Adds "animated" logo to the new title screen.

changelog

@@ -14,6 +14,7 @@ Version 1.9.0-svn:
    * Avoid resizing when next or previous button is pressed in the
      --new-widgets title screen
    * Added gui2 progress bar widget
+   * Added "animated" logo to the --new-widgets title screen
  * WML Engine:
    * Deprecated [set_variable]'s random key, use rand instead
    * Renamed [unit][status] healable to unhealable so it can default to 'no'

data/gui/default/widget/progress_bar_title_screen.cfg

@@ -0,0 +1,41 @@
+#textdomain wesnoth-lib
+###
+### Definition of an progress bar, used to fade in the logo in the title screen.
+###
+
+[progress_bar_definition]
+	id = "title_screen"
+	description = "A progress bar used in the title screen to fade in the logo."
+
+	[resolution]
+
+		min_width = 440
+		min_height = 201
+
+		default_width = 440
+		default_height = 201
+
+		max_width = 440
+		max_height = 201
+
+		[state_enabled]
+
+			[draw]
+
+				[image]
+					# w = 0 means fit
+					# using percentage = 0 seems to fail for some reason...
+					w = "(if(percentage <= 0, 1, (width * percentage) / 100))"
+					h = "(height)"
+					name = "misc/logo.png"
+					resize_mode = "tile"
+				[/image]
+
+			[/draw]
+
+		[/state_enabled]
+
+	[/resolution]
+
+[/progress_bar_definition]
+

data/gui/default/window/title_screen.cfg

@@ -230,17 +230,58 @@
 		height = "(screen_height)"
 
 		[grid]
-
+	
 			[row]
 
 				[column]
-					vertical_alignment = "bottom"
+					horizontal_grow = "true"
-					{_GUI_TIP_SECTION}	
+					vertical_grow = "true"
-				[/column]
+
+					[stacked_widget]
+
+						[stack]
+
+							[layer]
+
+								[row]
+
+									[column]
+										vertical_alignment = "bottom"
+										{_GUI_TIP_SECTION}	
+									[/column]
+
+									[column]
+										horizontal_alignment = "right"
+										vertical_alignment = "bottom"
+										{_GUI_MENU_SECTION}
+									[/column]
+
+								[/row]
+
+							[/layer]
+
+							[layer]
+
+								[row]
+
+									[column]
+										vertical_alignment = "top"
+
+										[progress_bar]
+											id = "logo"
+											definition = "title_screen"
+										[/progress_bar]
+
+									[/column]
+
+								[/row]
+
+							[/layer]
+
+						[/stack]
+
+					[/stacked_widget]
 
-				[column]
-					horizontal_alignment = "right"
-					{_GUI_MENU_SECTION}
 				[/column]
 
 			[/row]

src/gui/dialogs/title_screen.cpp

@@ -17,13 +17,16 @@
 #include "gui/dialogs/title_screen.hpp"
 
 #include "game_config.hpp"
+#include "game_preferences.hpp"
 #include "gettext.hpp"
 #include "log.hpp"
+#include "gui/auxiliary/timer.hpp"
 #include "gui/dialogs/addon_connect.hpp"
 #include "gui/dialogs/language_selection.hpp"
 #include "gui/widgets/button.hpp"
 #include "gui/widgets/label.hpp"
 #include "gui/widgets/multi_page.hpp"
+#include "gui/widgets/progress_bar.hpp"
 #include "gui/widgets/settings.hpp"
 #include "gui/widgets/window.hpp"
 #include "titlescreen.hpp"
@@ -67,6 +70,7 @@ void show_dialog(CVideo& video)
  *     (source) (label) ()        The source for the tip of the day.
  *     (next_tip) (button) ()     The button show the next tip of day.
  *     (previous_tip) (button) () The button show the previous tip of day.
+ *     (logo) (progress_bar) ()   A progress bar to "animate" the image
  * @end_table
  */
 
@@ -75,10 +79,33 @@ REGISTER_WINDOW(title_screen)
 ttitle_screen::ttitle_screen()
 	: video_(NULL)
 	, tips_()
+	, logo_timer_id_(0)
 {
 	read_tips_of_day(tips_);
 }
 
+ttitle_screen::~ttitle_screen()
+{
+	if(logo_timer_id_) {
+		remove_timer(logo_timer_id_);
+	}
+}
+static void animate_logo(
+		  unsigned long& timer_id
+		, unsigned& percentage
+		, tprogress_bar& progress_bar)
+{
+	assert(percentage <= 100);
+	++percentage;
+	progress_bar.set_percentage(percentage);
+
+	if(percentage == 100) {
+		remove_timer(timer_id);
+		timer_id = 0;
+	}
+}
+
+
 void ttitle_screen::pre_show(CVideo& video, twindow& window)
 {
 	assert(!video_);
@@ -158,6 +185,27 @@ void ttitle_screen::pre_show(CVideo& video, twindow& window)
 		window.canvas()[0].set_variable("background_image",
 			variant(game_title_list[rand()%game_title_list.size()]));
 	}
+
+	/***** Set the logo *****/
+	tprogress_bar* logo =
+			find_widget<tprogress_bar>(&window, "logo", false, false);
+	if(logo) {
+		static unsigned percentage = preferences::startup_effect() ? 0 : 100;
+		logo->set_percentage(percentage);
+
+		if(percentage < 100) {
+			/*
+			 * The interval is empirically determined  so that the speed "felt"
+			 * good.
+			 */
+			logo_timer_id_ = add_timer(30
+					, boost::bind(animate_logo
+						, boost::ref(logo_timer_id_)
+						, boost::ref(percentage)
+						, boost::ref(*logo))
+					, true);
+		}
+	}
 }
 
 void ttitle_screen::post_show(twindow& /*window*/)

src/gui/dialogs/title_screen.hpp

@@ -26,6 +26,8 @@ class ttitle_screen : public tdialog
 public:
 	ttitle_screen();
 
+	~ttitle_screen();
+
 	CVideo* video() { return video_; }
 
 private:
@@ -44,6 +46,9 @@ private:
 	/** Hold the tips of the day. */
 	config tips_;
 
+	/** The progress bar time for the logo. */
+	unsigned long logo_timer_id_;
+
 	/**
 	 * Updates the tip of day widget.
 	 *