Make ~/, round, ceil, floor, truncate return ints. Remove toInt.

samples/spirodraw/Spirodraw.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library spirodraw;
 
 import 'dart:html';
 import 'dart:math' as Math;
 
 part "ColorPicker.dart";
@@ skipping 84 matching lines @@
     penColor = color;
     drawFrame(rad);
   }
 
   void onSpeedChange() {
     speed = speedSlider.valueAsNumber;
     stepSize = calcStepSize();
   }
 
   void onPenWidthChange() {
-    penWidth = penWidthSlider.valueAsNumber.toInt();
+    penWidth = penWidthSlider.valueAsNumber.truncate();
     drawFrame(rad);
   }
 
   void refresh() {
     stop();
     // Reset
     lastX = lastY = 0;
     // Compute fixed radius
     // based on starting diameter == min / 2, fixed radius == 10 units
     int min = Math.min(height, width);
     double pixelsPerUnit = min / 40;
-    RUnits = fixedRadiusSlider.valueAsNumber.toInt();
+    RUnits = fixedRadiusSlider.valueAsNumber.truncate();
     R = RUnits * pixelsPerUnit;
     // Scale inner radius and pen distance in units of fixed radius
-    rUnits = wheelRadiusSlider.valueAsNumber.toInt();
+    rUnits = wheelRadiusSlider.valueAsNumber.truncate();
     r = rUnits * R/RUnits * int.parse(inOrOut.value);
-    dUnits = penRadiusSlider.valueAsNumber.toInt();
+    dUnits = penRadiusSlider.valueAsNumber.truncate();
     d = dUnits * R/RUnits;
     numPoints = calcNumPoints();
     maxTurns = calcTurns();
     onSpeedChange();
     numTurns.text = "0 / ${maxTurns}";
-    penWidth = penWidthSlider.valueAsNumber.toInt();
+    penWidth = penWidthSlider.valueAsNumber.truncate();
     drawFrame(0.0);
   }
 
   int calcNumPoints() {
     // Empirically, treat it like an oval.
     if (dUnits == 0 || rUnits == 0) return 2;
 
     int gcf_ = gcf(RUnits, rUnits);
     int n = RUnits ~/ gcf_;
     int d_ = rUnits ~/ gcf_;
@@ skipping 11 matching lines @@
            ..drawImage(backCanvas, 0, 0);
       drawFixed();
     }
     drawWheel(theta);
   }
 
   void animate(double time) {
     if (run && rad <= maxTurns * PI2) {
       rad+=stepSize;
       drawFrame(rad);
-      int nTurns = (rad / PI2).toInt();
+      int nTurns = (rad / PI2).truncate();

[Lasse Reichstein Nielsen, 2013/01/04 10:29:42]

/ -> ~/ ?

[floitsch, 2013/03/11 13:39:15]

done in different CL.

       numTurns.text = '${nTurns}/$maxTurns';
       window.requestAnimationFrame(animate);
     } else {
       stop();
     }
   }
 
   void start() {
     refresh();
     rad = 0.0;
     run = true;
     window.requestAnimationFrame(animate);
   }
 
   int calcTurns() {
     // compute ratio of wheel radius to big R then find LCM
     if ((dUnits==0) || (rUnits==0)) return 1;
     int ru = rUnits.abs();
     int wrUnits = RUnits + rUnits;
     int g = gcf (wrUnits, ru);
-    return (ru ~/ g).toInt();
+    return ru ~/ g;
   }
 
   void stop() {
     run = false;
     // Show drawing only
     front..clearRect(0, 0, width, height)
          ..drawImage(backCanvas, 0, 0);
     // Reset angle
     rad = 0.0;
   }
@@ skipping 103 matching lines @@
 }
 
 int gcf(int n, int d) {
   if (n == d) return n;
   int max = Math.max(n, d);
   for (int i = max ~/ 2; i > 1; i--) {
     if ((n % i == 0) && (d % i == 0)) return i;
   }
   return 1;
 }