prolooks helper code from hans, enabling new knob drawing based on Thorsten Wilm's lovely knob/dial design. To Be Tweaked

git-svn-id: svn://localhost/ardour2/branches/3.0@7074 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 234 insertions, 6 deletions

diff --git a/libs/gtkmm2ext/motionfeedback.cc b/libs/gtkmm2ext/motionfeedback.cc
index 06aa2e507e..bd08588de3 100644
--- a/libs/gtkmm2ext/motionfeedback.cc
+++ b/libs/gtkmm2ext/motionfeedback.cc
@@ -27,6 +27,7 @@
 
 #include "gtkmm2ext/motionfeedback.h"
 #include "gtkmm2ext/keyboard.h"
+#include "gtkmm2ext/prolooks-helpers.h"
 
 using namespace Gtk;
 using namespace Gtkmm2ext;
@@ -62,6 +63,8 @@ MotionFeedback::MotionFeedback (Glib::RefPtr<Gdk::Pixbuf> pix,
 	pack_start (*hpacker, false, false);
 	pixwin.show ();
 
+        set_lamp_color (Gdk::Color ("#b9feff"));
+
 	if (with_numeric_display) {
 
                 value_packer = new HBox;
@@ -296,10 +299,225 @@ MotionFeedback::adjustment_changed ()
 	pixwin.queue_draw ();
 }
 
+void
+MotionFeedback::core_draw (cairo_t* cr, int phase, double radius, double x, double y)
+{
+	double width;
+	double height;
+	double xc;
+	double yc;
+	double start_angle;
+	double end_angle;
+	double value_angle;
+	double value;
+	double value_x;
+	double value_y;
+	double start_angle_x;
+	double start_angle_y;
+	double end_angle_x;
+	double end_angle_y;
+	double progress_width;
+	double progress_radius;
+	double progress_radius_inner;
+	double progress_radius_outer;
+	double knob_disc_radius;
+	cairo_pattern_t* pattern;
+	GdkColor col2 = {0,0,0,0};
+	GdkColor lamp_bright;
+	GdkColor col3 = {0,0,0,0};
+	GdkColor lamp_dark;
+	double progress_rim_width;
+	cairo_pattern_t* progress_shine;
+	double degrees;
+	cairo_pattern_t* knob_ripples;
+
+	g_return_if_fail (cr != NULL);
+
+	cairo_set_source_rgba (cr, 0.75, 0.75, 0.75, (double) 0);
+	cairo_rectangle (cr, (double) 0, (double) 0, subwidth, subheight);
+	cairo_fill (cr);
+
+	width = 105.0;
+	height = 105.0;
+	xc = width / 2.0;
+	yc = height / 2.0;
+	start_angle = 0.0;
+	end_angle = 0.0;
+	value_angle = 0.0;
+	value = (phase * 1.0) / (65 - 1);
+
+        start_angle = ((180 - 45) * G_PI) / 180;
+        end_angle = ((360 + 45) * G_PI) / 180;
+
+	value_angle = start_angle + (value * (end_angle - start_angle));
+	value_x = cos (value_angle);
+	value_y = sin (value_angle);
+	start_angle_x = cos (start_angle);
+	start_angle_y = sin (start_angle);
+	end_angle_x = cos (end_angle);
+	end_angle_y = sin (end_angle);
+	cairo_save (cr);
+	//cairo_translate (cr, x, (double) 0);
+	cairo_scale (cr, (2.0 * radius) / width, (2.0 * radius) / height);
+	//cairo_translate (cr, -xc, (double) 0);
+
+        pattern = prolooks_create_gradient_str ((double) 32, (double) 16, (double) 75, (double) 16, "#d4c8b9", "#ae977b", 1.0, 1.0);
+        cairo_set_source (cr, pattern);
+	cairo_pattern_destroy (pattern);
+	cairo_set_line_width (cr, 2.0);
+	cairo_arc (cr, xc, yc, 31.5, 0.0, 2 * G_PI);
+	cairo_stroke (cr);
+
+	progress_width = 20.0;
+	progress_radius = 40.0;
+	progress_radius_inner = progress_radius - (progress_width / 2.0);
+	progress_radius_outer = progress_radius + (progress_width / 2.0);
+	knob_disc_radius = progress_radius_inner - 5.0;
+
+        pattern = prolooks_create_gradient_str ((double) 20, (double) 20, (double) 89, (double) 87, "#2f2f4c", "#090a0d", 1.0, 1.0);
+	cairo_set_source (cr, pattern);
+	cairo_pattern_destroy (pattern);
+	cairo_set_line_width (cr, progress_width);
+	cairo_arc (cr, xc, yc, progress_radius, start_angle, end_angle);
+	cairo_stroke (cr);
+
+	lamp_bright = (prolooks_hsv_to_gdk_color (lamp_hsv, &col2), col2);
+	prolooks_hsv_set_saturation (lamp_hsv, 0.66);
+	prolooks_hsv_set_value (lamp_hsv, 0.67);
+	lamp_dark = (prolooks_hsv_to_gdk_color (lamp_hsv, &col3), col3);
+
+        pattern = prolooks_create_gradient ((double) 20, (double) 20, (double) 89, (double) 87, &lamp_bright, &lamp_dark, 1.0, 1.0);
+	cairo_set_source (cr, pattern);
+	cairo_pattern_destroy (pattern);
+	cairo_set_line_width (cr, progress_width);
+	cairo_arc (cr, xc, yc, progress_radius, start_angle, value_angle);
+	cairo_stroke (cr);
+
+	cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
+	progress_rim_width = 2.0;
+	cairo_set_line_width (cr, progress_rim_width);
+        pattern = prolooks_create_gradient_str ((double) 18, (double) 79, (double) 35, (double) 79, "#dfd5c9", "#dfd5c9", 1.0, 0.0);
+	cairo_set_source (cr, pattern);
+	cairo_pattern_destroy (pattern);
+	cairo_move_to (cr, xc + (progress_radius_outer * start_angle_x), yc + (progress_radius_outer * start_angle_y));
+	cairo_line_to (cr, xc + (progress_radius_inner * start_angle_x), yc + (progress_radius_inner * start_angle_y));
+	cairo_stroke (cr);
+
+	prolooks_set_source_color_string (cr, "#b3a190", 1.0);
+	cairo_move_to (cr, xc + (progress_radius_outer * end_angle_x), yc + (progress_radius_outer * end_angle_y));
+	cairo_line_to (cr, xc + (progress_radius_inner * end_angle_x), yc + (progress_radius_inner * end_angle_y));
+	cairo_stroke (cr);
+
+        pattern = prolooks_create_gradient_str ((double) 95, (double) 6, (double) 5, (double) 44, "#dfd5c9", "#b0a090", 1.0, 1.0);
+	cairo_set_source (cr, pattern);
+	cairo_pattern_destroy (pattern);
+	cairo_arc (cr, xc, yc, progress_radius_outer, start_angle, end_angle);
+	cairo_stroke (cr);
+
+	cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
+        pattern = prolooks_create_gradient ((double) 20, (double) 20, (double) 89, (double) 87, &lamp_bright, &lamp_dark, 0.25, 0.25);
+	cairo_set_source (cr, pattern);
+	cairo_pattern_destroy (pattern);
+	cairo_set_line_width (cr, progress_width);
+	cairo_arc (cr, xc, yc, progress_radius, start_angle, value_angle + (G_PI / 180.0));
+	cairo_stroke (cr);
+
+	progress_shine = prolooks_create_gradient_str ((double) 89, (double) 73, (double) 34, (double) 16, "#ffffff", "#ffffff", 0.3, 0.04);
+	cairo_pattern_add_color_stop_rgba (progress_shine, 0.5, 1.0, 1.0, 1.0, 0.0);
+	cairo_pattern_add_color_stop_rgba (progress_shine, 0.75, 1.0, 1.0, 1.0, 0.3);
+	cairo_set_source (cr, progress_shine);
+	cairo_set_line_width (cr, progress_width);
+	cairo_arc (cr, xc, yc, progress_radius, start_angle, end_angle);
+	cairo_stroke (cr);
+
+	cairo_set_line_width (cr, 1.0);
+	cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
+	cairo_arc (cr, xc, yc, progress_radius_inner, (double) 0, 2 * G_PI);
+        pattern = prolooks_create_gradient_str ((double) 35, (double) 31, (double) 75, (double) 72, "#68625c", "#44494b", 1.0, 1.0);
+	cairo_set_source (cr, pattern);
+	cairo_pattern_destroy (pattern);
+	cairo_fill (cr);
+	cairo_set_source_rgb (cr, (double) 0, (double) 0, (double) 0);
+	cairo_arc (cr, xc, yc, progress_radius_inner, (double) 0, 2 * G_PI);
+	cairo_stroke (cr);
+
+        pattern = prolooks_create_gradient_str ((double) 42, (double) 34, (double) 68, (double) 70, "#e7ecef", "#9cafb8", 1.0, 1.0);
+	cairo_set_source (cr, pattern);
+	cairo_pattern_destroy (pattern);
+	cairo_arc (cr, xc, yc, knob_disc_radius, (double) 0, 2 * G_PI);
+	cairo_fill (cr);
+
+	cairo_set_line_width (cr, 2.0);
+	degrees = G_PI / 180.0;
+        pattern = prolooks_create_gradient_str ((double) 38, (double) 34, (double) 70, (double) 68, "#ffffff", "#caddf2", 0.2, 0.2);
+	cairo_set_source (cr, pattern);
+	cairo_pattern_destroy (pattern);
+	cairo_move_to (cr, xc, yc);
+	cairo_arc (cr, xc, yc, knob_disc_radius - 1, (-154) * degrees, (-120) * degrees);
+	cairo_move_to (cr, xc, yc);
+	cairo_arc (cr, xc, yc, knob_disc_radius - 1, (G_PI / 2.0) - (60 * degrees), (G_PI / 2.0) - (29 * degrees));
+	cairo_fill (cr);
+
+        pattern = prolooks_create_gradient_str ((double) 50, (double) 40, (double) 62, (double) 60, "#a1adb6", "#47535c", 0.07, 0.15);
+	cairo_set_source (cr, pattern);
+	cairo_pattern_destroy (pattern);
+	cairo_move_to (cr, xc, yc);
+	cairo_arc (cr, xc, yc, knob_disc_radius - 1, (-67) * degrees, (-27) * degrees);
+	cairo_move_to (cr, xc, yc);
+	cairo_arc (cr, xc, yc, knob_disc_radius - 1, G_PI - (67 * degrees), G_PI - (27 * degrees));
+	cairo_fill (cr);
+
+	knob_ripples = cairo_pattern_create_radial (xc, yc, (double) 0, xc, yc, (double) 4);
+	prolooks_add_color_stop_str (knob_ripples, 0.0, "#e7ecef", 0.05);
+	prolooks_add_color_stop_str (knob_ripples, 0.5, "#58717d", 0.05);
+	prolooks_add_color_stop_str (knob_ripples, 0.75, "#d1d9de", 0.05);
+	prolooks_add_color_stop_str (knob_ripples, 1.0, "#5d7682", 0.05);
+	cairo_pattern_set_extend (knob_ripples, CAIRO_EXTEND_REPEAT);
+	cairo_set_line_width (cr, 0.0);
+	cairo_set_source (cr, knob_ripples);
+	cairo_arc (cr, xc, yc, knob_disc_radius, (double) 0, 2 * G_PI);
+	cairo_fill (cr);
+
+	cairo_save (cr);
+	cairo_translate (cr, xc + (knob_disc_radius * value_x), yc + (knob_disc_radius * value_y));
+	cairo_rotate (cr, value_angle - G_PI);
+	cairo_set_source (cr, pattern = prolooks_create_gradient_str ((double) 16, (double) (-2), (double) 9, (double) 13, "#e7ecef", "#9cafb8", 0.8, 0.8));
+	cairo_pattern_destroy (pattern);
+	cairo_move_to (cr, (double) 0, (double) 4);
+	cairo_line_to (cr, (double) 17, (double) 4);
+	cairo_curve_to (cr, (double) 19, (double) 4, (double) 21, (double) 2, (double) 21, (double) 0);
+	cairo_curve_to (cr, (double) 21, (double) (-2), (double) 19, (double) (-4), (double) 17, (double) (-4));
+	cairo_line_to (cr, (double) 0, (double) (-4));
+	cairo_close_path (cr);
+	cairo_fill (cr);
+
+        pattern = prolooks_create_gradient_str ((double) 9, (double) (-2), (double) 9, (double) 2, "#68625c", "#44494b", 1.0, 1.0);
+	cairo_set_source (cr, pattern);
+	cairo_pattern_destroy (pattern);
+	cairo_move_to (cr, (double) 0, (double) 2);
+	cairo_line_to (cr, (double) 16, (double) 2);
+	cairo_curve_to (cr, (double) 17, (double) 2, (double) 18, (double) 1, (double) 18, (double) 0);
+	cairo_curve_to (cr, (double) 18, (double) (-1), (double) 17, (double) (-2), (double) 16, (double) (-2));
+	cairo_line_to (cr, (double) 0, (double) (-2));
+	cairo_close_path (cr);
+	cairo_fill (cr);
+
+	cairo_restore (cr);
+	cairo_set_line_width (cr, 2.0);
+        pattern = prolooks_create_gradient_str ((double) 38, (double) 32, (double) 70, (double) 67, "#3d3d3d", "#000000", 1.0, 1.0);
+        cairo_set_source (cr, pattern);
+	cairo_pattern_destroy (pattern);
+	cairo_arc (cr, xc, yc, knob_disc_radius, (double) 0, 2 * G_PI);
+	cairo_stroke (cr);
+	cairo_restore (cr);
+
+	cairo_pattern_destroy (progress_shine);
+	cairo_pattern_destroy (knob_ripples);
+}
+
 bool
 MotionFeedback::pixwin_expose_event (GdkEventExpose* ev)
 {
-	GtkWidget* widget = GTK_WIDGET(pixwin.gobj());
 	GdkWindow *window = pixwin.get_window()->gobj();
 	GtkAdjustment* adj = adjustment->gobj();
 
@@ -333,11 +551,14 @@ MotionFeedback::pixwin_expose_event (GdkEventExpose* ev)
 			phase = (phase + 63) % 64;
 	}
 
-	gdk_draw_pixbuf (GDK_DRAWABLE(window), widget->style->fg_gc[0], 
-			 pixbuf->gobj(), 
-			 phase * subwidth, type * subheight, 
-			 0, 0, subwidth, subheight, GDK_RGB_DITHER_NORMAL, 0, 0);
-	
+	cairo_t* cr = gdk_cairo_create (GDK_DRAWABLE (window));
+
+	gdk_cairo_rectangle (cr, &ev->area);
+	cairo_clip (cr);
+
+        core_draw (cr, phase, subheight/2, subwidth/2, subheight/2);
+        cairo_destroy (cr);
+
 	return true;
 }
 
@@ -375,3 +596,10 @@ MotionFeedback::pixwin_size_request (GtkRequisition* req)
 	req->width = subwidth;
 	req->height = subheight;
 }
+
+void
+MotionFeedback::set_lamp_color (const Gdk::Color& c)
+{
+	_lamp_color = c;
+	lamp_hsv = prolooks_hsv_new_for_gdk_color (_lamp_color.gobj());
+}