NazaraEngine/examples/WidgetDemo/main.cpp

#include <Nazara/Core.hpp>
#include <Nazara/Core/Systems.hpp>
#include <Nazara/Platform.hpp>
#include <Nazara/Graphics.hpp>
#include <Nazara/Graphics/TextSprite.hpp>
#include <Nazara/Graphics/Components.hpp>
#include <Nazara/Graphics/Systems.hpp>
#include <Nazara/Math/PidController.hpp>
#include <Nazara/Physics3D.hpp>
#include <Nazara/Physics3D/Components.hpp>
#include <Nazara/Physics3D/Systems.hpp>
#include <Nazara/Renderer.hpp>
#include <Nazara/Utility.hpp>
#include <Nazara/Utility/Components.hpp>
#include <Nazara/Widgets.hpp>
#include <Nazara/Widgets/ImageButtonWidget.hpp>
#include <Nazara/Widgets/ScrollAreaWidget.hpp>
#include <entt/entt.hpp>
#include <array>
#include <iostream>
#include <limits>

NAZARA_REQUEST_DEDICATED_GPU()

int main()
{
	std::filesystem::path resourceDir = "assets/examples";
	if (!std::filesystem::is_directory(resourceDir) && std::filesystem::is_directory("../.." / resourceDir))
		resourceDir = "../.." / resourceDir;

	Nz::Renderer::Config rendererConfig;
	std::cout << "Run using Vulkan? (y/n)" << std::endl;
	if (std::getchar() != 'n')
		rendererConfig.preferredAPI = Nz::RenderAPI::Vulkan;
	else
		rendererConfig.preferredAPI = Nz::RenderAPI::OpenGL;

	std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');

	Nz::Modules<Nz::Graphics, Nz::Physics3D, Nz::Widgets> nazara(rendererConfig);

	std::shared_ptr<Nz::RenderDevice> device = Nz::Graphics::Instance()->GetRenderDevice();

	std::string windowTitle = "Widget Test";

	entt::registry registry;
	Nz::SystemGraph systemGraph(registry);
	Nz::RenderSystem& renderSystem = systemGraph.AddSystem<Nz::RenderSystem>();
	Nz::RenderWindow& mainWindow = renderSystem.CreateWindow(device, Nz::VideoMode(1920, 1080), windowTitle);

	Nz::Canvas canvas2D(registry, mainWindow.GetEventHandler(), mainWindow.GetCursorController().CreateHandle(), 0xFFFFFFFF);
	canvas2D.Resize(Nz::Vector2f(mainWindow.GetSize()));

	Nz::LabelWidget* labelWidget = canvas2D.Add<Nz::LabelWidget>();
	labelWidget->SetPosition(0.f, 200.f, 0.f);
	labelWidget->UpdateText(Nz::SimpleTextDrawer::Draw("Je suis un LabelWidget !", 72));

	unsigned int clickCount = 0;

	Nz::ButtonWidget* buttonWidget = canvas2D.Add<Nz::ButtonWidget>();
	buttonWidget->SetPosition(200.f, 400.f);
	buttonWidget->UpdateText(Nz::SimpleTextDrawer::Draw("Press me senpai", 72));
	buttonWidget->Resize(buttonWidget->GetPreferredSize());
	buttonWidget->OnButtonTrigger.Connect([&](const Nz::ButtonWidget*)
	{
		labelWidget->UpdateText(Nz::SimpleTextDrawer::Draw("You clicked the button " + std::to_string(++clickCount) + " times", 72));
	});

	std::shared_ptr<Nz::Material> material = std::make_shared<Nz::Material>();

	std::shared_ptr<Nz::MaterialPass> materialPass = std::make_shared<Nz::MaterialPass>(Nz::BasicMaterial::GetSettings());
	material->AddPass("ForwardPass", materialPass);

	Nz::TextureSamplerInfo samplerInfo;
	samplerInfo.anisotropyLevel = 8;

	Nz::TextureParams texParams;
	texParams.renderDevice = device;
	texParams.loadFormat = Nz::PixelFormat::RGBA8_SRGB;

	Nz::BasicMaterial basicMat(*materialPass);
	basicMat.SetBaseColorMap(Nz::Texture::LoadFromFile(resourceDir / "Spaceship/Texture/diffuse.png", texParams));
	basicMat.SetBaseColorSampler(samplerInfo);

	Nz::ImageWidget* imageWidget = canvas2D.Add<Nz::ImageWidget>(material);
	imageWidget->SetPosition(1200.f, 200.f);
	imageWidget->Resize(imageWidget->GetPreferredSize() / 4.f);

	Nz::ImageButtonWidget* imageButtonWidget = canvas2D.Add<Nz::ImageButtonWidget>(material);
	imageButtonWidget->SetPosition(1400, 500.f);
	imageButtonWidget->Resize(imageButtonWidget->GetPreferredSize() / 4.f);

	Nz::TextAreaWidget* textAreaWidget = canvas2D.Add<Nz::TextAreaWidget>();
	textAreaWidget->SetPosition(800.f, 500.f);
	textAreaWidget->SetText("Je suis un TextAreaWidget !");
	textAreaWidget->Resize(Nz::Vector2f(400.f, textAreaWidget->GetPreferredHeight() * 5.f));
	textAreaWidget->SetBackgroundColor(Nz::Color::White);
	textAreaWidget->SetTextColor(Nz::Color::Black);
	textAreaWidget->EnableMultiline(true);

	Nz::CheckboxWidget* checkboxWidget = canvas2D.Add<Nz::CheckboxWidget>();
	//checkboxWidget->EnableTristate(true);
	checkboxWidget->SetPosition(800.f, 800.f);
	checkboxWidget->Resize({ 256.f, 256 });
	checkboxWidget->SetState(true);

	Nz::TextAreaWidget* longTextArea = canvas2D.Add<Nz::TextAreaWidget>();
	longTextArea->EnableLineWrap(true);
	longTextArea->EnableMultiline(true);
	longTextArea->SetBackgroundColor(Nz::Color::White);
	longTextArea->SetTextColor(Nz::Color::Black);
	longTextArea->SetText("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum");
	
	Nz::ScrollAreaWidget* scrollBarWidget = canvas2D.Add<Nz::ScrollAreaWidget>(longTextArea);
	scrollBarWidget->SetPosition(1400.f, 800.f);
	scrollBarWidget->Resize({ 512.f, 256.f });

	/*Nz::TextAreaWidget* textAreaWidget2 = canvas2D.Add<Nz::TextAreaWidget>();
	textAreaWidget2->SetPosition(800.f, 700.f);
	textAreaWidget2->SetText("Je suis un autre TextAreaWidget !");
	textAreaWidget2->Resize(Nz::Vector2f(500.f, textAreaWidget2->GetPreferredHeight()));
	textAreaWidget2->SetBackgroundColor(Nz::Color::White);
	textAreaWidget2->SetTextColor(Nz::Color::Black);*/

	entt::entity viewer2D = registry.create();
	{
		registry.emplace<Nz::NodeComponent>(viewer2D);
		auto& cameraComponent = registry.emplace<Nz::CameraComponent>(viewer2D, mainWindow.GetRenderTarget(), Nz::ProjectionType::Orthographic);
		cameraComponent.UpdateClearColor(Nz::Color(0.678f, 0.847f, 0.9f, 1.f));
	}

	mainWindow.EnableEventPolling(true);

	Nz::Clock updateClock;
	Nz::Clock secondClock;
	unsigned int fps = 0;

	float elapsedTime = 0.f;
	Nz::UInt64 time = Nz::GetElapsedMicroseconds();

	while (mainWindow.IsOpen())
	{
		Nz::UInt64 now = Nz::GetElapsedMicroseconds();
		elapsedTime = (now - time) / 1'000'000.f;
		time = now;

		Nz::WindowEvent event;
		while (mainWindow.PollEvent(&event))
		{
			switch (event.type)
			{
				case Nz::WindowEventType::Quit:
					mainWindow.Close();
					break;

				default:
					break;
			}
		}

		systemGraph.Update();

		fps++;

		if (secondClock.GetMilliseconds() >= 1000)
		{
			mainWindow.SetTitle(windowTitle + " - " + Nz::NumberToString(fps) + " FPS" + " - " + Nz::NumberToString(registry.alive()) + " entities");

			fps = 0;

			secondClock.Restart();
		}
	}

	return EXIT_SUCCESS;
}