From 81a4432a108bf2166db108a3de63ce936ff797d0 Mon Sep 17 00:00:00 2001
From: Amirreza Baghbanpourasl <amirreza.baghbanpourasl@skf.com>
Date: Fri, 18 Nov 2022 17:02:28 +0100
Subject: [PATCH 1/3] script to build for vc17

---
 scripts_to_build/win_make_vc17_x64.bat | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 scripts_to_build/win_make_vc17_x64.bat

diff --git a/scripts_to_build/win_make_vc17_x64.bat b/scripts_to_build/win_make_vc17_x64.bat
new file mode 100644
index 0000000..527f663
--- /dev/null
+++ b/scripts_to_build/win_make_vc17_x64.bat
@@ -0,0 +1,10 @@
+mkdir build
+cd build
+mkdir x64
+cd x64
+
+cmake -DQT5_DIR=C:/Qt/5.15.2/msvc2019_64/lib/cmake -DCMAKE_PREFIX_PATH=../opencv/build/install -G "Visual Studio 17 2022"  ../../..
+
+cmake --build . --config Release
+
+PAUSE
\ No newline at end of file

From 501ac7f5435d878a5e75fba2af5693a38cbe503c Mon Sep 17 00:00:00 2001
From: Amirreza Baghbanpourasl <amirreza.baghbanpourasl@skf.com>
Date: Fri, 18 Nov 2022 17:08:23 +0100
Subject: [PATCH 2/3] values for spin bars adjusted: scale and pen size

---
 src/main_window.ui | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/main_window.ui b/src/main_window.ui
index 662e7f0..bb38089 100644
--- a/src/main_window.ui
+++ b/src/main_window.ui
@@ -186,13 +186,13 @@
          <item>
           <widget class="QDoubleSpinBox" name="spinbox_scale">
            <property name="minimum">
-            <double>0.050000000000000</double>
+            <double>0.500000000000000</double>
            </property>
            <property name="maximum">
             <double>8.000000000000000</double>
            </property>
            <property name="singleStep">
-            <double>0.050000000000000</double>
+            <double>0.500000000000000</double>
            </property>
            <property name="value">
             <double>1.000000000000000</double>
@@ -216,7 +216,7 @@
             <number>0</number>
            </property>
            <property name="singleStep">
-            <number>5</number>
+            <number>1</number>
            </property>
            <property name="value">
             <number>30</number>

From 02a25cb26206f8b9119fa1fa383c59a88b4aa61f Mon Sep 17 00:00:00 2001
From: Amirreza Baghbanpourasl <amirreza.baghbanpourasl@skf.com>
Date: Fri, 18 Nov 2022 17:10:24 +0100
Subject: [PATCH 3/3] zoom in and out centers around the mouse pointer

---
 src/image_canvas.cpp | 43 +++++++++++++++++++++++++++++++++++++++++++
 src/image_canvas.h   |  4 ++++
 2 files changed, 47 insertions(+)

diff --git a/src/image_canvas.cpp b/src/image_canvas.cpp
index 43f94bd..6bfec3f 100644
--- a/src/image_canvas.cpp
+++ b/src/image_canvas.cpp
@@ -99,9 +99,47 @@ void ImageCanvas::saveMask() {
 void ImageCanvas::scaleChanged(double scale) {
 	_scale  = scale ;
 	resize(_scale * _image.size());
+	
+	adjustScrollBars();
 	repaint();
 }
 
+void ImageCanvas::adjustScrollBars()
+{	// from : https://github.com/BestVanRome
+	//   x ------>
+	//     _________
+	// y  |.........|
+	// |  |.........|
+	// |  |.........|
+	// |  |.........|
+	// v  |.........|
+	//     ---------
+	QPointF mPos = _mouse_pos;
+	QSize imSize = _act_im_size;
+
+
+	if (_scroll_parent->verticalScrollBar())
+	{
+		auto posHeightRel = (mPos.y() / imSize.height());  //Relation Mauspos to Height of Image
+
+		//set vertical scrollbar to mouse position
+		QScrollBar* verticalScroll = _scroll_parent->verticalScrollBar();
+		double vertScrollSpace = verticalScroll->maximum() - verticalScroll->minimum(); // general calculating of moving-space
+		verticalScroll->setValue(vertScrollSpace * posHeightRel);
+		//alternative: QWheelEvent::angleDelta().y() -> see example!!! : https://doc.qt.io/qt-5/qwheelevent.html#angleDelta
+	}
+
+	if (_scroll_parent->horizontalScrollBar())
+	{
+		auto posWidthRel = (mPos.x() / imSize.width()); ////Relation Mauspos to Width of Image
+
+		//set horizontal scrollbar to mouse position
+		QScrollBar* horizontalScroll = _scroll_parent->horizontalScrollBar();
+		double horizScrollSpace = horizontalScroll->maximum() - horizontalScroll->minimum(); // general calculating of moving-space
+		horizontalScroll->setValue(horizScrollSpace * posWidthRel);
+	}
+}
+
 void ImageCanvas::alphaChanged(double alpha) {
 	_alpha = alpha;
 	repaint();
@@ -144,8 +182,13 @@ void ImageCanvas::mouseMoveEvent(QMouseEvent * e) {
 
 	if (_button_is_pressed) 
 		_drawFillCircle(e);
+	_act_im_size = _image.size() * _scale; //important for adjusting the scrollBars
 
+	//using statusbar to show actual _mouse_pos
+	_ui->statusbar->showMessage("X: " + QString::number(_mouse_pos.x()) + " " +
+		"Y: " + QString::number(_mouse_pos.y()));
 	update();
+
 }
 
 void ImageCanvas::setSizePen(int pen_size) {
diff --git a/src/image_canvas.h b/src/image_canvas.h
index 6b5e1d7..6cfeb39 100644
--- a/src/image_canvas.h
+++ b/src/image_canvas.h
@@ -71,6 +71,10 @@ public slots :
 	ColorMask        _color            ;
 	int              _pen_size         ;
 	bool             _button_is_pressed;
+	QSize _act_im_size;
+
+private slots:
+	void adjustScrollBars();
 
 };