print stack

Signed-off-by: fufesou <shuanglongchen@yeah.net>

flutter/lib/models/input_model.dart

@@ -503,8 +503,21 @@ class InputModel {
     }
     x += d.x;
     y += d.y;
+    var evtX = 0;
+    var evtY = 0;
+    try {
+      x.round();
+      y.round();
+    } catch (e) {
+      debugPrintStack(
+          label: 'canvasModel.scale value ${canvasModel.scale}, $e');
+      return;
+    }
 
-    if (x < d.x || y < d.y || x > (d.x + d.width) || y > (d.y + d.height)) {
+    if (evtX < d.x ||
+        evtY < d.y ||
+        evtX > (d.x + d.width) ||
+        evtY > (d.y + d.height)) {
       // If left mouse up, no early return.
       if (evt['buttons'] != kPrimaryMouseButton || type != 'up') {
         return;
@@ -512,12 +525,12 @@ class InputModel {
     }
 
     if (type != '') {
-      x = 0;
-      y = 0;
+      evtX = 0;
+      evtY = 0;
     }
 
-    evt['x'] = '${x.round()}';
-    evt['y'] = '${y.round()}';
+    evt['x'] = '$evtX';
+    evt['y'] = '$evtY';
     var buttons = '';
     switch (evt['buttons']) {
       case kPrimaryMouseButton:

flutter/lib/models/model.dart

@@ -803,7 +803,9 @@ class CanvasModel with ChangeNotifier {
         dyOffset = (y - dh * (y / size.height) - _y).toInt();
       }
     } catch (e) {
-      // Unhandled Exception: Unsupported operation: Infinity or NaN toInt
+      debugPrintStack(
+          label:
+              '(x,y) ($x,$y), (_x,_y) ($_x,$_y), _scale $_scale, display size (${getDisplayWidth()},${getDisplayHeight()}), size $size, , $e');
       return;
     }