Class: Redcar::TreeViewSWT

Inherits:
Object show all
Extended by:
Forwardable
Defined in:
plugins/tree_view_swt/lib/tree_view_swt.rb

Defined Under Namespace

Classes: DoubleClickListener, DragSourceListener, DropAdapter, EditorListener, MouseListener, OpenListener, SelectionChangedListener, SelectionListener, TreeListener, TreeMirrorContentProvider, TreeMirrorLabelProvider

Instance Attribute Summary (collapse)

Class Method Summary (collapse)

Instance Method Summary (collapse)

Constructor Details

- (TreeViewSWT) initialize(composite, model)

A new instance of TreeViewSWT



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 16

def initialize(composite, model)
  @composite, @model = composite, model
  color = ApplicationSWT.tree_background.swt_colors.first
  font_data = @composite.font.font_data.first
  font = Swt::Graphics::Font.new(
    ApplicationSWT.display,
    font_data.name,
    ApplicationSWT.tree_font_size,
    Swt::SWT::NORMAL)
  @composite.background = color
  tree_style = Swt::SWT::MULTI | Swt::SWT::H_SCROLL | Swt::SWT::V_SCROLL
  @viewer = JFace::Viewers::TreeViewer.new(@composite, tree_style)
  grid_data = Swt::Layout::GridData.new
  grid_data.grabExcessHorizontalSpace = true
  grid_data.horizontalAlignment = Swt::Layout::GridData::FILL
  grid_data.grabExcessVerticalSpace = true
  grid_data.verticalAlignment = Swt::Layout::GridData::FILL
  @viewer.get_tree.set_layout_data(grid_data)
  @composite.layout
  JFace::Viewers::ColumnViewerToolTipSupport.enableFor(@viewer)
  @viewer.set_content_provider(TreeMirrorContentProvider.new(self))
  @viewer.tree.font = font
  @viewer.tree.background = color
  #@viewer.getTree.setLinesVisible(true)
 #@viewer.getTree.setHeaderVisible(true)
  @viewer.set_label_provider(TreeMirrorLabelProvider.new(self))
  @viewer.set_input(@model.tree_mirror)

  if @model.tree_controller
    @viewer.add_tree_listener(@viewer.getControl, TreeListener.new)
    @viewer.add_double_click_listener(DoubleClickListener.new)
    @viewer.add_open_listener(OpenListener.new(@model))
    @viewer.add_selection_changed_listener(SelectionChangedListener.new(@model, @viewer))
    control.add_mouse_listener(MouseListener.new(self))
  end

  register_dnd if @model.tree_mirror.drag_and_drop?

  @model.add_listener(:refresh) do
    begin
      @viewer.refresh unless @viewer.getTree.isDisposed
    rescue => e
      handle_mirror_error(e)
    end
  end

  @editor = Swt::Custom::TreeEditor.new(control)

  @editor.horizontalAlignment = Swt::SWT::LEFT
  @editor.grabHorizontal = true

  @model.add_listener(:edit_element, &method(:edit_element))
  @model.add_listener(:expand_element, &method(:expand_element))
  @model.add_listener(:select_element, &method(:select_element))
  @model.add_listener(:focus, &method(:focus))
end

Instance Attribute Details

- (Object) model (readonly)

Returns the value of attribute model



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 4

def model
  @model
end

- (Object) viewer (readonly)

Returns the value of attribute viewer



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 4

def viewer
  @viewer
end

Class Method Details

+ (Object) storage 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 8

def self.storage
  @storage ||= begin
     storage = Plugin::Storage.new('tree_view_swt_plugin')
     storage.set_default('refresh_trees_on_refocus', true)
     storage
  end
end

Instance Method Details

- (Object) close Also known as: dispose 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 289

def close
  @viewer.getControl.dispose
end

- (Object) control 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 285

def control
  @viewer.get_control
end

- (Object) drag_controller 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 181

def drag_controller
  @model.tree_controller.drag_controller(@model)
end

- (Object) edit_element(element, select_from, select_to) 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 185

def edit_element(element, select_from, select_to)
  item = element_to_item(element)
  unless item
    puts "ERROR: when trying to edit, no visible item for #{element.inspect}"
    return
  end

  text = Swt::Widgets::Text.new(control, Swt::SWT::NONE)
  text.set_text(item.get_text)
  colour = ApplicationSWT.display.get_system_color(Swt::SWT::COLOR_GRAY)
  text.set_background(colour)

  @editor.set_editor(text, item)
  text.set_selection(select_from || 0, select_to || text.get_text.length)
  listener = EditorListener.new(self, element, text)
  text.add_listener(Swt::SWT::FocusOut, listener)
  text.add_listener(Swt::SWT::Traverse, listener)

  text.set_focus
end

- (Object) edited_element(element, text) 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 206

def edited_element(element, text)
  if @model.tree_controller and @model.tree_controller.respond_to?(:edited)
    Redcar.safely("edit element") do
      @model.tree_controller.edited(@model, element, text)
    end
  end
end

- (Object) element_to_item(element) 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 230

def element_to_item(element)
  @viewer.test_find_item(element)
end

- (Object) expand_element(element) 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 214

def expand_element(element)
  if item = element_to_item(element)
    @viewer.expandToLevel(element, 1)
  end
end

- (Object) focus 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 220

def focus
  @viewer.get_tree.set_focus
end

- (Object) handle_mirror_error(e) 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 307

def handle_mirror_error(e)
  if @model.tree_controller.respond_to?(:handle_error)
    begin
      @model.tree_controller.handle_error(@model, e)
    rescue => e
      puts "error in error hander: #{e.class} #{e.message}"
      puts e.backtrace
    end
  else
    puts e.class
    puts e.message
    puts e.backtrace
    Application::Dialog.message_box(e.message, :type => :error)
  end
end

- (Object) item_to_element(item) 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 234

def item_to_element(item)
  @viewer.getViewerRowFromItem(item).get_element
end

- (Object) register_dnd 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 162

def register_dnd
  case Redcar.safely { @model.tree_mirror.data_type }
  when :file
    types = [Swt::DND::FileTransfer.getInstance()].to_java(:org.eclipse.swt.dnd.FileTransfer")
  when :text
    types = [Swt::DND::TextTransfer.getInstance()].to_java(:org.eclipse.swt.dnd.TextTransfer")
  else
    raise "unknown tree data_type #{Redcar.safely { tree.tree_mirror.data_type }}"
  end
  operations = Swt::DND::DND::DROP_MOVE | Swt::DND::DND::DROP_COPY

  source_listener = DragSourceListener.new(self, @viewer.get_tree)
  drop_adapter = DropAdapter.new(self, source_listener, @viewer)
  drop_adapter.set_feedback_enabled(drag_controller.reorderable?)

  @viewer.add_drag_support(operations, types, source_listener)
  @viewer.add_drop_support(operations, types, drop_adapter)
end

- (Object) right_click(mouse_event) 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 294

def right_click(mouse_event)
  if @model.tree_controller
    point = Swt::Graphics::Point.new(mouse_event.x, mouse_event.y)
    item = @viewer.get_item_at(point)
    element = item ? @viewer.getViewerRowFromItem(item).get_element : nil
    if @model.tree_controller.respond_to?(:right_click)
      Redcar.safely("right click on tree") do
        @model.tree_controller.right_click(@model, element)
      end
    end
  end
end

- (Object) select_element(element) 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 224

def select_element(element)
  if item = element_to_item(element)
    @viewer.get_tree.set_selection(item)
  end
end

- (Object) selection 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 238

def selection
  @viewer.get_tree.get_selection.map {|i| item_to_element(i) }
end

- (Object) tree_mirror 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 73

def tree_mirror
  @model.tree_mirror
end

- (Object) visible_children_of(item) 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 248

def visible_children_of(item)
  if item.get_expanded
    items = item.get_items
    items.map {|item| [item, visible_children_of(item) ]}.flatten
  else
    []
  end
end

- (Object) visible_nodes 



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# File 'plugins/tree_view_swt/lib/tree_view_swt.rb', line 242

def visible_nodes
  items = @viewer.get_tree.get_items
  all_items = items.map {|item| [item, visible_children_of(item)] }.flatten
  all_items.map {|item| item_to_element(item) }
end