kicad/common/preview_items/two_point_assistant.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2020 Kicad Developers, see AUTHORS.txt for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <preview_items/two_point_assistant.h>
#include <preview_items/draw_context.h>
#include <preview_items/preview_utils.h>
#include <view/view.h>
#include <common.h>
using namespace KIGFX::PREVIEW;
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TWO_POINT_ASSISTANT::TWO_POINT_ASSISTANT( const TWO_POINT_GEOMETRY_MANAGER& aManager,
EDA_UNITS aUnits, GEOM_SHAPE aShape ) :
EDA_ITEM( NOT_USED ),
m_constructMan( aManager ),
m_units( aUnits ),
m_shape( aShape )
{
}
const BOX2I TWO_POINT_ASSISTANT::ViewBBox() const
{
BOX2I tmp;
// no bounding box when no graphic shown
if( m_constructMan.IsReset() )
return tmp;
// this is an edit-time artefact; no reason to try and be smart with the bounding box
// (besides, we can't tell the text extents without a view to know what the scale is)
tmp.SetMaximum();
return tmp;
}
void TWO_POINT_ASSISTANT::ViewDraw( int aLayer, KIGFX::VIEW* aView ) const
{
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KIGFX::GAL& gal = *aView->GetGAL();
// not in a position to draw anything
if( m_constructMan.IsReset() )
return;
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const VECTOR2I origin = m_constructMan.GetOrigin();
const VECTOR2I end = m_constructMan.GetEnd();
const VECTOR2I radVec = end - origin;
if( radVec.x == 0 && radVec.y == 0 )
{
return; // text next to cursor jumps alot around in this corner case
}
gal.ResetTextAttributes();
std::vector<wxString> cursorStrings;
if( m_shape == GEOM_SHAPE::SEGMENT )
{
cursorStrings.push_back( DimensionLabel( "l", radVec.EuclideanNorm(), m_units ) );
}
else if( m_shape == GEOM_SHAPE::RECT )
{
cursorStrings.push_back( DimensionLabel( "x", std::abs( radVec.x ), m_units ) );
cursorStrings.push_back( DimensionLabel( "y", std::abs( radVec.y ), m_units ) );
}
else if( m_shape == GEOM_SHAPE::CIRCLE )
{
KIGFX::PREVIEW::DRAW_CONTEXT preview_ctx( *aView );
preview_ctx.DrawLine( origin, end, false );
cursorStrings.push_back( DimensionLabel( "r", radVec.EuclideanNorm(), m_units ) );
}
// place the text next to cursor, on opposite side from drawing
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DrawTextNextToCursor( aView, end, origin - end, cursorStrings, aLayer == LAYER_SELECT_OVERLAY );
}