NodeHandler Class Reference

QGraphicsScene that handles all drag&drop, node move and connect events. More...

#include <NodeHandler.h>

Inheritance diagram for NodeHandler:

Public Slots
void	loadFromModel ()
	loads the scene from the set GraphModel
void	saveFlowchart ()
	save flowchart to file More...
void	selectNode (QString name)
	select some node
void	updateTooltip (QString comment)
	update tooltip of selected node

Signals
void	nodeTypeSelected (QString type) const
	Send type of currently selected node. More...
void	statusMessage (QString msg) const
	message to display on status bar

Public Member Functions
	NodeHandler (GraphModel *model, QObject *parent=0)
	default constructor More...
virtual	~NodeHandler ()
	default destructor
void	connectNodes (QString node0, QString prop0, QString node1, QString prop1)
	connects two node with its slots: node0.prop0 to node1.prop1 More...
bool	load (QString fname)
	load the GraphModel from the given filename and calls loadFromModel to fill the scene More...
GraphModel *	model ()
	get the current GraphModel

Protected Member Functions
virtual void	contextMenuEvent (QGraphicsSceneContextMenuEvent *event)
	context menu More...
virtual void	keyPressEvent (QKeyEvent *keyEvent)
	handles key press events More...
virtual void	mouseMoveEvent (QGraphicsSceneMouseEvent *event)
	handles mouse movement
virtual void	mousePressEvent (QGraphicsSceneMouseEvent *event)
	handles mouse press events
virtual void	mouseReleaseEvent (QGraphicsSceneMouseEvent *event)
	handles all mousebutton release events
drag/drop handling
Accepts drag events with mime data as they are set by standard item models. This way it is possible to use arbitrary standard item views as drag sources. Checks if the contained data represent a class name.
virtual void	dragEnterEvent (QGraphicsSceneDragDropEvent *event)
virtual void	dragMoveEvent (QGraphicsSceneDragDropEvent *event)
virtual void	dropEvent (QGraphicsSceneDragDropEvent *event)

Private Member Functions
void	_deselectAllNodes ()
	deselects all nodes
void	setNodeActive ()
	sets the nodes active or inactive

Private Attributes
bool	_addLine
	state of slot connection mode
ConnectionLine *	_cline
	buffered connection line for slot connection drawing
GraphModel *	_model
	current set GraphModel
QMap< QString, Node * >	_nodeMap
	map for node lookup
Node *	_selectedNode
	pointer to currently selected node (zero if none selected)
NodeProperty *	_startProp
	buffer that stores the slot connection start property

Detailed Description

Definition at line 36 of file NodeHandler.h.

Constructor & Destructor Documentation

NodeHandler::NodeHandler	(	GraphModel *	model,
		QObject *	parent = 0
	)

Parameters

parent	parent QObject
model	model to be used within this node handler

Definition at line 43 of file NodeHandler.cpp.

References _model, loadFromModel(), and selectNode().

Member Function Documentation

void NodeHandler::connectNodes	(	QString	node0,
		QString	prop0,
		QString	node1,
		QString	prop1
	)

Parameters

node0	name of the first node
node1	name of the second node
prop0	name of the first nodes property
prop1	name of the second nodes property

Definition at line 255 of file NodeHandler.cpp.

References _nodeMap, NodeProperty::addConnection(), Node::getProperty(), NodeProperty::moveBy(), and ConnectionLine::setStartEndProp().

void NodeHandler::contextMenuEvent ( QGraphicsSceneContextMenuEvent *  event )

protectedvirtual

This provides a context menu for slots. Currently it contains an option to disconnect this slot.

Parameters

event

context menu event

Definition at line 392 of file NodeHandler.cpp.

References _model, GraphModel::deleteNode(), GraphModel::disconnectAllSlots(), GraphModel::disconnectSlot(), NodeProperty::getFullName(), ParameterFileModel::getInputs(), Node::getInstanceName(), ParameterFileModel::getOutputs(), and GraphModel::renameNode().

void NodeHandler::keyPressEvent ( QKeyEvent *  keyEvent )

protectedvirtual

provided key actions:

• node navigation via the left/right arrow keys
• renaming via F2 key
• delete node via DEL key
• deselect node via ESC key

  Parameters

  keyEvent

  key event

Definition at line 317 of file NodeHandler.cpp.

References _model, GraphModel::deleteNode(), ParameterFileModel::prefix(), ParameterFileModel::prefixValid(), GraphModel::renameNode(), GraphModel::selectNext(), and ParameterFileModel::setPrefix().

bool NodeHandler::load

(

QString

fname

)

Parameters

fname

workflow parameter file name

Return values

true	file has successfully been loaded

Definition at line 168 of file NodeHandler.cpp.

References _model, and ParameterFileModel::load().

void NodeHandler::nodeTypeSelected ( QString  type ) const

signal

Parameters

type

type

void NodeHandler::saveFlowchart ( )

slot

shows file open dialog

Definition at line 285 of file NodeHandler.cpp.

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The documentation for this class was generated from the following files:

• src/NodeHandler.h
• src/NodeHandler.cpp