Class: Glimmer::SWT::TreeProxy

Inherits:
WidgetProxy show all
Includes:
Glimmer
Defined in:
lib/glimmer/swt/tree_proxy.rb

Constant Summary

Constants inherited from WidgetProxy

WidgetProxy::DEFAULT_INITIALIZERS, WidgetProxy::DEFAULT_STYLES, WidgetProxy::KEYWORD_ALIASES

Instance Attribute Summary collapse

Attributes inherited from WidgetProxy

#drag_source_proxy, #drag_source_style, #drag_source_transfer, #drop_target_proxy, #drop_target_transfer, #parent_proxy, #swt_widget

Instance Method Summary collapse

Methods included from Glimmer

included

Methods inherited from WidgetProxy

#add_observer, #async_exec, #can_add_observer?, #can_handle_drag_observation_request?, #can_handle_drop_observation_request?, #can_handle_observation_request?, #content, create, #dispose, #ensure_drag_source_proxy, #ensure_drop_target_proxy, #extract_args, #get_attribute, #handle_observation_request, #has_attribute?, #has_style?, #method_missing, #pack_same_size, #post_add_content, #post_initialize_child, #remove_observer, #respond_to?, #set_attribute, swt_widget_class_for, #sync_exec, underscored_widget_name, widget_exists?, widget_proxy_class

Methods included from Packages

included

Constructor Details

#initialize(underscored_widget_name, parent, args) ⇒ TreeProxy

Returns a new instance of TreeProxy.



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# File 'lib/glimmer/swt/tree_proxy.rb', line 32

def initialize(underscored_widget_name, parent, args)
  super
  @tree_editor = TreeEditor.new(swt_widget)
  @tree_editor.horizontalAlignment = SWTProxy[:left]
  @tree_editor.grabHorizontal = true
  @tree_editor.minimumHeight = 20
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Glimmer::SWT::WidgetProxy

Instance Attribute Details

#tree_editor ⇒ Object (readonly)

Returns the value of attribute tree_editor.



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# File 'lib/glimmer/swt/tree_proxy.rb', line 29

def tree_editor
  @tree_editor
end

#tree_editor_text_proxy ⇒ Object (readonly)

Returns the value of attribute tree_editor_text_proxy.



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# File 'lib/glimmer/swt/tree_proxy.rb', line 29

def tree_editor_text_proxy
  @tree_editor_text_proxy
end

#tree_properties ⇒ Object

Returns the value of attribute tree_properties.



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# File 'lib/glimmer/swt/tree_proxy.rb', line 30

def tree_properties
  @tree_properties
end

Instance Method Details

#all_tree_items ⇒ Object

Returns all tree items including descendants



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# File 'lib/glimmer/swt/tree_proxy.rb', line 50

def all_tree_items
  depth_first_search
end

#depth_first_search(&condition) ⇒ Object

Performs depth first search for tree items matching block condition If no condition block is passed, returns all tree items Returns a Java TreeItem array to easily set as selection on org.eclipse.swt.Tree if needed



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# File 'lib/glimmer/swt/tree_proxy.rb', line 43

def depth_first_search(&condition)
  found = []
  recursive_depth_first_search(swt_widget.getItems.first, found, &condition)
  found.to_java(TreeItem)
end

#edit_in_progress? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/tree_proxy.rb', line 66

def edit_in_progress?
  !!@edit_in_progress
end

#edit_selected_tree_item(before_write: nil, after_write: nil, after_cancel: nil) ⇒ Object 



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# File 'lib/glimmer/swt/tree_proxy.rb', line 70

def edit_selected_tree_item(before_write: nil, after_write: nil, after_cancel: nil)
  edit_tree_item(swt_widget.getSelection.first, before_write: before_write, after_write: after_write, after_cancel: after_cancel)
end

#edit_tree_item(tree_item, before_write: nil, after_write: nil, after_cancel: nil) ⇒ Object 



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# File 'lib/glimmer/swt/tree_proxy.rb', line 74

def edit_tree_item(tree_item, before_write: nil, after_write: nil, after_cancel: nil)
  return if tree_item.nil?
  content {
    @tree_editor_text_proxy = text {
      focus true
      text tree_item.getText
      action_taken = false
      cancel = lambda {
        @tree_editor_text_proxy.swt_widget.dispose
        @tree_editor_text_proxy = nil
        after_cancel&.call
        @edit_in_progress = false
      }
      action = lambda { |event|
        if !action_taken && !@edit_in_progress
          action_taken = true
          @edit_in_progress = true
          new_text = @tree_editor_text_proxy.swt_widget.getText
          if new_text == tree_item.getText
            cancel.call
          else
            before_write&.call
            tree_item.setText(new_text)
            model = tree_item.getData
            model.send("#{tree_properties[:text]}=", new_text) # makes tree update itself, so must search for selected tree item again
            edited_tree_item = depth_first_search { |ti| ti.getData == model }.first
            swt_widget.showItem(edited_tree_item)
            @tree_editor_text_proxy.swt_widget.dispose
            @tree_editor_text_proxy = nil
            after_write&.call(edited_tree_item)
            @edit_in_progress = false
          end
        end
      }
      on_focus_lost(&action)
      on_key_pressed { |key_event|
        if key_event.keyCode == swt(:cr)
          action.call(key_event)
        elsif key_event.keyCode == swt(:esc)
          cancel.call
        end
      }
    }
    @tree_editor_text_proxy.swt_widget.selectAll
  }
  @tree_editor.setEditor(@tree_editor_text_proxy.swt_widget, tree_item)
end

#widget_property_listener_installers ⇒ Object 



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# File 'lib/glimmer/swt/tree_proxy.rb', line 54

def widget_property_listener_installers
  super.merge({
    Java::OrgEclipseSwtWidgets::Tree => {
      selection: lambda do |observer|
        on_widget_selected { |selection_event|
          observer.call(@swt_widget.getSelection)
        }
      end
    },        
  })
end