Difference between revisions of "MoDisco/Components/ModelBrowser/Documentation/0.8"
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= Browser =
= Browser =
Revision as of 10:46, 6 September 2010
|Mailing List • Forums|
|Browse Source • Project Set File|
- 1 Browser
- 2 Customization
The browser surface is separated in two panes. The left one displays a list of meta-classes, and the right one shows instances of the selected meta-class (that is, model elements).
At the top of each pane, a toolbar allows you to quickly change display options relative to that pane.
You can follow links between model elements by expanding the links tree nodes. Links appear for associations, aggregations and the EMF container. The tree representing the model is infinite.
An icon indicates the link type, and the number of instances under the link is displayed in parentheses.
|bidirectional aggregation link|
|unidirectional aggregation link|
|bidirectional inverse aggregation link|
|link to the EMF container of the element (eContainer); this link is not defined in the metamodel|
The source of the link is always its parent in the tree, and the targets are its children.
The Types panel displays all the meta-classes of the opened model, with the number of instances for each meta-class. When you click on a meta-class, its instances are displayed in the Instances panel. Multi-selection of meta-classes is also supported.
Right-click on a model element and select "Browse" to select the meta-class of this element in the Types panel and display this model element amongst its siblings of the same type. You can also press Enter while an element is selected to trigger this action.
When you navigate from one meta-class to another, or when you browse an instance, you can then go back and forth in navigation history by using the left and right arrows in the toolbar (or the Alt+Left, Alt+Right shortcuts).
Type some text in the search bar and type Enter to filter the currently displayed instances by name. Press Escape to restore the view. Only instances of the currently selected meta-class are filtered.
Attributes of the selected element are displayed in the Properties view. To show this view, double-click on a model element or right-click and select Show Properties View.
You can also display attributes directly in the model tree by activating the "Show Attributes" option in the right toolbar.
The font size can easily be changed by the click of a button in the main toolbar.
The first button makes the font larger, the second one smaller, and the third one restores the default font size. The base font is configurable in Eclipse preferences.
The MoDisco Model Browser can be customized through the use of customization files.
A browser customization is a file contained in a MoDisco project inside your Eclipse Workspace, that has the uiCustom file extension. It can also be packaged inside a plug-in for distribution.
Browser customizations are useful to modify the appearance of any element from its associated metamodel when shown in the Model Browser.
For example, you could specify that all instances of a certain metaclass that have an attribute set to a given value should be displayed in bold with a specific icon.
How it works
Each customizable feature (color, boldness, text font, label, visibility, etc.) can have a default value and a list of conditional values, each one predicated by a query. The chosen value will be the one corresponding to the first condition that evaluated to "true", or the default value if all conditions were false or none was defined.
Furthermore, if no default value is provided for a feature, then a default default value will be used, which corresponds to the default behavior of the Model Browser. For example, if the "icon" feature is not customized, then the icon will be given by the "icon provider" extension point or a registered EMF adapter factory. If neither returned an icon, then a generated icon will be used.
Each value can itself be either a static value (a constant) or a value computed by a query.
Creating a customization
To create a new Browser customization, select a MoDisco project and click on New > Other.... Then select MoDisco > Browser Customization in the wizard. Give a name to the customization file, select the metamodel to which the customization will apply, and optionally choose which query sets will be available to the customization.
Editing a customization
To edit a customization, open its uiCustom file in Eclipse:
The Types section presents a tree of metaclasses from the customized metamodel, each one containing its attributes and references. It is similar to the metaclass pane in the MoDisco Model Browser.
When you select a metaclass, attribute or reference in the Types section, its customizable features are shown in the Customizations section.
The right side of the editor presents a list of buttons used for modifying the customizations shown in the Customizations section.
Editing a default value
To edit the default value of a feature, click on the feature in the Customizations section, and then click on the Edit feature value... button. Alternatively, you can double-click on the feature.
This opens a dialog where you can choose the value:
You can choose between:
- Default value : remove the customization on the feature's default value
- Static value : set the default value as a constant (which can be a boolean, a color, a font name, etc.)
- Value computed by a query : the default value of the feature will be dynamically computed at runtime by the query you select
Editing a conditional value
To add a conditional value to a feature, click on the feature in the Customizations section, then click on the Add... button. You will be presented with the following dialog:
As for default values, you can choose (in the right pane) between either a static value or a query which will yield the value at runtime.
In addition, you must select a query in the left pane that specifies the condition. This query must have a boolean return type, that will determine at runtime whether the value will be chosen or not.
Once you have added a condition, you can then use the Edit... button to change it, the Remove button to remove it, and the Up and Down buttons to reorder the conditions.
What can be customized?
|Is Visible||Whether to display the element|
|Label||The text that appears for this element|
|Text Font Name||The font used to display the label|
|Text Color||The color of the Label|
|Background Color||The background color of the Label|
|Type Icon||A 16x16 image to display as icon for this element|
|Is Bold||Whether to display the label in bold|
|Is Italic||Whether to display the label in italic|
|Is Underlined||Whether to underline the label|
|Is Struckthrough||Whether to strike through the label|
|Hide Metaclass Name||Whether to display the metaclass of each element as a prefix of its label ("[Metaclass]")|
|Visible In Types Panel||Whether the metaclass is visible in the "Types" panel|
|Overlay Icon||A 8x8 image to display over the type icon (for Facets only)|
|Collapse Link||Hide the tree node corresponding to the reference. If true the model elements are directly contained by the parent model element. If false the model elements are contained by a link node which is itself contained by the parent model element.|
Expected queries return types
The queries are expected to return a value of the right type for the feature they customize:
| Bold, Italic, Struck-through,
Underlined, Visible, Hide Metaclass Name
||The value can depend on attributes of the model element|
|Text Color, Background Color||String||"(255,128,128)"||Encoded as (red, green, blue) with integer intensity values in the interval [0,255]|
|Icon||String||"/MyModiscoProject/icons/myIcon.gif"||A path to a resource relative to the Workspace root, or in an installed plug-in (the first segment is then the plug-in name)|
|Label||String||"MyClass (public, final) [proxy]"||Typically, the query can add information about attributes or references on the model element|
How to customize a Facet
A facet is a kind of meta-class (EClass) and a facet set a kind of meta-model (EPackage). The facet sets are represented in the meta-model list by their nsURI. To customize a facet set you just have to create a customization pointing to its nsURI.