138 lines
3.9 KiB
C++
138 lines
3.9 KiB
C++
/*
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* This program source code file is part of KICAD, a free EDA CAD application.
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*
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* Copyright (C) 2017-2021 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef PREVIEW_SIMPLE_OUTLINE_ITEM__H_
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#define PREVIEW_SIMPLE_OUTLINE_ITEM__H_
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#include <eda_item.h>
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#include <layers_id_colors_and_visibility.h>
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#include <gal/color4d.h>
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namespace KIGFX
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{
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class VIEW;
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class GAL;
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namespace PREVIEW
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{
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/**
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* SIMPLE_OVERLAY_ITEM is class that represents a visual area drawn on
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* a canvas, used to temporarily demarcate an area or show something
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* on an overlay. An example could be the drag select lasso box.
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*
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* This class is pretty generic in terms of what the area looks like.
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* It provides a fill, stroke and width, which is probably sufficient
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* for most simple previews, but the inheritor has freedom to override
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* this.
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*
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* If this doesn't suit a particular preview, it may mean you should
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* implement your own EDA_ITEM derivative rather than inheriting this.
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*/
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class SIMPLE_OVERLAY_ITEM : public EDA_ITEM
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{
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public:
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SIMPLE_OVERLAY_ITEM();
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/**
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* Set the overlay layer only. You can override this if
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* you have more layers to draw on.
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*/
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void ViewGetLayers( int aLayers[], int& aCount ) const override;
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/**
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* Draw the preview - this is done by calling the two functions:
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* setupGal() and drawPreviewShape(). If you need more than this,
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* or direct access to the VIEW, you probably should make a new
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*.
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*/
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void ViewDraw( int aLayer, KIGFX::VIEW* aView ) const override;
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#if defined(DEBUG)
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void Show( int x, std::ostream& st ) const override
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{
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}
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#endif
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/**
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* Get class name
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* @return string "SIMPLE_OVERLAY_ITEM"
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*/
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virtual wxString GetClass() const override
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{
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return "SIMPLE_OVERLAY_ITEM";
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}
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///< Set the stroke color to set before drawing preview
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void SetStrokeColor( const COLOR4D& aNewColor )
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{
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m_strokeColor = aNewColor;
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}
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///< Set the fill color to set before drawing preview
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void SetFillColor( const COLOR4D& aNewColor )
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{
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m_fillColor = aNewColor;
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}
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///< Set the line width to set before drawing preview
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void SetLineWidth( double aNewWidth )
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{
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m_lineWidth = aNewWidth;
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}
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private:
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/**
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* Set up the GAL canvas - this provides a default implementation,
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* that sets fill, stroke and width.
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*
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* If that's not suitable, you can set more options in
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* updatePreviewShape(), but you might find that defining a new
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* EDA_ITEM derivative is easier for heavily customized cases.
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*/
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void setupGal( KIGFX::GAL& aGal ) const;
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/**
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* Draw the preview onto the given GAL. setupGal() will be called before this function.
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*
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* Subclasses should implement this in terms of their own graphical
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* data.
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*/
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virtual void drawPreviewShape( KIGFX::VIEW* aView ) const { };
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COLOR4D m_fillColor;
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COLOR4D m_strokeColor;
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double m_lineWidth;
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};
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} // PREVIEW
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} // KIGFX
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#endif // PREVIEW_SIMPLE_OUTLINE_ITEM__H_
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