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// Copyright (C) 2002 Dominique Devriese <devriese@kde.org>
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 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., 51 Franklin Street, Fifth Floor, Boston, MA
// 02110-1301, USA.
#include "screeninfo.h"
#include <cmath>
ScreenInfo::ScreenInfo( const Rect& docRect, const QRect& viewRect )
: mkrect( docRect.normalized() ), mqrect( viewRect.normalize() )
{
}
Rect ScreenInfo::fromScreen( const QRect& r ) const
{
return Rect(
fromScreen( r.topLeft() ),
fromScreen( r.bottomRight() )
).normalized();
}
Coordinate ScreenInfo::fromScreen( const QPoint& p ) const
{
// invert the y-axis: 0 is at the bottom !
Coordinate t( p.x(), mqrect.height() - p.y() );
t *= mkrect.width();
t /= mqrect.width();
return t + mkrect.bottomLeft();
}
QPoint ScreenInfo::toScreen( const Coordinate& p ) const
{
Coordinate t = p - mkrect.bottomLeft();
t *= mqrect.width();
t /= mkrect.width();
// invert the y-axis: 0 is at the bottom !
return QPoint( (int) t.x, mqrect.height() - (int) t.y );
}
QRect ScreenInfo::toScreen( const Rect& r ) const
{
return QRect(
toScreen( r.bottomLeft() ),
toScreen( r.topRight() )
).normalize();
}
double ScreenInfo::pixelWidth() const
{
Coordinate a = fromScreen( QPoint( 0, 0 ) );
Coordinate b = fromScreen( QPoint( 0, 1000 ) );
return std::fabs( b.y - a.y ) / 1000;
}
const Rect& ScreenInfo::shownRect() const
{
return mkrect;
}
void ScreenInfo::setShownRect( const Rect& r )
{
mkrect = r;
}
const QRect ScreenInfo::viewRect() const
{
return mqrect;
}
void ScreenInfo::setViewRect( const QRect& r )
{
mqrect = r;
}
double ScreenInfo::normalMiss( int width ) const
{
int twidth = width == -1 ? 1 : width;
return (twidth+2)*pixelWidth();
}
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