map_shapes_polygon.cpp

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//                                                       //
//                         SAGA                          //
//                                                       //
//      System for Automated Geoscientific Analyses      //
//                                                       //
//           Application Programming Interface           //
//                                                       //
//                  Library: SAGA_API                    //
//                                                       //
//-------------------------------------------------------//
//                                                       //
//                 map_shapes_polygon.cpp                //
//                                                       //
//                 Copyright (C) 2026 by                 //
//                      Olaf Conrad                      //
//                                                       //
//-------------------------------------------------------//
//                                                       //
// This file is part of 'SAGA - System for Automated     //
// Geoscientific Analyses'. SAGA 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.       //
//                                                       //
// SAGA 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, see   //
// <http://www.gnu.org/licenses/>.                       //
//                                                       //
//-------------------------------------------------------//
//                                                       //
//    e-mail:     oconrad@saga-gis.org                   //
//                                                       //
//    contact:    Olaf Conrad                            //
//                Institute of Geography                 //
//                University of Hamburg                  //
//                Germany                                //
//                                                       //
 
//---------------------------------------------------------
#include "../dc_helper.h"
 
#include "map_symbology.h"
 
#include "map_layer.h"
 

//                                                       //
//                                                       //
//                                                       //
 
//---------------------------------------------------------
CSG_Map_Shapes_Polygon::CSG_Map_Shapes_Polygon(CSG_Shapes *pShapes)
        : CSG_Map_Shapes()
{
        Add_Parameters(m_Parameters);
 
        Set_Object(pShapes && pShapes->Get_Type() == SHAPE_TYPE_Polygon ? pShapes : NULL);
 
        m_Parameters.Set_Name(SG_Get_ShapeType_Name(SHAPE_TYPE_Polygon));
}
 

//                                                       //
 
//---------------------------------------------------------
bool CSG_Map_Shapes_Polygon::Add_Parameters(CSG_Parameters &Parameters)
{
        CSG_Map_Shapes::Add_Parameters(Parameters);
 
        //-----------------------------------------------------
        // Display...
 
        BrushList_Add(Parameters, "NODE_DISPLAY" , "DISPLAY_BRUSH"   , _TL("Fill Style"     ), _TL(""));
 
        Parameters.Add_Bool    ("NODE_DISPLAY"   , "OUTLINE"         , _TL("Outline"        ), _TL(""), true)->Set_Collapsed();
        Parameters.Add_Color   ("OUTLINE"        , "OUTLINE_COLOR"   , _TL("Color"          ), _TL(""), SG_GET_RGB(0, 0, 0));
        Parameters.Add_Int     ("OUTLINE"        , "OUTLINE_SIZE"    , _TL("Size"           ), _TL(""), 1, 1, true);
 
        Parameters.Add_Bool    ("NODE_DISPLAY"   , "BOUNDARY_EFFECT" , _TL("Boundary Effect"), _TL(""), false);
        Parameters.Add_Int     ("BOUNDARY_EFFECT", "BOUNDARY_SIZE"   , _TL("Size"           ), _TL(""), 4, 1, true, 32, true);
        Parameters.Add_Color   ("BOUNDARY_EFFECT", "BOUNDARY_COLOR"  , _TL("Color"          ), _TL(""), SG_COLOR_GREY);
 
        Parameters.Add_Choice  ("NODE_DISPLAY"   , "DISPLAY_POINTS"  , _TL("Show Vertices"  ), _TL(""), CSG_String::Format("%s|%s|%s", _TL("no"), _TL("yes"), _TL("with label")), 0);
        Parameters.Add_Bool    ("NODE_DISPLAY"   , "DISPLAY_CENTROID", _TL("Show Centroids" ), _TL(""), false);
 
        //-----------------------------------------------------
        return( true );
}
 

//                                                       //
 
//---------------------------------------------------------
bool CSG_Map_Shapes_Polygon::Parameter_Changed(CSG_Parameters &Parameters, CSG_Parameter &Parameter, int Flags)
{
        if( Flags & PARAMETER_CHECK_VALUES )
        {
                // nop
        }
 
        //-----------------------------------------------------
        if( Flags & PARAMETER_CHECK_ENABLE )
        {
                if(     Parameter.Cmp_Identifier("BOUNDARY_EFFECT") )
                {
                        Parameter.Set_Children_Enabled(Parameter.asBool());
                }
        }
 
        //-----------------------------------------------------
        return( CSG_Map_Shapes::Parameter_Changed(Parameters, Parameter, Flags) );
}
 

//                                                       //
 
//---------------------------------------------------------
bool CSG_Map_Shapes_Polygon::DataObject_Changed(void)
{
        CSG_Map_Shapes::DataObject_Changed();
 
        //-----------------------------------------------------
        return( true );
}
 

//                                                       //
 
//---------------------------------------------------------
bool CSG_Map_Shapes_Polygon::Parameters_Changed(void)
{
        CSG_Map_Shapes::Parameters_Changed();
 
        //-----------------------------------------------------
        m_bOutline  = m_Parameters["OUTLINE"].asBool();
        m_Pen       = wxPen(!m_bOutline ? m_pSymbology->Get_Single_Color() : SG_Get_wxColor(m_Parameters["OUTLINE_COLOR"].asColor()), !m_bOutline ? 1 : m_Parameters["OUTLINE_SIZE"].asInt(), wxPENSTYLE_SOLID);
        m_Brush     = wxBrush(m_pSymbology->Get_Single_Color(), BrushList_Get_Style("DISPLAY_BRUSH"));
 
        m_bVertices = m_Parameters["DISPLAY_POINTS"  ].asInt ();
        m_bCentroid = m_Parameters["DISPLAY_CENTROID"].asBool();
 
        //-----------------------------------------------------
        return( true );
}
 

//                                                       //
 
//---------------------------------------------------------
void CSG_Map_Shapes_Polygon::Draw_Thumbnails(CSG_Map_DC &dc_Map, int Limit)
{
        Draw_Initialize(dc_Map, LAYER_DRAW_FLAG_THUMBNAIL);
 
        CSG_Point Limits(
                dc_Map.rWorld().Get_XRange() / dc_Map.rDC().GetWidth (),
                dc_Map.rWorld().Get_YRange() / dc_Map.rDC().GetHeight()
        );
 
        if( Limit < 1 || m_pObject->asShapes()->Get_Count() <= Limit )
        {
                for(sLong i=0; i<m_pObject->asShapes()->Get_Count(); i++)
                {
                        CSG_Shape_Polygon *pPolygon = m_pObject->asShapes()->Get_Shape(i)->asPolygon();
 
                        if( pPolygon->Get_Extent().Get_XRange() > Limits.x
                        &&  pPolygon->Get_Extent().Get_YRange() > Limits.y )
                        {
                                Draw_Shape(dc_Map, pPolygon, LAYER_DRAW_FLAG_THUMBNAIL);
                        }
                        else
                        {
                                TSG_Point_Int Center = dc_Map.World2DC(pPolygon->Get_Extent().Get_Center());
 
                                dc_Map.DrawPoint(Center.x, Center.y);
                        }
                }
        }
        else
        {
                CSG_Table Size; Size.Add_Field("SIZE", SG_DATATYPE_Double); Size.Set_Count(m_pObject->asShapes()->Get_Count());
 
                for(sLong i=0; i<m_pObject->asShapes()->Get_Count(); i++)
                {
                        Size[i].Set_Value(0, m_pObject->asShapes()->Get_Shape(i)->asPolygon()->Get_Area());
                }
 
                Size.Sort(0, false);
 
                for(int i=0; i<Limit; i++)
                {
                        CSG_Shape_Polygon *pPolygon = m_pObject->asShapes()->Get_Shape(Size[i].Get_Index())->asPolygon();
 
                        if( pPolygon->Get_Extent().Get_XRange() > Limits.x
                        &&  pPolygon->Get_Extent().Get_YRange() > Limits.y )
                        {
                                Draw_Shape(dc_Map, pPolygon, LAYER_DRAW_FLAG_THUMBNAIL);
                        }
                        else
                        {
                                TSG_Point_Int Center = dc_Map.World2DC(pPolygon->Get_Extent().Get_Center());
 
                                dc_Map.DrawPoint(Center.x, Center.y);
                        }
                }
        }
}
 

//                                                       //
 
//---------------------------------------------------------
void CSG_Map_Shapes_Polygon::Draw_Initialize(CSG_Map_DC &dc_Map, int Flags)
{
        if( (Flags & LAYER_DRAW_FLAG_THUMBNAIL) == 0 && m_Parameters["BOUNDARY_EFFECT"].asBool() )
        {
                int color = m_Parameters["BOUNDARY_COLOR"].asInt(), size = m_Parameters["BOUNDARY_SIZE"].asInt() + m_Parameters["OUTLINE_SIZE"].asInt();
 
                dc_Map.SetPen(wxPen(SG_Get_wxColor(color), size, wxPENSTYLE_SOLID)); dc_Map.SetBrush(*wxTRANSPARENT_BRUSH);
 
                for(sLong i=0; i<m_pObject->asShapes()->Get_Count(); i++)
                {
                        dc_Map.Draw_Polygon(m_pObject->asShapes()->Get_Shape(i)->asPolygon());
                }
        }
 
        dc_Map.SetBrush(m_Brush); dc_Map.SetPen(m_Pen);
}
 
//---------------------------------------------------------
void CSG_Map_Shapes_Polygon::Draw_Shape(CSG_Map_DC &dc_Map, CSG_Shape *pShape, int Flags)
{
        if( (Flags & LAYER_DRAW_FLAG_SELECTION) != 0 )
        {
                dc_Map.Draw_Polygon(pShape->asPolygon());
 
                return;
        }
 
        //-----------------------------------------------------
        if( !m_Brush.IsTransparent() || m_bOutline )
        {
                int Color;
 
                if( Get_Class_Color(pShape, Color) || m_bNoData )
                {
                        m_Brush.SetColour(SG_GET_R(Color), SG_GET_G(Color), SG_GET_B(Color));
                        dc_Map.SetBrush(m_Brush);
 
                        if( !m_bOutline )
                        {
                                m_Pen.SetColour(SG_GET_R(Color), SG_GET_G(Color), SG_GET_B(Color));
                                dc_Map.SetPen(m_Pen);
                        }
 
                        dc_Map.Draw_Polygon((CSG_Shape_Polygon *)pShape);
                }
        }
 
        //-----------------------------------------------------
        if( (Flags & LAYER_DRAW_FLAG_THUMBNAIL) == 0 && m_bCentroid )
        {
                TSG_Point Point = ((CSG_Shape_Polygon *)pShape)->Get_Centroid();
 
                dc_Map.DrawCircle((int)dc_Map.xWorld2DC(Point.x), (int)dc_Map.yWorld2DC(Point.y), 2);
        }
}
 
//---------------------------------------------------------
void CSG_Map_Shapes_Polygon::Draw_Label(CSG_Map_DC &dc_Map, CSG_Shape *pShape, const wxString &Label)
{
        if( 0 )
        {
                TSG_Point_Int p = dc_Map.World2DC(((CSG_Shape_Polygon *)pShape)->Get_Centroid());
 
                dc_Map.DrawText(SG_DC_TEXTALIGN_CENTER, p.x, p.y, Label, m_Label.Effect, m_Label.Effect_Color, m_Label.Effect_Size);
        }
        else
        {
                for(int iPart=0; iPart<pShape->Get_Part_Count(); iPart++)
                {
                        if( !((CSG_Shape_Polygon *)pShape)->is_Lake(iPart) )
                        {
                                TSG_Point_Int p = dc_Map.World2DC(((CSG_Shape_Polygon *)pShape)->Get_Centroid());
 
                                dc_Map.DrawText(SG_DC_TEXTALIGN_CENTER, p.x, p.y, Label, m_Label.Effect, m_Label.Effect_Color, m_Label.Effect_Size);
                        }
                }
        }
}
 

//                                                       //
//                                                       //
//                                                       //
 
//---------------------------------------------------------