UiScene.h

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// UiScene.h
//
// Copyright (c) 2013-2015 Michael Imamura.
//
// Licensed under GrokkSoft HoverRace SourceCode License v1.0(the "License");
// you may not use this file except in compliance with the License.
//
// A copy of the license should have been attached to the package from which
// you have taken this file. If you can not find the license you can not use
// this file.
//
//
// The author makes no representations about the suitability of
// this software for any purpose.  It is provided "as is" "AS IS",
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied.
//
// See the License for the specific language governing permissions
// and limitations under the License.

#pragma once

#include "Scene.h"

namespace HoverRace {
    namespace Control {
        class Nav;
    }
    namespace Display {
        class UiViewModel;
    }
}

namespace HoverRace {
namespace Client {

class UiScene : public Scene
{
    using SUPER = Scene;

public:
    UiScene(const std::string &name = "") :
        SUPER(name), needsLayout(true) { }
    virtual ~UiScene() { }

public:
    bool IsMouseCursorEnabled() const override { return true; }

public:
    void AttachController(Control::InputEventController &controller,
        ConnList &conns) override;
    void DetachController(Control::InputEventController&,
        ConnList&) override { }

private:
    void OnAction();
    void OnNav(Control::Nav &nav);

protected:
    void SetFocusRoot(std::shared_ptr<Display::UiViewModel> root);

    void RequestLayout() { needsLayout = true; }

    virtual void Layout() { }

public:
    void PrepareRender() override
    {
        if (needsLayout) {
            Layout();
            needsLayout = false;
        }
    }

    void Render() override { }

private:
    bool needsLayout;

    std::shared_ptr<Display::UiViewModel> focusRoot;
    boost::signals2::scoped_connection focusReqConn;
    boost::signals2::scoped_connection focusRelConn;
};

}  // namespace Client
}  // namespace HoverRace