AtomicGameEngine-Examples/FeatureExamples/CPlusPlus/Source/HelloWorld.cpp

//
// Copyright (c) 2008-2016 the Urho3D project.
// Copyright (c) 2014-2016, THUNDERBEAST GAMES LLC All rights reserved
//
// 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.
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#include <Atomic/Core/CoreEvents.h>
#include <Atomic/Core/ProcessUtils.h>
#include <Atomic/Input/Input.h>
#include <Atomic/Graphics/Graphics.h>
#include <Atomic/UI/UI.h>
#include <Atomic/UI/UIFontDescription.h>
#include <Atomic/UI/UIView.h>
#include <Atomic/UI/UILayout.h>
#include <Atomic/UI/UITextField.h>
#include <Atomic/Resource/ResourceCache.h>
#include <Atomic/Scene/Scene.h>

#include "FeatureExamples.h"
#include "HelloWorld.h"

#include <Atomic/DebugNew.h>

HelloWorld::HelloWorld(Context* context) :
    Sample(context)
{
}

void HelloWorld::Start()
{
    // Execute base class startup
    Sample::Start();

    // Create "Hello World" Text
    CreateText();

    // Finally subscribe to the update event. Note that by subscribing events at this point we have already missed some events
    // like the ScreenMode event sent by the Graphics subsystem when opening the application window. To catch those as well we
    // could subscribe in the constructor instead.
    SubscribeToEvents();

    // Set the mouse mode to use in the sample
    Sample::InitMouseMode(MM_FREE);
}

void HelloWorld::CreateText()
{
    ResourceCache* cache = GetSubsystem<ResourceCache>();
    Graphics* graphics = GetSubsystem<Graphics>();

    // Say Hello

    UIView* view = FeatureExamples::GetUIView();

    UILayout* layout = new UILayout(context_);
    layout->SetRect(view->GetRect());

    layout->SetLayoutPosition(UI_LAYOUT_POSITION_CENTER);
    layout->SetLayoutDistributionPosition(UI_LAYOUT_DISTRIBUTION_POSITION_CENTER);

    SharedPtr<UIFontDescription> fontDesc(new UIFontDescription(context_));
    fontDesc->SetId("Vera");
    fontDesc->SetSize(24);

    UITextField* label = new UITextField(context_);
    label->SetFontDescription(fontDesc);
    label->SetText("Hello World, from the Atomic Game Engine");
    layout->AddChild(label);

    view->AddChild(layout);
}

void HelloWorld::SubscribeToEvents()
{
    // Subscribe HandleUpdate() function for processing update events
    SubscribeToEvent(E_UPDATE, ATOMIC_HANDLER(HelloWorld, HandleUpdate));
}

void HelloWorld::HandleUpdate(StringHash eventType, VariantMap& eventData)
{
    // Do nothing for now, could be extended to eg. animate the display
}