samples/hello/hello_drag_and_drop.rb
# Copyright (c) 2007-2024 Andy Maleh
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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 Replace'
}
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