Class: Clevic::CellEditor

Inherits:
Object show all
Defined in:
lib/clevic/swing/cell_editor.rb

Overview

This is the glue class that interfaces with JTable’s API There’s usually only ever one of them for any given JTable, so it’s created once, and then re-used repeatedly. Must inherit from JComponent so that it gets focus when the editing starts

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(table_view) ⇒ CellEditor

Returns a new instance of CellEditor.



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# File 'lib/clevic/swing/cell_editor.rb', line 11

def initialize( table_view )
  super()
  @table_view = table_view
  @listeners = []
end

Instance Attribute Details

#index ⇒ Object (readonly)

Returns the value of attribute index.



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# File 'lib/clevic/swing/cell_editor.rb', line 18

def index
  @index
end

#listeners ⇒ Object

Returns the value of attribute listeners.



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# File 'lib/clevic/swing/cell_editor.rb', line 17

def listeners
  @listeners
end

Instance Method Details

#addCellEditorListener(cell_editor_listener) ⇒ Object

Adds a listener to the list that’s notified when the editor stops, or cancels editing.



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# File 'lib/clevic/swing/cell_editor.rb', line 41

def addCellEditorListener(cell_editor_listener)
  listeners << cell_editor_listener
end

#cancelCellEditing ⇒ Object

Tells the editor to cancel editing and not accept any partially edited value.



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# File 'lib/clevic/swing/cell_editor.rb', line 50

def cancelCellEditing
  listeners.each do |listener|
    listener.editingCancelled( change_event )
  end
end

#change_event ⇒ Object 



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# File 'lib/clevic/swing/cell_editor.rb', line 45

def change_event
  @change_event ||= javax.swing.event.ChangeEvent.new( self )
end

#delegate ⇒ Object 



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# File 'lib/clevic/swing/cell_editor.rb', line 20

def delegate
  index.field.delegate
end

#getCellEditorValue ⇒ Object

Returns the value contained in the editor.



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# File 'lib/clevic/swing/cell_editor.rb', line 57

def getCellEditorValue
  delegate.value
end

#getTableCellEditorComponent(jtable, value, selected, row_index, column_index) ⇒ Object

override TableCellEditor methods basically, initialize a component to send back to the JTable, and store a bunch of state information



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# File 'lib/clevic/swing/cell_editor.rb', line 27

def getTableCellEditorComponent(jtable, value, selected, row_index, column_index)
  # remember index for later. The delegate and the editor and the value
  # all come from it.
  @index = @table_view.model.create_index( row_index, column_index )

  # use the delegate's component. It actually comes from the index, which
  # is a bit weird. But anyway.
  delegate.entity = @index.entity
  # need self so combo boxes can get back here and stop editing when enter is pressed
  delegate.init_component( self )
  delegate.editor
end

#isCellEditable(event_object) ⇒ Object

Asks the editor if it can start editing using anEvent.



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# File 'lib/clevic/swing/cell_editor.rb', line 62

def isCellEditable(event_object)
  true
end

#removeCellEditorListener(cell_editor_listener) ⇒ Object

Removes a listener from the list that’s notified



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# File 'lib/clevic/swing/cell_editor.rb', line 67

def removeCellEditorListener(cell_editor_listener)
  listeners.delete cell_editor_listener
end

#shouldSelectCell(event_object) ⇒ Object

Docs say not used, as of Java-1.2. But it is used. Not sure what to do with it, really.



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# File 'lib/clevic/swing/cell_editor.rb', line 73

def shouldSelectCell(event_object)
  true
end

#stopCellEditing ⇒ Object

Tells the editor to stop editing and accept any partially edited value as the value of the editor true if editing was stopped, false otherwise



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# File 'lib/clevic/swing/cell_editor.rb', line 79

def stopCellEditing
  listeners.each do |listener|
    listener.editingStopped( change_event )
  end

  # can return false here if editing should not stop
  # for some reason, ie validation didn't succeed
  true
rescue
  puts
  puts $!.backtrace
  puts "returning false from stopCellEditing"
  false
end