fullscreen picture viewer adapt when screen size changed

OptionsDialog.cpp

@@ -41,7 +41,7 @@ OptionsDialog::OptionsDialog(ProfileDatabase *profileDB, QWidget *parent) :
     ui->tabWidget->setCurrentIndex(0);
     ui->labPicCustomRes->setVisible(false);
 
-    QRect desktopResolution = QApplication::desktop()->screenGeometry();
+    QRect desktopResolution = QApplication::desktop()->screenGeometry(parent);
     int desktopSizeWidth = desktopResolution.width();
     int desktopSizeHeight = desktopResolution.height();
     aspectRatio = Qt::KeepAspectRatio;

PictureDialog.cpp

@@ -400,8 +400,8 @@ void PictureDialog::on_labPicture_mouseDoubleClicked(Qt::MouseButton button)
         QObject::connect(pictureWidget, SIGNAL(nextPictureRequested()), this, SLOT(dialogNextPictureRequested()));
         QObject::connect(pictureWidget, SIGNAL(previousPictureRequested()), this, SLOT(dialogPreviousPictureRequested()));
 
-        pictureWidget->setMinimumSize(desktopRect.width(), desktopRect.height());
-        pictureWidget->setMaximumSize(desktopRect.width(), desktopRect.height());
+        pictureWidget->move(desktopRect.x(), desktopRect.y());
+        pictureWidget->resize(desktopRect.width(), desktopRect.height());
         pictureWidget->showFullScreen();
         pictureWidget->setFocus();
         pictureWidget->raise();

PictureWidget.cpp

@@ -19,6 +19,8 @@
 #include "PictureDialog.h"
 #include "PictureWidget.h"
 #include "UiModLabel.h"
+#include <QDesktopWidget>
+#include <QApplication>
 #include <QHBoxLayout>
 #include <QKeyEvent>
 #include <QPixmap>
@@ -42,6 +44,7 @@ PictureWidget::PictureWidget(QWidget *parent) : QDialog(parent)
 
     QObject::connect(pictureLabel, SIGNAL(mouseDoubleClicked(Qt::MouseButton)), this, SLOT(pictureDoubleClicked(Qt::MouseButton)));
     QObject::connect(pictureLabel, SIGNAL(customContextMenuRequested(QPoint)), parent, SLOT(exportCustomContextMenuRequested(QPoint)));
+    QObject::connect(QApplication::desktop(), SIGNAL(resized(int)), this, SLOT(updateWindowSize(int)));
 
     setLayout(widgetLayout);
 }
@@ -81,12 +84,27 @@ void PictureWidget::pictureDoubleClicked(Qt::MouseButton button)
     }
 }
 
-void PictureWidget::setImage(QImage image, QRect rec)
+void PictureWidget::setImage(QImage image_, QRect rec)
 {
+    image = image_;
     pictureLabel->setPixmap(QPixmap::fromImage(image.scaled(rec.width(), rec.height(), Qt::KeepAspectRatio, Qt::SmoothTransformation)));
 }
 
-void PictureWidget::setImage(QImage image)
+void PictureWidget::setImage(QImage image_)
 {
+    image = image_;
     pictureLabel->setPixmap(QPixmap::fromImage(image.scaled(geometry().width(), geometry().height(), Qt::KeepAspectRatio, Qt::SmoothTransformation)));
 }
+
+void PictureWidget::updateWindowSize(int screenID)
+{
+    if (screenID = QApplication::desktop()->screenNumber(this))
+    {
+        QRect desktopRect = QApplication::desktop()->screenGeometry(this);
+        this->move(desktopRect.x(), desktopRect.y());
+        this->resize(desktopRect.width(), desktopRect.height());
+        this->showFullScreen();
+        pictureLabel->setPixmap(QPixmap::fromImage(image.scaled(desktopRect.width(), desktopRect.height(), Qt::KeepAspectRatio, Qt::SmoothTransformation)));
+
+    }
+}

PictureWidget.h

@@ -42,9 +42,11 @@ protected:
 private:
     QHBoxLayout *widgetLayout;
     UiModLabel *pictureLabel;
+    QImage image;
 
 private slots:
     void pictureDoubleClicked(Qt::MouseButton button);
+    void updateWindowSize(int screenID);
 
 signals:
     void nextPictureRequested();