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+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <drawinglayer/drawinglayerdllapi.h>
+
+#include <drawinglayer/primitive2d/BufferedDecompositionPrimitive2D.hxx>
+#include <basegfx/color/bcolor.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+
+
+// HelplinePrimitive2D class
+
+namespace drawinglayer::primitive2d
+{
+ /** HelplineStyle2D definition
+
+ The available styles of Helplines
+ */
+ enum class HelplineStyle2D
+ {
+ Point,
+ Line
+ };
+
+ /** HelplinePrimitive2D class
+
+ This primitive provides a view-dependent helpline definition. The Helpline
+ is defined by a line equation (Point and vector) and a style. When the style
+ is a line, dependent from Viewport the visible part of that Helpline is
+ constructed. For Point, a cross is constructed. This primitive is highly
+ view-dependent.
+
+ The visualisation uses the two given colors to create a dashed line with
+ the given dash length.
+ */
+ class DRAWINGLAYER_DLLPUBLIC HelplinePrimitive2D final : public BufferedDecompositionPrimitive2D
+ {
+ private:
+ /// Helpline geometry definition
+ basegfx::B2DPoint maPosition;
+ basegfx::B2DVector maDirection;
+ HelplineStyle2D meStyle;
+
+ /// Helpline style definition
+ basegfx::BColor maRGBColA;
+ basegfx::BColor maRGBColB;
+ double mfDiscreteDashLength;
+
+ /** the last used object to view transformtion and the last Viewport,
+ used from getDecomposition for decide buffering
+ */
+ basegfx::B2DHomMatrix maLastObjectToViewTransformation;
+ basegfx::B2DRange maLastViewport;
+
+ /// create local decomposition
+ virtual void create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const override;
+
+ public:
+ /// constructor
+ HelplinePrimitive2D(
+ const basegfx::B2DPoint& rPosition,
+ const basegfx::B2DVector& rDirection,
+ HelplineStyle2D eStyle,
+ const basegfx::BColor& rRGBColA,
+ const basegfx::BColor& aRGBColB,
+ double fDiscreteDashLength);
+
+ /// data read access
+ const basegfx::B2DPoint& getPosition() const { return maPosition; }
+ const basegfx::B2DVector& getDirection() const { return maDirection; }
+ HelplineStyle2D getStyle() const { return meStyle; }
+ const basegfx::BColor& getRGBColA() const { return maRGBColA; }
+ const basegfx::BColor& getRGBColB() const { return maRGBColB; }
+ double getDiscreteDashLength() const { return mfDiscreteDashLength; }
+
+ /// compare operator
+ virtual bool operator==(const BasePrimitive2D& rPrimitive) const override;
+
+ /// provide unique ID
+ virtual sal_uInt32 getPrimitive2DID() const override;
+
+ /// Override standard getDecomposition to be view-dependent here
+ virtual void get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const override;
+ };
+} // end of namespace drawinglayer::primitive2d
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */