ui_tooltip.cpp

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/*
Copyright (C) 2002-2020 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 "../cl_shared.h"
#include "../input/cl_keys.h"
#include "node/ui_node_window.h"
#include "ui_tooltip.h"
#include "ui_nodes.h"
#include "ui_parse.h"
#include "ui_render.h"
#include "ui_input.h"

static const vec4_t tooltipBG = { 0.0f, 0.0f, 0.0f, 0.7f };
static const vec4_t tooltipColor = { 1.0f, 1.0f, 1.0f, 1.0f };

int UI_DrawTooltip (const char* string, int x, int y, int maxWidth)
{
    const char* font = "f_small";
    int height = 0, width = 0;

    if (Q_strnull(string) || !font)
        return 0;

    R_FontTextSize(font, string, maxWidth, LONGLINES_WRAP, &width, &height, nullptr, nullptr);

    if (!width)
        return 0;

    x += 5;
    y += 5;

    if (x + width + 3 > VID_NORM_WIDTH)
        x -= width + 10;

    if (y + height + 3 > VID_NORM_HEIGHT)
        y -= height + 10;

    UI_DrawFill(x - 1, y - 1, width + 4, height + 4, tooltipBG);
    R_Color(tooltipColor);
    UI_DrawString(font, ALIGN_UL, x + 1, y + 1, x + 1, maxWidth, 0, string);
    R_Color(nullptr);

    return width;
}

void UI_Tooltip (const uiNode_t* node, int x, int y)
{
    const char* string;
    const char* key = nullptr;
    const char* tooltip = nullptr;
    static const int maxWidth = 200;

    /* check values */
    if (node->key)
        key = Key_KeynumToString(node->key->key);
    if (node->tooltip)
        tooltip = UI_GetReferenceString(node, node->tooltip);

    /* normalize */
    if (tooltip && tooltip[0] == '\0')
        tooltip = nullptr;
    if (key && key[0] == '\0')
        key = nullptr;

    /* create tooltip */
    if (key && tooltip) {
        char buf[MAX_VAR];
        Com_sprintf(buf, sizeof(buf), _("Key: %s"), key);
        string = va("%s\n%s", tooltip, buf);
    } else if (tooltip) {
        string = tooltip;
    } else if (key) {
        string = va(_("Key: %s"), key);
    } else {
        return;
    }

    UI_DrawTooltip(string, x, y, maxWidth);
}