// ==PREPROCESSOR==
// @name "VU Meter"
// @version "1.0.1"
// @author "VU Meter component/object by DRON, jscript by Br3tt aka Falstaff >> http://br3tt.deviantart.com"
// @feature "dragdrop"
// ==/PREPROCESSOR==

// [Requirements]
// * foobar2000 v1.1 or better  >> http://foobar2000.org
// * WSH panel Mod v1.5.3.1 or better  >> http://code.google.com/p/foo-wsh-panel-mod/downloads/list
// * VU Meter 2012-05-27 or better >> http://foobar2000.org.ru/forum/
// * background image and needle image >> http://br3tt.free.fr/files/R/images.zip
// [/Requirements]

function LevelToAngle(Level, MinAngle, MaxAngle) {
    L = Level +(Level > 1 ? 0.1 : 0.19) * (Level - 1);
    Angle = MinAngle + L * (MaxAngle - MinAngle) * 132 / 193;
    return Math.min(Math.max(MinAngle, MaxAngle),
      Math.max(Math.min(MinAngle, MaxAngle), Angle));
};

// Images Path + FileNames
var img_dir = fb.ProfilePath + "themes\\fooRazor\\images\\";
var bg = gdi.Image(img_dir+"vu_bg.png");
var needle = gdi.Image(img_dir+"needle.png");
var bg_img;

// {{
// Use with MenuManager()
MF_STRING = 0x00000000;
MF_SEPARATOR = 0x00000800;
MF_GRAYED = 0x00000001;
MF_DISABLED = 0x00000002;
MF_POPUP = 0x00000010;
// }}

// {{
// Used in window.GetColorCUI()
ColorTypeCUI = {
    text: 0,
    selection_text: 1,
    inactive_selection_text: 2,
    background: 3,
    selection_background: 4,
    inactive_selection_background: 5,
    active_item_frame: 6
};
// }}

// {{
// Used in window.GetColorDUI()
ColorTypeDUI = {
    text: 0,
    background: 1,
    highlight: 2,
    selection: 3
};
// }}

function RGB(r, g, b) {
    return (0xff000000 | (r << 16) | (g << 8) | (b));
};
function RGBA(r, g, b, a) {
    return ((a << 24) | (r << 16) | (g << 8) | (b));
};

// window Properties
var keepaspectratio = window.GetProperty("Keep Aspect Ratio", true);
var layout = window.GetProperty("L+R Channels", false);

// VUMeter Object
VUMeter = new ActiveXObject("VUMeter");
VUMeter.RegisterWindow(window.ID);
//VUMeter.RegisterRect(window.ID,0,0,200,100);

// Globals
var vu_angle2 = 110 / 2;
var g_instancetype = window.InstanceType;
var ww = 0, wh = 0, true_ww = 0;
var mouse_x, mouse_y;
var g_textcolor = 0, g_textcolor_hl = 0;
var g_backcolor = 0;
var g_syscolor = 0;
var COLOR_BTNFACE = 15;
var g_tooltip = window.CreateTooltip();
var tooltip_timer = false;

function get_colors() {
    if (g_instancetype == 0) { // CUI
        g_textcolor = window.GetColorCUI(ColorTypeCUI.text);
        g_textcolor_hl = window.GetColorCUI(ColorTypeCUI.text);
        g_textcolor_sel = window.GetColorCUI(ColorTypeCUI.selection_text);
        g_backcolor = window.GetColorCUI(ColorTypeCUI.background);
    } else if (g_instancetype == 1) { // DUI
        g_textcolor = window.GetColorDUI(ColorTypeDUI.text);
        g_textcolor_hl = window.GetColorDUI(ColorTypeDUI.highlight);
        g_textcolor_sel = window.GetColorDUI(ColorTypeDUI.selection);
        g_backcolor = window.GetColorDUI(ColorTypeDUI.background);
    } else {
        // None
    };
    g_syscolor = utils.GetSysColor(COLOR_BTNFACE);
}
get_colors();

function on_size() {
    ww = window.Width;
    wh = window.Height;

    if(!ww || !wh) return true;

    bg_img && bg_img.Dispose();

    if(layout) {
        if(keepaspectratio) {
            if(wh != Math.floor(ww/4)) {
                window.MinHeight = Math.floor(ww/4);
                window.MaxHeight = Math.floor(ww/4);
            }
        } else {
            window.MinHeight = 0;
            window.MaxHeight = 0;
        }
        ww = Math.floor(ww / 2);
    } else {
        if(keepaspectratio) {
            if(wh != Math.floor(ww/2)) {
                window.MinHeight = Math.floor(ww/2);
                window.MaxHeight = Math.floor(ww/2);
            }
        } else {
            window.MinHeight = 0;
            window.MaxHeight = 0;
        }
    }

    bg_img = bg.Resize(ww, Math.round(ww/2), 7);
    true_ww = window.Width;

};

function on_paint(gr) {
    L = VUMeter.LeftLevel;
    R = VUMeter.RightLevel;
    LM = VUMeter.LeftPeak;
    RM = VUMeter.RightPeak;

    // Convert to Mono
    if(!layout) {
        L = (L + R) / 2;
        LM = (LM + RM) / 2;
    }

    LA = LevelToAngle(L, -vu_angle2, +vu_angle2);
    RA = LevelToAngle(R, -vu_angle2, +vu_angle2);
    LP = Math.sin(LevelToAngle(LM, -vu_angle2, +vu_angle2) / 180 * Math.PI);
    RP = Math.sin(LevelToAngle(RM, -vu_angle2, +vu_angle2) / 180 * Math.PI);

    // create draw area
    var wh2 = Math.round(ww / 2);
    var main_img = gdi.CreateImage(true_ww, wh2);
    var gb = main_img.GetGraphics();

    // fill bgcolor
    gb.FillSolidRect(0, 0, true_ww, wh2, g_syscolor);

    var ratio = 0.79;
    // Draw Peak
    if(layout) {
        // left peak
        gb.FillGradRect(7, 7, wh2+ratio*wh2*LP-7, wh2-14, 0, RGBA(0,255,0,150), RGBA(255,0,0,150), 1);
        // right peak
        gb.FillGradRect(ww+7, 7, wh2+ratio*wh2*RP-7, wh2-14, 0, RGBA(0,255,0,150), RGBA(255,0,0,150), 1);
    } else {
        // mono peak
        gb.FillGradRect(7, 7, wh2+ratio*wh2*LP-7, wh2-14, 0, RGBA(0,255,0,150), RGBA(255,0,0,150), 1);
    }
    if(layout) {
        gb.FillSolidRect(Math.floor(true_ww/2), 0, 2, wh2, g_backcolor);
        gb.FillSolidRect(true_ww-2, 0, 2, wh2, g_backcolor);
    }

    if(layout) {
        // left background image
        gb.DrawImage(bg_img, 0, 0, bg_img.Width, bg_img.Height, 0, 0, bg_img.Width, bg_img.Height, 0, 255);
        // right background image
        gb.DrawImage(bg_img, ww, 0, bg_img.Width, bg_img.Height, 0, 0, bg_img.Width, bg_img.Height, 0, 255);
    } else {
        // mono background image
        gb.DrawImage(bg_img, 0, 0, bg_img.Width, bg_img.Height, 0, 0, bg_img.Width, bg_img.Height, 0, 255);
    }

    var needle_padding = Math.round(wh2 * 0.15);

    if(layout) {
        // LEFT
        var ratio = (wh2-needle_padding)/150;
        gb.DrawImage(needle, Math.round((ww/2)-(25*ratio/2)), needle_padding, 25*ratio, 300*ratio, 0, 0, 25, 300, LA, 255);

        // RIGHT
        var ratio = (wh2-needle_padding)/150;
        gb.DrawImage(needle, Math.round((ww/2)+ww-(25*ratio/2)), needle_padding, 25*ratio, 300*ratio, 0, 0, 25, 300, RA, 255);

    } else {
        var ratio = (wh2-needle_padding)/150;
        gb.DrawImage(needle, Math.round((ww/2)-(25*ratio/2)), needle_padding, 25*ratio, 300*ratio, 0, 0, 25, 300, LA, 255);
    }

    // Release and Draw true panel graphics
    main_img.ReleaseGraphics(gb);
    gr.DrawImage(main_img, 0, 0, true_ww, wh, 0, 0, true_ww, wh2, 0, 255);
    main_img.Dispose();
}

function on_colors_changed() {
    get_colors();
    window.Repaint();
}

function on_mouse_wheel(step) {
    VUMeter.Offset = VUMeter.Offset + step;
    g_tooltip.Text = VUMeter.Offset + " dB";
    g_tooltip.Activate();
    tooltip_timer && window.ClearTimeout(tooltip_timer);
    tooltip_timer = window.SetTimeout(function() {
        g_tooltip.Text = "";
        g_tooltip.Deactivate();
        tooltip_timer && window.ClearTimeout(tooltip_timer);
        tooltip_timer = false;
    }, 2000);
}

function on_mouse_move(x, y) {
    mouse_x = x;
    mouse_y = y;
}

function on_mouse_leave() {
    g_tooltip.Text = "";
    g_tooltip.Deactivate();
    tooltip_timer && window.ClearTimeout(tooltip_timer);
    tooltip_timer = false;
}

function on_mouse_rbtn_down(x, y, mask) {
    var idx;
    var _menu = window.CreatePopupMenu();
    _menu.AppendMenuItem(MF_STRING, 100, "Left + Right Channels");
    _menu.CheckMenuItem(100, layout?1:0);
    _menu.AppendMenuItem(MF_STRING, 110, "Keep Aspect Ratio");
    _menu.CheckMenuItem(110, keepaspectratio?1:0);
    _menu.AppendMenuSeparator();
    _menu.AppendMenuItem(MF_STRING, 900, "Properties");
    _menu.AppendMenuItem(MF_STRING, 910, "Configure...");
    idx = _menu.TrackPopupMenu(x, y);
    switch(idx) {
        case 100:
            layout = !layout;
            window.SetProperty("L+R Channels", layout);
            on_size();
            break;
        case 110:
            keepaspectratio = !keepaspectratio;
            window.SetProperty("Keep Aspect Ratio", keepaspectratio);
            on_size();
            break;
        case 900:
            window.ShowProperties();
            break;
        case 910:
            window.ShowConfigure();
            break;
        default:
    };
    _menu.Dispose();
    return true;
}