Glimmer DSL for SWT File Drag and Drop

# From: https://github.com/AndyObtiva/glimmer-dsl-swt/blob/master/docs/reference/GLIMMER_SAMPLES.md#hello-drag-and-drop require 'glimmer-dsl-swt' class Location attr_accessor :country def country_options %w[USA Canada Mexico Columbia UK Australia Germany Italy Spain] end end @location = Location.new include Glimmer shell { text 'Hello, Drag and Drop!' tab_folder { tab_item { fill_layout text 'List' list { selection <=> [@location, :country] # Option 1: Automatic Drag Data Setting drag_source true # Option 2: Manual Drag Data Setting # on_drag_set_data do |event| # drag_widget = event.widget.control # event.data = drag_widget.selection.first # end # Option 3: Full Customization of Drag Source (details at: https://www.eclipse.org/articles/Article-SWT-DND/DND-in-SWT.html) # drag_source(:drop_copy) { # options: :drop_copy, :drop_link, :drop_move, :drop_target_move # transfer :text # options: :text, :file, :rtf # # on_drag_start do |event| # drag_widget = event.widget.control.data('proxy') # obtain Glimmer widget proxy since it permits nicer syntax for setting cursor via symbol # drag_widget.cursor = :wait # end # # on_drag_set_data do |event| # drag_widget = event.widget.control # event.data = drag_widget.selection.first # end # # on_drag_finished do |event| # drag_widget = event.widget.control.data('proxy') # obtain Glimmer widget proxy since it permits nicer syntax for setting cursor via symbol # drag_widget.cursor = :arrow # end # } } list { # Option 1: Automatic Drop Data Consumption drop_target true # drop_target :unique # setting drop_target to :unique makes the list not add the same data twice # Option 2: Manual Drop Data Consumption # on_drop do |event| # drop_widget = event.widget.control # drop_widget.add(event.data) # drop_widget.select(drop_widget.items.count - 1) # end # Option 3: Full Customization of Drop Target (details at: https://www.eclipse.org/articles/Article-SWT-DND/DND-in-SWT.html) # drop_target(:drop_copy) { # options: :drop_copy, :drop_link, :drop_move, :drop_target_move # transfer :text # options: :text, :file, :rtf # # on_drag_enter do |event| # ### event.detail = DND::DROP_NONE # To reject a drop, you can set event.detail to DND::DROP_NONE # drop_widget = event.widget.control.data('proxy') # obtain Glimmer widget proxy since it permits nicer syntax for setting background via symbol # drop_widget.background = :red # end # # on_drag_leave do |event| # drop_widget = event.widget.control.data('proxy') # obtain Glimmer widget proxy since it permits nicer syntax for setting background via symbol # drop_widget.background = :white # end # # on_drop do |event| # drop_widget = event.widget.control.data('proxy') # obtain Glimmer widget proxy since it permits nicer syntax for setting background/cursor via symbol # drop_widget.background = :white # drop_widget.add(event.data) # drop_widget.select(drop_widget.items.count - 1) # drop_widget.cursor = :arrow # end # } } } tab_item { grid_layout 2, true text 'Label' label { layout_data { horizontal_span 2 } text 'Drag text from any label and drop it unto another label' } { Argentina: :green, Brazil: :red, Finland: :yellow, Sweden: :magenta, Denmark: :gray, Iceland: :cyan }.each do |country, color| label { layout_data :fill, :fill, true, true text country font height: 20 background color drag_source true drop_target true } end } tab_item { grid_layout 2, true text 'Text' label { text 'Drag' } label { text 'Drop To Insert' } text { layout_data :fill, :center, true, false text 'Text1' drag_source true } text { layout_data :fill, :center, true, false text 'Drop To Insert' drop_target true } label { text 'Drag' } label { text 'Drop To Replace' } text { layout_data :fill, :center, true, false text 'Text2' drag_source true } text { layout_data :fill, :center, true, false text 'Drop To Replace' drop_target :replace } } tab_item { grid_layout 2, true text 'Spinner' label { text 'Drag' } label { text 'Drop To Insert' } spinner { layout_data :fill, :center, true, false selection 30 drag_source true } spinner { layout_data :fill, :center, true, false drop_target true } } tab_item { fill_layout text 'File' @drop_zone_label = label(:center, :wrap) { text 'Drop One File Or More Here' background :white rectangle { foreground :black line_width 4 line_style :dash } drop_target(:drop_copy) { transfer :file on_drag_enter do |event| drop_widget = event.widget.control.data('proxy') # obtain Glimmer widget proxy since it permits nicer syntax for setting background via symbol drop_widget.background = :yellow end on_drag_leave do |event| drop_widget = event.widget.control.data('proxy') # obtain Glimmer widget proxy since it permits nicer syntax for setting background via symbol drop_widget.background = :white end on_drop do |event| drop_widget = event.widget.control.data('proxy') # obtain Glimmer widget proxy since it permits nicer syntax for setting background/cursor via symbol drop_widget.background = :white @drop_zone_label.text = event.data.to_a.join("\n") end } } } } }.open