OpenSpace/modules/onscreengui/src/guiorigincomponent.cpp

/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2017                                                               *
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#include <modules/onscreengui/include/guiorigincomponent.h>

#include <openspace/engine/openspaceengine.h>
#include <openspace/interaction/interactionhandler.h>
#include <openspace/rendering/renderengine.h>
#include <openspace/scene/scenegraphnode.h>
#include <openspace/scene/scene.h>

#include <ghoul/misc/assert.h>

#include "imgui.h"

namespace openspace {
namespace gui {

GuiOriginComponent::GuiOriginComponent()
    : GuiComponent("Origin")
{}

void GuiOriginComponent::render() {
    SceneGraphNode* currentFocus = OsEng.interactionHandler().focusNode();

    std::vector<SceneGraphNode*> nodes =
        OsEng.renderEngine().scene()->allSceneGraphNodes();

    std::sort(
        nodes.begin(),
        nodes.end(),
        [](SceneGraphNode* lhs, SceneGraphNode* rhs) {
            return lhs->name() < rhs->name();
        }
    );
    std::string nodeNames = "";
    for (SceneGraphNode* n : nodes) {
        nodeNames += n->name() + '\0';
    }

    auto iCurrentFocus = std::find(nodes.begin(), nodes.end(), currentFocus);
    if (!nodes.empty()) {
        // Only check if we found the current focus node if we have any nodes at all
        // only then it would be a real error
        ghoul_assert(iCurrentFocus != nodes.end(), "Focus node not found");
    }
    int currentPosition = static_cast<int>(std::distance(iCurrentFocus, nodes.begin()));

    bool hasChanged = ImGui::Combo("Origin", &currentPosition, nodeNames.c_str());
    if (hasChanged) {
        OsEng.scriptEngine().queueScript(
            "openspace.setPropertyValue('Interaction.origin', '" +
            nodes[currentPosition]->name() + "');",
            scripting::ScriptEngine::RemoteScripting::Yes
        );
    }
}

} // gui
} // openspace