From e2ca0ebd2ce27210e921326e26820048e8efa5c4 Mon Sep 17 00:00:00 2001
From: Jesse van den Kieboom <jessevdk@gmail.com>
Date: Sat, 30 Sep 2006 14:20:20 +0000
Subject: [PATCH] 	* gnoemoe/mcp/gm-mcp-userlist-view.c: keep userlist at
 the current 	scroll position at all times (fixes #3)

---
 gnoemoe/mcp/gm-mcp-userlist-view.c | 68 +++++++++++++++++++++++++++++-
 1 file changed, 67 insertions(+), 1 deletion(-)

diff --git a/gnoemoe/mcp/gm-mcp-userlist-view.c b/gnoemoe/mcp/gm-mcp-userlist-view.c
index 18d3f2e..18fb1cf 100644
--- a/gnoemoe/mcp/gm-mcp-userlist-view.c
+++ b/gnoemoe/mcp/gm-mcp-userlist-view.c
@@ -32,6 +32,9 @@ typedef struct _GmMcpUserlistView {
 	gint num_active;
 	
 	GdkColor status_color;
+	
+	gdouble scroll_position;
+	gulong idle_scroll;
 } GmMcpUserlistView;
 
 static void on_gm_mcp_userlist_view_weak_notify(gpointer data, GObject *obj);
@@ -79,6 +82,48 @@ static GmUserlistCompareFunc compare_functions[] = {
 	gm_mcp_userlist_view_sort_name
 };
 
+static gboolean
+gm_mcp_userlist_view_idle_scroll(GmMcpUserlistView *view) {
+	GtkAdjustment *adj;
+
+	view->idle_scroll = 0;
+	adj = gtk_scrolled_window_get_vadjustment(view->scrolled_window);
+	gtk_adjustment_set_value(adj, view->scroll_position);
+	
+	return FALSE;
+}
+
+static void
+gm_mcp_userlist_view_prepare_scroll(GmMcpUserlistView *view) {
+	GtkAdjustment *adj;
+
+	if (view->idle_scroll != 0)
+		return;
+	
+	adj = gtk_scrolled_window_get_vadjustment(view->scrolled_window);
+	
+	view->scroll_position = gtk_adjustment_get_value(adj);
+	view->idle_scroll = g_idle_add((GSourceFunc)(gm_mcp_userlist_view_idle_scroll), view);
+}
+
+static void
+on_rows_reordered(GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter,
+		gpointer arg3, GmMcpUserlistView *view) {
+	gm_mcp_userlist_view_prepare_scroll(view);
+}
+
+static void
+on_row_inserted(GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter,
+		GmMcpUserlistView *view) {
+	gm_mcp_userlist_view_prepare_scroll(view);	
+}
+
+static void
+on_row_deleted(GtkTreeModel *model, GtkTreePath *path, 
+		GmMcpUserlistView *view) {
+	gm_mcp_userlist_view_prepare_scroll(view);		
+}
+
 GtkTreeModel *
 gm_mcp_userlist_view_model_create(GmMcpUserlistView *view) {
 	GtkListStore *store = gtk_list_store_new(GM_USERLIST_N_COLUMNS, 
@@ -89,6 +134,16 @@ gm_mcp_userlist_view_model_create(GmMcpUserlistView *view) {
 
 	view->store = store;
 	view->model = model;
+
+	g_signal_connect(model, "row-inserted",
+			G_CALLBACK(on_row_inserted),
+			view);
+	g_signal_connect(model, "row-deleted",
+			G_CALLBACK(on_row_deleted),
+			view);
+	g_signal_connect(model, "rows-reordered",
+			G_CALLBACK(on_rows_reordered),
+			view);
 	
 	return model;
 }
@@ -211,6 +266,15 @@ gm_mcp_userlist_view_create_label(GmMcpUserlistView *view) {
 	return view->label;
 }
 
+static void
+on_adj_changed(GtkAdjustment *adj, GmMcpUserlistView *view) {
+	if (view->idle_scroll != 0 && gtk_adjustment_get_value(adj) != view->scroll_position) {
+		gtk_adjustment_set_value(adj, view->scroll_position);
+		g_source_remove(view->idle_scroll);
+		view->idle_scroll = 0;
+	}
+}
+
 GtkWidget *
 gm_mcp_userlist_view_create_userlist(GmMcpUserlistView *view) {
 	GtkWidget *scrolled_window = gtk_scrolled_window_new(NULL, NULL);
@@ -224,6 +288,9 @@ gm_mcp_userlist_view_create_userlist(GmMcpUserlistView *view) {
 	gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scrolled_window),
 			GTK_SHADOW_IN);
 
+	GtkAdjustment *adj = gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(scrolled_window));
+	g_signal_connect(adj, "changed", G_CALLBACK(on_adj_changed), view);
+
 	gtk_widget_set_size_request(scrolled_window, 150, -1);
 	gtk_widget_set_size_request(tree_view, 150, -1);
 	
@@ -592,7 +659,6 @@ on_gm_mcp_userlist_view_player_removed(GmMcpPackage *package, gint id,
 	}
 	
 	gm_mcp_userlist_view_update_label(view);
-
 	gtk_list_store_remove(view->store, &iter);
 }