dialog_image_editor.cpp

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/*
 * This program source code file is part of KICAD, a free EDA CAD application.
 *
 * Copyright (C) 2018 jean-pierre.charras
 * Copyright (C) 2011-2020 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 <wx/dcclient.h>
#include <confirm.h>
#include <bitmap_base.h>

#include <dialogs/dialog_image_editor.h>

#include <algorithm>


DIALOG_IMAGE_EDITOR::DIALOG_IMAGE_EDITOR( wxWindow* aParent, BITMAP_BASE* aItem )
 : DIALOG_IMAGE_EDITOR_BASE( aParent )
{
 m_workingImage = new BITMAP_BASE( *aItem );
 wxString msg;
 msg.Printf( wxT( "%f" ), m_workingImage->GetScale() );
 m_textCtrlScale->SetValue( msg );

 finishDialogSettings();
 m_sdbSizerOK->SetDefault();
}


void DIALOG_IMAGE_EDITOR::OnGreyScaleConvert( wxCommandEvent& event )
{
 wxImage& image = *m_workingImage->GetImageData();
 image = image.ConvertToGreyscale();
 m_workingImage->RebuildBitmap();
 m_panelDraw->Refresh();
}


/*
 * Test params values correctness
 * Currently scale value must give an actual image > MIN_SIZE pixels (mandatory to be able to
 * see the image) and < MAX_SIZE pixels (if bigger, a confirmation will be asked)
 * Note: The image definition is 300ppi in drawing routines.
 */
bool DIALOG_IMAGE_EDITOR::CheckValues()
{
 #define MIN_SIZE 15 // Min size in pixels after scaling (50 mils)
 #define MAX_SIZE 6000 // Max size in pixels after scaling (20 inches)
 double tmp;
 wxString msg = m_textCtrlScale->GetValue();

 // Test number correctness
 if( !msg.ToDouble( &tmp ) || tmp < 0.0 )
 {
 wxMessageBox( _( "Incorrect scale number" ) );
 return false;
 }

 // Test value correctness
 wxSize psize = m_workingImage->GetSizePixels();
 int size_min = (int)std::min( (psize.x * tmp), (psize.y * tmp) );

 if( size_min < MIN_SIZE ) // if the size is too small, the image will be hard to locate
 {
 wxMessageBox( wxString::Format( _( "This scale results in an image which is too small "
 "(%.2f mm or %.1f mil)." ),
 25.4 / 300 * size_min, 1000.0/300.0 * size_min ) );
 return false;
 }

 int size_max = (int)std::max( (psize.x * tmp), (psize.y * tmp) );

 if( size_max > MAX_SIZE )
 {
 // the actual size is 25.4/300 * size_max in mm
 if( !IsOK( this, wxString::Format( _( "This scale results in an image which is very large "
 "(%.1f mm or %.2f in). Are you sure?" ),
 25.4 / 300 * size_max, size_max /300.0 ) ) )
 {
 return false;
 }
 }

 return true;
}


bool DIALOG_IMAGE_EDITOR::TransferDataFromWindow()
{
 return CheckValues();
}


void DIALOG_IMAGE_EDITOR::OnRedrawPanel( wxPaintEvent& event )
{
 wxPaintDC dc( m_panelDraw );
 wxSize size = m_panelDraw->GetClientSize();
 dc.SetDeviceOrigin( size.x/2, size.y/2 );

 double scale = 1.0 / m_workingImage->GetScalingFactor();
 dc.SetUserScale( scale, scale );
 m_workingImage->DrawBitmap( &dc, wxPoint( 0, 0 ) );
}


void DIALOG_IMAGE_EDITOR::TransferToImage( BITMAP_BASE* aItem )
{
 wxString msg = m_textCtrlScale->GetValue();
 double scale = 1.0;
 msg.ToDouble( &scale );
 m_workingImage->SetScale( scale );
 aItem->ImportData( m_workingImage );
}