diff options
Diffstat (limited to 'vcl/source/gdi/gradient.cxx')
| -rw-r--r-- | vcl/source/gdi/gradient.cxx | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/vcl/source/gdi/gradient.cxx b/vcl/source/gdi/gradient.cxx index 9f4f91c38e60..38d8ba4567a2 100644 --- a/vcl/source/gdi/gradient.cxx +++ b/vcl/source/gdi/gradient.cxx @@ -1,3 +1,4 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /************************************************************************* * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. @@ -244,6 +245,99 @@ void Gradient::SetSteps( sal_uInt16 nSteps ) // ----------------------------------------------------------------------- +void Gradient::GetBoundRect( const Rectangle& rRect, Rectangle& rBoundRect, Point& rCenter ) const +{ + Rectangle aRect( rRect ); + sal_uInt16 nAngle = GetAngle() % 3600; + + if( GetStyle() == GRADIENT_LINEAR || GetStyle() == GRADIENT_AXIAL ) + { + aRect.Left()--; + aRect.Top()--; + aRect.Right()++; + aRect.Bottom()++; + + const double fAngle = nAngle * F_PI1800; + const double fWidth = aRect.GetWidth(); + const double fHeight = aRect.GetHeight(); + double fDX = fWidth * fabs( cos( fAngle ) ) + fHeight * fabs( sin( fAngle ) ); + double fDY = fHeight * fabs( cos( fAngle ) ) + fWidth * fabs( sin( fAngle ) ); + + fDX = ( fDX - fWidth ) * 0.5 + 0.5; + fDY = ( fDY - fHeight ) * 0.5 + 0.5; + + aRect.Left() -= (long) fDX; + aRect.Right() += (long) fDX; + aRect.Top() -= (long) fDY; + aRect.Bottom() += (long) fDY; + + rBoundRect = aRect; + rCenter = rRect.Center(); + } + else + { + + if( GetStyle() == GRADIENT_SQUARE || GetStyle() == GRADIENT_RECT ) + { + const double fAngle = nAngle * F_PI1800; + const double fWidth = aRect.GetWidth(); + const double fHeight = aRect.GetHeight(); + double fDX = fWidth * fabs( cos( fAngle ) ) + fHeight * fabs( sin( fAngle ) ); + double fDY = fHeight * fabs( cos( fAngle ) ) + fWidth * fabs( sin( fAngle ) ); + + fDX = ( fDX - fWidth ) * 0.5 + 0.5; + fDY = ( fDY - fHeight ) * 0.5 + 0.5; + + aRect.Left() -= (long) fDX; + aRect.Right() += (long) fDX; + aRect.Top() -= (long) fDY; + aRect.Bottom() += (long) fDY; + } + + Size aSize( aRect.GetSize() ); + + if( GetStyle() == GRADIENT_RADIAL ) + { + // Radien-Berechnung fuer Kreis + aSize.Width() = (long)(0.5 + sqrt((double)aSize.Width()*(double)aSize.Width() + (double)aSize.Height()*(double)aSize.Height())); + aSize.Height() = aSize.Width(); + } + else if( GetStyle() == GRADIENT_ELLIPTICAL ) + { + // Radien-Berechnung fuer Ellipse + aSize.Width() = (long)( 0.5 + (double) aSize.Width() * 1.4142 ); + aSize.Height() = (long)( 0.5 + (double) aSize.Height() * 1.4142 ); + } + else if( GetStyle() == GRADIENT_SQUARE ) + { + if ( aSize.Width() > aSize.Height() ) + aSize.Height() = aSize.Width(); + else + aSize.Width() = aSize.Height(); + } + + // neue Mittelpunkte berechnen + long nZWidth = aRect.GetWidth() * (long) GetOfsX() / 100; + long nZHeight = aRect.GetHeight() * (long) GetOfsY() / 100; + long nBorderX = (long) GetBorder() * aSize.Width() / 100; + long nBorderY = (long) GetBorder() * aSize.Height() / 100; + rCenter = Point( aRect.Left() + nZWidth, aRect.Top() + nZHeight ); + + // Rand beruecksichtigen + aSize.Width() -= nBorderX; + aSize.Height() -= nBorderY; + + // Ausgaberechteck neu setzen + aRect.Left() = rCenter.X() - ( aSize.Width() >> 1 ); + aRect.Top() = rCenter.Y() - ( aSize.Height() >> 1 ); + + aRect.SetSize( aSize ); + rBoundRect = rRect; + } +} + +// ----------------------------------------------------------------------- + Gradient& Gradient::operator=( const Gradient& rGradient ) { DBG_CHKTHIS( Gradient, NULL ); @@ -342,3 +436,5 @@ SvStream& operator<<( SvStream& rOStm, const Gradient& rGradient ) { return( rOStm << *rGradient.mpImplGradient ); } + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |