IlvGanttChart Class Reference

Rogue Wave Views Gantt chart user interface class. More...

#include <ilviews/gantt/gantt.h>

Inheritance diagram for IlvGanttChart:

List of all members.

Public Member Functions
	IlvGanttChart (IlvDisplay *display, const IlvRect &rect, IlInt start, IlInt end, IlInt shownStart, IlInt shownEnd, IlUShort step, IlvDim rowsize, IlvDim lineInfoSize=0, IlvDim unitsize=20, IlvDim scaleH=32, IlvDim sbsize=16, IlUShort spacing=4, IlUShort vwspacing=20, IlUShort offset=0, IlvDim handsize=8, IlvPosition hasScale=IlvTop, IlvPosition hasHSB=IlvBottom, IlvPosition hasVSB=IlvRight, int numLayers=5, IlBoolean useacc=IlTrue, IlvPalette *palette=0)
	Constructor.
virtual	~IlvGanttChart ()
	Destructor.
void	addLine (IlvGanttLine *line, IlBoolean redraw=IlTrue, int layer=1)
	Appends a line to the Gantt chart.
virtual void	addLink (IlvGanttLink *link, IlBoolean redraw=IlTrue, int layer=2)
	Adds a link to the Gantt chart.
virtual void	addNode (IlvGanttNode *node, IlBoolean redraw=IlTrue, int layer=3)
	Adds a node to the Gantt chart.
virtual IlBoolean	addSubNode (IlvGanttNode *node, IlvGanttSubNode *subnode, IlBoolean redraw=IlTrue, int layer=3)
	Adds a subnode to the Gantt chart node.
void	addSubNodeToHiliteList (IlvGanttSubNode *subnode)
	Adds a subnode to the highlight list.
void	allowDragDrop (IlBoolean flag)
	Specifies whether drag-and-drop operations are allowed.
virtual IlvPos	compactRow (IlUShort row, IlBoolean redraw=IlTrue)
	Compresses the height of a given row.
void	computeGridPoints (IlUShort index)
	Computes the grid points.
virtual IlvGanttGridViewHook *	createGridHook (IlvGrapher *grapher, IlvView *view)
	Creates the grid hook connected to the view of the grapher.
virtual IlvScale *	createScale (IlvDisplay *display, const IlvPoint &origin, IlvDim size, IlInt start, IlInt end, IlUShort step, IlvPosition p=IlvTop) const
	Creates a scale object.
virtual IlvGanttScrollViewHook *	createScrollHook (IlvGrapher *grapher, IlvView *view)
	Creates the scroll hook connected to the view.
virtual void	deleteAll (IlBoolean destroy, IlBoolean redraw=IlTrue)
	Removes all the objects stored in the chart.
virtual void	deleteNodes (IlBoolean destroy, IlBoolean redraw=IlTrue)
	Deletes the Gantt nodes and links stored in the Gantt chart.
virtual void	drawGrid (IlvPort *dst, IlUShort index, IlBoolean skipCompute=IlFalse, const IlvRegion *clip=0, IlvTransformer *trans=0, IlvDirection direction=(IlvDirection)(IlvHorizontal|IlvVertical))
	Draws the grid in the given port.
void	emptyHiliteList ()
	Resets the highlight list to empty.
virtual void	ensureVisible (IlvManager *manager, IlvView *view, const IlvPoint &point, IlBoolean redraw=IlTrue)
	Translates the working view according to the mouse position.
IlUShort	firstVisibleRow (IlUShort index) const
	Gets the first visible row of the manager view.
virtual void	fitViewsTransformerToContents (IlUShort index, IlvDirection dir, IlBoolean redraw=IlTrue)
	Computes the transformer so it shows every object stored in all the visible layers.
IlvGraphic *	getBreakGraphicModel () const
	Gets the break graphic model currently used.
IlInt	getEnd () const
	Gets the end time managed by the chart.
IlvGrapher *	getGrapher () const
	Gets the grapher stored in the chart.
IlvView *	getGrapherView (IlUShort index) const
	Returns the grapher view indicated by index.
IlvGanttGridViewHook *	getGridHook (IlUShort index) const
	Returns the grid hook connected to the view indicated by index.
IlvPalette *	getGridPalette () const
	Returns the palette used to draw the grid.
IlvFilledRectangle *	getHandle () const
	Gets the handle box that controls the size of the views.
IlvPalette *	getHiliteBackGroundPalette () const
	Gets the highlight background palette.
IlBoolean	getHiliteState () const
	Gets the highlight state.
IlvScrollBar *	getHorizontalScrollBar (IlUShort index) const
	Gets the horizontal scroll bar.
IlvGanttLine *	getLine (IlUShort row) const
	Gets a Gantt line.
virtual IlvRect &	getLineArea (IlvRect &area) const
	Returns the bounds of the Gantt lines.
IlvGraphic *	getLineGraphicModel () const
	Gets the line graphic model of the Gantt chart.
IlvGraphic *	getLineGrid () const
	Gets the line grid currently being used.
IlInt	getLineLoad (IlUShort row, IlInt time) const
	Gets the difference between the capacity of a line and the sum of the capacities of all subnodes intersecting with a vertical axis.
IlUShort	getLineRow (const IlvGanttLine *line) const
	Gets the row where the given Gantt line is located.
IlvGanttLine **	getLines (IlUShort &count) const
	Gets lines managed by the Gantt chart.
IlvGanttSubNode **	getLineSubNodes (IlUInt &count, IlUShort row) const
	Gets the subnodes associated with the Gantt line.
IlvGraphic *	getLinkGraphicModel () const
	Gets the graphic model of the links.
IlvManager *	getManager () const
	Gets the manager stored in the chart.
IlvView *	getManagerView (IlUShort index) const
	Returns the manager view indicated by index.
IlvGanttNodeDrawMode	getNodeDrawMode () const
	Gets the node presentation mode.
IlvGanttNode **	getNodes (IlUInt &count) const
	Gets the nodes managed by the chart.
IlvGanttAbstractObject *	getObject (const char *name) const
	Gets the Gantt object with the given name.
IlvGanttAbstractObject *	getObject (const IlvGraphic *graphic) const
	Gets the Gantt object.
const char *	getObjectName (const IlvGanttAbstractObject *obj) const
	Gets the name of the Gantt object.
IlvGraphic *	getRowGrid () const
	Gets the row grid currently being used.
IlvScale *	getScale (IlUShort index) const
	Gets a scale object.
IlvGanttScrollViewHook *	getScrollHook (IlUShort index) const
	Gets the scroll hook connected to the view.
IlInt	getShownEnd (IlUShort index) const
	Gets the current shown end time for the grapher views.
IlInt	getShownStart (IlUShort index) const
	Gets the current shown start time for the grapher views.
IlInt	getStart () const
	Gets the start time managed by the chart.
IlUShort	getStep (IlUShort index) const
	Gets the graduation step in the grapher views of the Gantt chart.
IlvGanttSubNode *	getSubNode (const IlvGraphic *graphic) const
	Returns the Gantt subnode associated with the graphic object graphic in the Gantt chart.
void	getSubNodeDrawnStartEnd (const IlvGanttNode *node, IlUShort index, IlInt &start, IlInt &end) const
	Gets the positions of the given subnode.
IlvGraphic *	getSubNodeGraphicModel () const
	Gets the graphic model of the subnodes.
IlvGanttSubNodeHook *	getSubNodeHook ()
	Gets the subnode hook installed in a Gantt chart.
IlInt	getSubNodeMinimumSize () const
	Gets the minimum size of subnodes.
IlvScrollBar *	getVerticalScrollBar (IlUShort index) const
	Gets the vertical scroll bar.
IlvRect &	getWorkArea (IlvRect &area) const
	Returns the work area.
void	grapherViewsBBox (IlvRect &bbox) const
	Gets the bounding box of the four grapher views.
virtual void	handleReshape (const IlvPoint &handlePosition)
	Handles the resizing of views.
virtual void	handleResize (const IlvRect &newsize)
	Handles the resizing of Gantt chart components.
virtual void	insertLine (IlvGanttLine *line, IlUShort row, IlBoolean redraw=IlTrue, int layer=1)
	Inserts a line before a row.
virtual void	installAccelerators ()
	Adds default accelerators to the manager and the grapher event handlers.
IlBoolean	isDoubleBuffering () const
	Returns whether double buffering is enabled.
IlBoolean	isManaged (const IlvGanttAbstractObject *object) const
	Indicates whether the given object is managed by the Gantt chart.
IlBoolean	isShowingFreeNodes () const
	Indicates whether the chart shows free nodes.
IlBoolean	isShowingGrapherViewBorders () const
	Indicates whether the borders of the grapher views are drawn.
IlBoolean	isShowingGrid () const
	Indicates whether a grid is drawn in the grapher views.
IlUShort	lastVisibleRow (IlUShort index) const
	Gets the last visible row of the manager view.
virtual void	lineBBox (IlUShort row, IlvRect &bbox) const
	Gets the bounding box of a graphic object associated with a Gantt line.
virtual void	loadObjects (IlvInputFile &file)
	Loads a set of objects from the input file.
virtual void	makeView (IlvPort *dst, const IlvTransformer *t=0)
	Creates the views.
void	moveHandle (const IlvPoint &position)
	Moves the handle box to a new position.
virtual IlBoolean	moveLine (IlvGanttLine *line, IlUShort row, IlBoolean redraw=IlTrue)
	Moves the line to the given row.
virtual IlBoolean	prettyRowBBox (IlUShort &row, IlvRect &prettyBox, IlBoolean redraw=IlTrue)
	Compresses the height of a given row.
virtual void	prettySubNodeBBox (IlvGanttNode *node, IlUShort index, IlvRect &bbox, IlBoolean redraw=IlTrue)
	Gets the prettied bounding box of a subnode.
virtual void	psDump (const char *filename, IlUInt xmargin=20, IlUInt ymargin=20, IlBoolean rotate=IlTrue) const
	Creates a dump file for PostScript printing.
void	readObjectFile (IlBoolean redraw=IlTrue)
	Reads a set of IlvGraphic, IlvGanttLine, IlvGanttNode, and IlvGanttLink objects from the file associated with the Gantt chart.
virtual void	removeHooks ()
	Removes the hooks from the grapher.
virtual IlBoolean	removeLine (IlUShort row, IlBoolean redraw=IlTrue, IlBoolean destroy=IlTrue)
	Removes a line located at a row from the Gantt chart object set.
virtual IlBoolean	removeLink (IlvGanttLink *link, IlBoolean redraw=IlTrue, IlBoolean destroy=IlTrue)
	Removes a link from the Gantt chart object set.
virtual IlBoolean	removeNode (IlvGanttNode *node, IlBoolean redraw=IlTrue, IlBoolean destroy=IlTrue)
	Removes a node from the Gantt chart object set.
virtual IlBoolean	removeSubNodes (IlvGanttNode *node, IlUShort *indexArray, IlUShort num, IlBoolean redraw=IlTrue, IlBoolean destroy=IlTrue)
	Removes subnodes from the Gantt chart node.
virtual void	resetViewsTransformer (IlUShort index, IlBoolean redraw=IlTrue)
	Resets the transformer so that the initial transformer can be applied.
void	rowBBox (IlUShort row, IlvRect &bbox) const
	Gets the bounding box of a region that contains the graphic object associated with a Gantt line.
virtual void	rowResized (IlUShort row, IlvPos dh) const
	Used to indicate that a Gantt row has been resized.
IlUShort	rows () const
	Gets the number of rows in the Gantt chart.
virtual void	saveObjects (IlvOutputFile &file) const
	Writes the descriptions of the objects stored in the manager to the output file.
void	setBreakGraphicModel (IlvGraphic *model, IlBoolean destroyOld=IlTrue)
	Sets the break graphic model.
virtual void	setDoubleBuffering (IlBoolean doubleBuffer)
	Enables or disables double buffering.
void	setGridPalette (IlvPalette *palette)
	Sets the palette used to draw the grid.
void	setHiliteBackGroundPalette (IlvPalette *bgPal)
	Sets the highlight background palette.
void	setHiliteState (IlBoolean hilite=IlTrue)
	Sets the highlight state.
IlvGraphic *	setLineGraphicModel (IlvGraphic *model, IlBoolean deleteOld=IlTrue)
	Sets the line graphic model for the Gantt chart.
IlvGraphic *	setLineGrid (IlvGraphic *compoGrid, IlBoolean redraw=IlTrue, IlInt layer=0)
	Sets the grid for the Gantt lines.
void	setLinkGraphicModel (IlvGraphic *model, IlBoolean deleteOld=IlTrue)
	Sets the graphic model for links.
void	setNodeDrawMode (IlvGanttNodeDrawMode mode, IlBoolean redraw=IlTrue)
	Sets the node presentation mode.
virtual void	setNodeDrawMode (IlvGanttNode *node, IlvGanttNodeDrawMode mode, IlBoolean redraw=IlTrue)
	Sets the node presentation mode.
void	setObjectFileName (const char *name)
	Sets the name of the file associated with the chart.
IlBoolean	setObjectName (IlvGanttAbstractObject *object, const char *name, IlBoolean redraw=IlTrue)
	Sets the name of the Gantt object.
IlvGraphic *	setRowGrid (IlvGraphic *compoGrid, IlBoolean redraw=IlTrue, IlInt layer=0)
	Sets the grid for the Gantt rows.
void	setShowingGrapherViewBorders (IlBoolean flag, IlBoolean redraw=IlTrue)
	Sets the visibility of the borders of the grapher views.
IlBoolean	setStep (IlUShort index, IlUShort step, IlBoolean redraw=IlTrue)
	Sets the graduation step.
IlvGraphic *	setSubNodeGraphicModel (IlvGraphic *model, IlBoolean deleteOld=IlTrue)
	Sets the graphic model for subnodes.
IlvGanttSubNodeHook *	setSubNodeHook (IlvGanttSubNodeHook *hook)
	Installs a subnode hook.
void	setSubNodeMinimumSize (IlInt size)
	Sets the minimum size of subnodes.
virtual void	setSubNodeValues (IlvGanttNode *node, IlUShort index, IlInt startMin, IlInt startMax, IlInt endMin, IlInt endMax, IlvGanttLine *line, IlUShort capacity, IlBoolean redraw=IlTrue)
	Sets the values of the subnodes.
void	showFreeNodes (IlBoolean flag, IlBoolean redraw=IlTrue)
	Sets the display flag of the free nodes.
void	showGrid (IlBoolean flag, IlBoolean redraw=IlTrue)
	Sets the grid display.
void	showInterval (IlUShort index, IlInt shownStart, IlInt shownEnd, IlBoolean redraw=IlTrue)
	Modifies the shown start and end times in the grapher views.
virtual void	subNodeBBox (const IlvGanttNode *node, IlUShort index, IlvRect &bbox) const
	Gets the bounding box of a subnode.
virtual IlBoolean	swapLines (IlvGanttLine *line1, IlvGanttLine *line2, IlBoolean redraw=IlTrue)
	Swaps two Gantt lines.
virtual void	translateViews (IlUShort index, IlvPos deltaCol, IlvPos deltaRow, IlBoolean redraw=IlTrue)
	Translates the given view.
virtual void	updateScale (IlvScale *scale, IlBoolean redraw=IlTrue) const
	Updates the scale.
IlUShort	yToClosestRow (IlvPos y) const
	Gets the closest row to a given location.
IlBoolean	yToRow (IlvPos y, IlUShort &row) const
	Gets the row located at a given location.
virtual IlBoolean	zoomViews (IlUShort index, IlvDirection dir, IlUShort fromCol, IlUShort toCol, IlUShort fromRow, IlUShort toRow, IlBoolean redraw=IlTrue)
	Zooms in or out of the given view.
Static Public Member Functions
static IlSymbol *	WorkAreaCallbackType ()
	Returns the callback type for the "Work Area" callback.

---

Detailed Description

Rogue Wave Views Gantt chart user interface class.

Library: ilvgantt

An IlvGanttChart object displays and edits scheduling problem data. Scheduling is the process of assigning resources to activities in time. The general inputs of a scheduling problem are as follows:

• Each resource is identified by its name. It has a given capacity that describes the number of activities it can perform at one time. A resource with a capacity equal to 1 is called a unary resource. Resources are described in the Gantt chart through IlvGanttChart class objects.
• Each activity is identified by its name. It is composed of subactivities, each of which has a minimum and maximum start time, and a minimum and maximum end time. A subactivity has a given capacity that indicates its needed resource capacity. Activities and subactivities are described in the Gantt chart through IlvGanttNode and IlvGanttSubNode class objects.
• Some activities must start or end before other activities begin or end. These constraints are described in the Gantt chart through objects of class IlvGanttLink. A Gantt link has a starting activity, an ending activity, and a delay. This delay is the time that elapses between the two activities.

Objects of type IlvGanttLine, IlvGanttNode, IlvGanttSubNode, and IlvGanttLink represent resources, activities, subactivities, and precedence constraints. All these objects inherit from the abstract class IlvGanttAbstractObject. They encapsulate graphic objects of any subclass of IlvGraphic.

These graphic objects can be created automatically when a line, a node, a subnode, or a link is added to the Gantt chart, or specified by the user through graphic models. A graphic model is an instance of any subclass of IlvGraphic that defines a copy member function that the Gantt chart uses to make a copy of the model. The bounding boxes of the copied graphic objects are computed by the Gantt chart.

The Gantt chart can display and edit this data consistently through the Gantt chart grapher and manager views. These views are created inside the Gantt chart object and attached to a grapher (four views for Gantt nodes and links) and a manager (two views for Gantt lines). The user can scroll these views using the keyboard or mouse. Scrolling can be done step-by-step or page-by-page.

In a Gantt chart, some subnodes can be displayed in highlight mode. To do this, the nodes to be highlighted should be put in a list called a highlight list. All subnodes in this list will be displayed with their normal palettes. The rest of the subnodes will be drawn with a haze as defined in the palette highlight background palette. The subnodes in the list are then clearly displayed.

<align="center">

Gantt chart

See also:

IlvGanttAbstractObject, IlvGanttLine, IlvGanttSubNode, IlvGanttNode, IlvGanttLink.

---

Constructor & Destructor Documentation

IlvGanttChart::IlvGanttChart	(	IlvDisplay *	display,
		const IlvRect &	rect,
		IlInt	start,
		IlInt	end,
		IlInt	shownStart,
		IlInt	shownEnd,
		IlUShort	step,
		IlvDim	rowsize,
		IlvDim	lineInfoSize = 0,
		IlvDim	unitsize = 20,
		IlvDim	scaleH = 32,
		IlvDim	sbsize = 16,
		IlUShort	spacing = 4,
		IlUShort	vwspacing = 20,
		IlUShort	offset = 0,
		IlvDim	handsize = 8,
		IlvPosition	hasScale = IlvTop,
		IlvPosition	hasHSB = IlvBottom,
		IlvPosition	hasVSB = IlvRight,
		int	numLayers = 5,
		IlBoolean	useacc = IlTrue,
		IlvPalette *	palette = 0
	)

Constructor.

The constructor initializes a new Gantt chart for the display display.

It creates a gadget container inside a rectangle of the same height and width as the rectangle indicated by the rect parameter. It computes the bounding boxes of views, scales, scroll bars, and handle boxes. It also creates scroll bars (if any) and the handle box.

Parameters:

	display	The display.
	rect	The size of the Gantt chart.
	start	The start time in the interval managed by the Gantt chart, given as an integer.
	end	The end time in the interval managed by the Gantt chart, given as an integer.
	shownStart	The shown start time, given as an integer.
	shownEnd	The shown end time, given as an integer.
	step	The graduation step on all the Gantt chart views.
	rowSize	The initial width of the manager views.
	lineInfoSize	The width of user-defined regions.
	unitSize	Specifies the line-unit height and subnode height.
	scaleHeight	Indicates the scale height.
	sbsize	Specifies the height of the horizontal scroll bars and the width of the vertical scroll bars.
	spacing	Indicates the spacing between Gantt lines and the left, top, right, and bottom sides of the manager views.
	viewSpacing	Indicates the grapher view spacing.
	margin	Specifies the spacing in pixels between the left, right, top, or bottom edge of Gantt chart and any scale, scroll bar, or view.
	handleSize	Specifies the width or height in pixels of a square box positioned on the middle of the grapher views. This box allows users to adjust the size of the manager and the grapher views by using the mouse.
	hasScale	Specifies where the scale is drawn. This can be set to any of two directions (IlvTop, IlvBottom), indicating the position of the scale, or specified as IlvBadPosition, which means that there is no scale.
	hasHorzScrollBar	Specifies where the horizontal scroll bar is drawn. This can be set to one of two directions (IlvTop, IlvBottom), indicating the position of the scroll bar, or specified as IlvBadPosition, indicating that there is no horizontal scroll bar.
	hasVertScrollBar	Specifies where the vertical scroll bar is drawn. This can be set to one of two directions (IlvLeft, IlvRight), indicating the position of the scroll bar; or specified as IlvBadPosition, indicating that there is no vertical scroll bar.
	layers	Indicates the number of layers to be handled by the grapher.
	useAccelerators	An IlBoolean indicating whether the default accelerators are to be set (for a list of the default accelerators, see Table "Default manager and grapher accelerators" below.
	palette	Specifies the graphic resources of different Gantt chart components (views, scales, scroll bars, handle box). An inverted palette is computed from the given palette and used to draw the lines and nodes added to the Gantt chart.

virtual IlvGanttChart::~IlvGanttChart

(

)

[virtual]

Destructor.

The destructor deletes all the objects (lines, nodes, and links) added to the Gantt chart. It then deletes the grid and scroll hooks connected to the grapher views, the manager, the grapher, and any graphic model set by the user for drawing lines, nodes, or links.

---

Member Function Documentation

void IlvGanttChart::addLine	(	IlvGanttLine *	line,
		IlBoolean	redraw = IlTrue,
		int	layer = 1
	)

Appends a line to the Gantt chart.

Calls the member function insertLine with its row parameter set to the current number of lines managed by the Gantt chart.

Parameters:

	line	The line to add.
	redraw	Indicates whether you want the manager and the grapher to redraw the invalidated area of the display.
	layer	Specifies, if necessary, the layer where this object is to be inserted.

virtual void IlvGanttChart::addLink	(	IlvGanttLink *	link,
		IlBoolean	redraw = IlTrue,
		int	layer = 2
	)			[virtual]

Adds a link to the Gantt chart.

If this link already encapsulates a graphic object, this object is added to the Gantt grapher. Otherwise, the Gantt chart creates a default graphic object. It does this either by copying a graphic model provided by the user (if any), or by using the IlvLinkLabel constructor, and then adds it to the grapher.

Parameters:

	link	The link to add.
	redraw	Indicates whether the grapher redraws the future location of the graphic object before it is drawn at insert time.
	layer	Specifies the layer where this object is to be inserted.

virtual void IlvGanttChart::addNode	(	IlvGanttNode *	node,
		IlBoolean	redraw = IlTrue,
		int	layer = 3
	)			[virtual]

Adds a node to the Gantt chart.

If any of its subnodes already encapsulates a graphic object, this object is added to the Gantt grapher. Otherwise, the Gantt chart creates a default graphic object. It does this either by copying a graphic model provided by the user (if any), or by using the IlvMessageLabel constructor, and then adds it to the grapher.

Parameters:

	node	The node to add.
	redraw	Indicates whether you want the grapher to redraw the future location of the graphic object before it is drawn at insert time.
	layer	Specifies, if necessary, the layer where the object is to be inserted.

virtual IlBoolean IlvGanttChart::addSubNode	(	IlvGanttNode *	node,
		IlvGanttSubNode *	subnode,
		IlBoolean	redraw = IlTrue,
		int	layer = 3
	)			[virtual]

Adds a subnode to the Gantt chart node.

If this subnode already encapsulates a graphic object, this object is added to the Gantt grapher. Otherwise, the Gantt chart creates a default graphic object. It does this either by copying a graphic model provided by the user (if any), or by using the IlvMessageLabel constructor, and then adds it to the grapher.

Parameters:

	node	The node to add the subnode to.
	subNode	The subnode.
	redraw	Indicates whether you want the grapher to redraw the future location of the graphic object before it is drawn at insert time.
	layer	Specifies, if necessary, the layer where the object is to be inserted.

void IlvGanttChart::addSubNodeToHiliteList

(

IlvGanttSubNode *

subnode

)

Adds a subnode to the highlight list.

The subnode will be highlighted if highlight mode is enabled.

Parameters:

subnode

The subnode to add.

void IlvGanttChart::allowDragDrop

(

IlBoolean

flag

)

Specifies whether drag-and-drop operations are allowed.

Sets the drag-and-drop flag to flag. It allows or prohibits drag- and-drop operations on nodes and subnodes.

Parameters:

flag

Set to IlTrue to allow drag-and-drop operations.

virtual IlvPos IlvGanttChart::compactRow	(	IlUShort	row,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Compresses the height of a given row.

Compresses row row to its minimum height needed to display all its nodes. Automatically called to adjust the height of the related rows when a subnode is added, deleted, moved, or reshaped.

Parameters:

	row	The row.
	redraw	If IlTrue this function redraws the views of the IlvGanttChart.

Returns:

The difference between the new and the old heights. If it returns null, the height of row has not changed.

void IlvGanttChart::computeGridPoints

(

IlUShort

index

)

Computes the grid points.

Computes the grid points and stores them in the internal data members _gridXPoints and _gridYPoints.

Parameters:

index

The index of the grapher view (0 - 1)

virtual IlvGanttGridViewHook* IlvGanttChart::createGridHook	(	IlvGrapher *	grapher,
		IlvView *	view
	)			[virtual]

Creates the grid hook connected to the view of the grapher.

Parameters:

	grapher	The grapher.
	view	The view.

Returns:

The grid hook connected to the view of the grapher.

virtual IlvScale* IlvGanttChart::createScale	(	IlvDisplay *	display,
		const IlvPoint &	origin,
		IlvDim	size,
		IlInt	start,
		IlInt	end,
		IlUShort	step,
		IlvPosition	p = IlvTop
	)			const [virtual]

Creates a scale object.

Creates and returns the scale graphic object at the origin point.

Parameters:

	display	The display.
	origin	The point where to create the scale.
	size	The scale size.
	start	The starting limit of the shown time.
	end	The ending limit of the shown time.
	step	The graduation step on the Gantt chart view.
	p	The position of the scale.

virtual IlvGanttScrollViewHook* IlvGanttChart::createScrollHook	(	IlvGrapher *	grapher,
		IlvView *	view
	)			[virtual]

Creates the scroll hook connected to the view.

Parameters:

	grapher	The grapher.
	view	The view.

Returns:

The scroll hook connected to the view of the grapher.

virtual void IlvGanttChart::deleteAll	(	IlBoolean	destroy,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Removes all the objects stored in the chart.

If the destroy parameter is set to IlTrue, the objects are destroyed. If this parameter is set to IlFalse, the objects are removed but not destroyed. In both cases, graphic objects are destroyed.

Parameters:

	destroy	Specifies whether objects are destroyed after they are removed.
	redraw	Specifies whether you want the manager and the grapher to redraw their views.

Reimplemented in IlvGanttChartForm.

virtual void IlvGanttChart::deleteNodes	(	IlBoolean	destroy,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Deletes the Gantt nodes and links stored in the Gantt chart.

If the destroy parameter is set to IlTrue, the objects are removed and destroyed. If this parameter is set to IlFalse, the objects are removed, but not destroyed. In both cases, graphic objects are destroyed.

Parameters:

	destroy	Indicates whether objects are destroyed after being removed.
	redraw	IlTrue if you want the manager and the grapher to redraw their views.

virtual void IlvGanttChart::drawGrid	(	IlvPort *	dst,
		IlUShort	index,
		IlBoolean	skipCompute = IlFalse,
		const IlvRegion *	clip = 0,
		IlvTransformer *	trans = 0,
		IlvDirection	direction = (IlvDirection)(IlvHorizontal|IlvVertical)
	)			[virtual]

Draws the grid in the given port.

This method takes an optional trans and an optional direction parameter. If the trans parameter equals 0, this function will use the associated views transformer.

Parameters:

	dst	The port.
	index	Indicates the grapher view for which the grid points are computed.
	skipCompute	Indicates whether this function calls the computeGridPoints member function.
	clip	The clipping region.
	trans	The transformer of the grapher view.
	direction	Indicates whether the horizontal and/or the vertical grid lines should be drawn.

void IlvGanttChart::emptyHiliteList

(

)

Resets the highlight list to empty.

This means that no subnodes are highlighted.

virtual void IlvGanttChart::ensureVisible	(	IlvManager *	manager,
		IlvView *	view,
		const IlvPoint &	point,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Translates the working view according to the mouse position.

Modifies the view transformer so that point remains visible in view and any other view that is concerned by this operation. You can set the parameter redraw to IlFalse if you do not want to refresh the view contents.

Parameters:

	manager	The manager of the view to translate.
	view	The view of the Gantt chart.
	point	The mouse position.
	redraw	Set to IlTrue to refresh the view contents.

IlUShort IlvGanttChart::firstVisibleRow

(

IlUShort

index

)

const

Gets the first visible row of the manager view.

Parameters:

index

The index of the manager view; 0 for the top manager views and 1 for the bottom.

Returns:

The first visible row of the manager view.

virtual void IlvGanttChart::fitViewsTransformerToContents	(	IlUShort	index,
		IlvDirection	dir,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Computes the transformer so it shows every object stored in all the visible layers.

Computes the transformer of the view indicated by index and all other manager and grapher views that have the same column and row as this view, so it shows every object stored in all the visible layers. The dir parameter can be set to one of three values (IlvHorizontal, IlvVertical, IlvHorizontal|IlvVertical), indicating the direction on which the fit-to-contents is applied. Set the parameter redraw to IlFalse to not refresh the view contents.

Parameters:

	index	The index of the view.
	dir	The direction on which the fit-to-contents is applied.
	redraw	Specifies whether the view contents are refreshed.

IlvGraphic* IlvGanttChart::getBreakGraphicModel

(

)

const

Gets the break graphic model currently used.

Returns:

The break graphic model currently used.

IlInt IlvGanttChart::getEnd

(

)

const

Gets the end time managed by the chart.

Returns:

The final time managed by the Gantt chart.

IlvGrapher* IlvGanttChart::getGrapher

(

)

const

Gets the grapher stored in the chart.

Returns:

The grapher stored in the Gantt chart.

IlvView* IlvGanttChart::getGrapherView

(

IlUShort

index

)

const

Returns the grapher view indicated by index.

The index parameter can be set to any of the four values (0, 1, 2, 3), indicating the top-left, top-right, bottom-left, or bottom-right view.

Parameters:

index

The index number of the grapher view.

Returns:

The indicated grapher view.

IlvGanttGridViewHook* IlvGanttChart::getGridHook

(

IlUShort

index

)

const

Returns the grid hook connected to the view indicated by index.

The index can have one of four values, which indicates the grapher view:

• 0 = top-left
• 1 = top-right
• 2 = bottom-left
• 3 = bottom-right

Parameters:

index

The index of the view.

Returns:

The grid hook connected to the specified view.

IlvPalette* IlvGanttChart::getGridPalette

(

)

const

Returns the palette used to draw the grid.

Returns the palette used to draw the grid in the drawGrid() function.

IlvFilledRectangle* IlvGanttChart::getHandle

(

)

const

Gets the handle box that controls the size of the views.

Returns:

The handle box that controls the size of the manager and grapher views.

IlvPalette* IlvGanttChart::getHiliteBackGroundPalette

(

)

const

Gets the highlight background palette.

Returns:

The highlight background palette.

IlBoolean IlvGanttChart::getHiliteState

(

)

const

Gets the highlight state.

Indicates whether the Gantt chart is in highlight mode.

Returns:

IlTrue if the Gantt chart is in highlight mode.

IlvScrollBar* IlvGanttChart::getHorizontalScrollBar

(

IlUShort

index

)

const

Gets the horizontal scroll bar.

Parameters:

index

The index number of the horizontal scroll bar. It can be set to any of the two values (0, 1), requiring the left or the right scroll bar.

Returns:

The indicated horizontal scroll bar.

IlvGanttLine* IlvGanttChart::getLine

(

IlUShort

row

)

const

Gets a Gantt line.

Parameters:

row

The row where the line is located.

Returns:

The Gantt line located at row in the Gantt chart.

virtual IlvRect& IlvGanttChart::getLineArea

(

IlvRect &

area

)

const [virtual]

Returns the bounds of the Gantt lines.

This function computes the bounding box of the Gantt lines.

Parameters:

area

The bounds of the Gantt lines.

Returns:

The reference to area.

Reimplemented in IlvGanttChartForm.

IlvGraphic* IlvGanttChart::getLineGraphicModel

(

)

const

Gets the line graphic model of the Gantt chart.

Returns:

The line graphic model of the Gantt chart, or 0 if they have not been given a line graphic model.

IlvGraphic* IlvGanttChart::getLineGrid

(

)

const

Gets the line grid currently being used.

Returns the line grid currently used in the Gantt chart.

Returns:

The line grid currently used. It returns null if no line grid has been set.

IlInt IlvGanttChart::getLineLoad	(	IlUShort	row,
		IlInt	time
	)			const

Gets the difference between the capacity of a line and the sum of the capacities of all subnodes intersecting with a vertical axis.

Parameters:

	row	The row where the line is located.
	time	The position of the vertical axis.

Returns:

The difference between the capacity of the line and the sum of the capacities of all subnodes and intersecting with a vertical axis.

IlUShort IlvGanttChart::getLineRow

(

const IlvGanttLine *

line

)

const

Gets the row where the given Gantt line is located.

Parameters:

line

The Gantt line.

Returns:

The row where the given Gantt line is located.

IlvGanttLine** IlvGanttChart::getLines

(

IlUShort &

count

)

const

Gets lines managed by the Gantt chart.

You must delete the returned array when you no longer need it.

Parameters:

count

Set to the number of lines in the array.

Returns:

An array of pointers to the Gantt lines managed by the Gantt chart.

IlvGanttSubNode** IlvGanttChart::getLineSubNodes	(	IlUInt &	count,
		IlUShort	row
	)			const

Gets the subnodes associated with the Gantt line.

You must delete the array when you no longer use it.

Parameters:

	count	Set to the number of subnodes in the array.
	row	The row where the line is located.

Returns:

An array of pointers to the Gantt subnodes associated with the Gantt line located at row.

IlvGraphic* IlvGanttChart::getLinkGraphicModel

(

)

const

Gets the graphic model of the links.

Returns:

The graphic model of the Gantt chart links, or 0 if they have not been given a graphic model.

IlvManager* IlvGanttChart::getManager

(

)

const

Gets the manager stored in the chart.

Returns:

The manager stored in the Gantt chart.

IlvView* IlvGanttChart::getManagerView

(

IlUShort

index

)

const

Returns the manager view indicated by index.

The index parameter can be set to any of the two values (0, 1), indicating the top or bottom view.

Parameters:

index

The index number of the manager view.

Returns:

The indicated manager view.

IlvGanttNodeDrawMode IlvGanttChart::getNodeDrawMode

(

)

const

Gets the node presentation mode.

This presentation mode can be one of the following values indicating the left and right positions of the graphic object representing the node:

• IlvGanttNodeDrawMin - Draws the node between startMin and endMin.
• IlvGanttNodeDrawMax - Draws the node between startMax and endMax.
• IlvGanttNodeDrawComplete - Draws the node between startMin and endMax.
• IlvGanttNodeDrawDefault - Draws the node using the mode set with the IlvGanttNode::setDrawMode member function.

Returns:

The node presentation mode of the Gantt chart.

IlvGanttNode** IlvGanttChart::getNodes

(

IlUInt &

count

)

const

Gets the nodes managed by the chart.

You must delete the returned array when you no longer need it.

Parameters:

count

Set to the number of nodes in the array.

Returns:

An array of pointers to the Gantt nodes managed by the Gantt chart.

IlvGanttAbstractObject* IlvGanttChart::getObject

(

const char *

name

)

const

Gets the Gantt object with the given name.

Returns the Gantt object (line, node, or link) with the name indicated by name.

Parameters:

name

The name of the Gantt object.

Returns:

The Gantt object with the given name. If there is none, it returns 0.

IlvGanttAbstractObject* IlvGanttChart::getObject

(

const IlvGraphic *

graphic

)

const

Gets the Gantt object.

Returns the Gantt object (line, node, or link) associated with the graphic object graphic in the Gantt chart.

Parameters:

graphic

The graphic object.

Returns:

The Gantt object associated with the given graphic object in the Gantt chart. If there is none, it returns 0.

const char* IlvGanttChart::getObjectName

(

const IlvGanttAbstractObject *

obj

)

const

Gets the name of the Gantt object.

Parameters:

obj

The Gantt object.

Returns:

The name of the given Gantt object, or 0 if it has not been given a name.

IlvGraphic* IlvGanttChart::getRowGrid

(

)

const

Gets the row grid currently being used.

Returns the row grid currently used in the Gantt chart.

Returns:

The row grid currently used. It returns null if no row grid has been set.

IlvScale* IlvGanttChart::getScale

(

IlUShort

index

)

const

Gets a scale object.

Returns the scale object (if any) indicated by index. The index parameter can be set to any of two values (0, 1), indicating the left or right scale.

Parameters:

index

The index number of the scale object.

Returns:

The indicated scale object.

IlvGanttScrollViewHook* IlvGanttChart::getScrollHook

(

IlUShort

index

)

const

Gets the scroll hook connected to the view.

The index can have one of four values, which indicates the grapher view:

• 0 = top-left
• 1 = top-right
• 2 = bottom-left
• 3 = bottom-right

Parameters:

index

The index of the view.

Returns:

The scroll hook connected to the view.

IlInt IlvGanttChart::getShownEnd

(

IlUShort

index

)

const

Gets the current shown end time for the grapher views.

Parameters:

index

0 for the left grapher views, and 1 for the right.

Returns:

The current shown end time in the grapher views.

IlInt IlvGanttChart::getShownStart

(

IlUShort

index

)

const

Gets the current shown start time for the grapher views.

Parameters:

index

0 for the left grapher views, and 1 for the right.

Returns:

The current shown start time in the grapher views.

IlInt IlvGanttChart::getStart

(

)

const

Gets the start time managed by the chart.

Returns:

The initial time managed by the Gantt chart.

IlUShort IlvGanttChart::getStep

(

IlUShort

index

)

const

Gets the graduation step in the grapher views of the Gantt chart.

Parameters:

index

0 for the left grapher views, and 1 for the right.

Returns:

The time graduation step in the grapher views of the Gantt chart.

IlvGanttSubNode* IlvGanttChart::getSubNode

(

const IlvGraphic *

graphic

)

const

Returns the Gantt subnode associated with the graphic object graphic in the Gantt chart.

Parameters:

graphic

The graphic object.

Returns:

The Gantt subnode associated with the given graphic object in the Gantt chart. If there is none, it returns 0.

void IlvGanttChart::getSubNodeDrawnStartEnd	(	const IlvGanttNode *	node,
		IlUShort	index,
		IlInt &	start,
		IlInt &	end
	)			const

Gets the positions of the given subnode.

Parameters:

	node	The node.
	index	The position of the subnode.
	start	The start position.
	end	The end position.

IlvGraphic* IlvGanttChart::getSubNodeGraphicModel

(

)

const

Gets the graphic model of the subnodes.

Returns:

The graphic model of the Gantt chart subnodes, or 0 if they do not have a graphic model.

IlvGanttSubNodeHook* IlvGanttChart::getSubNodeHook

(

)

Gets the subnode hook installed in a Gantt chart.

Returns:

The installed subnode hook.

IlInt IlvGanttChart::getSubNodeMinimumSize

(

)

const

Gets the minimum size of subnodes.

You cannot create a subnode with a size smaller than this size using IlvGanttSelectInteractor.

Returns:

The minimum size of subnodes.

IlvScrollBar* IlvGanttChart::getVerticalScrollBar

(

IlUShort

index

)

const

Gets the vertical scroll bar.

Parameters:

index

The index number of the vertical scroll bar. It can be set to any of the two values (0, 1), requiring the top or the bottom scroll bar.

Returns:

The indicated vertical scroll bar.

IlvRect& IlvGanttChart::getWorkArea

(

IlvRect &

area

)

const

Returns the work area.

This function computes the whole work area of the Gantt chart. The work area is the bounding box of the Gantt rows.

Parameters:

area

The work area.

Returns:

The reference to area.

void IlvGanttChart::grapherViewsBBox

(

IlvRect &

bbox

)

const

Gets the bounding box of the four grapher views.

Parameters:

bbox

The bounding box.

Returns:

The bounding box containing the four grapher views.

virtual void IlvGanttChart::handleReshape

(

const IlvPoint &

handlePosition

)

[virtual]

Handles the resizing of views.

Called when the manager and grapher views are adjusted using the handle box. The new position of this box is given by handlePosition. This function takes care of any necessary resizing of views inside the Gantt chart.

Parameters:

handlePosition

The new position of the handle box.

virtual void IlvGanttChart::handleResize

(

const IlvRect &

newsize

)

[virtual]

Handles the resizing of Gantt chart components.

Called when the Gantt chart is resized. newsize is set to the new size of the object. This function takes care of any necessary resizing of scales, scroll bars, and views inside the Gantt chart.

Parameters:

newsize

The new size of the object.

virtual void IlvGanttChart::insertLine	(	IlvGanttLine *	line,
		IlUShort	row,
		IlBoolean	redraw = IlTrue,
		int	layer = 1
	)			[virtual]

Inserts a line before a row.

If this line already encapsulates a graphic object, this object is added to the Gantt manager. Otherwise, the Gantt chart creates a default graphic object, either by copying a graphic model provided by the user (if any), or by using the IlvMessageLabel constructor, and then adds it to the manager.

If row is greater than the actual number of lines in the chart, the line is added after the last row if the chart does not have a hidden line containing free nodes (see showFreeNodes), or before the last row if there is such a line.

Parameters:

	line	The line to insert.
	row	The row to insert the line into.
	redraw	Indicates whether you want the manager and the grapher to redraw the invalidated area of the display.
	layer	Specifies, if necessary, the layer where this object is to be inserted.

Reimplemented in IlvGanttChartForm.

virtual void IlvGanttChart::installAccelerators

(

)

[virtual]

Adds default accelerators to the manager and the grapher event handlers.

You can set your own accelerators by overloading this function. Following are the default accelerators for the manager and grapher:

Default manager and grapher accelerators

Event Type	Key or Button	Action
IlvKeyDown	[Right]	Translates grapher views to the right.
IlvKeyDown	[Left]	Translates grapher views to the left.
IlvKeyDown	[Down]	Translates grapher and manager views to the bottom.
IlvKeyDown	[Up]	Translates grapher and manager views to the top.
IlvKeyDown	Z	Zooms in into grapher views on the time axis.
IlvKeyDown	U	Zooms out into grapher views on the time axis.
IlvKeyDown	z	Zooms in into grapher and manager views on the vertical axis.
IlvKeyDown	u	Zooms out into grapher and manager views on the vertical axis.
IlvKeyDown	F	Fits to contents on the time axis.
IlvKeyDown	f	Fits to contents on the vertical axis.
IlvKeyDown	I	Returns to the initial state.
IlvKeyDown	N	Shows grapher nodes in minimum mode.
IlvKeyDown	X	Shows grapher nodes in maximum mode.
IlvKeyDown	B	Toggles double-buffering mode between manager and grapher views.

IlBoolean IlvGanttChart::isManaged

(

const IlvGanttAbstractObject *

object

)

const

Indicates whether the given object is managed by the Gantt chart.

Parameters:

object

The object.

Returns:

An IlBoolean value indicating whether the given object is managed by the Gantt chart.

IlBoolean IlvGanttChart::isShowingFreeNodes

(

)

const

Indicates whether the chart shows free nodes.

Returns:

IlTrue if the Gantt chart shows free nodes, and IlFalse if it does not.

IlBoolean IlvGanttChart::isShowingGrapherViewBorders

(

)

const

Indicates whether the borders of the grapher views are drawn.

Returns:

IlTrue if the Gantt chart draws the borders of the grapher views, and IlFalse if it does not.

IlBoolean IlvGanttChart::isShowingGrid

(

)

const

Indicates whether a grid is drawn in the grapher views.

Returns:

IlTrue if the Gantt chart draws a grid in the grapher views, and IlFalse if it does not.

IlUShort IlvGanttChart::lastVisibleRow

(

IlUShort

index

)

const

Gets the last visible row of the manager view.

Parameters:

index

The index of the manager view; 0 for the top manager views and 1 for the bottom.

Returns:

The last visible row of the manager view.

virtual void IlvGanttChart::lineBBox	(	IlUShort	row,
		IlvRect &	bbox
	)			const [virtual]

Gets the bounding box of a graphic object associated with a Gantt line.

Parameters:

	row	The row where the line is located.
	bbox	The bounding box.

Returns:

The bounding box of the graphic object associated with the Gantt line.

virtual void IlvGanttChart::loadObjects

(

IlvInputFile &

file

)

[virtual]

Loads a set of objects from the input file.

Reads a set of IlvGraphic, IlvGanttLine, IlvGanttNode, and IlvGanttLink objects from the input file file.

Parameters:

file

The input file.

virtual void IlvGanttChart::makeView	(	IlvPort *	dst,
		const IlvTransformer *	t = 0
	)			[virtual]

Creates the views.

Creates the gadget container, the manager and the grapher, the two manager views, the four grapher views, and the scale objects.

Parameters:

	dst	The port.
	t	The transformer.

Reimplemented from IlvContainerRectangle.

Reimplemented in IlvGanttChartForm.

void IlvGanttChart::moveHandle

(

const IlvPoint &

position

)

Moves the handle box to a new position.

Moves the handle box to position and resizes the manager and grapher views accordingly.

Parameters:

position

The new position of the handle box.

virtual IlBoolean IlvGanttChart::moveLine	(	IlvGanttLine *	line,
		IlUShort	row,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Moves the line to the given row.

Parameters:

	line	The line to move.
	row	The row to move the line to.
	redraw	Set to IlFalse if you do not want an immediate refresh of the display to take place.

Returns:

IlTrue if the line is not one of the internal hidden lines created to hold free nodes and is not already located at row. Otherwise, this function returns IlFalse.

virtual IlBoolean IlvGanttChart::prettyRowBBox	(	IlUShort &	row,
		IlvRect &	prettyBox,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Compresses the height of a given row.

Compresses row row to its minimum height needed to display all its nodes. The new size of the row is return in prettyBox.

This function is called in the compactRow member function.

Parameters:

	row	The row.
	prettyBox	The new size of the row.
	redraw	If IlTrue this function redraws the compacted row.

Returns:

IlTrue if row has been compressed.

virtual void IlvGanttChart::prettySubNodeBBox	(	IlvGanttNode *	node,
		IlUShort	index,
		IlvRect &	bbox,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Gets the prettied bounding box of a subnode.

The default implementation of this function calls subNodeBBox, adjusts the y position of the returned bounding box so that this subnode does not overlap with any other subnode in the Gantt chart, and resizes the subnode row height as needed.

Parameters:

	node	The node.
	index	The position of the requested subnode.
	bbox	The bounding box.
	redraw	Set to IlFalse to not refresh the view contents.

virtual void IlvGanttChart::psDump	(	const char *	filename,
		IlUInt	xmargin = 20,
		IlUInt	ymargin = 20,
		IlBoolean	rotate = IlTrue
	)			const [virtual]

Creates a dump file for PostScript printing.

Creates a dump file of the Gantt chart object into the text file filename that can be immediately printed on a PostScript(R) printer.

Parameters:

	filename	The name of the text file to dump into.
	xmargin	Specifies the offset of the printed object from the left and the right sides of the output paper.
	ymargin	Specifies the offset of the printed object from the top and the bottom sides of the output paper.
	rotate	IlFalse if you do not want to apply a rotation of 90 degrees to the printed object.

void IlvGanttChart::readObjectFile

(

IlBoolean

redraw = IlTrue

)

Reads a set of IlvGraphic, IlvGanttLine, IlvGanttNode, and IlvGanttLink objects from the file associated with the Gantt chart.

Parameters:

redraw

Specifies whether the Gantt chart is refreshed.

virtual void IlvGanttChart::removeHooks

(

)

[virtual]

Removes the hooks from the grapher.

Disconnects the grid and scroll hooks from the Gantt grapher.

virtual IlBoolean IlvGanttChart::removeLine	(	IlUShort	row,
		IlBoolean	redraw = IlTrue,
		IlBoolean	destroy = IlTrue
	)			[virtual]

Removes a line located at a row from the Gantt chart object set.

You can specify IlFalse as the value of the destroy parameter in order not to call delete for this line and these subnodes (and their encapsulated graphic object) when they are removed from the Gantt chart. This can be useful if you plan to use them once they are no longer managed.

A node which has all its subnodes removed by this function is removed in the same way. A line cannot be removed if the row parameter is greater than or equal to the total number of rows in the chart.

Parameters:

	row	The row where the line and the subnodes are located.
	redraw	Indicates whether you want the manager and the grapher to redraw the invalidated area of the display.
	destroy	IlTrue to call delete for this line and these subnodes when they are removed.

Returns:

IlFalse on error (the line cannot be removed), and IlTrue on success.

virtual IlBoolean IlvGanttChart::removeLink	(	IlvGanttLink *	link,
		IlBoolean	redraw = IlTrue,
		IlBoolean	destroy = IlTrue
	)			[virtual]

Removes a link from the Gantt chart object set.

You can specify IlFalse as the value of the destroy parameter in order not to call delete for this link (and its encapsulated graphic object) when it is removed from the Gantt chart. This can be useful if you plan to use the link once it is no longer managed.

A link cannot be removed if link is not already added to (managed by) the Gantt chart.

Parameters:

	link	The link to remove.
	redraw	Specifies whether you want the grapher to redraw the invalidated area of the display.
	destroy	IlTrue to call delete for this node when it is removed.

Returns:

IlFalse on error (the link cannot be removed) and IlTrue on success.

virtual IlBoolean IlvGanttChart::removeNode	(	IlvGanttNode *	node,
		IlBoolean	redraw = IlTrue,
		IlBoolean	destroy = IlTrue
	)			[virtual]

Removes a node from the Gantt chart object set.

Specify IlFalse as the value for destroy to not delete its subnodes (and the graphic objects that represent these subnodes) when it is removed from the Gantt chart. This is useful when using this node once it is no longer managed.

Parameters:

	node	The node to remove.
	redraw	Indicates whether the grapher is to redraw the invalidated area of the display.
	destroy	IlTrue to call delete for this node when it is removed.

Returns:

IlFalse on error (the node cannot be removed) and IlTrue on success. A node cannot be removed if node is not already added to (managed by) the Gantt chart.

virtual IlBoolean IlvGanttChart::removeSubNodes	(	IlvGanttNode *	node,
		IlUShort *	indexArray,
		IlUShort	num,
		IlBoolean	redraw = IlTrue,
		IlBoolean	destroy = IlTrue
	)			[virtual]

Removes subnodes from the Gantt chart node.

Specify IlFalse as the value for destroy to not delete the subnodes (and the graphic objects that represent these subnodes) when they are removed from the Gantt chart. A subnode cannot be removed if num is 0.

Parameters:

	node	The Gantt chart node.
	indexArray	The index of subnodes.
	num	The number of elements stored in indexArray.
	redraw	IlTrue if you want the grapher to redraw the invalidated area of the display.
	destroy	IlTrue to call delete for this node when it is removed.

Returns:

IlFalse on error (the subnode cannot be removed) and IlTrue on success.

virtual void IlvGanttChart::resetViewsTransformer	(	IlUShort	index,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Resets the transformer so that the initial transformer can be applied.

Resets the transformer of the view indicated by index and all other manager and grapher views having the same column and row as this view, so the initial transformer is applied to them. Set the parameter redraw to IlFalse to not refresh the view contents.

Parameters:

	index	The index of the view.
	redraw	Specifies whether the view contents is refreshed.

void IlvGanttChart::rowBBox	(	IlUShort	row,
		IlvRect &	bbox
	)			const

Gets the bounding box of a region that contains the graphic object associated with a Gantt line.

The returned bounding box includes the spacing between the manager views and the Gantt lines, and any information attached to this line.

Parameters:

	row	The row where the line is located.
	bbox	The bounding box.

Returns:

The bounding box of the region that contains the graphic object associated with the Gantt line.

virtual void IlvGanttChart::rowResized	(	IlUShort	row,
		IlvPos	dh
	)			const [virtual]

Used to indicate that a Gantt row has been resized.

Called after the Gantt chart modifies the height of the row indicated by the first parameter to fit in all its subnodes. The default implementation calls the "Work Area" callback.

Parameters:

	row	Indicates which row has been resized.
	dh	Indicates the distance between the current row height and the previous row height.

IlUShort IlvGanttChart::rows

(

)

const

Gets the number of rows in the Gantt chart.

Returns:

The number of rows.

virtual void IlvGanttChart::saveObjects

(

IlvOutputFile &

file

)

const [virtual]

Writes the descriptions of the objects stored in the manager to the output file.

Writes in the output file file:

• The full description of the IlvGraphic objects stored in the manager.
• A complete description of the associated IlvGanttLine objects.
• The full description of the IlvGraphic objects stored in the grapher.
• A complete description of the associated IlvGanttNode and IlvGanttLink objects.

Parameters:

file

The output file.

void IlvGanttChart::setBreakGraphicModel	(	IlvGraphic *	model,
		IlBoolean	destroyOld = IlTrue
	)

Sets the break graphic model.

Parameters:

	model	The break graphic model.
	destroyOld	If IlTrue, the old break graphic model will be deleted.

virtual void IlvGanttChart::setDoubleBuffering

(

IlBoolean

doubleBuffer

)

[virtual]

Enables or disables double buffering.

When double buffering is enabled, the manager views and the grapher views of the Gantt chart use double buffering to refresh themselves.

Parameters:

doubleBuffer

Indicates whether double buffering should be enabled.

Reimplemented in IlvGanttChartForm.

void IlvGanttChart::setGridPalette

(

IlvPalette *

palette

)

Sets the palette used to draw the grid.

Sets the palette used to draw the grid in the drawGrid() function. This function expects a shared IlvPalette.

Parameters:

palette

The new grid palette, which must be a shared palette.

void IlvGanttChart::setHiliteBackGroundPalette

(

IlvPalette *

bgPal

)

Sets the highlight background palette.

When the highlight mode of a Gantt chart is enabled, this palette is used to haze out the non-highlighted subnodes.

Parameters:

bgPal

The highlight background palette.

void IlvGanttChart::setHiliteState

(

IlBoolean

hilite = IlTrue

)

Sets the highlight state.

Switches the Gantt chart to highlight mode if hilite is IlTrue. Otherwise it switches the highlight mode off.

Parameters:

hilite

The status of the highlight mode.

IlvGraphic* IlvGanttChart::setLineGraphicModel	(	IlvGraphic *	model,
		IlBoolean	deleteOld = IlTrue
	)

Sets the line graphic model for the Gantt chart.

This model is copied each time a line that does not yet encapsulate a graphic object is added to the Gantt chart. This Gantt chart computes the appropriate bounding box of the line and reshapes the copied graphic object accordingly.

Parameters:

	model	The graphic model.
	deleteOld	Indicates whether the previous model is to be deleted.

Returns:

The old subnode graphic model.

IlvGraphic* IlvGanttChart::setLineGrid	(	IlvGraphic *	compoGrid,
		IlBoolean	redraw = IlTrue,
		IlInt	layer = 0
	)

Sets the grid for the Gantt lines.

The line grid is an IlvGraphic displayed in the manager views to show the grid between the Gantt lines. The line grid object is automatically resized by the IlvGanttChart each time the line area of the Gantt is changed (for example, when a a new line is added, a line is deleted, or a line is resized).

Parameters:

	compoGrid	The line grid.
	redraw	IlTrue to redraw after setting the grid.
	layer	The layer the grid is added to.

Returns:

The old line grid.

void IlvGanttChart::setLinkGraphicModel	(	IlvGraphic *	model,
		IlBoolean	deleteOld = IlTrue
	)

Sets the graphic model for links.

This model is copied each time a link that does not yet encapsulate a graphic object is added to the Gantt chart. This Gantt chart sets the appropriate start node and end node graphic objects to the copied link graphic object before drawing it. You can specify IlFalse as the value of the destroyOld parameter in order not to call delete for the old graphic model.

Parameters:

	model	The graphic model.
	deleteOld	Indicates whether the previous model is to be deleted.

void IlvGanttChart::setNodeDrawMode	(	IlvGanttNodeDrawMode	mode,
		IlBoolean	redraw = IlTrue
	)

Sets the node presentation mode.

Sets the presentation mode to mode for all nodes managed by this Gantt chart whose presentation mode is currently set to IlvGanttNodeDrawDefault.

Parameters:

	mode	The presentation mode.
	redraw	Specifies whether the Gantt chart is refreshed.

virtual void IlvGanttChart::setNodeDrawMode	(	IlvGanttNode *	node,
		IlvGanttNodeDrawMode	mode,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Sets the node presentation mode.

Sets the presentation mode of node to the value given by the mode parameter. The mode parameter can be set to any of four values indicating the left and right positions of the graphic object representing the node:

• IlvGanttNodeDrawMin - Draws the node between startMin and endMin.
• IlvGanttNodeDrawMax - Draws the node between startMax and endMax.
• IlvGanttNodeDrawComplete - Draws the node between startMin and endMax.
• IlvGanttNodeDrawDefault - Draws the node using the mode set with the IlvGanttNode::setDrawMode.

Parameters:

	node	The node.
	mode	The presentation mode.
	redraw	Specifies whether the Gantt chart is refreshed.

void IlvGanttChart::setObjectFileName

(

const char *

name

)

Sets the name of the file associated with the chart.

This file is read by the Gantt chart when the manager and the grapher views are created.

Parameters:

name

The name of the file.

IlBoolean IlvGanttChart::setObjectName	(	IlvGanttAbstractObject *	object,
		const char *	name,
		IlBoolean	redraw = IlTrue
	)

Sets the name of the Gantt object.

Object names must be unique in the scope of a given Gantt chart. Trying to give the same name to two different objects results in an error and the function returns IlFalse. You can rename an object by calling setObjectName with the new name parameter. You can delete an object name by setting the name parameter to 0 when calling this function. An attempt to erase the name of an unnamed object is an error.

Warning:

[note] You can specify your own IlvGanttSetGraphicName function for a given subtype of IlvGraphic. This function is automatically called (by setObjectName) for all the Gantt objects represented by graphic objects that belong to the given graphic class or any subclass that does not have an associated function. The arg parameter is set to the subnode index if the object parameter is a Gantt node. The Gantt chart library specifies functions for the IlvMessageLabel and IlvLinkLabel classes. You can override the predefined functions or specify your own function for other classes by calling: TheGraphicClass::AddProperty(gantt->nameProperty(), yourFunction); where TheGraphicClass is to be replaced by the name of the given type of IlvGraphic.

Parameters:

	object	The Gantt object to rename. This name must be unique in the scope of the Gantt chart.
	name	The new name of the object.
	redraw	Indicates whether you want the views to be redrawn.

Returns:

IlTrue on success, or IlFalse on failure.

See also:

IlvGanttSetGraphicName

IlvGraphic* IlvGanttChart::setRowGrid	(	IlvGraphic *	compoGrid,
		IlBoolean	redraw = IlTrue,
		IlInt	layer = 0
	)

Sets the grid for the Gantt rows.

The row grid is an IlvGraphic displayed in the grapher views to show the grid between the Gantt rows. The row grid object is automatically resized by the IlvGanttChart each time the work area of the Gantt is changed (for example, when a a new line is added, a line is deleted, or a line is resized).

Parameters:

	compoGrid	The row grid.
	redraw	IlTrue to redraw after setting the grid.
	layer	The layer the grid is added to.

Returns:

The old row grid.

void IlvGanttChart::setShowingGrapherViewBorders	(	IlBoolean	flag,
		IlBoolean	redraw = IlTrue
	)

Sets the visibility of the borders of the grapher views.

Sets the border display flag to flag and redraws the grapher views if needed. You can set the parameter redraw to IlFalse if you do not want to refresh the view contents.

Parameters:

	flag	Set to IlTrue to show the borders.
	redraw	Set to IlTrue to refresh the view contents.

IlBoolean IlvGanttChart::setStep	(	IlUShort	index,
		IlUShort	step,
		IlBoolean	redraw = IlTrue
	)

Sets the graduation step.

You can set the parameter redraw to IlFalse if you do not want to refresh the view contents.

Parameters:

	index	0 for the left grapher views, and 1 for the right.
	step	The time graduation step.
	redraw	Indicates whether the view contents is refreshed.

IlvGraphic* IlvGanttChart::setSubNodeGraphicModel	(	IlvGraphic *	model,
		IlBoolean	deleteOld = IlTrue
	)

Sets the graphic model for subnodes.

This model is copied each time a subnode that does not yet encapsulate a graphic object and whose node does not have a subnode graphic model is added to the Gantt chart. This Gantt chart computes the prettied bounding box of the subnode and reshapes the copied graphic object accordingly. You can specify IlFalse as the value of the destroyOld parameter in order not to call delete for the old graphic model.

Parameters:

	model	The graphic model.
	deleteOld	Indicates whether the previous model is to be deleted.

Returns:

The old subnode graphic model.

IlvGanttSubNodeHook* IlvGanttChart::setSubNodeHook

(

IlvGanttSubNodeHook *

hook

)

Installs a subnode hook.

When you use IlvGanttSelectorInteractor to reshape or move a subnode, this hook will be called.

Parameters:

hook

The subnode hook to install.

void IlvGanttChart::setSubNodeMinimumSize

(

IlInt

size

)

Sets the minimum size of subnodes.

Parameters:

size

The minimum size of the subnodes.

virtual void IlvGanttChart::setSubNodeValues	(	IlvGanttNode *	node,
		IlUShort	index,
		IlInt	startMin,
		IlInt	startMax,
		IlInt	endMin,
		IlInt	endMax,
		IlvGanttLine *	line,
		IlUShort	capacity,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Sets the values of the subnodes.

Sets the minimum and maximum start times, the minimum and maximum end times, the associated line, and the capacity of the index ^th subnode of node.

Parameters:

	node	The node.
	index	The position of the subnode.
	startMin	The minimum start time.
	startMax	The maximum start time.
	endMin	The minimum end time.
	endMax	The maximum end time.
	line	The line associated with the subnode.
	capacity	The capacity of the the subnode.
	redraw	Set to IlFalse to not have the grapher redraw the invalidated area of the display.

void IlvGanttChart::showFreeNodes	(	IlBoolean	flag,
		IlBoolean	redraw = IlTrue
	)

Sets the display flag of the free nodes.

A free node is a node that has no subnodes attached to any user created line. If flag is set to IlTrue, a user can add free nodes to the Gantt chart. This Gantt chart creates an internal hidden line and places it at the final row. If flag is set to IlFalse, this Gantt chart removes all its free nodes from its object set, and ignores any future free nodes added by the user.

Parameters:

	flag	The display flag.
	redraw	Specifies whether the Gantt chart is refreshed.

void IlvGanttChart::showGrid	(	IlBoolean	flag,
		IlBoolean	redraw = IlTrue
	)

Sets the grid display.

Sets the grid display flag to flag and redraws the grapher views if needed. You can set the parameter redraw to IlFalse if you do not want to refresh the view contents.

Parameters:

	flag	Set to IlTrue to set the grid display.
	redraw	Set to IlTrue to refresh the view contents.

void IlvGanttChart::showInterval	(	IlUShort	index,
		IlInt	shownStart,
		IlInt	shownEnd,
		IlBoolean	redraw = IlTrue
	)

Modifies the shown start and end times in the grapher views.

You can set the parameter redraw to IlFalse to not refresh the view contents.

Parameters:

	index	0 for the left grapher views, and 1 for the right.
	redraw	Indicates whether the view contents are refreshed.
	shownStart	The shown start time.
	shownEnd	The shown end time.

virtual void IlvGanttChart::subNodeBBox	(	const IlvGanttNode *	node,
		IlUShort	index,
		IlvRect &	bbox
	)			const [virtual]

Gets the bounding box of a subnode.

Returns the bounding box of the index ^th subnode of node in bbox.

Parameters:

	node	The node
	index	The position of the requested subnode.
	bbox	The bounding box

Returns:

The bounding box of the index ^th subnode of node.

virtual IlBoolean IlvGanttChart::swapLines	(	IlvGanttLine *	line1,
		IlvGanttLine *	line2,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Swaps two Gantt lines.

Swaps the Gantt lines line1 and line2 and returns IlTrue if both lines are managed by the Gantt chart and are different from each other and from any internal hidden line created to hold free nodes. Otherwise, this function returns IlFalse.

Parameters:

	line1	The first Gantt line to swap.
	line2	The second Gantt line to swap.
	redraw	Set to IlFalse if you do not want an immediate refresh of the display to take place.

virtual void IlvGanttChart::translateViews	(	IlUShort	index,
		IlvPos	deltaCol,
		IlvPos	deltaRow,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Translates the given view.

Translates the view indicated by index and all other manager and grapher views that have the same column and row as this view by deltaCol columns and deltaRow rows. You can set the parameter redraw to IlFalse to not refresh the view contents.

Parameters:

	index	The index of the view.
	deltaCol	Number of columns to translate by.
	deltaRow	Number of rows to translate by.
	redraw	Specifies whether the view contents are refreshed.

virtual void IlvGanttChart::updateScale	(	IlvScale *	scale,
		IlBoolean	redraw = IlTrue
	)			const [virtual]

Updates the scale.

This function is called when a new transformation is applied to the corresponding grapher views. You can set the parameter redraw to IlFalse if you do not want to refresh the view contents.

Parameters:

	scale	The scale to update.
	redraw	IlTrue to refresh the view contents.

Reimplemented in IlvGanttChartForm.

static IlSymbol* IlvGanttChart::WorkAreaCallbackType

(

)

[static]

Returns the callback type for the "Work Area" callback.

The "Work Area callback" is called when:

• The start or the end is changed;
• Gantt rows are added or deleted;
• Gantt row heights are changed.

See also:

IlvGraphic::setCallback

IlUShort IlvGanttChart::yToClosestRow

(

IlvPos

y

)

const

Gets the closest row to a given location.

Parameters:

y

The given location.

Returns:

The closest row to y.

IlBoolean IlvGanttChart::yToRow	(	IlvPos	y,
		IlUShort &	row
	)			const

Gets the row located at a given location.

Parameters:

	y	The location to search for a row.
	row	The returned row.

Returns:

IlTrue if there is a row located at y, or IlFalse if there is none.

virtual IlBoolean IlvGanttChart::zoomViews	(	IlUShort	index,
		IlvDirection	dir,
		IlUShort	fromCol,
		IlUShort	toCol,
		IlUShort	fromRow,
		IlUShort	toRow,
		IlBoolean	redraw = IlTrue
	)			[virtual]

Zooms in or out of the given view.

Zooms in or out of the view indicated by index and for all other manager and grapher views having the same column and row as this view. The dir parameter can be set to one of three values (IlvHorizontal, IlvVertical, IlvHorizontal|IlvVertical), indicating the direction on which the zooming will be applied.

The parameters fromCol and toCol are ignored if dir is set to IlvVertical. Likewise, fromRow and toRow are ignored when dir is set to IlvHorizontal. These parameters indicate the lines and the time intervals that are visible on the screen.

Zooming cannot be done when only one row or one column (step) is visible. Unzooming cannot be done when all rows or all columns (steps) are visible.

Set the parameter redraw to IlFalse to not refresh the view contents.

Parameters:

	index	The index of the view.
	dir	The direction on which the zooming will be applied.
	fromCol	The first visible column.
	toCol	The last visible column.
	fromRow	The first visible row.
	toRow	The last visible row.
	redraw	Specifies whether the view contents are refreshed.

Returns:

IlTrue on success, and IlFalse on error (the zooming cannot be done).