From 97875da492c6f64b00441206c4b0df51dbd91c38 Mon Sep 17 00:00:00 2001
From: Peter Braden <peterbraden@peterbraden.co.uk>
Date: Wed, 15 Oct 2014 20:31:19 +0200
Subject: [PATCH] fix window error

---
 examples/camera.js                   | 8 ++++++--
 examples/face-detection-rectangle.js | 8 ++++----
 src/HighGUI.cc                       | 8 +++++++-
 3 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/examples/camera.js b/examples/camera.js
index abe885b..25b0246 100755
--- a/examples/camera.js
+++ b/examples/camera.js
@@ -2,11 +2,15 @@ var cv = require('../lib/opencv');
 
 var camera = new cv.VideoCapture(0);
 var window = new cv.NamedWindow('Video', 0)
-
+/*
 setInterval(function() {
   camera.read(function(err, im) {
     if (err) throw err;
-    window.show(im);
+    console.log(im.size())
+    if (im.size()[0] > 0 && im.size()[1] > 0){
+      window.show(im);
+    }
     window.blockingWaitKey(0, 50);
   });
 }, 20);
+*/
diff --git a/examples/face-detection-rectangle.js b/examples/face-detection-rectangle.js
index f108eee..e2d4f87 100755
--- a/examples/face-detection-rectangle.js
+++ b/examples/face-detection-rectangle.js
@@ -3,11 +3,11 @@ var cv = require('../lib/opencv');
 var COLOR = [0, 255, 0]; // default red
 var thickness = 2; // default 1
 
-cv.readImage('./files/mona.png', function(err, im) {
+cv.readImage('./examples/files/mona.png', function(err, im) {
   if (err) throw err;
   if (im.width() < 1 || im.height() < 1) throw new Error('Image has no size');
 
-  im.detectObject('../data/haarcascade_frontalface_alt2.xml', {}, function(err, faces) {
+  im.detectObject('./data/haarcascade_frontalface_alt2.xml', {}, function(err, faces) {
     if (err) throw err;
 
     for (var i = 0; i < faces.length; i++) {
@@ -15,8 +15,8 @@ cv.readImage('./files/mona.png', function(err, im) {
       im.rectangle([face.x, face.y], [face.x + face.width, face.y + face.height], COLOR, 2);
     }
 
-    im.save('./tmp/face-detection-rectangle.png');
-    console.log('Image saved to ./tmp/face-detection-rectangle.png');
+    im.save('./examples/tmp/face-detection-rectangle.png');
+    console.log('Image saved to ./examples/tmp/face-detection-rectangle.png');
   });
 
 });
diff --git a/src/HighGUI.cc b/src/HighGUI.cc
index bb1197b..3b99c9e 100644
--- a/src/HighGUI.cc
+++ b/src/HighGUI.cc
@@ -53,7 +53,13 @@ NamedWindow::NamedWindow(const std::string& name, int f){
 NAN_METHOD(NamedWindow::Show){
 	SETUP_FUNCTION(NamedWindow)
   Matrix *im = ObjectWrap::Unwrap<Matrix>(args[0]->ToObject());
-  cv::imshow(self->winname, im->mat);
+
+  try{
+    cv::imshow(self->winname, im->mat);
+  } catch(cv::Exception& e ){
+    const char* err_msg = e.what();
+    NanThrowError(err_msg);
+  }
 
 	NanReturnValue(args.Holder());
 }