From 7dd94e3415b1d65c251c80d012f16ad183b38e7d Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sat, 9 Mar 2013 13:52:47 +0100
Subject: Add scollwheel support for knob widget.

---
 plugingui/knob.cc | 11 +++++++++++
 plugingui/knob.h  |  1 +
 2 files changed, 12 insertions(+)

diff --git a/plugingui/knob.cc b/plugingui/knob.cc
index 75a7278..d60ecc4 100644
--- a/plugingui/knob.cc
+++ b/plugingui/knob.cc
@@ -64,6 +64,17 @@ void GUI::Knob::registerClickHandler(void (*handler)(void *), void *ptr)
   this->ptr = ptr;
 }
 
+void GUI::Knob::scrollEvent(ScrollEvent *e)
+{
+  val -= e->delta / 200.0;
+  if(val < 0) val = 0;
+  if(val > 1) val = 1;
+
+  if(handler) handler(ptr);
+
+  repaintEvent(NULL);
+}
+
 void GUI::Knob::mouseMoveEvent(MouseMoveEvent *e)
 {
   if(state == down) {
diff --git a/plugingui/knob.h b/plugingui/knob.h
index 98ccf36..a78361b 100644
--- a/plugingui/knob.h
+++ b/plugingui/knob.h
@@ -48,6 +48,7 @@ public:
   virtual void repaintEvent(RepaintEvent *e);
   virtual void buttonEvent(ButtonEvent *e);
   virtual void mouseMoveEvent(MouseMoveEvent *e);
+  virtual void scrollEvent(ScrollEvent *e);
 
 private:
   typedef enum {
-- 
cgit v1.2.3