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Summary

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1 -KIELER.Discontinued Projects.WebHome
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1 -XWiki.stu230980
1 +XWiki.msp
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1 -{{warning}}
2 -KIML has been discontinued and is replaced by the [[Eclipse Layout Kernel (ELK)>>url:http://www.eclipse.org/elk/||shape="rect"]].
3 -{{/warning}}
1 +{{panel title="Project Overview" borderStyle="dashed"}}
2 +Responsible:
4 4  
5 -Project Overview
4 +* {{mention reference="XWiki.msp" style="FULL_NAME" anchor="XWiki-msp-tntYh"/}}
6 6  
7 7  Related Publications:
8 8  
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9 9  * Miro Spönemann, Hauke Fuhrmann, and Reinhard von Hanxleden. //Automatic Layout of Data Flow Diagrams in KIELER and Ptolemy II//. Technical Report 0914, Christian-Albrechts-Universität zu Kiel, Department of Computer Science, 2009. ([[pdf>>url:http://rtsys.informatik.uni-kiel.de/~~biblio/downloads/papers/report-0914.pdf||shape="rect"]] / [[bib>>url:http://rtsys.informatik.uni-kiel.de/~~biblio/cgi-bin/bibcgi.cgi?key=SpoenemannFvH09||shape="rect"]])
10 10  * Hauke Fuhrmann, Miro Spönemann, Michael Matzen, and Reinhard von Hanxleden. Automatic layout and structure-based editing of UML diagrams. In //Proceedings of the 1st Workshop on Model Based Engineering for Embedded Systems Design// (M-BED'10), Dresden, 2010. ([[pdf>>url:http://rtsys.informatik.uni-kiel.de/~~biblio/downloads/papers/mbed10.pdf||shape="rect"]] / [[bib>>url:http://rtsys.informatik.uni-kiel.de/~~biblio/cgi-bin/bibcgi.cgi?key=FuhrmannSM+10||shape="rect"]])
11 11  * Christian Schneider, Miro Spönemann, and Reinhard von Hanxleden. Transient view generation in Eclipse. In //Proceedings of the First Workshop on Academics Modeling with Eclipse//, Kgs. Lyngby, Denmark, 2012. ([[pdf>>url:http://rtsys.informatik.uni-kiel.de/~~biblio/downloads/papers/acme12.pdf||shape="rect"]] / [[bib>>url:http://rtsys.informatik.uni-kiel.de/~~biblio/cgi-bin/bibcgi.cgi?key=SchneiderSvH12a||shape="rect"]])
12 -* Miro Spönemann, Christoph Daniel Schulze, Christian Motika, Christian Schneider, and Reinhard von Hanxleden. KIELER: Building on Automatic Layout for Pragmatics-Aware Modeling (Showpiece). In //Proceedings of the IEEE Symposium on Visual Languages and Human-Centric Computing// (VL/HCC’13), San Jose, CA, USA, 15–19 September 2013. ([[pdf>>url:http://rtsys.informatik.uni-kiel.de/~~biblio/downloads/papers/vlhcc13-showpiece.pdf||shape="rect"]] / [[bib>>url:http://rtsys.informatik.uni-kiel.de/~~biblio/cgi-bin/bibcgi.cgi?key=SpoenemannSM+13||shape="rect"]])
11 +* Miro Spönemann, Christoph Daniel Schulze, Christian Motika, Christian Schneider, and Reinhard von Hanxleden. KIELER: Building on Automatic Layout for Pragmatics-Aware Modeling (Showpiece). In //Proceedings of the IEEE Symposium on Visual Languages and Human-Centric Computing// (VL/HCC’13), San Jose, CA, USA, 15–19 September 2013.
13 13  
14 14  Related Theses:
15 15  
16 16  * Björn Duderstadt, //Evolutionary Meta Layout for KIELER//, May 2011 ([[pdf>>url:http://rtsys.informatik.uni-kiel.de/~~biblio/downloads/theses/bdu-st.pdf||shape="rect" class="extTarget"]])
16 +{{/panel}}
17 17  
18 +
18 18  
19 19  ===== Contents =====
20 20  
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22 22  
23 23  {{toc maxLevel="2"/}}
24 24  
25 -= Getting Started =
26 += Getting Started[[url:http://trac.rtsys.informatik.uni-kiel.de/trac/kieler/wiki/Projects/KIML#GettingStarted||style="text-decoration: none;" title="Link to this section" shape="rect" class="anchor"]] =
26 26  
27 27  This subproject deals with the automatic layout of graph-based models. KIML offers interfaces to connect layout algorithms to diagram editors and viewers. The focus is on flexible configurability, which is a crucial issue for creating good layouts for different graphical languages and in different circumstances. The term //meta layout// relates to the idea of specifying the layout of a diagram on an abstract level, while //concrete layout// information is computed by layout algorithms.
28 28  
29 29  In order to use KIML with your own GMF-based editor, you need to do the following steps:
30 30  
31 -1. Install the "//KIELER Layout for GMF//" feature from our update site, see [[Downloads>>url:http://www.rtsys.informatik.uni-kiel.de/en/research/kieler/||shape="rect"]]
32 -1*. It includes the Java-based layout algorithms developed in the [[KLay project>>doc:KIELER.Discontinued Projects.Layout Algorithms (KLay).WebHome]].
32 +1. Install the "//KIELER Layout for GMF//" feature from our update site, see [[Downloads>>url:http://www.informatik.uni-kiel.de/en/rtsys/kieler/downloads/||shape="rect"]]
33 +1*. It includes the Java-based layout algorithms developed in the [[KLay project>>doc:Layout Algorithms (KLay)]].
33 33  1. Open a diagram and press the layout button [[image:attach:kieler-arrange.gif]] or use the shortcut Ctrl+R L.
34 34  
35 35  Similarly, the "//KIELER Layout for Graphiti//" feature provides the KIML interface to Graphiti-based editors.
36 36  
37 -== Terminology ==
38 +=== Terminology ===
38 38  
39 39  //**Layout Graph**//
40 40  
41 -* Internal representation of the graph structure of the current diagram, built on the [[KGraph>>doc:KIELER.Discontinued Projects.Infrastructure for Meta Layout (KIML).KGraph Meta Model.WebHome]] model.
42 +* Internal representation of the graph structure of the current diagram, built on the [[KGraph>>doc:KGraph Meta Model]] model.
42 42  
43 43  **//Layout Algorithm//**
44 44  
... ... @@ -58,7 +58,7 @@
58 58  
59 59  **//Layout Data//**
60 60  
61 -* Concrete layout data (position and size) and abstract layout data (layout options) attached to elements of the layout graph using the [[KLayoutData>>doc:KIELER.Discontinued Projects.Infrastructure for Meta Layout (KIML).KLayoutData Meta Model.WebHome]] model.
62 +* Concrete layout data (position and size) and abstract layout data (layout options) attached to elements of the layout graph using the [[KLayoutData>>doc:KLayoutData Meta Model]] model.
62 62  
63 63  //**Layout Meta Data**//
64 64  
... ... @@ -84,23 +84,23 @@
84 84  
85 85  * A singleton class for invoking layout algorithms on diagram viewers and editors.
86 86  
87 -= User Interface =
88 += User Interface[[url:http://trac.rtsys.informatik.uni-kiel.de/trac/kieler/wiki/Projects/KIML#UserInterface||style="text-decoration: none;" title="Link to this section" shape="rect" class="anchor"]] =
88 88  
89 89  The main user interface element of KIML is the command to layout the current diagram. This command is available in the toolbar ([[image:attach:kieler-arrange.gif]]) or using the Ctrl+R L shortcut. Additionally, an entry in the context menu allows to layout only a selected part of the diagram.
90 90  
91 -== Layout View ==
92 +== Layout View[[url:http://trac.rtsys.informatik.uni-kiel.de/trac/kieler/wiki/Projects/KIML#LayoutView||style="text-decoration: none;" title="Link to this section" shape="rect" class="anchor"]] ==
92 92  
93 93  [[image:attach:layout_view.png]]
94 94  
95 95  The //Layout// view allows flexible customization of layout options for the selected objects in the diagram. If no object is selected, the view shows the options for the top-level container of the diagram. Options are stored persistently in the notation model of the diagram, so that they are still available after the next Eclipse restart. Of course this requires the diagram to be saved after an option was changed.
96 96  
97 -The options can be grouped according to the function of the selected object. The groups //Node,// //Edge//, //Port//, and //Label// contain options related to the object itself, such as its size or priority, while the groups //Graph// and// Subgraph// contain options for the elements contained in the selected object, such as the applied layout algorithm or the spacing between elements. Which layout options are displayed depends on the types of selected objects and the active layout algorithm, since each algorithm supports only a subset of the available options. Furthermore, some options are only visible if the //Show Advanced Properties// button in the view toolbar is activated. The group types can be hidden using the //Show Categories// button.
98 +The options can be grouped according to the function of the selected object. The groups //Node,// //Edge//, //Port//, and //Label// contain options related to the object itself, such as its size or priority, while the groups //Graph// and// Subgraph// contain options for the elements contained in the selected object, such as the applied layout algorithm or the spacing between elements. Which layout options are displayed depends on the types of selected objects and the active layout algorithm, since each algorithm supports only a subset of the available options. Furthermore, some options are only visible if the //Show Advanced Properties// button in the view toolbar is activated. The group types can be hidden using the //Show Categories// button.
98 98  
99 99  An option can be changed by selecting or entering a new value in the corresponding cell of the //Value// column. The most important option is //Layout Algorithm//, which is used to determine the layout algorithm for the contents of the selected element. Here either a specific layout algorithm or a layout type can be chosen; in the latter case, the most suitable layout algorithm of the given type is taken. By changing the active layout algorithm, the content of the layout view is updated to display only those options that are supported by the new layout algorithm.
100 100  
101 101  Selecting //Restore Default Value// in the context menu or the view toolbar removes any value for the currently selected option that is stored in the current model file, thus resetting the option to its default value. The view menu has an entry //Remove all Layout Options// which resets all options of the current model by removing persistent data in the model file.
102 102  
103 -The standard layout options defined in KIML are documented in [[doc:KIELER.Discontinued Projects.Infrastructure for Meta Layout (KIML).KIML Layout Options.WebHome]]. However, layout algorithms may define additional layout options.
104 +The standard layout options defined in KIML are documented in [[doc:KIML Layout Options]]. However, layout algorithms may define additional layout options.
104 104  
105 105  [[image:attach:context_menu.png]]
106 106  
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108 108  
109 109  The information button of the view toolbar can be used to display some useful details on the current selection, such as the edit part and domain model classes.
110 110  
111 -== Preference Page ==
112 +== Preference Page[[url:http://trac.rtsys.informatik.uni-kiel.de/trac/kieler/wiki/Projects/KIML#PreferencePage||style="text-decoration: none;" title="Link to this section" shape="rect" class="anchor"]] ==
112 112  
113 113  [[image:attach:preference_page.png]]
114 114  
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126 126  
127 127  Creating a new entry requires the selection of the type of related element and entering its class name or identifier. Class names of diagram parts and domain model elements can be explored using the information button of the layout view, while diagram type identifiers can be selected with the //Browse// button. After that, a layout option has to be selected from the list using the corresponding //Browse //button. Hitting //OK// creates an entry, and its value can then be set using the //Edit// button.
128 128  
129 -= Programming Interface =
130 += Internal Structure[[url:http://trac.rtsys.informatik.uni-kiel.de/trac/kieler/wiki/Projects/KIML#InternalStructure||style="text-decoration: none;" title="Link to this section" shape="rect" class="anchor"]] =
130 130  
131 -The primary API of KIML is the [[DiagramLayoutEngine>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml.service/src/de/cau/cs/kieler/kiml/service/DiagramLayoutEngine.java||shape="rect"]], which is responsible for analyzing diagrams, creating a [[KGraph>>doc:KIELER.Discontinued Projects.Infrastructure for Meta Layout (KIML).KGraph Meta Model.WebHome]] structure, configuring and executing the layout algorithms, and writing new position information back to the diagram. It is invoked with
132 +The primary API of KIML is the [[DiagramLayoutEngine>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml.service/src/de/cau/cs/kieler/kiml/service/DiagramLayoutEngine.java||shape="rect"]], which is responsible for analyzing diagrams, creating a [[KGraph>>doc:KGraph Meta Model]] structure, configuring and executing the layout algorithms, and writing new position information back to the diagram. The interaction with the diagram editor or viewer is handled by [[IDiagramLayoutManager>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml.service/src/de/cau/cs/kieler/kiml/service/IDiagramLayoutManager.java||shape="rect"]] implementations.
132 132  
133 -{{code language="java" theme="Eclipse"}}
134 -DiagramLayoutEngine.INSTANCE.layout(workbenchPart, diagramPart)
135 -{{/code}}
134 +The meta layout configuration is done by the [[LayoutOptionManager>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml.service/src/de/cau/cs/kieler/kiml/service/LayoutOptionManager.java||shape="rect"]], which iterates over all graph elements and applies a set of layout configurators, represented by the interface [[ILayoutConfig>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/config/ILayoutConfig.java||shape="rect"]]. Layout configurators analyze the context of each graph element and set specific values for some layout options. Layout options are defined with the extension point {{code language="none"}}layoutProviders{{/code}}. More information on layout configuration is available on [[doc:Configuring Automatic Layout]].
136 136  
137 -where {{code language="none"}}workbenchPart{{/code}} is the Eclipse editor part or view part whose content shall be processed, and {{code language="none"}}diagramPart{{/code}} is a further reference to which part of the diagram the layout shall be applied (may be {{code language="none"}}null{{/code}}).
136 +Hierarchically structured graphs are handled by the [[RecursiveGraphLayoutEngine>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/RecursiveGraphLayoutEngine.java||shape="rect"]], which executes layout algorithms separately on each hierarchy level, starting with the innermost levels. The actual layout computations are performed by subclasses of [[AbstractLayoutProvider>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/AbstractLayoutProvider.java||shape="rect"]], which are registered with the {{code language="none"}}layoutProviders{{/code}} extension point.
138 138  
139 -An overview of the internal structure of KIML is given in the following.
138 +[[~[~[image:url:http://rtsys.informatik.uni-kiel.de/~~~~kieler/files/documentation/kiml-structure.png~]~]>>url:http://rtsys.informatik.uni-kiel.de/~~kieler/files/documentation/kiml-structure.png||style="text-decoration: none;" shape="rect"]]
140 140  
141 -[[~[~[image:attach:kiml-overview.png~]~]>>url:http://rtsys.informatik.uni-kiel.de/~~kieler/files/documentation/kiml-structure.png||shape="rect" style="text-decoration: none;"]]
140 +The singleton class [[LayoutDataService>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/LayoutDataService.java||shape="rect"]] is used to access the available layout algorithms, layout options, diagram types, layout types, and stored option values. Similarly, there are other service classes for accessing the meta data managed by KIML.
142 142  
143 -The interaction with the diagram editor or viewer is handled by //layout managers//, represented by [[IDiagramLayoutManager>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml.service/src/de/cau/cs/kieler/kiml/service/IDiagramLayoutManager.java||shape="rect"]] implementations, explained with more detail below.
142 +KIML makes extensive use of the [[IPropertyHolder>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.core/src/de/cau/cs/kieler/core/properties/IPropertyHolder.java||shape="rect"]] interface; a //property holder// is an object that can give and receive values for specific properties. The key for specifying which property to access is [[IProperty>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.core/src/de/cau/cs/kieler/core/properties/IProperty.java||shape="rect"]], which is usually instanced exactly once for each property. The layout data classes [[KShapeLayout>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/klayoutdata/KShapeLayout.java||shape="rect"]] and [[KEdgeLayout>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/klayoutdata/KEdgeLayout.java||shape="rect"]] are property holders, which means that they can store layout option values for the graph elements they are connected with.
144 144  
145 -The configuration of automatic layout is done by the [[LayoutOptionManager>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml.service/src/de/cau/cs/kieler/kiml/service/LayoutOptionManager.java||shape="rect"]], which iterates over all graph elements and applies a set of layout configurators, represented by the interface [[ILayoutConfig>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/config/ILayoutConfig.java||shape="rect"]]. Layout configurators analyze the context of each graph element and set specific values for some layout options. More information on layout configuration is available on [[doc:KIELER.Discontinued Projects.Infrastructure for Meta Layout (KIML).Configuring Automatic Layout.WebHome]].
144 +== Connecting Layout Algorithms[[url:http://trac.rtsys.informatik.uni-kiel.de/trac/kieler/wiki/Projects/KIML#ConnectingLayoutAlgorithms||style="text-decoration: none;" title="Link to this section" shape="rect" class="anchor"]] ==
146 146  
147 -Hierarchically structured graphs are handled by the [[RecursiveGraphLayoutEngine>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/RecursiveGraphLayoutEngine.java||shape="rect"]], which executes layout algorithms separately on each hierarchy level, starting with the innermost levels. The actual layout computations are performed by subclasses of [[AbstractLayoutProvider>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/AbstractLayoutProvider.java||shape="rect"]], which are registered with the {{code language="none"}}layoutProviders{{/code}} extension point.
146 +Layout algorithms must be connected by extending [[AbstractLayoutProvider>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/AbstractLayoutProvider.java||shape="rect"]]. The input of [[t>>url:http://trac.rtsys.informatik.uni-kiel.de/trac/kieler/wiki/Projects/AbstractLayoutProvider||rel="nofollow" style="text-decoration: none;" shape="rect" class="missing wiki"]]he {{code language="none"}}doLayout{{/code}} method is an instance of the [[KGraph>>doc:KGraph Meta Model]], an [[EMF>>url:http://www.eclipse.org/modeling/emf/||shape="rect"]] based graph structure, together with a progress monitor ([[IKielerProgressMonitor>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.core/src/de/cau/cs/kieler/core/alg/IKielerProgressMonitor.java||shape="rect"]]). The graph is represented by a [[KNode>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.core.kgraph/src/de/cau/cs/kieler/core/kgraph/KNode.java||shape="rect"]], which serves as top-level container. The contained graph elements initially have attached [[KShapeLayout>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/klayoutdata/KShapeLayout.java||shape="rect"]] or [[KEdgeLayout>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/klayoutdata/KEdgeLayout.java||shape="rect"]] with information on the original layout of the diagram as well as an abstract layout specified by layout options. The layout provider should consider layout options from the attached layout data, execute a layout algorithm, and write the concrete results back to the layout data. A good example for a layout provider implementation is [[LayeredLayoutProvider>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.klay.layered/src/de/cau/cs/kieler/klay/layered/LayeredLayoutProvider.java||shape="rect"]].
148 148  
149 -The singleton class [[LayoutMetaDataService>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/LayoutMetaDataService.java||shape="rect"]] is used to access the available layout algorithms, layout options, diagram types, layout types, and stored option values. Similarly, there are other service classes for accessing the meta data managed by KIML. Meta data are stored in XML format according to the extension points mechanism of Eclipse.
148 +The {{code language="none"}}layoutProviders{{/code}} extension point is needed to register layout algorithms; one layout provider class may provide multiple layout algorithms by giving a parameter string in the extension point. The extension point allows to attach information on known layout options, supported diagrams types, and supported graph features to a layout algorithm. The known layout options are those that are offered in the Layout view when the respective algorithm is selected. The supported diagram types are used to automatically select the most suitable algorithm for a specific diagram type: from all algorithms that state to support a given type, the one with the highest priority is taken. The supported graph features are used to state which special features that a graph can contain can be handled by the algorithm; examples for such features are edge labels, ports, or clusters. Furthermore, the extension point can be used to specify new layout options, layout types, and categories of layout algorithms.
150 150  
151 -KIML makes extensive use of the [[IPropertyHolder>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.core/src/de/cau/cs/kieler/core/properties/IPropertyHolder.java||shape="rect"]] interface; a //property holder// is an object that can give and receive values for specific properties. The key for specifying which property to access is [[IProperty>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.core/src/de/cau/cs/kieler/core/properties/IProperty.java||shape="rect"]], which is usually instanced exactly once for each property. The layout data classes [[KShapeLayout>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/klayoutdata/KShapeLayout.java||shape="rect"]] and [[KEdgeLayout>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/klayoutdata/KEdgeLayout.java||shape="rect"]] are property holders, which means that they can store layout option values for the graph elements they are connected with.
150 +Each layout option that is registered in the extension point needs a corresponding constant in Java code, where the most relevant data is replicated with a [[Property>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.core/src/de/cau/cs/kieler/core/properties/Property.java||shape="rect"]] constant for easy use in the implementation of layout algorithms. KIML comes with a large set of built-in layout options, which are all defined in [[LayoutOptions>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/options/LayoutOptions.java||shape="rect"]]. Layout providers can access the layout option values using the [[IPropertyHolder>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.core/src/de/cau/cs/kieler/core/properties/IPropertyHolder.java||shape="rect"]] interface:
152 152  
153 -== Connecting Layout Algorithms ==
154 -
155 -Layout algorithms must be connected by extending [[AbstractLayoutProvider>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/AbstractLayoutProvider.java||shape="rect"]]. The input of [[t>>url:http://trac.rtsys.informatik.uni-kiel.de/trac/kieler/wiki/Projects/AbstractLayoutProvider||rel="nofollow" shape="rect" style="text-decoration: none;" class="missing wiki"]]he {{code language="none"}}doLayout{{/code}} method is an instance of the [[KGraph>>doc:KIELER.Discontinued Projects.Infrastructure for Meta Layout (KIML).KGraph Meta Model.WebHome]], an [[EMF>>url:http://www.eclipse.org/modeling/emf/||shape="rect"]] based graph structure, together with a progress monitor ([[IKielerProgressMonitor>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.core/src/de/cau/cs/kieler/core/alg/IKielerProgressMonitor.java||shape="rect"]]). The graph is represented by a [[KNode>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.core.kgraph/src/de/cau/cs/kieler/core/kgraph/KNode.java||shape="rect"]], which serves as top-level container. The contained graph elements initially have attached [[KShapeLayout>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/klayoutdata/KShapeLayout.java||shape="rect"]] or [[KEdgeLayout>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/klayoutdata/KEdgeLayout.java||shape="rect"]] with information on the original layout of the diagram as well as an abstract layout specified by layout options. The layout provider should consider layout options from the attached layout data, execute a layout algorithm, and write the concrete results back to the layout data. A good example for a layout provider implementation is [[LayeredLayoutProvider>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.klay.layered/src/de/cau/cs/kieler/klay/layered/LayeredLayoutProvider.java||shape="rect"]].
156 -
157 -The {{code language="none"}}layoutProviders{{/code}} extension point is needed to register layout algorithms; one layout provider class may provide multiple layout algorithms by giving a parameter string in the extension point. The extension point allows to attach information on known layout options, supported diagram types, and supported graph features to a layout algorithm. The known layout options are those that are offered in the Layout view when the respective algorithm is selected. The supported diagram types are used to automatically select the most suitable algorithm for a specific diagram type: from all algorithms that state to support a given type, the one with the highest priority is taken. The supported graph features are used to state which special features that a graph can contain can be handled by the algorithm; examples for such features are edge labels, ports, or clusters. Furthermore, the extension point can be used to specify new layout options, layout types, and categories of layout algorithms.
158 -
159 -Each layout option that is registered in the extension point needs a corresponding constant in Java code, where the most relevant data is replicated with a [[Property>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.core/src/de/cau/cs/kieler/core/properties/Property.java||shape="rect"]] constant for easy use in the implementation of layout algorithms. KIML comes with a large set of [[built-in layout options>>doc:KIELER.Discontinued Projects.Infrastructure for Meta Layout (KIML).KIML Layout Options.WebHome]], which are all defined in [[LayoutOptions>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/options/LayoutOptions.java||shape="rect"]]. Layout providers can access the layout option values using the [[IPropertyHolder>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.core/src/de/cau/cs/kieler/core/properties/IPropertyHolder.java||shape="rect"]] interface:
160 -
161 -{{code language="java" theme="Eclipse"}}
152 +{{code theme="Eclipse" language="java"}}
162 162  KShapeLayout nodeLayout = parentNode.getData(KShapeLayout.class);
163 163  boolean isInteractive = nodeLayout.getProperty(LayoutOptions.INTERACTIVE);
164 164  {{/code}}
165 165  
157 +
166 166  
167 167  The layout option that is used in this example has a default value, thus it is guaranteed that the option always returns a valid value. This and the fact that properties are type-safe allows us to implicitly cast and unbox the returned value to a {{code language="none"}}boolean{{/code}} without checking for NullPointerExceptions or ClassCastExceptions.
168 168  
169 -== Connecting Diagram Editors ==
161 +== Connecting Diagram Editors[[url:http://trac.rtsys.informatik.uni-kiel.de/trac/kieler/wiki/Projects/KIML#ConnectingDiagramEditors||style="text-decoration: none;" title="Link to this section" shape="rect" class="anchor"]] ==
170 170  
171 -(% style="line-height:1.4285715" %)The transformation of input diagrams to [[KGraph>>doc:KIELER.Discontinued Projects.Infrastructure for Meta Layout (KIML).KGraph Meta Model.WebHome]] instances as well as the transfer of computed layouts back to the input diagrams is done by (%%)[[IDiagramLayoutManager>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml.ui/src/de/cau/cs/kieler/kiml/ui/diagram/IDiagramLayoutManager.java||shape="rect" style="line-height: 1.4285715;"]](% style="line-height:1.4285715" %) implementations. For most diagram editors that are based on (%%)[[GMF>>url:http://www.eclipse.org/modeling/gmp/||shape="rect" style="line-height: 1.4285715;"]](% style="line-height:1.4285715" %) the generic (%%)[[GmfDiagramLayoutManager>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml.gmf/src/de/cau/cs/kieler/kiml/gmf/GmfDiagramLayoutManager.java||shape="rect"]](% style="line-height:1.4285715" %) can be used, while for (%%)[[Graphiti>>url:http://www.eclipse.org/graphiti/||shape="rect" style="line-height: 1.4285715;"]](% style="line-height:1.4285715" %) there is the generic (%%)[[GraphitiDiagramLayoutManager>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml.graphiti/src/de/cau/cs/kieler/kiml/graphiti/GraphitiDiagramLayoutManager.java||shape="rect"]](% style="line-height:1.4285715" %). However, some customized diagram editors do not work with the generic diagram layout managers and hence require their own specialized implementations, which can be contributed with the extension point {{code language="none"}}layoutManagers{{/code}}.
163 +The extension point {{code language="none"}}layoutInfo{{/code}} is used to define diagram types and to assign default layout options to specific parts of a diagram. Layout options can be associated with elements of the domain model, where the qualified name of the model element interface must be given, or with edit parts of a specific diagram editor, where the qualified class name of the edit part must be given. The diagram type can be assigned by setting the predefined layout option {{code language="none"}}de.cau.cs.kieler.diagramType{{/code}} with the diagram type identifier as value. This helps KIML to find a suitable layout algorithm for a part of the diagram editor without the need of referencing a specific algorithm. For cases when it is not sufficient to bind a layout option value with a domain model class, but the actual value depends on some properties of the runtime domain model instance, the {{code language="none"}}layoutInfo{{/code}} extension point allows to register implementations of [[SemanticLayoutConfig>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml/src/de/cau/cs/kieler/kiml/config/SemanticLayoutConfig.java||shape="rect"]]. This allows to include arbitrary analysis of the domain model in order to derive a layout configuration.
172 172  
173 -(% style="line-height:1.4285715" %)The diagram layout manager implementation that is applicable to the currently selected diagram viewer is chosen based on the {{code language="none"}}supports(Object){{/code}} method: the first implementation that returns {{code language="none"}}true{{/code}} for the respective workbench part instance is selected. Implementations can be assigned a priority in the extension;(%%) diagram layout managers with higher priority are queried first. The object passed to supports(Object){{code language="none"}}{{/code}} can also be an element of the selection. For example, GEF-based editors report edit part instances to the Eclipse selection service. Which diagram layout manager to use for a selected edit part is determined by testing which implementation supports that edit part instance.
165 +The transformation of input diagrams to [[KGraph>>doc:KGraph Meta Model]] instances as well as the transfer of computed layouts back to the input diagrams is done by [[IDiagramLayoutManager>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml.ui/src/de/cau/cs/kieler/kiml/ui/diagram/IDiagramLayoutManager.java||shape="rect"]] implementations. For most diagram editors that are based on [[GMF>>url:http://www.eclipse.org/modeling/gmp/||shape="rect"]] the generic [[GmfDiagramLayoutManager>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml.gmf/src/de/cau/cs/kieler/kiml/gmf/GmfDiagramLayoutManager.java||shape="rect"]] can be used, while for [[Graphiti>>url:http://www.eclipse.org/graphiti/||shape="rect"]] there is the generic [[GraphitiDiagramLayoutManager>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml.graphiti/src/de/cau/cs/kieler/kiml/graphiti/GraphitiDiagramLayoutManager.java||shape="rect"]]. However, some customized diagram editors do not work with the generic diagram layout managers and hence require their own specialized implementations, which can be contributed with the extension point layoutManagers{{code language="none"}}{{/code}}.
174 174  
175 -Each diagram layout manager must be able to map the graph structure of its supported diagram viewers to the [[KGraph>>doc:KIELER.Discontinued Projects.Infrastructure for Meta Layout (KIML).KGraph Meta Model.WebHome]] format using the {{code language="none"}}buildLayoutGraph({{/code}}…{{code language="none"}}){{/code}} method. The result is stored in a [[LayoutMapping>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler-pragmatics/plugins/de.cau.cs.kieler.kiml.service/src/de/cau/cs/kieler/kiml/service/LayoutMapping.java||shape="rect"]], which stores a bidirectional map between graph elements and diagram elements and can be enriched with additional information. Such information is often required when the new computed layout is applied back to the diagram, which is done with {{code language="none"}}applyLayout({{/code}}…{{code language="none"}}){{/code}}. This method is also responsible for applying animation of the transition between the old layout and the new layout and for automatic zooming, if requested.
167 += Graph Analysis[[url:http://trac.rtsys.informatik.uni-kiel.de/trac/kieler/wiki/Projects/KIML#GraphAnalysis||style="text-decoration: none;" title="Link to this section" shape="rect" class="anchor"]] =
176 176  
177 -(% style="line-height:1.4285715" %)There are many ways to customize the configuration of graphs created by layout managers. These are documented in [[doc:KIELER.Discontinued Projects.Infrastructure for Meta Layout (KIML).Configuring Automatic Layout.WebHome]].
169 +KIML offers an interface for graph analysis, available with the [[image:attach:analyzediagram.gif]] button. Here a selection of analyses can be made, which refer to the structure or to the drawing of the graph. After performing the analyses, the results are shown in a dialog and in the Analysis view. New analyses, which must implement [[IAnalysis>>url:http://rtsys.informatik.uni-kiel.de/fisheye/browse/kieler/plugins/de.cau.cs.kieler.kiml.service/src/de/cau/cs/kieler/kiml/service/grana/IAnalysis.java||shape="rect"]], can be registered using the {{code language="none"}}analysisProviders{{/code}} extension point.
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