ui_node_radiobutton.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_main.h"
#include "../ui_actions.h"
#include "../ui_icon.h"
#include "../ui_parse.h"
#include "../ui_input.h"
#include "../ui_render.h"
#include "ui_node_radiobutton.h"
#include "ui_node_abstractnode.h"

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

#define EPSILON 0.001f

#define UI_4STATUS_TEX_HEIGHT 64

static void UI_RadioButtonNodeDraw (uiNode_t *node)
{
    vec2_t pos;
    uiIconStatus_t iconStatus;
    const float current = UI_GetReferenceFloat(node, EXTRADATA(node).cvar);
    const qboolean disabled = node->disabled || node->parent->disabled;
    int texY;
    const char *image;

    if (disabled) {
        iconStatus = ICON_STATUS_DISABLED;
        texY = UI_4STATUS_TEX_HEIGHT * 2;
    } else if (current > EXTRADATA(node).value - EPSILON && current < EXTRADATA(node).value + EPSILON) {
        iconStatus = ICON_STATUS_CLICKED;
        texY = UI_4STATUS_TEX_HEIGHT * 3;
    } else if (node->state) {
        iconStatus = ICON_STATUS_HOVER;
        texY = UI_4STATUS_TEX_HEIGHT;
    } else {
        iconStatus = ICON_STATUS_NORMAL;
        texY = 0;
    }

    UI_GetNodeAbsPos(node, pos);

    image = UI_GetReferenceString(node, node->image);
    if (image) {
        const int texX = 0;
        UI_DrawNormImageByName(pos[0], pos[1], node->size[0], node->size[1],
            texX + node->size[0], texY + node->size[1], texX, texY, image);
    }

    if (EXTRADATA(node).icon) {
        UI_DrawIconInBox(EXTRADATA(node).icon, iconStatus, pos[0], pos[1], node->size[0], node->size[1]);
    }
}

static void UI_RadioButtonNodeActivate (uiNode_t * node)
{
    float current;

    /* no cvar given? */
    if (!EXTRADATA(node).cvar || !*(char*)(EXTRADATA(node).cvar)) {
        Com_Printf("UI_RadioButtonNodeClick: node '%s' doesn't have a valid cvar assigned\n", UI_GetPath(node));
        return;
    }

    /* its not a cvar! */
    if (strncmp((const char *)(EXTRADATA(node).cvar), "*cvar", 5))
        return;

    current = UI_GetReferenceFloat(node, EXTRADATA(node).cvar);
    /* Is we click on the action button, we can continue */
    if (current > EXTRADATA(node).value - EPSILON && current < EXTRADATA(node).value + EPSILON)
        return;

    {
        const char *cvarName = &((const char *)(EXTRADATA(node).cvar))[6];
        UI_SetCvar(cvarName, NULL, EXTRADATA(node).value);
        if (node->onChange)
            UI_ExecuteEventActions(node, node->onChange);
    }
}

static void UI_RadioButtonNodeClick (uiNode_t * node, int x, int y)
{
    if (node->onClick)
        UI_ExecuteEventActions(node, node->onClick);

    UI_RadioButtonNodeActivate(node);
}

static const value_t properties[] = {
    /* Value defining the radiobutton. Cvar is updated with this value when the radio button is selected. */
    {"value", V_FLOAT, UI_EXTRADATA_OFFSETOF(EXTRADATA_TYPE, value), MEMBER_SIZEOF(EXTRADATA_TYPE, value)},
    /* Cvar name shared with the radio button group to identify when a radio button is selected. */
    {"cvar", V_UI_CVAR, UI_EXTRADATA_OFFSETOF(EXTRADATA_TYPE, cvar), 0},
    /* Icon used to display the node */
    {"icon", V_UI_ICONREF, UI_EXTRADATA_OFFSETOF(EXTRADATA_TYPE, icon), MEMBER_SIZEOF(EXTRADATA_TYPE, icon)},

    {NULL, V_NULL, 0, 0}
};

void UI_RegisterRadioButtonNode (uiBehaviour_t *behaviour)
{
    behaviour->name = "radiobutton";
    behaviour->draw = UI_RadioButtonNodeDraw;
    behaviour->leftClick = UI_RadioButtonNodeClick;
    behaviour->activate = UI_RadioButtonNodeActivate;
    behaviour->properties = properties;
    behaviour->extraDataSize = sizeof(EXTRADATA_TYPE);
}