add hovering/show click functionality to ArdourButton

git-svn-id: svn://localhost/ardour2/branches/3.0@10478 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/ardour_button.cc

@@ -50,6 +50,7 @@ ArdourButton::Element ArdourButton::just_led_default_elements = ArdourButton::El
 
 ArdourButton::ArdourButton (Element e)
 	: _elements (e)
+	, _tweaks (Tweaks (0))
 	, _act_on_release (true)
 	, _text_width (0)
 	, _text_height (0)
@@ -63,6 +64,7 @@ ArdourButton::ArdourButton (Element e)
 	, _fixed_diameter (true)
 	, _distinct_led_click (false)
 	, _led_rect (0)
+	, _hovering (false)
 {
 	ColorsChanged.connect (sigc::mem_fun (*this, &ArdourButton::color_handler));
 }
@@ -241,6 +243,16 @@ ArdourButton::render (cairo_t* cr)
 		cairo_set_source_rgba (cr, 0.905, 0.917, 0.925, 0.5);
 		cairo_fill (cr);
 	}
+
+	/* if requested, show hovering */
+	
+	if ((_tweaks & ShowHover)) {
+		if (_hovering) {
+			Gtkmm2ext::rounded_rectangle (cr, 0, 0, _width, _height, _corner_radius);
+			cairo_set_source_rgba (cr, 0.905, 0.917, 0.925, 0.2);
+			cairo_fill (cr);
+		}
+	}
 }
 
 void
@@ -282,12 +294,26 @@ ArdourButton::on_size_request (Gtk::Requisition* req)
 		_text_height = 0;
 	}
 
+	if (_pixbuf) {
+		xpad = 6;
+	}
+
         if ((_elements & Indicator) && _fixed_diameter) {
-                req->width = _text_width + lrint (_diameter) + xpad;
-                req->height = max (_text_height, (int) lrint (_diameter)) + ypad;
+		if (_pixbuf) {
+			req->width = _pixbuf->get_width() + lrint (_diameter) + xpad;
+			req->height = max (_pixbuf->get_height(), (int) lrint (_diameter)) + ypad;
+		} else {
+			req->width = _text_width + lrint (_diameter) + xpad;
+			req->height = max (_text_height, (int) lrint (_diameter)) + ypad;
+		}
         } else {
-                req->width = _text_width + xpad;
-                req->height = _text_height + ypad;
+		if (_pixbuf) {
+			req->width = _pixbuf->get_width() + xpad;
+			req->height = _pixbuf->get_height() + ypad;
+		}  else {
+			req->width = _text_width + xpad;
+			req->height = _text_height + ypad;
+		}
 	}
 }
 
@@ -412,6 +438,10 @@ ArdourButton::on_button_press_event (GdkEventButton *ev)
 		}
 	}
 
+	if (_tweaks & ShowClick) {
+		set_active_state (Gtkmm2ext::Active);
+	}
+
 	if (binding_proxy.button_press_handler (ev)) {
 		return true;
 	}
@@ -437,6 +467,10 @@ ArdourButton::on_button_release_event (GdkEventButton *ev)
 		}
 	}
 
+	if (_tweaks & ShowClick) {
+		unset_active_state ();
+	}
+
 	if (_act_on_release) {
 		if (_action) {
 			Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic (_action);
@@ -595,3 +629,35 @@ ArdourButton::set_visual_state (Gtkmm2ext::VisualState s)
 	}
 }
 	
+bool
+ArdourButton::on_enter_notify_event (GdkEventCrossing* ev)
+{
+	_hovering = true;
+
+	if (_tweaks & ShowHover) {
+		queue_draw ();
+	}
+
+	return CairoWidget::on_enter_notify_event (ev);
+}
+
+bool
+ArdourButton::on_leave_notify_event (GdkEventCrossing* ev)
+{
+	_hovering = false;
+
+	if (_tweaks & ShowHover) {
+		queue_draw ();
+	}
+
+	return CairoWidget::on_leave_notify_event (ev);
+}
+
+void
+ArdourButton::set_tweaks (Tweaks t)
+{
+	if (_tweaks != t) {
+		_tweaks = t;
+		queue_draw ();
+	}
+}

gtk2_ardour/ardour_button.h

@@ -39,7 +39,7 @@ class ArdourButton : public CairoWidget
 		Text = 0x4,
 		Indicator = 0x8,
 	};
-	
+
 	static Element default_elements;
 	static Element led_default_elements;
 	static Element just_led_default_elements;
@@ -48,6 +48,15 @@ class ArdourButton : public CairoWidget
 	ArdourButton (const std::string&, Element e = default_elements);
 	virtual ~ArdourButton ();
 
+	enum Tweaks {
+		ShowClick = 0x1,
+		ShowHover = 0x2,
+		NoModel = 0x4,
+	};
+
+	Tweaks tweaks() const { return _tweaks; }
+	void set_tweaks (Tweaks);
+
 	void set_active_state (Gtkmm2ext::ActiveState);
 	void set_visual_state (Gtkmm2ext::VisualState);
 
@@ -81,6 +90,8 @@ class ArdourButton : public CairoWidget
 	void on_size_request (Gtk::Requisition* req);
 	void on_size_allocate (Gtk::Allocation&);
 	void on_style_changed (const Glib::RefPtr<Gtk::Style>&);
+	bool on_enter_notify_event (GdkEventCrossing*);
+	bool on_leave_notify_event (GdkEventCrossing*);
 
         void controllable_changed ();
         PBD::ScopedConnection watch_connection;
@@ -90,6 +101,7 @@ class ArdourButton : public CairoWidget
 	Glib::RefPtr<Gdk::Pixbuf>   _pixbuf;
 	std::string                 _text;
 	Element                     _elements;
+	Tweaks                      _tweaks;
 	BindingProxy binding_proxy;
 	bool    _act_on_release;
 
@@ -117,6 +129,7 @@ class ArdourButton : public CairoWidget
 	bool _fixed_diameter;
 	bool _distinct_led_click;
 	cairo_rectangle_t* _led_rect;
+	bool _hovering;
 
 	void setup_led_rect ();
 	void set_colors ();