From a865ac36a360e15ae8b327d877dd9e739627f1f3 Mon Sep 17 00:00:00 2001
From: Anna Schumaker <schumaker.anna@gmail.com>
Date: Wed, 22 Jan 2014 21:19:18 -0500
Subject: [PATCH] gui: Respond to changing current tab

I display the runtime of the currently visible playqueue in the bottom
right of the screen.  When the collection manager is visible, I hide
this label.

Signed-off-by: Anna Schumaker <schumaker.anna@gmail.com>
---
 gui/ocarina6.glade |  3 +--
 gui/tabs.cpp       | 51 ++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 48 insertions(+), 6 deletions(-)

diff --git a/gui/ocarina6.glade b/gui/ocarina6.glade
index 59d91e66..46193733 100644
--- a/gui/ocarina6.glade
+++ b/gui/ocarina6.glade
@@ -722,11 +722,10 @@ Manager</property>
               </packing>
             </child>
             <child>
-              <object class="GtkLabel" id="label6">
+              <object class="GtkLabel" id="o_queue_time">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="xalign">1</property>
-                <property name="label" translatable="yes">S Songs: D days, H hours, M minutes, S seconds</property>
               </object>
               <packing>
                 <property name="expand">False</property>
diff --git a/gui/tabs.cpp b/gui/tabs.cpp
index ff7894d8..ebd2cf9e 100644
--- a/gui/tabs.cpp
+++ b/gui/tabs.cpp
@@ -39,6 +39,7 @@ static unsigned int q_col_width[] = { 20, 300, 60, 125, 125, 1, 125, 60, 1 };
 class OcarinaTab {
 private:
 	Glib::RefPtr<PlayqueueModel> model;
+	Gtk::Notebook *notebook;
 
 	/* Tab widgets */
 	Gtk::VBox  tab_box;
@@ -60,9 +61,12 @@ private:
 public:
 	OcarinaTab(const std::string &, Playqueue *);
 	~OcarinaTab();
+	bool is_current_tab();
+	bool is_current_tab(unsigned int);
 
 	void on_row_inserted(unsigned int);
 	void on_row_deleted(unsigned int);
+	void on_runtime_changed();
 };
 
 
@@ -70,7 +74,6 @@ OcarinaTab::OcarinaTab(const std::string &text, Playqueue *pq)
 	  : tab_name("<big>" + text + "</big>", 1, 0.5),
 	    tab_size("0", 1, 0.5)
 {
-	Gtk::Notebook *notebook;
 	get_builder()->get_widget("o_notebook", notebook);
 	model = Glib::RefPtr<PlayqueueModel>(new PlayqueueModel(pq));
 
@@ -118,10 +121,7 @@ OcarinaTab::OcarinaTab(const std::string &text, Playqueue *pq)
 
 OcarinaTab::~OcarinaTab()
 {
-	Gtk::Notebook *notebook;
-	get_builder()->get_widget("o_notebook", notebook);
 	notebook->remove_page(page_box);
-
 	tab_map.erase(model->queue);
 }
 
@@ -135,6 +135,16 @@ void OcarinaTab::setup_columns()
 	}
 }
 
+bool OcarinaTab::is_current_tab()
+{
+	return notebook->page_num(page_box) == notebook->get_current_page();
+}
+
+bool OcarinaTab::is_current_tab(unsigned int tab)
+{
+	return notebook->page_num(page_box) == (int)tab;
+}
+
 void OcarinaTab::set_tab_size()
 {
 	std::stringstream ss;
@@ -146,12 +156,23 @@ void OcarinaTab::on_row_inserted(unsigned int row)
 {
 	model->on_row_inserted(row);
 	set_tab_size();
+	if (is_current_tab())
+		on_runtime_changed();
 }
 
 void OcarinaTab::on_row_deleted(unsigned int row)
 {
 	model->on_row_deleted(row);
 	set_tab_size();
+	if (is_current_tab())
+		on_runtime_changed();
+}
+
+void OcarinaTab::on_runtime_changed()
+{
+	Gtk::Label *label;
+	get_builder()->get_widget("o_queue_time", label);
+	label->set_text(model->queue->get_length_str());
 }
 
 
@@ -170,11 +191,33 @@ static void on_track_deleted(Playqueue *pq, unsigned int row)
 	tab_map[pq]->on_row_deleted(row);
 }
 
+static void on_switch_page(Gtk::Widget *page, unsigned int num)
+{
+	Gtk::Label *label;
+	std::map<Playqueue *, OcarinaTab *>::iterator it;
+	get_builder()->get_widget("o_queue_time", label);
+
+	for (it = tab_map.begin(); it != tab_map.end(); it++) {
+		if (it->second->is_current_tab(num)) {
+			it->second->on_runtime_changed();
+			label->show();
+			return;
+		}
+	}
+
+	label->hide();
+}
+
 void init_tabs()
 {
+	Gtk::Notebook *notebook;
+	get_builder()->get_widget("o_notebook", notebook);
+
 	new OcarinaTab("Collection", deck::get_library_pq());
 	get_callbacks()->on_queue_track_add = on_track_added;
 	get_callbacks()->on_queue_track_del = on_track_deleted;
+
+	notebook->signal_switch_page().connect(sigc::ptr_fun(on_switch_page));
 }
 
 void cleanup_tabs()