#include <kdebug.h>
#include <kdialogbase.h>
#include <kpixmapeffect.h>
#include <qlabel.h>
#include <qpainter.h>
#include <qwidget.h>
#include "rotwidget.h"
#include "rotwidget.moc"
RotWidget::RotWidget( QWidget *parent, const QColor& c1, const QColor& c2, int sp )
:QWidget(parent), m_color1(c1), m_color2(c2), m_step(0), m_speed(sp)
{
if( (m_speed <= 0) || (m_speed > 20) )
m_speed = 1;
setFixedHeight( 6 );
for( int i = 0; i <= width(); i++ )
preparePixmap( i );
m_stepTimer = new QTimer( this );
connect(m_stepTimer, SIGNAL(timeout()), this, SLOT(stepEvent()));
m_stepTimer->start( 50 );
}
RotWidget::~RotWidget()
{
}
void RotWidget::stepEvent()
{
// This is inefficient as we create too many pixmaps, optimize later.
m_step += m_speed;
if( m_step > width() )
m_step = 0;
repaint( true );
}
// Todo: Optimize drawing.
void RotWidget::paintEvent( QPaintEvent *pe )
{
QPainter p;
p.begin( this );
QRect r = pe->rect();
if( m_stepPixmap.at( m_step ) )
bitBlt( this, r.x(), r.y(), m_stepPixmap.at( m_step ), r.x(), r.y(), r.width(), r.height() );
else
p.fillRect( rect(), Qt::black );
p.end();
}
void RotWidget::resizeEvent( QResizeEvent *re )
{
m_stepPixmap.clear();
for( int i = 0; i <= re->size().width(); i++ )
preparePixmap( i );
}
void RotWidget::preparePixmap( int step )
{
if( step < 0 )
return;
// Explicitly draw our first pixmap. The rest we will bitBlt() from here.
if( step == 0 )
{
KPixmap tmp; tmp.resize( size().width() / 2, size().height() );
KPixmap tmp2(tmp);
KPixmapEffect::gradient( tmp, m_color1, m_color2, KPixmapEffect::HorizontalGradient );
KPixmapEffect::gradient( tmp2, m_color2, m_color1, KPixmapEffect::HorizontalGradient );
KPixmap *px = new KPixmap( size() );
QPainter p;
p.begin( px );
p.drawPixmap( 0, 0, tmp );
p.drawPixmap( size().width()/2, 0, tmp2 );
p.end();
m_stepPixmap.append( px );
}
else if( m_stepPixmap.at( step-1 ) )
{
QPixmap *prev = m_stepPixmap.at( step-1 );
QPixmap next; next.resize( size() );
// convert
// prev = "[------------]"
// to
// next = "------------]["
bitBlt( &next, 0, 0, prev, 1, 0, prev->width()-1, prev->height() );
bitBlt( &next, width()-1, 0, prev, 0, 0, 1, prev->height() );
KPixmap *n = new KPixmap( next );
m_stepPixmap.append( n );
}
}