/* SuperEQ GTK Widget for for DeaDBeeF Copyright (C) 2010 Viktor Semykin <thesame.ml@gmail.com> 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/>. */ // sripped down and polished by Alexey Yakovenko <waker@users.sourceforge.net> const string[] freqs = { "55 Hz","77 Hz","110 Hz","156 Hz","220 Hz","311 Hz","440 Hz","622 Hz","880 Hz", "1.2 kHz","1.8 kHz","2.5 kHz","3.5 kHz","5 kHz","7 kHz","10 kHz","14 kHz","20 kHz" }; namespace Ddb { public class Equalizer : Gtk.DrawingArea { public signal void on_changed (); private double[] values = new double [bands]; private double preamp = 0.5; private int mouse_y = -1; private bool curve_hook = false; private bool preamp_hook = false; private int margin_bottom = -1; private int margin_left = -1; static const int spot_size = 3; static const int bands = 18; // Gdk.Cursor moving_cursor = new Gdk.Cursor (Gdk.CursorType.FLEUR); // Gdk.Cursor updown_cursor = new Gdk.Cursor (Gdk.CursorType.double_ARROW); Gdk.Cursor pointer_cursor = new Gdk.Cursor (Gdk.CursorType.LEFT_PTR); construct { margin_bottom = (int)(Pango.units_to_double (get_style ().font_desc.get_size ()) * Gdk.Screen.get_default ().get_resolution () / 72 + 4); margin_left = margin_bottom * 4; //color_changed (); } public override bool configure_event (Gdk.EventConfigure event) { Gtkui.init_theme_colors (); return false; } public override void realize () { base.realize (); add_events (Gdk.EventMask.EXPOSURE_MASK | Gdk.EventMask.BUTTON_PRESS_MASK | Gdk.EventMask.BUTTON_RELEASE_MASK | Gdk.EventMask.LEAVE_NOTIFY_MASK | Gdk.EventMask.POINTER_MOTION_MASK); } public override bool expose_event (Gdk.EventExpose event) { Gdk.Color fore_bright_color = Gtkui.get_bar_foreground_color (); Gdk.Color c1 = fore_bright_color; Gdk.Color c2 = Gtkui.get_bar_background_color (); Gdk.Color fore_dark_color = c2; fore_dark_color.red += (int16)((c1.red - c2.red) * 0.5); fore_dark_color.green += (int16)((c1.green - c2.green) * 0.5); fore_dark_color.blue += (int16)((c1.blue - c2.blue) * 0.5); int width = allocation.width; int height = allocation.height; Gdk.Drawable d = get_window(); var gc = d.create_gc (Gdk.GCValues(), 0); //Gdk.Rectangle rc = {0, 0, allocation.width, allocation.height}; //gc.set_clip_rectangle (rc); gc.set_rgb_fg_color (c2); d.draw_rectangle (gc, true, 0, 0, width, height); gc.set_rgb_fg_color (fore_dark_color); //drawing grid: double step = (double)(width - margin_left) / (double)(bands+1); int i; for (i = 0; i < bands; i++) { //does anyone know why this method is static? Gdk.draw_line (d, gc, (int)((i+1)*step)+margin_left, 0, (int)((i+1)*step)+margin_left, height - margin_bottom); } double vstep = (double)(height-margin_bottom); for (double di=0; di < 2; di += 0.25) { Gdk.draw_line (d, gc, margin_left, (int)((di-preamp)*vstep), width, (int)((di-preamp)*vstep)); } gc.set_rgb_fg_color (fore_bright_color); //drawing freqs: Pango.Layout l = create_pango_layout (null); var ctx = l.get_context (); var fd = get_style ().font_desc.copy (); // var fd = ctx.get_font_description (); fd.set_size ((int)(get_style ().font_desc.get_size () * 0.7)); ctx.set_font_description (fd); for (i = 0; i < bands; i++) { l.set_text (freqs[i], (int)freqs[i].len()); Pango.Rectangle ink, log; l.get_pixel_extents (out ink, out log); int offs = 2; if ((i % 2) != 0) { offs += 2; } Gdk.draw_layout (d, gc, (int)((i+1)*step)+margin_left - ink.width/2, height-margin_bottom + offs, l); } fd.set_size ((int)(get_style ().font_desc.get_size ())); ctx.set_font_description (fd); //drawing db's: l.set_width (margin_left-1); l.set_alignment (Pango.Alignment.RIGHT); int fontsize = (int)(Pango.units_to_double (fd.get_size ()) * Gdk.Screen.get_default ().get_resolution () / 72); if ((mouse_y >= 0) && (mouse_y < height - margin_bottom)) { double db = scale((double)(mouse_y-1) / (double)(height - margin_bottom - 2)); string tmp = "%s%.1fdB".printf (db > 0 ? "+" : "", db); l.set_text (tmp, (int)tmp.len()); Gdk.draw_layout (d, gc, margin_left-1, mouse_y-3, l); } string tmp; double val = scale(1); tmp = "%s%.1fdB".printf (val > 0 ? "+" : "", val); l.set_text (tmp, (int)tmp.len()); Gdk.draw_layout (d, gc, margin_left-1, height-margin_bottom-fontsize, l); val = scale(0); tmp = "%s%.1fdB".printf (val > 0 ? "+" : "", val); l.set_text (tmp, (int)tmp.len()); Gdk.draw_layout (d, gc, margin_left-1, 1, l); l.set_text ("+0dB", 4); Gdk.draw_layout (d, gc, margin_left-1, (int)((1-preamp)*(height-margin_bottom))-fontsize/2, l); l.set_text ("preamp", 6); l.set_alignment (Pango.Alignment.LEFT); Gdk.draw_layout (d, gc, 1, height-margin_bottom+2, l); d.draw_rectangle (gc, false, margin_left, 0, width-margin_left-1, height-margin_bottom-1); gc.set_line_attributes (2, Gdk.LineStyle.SOLID, Gdk.CapStyle.NOT_LAST, Gdk.JoinStyle.MITER); //draw preamp gc.set_clip_rectangle ({0, (int)(preamp * (height-margin_bottom)), 11, height}); gc.set_rgb_fg_color (fore_bright_color); int count = (int)((height-margin_bottom) / 6)+1; for (int j = 0; j < count; j++) d.draw_rectangle ( gc, true, 1, height-margin_bottom-j*6 - 6, 11, 4); gc.set_clip_rectangle ({margin_left+1, 1, width-margin_left-2, height-margin_bottom-2}); //drawing bars: gc.set_rgb_fg_color (fore_bright_color); int bar_w = 11; if (step < bar_w) bar_w = (int)step-1; for (i = 0; i < bands; i++) { gc.set_clip_rectangle ({ (int)((i+1)*step)+margin_left - bar_w/2, (int)(values[i] * (height-margin_bottom)), 11, height}); count = (int)((height-margin_bottom) * (1-values[i]) / 6)+1; for (int j = 0; j < count; j++) d.draw_rectangle ( gc, true, (int)((i+1)*step)+margin_left - bar_w/2, height-margin_bottom-j*6 - 6, bar_w, 4); } gc.set_clip_rectangle ({0, 0, width, height}); //drawing mouse coordinates: gc.set_line_attributes (1, Gdk.LineStyle.ON_OFF_DASH, Gdk.CapStyle.NOT_LAST, Gdk.JoinStyle.MITER); Gdk.draw_line (d, gc, margin_left+1, mouse_y, width, mouse_y); return false; } private inline double scale (double val) { double k = -40; double d = 20; return (val + preamp - 0.5) * k + d; } private bool in_curve_area (double x, double y) { return x > margin_left && x < allocation.width-1 && y > 1 && y < allocation.height-margin_bottom; } private void update_eq_drag (double x, double y) { double band_width = (double)(allocation.width - margin_left) / (double)(bands+1); int band = (int)GLib.Math.floor ((x - margin_left) / band_width - 0.5); if (band < 0) { band = 0; } if (band >= bands) { band = band-1; } if (band >= 0 && band < bands) { values[band] = y / (double)(allocation.height - margin_bottom); if (values[band] > 1) { values[band] = 1; } else if (values[band] < 0) { values[band] = 0; } on_changed (); } } /* Mouse button got pressed over widget */ public override bool button_press_event (Gdk.EventButton event) { if (in_curve_area ((int)event.x, (int)event.y)) { curve_hook = true; update_eq_drag ((int)event.x, (int)event.y); mouse_y = (int)event.y; queue_draw (); return false; } if (event.x <= 11 && event.y > 1 && event.y <= allocation.height-margin_bottom && event.button == 1 ) { preamp = event.y / (double)(allocation.height - margin_bottom); on_changed (); preamp_hook = true; mouse_y = (int)event.y; queue_draw (); } return false; } /* Mouse button got released */ public override bool button_release_event (Gdk.EventButton event) { curve_hook = false; preamp_hook = false; get_window().set_cursor (pointer_cursor); return false; } public override bool leave_notify_event (Gdk.EventCrossing event) { mouse_y = -1; queue_draw(); return false; } /* Mouse pointer moved over widget */ public override bool motion_notify_event (Gdk.EventMotion event) { double y = event.y / (double)(allocation.height - margin_bottom); if (y < 0) y = 0; if (y > 1) y = 1; if (preamp_hook) { preamp = y; on_changed (); queue_draw(); return false; } if (!in_curve_area ((int)event.x, (int)event.y)) mouse_y = -1; else mouse_y = (int)event.y; if (curve_hook) { update_eq_drag ((int)event.x, (int)event.y); mouse_y = (int)event.y; } queue_draw (); return false; } public void set_band (int band, double v) { values[band] = 1 - (v + 20.0) / 40.0; } public double get_band (int band) { return ((1 - values[band]) * 40.0) - 20.0; } public void set_preamp (double v) { preamp = 1 - (v + 20.0) / 40.0; } public double get_preamp () { return ((1 - preamp) * 40.0) - 20.0; } } }