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Diffstat (limited to 'kscreensaver/kdesavers/polygon.cpp')
| -rw-r--r-- | kscreensaver/kdesavers/polygon.cpp | 366 |
1 files changed, 366 insertions, 0 deletions
diff --git a/kscreensaver/kdesavers/polygon.cpp b/kscreensaver/kdesavers/polygon.cpp new file mode 100644 index 00000000..55e052f1 --- /dev/null +++ b/kscreensaver/kdesavers/polygon.cpp @@ -0,0 +1,366 @@ +//----------------------------------------------------------------------------- +// +// kpolygon - Basic screen saver for KDE +// +// Copyright (c) Martin R. Jones 1996 +// +// layout management added 1998/04/19 by Mario Weilguni <[email protected]> +// 2001/03/04 Converted to libkscreensaver by Martin R. Jones + +#include <config.h> +#include <stdlib.h> +#include <time.h> +#include <qcolor.h> +#include <qlabel.h> +#include <qslider.h> +#include <qlayout.h> +#include <klocale.h> +#include <kconfig.h> +#include <kglobal.h> +#include <kmessagebox.h> + +#include "polygon.h" +#include <qpainter.h> + +#include "polygon.moc" + + +#define MAXLENGTH 65 +#define MAXVERTICES 19 + +// libkscreensaver interface +extern "C" +{ + KDE_EXPORT const char *kss_applicationName = "kpolygon.kss"; + KDE_EXPORT const char *kss_description = I18N_NOOP( "KPolygon" ); + KDE_EXPORT const char *kss_version = "2.2.0"; + + KDE_EXPORT KScreenSaver *kss_create( WId id ) + { + return new kPolygonSaver( id ); + } + + KDE_EXPORT QDialog *kss_setup() + { + return new kPolygonSetup(); + } +} + +//----------------------------------------------------------------------------- +// dialog to setup screen saver parameters +// +kPolygonSetup::kPolygonSetup( QWidget *parent, const char *name ) + : KDialogBase( parent, name, true, i18n( "Setup Polygon Screen Saver" ), + Ok|Cancel|Help, Ok, true ), saver( 0 ), length( 10 ), vertices( 3 ), + speed( 50 ) +{ + readSettings(); + + QWidget *main = makeMainWidget(); + setButtonText( Help, i18n( "A&bout" ) ); + + QHBoxLayout *tl = new QHBoxLayout(main, 0, spacingHint()); + QVBoxLayout *tl1 = new QVBoxLayout; + tl->addLayout(tl1); + + QLabel *label = new QLabel( i18n("Length:"), main ); + tl1->addWidget(label); + + QSlider *sb = new QSlider(1, MAXLENGTH, 10, length, QSlider::Horizontal, + main ); + sb->setMinimumSize( 90, 20 ); + sb->setTickmarks(QSlider::Below); + sb->setTickInterval(10); + connect( sb, SIGNAL( valueChanged( int ) ), SLOT( slotLength( int ) ) ); + tl1->addWidget(sb); + + label = new QLabel( i18n("Vertices:"), main ); + tl1->addWidget(label); + + sb = new QSlider(3, MAXVERTICES, 2, vertices, QSlider::Horizontal, main); + sb->setMinimumSize( 90, 20 ); + sb->setTickmarks(QSlider::Below); + sb->setTickInterval(2); + connect( sb, SIGNAL( valueChanged( int ) ), SLOT( slotVertices( int ) ) ); + tl1->addWidget(sb); + + label = new QLabel( i18n("Speed:"), main ); + tl1->addWidget(label); + + sb = new QSlider(0, 100, 10, speed, QSlider::Horizontal, main); + sb->setMinimumSize( 90, 20 ); + sb->setTickmarks(QSlider::Below); + sb->setTickInterval(10); + connect( sb, SIGNAL( valueChanged( int ) ), SLOT( slotSpeed( int ) ) ); + tl1->addWidget(sb); + tl1->addStretch(); + + preview = new QWidget( main ); + preview->setFixedSize( 220, 170 ); + preview->setBackgroundColor( black ); + preview->show(); // otherwise saver does not get correct size + saver = new kPolygonSaver( preview->winId() ); + tl->addWidget(preview); + + setMinimumSize( sizeHint() ); +} + +kPolygonSetup::~kPolygonSetup() +{ + delete saver; +} + +// read settings from config file +void kPolygonSetup::readSettings() +{ + KConfig *config = KGlobal::config(); + config->setGroup( "Settings" ); + + length = config->readNumEntry( "Length", length ); + if ( length > MAXLENGTH ) + length = MAXLENGTH; + else if ( length < 1 ) + length = 1; + + vertices = config->readNumEntry( "Vertices", vertices ); + if ( vertices > MAXVERTICES ) + vertices = MAXVERTICES; + else if ( vertices < 3 ) + vertices = 3; + + speed = config->readNumEntry( "Speed", speed ); + if ( speed > 100 ) + speed = 100; + else if ( speed < 50 ) + speed = 50; +} + +void kPolygonSetup::slotLength( int len ) +{ + length = len; + if ( saver ) + saver->setPolygon( length, vertices ); +} + +void kPolygonSetup::slotVertices( int num ) +{ + vertices = num; + if ( saver ) + saver->setPolygon( length, vertices ); +} + +void kPolygonSetup::slotSpeed( int num ) +{ + speed = num; + if ( saver ) + saver->setSpeed( speed ); +} + +// Ok pressed - save settings and exit +void kPolygonSetup::slotOk() +{ + KConfig *config = KGlobal::config(); + config->setGroup( "Settings" ); + + QString slength; + slength.setNum( length ); + config->writeEntry( "Length", slength ); + + QString svertices; + svertices.setNum( vertices ); + config->writeEntry( "Vertices", svertices ); + + QString sspeed; + sspeed.setNum( speed ); + config->writeEntry( "Speed", sspeed ); + + config->sync(); + + accept(); +} + +void kPolygonSetup::slotHelp() +{ + KMessageBox::information(this, + i18n("Polygon Version 2.2.0\n\n"\ + "Written by Martin R. Jones 1996\n"\ + "[email protected]")); +} + +//----------------------------------------------------------------------------- + + +kPolygonSaver::kPolygonSaver( WId id ) : KScreenSaver( id ) +{ + polygons.setAutoDelete( TRUE ); + + readSettings(); + + directions.resize( numVertices ); + colorContext = QColor::enterAllocContext(); + + blank(); + + initialiseColor(); + initialisePolygons(); + + timer.start( speed ); + connect( &timer, SIGNAL( timeout() ), SLOT( slotTimeout() ) ); +} + +kPolygonSaver::~kPolygonSaver() +{ + timer.stop(); + QColor::leaveAllocContext(); + QColor::destroyAllocContext( colorContext ); +} + +// set polygon properties +void kPolygonSaver::setPolygon( int len, int ver ) +{ + timer.stop(); + numLines = len; + numVertices = ver; + + directions.resize( numVertices ); + polygons.clear(); + initialisePolygons(); + blank(); + + timer.start( speed ); +} + +// set the speed +void kPolygonSaver::setSpeed( int spd ) +{ + timer.stop(); + speed = 100-spd; + timer.start( speed ); +} + +// read configuration settings from config file +void kPolygonSaver::readSettings() +{ + KConfig *config = KGlobal::config(); + config->setGroup( "Settings" ); + + numLines = config->readNumEntry( "Length", 10 ); + if ( numLines > 50 ) + numLines = 50; + else if ( numLines < 1 ) + numLines = 1; + + numVertices = config->readNumEntry( "Vertices", 3 ); + if ( numVertices > 20 ) + numVertices = 20; + else if ( numVertices < 3 ) + numVertices = 3; + + speed = 100 - config->readNumEntry( "Speed", 50 ); +} + +// draw next polygon and erase tail +void kPolygonSaver::slotTimeout() +{ + QPainter p( this ); + if ( polygons.count() > numLines ) + { + p.setPen( black ); + p.drawPolyline( *polygons.first() ); + } + + nextColor(); + p.setPen( colors[currentColor] ); + p.drawPolyline( *polygons.last() ); + + if ( polygons.count() > numLines ) + polygons.removeFirst(); + + polygons.append( new QPointArray( polygons.last()->copy() ) ); + moveVertices(); +} + +void kPolygonSaver::blank() +{ + setBackgroundColor( black ); + erase(); +} + +// initialise the polygon +void kPolygonSaver::initialisePolygons() +{ + int i; + + polygons.append( new QPointArray( numVertices + 1 ) ); + + QPointArray &poly = *polygons.last(); + + for ( i = 0; i < numVertices; i++ ) + { + poly.setPoint( i, rnd.getLong(width()), rnd.getLong(height()) ); + directions[i].setX( 16 - rnd.getLong(8) * 4 ); + if ( directions[i].x() == 0 ) + directions[i].setX( 1 ); + directions[i].setY( 16 - rnd.getLong(8) * 4 ); + if ( directions[i].y() == 0 ) + directions[i].setY( 1 ); + } + + poly.setPoint( i, poly.point(0) ); +} + +// move polygon in current direction and change direction if a border is hit +void kPolygonSaver::moveVertices() +{ + int i; + QPointArray &poly = *polygons.last(); + + for ( i = 0; i < numVertices; i++ ) + { + poly.setPoint( i, poly.point(i) + directions[i] ); + if ( poly[i].x() >= (int)width() ) + { + directions[i].setX( -(rnd.getLong(4) + 1) * 4 ); + poly[i].setX( (int)width() ); + } + else if ( poly[i].x() < 0 ) + { + directions[i].setX( (rnd.getLong(4) + 1) * 4 ); + poly[i].setX( 0 ); + } + + if ( poly[i].y() >= (int)height() ) + { + directions[i].setY( -(rnd.getLong(4) + 1) * 4 ); + poly[i].setY( height() ); + } + else if ( poly[i].y() < 0 ) + { + directions[i].setY( (rnd.getLong(4) + 1) * 4 ); + poly[i].setY( 0 ); + } + } + + poly.setPoint( i, poly.point(0) ); +} + +// create a color table of 64 colors +void kPolygonSaver::initialiseColor() +{ + for ( int i = 0; i < 64; i++ ) + { + colors[i].setHsv( i * 360 / 64, 255, 255 ); + } + + currentColor = 0; +} + +// set foreground color to next in the table +void kPolygonSaver::nextColor() +{ + currentColor++; + + if ( currentColor > 63 ) + currentColor = 0; +} + |