1 files changed, 96 insertions, 0 deletions
diff --git a/scrollbar.cc b/scrollbar.cc
new file mode 100644
index 0000000..9b42899
--- /dev/null
+++ b/scrollbar.cc
@@ -0,0 +1,96 @@
+// Copyright (C) 2003 Mooffie <mooffie@typo.co.il>
+//
+// This program 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; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program 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, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+
+#include <config.h>
+
+#include "scrollbar.h"
+#include "themes.h"
+
+Scrollbar::Scrollbar()
+{
+    create_window();
+    scrollok(wnd, 0);
+    total_size = 0;
+    page_size  = 0;
+    page_pos   = 0;
+    dirty = true;
+}
+
+void Scrollbar::set_page_size(int sz)
+{
+    if (sz != page_size) {
+	page_size = sz;
+	invalidate_view();
+    }
+}
+
+void Scrollbar::set_total_size(int sz)
+{
+    if (sz != total_size) {
+	total_size = sz;
+	invalidate_view();
+    }
+}
+
+void Scrollbar::set_page_pos(int pos)
+{
+    if (pos != page_pos) {
+	page_pos = pos;
+	invalidate_view();
+    }
+}
+
+void Scrollbar::update()
+{
+    if (!dirty)
+	return;
+
+    int thumb_pos = 0;
+    if (page_pos > 0)
+	thumb_pos = (int)((double(page_pos)/double(total_size))*window_height());
+    int thumb_size = (int)((double)page_size/double(total_size)*window_height()+1);
+    if (thumb_size > window_height())
+	thumb_size = window_height();
+    if (page_size >= total_size) // don't show if we don't have a reason
+	thumb_size = 0;
+    if (thumb_size == window_height())
+	thumb_size--;
+    if (page_pos + page_size >= total_size)
+	thumb_pos = window_height() - thumb_size;
+    
+    werase(wnd);
+    attribute_t base_attr  = get_attr(SCROLLBAR_ATTR);
+    attribute_t thumb_attr = get_attr(SCROLLBAR_THUMB_ATTR);
+    for (int i = 0; i < window_height(); i++) {
+	if (i >= thumb_pos && i < thumb_pos + thumb_size) {
+	    wattrset(wnd, thumb_attr);
+	    mvwhline(wnd, i, 0, ' ', 1);
+	} else {
+	    wattrset(wnd, base_attr);
+	    mvwhline(wnd, i, 0, terminal::graphical_boxes ? ACS_VLINE : '|', 1);
+	}
+    }    
+
+    wnoutrefresh(wnd);
+    dirty = false;
+}
+
+void Scrollbar::resize(int lines, int columns, int y, int x)
+{
+    Widget::resize(lines, columns, y, x);
+    invalidate_view();
+}
+