ui_node_tbar.c

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/*
Copyright (C) 2002-2010 UFO: Alien Invasion.

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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#include "../ui_nodes.h"
#include "../ui_parse.h"
#include "../ui_render.h"
#include "ui_node_tbar.h"
#include "ui_node_abstractvalue.h"
#include "ui_node_abstractnode.h"

#define EXTRADATA_TYPE tbarExtraData_t
#define EXTRADATA(node) UI_EXTRADATA(node, EXTRADATA_TYPE)
#define EXTRADATACONST(node) UI_EXTRADATACONST(node, EXTRADATA_TYPE)

#define TEXTURE_WIDTH 250.0

static void UI_TBarNodeDraw (uiNode_t *node)
{
    /* dataImageOrModel is the texture name */
    float shx;
    vec2_t nodepos;
    const char* ref = UI_GetReferenceString(node, node->image);
    float pointWidth;
    float width;
    if (!ref || ref[0] == '\0')
        return;

    UI_GetNodeAbsPos(node, nodepos);

    pointWidth = TEXTURE_WIDTH / 100.0; /* relative to the texture */

    {
        float ps;
        const float min = UI_GetReferenceFloat(node, EXTRADATA(node).super.min);
        const float max = UI_GetReferenceFloat(node, EXTRADATA(node).super.max);
        float value = UI_GetReferenceFloat(node, EXTRADATA(node).super.value);
        /* clamp the value */
        if (value > max)
            value = max;
        if (value < min)
            value = min;
        ps = (value - min) / (max - min) * 100;
        shx = EXTRADATA(node).texl[0];  /* left gap to the texture */
        shx += round(ps * pointWidth); /* add size from 0..TEXTURE_WIDTH */
    }

    width = (shx * node->size[0]) / TEXTURE_WIDTH;

    UI_DrawNormImageByName(nodepos[0], nodepos[1], width, node->size[1],
        shx, EXTRADATA(node).texh[1], EXTRADATA(node).texl[0], EXTRADATA(node).texl[1], ref);
}

static const value_t properties[] = {
    /* @todo Need documentation */
    {"texh", V_POS, UI_EXTRADATA_OFFSETOF(tbarExtraData_t, texh), MEMBER_SIZEOF(tbarExtraData_t, texh)},
    /* @todo Need documentation */
    {"texl", V_POS, UI_EXTRADATA_OFFSETOF(tbarExtraData_t, texl), MEMBER_SIZEOF(tbarExtraData_t, texl)},
    {NULL, V_NULL, 0, 0}
};

void UI_RegisterTBarNode (uiBehaviour_t *behaviour)
{
    behaviour->name = "tbar";
    behaviour->extends = "abstractvalue";
    behaviour->draw = UI_TBarNodeDraw;
    behaviour->properties = properties;
    behaviour->extraDataSize = sizeof(EXTRADATA_TYPE);
}