From 775cf2c4526dce9048361498197a3522d648f74c Mon Sep 17 00:00:00 2001
From: =?utf8?q?Thorsten=20Wi=C3=9Fmann?= <edu@thorsten-wissmann.de>
Date: Sat, 12 May 2012 16:07:50 +0200
Subject: [PATCH] Scroll whole list on mouse wheel action

This lets the whole list scroll on mouse action (button 5 and 6) instead
of just moving the selection. This also adds the scroll_speed option
that sets the number of lines the list is scrolled by.
---
 abookrc.5 |  5 +++++
 list.c    | 35 +++++++++++++++++++++++++++++++++++
 list.h    |  2 ++
 options.c |  1 +
 options.h |  1 +
 ui.c      |  4 ++--
 6 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/abookrc.5 b/abookrc.5
index db382e6..ba12c7c 100644
--- a/abookrc.5
+++ b/abookrc.5
@@ -150,6 +150,11 @@ Defines if the cursor is visible in main display. Default is false.
 \fBuse_mouse\fP=[true|false]
 Defines if navigation via the mouse is activated. Default is false. Most terminals can also inhibit ncurses mouse events at runtime by holding the Shift key (restoring mouse-selection behavior).
 
+.TP
+\fBscroll_speed\fP=lines
+Defines the number of lines the adress list is scrolled by on a mouse wheel
+action. This option only takes effect if use_mouse is enabled. Default is 2.
+
 .TP
 \fBuse_colors\fP=[true|false]
 Defines if the output of abook is colorized. Default is false.
diff --git a/list.c b/list.c
index ca4892b..7357467 100644
--- a/list.c
+++ b/list.c
@@ -24,6 +24,7 @@
 
 int curitem = -1;
 int first_list_item = -1;
+int scroll_speed = 2;
 char *selected = NULL;
 
 extern abook_field_list *fields_list;
@@ -130,6 +131,7 @@ init_list()
 {
 	list = newwin(LIST_LINES, LIST_COLS, LIST_TOP, 0);
 	scrollok(list, TRUE);
+	scroll_speed = abs(opt_get_int(INT_SCROLL_SPEED));
 }
 
 void
@@ -352,6 +354,39 @@ scroll_down()
 	refresh_list();
 }
 
+void
+scroll_list_up()
+{
+	if(first_list_item <= 0)
+		return;
+
+	first_list_item -= scroll_speed;
+	if(first_list_item < 0) {
+		first_list_item = 0;
+	}
+	if(curitem > LAST_LIST_ITEM) {
+		curitem = LAST_LIST_ITEM;
+	}
+
+	refresh_list();
+}
+
+void
+scroll_list_down()
+{
+	if(first_list_item > db_n_items() - 2)
+		return;
+
+	first_list_item += scroll_speed;
+	if(first_list_item >= db_n_items()) {
+		first_list_item = db_n_items() - 1;
+	}
+	if(curitem < first_list_item) {
+		curitem = first_list_item;
+	}
+
+	refresh_list();
+}
 
 void
 page_up()
diff --git a/list.h b/list.h
index 0cc3113..35befc5 100644
--- a/list.h
+++ b/list.h
@@ -34,6 +34,8 @@ void	get_list_field(int item, struct index_elem *e, struct list_field *res);
 void		list_headerline();
 void            scroll_up();
 void            scroll_down();
+void            scroll_list_up();
+void            scroll_list_down();
 void		page_up();
 void		page_down();
 void            select_none();
diff --git a/options.c b/options.c
index 2c1303c..6f75a06 100644
--- a/options.c
+++ b/options.c
@@ -68,6 +68,7 @@ static struct option abook_vars[] = {
 	{ "sort_field", OT_STR, STR_SORT_FIELD, UL "nick" },
 	{ "show_cursor", OT_BOOL, BOOL_SHOW_CURSOR, FALSE },
 	{ "use_mouse", OT_BOOL, BOOL_USE_MOUSE, FALSE },
+	{ "scroll_speed", OT_INT, INT_SCROLL_SPEED, UL 2 },
 	{ "use_colors", OT_BOOL, BOOL_USE_COLORS, FALSE },
 	{ "color_header_fg", OT_STR, STR_COLOR_HEADER_FG, UL "blue" },
 	{ "color_header_fg", OT_STR, STR_COLOR_HEADER_FG, UL "blue" },
diff --git a/options.h b/options.h
index d2cc8c0..78515a9 100644
--- a/options.h
+++ b/options.h
@@ -38,6 +38,7 @@ enum bool_opts {
 enum int_opts {
 	INT_EMAILPOS,
 	INT_EXTRAPOS,
+	INT_SCROLL_SPEED,
 	INT_MAXIMUM /* INT_MAX conflicts on some systems */
 };
 
diff --git a/ui.c b/ui.c
index 158f2ed..4efcf85 100644
--- a/ui.c
+++ b/ui.c
@@ -556,9 +556,9 @@ get_commands()
 						refresh_list();
 					}
 				} else if(event.bstate & BUTTON4_PRESSED) {
-					scroll_up();
+					scroll_list_up();
 				} else if(event.bstate & BUTTON5_PRESSED) {
-					scroll_down();
+					scroll_list_down();
 				}
 			}
 		}
-- 
2.39.5