Example: Many different widgets

This example was written to demonstrate most widgets, but many new widgets and features have been added since this example was created. Widget and text sizes are also not very consistent in this example.
Scalable login screen output

#include <iostream>

bool runExample(tgui::BackendGui& gui)
{
    try
    {
        tgui::Theme theme{"../../themes/Black.txt"};

        gui.add(tgui::Picture::create("../RedBackground.jpg"));

        auto tabs = tgui::Tabs::create();
        tabs->setRenderer(theme.getRenderer("Tabs"));
        tabs->setTabHeight(30);
        tabs->setPosition(70, 40);
        tabs->add("Tab - 1");
        tabs->add("Tab - 2");
        tabs->add("Tab - 3");
        gui.add(tabs);

        auto menu = tgui::MenuBar::create();
        menu->setRenderer(theme.getRenderer("MenuBar"));
        menu->setHeight(22.f);
        menu->addMenu("File");
        menu->addMenuItem("Load");
        menu->addMenuItem("Save");
        menu->addMenuItem("Exit");
        menu->addMenu("Edit");
        menu->addMenuItem("Copy");
        menu->addMenuItem("Paste");
        menu->addMenu("Help");
        menu->addMenuItem("About");
        gui.add(menu);

        auto label = tgui::Label::create();
        label->setRenderer(theme.getRenderer("Label"));
        label->setText("This is a label.\nAnd these are radio buttons:");
        label->setPosition(10, 90);
        label->setTextSize(18);
        gui.add(label);

        auto radioButton = tgui::RadioButton::create();
        radioButton->setRenderer(theme.getRenderer("RadioButton"));
        radioButton->setPosition(20, 140);
        radioButton->setText("Yep!");
        radioButton->setSize(25, 25);
        gui.add(radioButton);

        radioButton = tgui::RadioButton::create();
        radioButton->setRenderer(theme.getRenderer("RadioButton"));
        radioButton->setPosition(20, 170);
        radioButton->setText("Nope!");
        radioButton->setSize(25, 25);
        gui.add(radioButton);

        radioButton = tgui::RadioButton::create();
        radioButton->setRenderer(theme.getRenderer("RadioButton"));
        radioButton->setPosition(20, 200);
        radioButton->setText("Don't know!");
        radioButton->setSize(25, 25);
        gui.add(radioButton);

        label = tgui::Label::create();
        label->setRenderer(theme.getRenderer("Label"));
        label->setText("We've got some edit boxes:");
        label->setPosition(10, 240);
        label->setTextSize(18);
        gui.add(label);

        auto editBox = tgui::EditBox::create();
        editBox->setRenderer(theme.getRenderer("EditBox"));
        editBox->setSize(200, 25);
        editBox->setTextSize(18);
        editBox->setPosition(10, 270);
        editBox->setDefaultText("Click to edit text...");
        gui.add(editBox);

        label = tgui::Label::create();
        label->setRenderer(theme.getRenderer("Label"));
        label->setText("And some list boxes too...");
        label->setPosition(10, 310);
        label->setTextSize(18);
        gui.add(label);

        auto listBox = tgui::ListBox::create();
        listBox->setRenderer(theme.getRenderer("ListBox"));
        listBox->setSize(250, 120);
        listBox->setItemHeight(24);
        listBox->setPosition(10, 340);
        listBox->addItem("Item 1");
        listBox->addItem("Item 2");
        listBox->addItem("Item 3");
        gui.add(listBox);

        label = tgui::Label::create();
        label->setRenderer(theme.getRenderer("Label"));
        label->setText("It's the progress bar below");
        label->setPosition(10, 470);
        label->setTextSize(18);
        gui.add(label);

        auto progressBar = tgui::ProgressBar::create();
        progressBar->setRenderer(theme.getRenderer("ProgressBar"));
        progressBar->setPosition(10, 500);
        progressBar->setSize(200, 20);
        progressBar->setValue(50);
        gui.add(progressBar);

        label = tgui::Label::create();
        label->setRenderer(theme.getRenderer("Label"));
        label->setText(tgui::String::fromNumber(progressBar->getValue()) + "%");
        label->setPosition(220, 500);
        label->setTextSize(18);
        gui.add(label);

        label = tgui::Label::create();
        label->setRenderer(theme.getRenderer("Label"));
        label->setText("That's the slider");
        label->setPosition(10, 530);
        label->setTextSize(18);
        gui.add(label);

        auto slider = tgui::Slider::create();
        slider->setRenderer(theme.getRenderer("Slider"));
        slider->setPosition(10, 560);
        slider->setSize(200, 18);
        slider->setValue(4);
        gui.add(slider);

        auto scrollbar = tgui::Scrollbar::create();
        scrollbar->setRenderer(theme.getRenderer("Scrollbar"));
        scrollbar->setPosition(380, 40);
        scrollbar->setSize(18, 540);
        scrollbar->setMaximum(100);
        scrollbar->setViewportSize(70);
        gui.add(scrollbar);

        auto comboBox = tgui::ComboBox::create();
        comboBox->setRenderer(theme.getRenderer("ComboBox"));
        comboBox->setSize(120, 21);
        comboBox->setPosition(420, 40);
        comboBox->addItem("Item 1");
        comboBox->addItem("Item 2");
        comboBox->addItem("Item 3");
        comboBox->setSelectedItem("Item 2");
        gui.add(comboBox);

        auto child = tgui::ChildWindow::create();
        child->setRenderer(theme.getRenderer("ChildWindow"));
        child->setClientSize({250, 120});
        child->setPosition(420, 80);
        child->setTitle("Child window");
        gui.add(child);

        label = tgui::Label::create();
        label->setRenderer(theme.getRenderer("Label"));
        label->setText("Hi! I'm a child window.");
        label->setPosition(30, 30);
        label->setTextSize(15);
        child->add(label);

        auto button = tgui::Button::create();
        button->setRenderer(theme.getRenderer("Button"));
        button->setPosition(75, 70);
        button->setText("OK");
        button->setSize(100, 30);
        button->onPress([=]{ child->setVisible(false); });
        child->add(button);

        auto checkbox = tgui::CheckBox::create();
        checkbox->setRenderer(theme.getRenderer("CheckBox"));
        checkbox->setPosition(420, 240);
        checkbox->setText("Ok, I got it");
        checkbox->setSize(25, 25);
        gui.add(checkbox);

        checkbox = tgui::CheckBox::create();
        checkbox->setRenderer(theme.getRenderer("CheckBox"));
        checkbox->setPosition(570, 240);
        checkbox->setText("No, I didn't");
        checkbox->setSize(25, 25);
        gui.add(checkbox);

        label = tgui::Label::create();
        label->setRenderer(theme.getRenderer("Label"));
        label->setText("Chatbox");
        label->setPosition(420, 280);
        label->setTextSize(18);
        gui.add(label);

        auto chatbox = tgui::ChatBox::create();
        chatbox->setRenderer(theme.getRenderer("ChatBox"));
        chatbox->setSize(300, 100);
        chatbox->setTextSize(18);
        chatbox->setPosition(420, 310);
        chatbox->setLinesStartFromTop();
        chatbox->addLine("texus: Hey, this is TGUI!", tgui::Color::Green);
        chatbox->addLine("Me: Looks awesome! ;)", tgui::Color::Yellow);
        chatbox->addLine("texus: Thanks! :)", tgui::Color::Green);
        chatbox->addLine("Me: The widgets rock ^^", tgui::Color::Yellow);
        gui.add(chatbox);

        sf::Texture texture;
        sf::Sprite  sprite;
        texture.loadFromFile("../ThinkLinux.jpg");
        sprite.setTexture(texture);
        sprite.setScale(200.f / texture.getSize().x, 140.f / texture.getSize().y);

        auto canvas = tgui::Canvas::create({200, 140});
        canvas->setPosition(420, 430);
        canvas->clear();
        canvas->draw(sprite);
        canvas->display();
        gui.add(canvas);

        button = tgui::Button::create();
        button->setRenderer(theme.getRenderer("Button"));
        button->setPosition(gui.getView().getSize().x - 115.f, gui.getView().getSize().y - 50.f);
        button->setText("Exit");
        button->setSize(100, 40);
        gui.add(button);
    }
    catch (const tgui::Exception& e)
    {
        std::cerr << "TGUI Exception: " << e.what() << std::endl;
        return false;
    }

    return true;
}