32:
Chris@32: void
Chris@34: LEDButton::setState( bool state )
Chris@32: {
Chris@32: if (led_state != state)
Chris@32: {
Chris@32: led_state = state;
Chris@32: update();
Chris@32: }
Chris@32: }
Chris@32:
Chris@32: void
Chris@32: LEDButton::toggleState()
Chris@32: {
Chris@34: led_state = (led_state == true) ? false : true;
Chris@32: // setColor(led_color);
Chris@32: update();
Chris@32: }
Chris@32:
Chris@32: void
Chris@32: LEDButton::setColor(const QColor& col)
Chris@32: {
Chris@32: if(led_color!=col) {
Chris@32: led_color = col;
Chris@32: d->offcolor = col.dark(d->dark_factor);
Chris@32: delete d->on_map;
Chris@32: d->on_map = 0;
Chris@32: delete d->off_map;
Chris@32: d->off_map = 0;
Chris@32: update();
Chris@32: }
Chris@32: }
Chris@32:
Chris@32: void
Chris@32: LEDButton::setDarkFactor(int darkfactor)
Chris@32: {
Chris@32: if (d->dark_factor != darkfactor) {
Chris@32: d->dark_factor = darkfactor;
Chris@32: d->offcolor = led_color.dark(darkfactor);
Chris@32: update();
Chris@32: }
Chris@32: }
Chris@32:
Chris@32: int
Chris@32: LEDButton::darkFactor() const
Chris@32: {
Chris@32: return d->dark_factor;
Chris@32: }
Chris@32:
Chris@32: void
Chris@32: LEDButton::toggle()
Chris@32: {
Chris@32: toggleState();
Chris@32: }
Chris@32:
Chris@32: void
Chris@32: LEDButton::on()
Chris@32: {
Chris@34: setState(true);
Chris@32: }
Chris@32:
Chris@32: void
Chris@32: LEDButton::off()
Chris@32: {
Chris@34: setState(false);
Chris@32: }
Chris@32:
Chris@32: QSize
Chris@32: LEDButton::sizeHint() const
Chris@32: {
Chris@33: return QSize(17, 17);
Chris@32: }
Chris@32:
Chris@32: QSize
Chris@32: LEDButton::minimumSizeHint() const
Chris@32: {
Chris@33: return QSize(17, 17);
Chris@32: }
Chris@32: