urho3d/Source/Samples/37_UIDrag/UIDrag.h

//
// Copyright (c) 2008-2017 the Urho3D project.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// THE SOFTWARE.
//

#pragma once

#include "Sample.h"

namespace Urho3D
{
    class Node;
    class Scene;
}

/// GUI test example.
/// This sample demonstrates:
///     - Creating GUI elements from C++
///     - Loading GUI Style from xml
///     - Subscribing to GUI drag events and handling them
///     - Working with GUI elements with specific tags.
class UIDrag : public Sample
{
    URHO3D_OBJECT(UIDrag, Sample);

public:
    /// Construct.
    UIDrag(Context* context);

    /// Setup after engine initialization and before running the main loop.
    virtual void Start() override;

protected:
    /// Return XML patch instructions for screen joystick layout for a specific sample app, if any.
    virtual String GetScreenJoystickPatchString() const override { return
        "<patch>"
        "    <add sel=\"/element/element[./attribute[@name='Name' and @value='Hat0']]\">"
        "        <attribute name=\"Is Visible\" value=\"false\" />"
        "    </add>"
        "</patch>";
    }

private:
    /// Construct the GUI.
    void CreateGUI();
    /// Construct an instruction text to the UI.
    void CreateInstructions();
    /// Subscribe to application-wide logic update events.
    void SubscribeToEvents();

    void HandleUpdate(StringHash eventType, VariantMap& eventData);
    void HandleDragBegin(StringHash eventType, VariantMap& eventData);
    void HandleDragMove(StringHash eventType, VariantMap& eventData);
    void HandleDragCancel(StringHash eventType, VariantMap& eventData);
    void HandleDragEnd(StringHash eventType, VariantMap& eventData);
    void HandleTextFinished(StringHash eventType, VariantMap& eventData);
    void HandleLineEditDragBegin(StringHash eventType, VariantMap& eventData);
};