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phoenix_title wx.lib.ogl.lines.LineShape

The LineShape class may be attached to two nodes, it may be segmented, in which case a control point is drawn for each joint.

A LineShape may have arrows at the beginning, end and centre.


class_hierarchy Class Hierarchy

Inheritance diagram for class LineShape:

super_classes Known Superclasses

wx.lib.ogl.basic.Shape


method_summary Methods Summary

__init__

Default class constructor.

AddArrow

Add an arrow (or annotation) to the line.

AddArrowOrdered

Add an arrowhead in the position indicated by the reference list

ClearArrow

Delete the arrow with the given name.

ClearArrowsAtPosition

Delete the arrows at the specified position, or at any position if position is -1.

Delete

Delete the line, unlink it first.

DeleteArrowHead

Delete arrowhead by position and name.

DeleteArrowHeadId

Delete arrowhead by id.

DeleteLineControlPoint

Delete an arbitrary point on the line.

Draggable

Line is not draggable.

DrawArrow

Draw the given arrowhead (or annotation).

DrawArrows

Draw all arrows.

DrawRegion

Format one region at this position.

EraseRegion

Erase one region at this position.

FindArrowHead

Find arrowhead by position and name.

FindArrowHeadId

Find arrowhead by id.

FindLineEndPoints

Finds the x, y points at the two ends of the line.

FindLinePosition

Find which position we’re talking about.

FindMinimumWidth

Find the horizontal width for drawing a line with arrows in

FindNth

Find the position of the line on the given object.

FormatText

Format a text string according to the region size, adding

GetAlignmentEnd

Get alignment end.

GetAlignmentOrientation

Get the alignment orientation.

GetAlignmentStart

Get alignment start

GetAlignmentType

Get the alignment type.

GetArrows

Get the defined arrows.

GetAttachmentFrom

Get the attachment point on the ‘from’ node.

GetAttachmentTo

Get the attachment point on the ‘to’ node.

GetBoundingBoxMin

Get the minimum bounding box.

GetEnds

Get the visible endpoints of the lines for drawing between two objects.

GetFrom

Get the ‘from’ object.

GetLabelPosition

Get the reference point for a label.

GetLineControlPoints

Get the line control points.

GetNextControlPoint

Find the next control point in the line after the start / end point,

GetTo

Get the ‘to’ object.

HitTest

Line hit test.

Initialise

Initialise the line object.

InsertLineControlPoint

Insert a control point at an optional given position.

IsEnd

True if shape is at the end of the line.

IsSpline

If True a spline is drawn through the control points.

MakeControlPoints

Make handle control points.

MakeLineControlPoints

Make a given number of control points.

OnBeginDragLeft

not implemented???

OnCreateLabelShape

Create label shape handler.

OnDragLeft

not implemented???

OnDraw

The draw handler.

OnDrawContents

The draw contents handler.

OnDrawControlPoints

The draw control points handler.

OnDrawOutline

The draw outline handler.

OnEndDragLeft

not implemented???

OnErase

The erase handler.

OnEraseControlPoints

The erase control points handler.

OnLabelMovePre

Label move ‘pre’ handler. ???

OnMoveLink

The move link handler, called when a connected object has moved, to move the link to

OnMoveMiddleControlPoint

The move middle control point handler.

OnMovePre

The move ‘pre’ handler. ???

OnSizingBeginDragLeft

The sizing begin drag left handler.

OnSizingDragLeft

The sizing drag left handler.

OnSizingEndDragLeft

The sizing end drag left handler.

ResetControlPoints

Reset the control points.

Select

Overridden select, to create / delete temporary label-moving objects.

SetAlignmentOrientation

Set the alignment orientation.

SetAlignmentType

Set the alignment type.

SetAttachmentFrom

Set the ‘from’ shape attachment.

SetAttachments

Specify which object attachment points should be used at each end of the line.

SetAttachmentTo

Set the ‘to’ shape attachment.

SetEnds

Set the end positions of the line.

SetFrom

Set the ‘from’ object for the line.

SetIgnoreOffsets

Set whether to ignore offsets from the end of the line when drawing.

SetSpline

Specifies whether a spline is to be drawn through the control points.

SetTo

Set the ‘to’ object for the line.

Straighten

Straighten verticals and horizontals.

Unlink

Unlink the line from the nodes at either end.

api Class API

class LineShape(Shape)

The LineShape class may be attached to two nodes, it may be segmented, in which case a control point is drawn for each joint.

A LineShape may have arrows at the beginning, end and centre.


Methods

__init__(self)

Default class constructor.


AddArrow(self, type, end = ARROW_POSITION_END, size = 10.0, xOffset = 0.0, name = "", mf = None, arrowId = -1)

Add an arrow (or annotation) to the line.

Parameters

  • type – an arrow head type, one of the following

    Arrow head type

    Description

    ARROW_HOLLOW_CIRCLE

    a hollow circle

    ARROW_FILLED_CIRCLE

    a filled circle

    ARROW_ARROW

    an arrow

    ARROW_SINGLE_OBLIQUE

    a single oblique

    ARROW_DOUBLE_OBLIQUE

    a double oblique

    ARROW_METAFILE

    custom, define in metafile

  • end – may be one of the following

    Arrow head type

    Description

    ARROW_POSITION_END

    arrow appears at the end

    ARROW_POSITION_START

    arrow appears at the start

  • size – specifies the length of the arrow

  • xOffset – specifies the offset from the end of the line

  • name – specifies a name

  • mf – mf can be a wxPseduoMetaFile, perhaps loaded from a simple Windows metafile.

  • arrowId – the id for the arrow


AddArrowOrdered(self, arrow, referenceList, end)

Add an arrowhead in the position indicated by the reference list of arrowheads, which contains all legal arrowheads for this line, in the correct order. E.g.

Reference list: a b c d e Current line list: a d

Add c, then line list is: a c d.

If no legal arrowhead position, return FALSE. Assume reference list is for one end only, since it potentially defines the ordering for any one of the 3 positions. So we don’t check the reference list for arrowhead position.

Parameters

  • arrow – an instance of ArrowHead

  • referenceList – ???

  • end – ???


ClearArrow(self, name)

Delete the arrow with the given name.

Parameters

name – name of arrow to delete


ClearArrowsAtPosition(self, end)

Delete the arrows at the specified position, or at any position if position is -1.

Parameters

end – position to clear arrow from


Delete(self)

Delete the line, unlink it first.


DeleteArrowHead(self, position, name)

Delete arrowhead by position and name.

if position is -1, matches any position.

Parameters

  • position – position of arrow to delete or -1

  • name – name of arrow to delete


DeleteArrowHeadId(self, arrowId)

Delete arrowhead by id.

Parameters

arrowId – id of arrow to delete


DeleteLineControlPoint(self)

Delete an arbitrary point on the line.


Draggable(self)

Line is not draggable.

Note

This is really to distinguish between lines and other images. For lines we want to pass drag to canvas, since lines tend to prevent dragging on a canvas (they get in the way.)


DrawArrow(self, dc, arrow, XOffset, proportionalOffset)

Draw the given arrowhead (or annotation).

Parameters

  • dc – an instance of wx.MemoryDC

  • arrow – an instannce of ArrowHead

  • XOffset – the x offset ???

  • proportionalOffset – ???


DrawArrows(self, dc)

Draw all arrows.


DrawRegion(self, dc, region, x, y)

Format one region at this position.

Parameters

  • dc – an instance of wx.MemoryDC

  • dc – an instance of ShapeRegion

  • x – the x position

  • y – the y position


EraseRegion(self, dc, region, x, y)

Erase one region at this position.

Parameters

  • dc – an instance of wx.MemoryDC

  • dc – an instance of ShapeRegion

  • x – the x position

  • y – the y position


FindArrowHead(self, position, name)

Find arrowhead by position and name.

if position is -1, matches any position.

Parameters

  • position – position of arrow to find or -1

  • name – name of arrow to find


FindArrowHeadId(self, arrowId)

Find arrowhead by id.

Parameters

arrowId – id of arrow to find


FindLineEndPoints(self)

Finds the x, y points at the two ends of the line.

This function can be used by e.g. line-routing routines to get the actual points on the two node images where the lines will be drawn to / from.


FindLinePosition(self, x, y)

Find which position we’re talking about.

Parameters

  • x – x position

  • y – y position

Returns

ARROW_POSITION_START or ARROW_POSITION_MIDDLE or ARROW_POSITION_END.


FindMinimumWidth(self)

Find the horizontal width for drawing a line with arrows in minimum space. Assume arrows at end only.


FindNth(self, image, incoming)

Find the position of the line on the given object.

Specify whether incoming or outgoing lines are being considered with incoming.

Parameters

  • image – a node image

  • incoming – True to get incoming lines ???

Returns

nth line, number of lines ???


FormatText(self, dc, s, i)

Format a text string according to the region size, adding strings with positions to region text list.

Parameters

  • dc – an instance of wx.MemoryDC

  • s (str) – the text string

  • i (int) – index to the region to be used???


GetAlignmentEnd(self)

Get alignment end.


GetAlignmentOrientation(self, isEnd)

Get the alignment orientation.

Parameters

isEnd – if True get the type for the begin, else for the end ???


GetAlignmentStart(self)

Get alignment start


GetAlignmentType(self, isEnd)

Get the alignment type.

Parameters

isEnd – if True get the type for the begin, else for the end ???


GetArrows(self)

Get the defined arrows.


GetAttachmentFrom(self)

Get the attachment point on the ‘from’ node.


GetAttachmentTo(self)

Get the attachment point on the ‘to’ node.


GetBoundingBoxMin(self)

Get the minimum bounding box.


GetEnds(self)

Get the visible endpoints of the lines for drawing between two objects.


GetFrom(self)

Get the ‘from’ object.


GetLabelPosition(self, position)

Get the reference point for a label.

Parameters

position – 0 = middle, 1 = start, 2 = end, Region x and y are offsets from this.


GetLineControlPoints(self)

Get the line control points.


GetNextControlPoint(self, shape)

Find the next control point in the line after the start / end point, depending on whether the shape is at the start or end.

Parameters

shape – an instance of Shape ???


GetTo(self)

Get the ‘to’ object.


HitTest(self, x, y)

Line hit test.

Parameters

  • x – x position

  • y – y position


Initialise(self)

Initialise the line object.


InsertLineControlPoint(self, dc = None, point = None)

Insert a control point at an optional given position.

Parameters

  • dc – an instance of wx.MemoryDC

  • point – an optional point, otherwise will use _lineControlPoints


IsEnd(self, nodeObject)

True if shape is at the end of the line.


IsSpline(self)

If True a spline is drawn through the control points.


MakeControlPoints(self)

Make handle control points.


MakeLineControlPoints(self, n)

Make a given number of control points.

Parameters

n (int) – number of control points, minimum of two


OnBeginDragLeft(self, x, y, keys = 0, attachment = 0)

not implemented???


OnCreateLabelShape(self, parent, region, w, h)

Create label shape handler.


OnDragLeft(self, draw, x, y, keys = 0, attachment = 0)

not implemented???


OnDraw(self, dc)

The draw handler.


OnDrawContents(self, dc)

The draw contents handler.


OnDrawControlPoints(self, dc)

The draw control points handler.


OnDrawOutline(self, dc, x, y, w, h)

The draw outline handler.


OnEndDragLeft(self, x, y, keys = 0, attachment = 0)

not implemented???


OnErase(self, dc)

The erase handler.


OnEraseControlPoints(self, dc)

The erase control points handler.


OnLabelMovePre(self, dc, labelShape, x, y, old_x, old_y, display)

Label move ‘pre’ handler. ???


The move link handler, called when a connected object has moved, to move the link to correct position.


OnMoveMiddleControlPoint(self, dc, lpt, pt)

The move middle control point handler.


OnMovePre(self, dc, x, y, old_x, old_y, display = True)

The move ‘pre’ handler. ???


OnSizingBeginDragLeft(self, pt, x, y, keys = 0, attachment = 0)

The sizing begin drag left handler.


OnSizingDragLeft(self, pt, draw, x, y, keys = 0, attachment = 0)

The sizing drag left handler.


OnSizingEndDragLeft(self, pt, x, y, keys = 0, attachment = 0)

The sizing end drag left handler.


ResetControlPoints(self)

Reset the control points.


Select(self, select, dc = None)

Overridden select, to create / delete temporary label-moving objects.


SetAlignmentOrientation(self, isEnd, isHoriz)

Set the alignment orientation.

Parameters

  • isEnd – True or False ???

  • isHoriz – True of False ???


SetAlignmentType(self, isEnd, alignType)

Set the alignment type.

Parameters

  • isEnd – if True set the type for the begin, else for the end ???

  • alignType – one of the following

    Arrow head type

    Description

    LINE_ALIGNMENT_HORIZ

    Align horizontally

    LINE_ALIGNMENT_VERT

    Align vertically

    LINE_ALIGNMENT_TO_NEXT_HANDLE

    Align to next handle

    LINE_ALIGNMENT_NONE

    vertical by default


SetAttachmentFrom(self, attach)

Set the ‘from’ shape attachment.


SetAttachments(self, from_attach, to_attach)

Specify which object attachment points should be used at each end of the line.

Parameters

  • from_attach – the from points ???

  • to_attach – the to points ???


SetAttachmentTo(self, attach)

Set the ‘to’ shape attachment.


SetEnds(self, x1, y1, x2, y2)

Set the end positions of the line.

Param

x1: x1 position

Param

y1: y1 position

Param

x2: x2 position

Param

y2: y2 position


SetFrom(self, object)

Set the ‘from’ object for the line.


SetIgnoreOffsets(self, ignore)

Set whether to ignore offsets from the end of the line when drawing.


SetSpline(self, spline)

Specifies whether a spline is to be drawn through the control points.

Parameters

spline (boolean) – True draw a spline through control points.


SetTo(self, object)

Set the ‘to’ object for the line.


Straighten(self, dc = None)

Straighten verticals and horizontals.

Parameters

dc – an instance of wx.MemoryDC or None


Unlink the line from the nodes at either end.