/* LICENSE BLOCK
Part of mde: a Modular D game-oriented Engine
Copyright © 2007-2008 Diggory Hardy

This program is free software: you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software Foundation, either
version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>. */

/** A simple renderer. */
module mde.gui.renderer.SimpleRenderer;

import mde.gui.renderer.IRenderer;

import gl = mde.gl.basic;

/** Interface for renderers.
*
* Renderers provide unified drawing methods for widget, e.g. to draw a window background, a frame,
* or a button. The renderer will effectively be synonymous with the theme, except that a scripted
* renderer may also be available.
*
* The renderer is intended to be per-GUI. */
class SimpleRenderer : IRenderer
{
    BorderDimensions setSizable (bool wS, bool hS) {
        wSizable = wS;
        hSizable = hS;
        
        // Set the border size based on the above
        with (border) {
            l = r = t = b = 14;
        }
        with (resize) {
            if (wSizable)
                l = r = 6;
            else
                l = r = 0;
            if (hSizable) {
                t = b = 6;
            } else
                t = b = 0;
        }
        border += resize;
        return border;
    }
    
    RESIZE_TYPE getResizeType (wdim cx, wdim cy, wdim w, wdim h) {
        RESIZE_TYPE resizeType = RESIZE_TYPE.NONE;
        if (cx < resize.l || cx >= w - resize.r ||
            cy < resize.t || cy >= h - resize.b) { // window is being resized
                /* check for resizes (different to above; use whole border giving larger area for
                * diagonal resizes). */
            
            if (wSizable) {
                if (cx < border.l)
                    resizeType = RESIZE_TYPE.L;
                else if (cx >= w - border.r)
                    resizeType = RESIZE_TYPE.R;
            }
            if (hSizable) {
                if (cy < border.t)
                    resizeType |= RESIZE_TYPE.T;
                else if (cy >= h - border.b)
                    resizeType |= RESIZE_TYPE.B;
            }
        }
        return resizeType;
    }
    
    wdim layoutSpacing () {
        return 4;
    }
    
    
    //FIXME - make these do something
    void restrict (wdim x, wdim y, wdim w, wdim h) {}
    void relax () {}
    
    void drawWindow (wdim x, wdim y, wdim w, wdim h) {
        gl.setColor (0f, 0f, .7f);
        gl.drawBox (x,y, w,h);
        
        gl.setColor (0f, 0f, 1f);
        gl.drawBox (x+resize.l, y+resize.t, w-resize.l-resize.r, h-resize.t-resize.b);
        
        gl.setColor (.3f, .3f, .3f);
        gl.drawBox (x+border.l, y+border.t, w-border.l-border.r, h-border.t-border.b);
    }

    void drawWidgetBack (wdim x, wdim y, wdim w, wdim h) {
        debug {
            gl.setColor (0f, .2f, .2f);
            gl.drawBox (x,y, w,h);
        }
    }
    
    void drawBlank (wdim x, wdim y, wdim w, wdim h) {
        gl.setColor (.4f, .4f, .4f);
        gl.drawBox (x,y, w,h);
    }
    
    void drawButton (wdim x, wdim y, wdim w, wdim h, bool pushed) {
        if (pushed)
            gl.setColor (1f, 0f, 1f);
        else
            gl.setColor (.6f, 0f, .6f);
        gl.drawBox (x,y, w,h);
    }
    
protected:
    bool wSizable, hSizable;
    BorderDimensions border;
    BorderDimensions resize;
}