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Diffstat (limited to 'chart2/source/tools/RelativePositionHelper.cxx')
| -rw-r--r-- | chart2/source/tools/RelativePositionHelper.cxx | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/chart2/source/tools/RelativePositionHelper.cxx b/chart2/source/tools/RelativePositionHelper.cxx new file mode 100644 index 000000000..260888e90 --- /dev/null +++ b/chart2/source/tools/RelativePositionHelper.cxx @@ -0,0 +1,381 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <RelativePositionHelper.hxx> +#include <com/sun/star/chart2/RelativeSize.hpp> +#include <com/sun/star/awt/Size.hpp> +#include <rtl/math.hxx> +#include <osl/diagnose.h> + +using namespace ::com::sun::star; + +namespace chart +{ + +chart2::RelativePosition RelativePositionHelper::getReanchoredPosition( + const chart2::RelativePosition & rPosition, + const chart2::RelativeSize & rObjectSize, + drawing::Alignment aNewAnchor ) +{ + chart2::RelativePosition aResult( rPosition ); + if( rPosition.Anchor != aNewAnchor ) + { + sal_Int32 nShiftHalfWidths = 0; + sal_Int32 nShiftHalfHeights = 0; + + // normalize to top-left + switch( rPosition.Anchor ) + { + case drawing::Alignment_TOP_LEFT: + break; + case drawing::Alignment_LEFT: + nShiftHalfHeights -= 1; + break; + case drawing::Alignment_BOTTOM_LEFT: + nShiftHalfHeights -= 2; + break; + case drawing::Alignment_TOP: + nShiftHalfWidths -= 1; + break; + case drawing::Alignment_CENTER: + nShiftHalfWidths -= 1; + nShiftHalfHeights -= 1; + break; + case drawing::Alignment_BOTTOM: + nShiftHalfWidths -= 1; + nShiftHalfHeights -= 2; + break; + case drawing::Alignment_TOP_RIGHT: + nShiftHalfWidths -= 2; + break; + case drawing::Alignment_RIGHT: + nShiftHalfWidths -= 2; + nShiftHalfHeights -= 1; + break; + case drawing::Alignment_BOTTOM_RIGHT: + nShiftHalfWidths -= 2; + nShiftHalfHeights -= 2; + break; + case drawing::Alignment::Alignment_MAKE_FIXED_SIZE: + break; + } + + // transform + switch( aNewAnchor ) + { + case drawing::Alignment_TOP_LEFT: + break; + case drawing::Alignment_LEFT: + nShiftHalfHeights += 1; + break; + case drawing::Alignment_BOTTOM_LEFT: + nShiftHalfHeights += 2; + break; + case drawing::Alignment_TOP: + nShiftHalfWidths += 1; + break; + case drawing::Alignment_CENTER: + nShiftHalfWidths += 1; + nShiftHalfHeights += 1; + break; + case drawing::Alignment_BOTTOM: + nShiftHalfWidths += 1; + nShiftHalfHeights += 2; + break; + case drawing::Alignment_TOP_RIGHT: + nShiftHalfWidths += 2; + break; + case drawing::Alignment_RIGHT: + nShiftHalfWidths += 2; + nShiftHalfHeights += 1; + break; + case drawing::Alignment_BOTTOM_RIGHT: + nShiftHalfWidths += 2; + nShiftHalfHeights += 2; + break; + case drawing::Alignment::Alignment_MAKE_FIXED_SIZE: + break; + } + + if( nShiftHalfWidths != 0 ) + aResult.Primary += (rObjectSize.Primary / 2.0) * nShiftHalfWidths; + if( nShiftHalfHeights != 0 ) + aResult.Secondary += (rObjectSize.Secondary / 2.0) * nShiftHalfHeights; + } + + return aResult; +} + +awt::Point RelativePositionHelper::getUpperLeftCornerOfAnchoredObject( + awt::Point aPoint + , awt::Size aObjectSize + , drawing::Alignment aAnchor ) +{ + awt::Point aResult( aPoint ); + + double fXDelta = 0.0; + double fYDelta = 0.0; + + // adapt x-value + switch( aAnchor ) + { + case drawing::Alignment_TOP: + case drawing::Alignment_CENTER: + case drawing::Alignment_BOTTOM: + fXDelta -= static_cast< double >( aObjectSize.Width ) / 2.0; + break; + case drawing::Alignment_TOP_RIGHT: + case drawing::Alignment_RIGHT: + case drawing::Alignment_BOTTOM_RIGHT: + fXDelta -= aObjectSize.Width; + break; + case drawing::Alignment_TOP_LEFT: + case drawing::Alignment_LEFT: + case drawing::Alignment_BOTTOM_LEFT: + default: + // nothing to do + break; + } + + // adapt y-value + switch( aAnchor ) + { + case drawing::Alignment_LEFT: + case drawing::Alignment_CENTER: + case drawing::Alignment_RIGHT: + fYDelta -= static_cast< double >( aObjectSize.Height ) / 2.0; + break; + case drawing::Alignment_BOTTOM_LEFT: + case drawing::Alignment_BOTTOM: + case drawing::Alignment_BOTTOM_RIGHT: + fYDelta -= aObjectSize.Height; + break; + case drawing::Alignment_TOP_LEFT: + case drawing::Alignment_TOP: + case drawing::Alignment_TOP_RIGHT: + default: + // nothing to do + break; + } + + aResult.X += static_cast< sal_Int32 >( ::rtl::math::round( fXDelta )); + aResult.Y += static_cast< sal_Int32 >( ::rtl::math::round( fYDelta )); + + return aResult; +} + +awt::Point RelativePositionHelper::getCenterOfAnchoredObject( + awt::Point aPoint + , awt::Size aUnrotatedObjectSize + , drawing::Alignment aAnchor + , double fAnglePi ) +{ + awt::Point aResult( aPoint ); + + double fXDelta = 0.0; + double fYDelta = 0.0; + + // adapt x-value + switch( aAnchor ) + { + case drawing::Alignment_TOP: + case drawing::Alignment_CENTER: + case drawing::Alignment_BOTTOM: + // nothing to do + break; + case drawing::Alignment_TOP_RIGHT: + case drawing::Alignment_RIGHT: + case drawing::Alignment_BOTTOM_RIGHT: + fXDelta -= aUnrotatedObjectSize.Width/2; + break; + case drawing::Alignment_TOP_LEFT: + case drawing::Alignment_LEFT: + case drawing::Alignment_BOTTOM_LEFT: + default: + fXDelta += aUnrotatedObjectSize.Width/2; + break; + } + + // adapt y-value + switch( aAnchor ) + { + case drawing::Alignment_LEFT: + case drawing::Alignment_CENTER: + case drawing::Alignment_RIGHT: + // nothing to do + break; + case drawing::Alignment_BOTTOM_LEFT: + case drawing::Alignment_BOTTOM: + case drawing::Alignment_BOTTOM_RIGHT: + fYDelta -= aUnrotatedObjectSize.Height/2; + break; + case drawing::Alignment_TOP_LEFT: + case drawing::Alignment_TOP: + case drawing::Alignment_TOP_RIGHT: + fYDelta += aUnrotatedObjectSize.Height/2; + break; + default: + // nothing to do + break; + } + + //take rotation into account: + aResult.X += static_cast< sal_Int32 >( + ::rtl::math::round( fXDelta * std::cos( fAnglePi ) + fYDelta * std::sin( fAnglePi ) ) ); + aResult.Y += static_cast< sal_Int32 >( + ::rtl::math::round( - fXDelta * std::sin( fAnglePi ) + fYDelta * std::cos( fAnglePi ) ) ); + + return aResult; +} + +bool RelativePositionHelper::centerGrow( + chart2::RelativePosition & rInOutPosition, + chart2::RelativeSize & rInOutSize, + double fAmountX, double fAmountY ) +{ + chart2::RelativePosition aPos( rInOutPosition ); + chart2::RelativeSize aSize( rInOutSize ); + const double fPosCheckThreshold = 0.02; + const double fSizeCheckThreshold = 0.1; + + // grow/shrink, back to relative + aSize.Primary += fAmountX; + aSize.Secondary += fAmountY; + + double fShiftAmountX = fAmountX / 2.0; + double fShiftAmountY = fAmountY / 2.0; + + // shift X + switch( rInOutPosition.Anchor ) + { + case drawing::Alignment_TOP_LEFT: + case drawing::Alignment_LEFT: + case drawing::Alignment_BOTTOM_LEFT: + aPos.Primary -= fShiftAmountX; + break; + case drawing::Alignment_TOP: + case drawing::Alignment_CENTER: + case drawing::Alignment_BOTTOM: + // nothing + break; + case drawing::Alignment_TOP_RIGHT: + case drawing::Alignment_RIGHT: + case drawing::Alignment_BOTTOM_RIGHT: + aPos.Primary += fShiftAmountX; + break; + case drawing::Alignment::Alignment_MAKE_FIXED_SIZE: + break; + } + + // shift Y + switch( rInOutPosition.Anchor ) + { + case drawing::Alignment_TOP: + case drawing::Alignment_TOP_LEFT: + case drawing::Alignment_TOP_RIGHT: + aPos.Secondary -= fShiftAmountY; + break; + case drawing::Alignment_CENTER: + case drawing::Alignment_LEFT: + case drawing::Alignment_RIGHT: + // nothing + break; + case drawing::Alignment_BOTTOM: + case drawing::Alignment_BOTTOM_LEFT: + case drawing::Alignment_BOTTOM_RIGHT: + aPos.Secondary += fShiftAmountY; + break; + case drawing::Alignment::Alignment_MAKE_FIXED_SIZE: + break; + } + + // anchor must not be changed + OSL_ASSERT( rInOutPosition.Anchor == aPos.Anchor ); + + if( rInOutPosition.Primary == aPos.Primary && + rInOutPosition.Secondary == aPos.Secondary && + rInOutSize.Primary == aSize.Primary && + rInOutSize.Secondary == aSize.Secondary ) + return false; + + // Note: this somewhat complicated check allows the output being + // out-of-bounds if the input was also out-of-bounds, and the change is + // for "advantage". E.g., you have a chart that laps out on the left + // side. If you shrink it, this should be possible, also if it still + // laps out on the left side afterwards. But you shouldn't be able to + // grow it then. + + chart2::RelativePosition aUpperLeft( + RelativePositionHelper::getReanchoredPosition( aPos, aSize, drawing::Alignment_TOP_LEFT )); + chart2::RelativePosition aLowerRight( + RelativePositionHelper::getReanchoredPosition( aPos, aSize, drawing::Alignment_BOTTOM_RIGHT )); + + // Do not grow, if this leads to corners being off-screen + if( fAmountX > 0.0 && + ( (aUpperLeft.Primary < fPosCheckThreshold) || + (aLowerRight.Primary > (1.0 - fPosCheckThreshold)) )) + return false; + if( fAmountY > 0.0 && + ( (aUpperLeft.Secondary < fPosCheckThreshold) || + (aLowerRight.Secondary > (1.0 - fPosCheckThreshold)) )) + return false; + + // Do not shrink, if this leads to a size too small + if( fAmountX < 0.0 && + ( aSize.Primary < fSizeCheckThreshold )) + return false; + if( fAmountY < 0.0 && + ( aSize.Secondary < fSizeCheckThreshold )) + return false; + + rInOutPosition = aPos; + rInOutSize = aSize; + return true; +} + +bool RelativePositionHelper::moveObject( + chart2::RelativePosition & rInOutPosition, + const chart2::RelativeSize & rObjectSize, + double fAmountX, double fAmountY ) +{ + chart2::RelativePosition aPos( rInOutPosition ); + aPos.Primary += fAmountX; + aPos.Secondary += fAmountY; + const double fPosCheckThreshold = 0.02; + + chart2::RelativePosition aUpperLeft( + RelativePositionHelper::getReanchoredPosition( aPos, rObjectSize, drawing::Alignment_TOP_LEFT )); + chart2::RelativePosition aLowerRight( aUpperLeft ); + aLowerRight.Primary += rObjectSize.Primary; + aLowerRight.Secondary += rObjectSize.Secondary; + + const double fFarEdgeThreshold = 1.0 - fPosCheckThreshold; + if( ( fAmountX > 0.0 && (aLowerRight.Primary > fFarEdgeThreshold)) || + ( fAmountX < 0.0 && (aUpperLeft.Primary < fPosCheckThreshold)) || + ( fAmountY > 0.0 && (aLowerRight.Secondary > fFarEdgeThreshold)) || + ( fAmountY < 0.0 && (aUpperLeft.Secondary < fPosCheckThreshold)) ) + return false; + + rInOutPosition = aPos; + return true; +} + +} // namespace chart + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |