1 files changed, 90 insertions, 0 deletions
diff --git a/desktop/scroll.h b/desktop/scroll.h
new file mode 100644
index 000000000..f0569c37f
--- /dev/null
+++ b/desktop/scroll.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2009 Paul Blokus <paul_pl@users.sourceforge.net>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file
+ * Scroll widget (interface).
+ */
+
+#ifndef _NETSURF_DESKTOP_SCROLL_H_
+#define _NETSURF_DESKTOP_SCROLL_H_
+
+#include <stdbool.h>
+
+#include "desktop/browser.h"
+
+#define SCROLLBAR_WIDTH 16
+
+struct scroll;
+
+typedef enum {
+	SCROLL_MSG_REDRAW,		/* the scrollbar requests a redraw */
+	SCROLL_MSG_MOVED,		/* the scroll value has changed */
+	SCROLL_MSG_SCROLL_START,	/* a scroll drag has started, all mouse
+ 					 * events should be passed to
+					 * the scrollbar regardless of the
+					 * coordinates
+					 */
+	SCROLL_MSG_SCROLL_FINISHED,	/* cancel the above */
+			
+} scroll_msg;
+
+struct scroll_msg_data {
+	struct scroll *scroll;
+	scroll_msg msg;
+	int new_scroll;
+	int x0, y0, x1, y1;
+};
+
+/**
+ * Client callback for the scroll.
+ * 
+ * \param client_data	user data passed at scroll creation
+ * \param scroll_data	struct all necessary message data
+ */
+typedef void(*scroll_client_callback)(void *client_data,
+		struct scroll_msg_data *scroll_data);
+
+bool scroll_create(bool horizontal, int length,
+		int scrolled_dimension, int scrolled_visible,
+  		void *client_data, scroll_client_callback client_callback,
+    		struct scroll **scroll_pt);
+void scroll_destroy(struct scroll *scroll);
+bool scroll_redraw(struct scroll *scroll, int x, int y,
+		int clip_x0, int clip_y0, int clip_x1, int clip_y1,
+		float scale);
+		
+void scroll_set(struct scroll *scroll, int scroll_val, bool bar);
+int scroll_get_offset(struct scroll *scroll);
+
+void scroll_set_length_and_visible(struct scroll *scroll, int length,
+		int scrolled_visible);
+
+bool scroll_is_horizontal(struct scroll *scroll);
+
+const char *scroll_mouse_action(struct scroll *scroll,
+		browser_mouse_state mouse, int x, int y);
+void scroll_mouse_drag_end(struct scroll *scroll, browser_mouse_state mouse,
+		int x, int y);
+void scroll_start_content_drag(struct scroll *scroll, int x, int y);
+
+void scroll_make_pair(struct scroll *horizontal_scroll,
+		struct scroll *vertical_scroll);
+
+void *scroll_get_data(struct scroll *scroll);
+
+#endif