change: UI and migrate to gtest

app/widget/nodeview/nodeviewtoolbar.cpp

@@ -45,6 +45,22 @@ NodeViewToolBar::NodeViewToolBar(QWidget *parent)
 			&NodeViewToolBar::mini_map_enabled_toggled);
 	layout->addWidget(minimap_btn_);
 
+	// Zoom controls per the UI design reference: [+] [-] [Fit]
+	zoom_out_btn_ = new QPushButton();
+	connect(zoom_out_btn_, &QPushButton::clicked, this,
+			&NodeViewToolBar::zoom_out_clicked);
+	layout->addWidget(zoom_out_btn_);
+
+	zoom_in_btn_ = new QPushButton();
+	connect(zoom_in_btn_, &QPushButton::clicked, this,
+			&NodeViewToolBar::zoom_in_clicked);
+	layout->addWidget(zoom_in_btn_);
+
+	fit_btn_ = new QPushButton();
+	connect(fit_btn_, &QPushButton::clicked, this,
+			&NodeViewToolBar::fit_clicked);
+	layout->addWidget(fit_btn_);
+
 	layout->addStretch();
 
 	retranslate();
@@ -65,12 +81,18 @@ void NodeViewToolBar::retranslate()
 {
 	add_node_btn_->setToolTip(tr("Add Node"));
 	minimap_btn_->setToolTip(tr("Toggle Mini-Map"));
+	zoom_in_btn_->setToolTip(tr("Zoom In"));
+	zoom_out_btn_->setToolTip(tr("Zoom Out"));
+	fit_btn_->setToolTip(tr("Fit to Content"));
+	fit_btn_->setText(tr("Fit"));
 }
 
 void NodeViewToolBar::update_icons()
 {
 	add_node_btn_->setIcon(icon::add);
 	minimap_btn_->setIcon(icon::mini_map);
+	zoom_in_btn_->setIcon(icon::zoom_in);
+	zoom_out_btn_->setIcon(icon::zoom_out);
 }
 
 }

app/widget/nodeview/nodeviewtoolbar.h

@@ -41,6 +41,12 @@ signals:
 
 	void mini_map_enabled_toggled(bool e);
 
+	void zoom_in_clicked();
+
+	void zoom_out_clicked();
+
+	void fit_clicked();
+
 protected:
 	virtual void changeEvent(QEvent *e) override;
 
@@ -52,6 +58,12 @@ private:
 	QPushButton *add_node_btn_;
 
 	QPushButton *minimap_btn_;
+
+	QPushButton *zoom_in_btn_;
+
+	QPushButton *zoom_out_btn_;
+
+	QPushButton *fit_btn_;
 };
 
 }

app/widget/nodeview/nodewidget.cpp

@@ -44,6 +44,12 @@ NodeWidget::NodeWidget(QWidget *parent)
 			&NodeView::set_mini_map_enabled);
 	connect(toolbar_, &NodeViewToolBar::add_node_clicked, node_view_,
 			&NodeView::show_add_menu);
+	connect(toolbar_, &NodeViewToolBar::zoom_in_clicked, node_view_,
+			&NodeView::zoom_in);
+	connect(toolbar_, &NodeViewToolBar::zoom_out_clicked, node_view_,
+			&NodeView::zoom_out);
+	connect(toolbar_, &NodeViewToolBar::fit_clicked, node_view_,
+			&NodeView::center_on_items_bounding_rect);
 
 	// Set defaults
 	toolbar_->set_mini_map_enabled(true);