Package org.eclipse.handly.ui.quickoutline

## Class OutlinePopup

- java.lang.Object
- - org.eclipse.jface.window.Window
  - - org.eclipse.jface.dialogs.PopupDialog
    - - org.eclipse.handly.ui.quickoutline.OutlinePopup

- All Implemented Interfaces:
    `org.eclipse.jface.window.IShellProvider`
  Direct Known Subclasses:
    `FilteringOutlinePopup`

      public abstract class OutlinePopup
      extends org.eclipse.jface.dialogs.PopupDialog

  An abstract base implementation of an outline popup.

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class | Description
    --- | --- | ---
    `protected class` | `OutlinePopup.OutlineTreeViewer` | A tree viewer for the `OutlinePopup`.

    - ### Nested classes/interfaces inherited from class org.eclipse.jface.window.Window

      `org.eclipse.jface.window.Window.IExceptionHandler`

  - ### Field Summary

    - ### Fields inherited from class org.eclipse.jface.dialogs.PopupDialog

      `HOVER_SHELLSTYLE, INFOPOPUP_SHELLSTYLE, INFOPOPUPRESIZE_SHELLSTYLE, POPUP_HORIZONTALSPACING, POPUP_IMG_MENU, POPUP_IMG_MENU_DISABLED, POPUP_MARGINHEIGHT, POPUP_MARGINWIDTH, POPUP_VERTICALSPACING`

    - ### Fields inherited from class org.eclipse.jface.window.Window

      `CANCEL, OK, resizeHasOccurred`

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `OutlinePopup()` | Creates a new outline popup.

  - ### Method Summary

    All Methods Instance Methods Abstract Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `protected void` | `changeOutlineMode()` | Changes the mode of this outline popup.
    `protected java.lang.Object` | `computeInitialSelection()` | Computes the element to be selected initially in the outline popup's tree viewer.
    `protected abstract java.lang.Object` | `computeInput()` | Computes the input element for the outline popup's tree viewer.
    `protected org.eclipse.swt.widgets.Control` | `createDialogArea​(org.eclipse.swt.widgets.Composite parent)` |
    `protected org.eclipse.jface.viewers.TreeViewer` | `createTreeViewer​(org.eclipse.swt.widgets.Composite parent)` | Creates a tree viewer for this outline popup.
    `protected abstract org.eclipse.jface.viewers.ITreeContentProvider` | `getContentProvider()` | Returns the content provider that is to be used by the outline popup's tree viewer.
    `protected abstract java.lang.Object` | `getCorrespondingElement​(org.eclipse.jface.viewers.ISelection hostSelection)` | Returns the outline element corresponding to the given host selection.
    `protected org.eclipse.swt.graphics.Point` | `getDefaultLocation​(org.eclipse.swt.graphics.Point initialSize)` |
    `protected org.eclipse.jface.dialogs.IDialogSettings` | `getDialogSettings()` |
    `protected org.eclipse.swt.widgets.Control` | `getFocusControl()` |
    `protected IOutlinePopupHost` | `getHost()` | Returns the host of this outline popup.
    `protected java.lang.Object` | `getInitialSelection()` | Returns the initially selected outline element.
    `protected org.eclipse.swt.events.KeyListener` | `getInvokingKeyListener()` | Returns the invoking key listener.
    `protected org.eclipse.jface.bindings.keys.KeyStroke` | `getInvokingKeyStroke()` | Returns the keystroke for invoking this outline popup.
    `protected abstract org.eclipse.jface.viewers.IBaseLabelProvider` | `getLabelProvider()` | Returns the label provider that is to be used by the outline popup's tree viewer.
    `protected java.lang.Object` | `getSelectedElement()` | Returns the currently selected outline element.
    `protected org.eclipse.jface.viewers.TreeViewer` | `getTreeViewer()` | Returns the tree viewer of this outline popup.
    `protected void` | `gotoSelectedElement()` | Attempts to reveal the currently selected outline element in the outline popup's host.
    `void` | `init​(IOutlinePopupHost host, org.eclipse.jface.bindings.keys.KeyStroke invokingKeyStroke)` | Initializes this outline popup with the given host and, optionally, invoking keystroke.
    `protected void` | `initDecorationContext​(org.eclipse.jface.viewers.DecorationContext context)` | Hook to initialize decoration context.
    `protected boolean` | `isAutoExpandable​(org.eclipse.swt.widgets.TreeItem item)` | Returns whether the given tree item is auto-expandable.
    `protected abstract boolean` | `revealInHost​(java.lang.Object outlineElement)` | Attempts to reveal the given outline element in the outline popup's host.
    `protected void` | `setTabOrder​(org.eclipse.swt.widgets.Composite composite)` |
    `protected boolean` | `shouldUseHashlookup()` | Returns whether the outline popup's tree viewer should use hash lookup.
    `protected void` | `updateInfoText()` | Updates the text to be shown in the popup's info area.

    - ### Methods inherited from class org.eclipse.jface.dialogs.PopupDialog

      `adjustBounds, applyBackgroundColor, applyForegroundColor, close, configureShell, createContents, createInfoTextArea, createTitleControl, createTitleMenuArea, fillDialogMenu, getBackground, getBackgroundColorExclusions, getDefaultSize, getForeground, getForegroundColorExclusions, getInitialLocation, getInitialSize, getPersistBounds, getPersistLocation, getPersistSize, hasInfoArea, hasTitleArea, open, saveDialogBounds, setInfoText, setTitleText, showDialogMenu`

    - ### Methods inherited from class org.eclipse.jface.window.Window

      `canHandleShellCloseEvent, constrainShellSize, create, createShell, getConstrainedShellBounds, getContents, getDefaultImage, getDefaultImages, getDefaultOrientation, getLayout, getParentShell, getReturnCode, getShell, getShellListener, getShellStyle, getWindowManager, handleFontChange, handleShellCloseEvent, initializeBounds, setBlockOnOpen, setDefaultImage, setDefaultImages, setDefaultModalParent, setDefaultOrientation, setExceptionHandler, setParentShell, setReturnCode, setShellStyle, setWindowManager`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### OutlinePopup

          public OutlinePopup()

      Creates a new outline popup.

      Note: The parent shell will be set when this outline popup is initialized with its host.

      See Also:
        `init(IOutlinePopupHost, KeyStroke)`

  - ### Method Detail

    - #### init

          public void init​(IOutlinePopupHost host,
                           org.eclipse.jface.bindings.keys.KeyStroke invokingKeyStroke)

      Initializes this outline popup with the given host and, optionally, invoking keystroke. This method must be called by clients before attempting to `open` the outline popup.

      This method may be extended by subclasses. Subclasses must call the superclass implementation.

      `OutlinePopup` implementation of this method sets the parent shell to the shell of the SWT control of the given host, creates all controls of the outline popup, including the `tree viewer`, initializes the tree viewer with the `content`- and `label` providers as well as the `input`, and sets the `initial selection` in the tree viewer and the `text` in the popup's info area.

      Parameters:
        `host` - the host of this outline popup (not `null`)
        `invokingKeyStroke` - the keystroke for invoking this outline popup, or `null` if none

    - #### getHost

          protected final IOutlinePopupHost getHost()

      Returns the host of this outline popup.
      Returns:
        the host of this outline popup, or `null` if it has not been set yet

    - #### getInvokingKeyStroke

          protected final org.eclipse.jface.bindings.keys.KeyStroke getInvokingKeyStroke()

      Returns the keystroke for invoking this outline popup.
      Returns:
        the keystroke for invoking this outline popup, or `null` if none

    - #### getTreeViewer

          protected final org.eclipse.jface.viewers.TreeViewer getTreeViewer()

      Returns the tree viewer of this outline popup.
      Returns:
        the tree viewer of this outline popup, or `null` if it has not been created yet

    - #### getInitialSelection

          protected final java.lang.Object getInitialSelection()

      Returns the initially selected outline element.
      Returns:
        the initially selected outline element, or `null` if none

    - #### getSelectedElement

          protected final java.lang.Object getSelectedElement()

      Returns the currently selected outline element.
      Returns:
        the currently selected outline element, or `null` if none

    - #### getFocusControl

          protected org.eclipse.swt.widgets.Control getFocusControl()

      Overrides:
        `getFocusControl` in class `org.eclipse.jface.dialogs.PopupDialog`

    - #### setTabOrder

          protected void setTabOrder​(org.eclipse.swt.widgets.Composite composite)

      Overrides:
        `setTabOrder` in class `org.eclipse.jface.dialogs.PopupDialog`

    - #### getDefaultLocation

          protected org.eclipse.swt.graphics.Point getDefaultLocation​(org.eclipse.swt.graphics.Point initialSize)

      Overrides:
        `getDefaultLocation` in class `org.eclipse.jface.dialogs.PopupDialog`

    - #### getDialogSettings

          protected org.eclipse.jface.dialogs.IDialogSettings getDialogSettings()

      Overrides:
        `getDialogSettings` in class `org.eclipse.jface.dialogs.PopupDialog`

    - #### createDialogArea

          protected org.eclipse.swt.widgets.Control createDialogArea​(org.eclipse.swt.widgets.Composite parent)

      Overrides:
        `createDialogArea` in class `org.eclipse.jface.dialogs.PopupDialog`

    - #### createTreeViewer

          protected org.eclipse.jface.viewers.TreeViewer createTreeViewer​(org.eclipse.swt.widgets.Composite parent)

      Creates a tree viewer for this outline popup. The viewer has no input, no content provider, a default label provider, no sorter, and no filters. This method is called once, when the popup's control is created.

      This implementation returns a new instance of `OutlinePopup.OutlineTreeViewer`.

      Parameters:
        `parent` - the parent composite (never `null`)
      Returns:
        the created tree viewer (not `null`)

    - #### updateInfoText

          protected void updateInfoText()

      Updates the text to be shown in the popup's info area.

      This implementation sets a default text. Subclasses may override.

    - #### gotoSelectedElement

          protected void gotoSelectedElement()

      Attempts to reveal the currently selected outline element in the outline popup's host. If successful, closes this outline popup.

      This implementation uses `revealInHost(Object)` for revealing the currently selected outline element.

    - #### changeOutlineMode

          protected void changeOutlineMode()

      Changes the mode of this outline popup. This method is called when the invoking keystroke is pressed.

      Default implementation does nothing. Subclasses may override.

    - #### shouldUseHashlookup

          protected boolean shouldUseHashlookup()

      Returns whether the outline popup's tree viewer should use hash lookup. This method is called once, when the popup's control is created.

      Default implementation returns `true`. Subclasses may override.

      See Also:
        `StructuredViewer.setUseHashlookup(boolean)`

    - #### getContentProvider

          protected abstract org.eclipse.jface.viewers.ITreeContentProvider getContentProvider()

      Returns the content provider that is to be used by the outline popup's tree viewer. This method is called once, when the popup's control is created.
      Returns:
        the content provider (not `null`)

    - #### getLabelProvider

          protected abstract org.eclipse.jface.viewers.IBaseLabelProvider getLabelProvider()

      Returns the label provider that is to be used by the outline popup's tree viewer. This method is called once, when the popup's control is created.
      Returns:
        the label provider (not `null`)

    - #### computeInput

          protected abstract java.lang.Object computeInput()

      Computes the input element for the outline popup's tree viewer. This method is called once, when the popup's control is created.
      Returns:
        the input element (may be `null`)

    - #### computeInitialSelection

          protected java.lang.Object computeInitialSelection()

      Computes the element to be selected initially in the outline popup's tree viewer. This method is called once, when the popup's control is created.

      This implementation obtains the current selection in the outline popup's host and delegates to `getCorrespondingElement(ISelection)` if the selection is not `null` or empty.

      Returns:
        the element to be selected initially in this outline popup, or `null` if none

    - #### getCorrespondingElement

          protected abstract java.lang.Object getCorrespondingElement​(org.eclipse.jface.viewers.ISelection hostSelection)

      Returns the outline element corresponding to the given host selection.
      Parameters:
        `hostSelection` - the host selection (never `null`, never empty)
      Returns:
        the outline element corresponding to the host selection, or `null` if there is no such element

    - #### revealInHost

          protected abstract boolean revealInHost​(java.lang.Object outlineElement)

      Attempts to reveal the given outline element in the outline popup's host.
      Parameters:
        `outlineElement` - the outline element (never `null`)
      Returns:
        `true` if the element was successfully revealed; `false` otherwise

    - #### isAutoExpandable

          protected boolean isAutoExpandable​(org.eclipse.swt.widgets.TreeItem item)

      Returns whether the given tree item is auto-expandable. This method should be consulted by the tree viewer's `expandXXX` methods. If it returns `false`, the item is to be collapsed rather than expanded.

      Default implementation returns `true` for the root item and `false` for all other items. Subclasses may override.

      Parameters:
        `item` - the tree item (never `null`)
      Returns:
        `true` if the given item is auto-expandable; `false` otherwise

    - #### initDecorationContext

          protected void initDecorationContext​(org.eclipse.jface.viewers.DecorationContext context)

      Hook to initialize decoration context. Subclasses may extend.

      If this outline popup implements `IContentAdapterProvider`, default implementation registers this outline popup in the given context under the name `IContentAdapterProvider.class.getName()`.

      Parameters:
        `context` - the decoration context (never `null`)

    - #### getInvokingKeyListener

          protected final org.eclipse.swt.events.KeyListener getInvokingKeyListener()

      Returns the invoking key listener. When the `invoking key` is pressed, this listener `changes` the mode of the outline popup and `updates` the text in the popup's info area.
      Returns:
        the invoking key listener (never `null`)