changeset 664:62330d542e1d

Do not pad edges of scale extent when auto-aligning to another layer

--- a/layer/TimeValueLayer.cpp	Thu May 16 15:00:20 2013 +0100
+++ b/layer/TimeValueLayer.cpp	Tue Jul 16 13:22:31 2013 +0100
@@ -746,13 +746,18 @@
     max = 0.0;
     log = false;
 
+    bool haveAutoAlignment = false;
+
     if (shouldAutoAlign()) {
 
         if (!v->getValueExtents(m_model->getScaleUnits(), min, max, log)) {
             min = m_model->getValueMinimum();
             max = m_model->getValueMaximum();
-        } else if (log) {
-            LogRange::mapRange(min, max);
+        } else {
+            haveAutoAlignment = true;
+            if (log) {
+                LogRange::mapRange(min, max);
+            }
         }
 
     } else if (m_verticalScale == PlusMinusOneScale) {
@@ -774,18 +779,21 @@
     std::cerr << "TimeValueLayer::getScaleExtents: min = " << min << ", max = " << max << std::endl;
 #endif
 
-    if (max == min) {
-        max = max + 0.5;
-        min = min - 0.5;
-    } else {
-        float margin = (max - min) / 10.0;
-        max = max + margin;
-        min = min - margin;
-    }
+    if (!haveAutoAlignment) {
+
+        if (max == min) {
+            max = max + 0.5;
+            min = min - 0.5;
+        } else {
+            float margin = (max - min) / 10.0;
+            max = max + margin;
+            min = min - margin;
+        }
 
 #ifdef DEBUG_TIME_VALUE_LAYER
-    std::cerr << "TimeValueLayer::getScaleExtents: min = " << min << ", max = " << max << " (after adjustment)" << std::endl;
+        std::cerr << "TimeValueLayer::getScaleExtents: min = " << min << ", max = " << max << " (after adjustment)" << std::endl;
 #endif
+    }
 }
 
 int