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| # | |
| # tkdnd_unix.tcl -- | |
| # | |
| # This file implements some utility procedures that are used by the TkDND | |
| # package. | |
| # | |
| # This software is copyrighted by: | |
| # George Petasis, National Centre for Scientific Research "Demokritos", | |
| # Aghia Paraskevi, Athens, Greece. | |
| # e-mail: petasis@iit.demokritos.gr | |
| # | |
| # The following terms apply to all files associated | |
| # with the software unless explicitly disclaimed in individual files. | |
| # | |
| # The authors hereby grant permission to use, copy, modify, distribute, | |
| # and license this software and its documentation for any purpose, provided | |
| # that existing copyright notices are retained in all copies and that this | |
| # notice is included verbatim in any distributions. No written agreement, | |
| # license, or royalty fee is required for any of the authorized uses. | |
| # Modifications to this software may be copyrighted by their authors | |
| # and need not follow the licensing terms described here, provided that | |
| # the new terms are clearly indicated on the first page of each file where | |
| # they apply. | |
| # | |
| # IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY | |
| # FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES | |
| # ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY | |
| # DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE | |
| # POSSIBILITY OF SUCH DAMAGE. | |
| # | |
| # THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES, | |
| # INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, | |
| # FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. THIS SOFTWARE | |
| # IS PROVIDED ON AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE | |
| # NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR | |
| # MODIFICATIONS. | |
| # | |
| namespace eval xdnd { | |
| variable _dragging 0 | |
| proc initialise { } { | |
| ## Mapping from platform types to TkDND types... | |
| ::tkdnd::generic::initialise_platform_to_tkdnd_types [list \ | |
| text/plain\;charset=utf-8 DND_Text \ | |
| UTF8_STRING DND_Text \ | |
| text/plain DND_Text \ | |
| STRING DND_Text \ | |
| TEXT DND_Text \ | |
| COMPOUND_TEXT DND_Text \ | |
| text/uri-list DND_Files \ | |
| text/html\;charset=utf-8 DND_HTML \ | |
| text/html DND_HTML \ | |
| application/x-color DND_Color \ | |
| ] | |
| };# initialise | |
| };# namespace xdnd | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::HandleXdndEnter | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::HandleXdndEnter { path drag_source typelist time { data {} } } { | |
| variable _pressedkeys | |
| variable _actionlist | |
| variable _typelist | |
| set _pressedkeys 1 | |
| set _actionlist { copy move link ask private } | |
| set _typelist $typelist | |
| # puts "xdnd::HandleXdndEnter: $time" | |
| ::tkdnd::generic::SetDroppedData $data | |
| ::tkdnd::generic::HandleEnter $path $drag_source $typelist $typelist \ | |
| $_actionlist $_pressedkeys | |
| };# xdnd::HandleXdndEnter | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::HandleXdndPosition | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::HandleXdndPosition { drop_target rootX rootY time {drag_source {}} } { | |
| variable _pressedkeys | |
| variable _typelist | |
| variable _last_mouse_root_x; set _last_mouse_root_x $rootX | |
| variable _last_mouse_root_y; set _last_mouse_root_y $rootY | |
| # puts "xdnd::HandleXdndPosition: $time" | |
| ## Get the dropped data... | |
| catch { | |
| ::tkdnd::generic::SetDroppedData [GetPositionData $drop_target $_typelist $time] | |
| } | |
| ::tkdnd::generic::HandlePosition $drop_target $drag_source \ | |
| $_pressedkeys $rootX $rootY | |
| };# xdnd::HandleXdndPosition | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::HandleXdndLeave | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::HandleXdndLeave { } { | |
| ::tkdnd::generic::HandleLeave | |
| };# xdnd::HandleXdndLeave | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_HandleXdndDrop | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::HandleXdndDrop { time } { | |
| variable _pressedkeys | |
| variable _last_mouse_root_x | |
| variable _last_mouse_root_y | |
| ## Get the dropped data... | |
| ::tkdnd::generic::SetDroppedData [GetDroppedData \ | |
| [::tkdnd::generic::GetDragSource] [::tkdnd::generic::GetDropTarget] \ | |
| [::tkdnd::generic::GetDragSourceCommonTypes] $time] | |
| ::tkdnd::generic::HandleDrop {} {} $_pressedkeys \ | |
| $_last_mouse_root_x $_last_mouse_root_y $time | |
| };# xdnd::HandleXdndDrop | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::GetPositionData | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::GetPositionData { drop_target typelist time } { | |
| foreach {drop_target common_drag_source_types common_drop_target_types} \ | |
| [::tkdnd::generic::FindWindowWithCommonTypes $drop_target $typelist] {break} | |
| GetDroppedData [::tkdnd::generic::GetDragSource] $drop_target \ | |
| $common_drag_source_types $time | |
| };# xdnd::GetPositionData | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::GetDroppedData | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::GetDroppedData { _drag_source _drop_target _common_drag_source_types time } { | |
| if {![llength $_common_drag_source_types]} { | |
| error "no common data types between the drag source and drop target widgets" | |
| } | |
| ## Is drag source in this application? | |
| if {[catch {winfo pathname -displayof $_drop_target $_drag_source} p]} { | |
| set _use_tk_selection 0 | |
| } else { | |
| set _use_tk_selection 1 | |
| } | |
| foreach type $_common_drag_source_types { | |
| # puts "TYPE: $type ($_drop_target)" | |
| # _get_selection $_drop_target $time $type | |
| if {$_use_tk_selection} { | |
| if {![catch { | |
| selection get -displayof $_drop_target -selection XdndSelection \ | |
| -type $type | |
| } result options]} { | |
| return [normalise_data $type $result] | |
| } | |
| } else { | |
| # puts "_selection_get -displayof $_drop_target -selection XdndSelection \ | |
| # -type $type -time $time" | |
| #after 100 [list focus -force $_drop_target] | |
| #after 50 [list raise [winfo toplevel $_drop_target]] | |
| if {![catch { | |
| _selection_get -displayof $_drop_target -selection XdndSelection \ | |
| -type $type -time $time | |
| } result options]} { | |
| return [normalise_data $type $result] | |
| } | |
| } | |
| } | |
| return -options $options $result | |
| };# xdnd::GetDroppedData | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::platform_specific_types | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::platform_specific_types { types } { | |
| ::tkdnd::generic::platform_specific_types $types | |
| }; # xdnd::platform_specific_types | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::platform_specific_type | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::platform_specific_type { type } { | |
| ::tkdnd::generic::platform_specific_type $type | |
| }; # xdnd::platform_specific_type | |
| # ---------------------------------------------------------------------------- | |
| # Command tkdnd::platform_independent_types | |
| # ---------------------------------------------------------------------------- | |
| proc ::tkdnd::platform_independent_types { types } { | |
| ::tkdnd::generic::platform_independent_types $types | |
| }; # tkdnd::platform_independent_types | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::platform_independent_type | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::platform_independent_type { type } { | |
| ::tkdnd::generic::platform_independent_type $type | |
| }; # xdnd::platform_independent_type | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_normalise_data | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::normalise_data { type data } { | |
| # Tk knows how to interpret the following types: | |
| # STRING, TEXT, COMPOUND_TEXT | |
| # UTF8_STRING | |
| # Else, it returns a list of 8 or 32 bit numbers... | |
| switch -glob $type { | |
| STRING - UTF8_STRING - TEXT - COMPOUND_TEXT {return $data} | |
| text/html { | |
| if {[catch { | |
| encoding convertfrom unicode $data | |
| } string]} { | |
| set string $data | |
| } | |
| return [string map {\r\n \n} $string] | |
| } | |
| text/html\;charset=utf-8 - | |
| text/plain\;charset=utf-8 - | |
| text/plain { | |
| if {[catch { | |
| encoding convertfrom utf-8 [tkdnd::bytes_to_string $data] | |
| } string]} { | |
| set string $data | |
| } | |
| return [string map {\r\n \n} $string] | |
| } | |
| text/uri-list* { | |
| if {[catch { | |
| encoding convertfrom utf-8 [tkdnd::bytes_to_string $data] | |
| } string]} { | |
| set string $data | |
| } | |
| ## Get rid of \r\n | |
| set string [string trim [string map {\r\n \n} $string]] | |
| set files {} | |
| foreach quoted_file [split $string] { | |
| set file [tkdnd::urn_unquote $quoted_file] | |
| switch -glob $file { | |
| \#* {} | |
| file://* {lappend files [string range $file 7 end]} | |
| ftp://* - | |
| https://* - | |
| http://* {lappend files $quoted_file} | |
| default {lappend files $file} | |
| } | |
| } | |
| return $files | |
| } | |
| application/x-color { | |
| return $data | |
| } | |
| text/x-moz-url - | |
| application/q-iconlist - | |
| default {return $data} | |
| } | |
| }; # xdnd::normalise_data | |
| ############################################################################# | |
| ## | |
| ## XDND drag implementation | |
| ## | |
| ############################################################################# | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_selection_ownership_lost | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_selection_ownership_lost {} { | |
| variable _dragging | |
| set _dragging 0 | |
| };# _selection_ownership_lost | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_dodragdrop | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_dodragdrop { source actions types data button } { | |
| variable _dragging | |
| # puts "xdnd::_dodragdrop: source: $source, actions: $actions, types: $types,\ | |
| # data: \"$data\", button: $button" | |
| if {$_dragging} { | |
| ## We are in the middle of another drag operation... | |
| error "another drag operation in progress" | |
| } | |
| variable _dodragdrop_drag_source $source | |
| variable _dodragdrop_drop_target 0 | |
| variable _dodragdrop_drop_target_proxy 0 | |
| variable _dodragdrop_actions $actions | |
| variable _dodragdrop_action_descriptions $actions | |
| variable _dodragdrop_actions_len [llength $actions] | |
| variable _dodragdrop_types $types | |
| variable _dodragdrop_types_len [llength $types] | |
| variable _dodragdrop_data $data | |
| variable _dodragdrop_transfer_data {} | |
| variable _dodragdrop_button $button | |
| variable _dodragdrop_time 0 | |
| variable _dodragdrop_default_action refuse_drop | |
| variable _dodragdrop_waiting_status 0 | |
| variable _dodragdrop_drop_target_accepts_drop 0 | |
| variable _dodragdrop_drop_target_accepts_action refuse_drop | |
| variable _dodragdrop_current_cursor $_dodragdrop_default_action | |
| variable _dodragdrop_drop_occured 0 | |
| variable _dodragdrop_selection_requestor 0 | |
| ## | |
| ## If we have more than 3 types, the property XdndTypeList must be set on | |
| ## the drag source widget... | |
| ## | |
| if {$_dodragdrop_types_len > 3} { | |
| _announce_type_list $_dodragdrop_drag_source $_dodragdrop_types | |
| } | |
| ## | |
| ## Announce the actions & their descriptions on the XdndActionList & | |
| ## XdndActionDescription properties... | |
| ## | |
| _announce_action_list $_dodragdrop_drag_source $_dodragdrop_actions \ | |
| $_dodragdrop_action_descriptions | |
| ## | |
| ## Arrange selection handlers for our drag source, and all the supported types | |
| ## | |
| registerSelectionHandler $source $types | |
| ## | |
| ## Step 1: When a drag begins, the source takes ownership of XdndSelection. | |
| ## | |
| selection own -command ::tkdnd::xdnd::_selection_ownership_lost \ | |
| -selection XdndSelection $source | |
| set _dragging 1 | |
| ## Grab the mouse pointer... | |
| _grab_pointer $source $_dodragdrop_default_action | |
| ## Register our generic event handler... | |
| # The generic event callback will report events by modifying variable | |
| # ::xdnd::_dodragdrop_event: a dict with event information will be set as | |
| # the value of the variable... | |
| _register_generic_event_handler | |
| ## Set a timeout for debugging purposes... | |
| # after 60000 {set ::tkdnd::xdnd::_dragging 0} | |
| tkwait variable ::tkdnd::xdnd::_dragging | |
| _SendXdndLeave | |
| set _dragging 0 | |
| _ungrab_pointer $source | |
| _unregister_generic_event_handler | |
| catch {selection clear -selection XdndSelection} | |
| unregisterSelectionHandler $source $types | |
| return $_dodragdrop_drop_target_accepts_action | |
| };# xdnd::_dodragdrop | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_process_drag_events | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_process_drag_events {event} { | |
| # The return value from proc is normally 0. A non-zero return value indicates | |
| # that the event is not to be handled further; that is, proc has done all | |
| # processing that is to be allowed for the event | |
| variable _dragging | |
| if {!$_dragging} {return 0} | |
| # puts $event | |
| variable _dodragdrop_time | |
| set time [dict get $event time] | |
| set type [dict get $event type] | |
| if {$time < $_dodragdrop_time && ![string equal $type SelectionRequest]} { | |
| return 0 | |
| } | |
| set _dodragdrop_time $time | |
| variable _dodragdrop_drag_source | |
| variable _dodragdrop_drop_target | |
| variable _dodragdrop_drop_target_proxy | |
| variable _dodragdrop_default_action | |
| switch $type { | |
| MotionNotify { | |
| set rootx [dict get $event x_root] | |
| set rooty [dict get $event y_root] | |
| set window [_find_drop_target_window $_dodragdrop_drag_source \ | |
| $rootx $rooty] | |
| if {[string length $window]} { | |
| ## Examine the modifiers to suggest an action... | |
| set _dodragdrop_default_action [_default_action $event] | |
| ## Is it a Tk widget? | |
| # set path [winfo containing $rootx $rooty] | |
| # puts "Window under mouse: $window ($path)" | |
| if {$_dodragdrop_drop_target != $window} { | |
| ## Send XdndLeave to $_dodragdrop_drop_target | |
| _SendXdndLeave | |
| ## Is there a proxy? If not, _find_drop_target_proxy returns the | |
| ## target window, so we always get a valid "proxy". | |
| set proxy [_find_drop_target_proxy $_dodragdrop_drag_source $window] | |
| ## Send XdndEnter to $window | |
| _SendXdndEnter $window $proxy | |
| ## Send XdndPosition to $_dodragdrop_drop_target | |
| _SendXdndPosition $rootx $rooty $_dodragdrop_default_action | |
| } else { | |
| ## Send XdndPosition to $_dodragdrop_drop_target | |
| _SendXdndPosition $rootx $rooty $_dodragdrop_default_action | |
| } | |
| } else { | |
| ## No window under the mouse. Send XdndLeave to $_dodragdrop_drop_target | |
| _SendXdndLeave | |
| } | |
| } | |
| ButtonPress { | |
| } | |
| ButtonRelease { | |
| variable _dodragdrop_button | |
| set button [dict get $event button] | |
| if {$button == $_dodragdrop_button} { | |
| ## The button that initiated the drag was released. Trigger drop... | |
| _SendXdndDrop | |
| } | |
| return 1 | |
| } | |
| KeyPress { | |
| } | |
| KeyRelease { | |
| set keysym [dict get $event keysym] | |
| switch $keysym { | |
| Escape { | |
| ## The user has pressed escape. Abort... | |
| if {$_dragging} {set _dragging 0} | |
| } | |
| } | |
| } | |
| SelectionRequest { | |
| variable _dodragdrop_selection_requestor | |
| variable _dodragdrop_selection_property | |
| variable _dodragdrop_selection_selection | |
| variable _dodragdrop_selection_target | |
| variable _dodragdrop_selection_time | |
| set _dodragdrop_selection_requestor [dict get $event requestor] | |
| set _dodragdrop_selection_property [dict get $event property] | |
| set _dodragdrop_selection_selection [dict get $event selection] | |
| set _dodragdrop_selection_target [dict get $event target] | |
| set _dodragdrop_selection_time $time | |
| return 0 | |
| } | |
| default { | |
| return 0 | |
| } | |
| } | |
| return 0 | |
| };# _process_drag_events | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_SendXdndEnter | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_SendXdndEnter {window proxy} { | |
| variable _dodragdrop_drag_source | |
| variable _dodragdrop_drop_target | |
| variable _dodragdrop_drop_target_proxy | |
| variable _dodragdrop_types | |
| variable _dodragdrop_waiting_status | |
| variable _dodragdrop_drop_occured | |
| if {$_dodragdrop_drop_target > 0} _SendXdndLeave | |
| if {$_dodragdrop_drop_occured} return | |
| set _dodragdrop_drop_target $window | |
| set _dodragdrop_drop_target_proxy $proxy | |
| set _dodragdrop_waiting_status 0 | |
| if {$_dodragdrop_drop_target < 1} return | |
| # puts "XdndEnter: $_dodragdrop_drop_target $_dodragdrop_drop_target_proxy" | |
| _send_XdndEnter $_dodragdrop_drag_source $_dodragdrop_drop_target \ | |
| $_dodragdrop_drop_target_proxy $_dodragdrop_types | |
| };# xdnd::_SendXdndEnter | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_SendXdndPosition | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_SendXdndPosition {rootx rooty action} { | |
| variable _dodragdrop_drag_source | |
| variable _dodragdrop_drop_target | |
| if {$_dodragdrop_drop_target < 1} return | |
| variable _dodragdrop_drop_occured | |
| if {$_dodragdrop_drop_occured} return | |
| variable _dodragdrop_drop_target_proxy | |
| variable _dodragdrop_waiting_status | |
| ## Arrange a new XdndPosition, to be send periodically... | |
| variable _dodragdrop_xdnd_position_heartbeat | |
| catch {after cancel $_dodragdrop_xdnd_position_heartbeat} | |
| set _dodragdrop_xdnd_position_heartbeat [after 200 \ | |
| [list ::tkdnd::xdnd::_SendXdndPosition $rootx $rooty $action]] | |
| if {$_dodragdrop_waiting_status} {return} | |
| # puts "XdndPosition: $_dodragdrop_drop_target $rootx $rooty $action" | |
| _send_XdndPosition $_dodragdrop_drag_source $_dodragdrop_drop_target \ | |
| $_dodragdrop_drop_target_proxy $rootx $rooty $action | |
| set _dodragdrop_waiting_status 1 | |
| };# xdnd::_SendXdndPosition | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_HandleXdndStatus | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_HandleXdndStatus {event} { | |
| variable _dodragdrop_drop_target | |
| variable _dodragdrop_waiting_status | |
| variable _dodragdrop_drop_target_accepts_drop | |
| variable _dodragdrop_drop_target_accepts_action | |
| set _dodragdrop_waiting_status 0 | |
| foreach key {target accept want_position action x y w h} { | |
| set $key [dict get $event $key] | |
| } | |
| set _dodragdrop_drop_target_accepts_drop $accept | |
| set _dodragdrop_drop_target_accepts_action $action | |
| if {$_dodragdrop_drop_target < 1} return | |
| variable _dodragdrop_drop_occured | |
| if {$_dodragdrop_drop_occured} return | |
| _update_cursor | |
| # puts "XdndStatus: $event" | |
| };# xdnd::_HandleXdndStatus | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_HandleXdndFinished | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_HandleXdndFinished {event} { | |
| variable _dodragdrop_xdnd_finished_event_after_id | |
| catch {after cancel $_dodragdrop_xdnd_finished_event_after_id} | |
| set _dodragdrop_xdnd_finished_event_after_id {} | |
| variable _dodragdrop_drop_target | |
| set _dodragdrop_drop_target 0 | |
| variable _dragging | |
| if {$_dragging} {set _dragging 0} | |
| variable _dodragdrop_drop_target_accepts_drop | |
| variable _dodragdrop_drop_target_accepts_action | |
| if {[dict size $event]} { | |
| foreach key {target accept action} { | |
| set $key [dict get $event $key] | |
| } | |
| set _dodragdrop_drop_target_accepts_drop $accept | |
| set _dodragdrop_drop_target_accepts_action $action | |
| } else { | |
| set _dodragdrop_drop_target_accepts_drop 0 | |
| } | |
| if {!$_dodragdrop_drop_target_accepts_drop} { | |
| set _dodragdrop_drop_target_accepts_action refuse_drop | |
| } | |
| # puts "XdndFinished: $event" | |
| };# xdnd::_HandleXdndFinished | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_SendXdndLeave | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_SendXdndLeave {} { | |
| variable _dodragdrop_drag_source | |
| variable _dodragdrop_drop_target | |
| if {$_dodragdrop_drop_target < 1} return | |
| variable _dodragdrop_drop_target_proxy | |
| # puts "XdndLeave: $_dodragdrop_drop_target" | |
| _send_XdndLeave $_dodragdrop_drag_source $_dodragdrop_drop_target \ | |
| $_dodragdrop_drop_target_proxy | |
| set _dodragdrop_drop_target 0 | |
| variable _dodragdrop_drop_target_accepts_drop | |
| variable _dodragdrop_drop_target_accepts_action | |
| set _dodragdrop_drop_target_accepts_drop 0 | |
| set _dodragdrop_drop_target_accepts_action refuse_drop | |
| variable _dodragdrop_drop_occured | |
| if {$_dodragdrop_drop_occured} return | |
| _update_cursor | |
| };# xdnd::_SendXdndLeave | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_SendXdndDrop | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_SendXdndDrop {} { | |
| variable _dodragdrop_drag_source | |
| variable _dodragdrop_drop_target | |
| if {$_dodragdrop_drop_target < 1} { | |
| ## The mouse has been released over a widget that does not accept drops. | |
| _HandleXdndFinished {} | |
| return | |
| } | |
| variable _dodragdrop_drop_occured | |
| if {$_dodragdrop_drop_occured} {return} | |
| variable _dodragdrop_drop_target_proxy | |
| variable _dodragdrop_drop_target_accepts_drop | |
| variable _dodragdrop_drop_target_accepts_action | |
| set _dodragdrop_drop_occured 1 | |
| _update_cursor clock | |
| if {!$_dodragdrop_drop_target_accepts_drop} { | |
| _SendXdndLeave | |
| _HandleXdndFinished {} | |
| return | |
| } | |
| # puts "XdndDrop: $_dodragdrop_drop_target" | |
| variable _dodragdrop_drop_timestamp | |
| set _dodragdrop_drop_timestamp [_send_XdndDrop \ | |
| $_dodragdrop_drag_source $_dodragdrop_drop_target \ | |
| $_dodragdrop_drop_target_proxy] | |
| set _dodragdrop_drop_target 0 | |
| # puts "XdndDrop: $_dodragdrop_drop_target" | |
| ## Arrange a timeout for receiving XdndFinished... | |
| variable _dodragdrop_xdnd_finished_event_after_id | |
| set _dodragdrop_xdnd_finished_event_after_id \ | |
| [after 10000 [list ::tkdnd::xdnd::_HandleXdndFinished {}]] | |
| };# xdnd::_SendXdndDrop | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_update_cursor | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_update_cursor { {cursor {}}} { | |
| # puts "_update_cursor $cursor" | |
| variable _dodragdrop_current_cursor | |
| variable _dodragdrop_drag_source | |
| variable _dodragdrop_drop_target_accepts_drop | |
| variable _dodragdrop_drop_target_accepts_action | |
| if {![string length $cursor]} { | |
| set cursor refuse_drop | |
| if {$_dodragdrop_drop_target_accepts_drop} { | |
| set cursor $_dodragdrop_drop_target_accepts_action | |
| } | |
| } | |
| if {![string equal $cursor $_dodragdrop_current_cursor]} { | |
| _set_pointer_cursor $_dodragdrop_drag_source $cursor | |
| set _dodragdrop_current_cursor $cursor | |
| } | |
| };# xdnd::_update_cursor | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_default_action | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_default_action {event} { | |
| variable _dodragdrop_actions | |
| variable _dodragdrop_actions_len | |
| if {$_dodragdrop_actions_len == 1} {return [lindex $_dodragdrop_actions 0]} | |
| set alt [dict get $event Alt] | |
| set shift [dict get $event Shift] | |
| set control [dict get $event Control] | |
| if {$shift && $control && [lsearch $_dodragdrop_actions link] != -1} { | |
| return link | |
| } elseif {$control && [lsearch $_dodragdrop_actions copy] != -1} { | |
| return copy | |
| } elseif {$shift && [lsearch $_dodragdrop_actions move] != -1} { | |
| return move | |
| } elseif {$alt && [lsearch $_dodragdrop_actions link] != -1} { | |
| return link | |
| } | |
| return default | |
| };# xdnd::_default_action | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::getFormatForType | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::getFormatForType {type} { | |
| switch -glob [string tolower $type] { | |
| text/plain\;charset=utf-8 - | |
| text/html\;charset=utf-8 - | |
| utf8_string {set format UTF8_STRING} | |
| text/html - | |
| text/plain - | |
| string - | |
| text - | |
| compound_text {set format STRING} | |
| text/uri-list* {set format UTF8_STRING} | |
| application/x-color {set format $type} | |
| default {set format $type} | |
| } | |
| return $format | |
| };# xdnd::getFormatForType | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::registerSelectionHandler | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::registerSelectionHandler {source types} { | |
| foreach type $types { | |
| selection handle -selection XdndSelection \ | |
| -type $type \ | |
| -format [getFormatForType $type] \ | |
| $source [list ::tkdnd::xdnd::_SendData $type] | |
| } | |
| };# xdnd::registerSelectionHandler | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::unregisterSelectionHandler | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::unregisterSelectionHandler {source types} { | |
| foreach type $types { | |
| catch { | |
| selection handle -selection XdndSelection \ | |
| -type $type \ | |
| -format [getFormatForType $type] \ | |
| $source {} | |
| } | |
| } | |
| };# xdnd::unregisterSelectionHandler | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_convert_to_unsigned | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_convert_to_unsigned {data format} { | |
| switch $format { | |
| 8 { set mask 0xff } | |
| 16 { set mask 0xffff } | |
| 32 { set mask 0xffffff } | |
| default {error "unsupported format $format"} | |
| } | |
| ## Convert signed integer into unsigned... | |
| set d [list] | |
| foreach num $data { | |
| lappend d [expr { $num & $mask }] | |
| } | |
| return $d | |
| };# xdnd::_convert_to_unsigned | |
| # ---------------------------------------------------------------------------- | |
| # Command xdnd::_SendData | |
| # ---------------------------------------------------------------------------- | |
| proc xdnd::_SendData {type offset bytes args} { | |
| variable _dodragdrop_drag_source | |
| variable _dodragdrop_types | |
| variable _dodragdrop_data | |
| variable _dodragdrop_transfer_data | |
| ## The variable _dodragdrop_data contains a list of data, one for each | |
| ## type in the _dodragdrop_types variable. We have to search types, and find | |
| ## the corresponding entry in the _dodragdrop_data list. | |
| set index [lsearch $_dodragdrop_types $type] | |
| if {$index < 0} { | |
| error "unable to locate data suitable for type \"$type\"" | |
| } | |
| set typed_data [lindex $_dodragdrop_data $index] | |
| set format 8 | |
| if {$offset == 0} { | |
| ## Prepare the data to be transferred... | |
| switch -glob $type { | |
| text/plain* - UTF8_STRING - STRING - TEXT - COMPOUND_TEXT { | |
| binary scan [encoding convertto utf-8 $typed_data] \ | |
| c* _dodragdrop_transfer_data | |
| set _dodragdrop_transfer_data \ | |
| [_convert_to_unsigned $_dodragdrop_transfer_data $format] | |
| } | |
| text/uri-list* { | |
| set files [list] | |
| foreach file $typed_data { | |
| switch -glob $file { | |
| *://* {lappend files $file} | |
| default {lappend files file://$file} | |
| } | |
| } | |
| binary scan [encoding convertto utf-8 "[join $files \r\n]\r\n"] \ | |
| c* _dodragdrop_transfer_data | |
| set _dodragdrop_transfer_data \ | |
| [_convert_to_unsigned $_dodragdrop_transfer_data $format] | |
| } | |
| application/x-color { | |
| set format 16 | |
| ## Try to understand the provided data: we accept a standard Tk colour, | |
| ## or a list of 3 values (red green blue) or a list of 4 values | |
| ## (red green blue opacity). | |
| switch [llength $typed_data] { | |
| 1 { set color [winfo rgb $_dodragdrop_drag_source $typed_data] | |
| lappend color 65535 } | |
| 3 { set color $typed_data; lappend color 65535 } | |
| 4 { set color $typed_data } | |
| default {error "unknown color data: \"$typed_data\""} | |
| } | |
| ## Convert the 4 elements into 16 bit values... | |
| set _dodragdrop_transfer_data [list] | |
| foreach c $color { | |
| lappend _dodragdrop_transfer_data [format 0x%04X $c] | |
| } | |
| } | |
| default { | |
| set format 32 | |
| binary scan $typed_data c* _dodragdrop_transfer_data | |
| } | |
| } | |
| } | |
| ## | |
| ## Data has been split into bytes. Count the bytes requested, and return them | |
| ## | |
| set data [lrange $_dodragdrop_transfer_data $offset [expr {$offset+$bytes-1}]] | |
| switch $format { | |
| 8 { | |
| set data [encoding convertfrom utf-8 [binary format c* $data]] | |
| } | |
| 16 { | |
| variable _dodragdrop_selection_requestor | |
| if {$_dodragdrop_selection_requestor} { | |
| ## Tk selection cannot process this format (only 8 & 32 supported). | |
| ## Call our XChangeProperty... | |
| set numItems [llength $data] | |
| variable _dodragdrop_selection_property | |
| variable _dodragdrop_selection_selection | |
| variable _dodragdrop_selection_target | |
| variable _dodragdrop_selection_time | |
| XChangeProperty $_dodragdrop_drag_source \ | |
| $_dodragdrop_selection_requestor \ | |
| $_dodragdrop_selection_property \ | |
| $_dodragdrop_selection_target \ | |
| $format \ | |
| $_dodragdrop_selection_time \ | |
| $data $numItems | |
| return -code break | |
| } | |
| } | |
| 32 { | |
| } | |
| default { | |
| error "unsupported format $format" | |
| } | |
| } | |
| # puts "SendData: $type $offset $bytes $args ($typed_data)" | |
| # puts " $data" | |
| return $data | |
| };# xdnd::_SendData | |