new ArdourButton class, to start to provide more control over how our buttons work and appear; use ArdourButtons for monitor, solo isolate and solo safe buttons, and in the processor box; don't save UI config file (canvas colors) to the user's home dir unless one or more parameters were modified by the user

git-svn-id: svn://localhost/ardour2/branches/3.0@10311 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 375 insertions, 0 deletions

diff --git a/gtk2_ardour/ardour_button.cc b/gtk2_ardour/ardour_button.cc
new file mode 100644
index 0000000000..042e5fae71
--- /dev/null
+++ b/gtk2_ardour/ardour_button.cc
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+/*
+    Copyright (C) 2010 Paul Davis
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <iostream>
+#include <cmath>
+#include <algorithm>
+
+#include <pangomm/layout.h>
+
+#include "pbd/compose.h"
+
+#include "gtkmm2ext/utils.h"
+#include "gtkmm2ext/rgb_macros.h"
+
+#include "ardour_button.h"
+#include "ardour_ui.h"
+#include "global_signals.h"
+
+using namespace Gdk;
+using namespace Gtk;
+using namespace Glib;
+using std::max;
+using std::min;
+using std::cerr;
+using std::endl;
+
+ArdourButton::ArdourButton()
+        : _text_width (0)
+	, _text_height (0)
+	, _led_left (false)
+        , _diameter (0.0)
+        , _fixed_diameter (false)
+	, _distinct_led_click (true)
+	, edge_pattern (0)
+	, fill_pattern (0)
+	, led_inset_pattern (0)
+	, reflection_pattern (0)
+	  
+{
+	ColorsChanged.connect (sigc::mem_fun (*this, &ArdourButton::color_handler));
+}
+
+ArdourButton::~ArdourButton()
+{
+}
+
+void
+ArdourButton::set_text (const std::string& str)
+{
+	_text = str;
+
+	if (!_layout && !_text.empty()) {
+		_layout = Pango::Layout::create (get_pango_context());
+	} 
+	
+	_layout->set_text (str);
+
+	queue_resize ();
+}
+
+void
+ArdourButton::set_markup (const std::string& str)
+{
+	_text = str;
+
+	if (!_layout) {
+		_layout = Pango::Layout::create (get_pango_context());
+	} 
+
+	_layout->set_text (str);
+	queue_resize ();
+}
+
+void
+ArdourButton::render (cairo_t* cr)
+{
+        if (!_fixed_diameter) {
+                _diameter = std::min (_width, _height);
+        }
+
+	/* background fill. use parent window style, so that we fit in nicely.
+	 */
+	
+	Color c = get_parent_bg ();
+	
+        cairo_rectangle (cr, 0, 0, _width, _height);
+        cairo_stroke_preserve (cr);
+        cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
+        cairo_fill (cr);
+
+	/* edge */
+
+	Gtkmm2ext::rounded_rectangle (cr, 0, 0, _width, _height, 9);
+	cairo_set_source (cr, edge_pattern);
+	cairo_fill (cr);
+
+	/*  button itself: leaves 1 pixel border of the edge visible all around. */
+
+	Gtkmm2ext::rounded_rectangle (cr, 1, 1, _width-2, _height-2, 9);
+	cairo_set_source (cr, fill_pattern);
+	cairo_fill (cr);
+
+	/* text, if any */
+
+	if (!_text.empty()) {
+		cairo_set_source_rgba (cr, text_r, text_g, text_b, text_a);
+		if (_led_left) {
+			cairo_move_to (cr, _diameter + 3 + 4, _height/2.0 - _text_height/2.0);
+		} else {
+			cairo_move_to (cr, 3, _height/2.0 - _text_height/2.0);
+		}
+		pango_cairo_show_layout (cr, _layout->gobj());
+	}
+
+	/* move to the center of the ArdourButton itself */
+
+	if (_led_left) {
+		cairo_translate (cr, 3 + (_diameter/2.0), _height/2.0);
+	} else {
+		cairo_translate (cr, _width - ((_diameter/2.0) + 4.0), _height/2.0);
+	}
+
+	//inset
+	cairo_arc (cr, 0, 0, _diameter/2, 0, 2 * M_PI);
+	cairo_set_source (cr, led_inset_pattern);
+	cairo_fill (cr);
+
+	//black ring
+	cairo_set_source_rgb (cr, 0, 0, 0);
+	cairo_arc (cr, 0, 0, _diameter/2-2, 0, 2 * M_PI);
+	cairo_fill(cr);
+
+	//led color
+	cairo_set_source_rgba (cr, led_r, led_g, led_b, led_a);
+	cairo_arc (cr, 0, 0, _diameter/2-3, 0, 2 * M_PI);
+	cairo_fill(cr);
+
+	//reflection
+	cairo_scale(cr, 0.7, 0.7);
+	cairo_arc (cr, 0, 0, _diameter/2-3, 0, 2 * M_PI);
+	cairo_set_source (cr, reflection_pattern);
+	cairo_fill (cr);
+	cairo_stroke (cr); // ??
+}
+
+void
+ArdourButton::set_state (CairoWidget::State s, bool yn)
+{
+	CairoWidget::set_state (s, yn);
+	set_colors ();
+}
+
+void
+ArdourButton::set_diameter (float d)
+{
+        _diameter = (d*2) + 5.0;
+
+        if (_diameter != 0.0) {
+                _fixed_diameter = true;
+        }
+
+        set_dirty ();
+}
+
+void
+ArdourButton::on_realize ()
+{
+        set_colors ();
+        CairoWidget::on_realize ();
+}
+
+void
+ArdourButton::on_size_request (Gtk::Requisition* req)
+{
+	int xpad = 0;
+	int ypad = 6;
+
+	if (!_text.empty()) {
+		_layout->get_pixel_size (_text_width, _text_height);
+		xpad += 6;
+	}
+		
+        if (_fixed_diameter) {
+                req->width = _text_width + (int) _diameter + xpad;
+                req->height = max (_text_height, (int) _diameter) + ypad;
+        } else {
+                CairoWidget::on_size_request (req);
+        }
+}
+
+void
+ArdourButton::set_colors ()
+{
+	uint32_t start_color;
+	uint32_t end_color;
+	uint32_t r, g, b, a;
+	uint32_t text_color;
+	uint32_t led_color;
+
+	/* we use the edge of the button to show Selected state, so the
+	 * color/pattern used there will vary depending on that
+	 */
+	
+	if (edge_pattern) {
+		cairo_pattern_destroy (edge_pattern);
+	}
+
+	edge_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, _height);
+	if (_state & CairoWidget::Selected) {
+		start_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 border start selected", get_name()));
+		end_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 border end selected", get_name()));
+	} else {
+		start_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 border start", get_name()));
+		end_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 border end", get_name()));
+	}
+	UINT_TO_RGBA (start_color, &r, &g, &b, &a);
+	cairo_pattern_add_color_stop_rgba (edge_pattern, 0, r/255.0,g/255.0,b/255.0, 0.7);
+	UINT_TO_RGBA (end_color, &r, &g, &b, &a);
+	cairo_pattern_add_color_stop_rgba (edge_pattern, 1, r/255.0,g/255.0,b/255.0, 0.7);
+
+	/* the fill pattern is used to indicate Normal/Active/Mid state
+	 */
+
+	if (fill_pattern) {
+		cairo_pattern_destroy (fill_pattern);
+	}
+
+	fill_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, _height);
+	if (_state & Mid) {
+		start_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 fill start mid", get_name()));
+		end_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 fill end mid", get_name()));
+	} else if (_state & Active) {
+		start_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 fill start active", get_name()));
+		end_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 fill end active", get_name()));
+	} else {
+		start_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 fill start", get_name()));
+		end_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 fill end", get_name()));
+	}
+	UINT_TO_RGBA (start_color, &r, &g, &b, &a);
+	cairo_pattern_add_color_stop_rgba (fill_pattern, 0, r/255.0,g/255.0,b/255.0, a/255.0);
+	UINT_TO_RGBA (end_color, &r, &g, &b, &a);
+	cairo_pattern_add_color_stop_rgba (fill_pattern, 1, r/255.0,g/255.0,b/255.0, a/255.0);
+
+	if (led_inset_pattern) {
+		cairo_pattern_destroy (led_inset_pattern);
+	}
+
+	led_inset_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, _diameter);
+	cairo_pattern_add_color_stop_rgba (led_inset_pattern, 0, 0,0,0, 0.4);
+	cairo_pattern_add_color_stop_rgba (led_inset_pattern, 1, 1,1,1, 0.7);
+	
+	if (reflection_pattern) {
+		cairo_pattern_destroy (reflection_pattern);
+	}
+
+	reflection_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, _diameter/2-3);
+	cairo_pattern_add_color_stop_rgba (reflection_pattern, 0, 1,1,1, (_state & Active) ? 0.4 : 0.2);
+	cairo_pattern_add_color_stop_rgba (reflection_pattern, 1, 1,1,1, 0.0);
+
+	/* text and LED colors depend on Active/Normal/Mid */
+	if (_state & Active) {
+		text_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 text active", get_name()));
+		led_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 led active", get_name()));
+	} else if (_state & Mid) {
+		text_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 text mid", get_name()));
+		led_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 led active", get_name()));
+	} else {
+		text_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 text", get_name()));
+		led_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 led", get_name()));
+	}
+
+	UINT_TO_RGBA (text_color, &r, &g, &b, &a);
+	text_r = r/255.0;
+	text_g = g/255.0;
+	text_b = b/255.0;
+	text_a = a/255.0;
+	UINT_TO_RGBA (led_color, &r, &g, &b, &a);
+	led_r = r/255.0;
+	led_g = g/255.0;
+	led_b = b/255.0;
+	led_a = a/255.0;
+
+        set_dirty ();
+}
+
+void
+ArdourButton::set_led_left (bool yn)
+{
+	_led_left = yn;
+}
+
+bool
+ArdourButton::on_button_press_event (GdkEventButton *ev)
+{
+	if (_distinct_led_click) {
+		/* if within LED, swallow event */
+		
+		int top = lrint (_height/2.0 - _diameter/2.0);
+		int bottom = lrint (_height/2.0 + _diameter/2.0);
+		int left;
+		int right;
+		
+		if (_led_left) {
+			left = 4;
+			right = left + _diameter;
+		} else {
+			left = lrint (_width - 4 - _diameter/2.0);
+			right = left + _diameter;
+		}
+
+		if (ev->x >= left && ev->x <= right && ev->y <= bottom && ev->y >= top) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+bool
+ArdourButton::on_button_release_event (GdkEventButton *ev)
+{
+
+	if (_distinct_led_click) {
+
+		/* if within LED, emit signal */
+
+		int top = lrint (_height/2.0 - _diameter/2.0);
+		int bottom = lrint (_height/2.0 + _diameter/2.0);
+		int left;
+		int right;
+		if (_led_left) {
+			left = 4;
+			right = left + _diameter;
+		} else {
+			left = lrint (_width - 4 - _diameter/2.0);
+			right = left + _diameter;
+		}
+		
+		if (ev->x >= left && ev->x <= right && ev->y <= bottom && ev->y >= top) {
+			signal_clicked(); /* EMIT SIGNAL */
+			return true;
+		}
+	}
+
+	return false;
+}
+
+void
+ArdourButton::set_distinct_led_click (bool yn)
+{
+	_distinct_led_click = yn;
+}
+
+void
+ArdourButton::color_handler ()
+{
+	set_colors ();
+	set_dirty ();
+}