gui: set individual plot as full screen when double clicked

The following commit features to set specific plot as full screen
if double clicked event is triggered while mouse is over that
particular plot.

This becomes handy if you are interested in a particular traces over
that plot and want to inspect it in more detail.

Software/PC_Application/CustomWidgets/tilewidget.cpp

@@ -13,13 +13,17 @@ TileWidget::TileWidget(TraceModel &model, QWidget *parent) :
     child1(0),
     child2(0),
     hasContent(false),
+    isFullScreen(false),
     content(0),
     model(model)
 {
     ui->setupUi(this);
     auto layout = new QGridLayout;
     layout->setContentsMargins(0,0,0,0);
+    auto fsLayout = new QGridLayout;
+    fsLayout->setContentsMargins(0,0,0,0);
     ui->ContentPage->setLayout(layout);
+    ui->ContentFullScreenMode->setLayout(fsLayout);
     ui->bClose->setVisible(false);
 }
 
@@ -188,6 +192,49 @@ void TileWidget::setContent(TracePlot *plot)
     ui->ContentPage->layout()->addWidget(plot);
     ui->stack->setCurrentWidget(ui->ContentPage);
     connect(content, &TracePlot::deleted, this, &TileWidget::traceDeleted);
+    connect(content, &TracePlot::doubleClicked, this, &TileWidget::on_plotDoubleClicked);
+}
+
+void TileWidget::on_plotDoubleClicked()
+{
+    setFullScreen();
+}
+
+void TileWidget::setFullScreen(void)
+{
+    auto clickedTile = this;
+
+    if(!clickedTile->parent) {
+        // Toplevel tile is already in full screen
+        return;
+    }
+
+    auto rootTile = findRootTile();
+
+    rootTile->fullScreenPlot = clickedTile->content;
+
+    if (isFullScreen == false)
+    {
+        ui->ContentPage->layout()->removeWidget(clickedTile->content);
+        rootTile->ui->ContentFullScreenMode->layout()->addWidget(rootTile->fullScreenPlot);
+        rootTile->ui->stack->setCurrentWidget(rootTile->ui->ContentFullScreenMode);
+        isFullScreen = true;
+    }
+    else {
+        rootTile->ui->stack->setCurrentWidget(rootTile->ui->ContentPage);
+        rootTile->ui->ContentFullScreenMode->layout()->removeWidget(rootTile->fullScreenPlot);
+        ui->ContentPage->layout()->addWidget(clickedTile->content);
+        isFullScreen = false;
+    }
+}
+
+TileWidget* TileWidget::findRootTile(void)
+{
+    auto node = this;
+    while (node->parent != nullptr) { // root tile should nullptr
+        node = node->parent;
+    }
+    return node;
 }
 
 void TileWidget::on_bSmithchart_clicked()
@@ -204,6 +251,13 @@ void TileWidget::on_bXYplot_clicked()
 
 void TileWidget::traceDeleted(TracePlot *)
 {
+
+    if (isFullScreen)
+    {
+        auto rootTile = findRootTile();
+        rootTile->ui->stack->setCurrentWidget(rootTile->ui->ContentPage);
+    }
+
     ui->stack->setCurrentWidget(ui->TilePage);
     hasContent = false;
     content = nullptr;

Software/PC_Application/CustomWidgets/tilewidget.h

@@ -36,6 +36,7 @@ public slots:
 private slots:
     void on_bSmithchart_clicked();
     void on_bXYplot_clicked();
+    void on_plotDoubleClicked();
     void traceDeleted(TracePlot *t);
 
 private:
@@ -43,12 +44,16 @@ private:
     void split();
     void setContent(TracePlot *plot);
     void setChild();
+    TileWidget* findRootTile();
+    void setFullScreen();
+    TracePlot *fullScreenPlot;
     Ui::TileWidget *ui;
     QSplitter *splitter;
     bool isSplit;
     TileWidget *parent;
     TileWidget *child1, *child2;
     bool hasContent;
+    bool isFullScreen;
     TracePlot *content;
     TraceModel &model;
 };

Software/PC_Application/CustomWidgets/tilewidget.ui

@@ -200,6 +200,7 @@
        </item>
       </layout>
      </widget>
+     <widget class="QWidget" name="ContentFullScreenMode"/>
      <widget class="QWidget" name="ContentPage"/>
     </widget>
    </item>