urho3d/Source/Samples/36_Urho2DTileMap/Urho2DTileMap.h

//
// Copyright (c) 2008-2020 the Urho3D project.
//
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// of this software and associated documentation files (the "Software"), to deal
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#pragma once

#include "Sample.h"

/// Urho2D tile map example.
/// This sample demonstrates:
///     - Creating a 2D scene with tile map
///     - Displaying the scene using the Renderer subsystem
///     - Handling keyboard to move and zoom 2D camera
///     - Interacting with the tile map
class Urho2DTileMap : public Sample
{
    URHO3D_OBJECT(Urho2DTileMap, Sample);

public:
    /// Construct.
    explicit Urho2DTileMap(Context* context);

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

protected:
    /// Return XML patch instructions for screen joystick layout for a specific sample app, if any.
    String GetScreenJoystickPatchString() const override { return
        "<patch>"
        "    <remove sel=\"/element/element[./attribute[@name='Name' and @value='Button0']]/attribute[@name='Is Visible']\" />"
        "    <replace sel=\"/element/element[./attribute[@name='Name' and @value='Button0']]/element[./attribute[@name='Name' and @value='Label']]/attribute[@name='Text']/@value\">Zoom In</replace>"
        "    <add sel=\"/element/element[./attribute[@name='Name' and @value='Button0']]\">"
        "        <element type=\"Text\">"
        "            <attribute name=\"Name\" value=\"KeyBinding\" />"
        "            <attribute name=\"Text\" value=\"PAGEUP\" />"
        "        </element>"
        "    </add>"
        "    <remove sel=\"/element/element[./attribute[@name='Name' and @value='Button1']]/attribute[@name='Is Visible']\" />"
        "    <replace sel=\"/element/element[./attribute[@name='Name' and @value='Button1']]/element[./attribute[@name='Name' and @value='Label']]/attribute[@name='Text']/@value\">Zoom Out</replace>"
        "    <add sel=\"/element/element[./attribute[@name='Name' and @value='Button1']]\">"
        "        <element type=\"Text\">"
        "            <attribute name=\"Name\" value=\"KeyBinding\" />"
        "            <attribute name=\"Text\" value=\"PAGEDOWN\" />"
        "        </element>"
        "    </add>"
        "</patch>";
    }

private:
    /// Construct the scene content.
    void CreateScene();
    /// Construct an instruction text to the UI.
    void CreateInstructions();
    /// Set up a viewport for displaying the scene.
    void SetupViewport();
    /// Read input and moves the camera.
    void MoveCamera(float timeStep);
    /// Subscribe to application-wide logic update events.
    void SubscribeToEvents();
    /// Handle the logic update event.
    void HandleUpdate(StringHash eventType, VariantMap& eventData);
    /// Handle the mouse click event.
    void HandleMouseButtonDown(StringHash eventType, VariantMap& eventData);
    /// Get mouse position in 2D world coordinates.
    Vector2 GetMousePositionXY();
};