Fix some bugs under qt5.8

src/butterworth.cpp

@@ -38,7 +38,7 @@ QImage* Butterworth::run(Complex* dft, int value, SimpleFilteredImage* img)
     int height = img->spectrum()->height();
     int i, j, pos, size = width * height;
     double h;
-    int n = QInputDialog::getInteger(img, "Butterworth filter", "n=");
+    int n = QInputDialog::getInt(img, "Butterworth filter", "n=");
 
     dft = Fourier::cp(dft, size);
 

src/histogram.cpp

@@ -67,7 +67,7 @@ void Histogram::paintGraphBase(QPainter *painter, int max)
 
 void Histogram::paintBar(QPainter *painter, int max, int i)
 {
-    int size = qRound(indexes[i] * (ZERO_POINT - TOP_SPACE) / max) + 1;
+    int size = qRound(double(indexes[i] * (ZERO_POINT - TOP_SPACE) / max)) + 1;
 
     QLinearGradient color;
     int starting_color = i * perClass;

src/idealfilteredimage.h

@@ -37,7 +37,7 @@ class IdealFilteredImage : public QLabel
     QRubberBand *rubberBand;
     QPoint selOrigin, selDest;
 public:
-    IdealFilteredImage(QWidget*);
+    IdealFilteredImage(QWidget* parent=nullptr);
     void setSpectrum(QImage*);
     QImage* spectrum();
     int y0();

src/pidmain.cpp

@@ -18,6 +18,7 @@
 #include <QtGui>
 #include <QMdiArea>
 #include <QMdiSubWindow>
+#include <QFileDialog>
 #include "pidmain.h"
 #include "about.h"
 #include "help.h"

src/simplefilteredimage.h

@@ -12,8 +12,8 @@ class SimpleFilteredImage : public QLabel
     QImage *spec;
     int _x0, _y0, _z;
 public:
-    SimpleFilteredImage(QDialog*);
-    SimpleFilteredImage(QWidget*);
+    SimpleFilteredImage(QDialog* dlg);
+    SimpleFilteredImage(QWidget* parent=nullptr);
     void setSpectrum(QImage*);
     QImage* spectrum();
     int y0();

src/src.pro

@@ -17,6 +17,7 @@
 
 TEMPLATE = app
 TARGET = blindcamaleon
+QT += core gui widgets
 
 include(src.pri)