Interface IPageLayout


public interface IPageLayout
A page layout defines the initial layout for a perspective within a page in a workbench window.

This interface is not intended to be implemented by clients.

When a perspective is opened, it creates a new page layout with a single editor area. This layout is then passed to the perspective factory (implementation of IPerspectiveFactory.createInitialLayout(IPageLayout)) where additional views and other content can be added, using the existing editor area as the initial point of reference.

In some cases, multiple instances of a particular view may need to be added to the same layout. These are disambiguated using a secondary id. In layout methods taking a view id, the id can have the compound form: primaryId [':' secondaryId]. If a secondary id is given, the view must allow multiple instances by having specified allowMultiple="true" in its extension. View placeholders may also have a secondary id.

Wildcards are permitted in placeholder ids (but not regular view ids). '*' matches any substring, '?' matches any single character. Wildcards can be specified for the primary id, the secondary id, or both. For example, the placeholder "someView:*" will match any occurrence of the view that has primary id "someView" and that also has some non-null secondary id. Note that this placeholder will not match the view if it has no secondary id, since the compound id in this case is simply "someView".

Example of populating a layout with standard workbench views:

 IPageLayout layout = ...
 // Get the editor area.
 String editorArea = layout.getEditorArea();

 // Top left: Project Explorer view and Bookmarks view placeholder
 IFolderLayout topLeft = layout.createFolder("topLeft", IPageLayout.LEFT, 0.25f,
    editorArea);
 topLeft.addView(IPageLayout.ID_PROJECT_EXPLORER);
 topLeft.addPlaceholder(IPageLayout.ID_BOOKMARKS);

 // Bottom left: Outline view and Property Sheet view
 IFolderLayout bottomLeft = layout.createFolder("bottomLeft", IPageLayout.BOTTOM, 0.50f,
           "topLeft");
 bottomLeft.addView(IPageLayout.ID_OUTLINE);
 bottomLeft.addView(IPageLayout.ID_PROP_SHEET);

 // Bottom right: Task List view
 layout.addView(IPageLayout.ID_TASK_LIST, IPageLayout.BOTTOM, 0.66f, editorArea);
 
Restriction:
This interface is not intended to be implemented by clients.
  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final int
    Relationship constant indicating a part should be placed below its relative.
    static final float
    Deprecated.
    discontinued support for fast views
    static final float
    The default view ratio width for regular (non-fast) views.
    static final String
    The view id for the workbench's Bookmark Navigator standard component.
    static final String
    The part id for the workbench's editor area.
    static final String
    The view id for the workbench's Minimap standard component.
    static final String
    Id of the navigate action set.
    static final String
    The view id for the workbench's Content Outline standard component.
    static final String
    The view id for the workbench's Problems View standard component.
    static final String
    The view id for the workbench's Progress View standard component.
    static final String
    The view id for the Project Explorer.
    static final String
    The view id for the workbench's Property Sheet standard component.
    static final String
    Deprecated.
    this has been replaced by the Common Navigator Framework as of release 3.5.
    static final String
    The view id for the workbench's Task List standard component.
    static final float
    A variable used to represent invalid ratios.
    static final int
    Relationship constant indicating a part should be placed to the left of its relative.
    static final float
    A variable used to represent a ratio which has not been specified.
    static final float
    Maximum acceptable ratio value when adding a view
    static final float
    Minimum acceptable ratio value when adding a view
    static final int
    Relationship constant indicating a part should be placed to the right of its relative.
    static final int
    Relationship constant indicating a part should be placed above its relative.
  • Method Summary

    Modifier and Type
    Method
    Description
    void
    addActionSet(String actionSetId)
    Adds an action set with the given id to this page layout.
    void
    Deprecated.
    discontinued support for fast views
    void
    addFastView(String viewId, float ratio)
    Deprecated.
    discontinued support for fast views
    void
    Adds a new wizard shortcut to the page layout.
    void
    Adds a perspective shortcut to the page layout.
    void
    addPlaceholder(String viewId, int relationship, float ratio, String refId)
    Adds a view placeholder to this page layout.
    void
    Adds an item to the Show In prompter.
    void
    Adds a show view shortcut to the page layout.
    void
    addStandaloneView(String viewId, boolean showTitle, int relationship, float ratio, String refId)
    Adds a standalone view with the given compound id to this page layout.
    void
    addStandaloneViewPlaceholder(String viewId, int relationship, float ratio, String refId, boolean showTitle)
    Adds a standalone view placeholder to this page layout.
    void
    addView(String viewId, int relationship, float ratio, String refId)
    Adds a view with the given compound id to this page layout.
    createFolder(String folderId, int relationship, float ratio, String refId)
    Creates and adds a new folder with the given id to this page layout.
    createPlaceholderFolder(String folderId, int relationship, float ratio, String refId)
    Creates and adds a placeholder for a new folder with the given id to this page layout.
    Returns the perspective descriptor for the perspective being layed out.
    Returns the special identifier for the editor area in this page layout.
    int
    Deprecated.
    this always returns -1 as of Eclipse 2.1
    Returns the folder layout for the view or placeholder with the given compound id in this page layout.
    Returns the layout for the view or placeholder with the given compound id in this page layout.
    boolean
    Returns whether the page's layout will show the editor area.
    boolean
    Returns true if this layout is fixed, false if not.
    void
    setEditorAreaVisible(boolean showEditorArea)
    Show or hide the editor area for the page's layout.
    void
    setEditorReuseThreshold(int openEditors)
    Deprecated.
    this method has no effect, as of Eclipse 2.1
    void
    setFixed(boolean isFixed)
    Sets whether this layout is fixed.
  • Field Details

    • ID_EDITOR_AREA

      static final String ID_EDITOR_AREA
      The part id for the workbench's editor area. This may only be used as a reference part for view addition.
      See Also:
    • ID_RES_NAV

      @Deprecated static final String ID_RES_NAV
      Deprecated.
      this has been replaced by the Common Navigator Framework as of release 3.5.
      The view id for the workbench's Resource Navigator standard component.
      See Also:
    • ID_PROJECT_EXPLORER

      static final String ID_PROJECT_EXPLORER
      The view id for the Project Explorer.
      Since:
      3.5
      See Also:
    • ID_PROP_SHEET

      static final String ID_PROP_SHEET
      The view id for the workbench's Property Sheet standard component.
      See Also:
    • ID_OUTLINE

      static final String ID_OUTLINE
      The view id for the workbench's Content Outline standard component.
      See Also:
    • ID_BOOKMARKS

      static final String ID_BOOKMARKS
      The view id for the workbench's Bookmark Navigator standard component.
      See Also:
    • ID_PROBLEM_VIEW

      static final String ID_PROBLEM_VIEW
      The view id for the workbench's Problems View standard component.
      Since:
      3.0
      See Also:
    • ID_PROGRESS_VIEW

      static final String ID_PROGRESS_VIEW
      The view id for the workbench's Progress View standard component.
      Since:
      3.2
      See Also:
    • ID_TASK_LIST

      static final String ID_TASK_LIST
      The view id for the workbench's Task List standard component.
      See Also:
    • ID_MINIMAP_VIEW

      static final String ID_MINIMAP_VIEW
      The view id for the workbench's Minimap standard component.
      Since:
      3.117
      See Also:
    • ID_NAVIGATE_ACTION_SET

      static final String ID_NAVIGATE_ACTION_SET
      Id of the navigate action set. (value "org.eclipse.ui.NavigateActionSet")
      Since:
      2.1
      See Also:
    • LEFT

      static final int LEFT
      Relationship constant indicating a part should be placed to the left of its relative.
      See Also:
    • TOP

      static final int TOP
      Relationship constant indicating a part should be placed above its relative.
      See Also:
    • BOTTOM

      static final int BOTTOM
      Relationship constant indicating a part should be placed below its relative.
      See Also:
    • RATIO_MIN

      static final float RATIO_MIN
      Minimum acceptable ratio value when adding a view
      Since:
      2.0
      See Also:
    • RATIO_MAX

      static final float RATIO_MAX
      Maximum acceptable ratio value when adding a view
      Since:
      2.0
      See Also:
    • DEFAULT_FASTVIEW_RATIO

      @Deprecated static final float DEFAULT_FASTVIEW_RATIO
      Deprecated.
      discontinued support for fast views
      The default fast view ratio width.
      Since:
      2.0
      See Also:
    • DEFAULT_VIEW_RATIO

      static final float DEFAULT_VIEW_RATIO
      The default view ratio width for regular (non-fast) views.
      Since:
      2.0
      See Also:
    • INVALID_RATIO

      static final float INVALID_RATIO
      A variable used to represent invalid ratios.
      Since:
      2.0
      See Also:
    • NULL_RATIO

      static final float NULL_RATIO
      A variable used to represent a ratio which has not been specified.
      Since:
      2.0
      See Also:
  • Method Details

    • addActionSet

      void addActionSet(String actionSetId)
      Adds an action set with the given id to this page layout. The id must name an action set contributed to the workbench's extension point (named "org.eclipse.ui.actionSet").
      Parameters:
      actionSetId - the action set id
    • addFastView

      @Deprecated void addFastView(String viewId)
      Deprecated.
      discontinued support for fast views
      Adds the view with the given compound id to the page layout as a fast view. See the IPageLayout type documentation for more details about compound ids. The primary id must name a view contributed to the workbench's view extension point (named "org.eclipse.ui.views").
      Parameters:
      viewId - the compound id of the view to be added
      Since:
      2.0
    • addFastView

      @Deprecated void addFastView(String viewId, float ratio)
      Deprecated.
      discontinued support for fast views
      Adds the view with the given compound id to the page layout as a fast view with the given width ratio. See the IPageLayout type documentation for more details about compound ids. The primary id must name a view contributed to the workbench's view extension point (named "org.eclipse.ui.views").
      Parameters:
      viewId - the compound id of the view to be added
      ratio - the percentage of the workbench the fast view will cover
      Since:
      2.0
    • addNewWizardShortcut

      void addNewWizardShortcut(String id)
      Adds a new wizard shortcut to the page layout. These are typically shown in the UI to allow rapid navigation to appropriate new wizards. For example, in the Eclipse IDE, these appear as items under the File > New menu. The id must name a new wizard extension contributed to the workbench's new wizards extension point (named "org.eclipse.ui.newWizards").
      Parameters:
      id - the wizard id
    • addPerspectiveShortcut

      void addPerspectiveShortcut(String id)
      Adds a perspective shortcut to the page layout. These are typically shown in the UI to allow rapid navigation to appropriate new wizards. For example, in the Eclipse IDE, these appear as items under the Window > Open Perspective menu. The id must name a perspective extension contributed to the workbench's perspectives extension point (named "org.eclipse.ui.perspectives").
      Parameters:
      id - the perspective id
    • addPlaceholder

      void addPlaceholder(String viewId, int relationship, float ratio, String refId)
      Adds a view placeholder to this page layout. A view placeholder is used to define the position of a view before the view appears. Initially, it is invisible; however, if the user ever opens a view whose compound id matches the placeholder, the view will appear at the same location as the placeholder. See the IPageLayout type documentation for more details about compound ids. If the placeholder contains wildcards, it remains in the layout, otherwise it is replaced by the view. If the primary id of the placeholder has no wildcards, it must refer to a view contributed to the workbench's view extension point (named "org.eclipse.ui.views").
      Parameters:
      viewId - the compound view id (wildcards allowed)
      relationship - the position relative to the reference part; one of TOP, BOTTOM, LEFT, or RIGHT
      ratio - a ratio specifying how to divide the space currently occupied by the reference part, in the range 0.05f to 0.95f. Values outside this range will be clipped to facilitate direct manipulation. For a vertical split, the part on top gets the specified ratio of the current space and the part on bottom gets the rest. Likewise, for a horizontal split, the part at left gets the specified ratio of the current space and the part at right gets the rest.
      refId - the id of the reference part; either a view id, a folder id, or the special editor area id returned by getEditorArea
    • addShowInPart

      void addShowInPart(String id)
      Adds an item to the Show In prompter. The id must name a view contributed to the workbench's view extension point (named "org.eclipse.ui.views").
      Parameters:
      id - the view id
      Since:
      2.1
    • addShowViewShortcut

      void addShowViewShortcut(String id)
      Adds a show view shortcut to the page layout. These are typically shown in the UI to allow rapid navigation to appropriate views. For example, in the Eclipse IDE, these appear as items under the Window > Show View menu. The id must name a view contributed to the workbench's views extension point (named "org.eclipse.ui.views").
      Parameters:
      id - the view id
    • addView

      void addView(String viewId, int relationship, float ratio, String refId)
      Adds a view with the given compound id to this page layout. See the IPageLayout type documentation for more details about compound ids. The primary id must name a view contributed to the workbench's view extension point (named "org.eclipse.ui.views").
      Parameters:
      viewId - the compound view id
      relationship - the position relative to the reference part; one of TOP, BOTTOM, LEFT, or RIGHT
      ratio - a ratio specifying how to divide the space currently occupied by the reference part, in the range 0.05f to 0.95f. Values outside this range will be clipped to facilitate direct manipulation. For a vertical split, the part on top gets the specified ratio of the current space and the part on bottom gets the rest. Likewise, for a horizontal split, the part at left gets the specified ratio of the current space and the part at right gets the rest.
      refId - the id of the reference part; either a view id, a folder id, or the special editor area id returned by getEditorArea
    • createFolder

      IFolderLayout createFolder(String folderId, int relationship, float ratio, String refId)
      Creates and adds a new folder with the given id to this page layout. The position and relative size of the folder is expressed relative to a reference part.
      Parameters:
      folderId - the id for the new folder. This must be unique within the layout to avoid collision with other parts.
      relationship - the position relative to the reference part; one of TOP, BOTTOM, LEFT, or RIGHT
      ratio - a ratio specifying how to divide the space currently occupied by the reference part, in the range 0.05f to 0.95f. Values outside this range will be clipped to facilitate direct manipulation. For a vertical split, the part on top gets the specified ratio of the current space and the part on bottom gets the rest. Likewise, for a horizontal split, the part at left gets the specified ratio of the current space and the part at right gets the rest.
      refId - the id of the reference part; either a view id, a folder id, or the special editor area id returned by getEditorArea
      Returns:
      the new folder
    • createPlaceholderFolder

      IPlaceholderFolderLayout createPlaceholderFolder(String folderId, int relationship, float ratio, String refId)
      Creates and adds a placeholder for a new folder with the given id to this page layout. The position and relative size of the folder is expressed relative to a reference part.
      Parameters:
      folderId - the id for the new folder. This must be unique within the layout to avoid collision with other parts.
      relationship - the position relative to the reference part; one of TOP, BOTTOM, LEFT, or RIGHT
      ratio - a ratio specifying how to divide the space currently occupied by the reference part, in the range 0.05f to 0.95f. Values outside this range will be clipped to facilitate direct manipulation. For a vertical split, the part on top gets the specified ratio of the current space and the part on bottom gets the rest. Likewise, for a horizontal split, the part at left gets the specified ratio of the current space and the part at right gets the rest.
      refId - the id of the reference part; either a view id, a folder id, or the special editor area id returned by getEditorArea
      Returns:
      a placeholder for the new folder
      Since:
      2.0
    • getEditorArea

      String getEditorArea()
      Returns the special identifier for the editor area in this page layout. The identifier for the editor area is also stored in ID_EDITOR_AREA.

      The editor area is automatically added to each layout before anything else. It should be used as the point of reference when adding views to a layout.

      Returns:
      the special id of the editor area
    • isEditorAreaVisible

      boolean isEditorAreaVisible()
      Returns whether the page's layout will show the editor area.
      Returns:
      true when editor area visible, false otherwise
    • setEditorAreaVisible

      void setEditorAreaVisible(boolean showEditorArea)
      Show or hide the editor area for the page's layout.
      Parameters:
      showEditorArea - true to show the editor area, false to hide the editor area
    • getEditorReuseThreshold

      @Deprecated int getEditorReuseThreshold()
      Deprecated.
      this always returns -1 as of Eclipse 2.1
      Returns the number of open editors before reusing editors or -1 if the preference settings should be used instead.
      Returns:
      the number of open editors before reusing editors or -1 if the preference settings should be used instead.
    • setEditorReuseThreshold

      @Deprecated void setEditorReuseThreshold(int openEditors)
      Deprecated.
      this method has no effect, as of Eclipse 2.1
      Sets the number of open editors before reusing editors. If < 0 the user preference settings will be used.
      Parameters:
      openEditors - the number of open editors
    • setFixed

      void setFixed(boolean isFixed)
      Sets whether this layout is fixed. In a fixed layout, layout parts cannot be moved or zoomed, and the initial set of views cannot be closed.
      Parameters:
      isFixed - true if this layout is fixed, false if not
      Since:
      3.0
    • isFixed

      boolean isFixed()
      Returns true if this layout is fixed, false if not. In a fixed layout, layout parts cannot be moved or zoomed, and the initial set of views cannot be closed. The default is false.
      Returns:
      true if this layout is fixed, false if not.
      Since:
      3.0
    • getViewLayout

      IViewLayout getViewLayout(String id)
      Returns the layout for the view or placeholder with the given compound id in this page layout. See the IPageLayout type documentation for more details about compound ids. Returns null if the specified view or placeholder is unknown to the layout.
      Parameters:
      id - the compound view id or placeholder
      Returns:
      the view layout, or null
      Since:
      3.0
    • addStandaloneView

      void addStandaloneView(String viewId, boolean showTitle, int relationship, float ratio, String refId)
      Adds a standalone view with the given compound id to this page layout. See the IPageLayout type documentation for more details about compound ids. A standalone view cannot be docked together with other views. A standalone view's title can optionally be hidden. If hidden, then any controls typically shown with the title (such as the close button) are also hidden. Any contributions or other content from the view itself are always shown (e.g. toolbar or view menu contributions, content description).

      The id must name a view contributed to the workbench's view extension point (named "org.eclipse.ui.views").

      Parameters:
      viewId - the compound view id
      showTitle - true to show the title and related controls, false to hide them
      relationship - the position relative to the reference part; one of TOP, BOTTOM, LEFT, or RIGHT
      ratio - a ratio specifying how to divide the space currently occupied by the reference part, in the range 0.05f to 0.95f. Values outside this range will be clipped to facilitate direct manipulation. For a vertical split, the part on top gets the specified ratio of the current space and the part on bottom gets the rest. Likewise, for a horizontal split, the part at left gets the specified ratio of the current space and the part at right gets the rest.
      refId - the id of the reference part; either a view id, a folder id, or the special editor area id returned by getEditorArea
      Since:
      3.0
    • addStandaloneViewPlaceholder

      void addStandaloneViewPlaceholder(String viewId, int relationship, float ratio, String refId, boolean showTitle)
      Adds a standalone view placeholder to this page layout. A view placeholder is used to define the position of a view before the view appears. Initially, it is invisible; however, if the user ever opens a view whose compound id matches the placeholder, the view will appear at the same location as the placeholder. See the IPageLayout type documentation for more details about compound ids. If the placeholder contains wildcards, it remains in the layout, otherwise it is replaced by the view. If the primary id of the placeholder has no wildcards, it must refer to a view contributed to the workbench's view extension point (named "org.eclipse.ui.views").
      Parameters:
      viewId - the compound view id (wildcards allowed)
      relationship - the position relative to the reference part; one of TOP, BOTTOM, LEFT, or RIGHT
      ratio - a ratio specifying how to divide the space currently occupied by the reference part, in the range 0.05f to 0.95f. Values outside this range will be clipped to facilitate direct manipulation. For a vertical split, the part on top gets the specified ratio of the current space and the part on bottom gets the rest. Likewise, for a horizontal split, the part at left gets the specified ratio of the current space and the part at right gets the rest.
      refId - the id of the reference part; either a view id, a folder id, or the special editor area id returned by getEditorArea
      showTitle - true to show the view's title, false if not
      Since:
      3.2
    • getDescriptor

      IPerspectiveDescriptor getDescriptor()
      Returns the perspective descriptor for the perspective being layed out.
      Returns:
      the perspective descriptor for the perspective being layed out
      Since:
      3.2
    • getFolderForView

      IPlaceholderFolderLayout getFolderForView(String id)
      Returns the folder layout for the view or placeholder with the given compound id in this page layout. See the IPageLayout type documentation for more details about compound ids. Returns null if the specified view or placeholder is unknown to the layout, or the placeholder was not in a folder.
      Parameters:
      id - the compound view id or placeholder. Must not be null.
      Returns:
      the folder layout, or null
      Since:
      3.3