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C-/C++-Quelltext

#pragma once

#include <SFML\Graphics.hpp>
#include <string>

enum TextAlign
{
    CENTER = 1,
    LEFT,
    RIGHT,
};

class MainWindow
{
protected:
    sf::RenderWindow *app;

public:
    //Ein Fenster erstellen
    MainWindow(int w, int h, int bpx, std::string const& title);

    //Main-Loop des Programms
    virtual void mainLoop() = 0;

    //Text im Fenster ausrichten
    sf::String alignText(std::string const& text, int align, int top = 0, int margin = 0);
};

C-/C++-Quelltext

#include "MainWindow.h"

MainWindow::MainWindow(int w, int h, int bpx, const std::string &title)
{
    app = new sf::RenderWindow(sf::VideoMode(w, h, bpx), title);
}

sf::String MainWindow::alignText(std::string const& text, int align, int top, int margin)
{
    sf::String txt(text);
    int txtWidth = static_cast<int>(txt.GetRect().GetWidth());

    switch(align)
    {
    case CENTER:
        {
            int x = (app->GetWidth() - txtWidth) / 2 + margin;
            txt.Move(x, top);
        }
    case LEFT:
        {
            txt.Move(margin, top);
        }
    case RIGHT:
        {
            int x = app->GetWidth() - txtWidth - margin;
            txt.Move(x, top);
        }
    default:
        {
            txt.Move(margin, top);
        }
    }

    return txt;
}

C-/C++-Quelltext

#pragma once
#include "MainWindow.h"

class TestApp : public MainWindow
{
public:
    TestApp(int w, int h, int bpx, std::string const& title) :
      MainWindow(w, h, bpx, title)
    {
        mainLoop();
    };

    void mainLoop();
};

C-/C++-Quelltext

#include "TestApp.h"

void TestApp::mainLoop()
{
    while(app->IsOpened())
    {
        sf::Event ev;
        while(app->GetEvent(ev))
        {
            switch(ev.Type)
            {
            case sf::Event::Closed:
                app->Close();
            }
        }

        sf::String str = alignText("Hallo, Welt!", CENTER, 10);
        str.SetColor(sf::Color(128, 128, 0));

        app->Clear(sf::Color(255, 255, 255));
        app->Draw(str);
        app->Display();
    }
}

C-/C++-Quelltext

#include "TestApp.h"

int main()
{
    TestApp test(640, 480, 32, "Hallo, Welt!");
}

C-/C++-Quelltext

sf::String MainWindow::alignText(std::string const& text, int align, float top, float margin)
{
    sf::String txt(text);
    float txtWidth = txt.GetRect().GetWidth();

    switch(align)
    {
    case CENTER:
        {
            float x = (app->GetWidth() - txtWidth) / 2 + margin;
            txt.SetPosition(x, top);
        }
    case LEFT:
        {
            txt.SetPosition(margin, top);
        }
    case RIGHT:
        {
            float x = app->GetWidth() - txtWidth - margin;
            txt.SetPosition(x, top);
        }
    default:
        {
            txt.SetPosition(margin, top);
        }
    }

    return txt;
}