feat: add fit-in-view action

app/actionmanager.cpp

@@ -24,6 +24,7 @@ void ActionManager::setupAction(MainWindow *mainWindow)
     CREATE_NEW_ACTION(mainWindow, actionZoomIn);
     CREATE_NEW_ACTION(mainWindow, actionZoomOut);
     CREATE_NEW_ACTION(mainWindow, actionHorizontalFlip);
+    CREATE_NEW_ACTION(mainWindow, actionFitInView);
     CREATE_NEW_ACTION(mainWindow, actionFitByWidth);
     CREATE_NEW_ACTION(mainWindow, actionCopyPixmap);
     CREATE_NEW_ACTION(mainWindow, actionCopyFilePath);
@@ -48,6 +49,7 @@ void ActionManager::retranslateUi(MainWindow *mainWindow)
     actionZoomIn->setText(QCoreApplication::translate("MainWindow", "Zoom in", nullptr));
     actionZoomOut->setText(QCoreApplication::translate("MainWindow", "Zoom out", nullptr));
     actionHorizontalFlip->setText(QCoreApplication::translate("MainWindow", "Flip &Horizontally", nullptr));
+    actionFitInView->setText("Fit in view"); // TODO: what should it called?
     actionFitByWidth->setText("Fit by width"); // TODO: what should it called?
     actionCopyPixmap->setText(QCoreApplication::translate("MainWindow", "Copy P&ixmap", nullptr));
     actionCopyFilePath->setText(QCoreApplication::translate("MainWindow", "Copy &File Path", nullptr));

app/actionmanager.h

@@ -19,6 +19,7 @@ public:
     QAction *actionZoomIn;
     QAction *actionZoomOut;
     QAction *actionHorizontalFlip;
+    QAction *actionFitInView;
     QAction *actionFitByWidth;
     QAction *actionCopyPixmap;
     QAction *actionCopyFilePath;

app/graphicsview.cpp

@@ -208,6 +208,12 @@ void GraphicsView::checkAndDoFitInView(bool markItOnAnyway)
     }
 }
 
+// Automately do fit in view when viewport(window) smaller than image original size.
+void GraphicsView::setEnableAutoFitInView(bool enable)
+{
+    m_enableFitInView = enable;
+}
+
 inline double zeroOrOne(double number)
 {
     return qFuzzyIsNull(number) ? 0 : (number > 0 ? 1 : -1);

app/graphicsview.h

@@ -33,6 +33,7 @@ public:
     void fitByOrientation(Qt::Orientation ori = Qt::Horizontal, bool scaleDownOnly = false);
 
     void checkAndDoFitInView(bool markItOnAnyway = true);
+    void setEnableAutoFitInView(bool enable = true);
 
     static QTransform resetScale(const QTransform & orig);
 

app/mainwindow.cpp

@@ -421,6 +421,7 @@ void MainWindow::contextMenuEvent(QContextMenuEvent *event)
     menu->addSeparator();
 
     menu->addAction(m_am->actionHorizontalFlip);
+    menu->addAction(m_am->actionFitInView);
     menu->addAction(m_am->actionFitByWidth);
 
     menu->addSeparator();
@@ -562,6 +563,14 @@ void MainWindow::on_actionHorizontalFlip_triggered()
     m_graphicsView->flipView();
 }
 
+void MainWindow::on_actionFitInView_triggered()
+{
+    // TODO: maybe do it if window is smaller than original image size?
+    m_graphicsView->setEnableAutoFitInView(false);
+
+    m_graphicsView->fitInView(m_gv->sceneRect(), Qt::KeepAspectRatio);
+}
+
 void MainWindow::on_actionFitByWidth_triggered()
 {
     m_graphicsView->fitByOrientation();

app/mainwindow.h

@@ -66,6 +66,7 @@ private slots:
     void on_actionZoomIn_triggered();
     void on_actionZoomOut_triggered();
     void on_actionHorizontalFlip_triggered();
+    void on_actionFitInView_triggered();
     void on_actionFitByWidth_triggered();
     void on_actionCopyPixmap_triggered();
     void on_actionCopyFilePath_triggered();