create/src/Mod/TechDraw/App/DrawViewDraft.cpp

/***************************************************************************
 *   Copyright (c) 2016 WandererFan <wandererfan@gmail.com>                *
 *                                                                         *
 *   This file is part of the FreeCAD CAx development system.              *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Library General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2 of the License, or (at your option) any later version.      *
 *                                                                         *
 *   This library  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 Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this library; see the file COPYING.LIB. If not,    *
 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
 *                                                                         *
 ***************************************************************************/

#include "PreCompiled.h"

#ifndef _PreComp_
# include <iomanip>
# include <sstream>
#endif

#include <Base/Console.h>
#include <Base/Interpreter.h>

#include "DrawViewDraft.h"


using namespace TechDraw;

//===========================================================================
// DrawViewDraft
//===========================================================================

PROPERTY_SOURCE(TechDraw::DrawViewDraft, TechDraw::DrawViewSymbol)


DrawViewDraft::DrawViewDraft()
{
    static const char *group = "Draft view";

    ADD_PROPERTY_TYPE(Source ,(nullptr), group, App::Prop_None, "Draft object for this view");
    Source.setScope(App::LinkScope::Global);
    ADD_PROPERTY_TYPE(LineWidth, (0.35), group, App::Prop_None, "Line width of this view. If Override Style is false, this value multiplies the object line width");
    ADD_PROPERTY_TYPE(FontSize, (12.0), group, App::Prop_None, "Text size for this view");
    ADD_PROPERTY_TYPE(Direction ,(0, 0,1.0), group, App::Prop_None, "Projection direction. The direction you are looking from.");
    ADD_PROPERTY_TYPE(Color, (0.0f, 0.0f, 0.0f), group, App::Prop_None, "The default color of text and lines");
    ADD_PROPERTY_TYPE(LineStyle, ("Solid") ,group, App::Prop_None, "A line style to use for this view. Can be Solid, Dashed, Dashdot, Dot or a SVG pattern like 0.20, 0.20");
    ADD_PROPERTY_TYPE(LineSpacing, (1.0f), group, App::Prop_None, "The spacing between lines to use for multiline texts");
    ADD_PROPERTY_TYPE(OverrideStyle, (false), group, App::Prop_None, "If True, line color, width and style of this view will override those of rendered objects");
    ScaleType.setValue("Custom");
}

short DrawViewDraft::mustExecute() const
{
    if (!isRestoring()) {
        if(Source.isTouched() ||
            LineWidth.isTouched() ||
            FontSize.isTouched() ||
            Direction.isTouched() ||
            Color.isTouched() ||
            LineStyle.isTouched() ||
            LineSpacing.isTouched() ||
            OverrideStyle.isTouched()) {
            return true;
        }
    }
    return DrawViewSymbol::mustExecute();
}



App::DocumentObjectExecReturn *DrawViewDraft::execute()
{
//    Base::Console().Message("DVDr::execute() \n");
    if (!keepUpdated()) {
        return App::DocumentObject::StdReturn;
    }

    App::DocumentObject* sourceObj = Source.getValue();
    if (sourceObj) {
        std::string svgFrag;
        std::string svgHead = getSVGHead();
        std::string svgTail = getSVGTail();
        std::string FeatName = getNameInDocument();
        std::string SourceName = sourceObj->getNameInDocument();
        // Draft.get_svg(obj, scale=1, linewidth=0.35, fontsize=12, fillstyle="shape color", direction=None, linestyle=None, color=None, linespacing=None, techdraw=False)

        std::stringstream paramStr;
        App::Color col = Color.getValue();
        paramStr << ", scale=" << getScale()
                 << ", linewidth=" << LineWidth.getValue()
                 << ", fontsize=" << FontSize.getValue()
                 // TODO treat fillstyle here
                 << ", direction=FreeCAD.Vector(" << Direction.getValue().x << ", " << Direction.getValue().y << ", " << Direction.getValue().z << ")"
                 << ", linestyle=\"" << LineStyle.getValue() << "\""
                 << ", color=\"" << col.asHexString() << "\""
                 << ", linespacing=" << LineSpacing.getValue()
                 // We must set techdraw to "true" becausea couple of things behave differently than in Drawing
                 << ", techdraw=True"
                 << ", override=" << (OverrideStyle.getValue() ? "True" : "False");

// this is ok for a starting point, but should eventually make dedicated Draft functions that build the svg for all the special cases
// (Arch section, etc)
// like Draft.makeDrawingView, but we don't need to create the actual document objects in Draft, just the svg.
        Base::Interpreter().runString("import Draft");
        Base::Interpreter().runStringArg("svgBody = Draft.get_svg(App.activeDocument().%s %s)",
                                         SourceName.c_str(), paramStr.str().c_str());
//        Base::Interpreter().runString("print svgBody");
        Base::Interpreter().runStringArg("App.activeDocument().%s.Symbol = '%s' + svgBody + '%s'",
                                          FeatName.c_str(), svgHead.c_str(), svgTail.c_str());
        }

    overrideKeepUpdated(false);
    return DrawView::execute();
}

std::string DrawViewDraft::getSVGHead()
{
    return std::string("<svg\\n") +
           std::string("	xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\"\\n") +
           std::string("	xmlns:freecad=\"https://www.freecad.org/wiki/index.php?title=Svg_Namespace\">\\n");
}

std::string DrawViewDraft::getSVGTail()
{
    return "\\n</svg>";
}

// Python Drawing feature ---------------------------------------------------------

namespace App {
/// @cond DOXERR
PROPERTY_SOURCE_TEMPLATE(TechDraw::DrawViewDraftPython, TechDraw::DrawViewDraft)
template<> const char* TechDraw::DrawViewDraftPython::getViewProviderName() const {
    return "TechDrawGui::ViewProviderDraft";
}
/// @endcond

// explicit template instantiation
template class TechDrawExport FeaturePythonT<TechDraw::DrawViewDraft>;
}