Add a tooltip mode for a dialog.

The code is still a bit experimental, but like to have it committed
before the FOSDEM.

src/gui/dialogs/dialog.cpp

@@ -29,6 +29,8 @@ tdialog::~tdialog()
 	foreach(tfield_* field, fields_) {
 		delete field;
 	}
+
+	delete window_;
 }
 
 void tdialog::show(CVideo& video, const unsigned auto_close_time)
@@ -71,6 +73,25 @@ void tdialog::show(CVideo& video, const unsigned auto_close_time)
 	post_show(*window);
 }
 
+void tdialog::show_tooltip(CVideo& video/*, const unsigned auto_close_time*/)
+{
+	if(video.faked()) {
+		return;
+	}
+
+	window_ = build_window(video);
+
+	post_build(video, *window_);
+
+	window_->set_owner(this);
+
+	init_fields(*window_);
+
+	pre_show(video, *window_);
+
+	window_->show_tooltip(/*auto_close_time*/);
+}
+
 tfield_bool* tdialog::register_bool(
 		  const std::string& id
 		, const bool optional

src/gui/dialogs/dialog.hpp

@@ -90,7 +90,8 @@ public:
 	tdialog() :
 		retval_(0),
 		fields_(),
-		restore_(true)
+		restore_(true),
+		window_(NULL)
 	{}
 
 	virtual ~tdialog();
@@ -108,6 +109,21 @@ public:
 	 */
 	void show(CVideo& video, const unsigned auto_close_time = 0);
 
+	/**
+	 * Shows the window as a tooltip.
+	 *
+	 * A tooltip can't be interacted with and is just shown.
+	 *
+	 * @todo Implement @p auto_close_time.
+	 *
+	 * @todo Look at merging @ref show and @ref show_tooltip. Maybe more types
+	 * are needed, have a look at it later.
+	 *
+	 * @param video               The video which contains the surface to draw
+	 *                            upon.
+	 */
+	void show_tooltip(CVideo& video/*, const unsigned auto_close_time = 0*/);
+
 	/***** ***** ***** setters / getters for members ***** ****** *****/
 
 	int get_retval() const { return retval_; }
@@ -182,6 +198,9 @@ private:
 	 */
 	bool restore_;
 
+	/** The window, used in show modal. */
+	twindow* window_;
+
 	/** The id of the window to build. */
 	virtual const std::string& window_id() const = 0;
 

src/gui/widgets/window.cpp

@@ -378,6 +378,7 @@ void twindow::update_screen_size()
 		}
 	}
 }
+
 twindow::tretval twindow::get_retval_by_id(const std::string& id)
 {
 /*WIKI
@@ -440,6 +441,23 @@ twindow::tretval twindow::get_retval_by_id(const std::string& id)
 	}
 }
 
+void twindow::show_tooltip(/*const unsigned auto_close_timeout*/)
+{
+	log_scope2(log_gui_draw, "Window: show as tooltip.");
+
+	generate_dot_file("show", SHOW);
+
+	assert(status_ == NEW);
+
+	/*
+	 * Before show has been called, some functions might have done some testing
+	 * on the window and called layout, which can give glitches. So
+	 * reinvalidate the window to avoid those glitches.
+	 */
+	invalidate_layout();
+	suspend_drawing_ = false;
+}
+
 int twindow::show(const bool restore, const unsigned auto_close_timeout)
 {
 	/**
@@ -508,6 +526,15 @@ int twindow::show(const bool restore, const unsigned auto_close_timeout)
 
 		delay_event(event, auto_close_timeout);
 	}
+
+	/** @todo Evaluate whether capturing can be done cleaner. */
+	/*
+	 * Capture the input. This way a tooltip shown doesn't grab the focus if
+	 * drawn above us. This also means the window shown is always modal.
+	 */
+	capture_keyboard(dynamic_cast<gui2::event::tdispatcher*>(this));
+	event::capture_mouse(dynamic_cast<gui2::event::tdispatcher*>(this));
+
 	try {
 		// Start our loop drawing will happen here as well.
 		for(status_ = SHOWING; status_ != REQUEST_CLOSE; ) {

src/gui/widgets/window.hpp

@@ -142,6 +142,21 @@ public:
 	int show(const bool restore = true,
 			const unsigned auto_close_timeout = 0);
 
+	/**
+	 * Shows the window as a tooltip.
+	 *
+	 * A tooltip can't be interacted with and is just shown.
+	 *
+	 * @todo implement @p auto_close_timeout.
+	 *
+	 * @param auto_close_timeout  The time in ms after which the window will
+	 *                            automatically close, if 0 it doesn't close.
+	 *                            @note the timeout is a minimum time and
+	 *                            there's no quarantee about how fast it closes
+	 *                            after the minimum.
+	 */
+	void show_tooltip(/*const unsigned auto_close_timeout = 0*/);
+
 	/**
 	 * Draws the window.
 	 *