testing loadingscreen animation

this adds a simple animation to the gui2 loadingscreen. It not very good
yet, it more about testing whether animations are possible.

data/gui/window/loadscreen.cfg

@@ -115,6 +115,28 @@
 
 			[/row]
 
+			[row]
+				grow_factor = 0
+
+				[column]
+					grow_factor = 1
+					border = "all"
+					border_size = 5
+					horizontal_alignment = "center"
+					vertical_alignment = "center"
+					horizontal_grow = "true"
+
+					[label]
+						text_alignment = "center"
+						definition = "default_large"
+						id = "test_animation"
+						label = "...................."
+					[/label]
+
+				[/column]
+
+			[/row]
+
 			[row]
 				grow_factor = 1
 

src/gui/dialogs/loadscreen.cpp

@@ -33,6 +33,7 @@ REGISTER_DIALOG(loadscreen)
 tloadscreen::tloadscreen(boost::function<void()> f)
 	: window_(NULL)
 	, timer_id_(0)
+	, animation_counter_(0)
 	, work_(f)
 	, worker_()
 	, cursor_setter_()
@@ -78,6 +79,8 @@ void tloadscreen::pre_show(twindow& window)
 	timer_id_ = add_timer(100, boost::bind(&tloadscreen::timer_callback, this, boost::ref(window)), true);
 	cursor_setter_.reset(new cursor::setter(cursor::WAIT));
 	progress_stage_label_ = &find_widget<tlabel>(&window, "status", false);
+	animation_label_ = &find_widget<tlabel>(&window, "test_animation", false);
+
 }
 
 void tloadscreen::post_show(twindow& /*window*/)
@@ -109,7 +112,13 @@ void tloadscreen::timer_callback(twindow& window)
 	{
 		current_visible_stage_ = current_stage_;
 		progress_stage_label_->set_label(current_visible_stage_);
-
+	}
+	++animation_counter_;
+	if (animation_counter_ % 2 == 0) {
+		int animation_state = (animation_counter_ / 2) % 20;
+		std::string s(20, ' ');
+		s[animation_state] = '.';
+		animation_label_->set_label(s);
 	}
 }
 

src/gui/dialogs/loadscreen.hpp

@@ -58,6 +58,7 @@ class tloadscreen : public tdialog
 private:
 	twindow* window_;
 	size_t timer_id_;
+	int animation_counter_;
 	boost::function<void()> work_;
 	boost::scoped_ptr<boost::thread> worker_;
 	boost::scoped_ptr<cursor::setter> cursor_setter_;
@@ -75,6 +76,7 @@ class tloadscreen : public tdialog
 	void post_show(twindow& window);
 
 	tlabel* progress_stage_label_;
+	tlabel* animation_label_;
 	static tloadscreen* current_load;
 
 	//Note we cannot use std::strings here unless we we explicitly use mutexes.