From a64653971971ac342ffe1cfdd7b731451a4d4cf0 Mon Sep 17 00:00:00 2001
From: Jan Philipp Timme <jan.philipp@timme.it>
Date: Sun, 20 Dec 2015 17:46:24 +0100
Subject: [PATCH] [TASK] Add parameters to canny edge.

---
 imageviewer-qt4.cpp | 28 ++++++++++++++++++++++++++--
 imageviewer-qt4.h   |  6 +++++-
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/imageviewer-qt4.cpp b/imageviewer-qt4.cpp
index 316b6f6..88fe15e 100644
--- a/imageviewer-qt4.cpp
+++ b/imageviewer-qt4.cpp
@@ -650,8 +650,13 @@ void ImageViewer::applyBasicFilterWithOverflowHandling() {
  */
 void ImageViewer::runCannyEdge(void) {
   CannyEdgeMachine cem = CannyEdgeMachine(original, working_copy);
-  cem.setGaussFilterSize(3);
-  cem.setThresholdValues(2.5, 3.5); //TODO
+  int filter_size = gauss_filter_size->value();
+  double t_low = t_low_spinbox->value();
+  double t_high = t_high_spinbox->value();
+  logFile << "Canny-Edge using N*N filter size: " << filter_size << ", and thresholds: " << t_low << ", " << t_high << std::endl;
+  renewLogging();
+  cem.setGaussFilterSize(filter_size);
+  cem.setThresholdValues(t_low, t_high);
   cem.work();
   updateImageDisplay();  
 }
@@ -919,6 +924,25 @@ void ImageViewer::generateControlPanels() {
   run_canny_edge = new QPushButton("Run canny edge algorithm!");
   QObject::connect(run_canny_edge, SIGNAL(clicked()), this, SLOT(runCannyEdge()));
   
+  gauss_filter_size = new QDoubleSpinBox();
+  gauss_filter_size->setDecimals(0);
+  gauss_filter_size->setMinimum(3);
+  gauss_filter_size->setValue(3);
+  
+  t_low_spinbox = new QDoubleSpinBox();
+  t_low_spinbox->setDecimals(5);
+  t_low_spinbox->setValue(2.0);
+
+  t_high_spinbox = new QDoubleSpinBox();
+  t_high_spinbox->setDecimals(5);
+  t_high_spinbox->setValue(4.0);
+  
+  task_tab5_scrolllayout->addWidget(new QLabel("Gauss filter size (NxN)"));
+  task_tab5_scrolllayout->addWidget(gauss_filter_size);
+  task_tab5_scrolllayout->addWidget(new QLabel("Low threshold value"));
+  task_tab5_scrolllayout->addWidget(t_low_spinbox);
+  task_tab5_scrolllayout->addWidget(new QLabel("High threshold value"));
+  task_tab5_scrolllayout->addWidget(t_high_spinbox);
   task_tab5_scrolllayout->addWidget(run_canny_edge);
   
   tabWidget->addTab(task_tab5_widget, "Task #5");
diff --git a/imageviewer-qt4.h b/imageviewer-qt4.h
index 05aad74..a139fee 100644
--- a/imageviewer-qt4.h
+++ b/imageviewer-qt4.h
@@ -49,6 +49,7 @@
 #include <QPushButton>
 #include <QSlider>
 #include <QColor>
+#include <QDoubleSpinBox>
 
 #include <math.h>
 #include "fstream"
@@ -145,7 +146,10 @@ class ImageViewer : public QMainWindow {
     QWidget* task_tab5_scrollwidget;
     QScrollArea* task_tab5_scrollarea;
     QVBoxLayout* task_tab5_scrolllayout;
-    
+
+    QDoubleSpinBox* gauss_filter_size;
+    QDoubleSpinBox* t_low_spinbox;    
+    QDoubleSpinBox* t_high_spinbox;
     QPushButton* run_canny_edge;
     
     // "My" space for storing data/results