5 Graph Description Language (GDL) - Absint

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no: switches off the fine-tuning phase of the graph layout algorithm. The fine-tuning phase tries to give all edges the same length. It tries to improve the ranks of nodes in order to avoid very long edges (see p. 117). • focus Type: no type Default value: no value Attribute of: subgraphs Description: This attribute sets the focus for the summary node of a subgraph, i. e. if the status of the subgraph is folded at startup, then the summary node of the subgraph for which focus was specified is centered in the graph window. Note: The focus can also be specified for nodes (see node attribute p. 93). It goes without saying that the focus attribute should appear only once in a graph specification. • fontname Type: string Default value: default font drawn by turtle graphics routines Attribute of: subgraphs Description: This attribute specifies a pixel font different from the default font and used for drawing the text labels of summary nodes. This font is given by the name of the aiSee font file containing the font description, e.g. a 12-point Times Roman font can be specified via fontname: "timR12". Note: If the font file is not in the current directory the environment variable AISEEFONTS has to be set to the directory containing the font description files. For details on fonts, see p. 106. • fstraight_phase Type: yes, no Default value: no Attribute of: top-level graph Description: yes: forces straight edges that are not anchored at the same position on the border of the nodes. This is useful only if no port sharing (see p. 81) is selected, because bends are avoided by correcting the port position. • gravity Type: float Default value: 0.0625 Attribute of: top-level graph Description: This attribute only applies to the forcedir layout algorithm. It is used for impulse calculation. Only using a simulation of a spring embedder would force unconnected components of a graph to move further and further apart from one another, as there would be no attractive forces acting between them. That is why gravity is introduced as a counterforce. 72
This attribute specifies the constant which is proportional to the gravitational force acting on a node. This constant controls the strength of the gravitational force, e. g. a value of zero cancels out the influence of any gravitational force. For details, see p. 115. • height Type: integer Default value: Top-level graph: (height of root screen - 100) pixels Subgraphs: (height of the label for summary nodes) pixels Attribute of: top-level graph, subgraphs Description: The meaning of this attribute depends on where it is specified: – top-level graph This attribute specifies the height of the display window in pixels. – subgraphs Here it specifies the height of the summary node. See also graph attribute width (p. 90). • hidden Type: integer Default value: none Attribute of: top-level graph Description: This attribute specifies the edge class to be hidden. To hide more than one edge class, repeat this attribute for each additional edge class. For more details, see p. 27. Edges in such a class are ignored during layout calculation and are not drawn. Nodes that are only accessible (forward or backward) via edges of a hidden class are not drawn. However, nodes that are not accessible at all are drawn (see p. 74). Note the difference between hiding edge classes and the edge line style invisible (see p. 103). Hidden edges do not exist in the layout. Edges with the invisible line style exist in the layout, i. e. they influence the layout, meaning they need space and may produce crossings, for example. • horizontal_order Type: integer Default value: none (corresponds to -1) Attribute of: subgraphs Description: In a hierarchical layout, this attribute specifies the horizontal position of the summary node within a level (see p. 89). The nodes specified via horizontal positions are ordered according to these positions within the levels. Nodes without this attribute are inserted into this ordering by the crossing reduction mechanism (see p. 118). 73
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aiSee Graph Visualization User Docu
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3.6 Auxiliaries (User Action) . . .
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6.4.1 Rank Assignment . . . . . . .
Page 9 and 10:
1 Introduction aiSee is a tool that
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3 Usage This chapter describes the
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3.3 Navigating Through a Graph Ther
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• Information field 1, 2, or 3 Th
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focus. The entire graph is drawn in
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• Clicking in an open information
Page 21 and 22: There is no direct interface for pr
Page 23 and 24: • Center width centers horizontal
Page 25 and 26: 4.1.3 Example Figure 7 shows a nest
Page 27 and 28: 4.1.4 Edge Classes - Expose/Hide Ed
Page 29 and 30: Operations: A neighbor region can b
Page 31 and 32: Note: Clustering is an experimental
Page 33 and 34: Figure 9: View Dialog Box • Scrol
Page 35 and 36: Figure 11: Polar Fish-Eye View Self
Page 37 and 38: for a graph and if animation is tur
Page 39 and 40: • Arrow Heads Enables the mode fo
Page 41 and 42: B in the message window (see p. 120
Page 43 and 44: } < list of node attributes > The t
Page 45 and 46: } target: < title of target node >
Page 47 and 48: 5.6 Examples of GDL Specifications
Page 49 and 50: Figure 14: Bent Near, Right-Bent Ne
Page 51 and 52: 06 yspace: 55 07 node: { title:"18"
Page 53 and 54: 22 node: { title:"2" label: "Start"
Page 55 and 56: 11 edge: { source: "0" target: "4"
Page 57 and 58: Figure 21: Example 10, maxdepth; an
Page 59 and 60: • maxoutdegree, finetuning: no Th
Page 61 and 62: Figure 27: Example 11, tree layout,
Page 63 and 64: the style of edges in order to redu
Page 65 and 66: 63 node: { title: "tcsh" level: 6 s
Page 67 and 68: • bmax Type: integer Default valu
Page 69 and 70: specifies the color white. For inst
Page 71: - energetic gravity, Default value:
Page 75 and 76: Attribute of: subgraphs Description
Page 77 and 78: maxdepth and maxdepth do not provid
Page 79 and 80: • magnetic_field1, magnetic_field
Page 81 and 82: 0 for pmin 100 for pmax Attribute o
Page 83 and 84: min sets the minimum number of iter
Page 85 and 86: This parameter only influences the
Page 87 and 88: • tempscheme Type: integer Defaul
Page 89 and 90: For details on user actions, see se
Page 91 and 92: screen, i. e. the x and y coordinat
Page 93 and 94: 5.8 Node Attributes This section de
Page 95 and 96: AISEEICONS can be set to the direct
Page 97 and 98: Description: Specifies the horizont
Page 99 and 100: Description: In a hierarchical layo
Page 101 and 102: - ”solid” Arrow head is a trian
Page 103 and 104: - dotted The edge consists of singl
Page 105 and 106: 5.10 Colors aiSee has a color map o
Page 107 and 108: PostScript, the original PostScript
Page 109 and 110: 5.12 User Action aiSee supports the
Page 111 and 112: - Selecting special characters Spec
Page 113 and 114: egion_attribute : “source” “:
Page 115 and 116: 6 Overview of the Layout Phases The
Page 117 and 118: 6.4 Hierarchical Layout 6.4.1 Rank
Page 119 and 120: The ordering of nodes within one le
Page 121 and 122: 7 Tables 7.1 Node Attributes Table
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Key Menu Item Command Navigation Co
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-notune | -nofinetune See finetunin
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-d minindeg | -d minindegree See la
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-view dcfish See view (p. 90). -vie
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a4 | A4 A4 (21 cm x 30 cm) b5 | B5
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-canim Animates the crossing reduct
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[WiMa92] Wilhelm, Reinhard; Maurer,
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-nomanhattan, 125 -nonearedge, 126
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edge style continuous, 102 dashed,
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near_edges, 80 nearedge, 44, 111 ne
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xspace, 92, 119 y, 90 ybase, 91 yma
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5 Graph Description Language (GDL) - Absint

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