SFML/DSFML/samples/dsfml/dfl/DFLSample.d

module dflsample;

import dsfml.system.all;
import dsfml.window.all;

// DFL and Derelict must be present.
import dfl.all;

import Derelict.opengl.gl;
import Derelict.opengl.glu;


// An enum for each controls methods
enum ControlMethod
{
    MOUSE,
    KEYBOARD
}

void main()
{
    DerelictGL.load();
    DerelictGLU.load();
    //Start the message loop
    Application.run(new MyForm());
}

//A simple form with a groupbox to choose input method and the openGL control
class MyForm : Form
{
    GLControl m_gl;
    GroupBox m_gbx;
    RadioButton m_rb1;
    RadioButton m_rb2;
    
    this()
    {
        m_gbx = new GroupBox();
        m_gbx.dock = DockStyle.TOP;
        m_gbx.height = 40;
        m_gbx.text = "Choose your input";
        this.controls.add(m_gbx);
        
        m_rb1 = new RadioButton();
        m_rb1.text = "Mouse";
        m_rb1.location = Point(10, 15);
        m_rb1.checked = true;
        m_rb1.click ~= &radioButtonClick;
        m_gbx.controls.add(m_rb1);
        
        m_rb2 = new RadioButton();
        m_rb2.text = "Keyboard";
        m_rb2.location = Point(m_rb1.width + 10, 15);
        m_rb2.click ~= &radioButtonClick;
        m_gbx.controls.add(m_rb2);
        
        m_gl = new GLControl();
        m_gl.dock = DockStyle.FILL;
        m_gl.controlMethod = ControlMethod.MOUSE;
        this.controls.add(m_gl);
        
        this.text = "DFL Opengl Integration Sample";
    }
    
    private void radioButtonClick(Control c, EventArgs ea)
    {
        m_gl.controlMethod(c.text == "Mouse" ? ControlMethod.MOUSE : ControlMethod.KEYBOARD);
        m_gl.focus();
    }
 
}

//Our OpenGL control
class GLControl : Control
{
    Window m_win;
    Input i;
    Timer m_timer;
    GLfloat rotx = 0.f, roty = 0.f;
    ControlMethod m_method = ControlMethod.MOUSE;
    
    this ()
    {
        super();
        this.setStyle(ControlStyles.SELECTABLE | ControlStyles.ALL_PAINTING_IN_WM_PAINT | ControlStyles.WANT_ALL_KEYS, true);
        
        //We set a timer to ensure periodic refresh of the window
        m_timer = new Timer();
        m_timer.interval(10);
        m_timer.tick ~= &this.onTick;
            
    }
    
    public void controlMethod(ControlMethod m)
    {
        m_method = m;
    }
    
    //Override of the onHandleCreated method of Control
    //integration of DSFML window in a control need a valid handle 
    protected void onHandleCreated(EventArgs ea)
    {
        super.onHandleCreated(ea);
        
        //Construction of the window
        m_win = new Window(cast(WindowHandle)this.handle);
        
        //Get the input for further use
        i = m_win.getInput();
        
        //Now that the Window is instanciated, we can start the timer.
        m_timer.start();
        
        //Some opengl initializations functions
        glClearDepth(1.f);
        glClearColor(0.f, 0.f, 0.f, 0.f);
        glEnable(GL_DEPTH_TEST);
        glDepthMask(GL_TRUE);
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        gluPerspective(90.f, 1.f, 1.f, 500.f);
    }

    //We handle Mouse leaving and entering the control to hide or show the cursor
    protected void onMouseEnter(MouseEventArgs mea)
    {
        super.onMouseEnter(mea);
        Cursor.current.hide();
    }
    
    protected void onMouseLeave(MouseEventArgs mea)
    {
        super.onMouseLeave(mea);
        Cursor.current.show();
    }

    //If the window is resize, we need to modify openGL view
    protected void onResize(EventArgs ea)
    {
        super.onResize(ea);
        glViewport(0, 0, this.width, this.height);
    }

    protected void onTick(Timer t, EventArgs ea)
    {
        draw();
    }

    protected void onPaint(PaintEventArgs pea)
    {
        super.onPaint(pea);
        draw();
    }

    private void handleKeys()
    {
        if (i.isKeyDown(KeyCode.UP))
         rotx += 1.f;
        if (i.isKeyDown(KeyCode.DOWN))
         rotx += -1.f;
        if (i.isKeyDown(KeyCode.LEFT))
         roty += -1.f;
        if (i.isKeyDown(KeyCode.RIGHT))
         roty += 1.f;

    }
    private void handleMousePos()
    {
        rotx = i.getMouseY() - (this.height / 2.0);
        roty = i.getMouseX() - (this.width / 2.0);
    }
    
    private void draw()
    {
        if (m_method == ControlMethod.KEYBOARD)
            handleKeys();
        else
            handleMousePos();

        m_win.setActive(true);
        
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();
        glTranslatef(0.f, 0.f, -200.f);
        glRotatef(rotx, 1.f, 0.f, 0.f);
        glRotatef(roty, 0.f, 1.f, 0.f);

        glBegin(GL_QUADS);
            glColor3f(1.f, 0.f, 0.f);
            glVertex3f(-50.f, -50.f, -50.f);
            glVertex3f(-50.f,  50.f, -50.f);
            glVertex3f( 50.f,  50.f, -50.f);
            glVertex3f( 50.f, -50.f, -50.f);
            
            glColor3f(0.f, 1.f, 0.f);
            glVertex3f(-50.f, -50.f, 50.f);
            glVertex3f(-50.f,  50.f, 50.f);
            glVertex3f( 50.f,  50.f, 50.f);
            glVertex3f( 50.f, -50.f, 50.f);
        
            glColor3f(0.f, 0.f, 1.f);
            glVertex3f(-50.f, -50.f, -50.f);
            glVertex3f(-50.f,  50.f, -50.f);
            glVertex3f(-50.f,  50.f,  50.f);
            glVertex3f(-50.f, -50.f,  50.f);
        
            glColor3f(1.f, 1.f, 0.f);
            glVertex3f(50.f, -50.f, -50.f);
            glVertex3f(50.f,  50.f, -50.f);
            glVertex3f(50.f,  50.f,  50.f);
            glVertex3f(50.f, -50.f,  50.f);
        
            glColor3f(1.f, 0.f, 1.f);
            glVertex3f(-50.f, -50.f,  50.f);
            glVertex3f(-50.f, -50.f, -50.f);
            glVertex3f( 50.f, -50.f, -50.f);
            glVertex3f( 50.f, -50.f,  50.f);
        
            glColor3f(0.f, 1.f, 1.f);
            glVertex3f(-50.f, 50.f,  50.f);
            glVertex3f(-50.f, 50.f, -50.f);
            glVertex3f( 50.f, 50.f, -50.f);
            glVertex3f( 50.f, 50.f,  50.f);        
        glEnd();
                
        m_win.display();
    }
}