From 361e29c776e325b7c26379fcc5527466c9fa3696 Mon Sep 17 00:00:00 2001
From: Werner Schweer <ws.seh.de>
Date: Fri, 9 Jun 2006 09:07:53 +0000
Subject: fix controller editing

---
 muse/muse/ctrl.cpp            |  4 ++--
 muse/muse/ctrl/ctrleditor.cpp | 11 +++++++----
 muse/muse/ctrl/ctrleditor.h   |  3 +++
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/muse/muse/ctrl.cpp b/muse/muse/ctrl.cpp
index 4fc2514d..12f8a2e6 100644
--- a/muse/muse/ctrl.cpp
+++ b/muse/muse/ctrl.cpp
@@ -331,7 +331,7 @@ void Ctrl::write(Xml& xml)
 int Ctrl::val2pixelR(CVal val, int maxpixel)
       {
       if (_type & INT)
-            return maxpixel - (maxpixel * (val.i - min.i) / (max.i-min.i));
+            return maxpixel - ((maxpixel * (val.i - min.i) + (max.i-min.i)/2) / (max.i-min.i));
       else
             return maxpixel - lrint(float(maxpixel) * (val.f - min.f) / (max.f-min.f));
       }
@@ -356,7 +356,7 @@ CVal Ctrl::pixel2val(int pixel, int maxpixel)
 //   pixel, maxpixel, _type & INT, min.i, max.i);
       CVal rv;
       if (_type & INT) {
-            rv.i = pixel * (max.i - min.i) / maxpixel + min.i;
+            rv.i = (pixel * (max.i - min.i) + (maxpixel+min.i)/2) / maxpixel + min.i;
             if (rv.i < min.i)
                   rv.i = min.i;
             else if (rv.i > max.i)
diff --git a/muse/muse/ctrl/ctrleditor.cpp b/muse/muse/ctrl/ctrleditor.cpp
index ec12f872..e0e1db3b 100644
--- a/muse/muse/ctrl/ctrleditor.cpp
+++ b/muse/muse/ctrl/ctrleditor.cpp
@@ -212,6 +212,7 @@ void CtrlEditor::mousePress(const QPoint& pos, int button)
             ciCtrlVal e = ctrl()->upper_bound(pos2.time(tt));
             for (ciCtrlVal i = s; i != e; ++i) {
                   int yy = ctrl()->val2pixelR(i->second, wh);
+                  startY = yy;
                   if ((yy >= (y-HANDLE2)) && (yy < (y + HANDLE2))) {
                         if (tt == AL::TICKS)
                               selected.setTick(i->first);
@@ -222,8 +223,10 @@ void CtrlEditor::mousePress(const QPoint& pos, int button)
                               song->removeControllerVal(ctrlTrack(), ctrl()->id(), i->first);
                               dragy = -1;
                               }
-                        else
+                        else {
                               dragy = yy;
+                              dragYoffset = dragy - y;
+                              }
                         tc()->widget()->update();
                         break;
                         }
@@ -302,8 +305,8 @@ void CtrlEditor::mouseRelease()
       if (ctrl()->id() == CTRL_VELOCITY || ctrl()->id() == CTRL_SVELOCITY)
             song->endUndo(SC_EVENT_MODIFIED);
       else {
-            if (dragy != -1) {
-                  int wh = cheight();
+            if (dragy != -1 && dragy != startY) {
+                  int wh   = cheight();
                   CVal val = ctrl()->pixel2val(dragy, wh);
                   // modify controller:
                   song->addControllerVal(ctrlTrack(), ctrl(), selected, val);
@@ -371,7 +374,7 @@ void CtrlEditor::mouseMove(const QPoint& pos)
             }
       else {
             if (dragy != -1)
-                  dragy = pos.y();
+                  dragy = pos.y() + dragYoffset;
             }
       tc()->widget()->update();
       }
diff --git a/muse/muse/ctrl/ctrleditor.h b/muse/muse/ctrl/ctrleditor.h
index e066431f..d0f2152e 100644
--- a/muse/muse/ctrl/ctrleditor.h
+++ b/muse/muse/ctrl/ctrleditor.h
@@ -34,6 +34,9 @@ class Track;
 class CtrlEditor {
       bool _drawCtrlName;
       int dragx, dragy;
+      int dragYoffset;
+      int startY;
+
       int lselected;    // cached pixel position of current value
       AL::Pos selected; // current selected controller value
 
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