Class AbstractTableViewer

    • Constructor Detail

      • AbstractTableViewer

        public AbstractTableViewer()
        Create the new viewer for table like widgets
    • Method Detail

      • hookControl

        protected void hookControl​(Control control)
        Description copied from class: ContentViewer
        Adds event listener hooks to the given control.

        All subclasses must call this method when their control is first established.

        The ContentViewer implementation of this method hooks dispose events for the given control. Subclasses may override if they need to add other control hooks; however, super.hookControl must be invoked.

        Overrides:
        hookControl in class ColumnViewer
        Parameters:
        control - the control
      • handleDispose

        protected void handleDispose​(DisposeEvent event)
        Description copied from class: ContentViewer
        Handles a dispose event on this viewer's control.

        The ContentViewer implementation of this method disposes of this viewer's label provider and content provider (if it has one). Subclasses should override this method to perform any additional cleanup of resources; however, overriding methods must invoke super.handleDispose.

        Overrides:
        handleDispose in class ColumnViewer
        Parameters:
        event - a dispose event
      • add

        public void add​(Object[] elements)
        Adds the given elements to this table viewer. If this viewer does not have a sorter, the elements are added at the end in the order given; otherwise the elements are inserted at appropriate positions.

        This method should be called (by the content provider) when elements have been added to the model, in order to cause the viewer to accurately reflect the model. This method only affects the viewer, not the model.

        Parameters:
        elements - the elements to add
      • internalCreateNewRowPart

        protected abstract ViewerRow internalCreateNewRowPart​(int style,
                                                              int rowIndex)
        Create a new row. Callers can only use the returned object locally and before making the next call on the viewer since it may be re-used for subsequent method calls.
        Parameters:
        style - the style for the new row
        rowIndex - the index of the row or -1 if the row is appended at the end
        Returns:
        the newly created row
      • add

        public void add​(Object element)
        Adds the given element to this table viewer. If this viewer does not have a sorter, the element is added at the end; otherwise the element is inserted at the appropriate position.

        This method should be called (by the content provider) when a single element has been added to the model, in order to cause the viewer to accurately reflect the model. This method only affects the viewer, not the model. Note that there is another method for efficiently processing the simultaneous addition of multiple elements.

        Parameters:
        element - the element to add
      • doFindInputItem

        protected Widget doFindInputItem​(Object element)
        Description copied from class: StructuredViewer
        Returns the widget in this viewer's control which represents the given element if it is the viewer's input.

        This method is internal to the framework; subclassers should not call this method.

        Specified by:
        doFindInputItem in class StructuredViewer
        Returns:
        the corresponding widget, or null if none
      • doFindItem

        protected Widget doFindItem​(Object element)
        Description copied from class: StructuredViewer
        Returns the widget in this viewer's control which represent the given element. This method searches all the children of the input element.

        This method is internal to the framework; subclassers should not call this method.

        Specified by:
        doFindItem in class StructuredViewer
        Returns:
        the corresponding widget, or null if none
      • doUpdateItem

        protected void doUpdateItem​(Widget widget,
                                    Object element,
                                    boolean fullMap)
        Description copied from class: StructuredViewer
        Copies the attributes of the given element into the given SWT item. The element map is updated according to the value of fullMap. If fullMap is true then the current mapping from element to widgets is removed and the new mapping is added. If full map is false then only the new map gets installed. Installing only the new map is necessary in cases where only the order of elements changes but not the set of elements.

        This method is internal to the framework; subclassers should not call this method.

        Specified by:
        doUpdateItem in class StructuredViewer
        element - element
        fullMap - true if mappings are added and removed, and false if only the new map gets installed
      • getColumnViewerOwner

        protected Widget getColumnViewerOwner​(int columnIndex)
        Description copied from class: ColumnViewer
        Returns the column widget at the given column index.
        Specified by:
        getColumnViewerOwner in class ColumnViewer
        Parameters:
        columnIndex - the column index
        Returns:
        Widget the column widget
      • getElementAt

        public Object getElementAt​(int index)
        Returns the element with the given index from this table viewer. Returns null if the index is out of range.

        This method is internal to the framework.

        Parameters:
        index - the zero-based index
        Returns:
        the element at the given index, or null if the index is out of range
      • getLabelProvider

        public IBaseLabelProvider getLabelProvider()
        The table viewer implementation of this Viewer framework method returns the label provider, which in the case of table viewers will be an instance of either ITableLabelProvider or ILabelProvider. If it is an ITableLabelProvider, then it provides a separate label text and image for each column. If it is an ILabelProvider, then it provides only the label text and image for the first column, and any remaining columns are blank.
        Overrides:
        getLabelProvider in class ContentViewer
        Returns:
        a label provider
      • indexForElement

        protected int indexForElement​(Object element)
        Parameters:
        element - the element to insert
        Returns:
        the index where the item should be inserted.
      • inputChanged

        protected void inputChanged​(Object input,
                                    Object oldInput)
        Description copied from class: Viewer
        Internal hook method called when the input to this viewer is initially set or subsequently changed.

        The default implementation does nothing. Subclassers may override this method to do something when a viewer's input is set. A typical use is populate the viewer.

        Overrides:
        inputChanged in class Viewer
        Parameters:
        input - the new input of this viewer, or null if none
        oldInput - the old input element or null if there was previously no input
      • insert

        public void insert​(Object element,
                           int position)
        Inserts the given element into this table viewer at the given position. If this viewer has a sorter, the position is ignored and the element is inserted at the correct position in the sort order.

        This method should be called (by the content provider) when elements have been added to the model, in order to cause the viewer to accurately reflect the model. This method only affects the viewer, not the model.

        Parameters:
        element - the element
        position - a 0-based position relative to the model, or -1 to indicate the last position
      • internalRefresh

        protected void internalRefresh​(Object element,
                                       boolean updateLabels)
        Description copied from class: StructuredViewer
        Refreshes this viewer starting at the given element. Labels are updated as described in refresh(boolean updateLabels).

        The default implementation simply calls internalRefresh(element), ignoring updateLabels.

        If this method is overridden to do the actual refresh, then internalRefresh(Object element) should simply call internalRefresh(element, true).

        Overrides:
        internalRefresh in class StructuredViewer
        Parameters:
        element - the element
        updateLabels - true to update labels for existing elements, false to only update labels as needed, assuming that labels for existing elements are unchanged.
      • remove

        public void remove​(Object[] elements)
        Removes the given elements from this table viewer. The selection is updated if required.

        This method should be called (by the content provider) when elements have been removed from the model, in order to cause the viewer to accurately reflect the model. This method only affects the viewer, not the model.

        Parameters:
        elements - the elements to remove
      • remove

        public void remove​(Object element)
        Removes the given element from this table viewer. The selection is updated if necessary.

        This method should be called (by the content provider) when a single element has been removed from the model, in order to cause the viewer to accurately reflect the model. This method only affects the viewer, not the model. Note that there is another method for efficiently processing the simultaneous removal of multiple elements.

        NOTE: removing an object from a virtual table will decrement the itemCount.
        Parameters:
        element - the element
      • reveal

        public void reveal​(Object element)
        Description copied from class: StructuredViewer
        Ensures that the given element is visible, scrolling the viewer if necessary. The selection is unchanged.
        Specified by:
        reveal in class StructuredViewer
        Parameters:
        element - the element to reveal
      • setSelectionToWidget

        protected void setSelectionToWidget​(List list,
                                            boolean reveal)
        Description copied from class: StructuredViewer
        Parlays the given list of selected elements into selections on this viewer's control.

        Subclasses should override to set their selection based on the given list of elements.

        Specified by:
        setSelectionToWidget in class StructuredViewer
        Parameters:
        list - list of selected elements (element type: Object) or null if the selection is to be cleared
        reveal - true if the selection is to be made visible, and false otherwise
      • setItemCount

        public void setItemCount​(int count)
        Set the item count of the receiver.
        Parameters:
        count - the new table size.
        Since:
        3.1
      • replace

        public void replace​(Object element,
                            int index)
        Replace the element at the given index with the given element. This method will not call the content provider to verify. Note that this method will materialize a TableItem the given index..
        Parameters:
        element -
        index -
        Since:
        3.1
        See Also:
        ILazyContentProvider
      • clear

        public void clear​(int index)
        Clear the table item at the specified index
        Parameters:
        index - the index of the table item to be cleared
        Since:
        3.1
      • getRawChildren

        protected Object[] getRawChildren​(Object parent)
        Description copied from class: StructuredViewer
        Returns the children of the given parent without sorting and filtering them. The resulting array must not be modified, as it may come directly from the model's internal state.

        Returns an empty array if the given parent is null.

        Overrides:
        getRawChildren in class ColumnViewer
        Parameters:
        parent - the parent element
        Returns:
        the child elements
      • doIndexOf

        protected abstract int doIndexOf​(Item item)
        Searches the receiver's list starting at the first item (index 0) until an item is found that is equal to the argument, and returns the index of that item. If no item is found, returns -1.
        Parameters:
        item - the search item
        Returns:
        the index of the item
        Since:
        3.3
      • doGetItemCount

        protected abstract int doGetItemCount()
        Returns the number of items contained in the receiver.
        Returns:
        the number of items
        Since:
        3.3
      • doSetItemCount

        protected abstract void doSetItemCount​(int count)
        Sets the number of items contained in the receiver.
        Parameters:
        count - the number of items
        Since:
        3.3
      • doGetItems

        protected abstract Item[] doGetItems()
        Returns a (possibly empty) array of TableItems which are the items in the receiver.
        Returns:
        the items in the receiver
        Since:
        3.3
      • doGetColumn

        protected abstract Widget doGetColumn​(int index)
        Returns the column at the given, zero-relative index in the receiver. Throws an exception if the index is out of range. Columns are returned in the order that they were created. If no TableColumns were created by the programmer, this method will throw ERROR_INVALID_RANGE despite the fact that a single column of data may be visible in the table. This occurs when the programmer uses the table like a list, adding items but never creating a column.
        Parameters:
        index - the index of the column to return
        Returns:
        the column at the given index
        Throws:
        IllegalArgumentException - - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)
        Since:
        3.3
      • doGetItem

        protected abstract Item doGetItem​(int index)
        Returns the item at the given, zero-relative index in the receiver. Throws an exception if the index is out of range.
        Parameters:
        index - the index of the item to return
        Returns:
        the item at the given index
        Throws:
        IllegalArgumentException - - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)
        Since:
        3.3
      • doGetSelection

        protected abstract Item[] doGetSelection()
        Returns an array of Item that are currently selected in the receiver. The order of the items is unspecified. An empty array indicates that no items are selected.
        Returns:
        an array representing the selection
        Since:
        3.3
      • doGetSelectionIndices

        protected abstract int[] doGetSelectionIndices()
        Returns the zero-relative indices of the items which are currently selected in the receiver. The order of the indices is unspecified. The array is empty if no items are selected.
        Returns:
        an array representing the selection
        Since:
        3.3
      • doClearAll

        protected abstract void doClearAll()
        Clears all the items in the receiver. The text, icon and other attributes of the items are set to their default values. If the table was created with the SWT.VIRTUAL style, these attributes are requested again as needed.
        Since:
        3.3
      • doResetItem

        protected abstract void doResetItem​(Item item)
        Resets the given item in the receiver. The text, icon and other attributes of the item are set to their default values.
        Parameters:
        item - the item to reset
        Since:
        3.3
      • doRemove

        protected abstract void doRemove​(int start,
                                         int end)
        Removes the items from the receiver which are between the given zero-relative start and end indices (inclusive).
        Parameters:
        start - the start of the range
        end - the end of the range
        Throws:
        IllegalArgumentException - - if either the start or end are not between 0 and the number of elements in the list minus 1 (inclusive)
        Since:
        3.3
      • doRemoveAll

        protected abstract void doRemoveAll()
        Removes all of the items from the receiver.
        Since:
        3.3
      • doRemove

        protected abstract void doRemove​(int[] indices)
        Removes the items from the receiver's list at the given zero-relative indices.
        Parameters:
        indices - the array of indices of the items
        Throws:
        IllegalArgumentException - - if the array is null, or if any of the indices is not between 0 and the number of elements in the list minus 1 (inclusive)
        Since:
        3.3
      • doShowItem

        protected abstract void doShowItem​(Item item)
        Shows the item. If the item is already showing in the receiver, this method simply returns. Otherwise, the items are scrolled until the item is visible.
        Parameters:
        item - the item to be shown
        Throws:
        IllegalArgumentException - - if the item is null
        Since:
        3.3
      • doDeselectAll

        protected abstract void doDeselectAll()
        Deselects all selected items in the receiver.
        Since:
        3.3
      • doSetSelection

        protected abstract void doSetSelection​(Item[] items)
        Sets the receiver's selection to be the given array of items. The current selection is cleared before the new items are selected, and if necessary the receiver is scrolled to make the new selection visible.

        Items that are not in the receiver are ignored. If the receiver is single-select and multiple items are specified, then all items are ignored.

        Parameters:
        items - the array of items
        Throws:
        IllegalArgumentException - - if the array of items is null
        Since:
        3.3
      • doShowSelection

        protected abstract void doShowSelection()
        Shows the selection. If the selection is already showing in the receiver, this method simply returns. Otherwise, the items are scrolled until the selection is visible.
        Since:
        3.3
      • doSetSelection

        protected abstract void doSetSelection​(int[] indices)
        Selects the items at the given zero-relative indices in the receiver. The current selection is cleared before the new items are selected, and if necessary the receiver is scrolled to make the new selection visible.

        Indices that are out of range and duplicate indices are ignored. If the receiver is single-select and multiple indices are specified, then all indices are ignored.

        Parameters:
        indices - the indices of the items to select
        Throws:
        IllegalArgumentException - - if the array of indices is null
        Since:
        3.3
      • doClear

        protected abstract void doClear​(int index)
        Clears the item at the given zero-relative index in the receiver. The text, icon and other attributes of the item are set to the default value. If the table was created with the SWT.VIRTUAL style, these attributes are requested again as needed.
        Parameters:
        index - the index of the item to clear
        Throws:
        IllegalArgumentException - - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)
        Since:
        3.3
        See Also:
        SWT.VIRTUAL, SWT.SetData
      • doSelect

        protected abstract void doSelect​(int[] indices)
        Selects the items at the given zero-relative indices in the receiver. The current selection is not cleared before the new items are selected.

        If the item at a given index is not selected, it is selected. If the item at a given index was already selected, it remains selected. Indices that are out of range and duplicate indices are ignored. If the receiver is single-select and multiple indices are specified, then all indices are ignored.

        Parameters:
        indices - the array of indices for the items to select
        Throws:
        IllegalArgumentException - - if the array of indices is null