ui: Hide nodes and edges from graph via context menu action or Alt + Click (issue #472)

* show all context menu actions, but disable unavailable
* added hide action to undo redo stack

src/lib_gui/qt/view/graphElements/QtGraphEdge.cpp

@@ -16,6 +16,7 @@
 #include "utility/messaging/type/MessageFocusIn.h"
 #include "utility/messaging/type/MessageFocusOut.h"
 #include "utility/messaging/type/MessageGraphNodeBundleSplit.h"
+#include "utility/messaging/type/MessageGraphNodeHide.h"
 #include "utility/messaging/type/MessageTooltipShow.h"
 #include "utility/messaging/type/MessageTooltipHide.h"
 #include "utility/utility.h"
@@ -80,6 +81,16 @@ QtGraphNode* QtGraphEdge::getTarget()
 	return m_target;
 }
 
+Id QtGraphEdge::getTokenId() const
+{
+	if (getData())
+	{
+		return getData()->getId();
+	}
+
+	return 0;
+}
+
 void QtGraphEdge::updateLine()
 {
 	QtGraphNode* owner = m_owner;
@@ -269,6 +280,16 @@ void QtGraphEdge::onClick()
 	}
 }
 
+void QtGraphEdge::onHide()
+{
+	Id tokenId = getTokenId();
+
+	if (tokenId)
+	{
+		MessageGraphNodeHide(tokenId).dispatch();
+	}
+}
+
 void QtGraphEdge::focusIn()
 {
 	if (!m_isFocused)
@@ -328,7 +349,14 @@ void QtGraphEdge::mouseReleaseEvent(QGraphicsSceneMouseEvent* event)
 {
 	if (!m_mouseMoved)
 	{
-		this->onClick();
+		if (event->modifiers() & Qt::AltModifier)
+		{
+			this->onHide();
+		}
+		else
+		{
+			this->onClick();
+		}
 	}
 }
 

src/lib_gui/qt/view/graphElements/QtGraphEdge.h

@@ -35,6 +35,8 @@ public:
 	QtGraphNode* getOwner();
 	QtGraphNode* getTarget();
 
+	Id getTokenId() const;
+
 	void updateLine();
 
 	bool getIsActive() const;
@@ -44,6 +46,7 @@ public:
 	void setIsFocused(bool isFocused);
 
 	void onClick();
+	void onHide();
 
 	void focusIn();
 	void focusOut();

src/lib_gui/qt/view/graphElements/QtGraphNode.cpp

@@ -11,6 +11,7 @@
 #include "qt/utility/utilityQt.h"
 #include "qt/view/graphElements/nodeComponents/QtGraphNodeComponent.h"
 #include "qt/view/graphElements/QtGraphEdge.h"
+#include "utility/messaging/type/MessageGraphNodeHide.h"
 #include "utility/ResourcePaths.h"
 #include "utility/utilityString.h"
 
@@ -345,6 +346,20 @@ void QtGraphNode::onClick()
 {
 }
 
+void QtGraphNode::onHide()
+{
+	Id tokenId = getTokenId();
+
+	if (tokenId)
+	{
+		MessageGraphNodeHide(tokenId).dispatch();
+	}
+	else if (getParent())
+	{
+		getParent()->onHide();
+	}
+}
+
 void QtGraphNode::mousePressEvent(QGraphicsSceneMouseEvent* event)
 {
 	event->ignore();

src/lib_gui/qt/view/graphElements/QtGraphNode.h

@@ -92,6 +92,7 @@ public:
 	virtual void addSubNode(QtGraphNode* node);
 
 	virtual void onClick();
+	virtual void onHide();
 	virtual void moved(const Vec2i& oldPosition);
 
 	virtual void updateStyle() = 0;

src/lib_gui/qt/view/graphElements/nodeComponents/QtGraphNodeComponentClickable.cpp

@@ -35,7 +35,14 @@ void QtGraphNodeComponentClickable::nodeMouseReleaseEvent(QGraphicsSceneMouseEve
 {
 	if (!m_mouseMoved)
 	{
-		m_graphNode->onClick();
+		if (event->modifiers() & Qt::AltModifier)
+		{
+			m_graphNode->onHide();
+		}
+		else
+		{
+			m_graphNode->onClick();
+		}
 		event->accept();
 	}
 }