From af00fd0f2f6bf5d8d1b9368397001f689abf09ed Mon Sep 17 00:00:00 2001
From: Mark de Wever <koraq@xs4all.nl>
Date: Sat, 28 Apr 2012 19:16:13 +0000
Subject: [PATCH] Add a move function for widgets.

The code is used to experiment with a different approach of the
implementation of a listbox.
---
 src/gui/widgets/widget.cpp |  6 ++++++
 src/gui/widgets/widget.hpp | 14 ++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/gui/widgets/widget.cpp b/src/gui/widgets/widget.cpp
index 5c181941835..c9096b5e595 100644
--- a/src/gui/widgets/widget.cpp
+++ b/src/gui/widgets/widget.cpp
@@ -156,6 +156,12 @@ SDL_Rect twidget::get_dirty_rect() const
 			: clip_rect_;
 }
 
+void twidget::move(const int x_offset, const int y_offset)
+{
+	x_ += x_offset;
+	y_ += y_offset;
+}
+
 twindow* twidget::get_window()
 {
 	// Go up into the parent tree until we find the top level
diff --git a/src/gui/widgets/widget.hpp b/src/gui/widgets/widget.hpp
index 730436e6c1b..231b3c83a98 100644
--- a/src/gui/widgets/widget.hpp
+++ b/src/gui/widgets/widget.hpp
@@ -409,6 +409,20 @@ public:
 		y_ = origin.y;
 	}
 
+	/**
+	 * Moves a widget.
+	 *
+	 * This function can be used to move the widget without dirtying it.
+	 *
+	 * @todo Implement the function to all inherited classes.
+	 *
+	 * @param x_offset            The amount of pixels to move the widget in
+	 *                            the x direction.
+	 * @param y_offset            The amount of pixels to move the widget in
+	 *                            the y direction.
+	 */
+	virtual void move(const int x_offset, const int y_offset);
+
 	int get_x() const { return x_; }
 
 	int get_y() const { return y_; }