/* 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/>. */

/** Widget decoration / rendering code. */
module mde.gui.decoration;

import gl = mde.gl.basic;

enum TypeFlags
{
    NONE = 0,
    LAYOUT = 0x10,
    BUTTON = 0x20
}

/** An attempt at unifying and generally improving apon the looks of Widgets.
*
* Probably only a stop-gap measure until something better turns up...
* Although this could be extended to do the actual rendering, etc.? */
class WidgetDecoration {
    /** Create a decoration for a window. */
    this () {
        border = 20;
        r = g = 0.0f;
        b = 1.0f;
    }
    
    /** Create an appropriate decoration for a Widget. Pass parent. */
    this (WidgetDecoration parent, TypeFlags flags = TypeFlags.NONE)
    in {
        assert (parent !is null, "WidgetDecoration: parent is null");
    } body {
        //depth = parent.depth + 1;
        
        if (flags & TypeFlags.LAYOUT) {
            if (!(parent.flags & TypeFlags.LAYOUT)) border = 4;
            r = g = b = 1f;
        } else if (flags & TypeFlags.BUTTON) {
            r = b = .6f;
            g = 0f;
        } else {
            r = 1.0f;
            g = b = 0f; //cast(float) depth % 2;
        }
        this.flags = flags;
    }
    
    void setColor () {
        gl.setColor (r,g,b);
    }
    
final:
    int border;     // width of border
private:
    float r,g,b;    // colour
    //int depth;      // Window's WidgetDecoration has depth 0; each generation is one step deeper
    TypeFlags flags;// used by children
}