comparison widgets/Panner.cpp @ 1238:4d0ca1ab4cd0

Some work to make spectrum layers (and slice layers generally) zoomable in the frequency axis. Also fixes a number of view id mixups in SliceLayer which broke offset calculations for the x axis scale.

 
 #include <QMouseEvent>
 #include <QPaintEvent>
 #include <QWheelEvent>
 #include <QPainter>
+
+#include "WidgetScale.h"
 
 #include <iostream>
 #include <cmath>
 
 Panner::Panner(QWidget *parent) :

     paint.setRenderHint(QPainter::Antialiasing, false);
 
     QColor bg(palette().background().color());
     bg.setAlpha(m_backgroundAlpha);
 
-    paint.setPen(palette().dark().color());
+    int penWidth = WidgetScale::scalePixelSize(1);
+    if (penWidth < 1) penWidth = 1;
+    paint.setPen(QPen(palette().dark().color(), penWidth));
+    
     paint.setBrush(bg);
-    paint.drawRect(0, 0, width()-1, height()-1);
+    paint.drawRect(penWidth/2, penWidth/2,
+                   width()-penWidth/2-1, height()-penWidth/2-1);
 
     QColor hl(m_thumbColour);
     hl.setAlpha(m_thumbAlpha);
 
     paint.setBrush(hl);