1 files changed, 89 insertions, 0 deletions
diff --git a/lib/kotext/KoTextZoomHandler.cpp b/lib/kotext/KoTextZoomHandler.cpp
new file mode 100644
index 00000000..306c7f2f
--- /dev/null
+++ b/lib/kotext/KoTextZoomHandler.cpp
@@ -0,0 +1,89 @@
+/* This file is part of the KDE project
+   Copyright (C) 2001-2005 David Faure <faure@kde.org>
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+*/
+
+#include "KoTextZoomHandler.h"
+#include <kdebug.h>
+#include <qpaintdevice.h>
+#include <KoUnit.h>
+#include <KoGlobal.h>
+
+// Layout text at 1440 DPI
+// Well, not really always 1440 DPI, but always 20 times the point size
+// This is constant, no need to litterally apply 1440 DPI at all resolutions.
+int KoTextZoomHandler::m_layoutUnitFactor = 20;
+
+#if 0
+int KoTextZoomHandler::fontSizeToLayoutUnit( double ptSizeFloat, bool forPrint ) const
+{
+    return ptToLayoutUnit( ptSizeFloat / ( m_zoomedResolutionY *
+        ( forPrint ? 1.0 : (72.0 / KoGlobal::dpiY()) ) ) );
+}
+#endif
+
+double KoTextZoomHandler::layoutUnitToFontSize( int luSize, bool /*forPrint*/ ) const
+{
+    // Qt will use QPaintDevice::x11AppDpiY() to go from pt to pixel for fonts
+    return layoutUnitPtToPt( luSize ) * m_zoomedResolutionY
+#ifdef Q_WS_X11
+        / POINT_TO_INCH(QPaintDevice::x11AppDpiY())
+#endif
+        ;
+}
+
+int KoTextZoomHandler::layoutUnitToPixelX( int x, int w ) const
+{
+    // We call layoutUnitToPixelX on the right value, i.e. x+w-1,
+    // and then determine the height from the result (i.e. right-left+1).
+    // Calling layoutUnitToPixelX(w) leads to rounding problems.
+    return layoutUnitToPixelY( x + w - 1 ) - layoutUnitToPixelY( x ) + 1;
+}
+
+int KoTextZoomHandler::layoutUnitToPixelY( int y, int h ) const
+{
+    // We call layoutUnitToPixelY on the bottom value, i.e. y+h-1,
+    // and then determine the height from the result (i.e. bottom-top+1).
+    // Calling layoutUnitToPixelY(h) leads to rounding problems.
+    return layoutUnitToPixelY( y + h - 1 ) - layoutUnitToPixelY( y ) + 1;
+}
+
+int KoTextZoomHandler::layoutUnitToPixelX( int lupix ) const
+{
+    return int( static_cast<double>( lupix * m_zoomedResolutionX )
+                / ( static_cast<double>( m_layoutUnitFactor ) * m_resolutionX ) );
+}
+
+int KoTextZoomHandler::layoutUnitToPixelY( int lupix ) const
+{
+    // qRound replaced with a truncation, too many problems (e.g. bottom of parags)
+    return int( static_cast<double>( lupix * m_zoomedResolutionY )
+                / ( static_cast<double>( m_layoutUnitFactor ) * m_resolutionY ) );
+}
+
+int KoTextZoomHandler::pixelToLayoutUnitX( int x ) const
+{
+    return qRound( static_cast<double>( x * m_layoutUnitFactor * m_resolutionX )
+                   / m_zoomedResolutionX );
+}
+
+int KoTextZoomHandler::pixelToLayoutUnitY( int y ) const
+{
+    return qRound( static_cast<double>( y * m_layoutUnitFactor * m_resolutionY )
+                   / m_zoomedResolutionY );
+}
+