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| # | |
| # tkdnd_generic.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: [email protected] | |
| # | |
| # 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 generic { | |
| variable _types {} | |
| variable _typelist {} | |
| variable _codelist {} | |
| variable _actionlist {} | |
| variable _pressedkeys {} | |
| variable _action {} | |
| variable _common_drag_source_types {} | |
| variable _common_drop_target_types {} | |
| variable _drag_source {} | |
| variable _drop_target {} | |
| variable _last_mouse_root_x 0 | |
| variable _last_mouse_root_y 0 | |
| variable _tkdnd2platform | |
| variable _platform2tkdnd | |
| proc debug {msg} { | |
| puts $msg | |
| };# debug | |
| proc initialise { } { | |
| };# initialise | |
| proc initialise_platform_to_tkdnd_types { types } { | |
| variable _platform2tkdnd | |
| variable _tkdnd2platform | |
| set _platform2tkdnd [dict create {*}$types] | |
| set _tkdnd2platform [dict create] | |
| foreach type [dict keys $_platform2tkdnd] { | |
| dict lappend _tkdnd2platform [dict get $_platform2tkdnd $type] $type | |
| } | |
| };# initialise_platform_to_tkdnd_types | |
| proc initialise_tkdnd_to_platform_types { types } { | |
| variable _tkdnd2platform | |
| set _tkdnd2platform [dict create {*}$types] | |
| };# initialise_tkdnd_to_platform_types | |
| };# namespace generic | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::HandleEnter | |
| # ---------------------------------------------------------------------------- | |
| proc generic::HandleEnter { drop_target drag_source typelist codelist | |
| actionlist pressedkeys } { | |
| variable _typelist; set _typelist $typelist | |
| variable _pressedkeys; set _pressedkeys $pressedkeys | |
| variable _action; set _action refuse_drop | |
| variable _common_drag_source_types; set _common_drag_source_types {} | |
| variable _common_drop_target_types; set _common_drop_target_types {} | |
| variable _actionlist | |
| variable _drag_source; set _drag_source $drag_source | |
| variable _drop_target; set _drop_target {} | |
| variable _actionlist; set _actionlist $actionlist | |
| variable _codelist set _codelist $codelist | |
| variable _last_mouse_root_x; set _last_mouse_root_x 0 | |
| variable _last_mouse_root_y; set _last_mouse_root_y 0 | |
| # debug "\n===============================================================" | |
| # debug "generic::HandleEnter: drop_target=$drop_target,\ | |
| # drag_source=$drag_source,\ | |
| # typelist=$typelist" | |
| # debug "generic::HandleEnter: ACTION: default" | |
| return default | |
| };# generic::HandleEnter | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::HandlePosition | |
| # ---------------------------------------------------------------------------- | |
| proc generic::HandlePosition { drop_target drag_source pressedkeys | |
| rootX rootY { time 0 } } { | |
| variable _types | |
| variable _typelist | |
| variable _codelist | |
| variable _actionlist | |
| variable _pressedkeys | |
| variable _action | |
| variable _common_drag_source_types | |
| variable _common_drop_target_types | |
| variable _drag_source | |
| variable _drop_target | |
| variable _last_mouse_root_x; set _last_mouse_root_x $rootX | |
| variable _last_mouse_root_y; set _last_mouse_root_y $rootY | |
| # debug "generic::HandlePosition: drop_target=$drop_target,\ | |
| # _drop_target=$_drop_target, rootX=$rootX, rootY=$rootY" | |
| if {![info exists _drag_source] && ![string length $_drag_source]} { | |
| # debug "generic::HandlePosition: no or empty _drag_source:\ | |
| # return refuse_drop" | |
| return refuse_drop | |
| } | |
| if {$drag_source ne "" && $drag_source ne $_drag_source} { | |
| debug "generic position event from unexpected source: $_drag_source\ | |
| != $drag_source" | |
| return refuse_drop | |
| } | |
| set _pressedkeys $pressedkeys | |
| ## Does the new drop target support any of our new types? | |
| # foreach {common_drag_source_types common_drop_target_types} \ | |
| # [GetWindowCommonTypes $drop_target $_typelist] {break} | |
| foreach {drop_target common_drag_source_types common_drop_target_types} \ | |
| [FindWindowWithCommonTypes $drop_target $_typelist] {break} | |
| set data [GetDroppedData $time] | |
| # debug "\t($_drop_target) -> ($drop_target)" | |
| if {$drop_target != $_drop_target} { | |
| if {[string length $_drop_target]} { | |
| ## Call the <<DropLeave>> event. | |
| # debug "\t<<DropLeave>> on $_drop_target" | |
| set cmd [bind $_drop_target <<DropLeave>>] | |
| if {[string length $cmd]} { | |
| set cmd [string map [list %W $_drop_target %X $rootX %Y $rootY \ | |
| %CST \{$_common_drag_source_types\} \ | |
| %CTT \{$_common_drop_target_types\} \ | |
| %CPT \{[lindex [platform_independent_type [lindex $_common_drag_source_types 0]] 0]\} \ | |
| %ST \{$_typelist\} %TT \{$_types\} \ | |
| %A \{$_action\} %a \{$_actionlist\} \ | |
| %b \{$_pressedkeys\} %m \{$_pressedkeys\} \ | |
| %D \{\} %e <<DropLeave>> \ | |
| %L \{$_typelist\} %% % \ | |
| %t \{$_typelist\} %T \{[lindex $_common_drag_source_types 0]\} \ | |
| %c \{$_codelist\} %C \{[lindex $_codelist 0]\} \ | |
| ] $cmd] | |
| uplevel \#0 $cmd | |
| } | |
| } | |
| set _drop_target $drop_target | |
| set _action refuse_drop | |
| if {[llength $common_drag_source_types]} { | |
| set _action [lindex $_actionlist 0] | |
| set _common_drag_source_types $common_drag_source_types | |
| set _common_drop_target_types $common_drop_target_types | |
| ## Drop target supports at least one type. Send a <<DropEnter>>. | |
| # puts "<<DropEnter>> -> $drop_target" | |
| set cmd [bind $drop_target <<DropEnter>>] | |
| if {[string length $cmd]} { | |
| focus $drop_target | |
| set cmd [string map [list %W $drop_target %X $rootX %Y $rootY \ | |
| %CST \{$_common_drag_source_types\} \ | |
| %CTT \{$_common_drop_target_types\} \ | |
| %CPT \{[lindex [platform_independent_type [lindex $_common_drag_source_types 0]] 0]\} \ | |
| %ST \{$_typelist\} %TT \{$_types\} \ | |
| %A $_action %a \{$_actionlist\} \ | |
| %b \{$_pressedkeys\} %m \{$_pressedkeys\} \ | |
| %D [list $data] %e <<DropEnter>> \ | |
| %L \{$_typelist\} %% % \ | |
| %t \{$_typelist\} %T \{[lindex $_common_drag_source_types 0]\} \ | |
| %c \{$_codelist\} %C \{[lindex $_codelist 0]\} \ | |
| ] $cmd] | |
| set _action [uplevel \#0 $cmd] | |
| switch -exact -- $_action { | |
| copy - move - link - ask - private - refuse_drop - default {} | |
| default {set _action copy} | |
| } | |
| } | |
| } | |
| } | |
| set _drop_target {} | |
| if {[llength $common_drag_source_types]} { | |
| set _common_drag_source_types $common_drag_source_types | |
| set _common_drop_target_types $common_drop_target_types | |
| set _drop_target $drop_target | |
| ## Drop target supports at least one type. Send a <<DropPosition>>. | |
| set cmd [bind $drop_target <<DropPosition>>] | |
| if {[string length $cmd]} { | |
| set cmd [string map [list %W $drop_target %X $rootX %Y $rootY \ | |
| %CST \{$_common_drag_source_types\} \ | |
| %CTT \{$_common_drop_target_types\} \ | |
| %CPT \{[lindex [platform_independent_type [lindex $_common_drag_source_types 0]] 0]\} \ | |
| %ST \{$_typelist\} %TT \{$_types\} \ | |
| %A $_action %a \{$_actionlist\} \ | |
| %b \{$_pressedkeys\} %m \{$_pressedkeys\} \ | |
| %D [list $data] %e <<DropPosition>> \ | |
| %L \{$_typelist\} %% % \ | |
| %t \{$_typelist\} %T \{[lindex $_common_drag_source_types 0]\} \ | |
| %c \{$_codelist\} %C \{[lindex $_codelist 0]\} \ | |
| ] $cmd] | |
| set _action [uplevel \#0 $cmd] | |
| } | |
| } | |
| # Return values: copy, move, link, ask, private, refuse_drop, default | |
| # debug "generic::HandlePosition: ACTION: $_action" | |
| switch -exact -- $_action { | |
| copy - move - link - ask - private - refuse_drop - default {} | |
| default {set _action copy} | |
| } | |
| return $_action | |
| };# generic::HandlePosition | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::HandleLeave | |
| # ---------------------------------------------------------------------------- | |
| proc generic::HandleLeave { } { | |
| variable _types | |
| variable _typelist | |
| variable _codelist | |
| variable _actionlist | |
| variable _pressedkeys | |
| variable _action | |
| variable _common_drag_source_types | |
| variable _common_drop_target_types | |
| variable _drag_source | |
| variable _drop_target | |
| variable _last_mouse_root_x | |
| variable _last_mouse_root_y | |
| if {![info exists _drop_target]} {set _drop_target {}} | |
| # debug "generic::HandleLeave: _drop_target=$_drop_target" | |
| if {[info exists _drop_target] && [string length $_drop_target]} { | |
| set cmd [bind $_drop_target <<DropLeave>>] | |
| if {[string length $cmd]} { | |
| set cmd [string map [list %W $_drop_target \ | |
| %X $_last_mouse_root_x %Y $_last_mouse_root_y \ | |
| %CST \{$_common_drag_source_types\} \ | |
| %CTT \{$_common_drop_target_types\} \ | |
| %CPT \{[lindex [platform_independent_type [lindex $_common_drag_source_types 0]] 0]\} \ | |
| %ST \{$_typelist\} %TT \{$_types\} \ | |
| %A \{$_action\} %a \{$_actionlist\} \ | |
| %b \{$_pressedkeys\} %m \{$_pressedkeys\} \ | |
| %D \{\} %e <<DropLeave>> \ | |
| %L \{$_typelist\} %% % \ | |
| %t \{$_typelist\} %T \{[lindex $_common_drag_source_types 0]\} \ | |
| %c \{$_codelist\} %C \{[lindex $_codelist 0]\} \ | |
| ] $cmd] | |
| set _action [uplevel \#0 $cmd] | |
| } | |
| } | |
| foreach var {_types _typelist _actionlist _pressedkeys _action | |
| _common_drag_source_types _common_drop_target_types | |
| _drag_source _drop_target} { | |
| set $var {} | |
| } | |
| };# generic::HandleLeave | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::HandleDrop | |
| # ---------------------------------------------------------------------------- | |
| proc generic::HandleDrop {drop_target drag_source pressedkeys rootX rootY time } { | |
| variable _types | |
| variable _typelist | |
| variable _codelist | |
| variable _actionlist | |
| variable _pressedkeys | |
| variable _action | |
| variable _common_drag_source_types | |
| variable _common_drop_target_types | |
| variable _drag_source | |
| variable _drop_target | |
| variable _last_mouse_root_x | |
| variable _last_mouse_root_y | |
| variable _last_mouse_root_x; set _last_mouse_root_x $rootX | |
| variable _last_mouse_root_y; set _last_mouse_root_y $rootY | |
| set _pressedkeys $pressedkeys | |
| # puts "generic::HandleDrop: $time" | |
| if {![info exists _drag_source] && ![string length $_drag_source]} { | |
| return refuse_drop | |
| } | |
| if {![info exists _drop_target] && ![string length $_drop_target]} { | |
| return refuse_drop | |
| } | |
| if {![llength $_common_drag_source_types]} {return refuse_drop} | |
| ## Get the dropped data. | |
| set data [GetDroppedData $time] | |
| ## Try to select the most specific <<Drop>> event. | |
| foreach type [concat $_common_drag_source_types $_common_drop_target_types] { | |
| set type [platform_independent_type $type] | |
| set cmd [bind $_drop_target <<Drop:$type>>] | |
| if {[string length $cmd]} { | |
| set cmd [string map [list %W $_drop_target %X $rootX %Y $rootY \ | |
| %CST \{$_common_drag_source_types\} \ | |
| %CTT \{$_common_drop_target_types\} \ | |
| %CPT \{[lindex [platform_independent_type [lindex $_common_drag_source_types 0]] 0]\} \ | |
| %ST \{$_typelist\} %TT \{$_types\} \ | |
| %A $_action %a \{$_actionlist\} \ | |
| %b \{$_pressedkeys\} %m \{$_pressedkeys\} \ | |
| %D [list $data] %e <<Drop:$type>> \ | |
| %L \{$_typelist\} %% % \ | |
| %t \{$_typelist\} %T \{[lindex $_common_drag_source_types 0]\} \ | |
| %c \{$_codelist\} %C \{[lindex $_codelist 0]\} \ | |
| ] $cmd] | |
| set _action [uplevel \#0 $cmd] | |
| # Return values: copy, move, link, ask, private, refuse_drop | |
| switch -exact -- $_action { | |
| copy - move - link - ask - private - refuse_drop - default {} | |
| default {set _action copy} | |
| } | |
| return $_action | |
| } | |
| } | |
| set cmd [bind $_drop_target <<Drop>>] | |
| if {[string length $cmd]} { | |
| set cmd [string map [list %W $_drop_target %X $rootX %Y $rootY \ | |
| %CST \{$_common_drag_source_types\} \ | |
| %CTT \{$_common_drop_target_types\} \ | |
| %CPT \{[lindex [platform_independent_type [lindex $_common_drag_source_types 0]] 0]\} \ | |
| %ST \{$_typelist\} %TT \{$_types\} \ | |
| %A $_action %a \{$_actionlist\} \ | |
| %b \{$_pressedkeys\} %m \{$_pressedkeys\} \ | |
| %D [list $data] %e <<Drop>> \ | |
| %L \{$_typelist\} %% % \ | |
| %t \{$_typelist\} %T \{[lindex $_common_drag_source_types 0]\} \ | |
| %c \{$_codelist\} %C \{[lindex $_codelist 0]\} \ | |
| ] $cmd] | |
| set _action [uplevel \#0 $cmd] | |
| } | |
| # Return values: copy, move, link, ask, private, refuse_drop | |
| switch -exact -- $_action { | |
| copy - move - link - ask - private - refuse_drop - default {} | |
| default {set _action copy} | |
| } | |
| return $_action | |
| };# generic::HandleDrop | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::GetWindowCommonTypes | |
| # ---------------------------------------------------------------------------- | |
| proc generic::GetWindowCommonTypes { win typelist } { | |
| set types [bind $win <<DropTargetTypes>>] | |
| # debug ">> Accepted types: $win $_types" | |
| set common_drag_source_types {} | |
| set common_drop_target_types {} | |
| if {[llength $types]} { | |
| ## Examine the drop target types, to find at least one match with the drag | |
| ## source types... | |
| set supported_types [supported_types $typelist] | |
| foreach type $types { | |
| foreach matched [lsearch -glob -all -inline $supported_types $type] { | |
| ## Drop target supports this type. | |
| lappend common_drag_source_types $matched | |
| lappend common_drop_target_types $type | |
| } | |
| } | |
| } | |
| list $common_drag_source_types $common_drop_target_types | |
| };# generic::GetWindowCommonTypes | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::FindWindowWithCommonTypes | |
| # ---------------------------------------------------------------------------- | |
| proc generic::FindWindowWithCommonTypes { win typelist } { | |
| set toplevel [winfo toplevel $win] | |
| while {![string equal $win $toplevel]} { | |
| foreach {common_drag_source_types common_drop_target_types} \ | |
| [GetWindowCommonTypes $win $typelist] {break} | |
| if {[llength $common_drag_source_types]} { | |
| return [list $win $common_drag_source_types $common_drop_target_types] | |
| } | |
| set win [winfo parent $win] | |
| } | |
| ## We have reached the toplevel, which may be also a target (SF Bug #30) | |
| foreach {common_drag_source_types common_drop_target_types} \ | |
| [GetWindowCommonTypes $win $typelist] {break} | |
| if {[llength $common_drag_source_types]} { | |
| return [list $win $common_drag_source_types $common_drop_target_types] | |
| } | |
| return { {} {} {} } | |
| };# generic::FindWindowWithCommonTypes | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::GetDroppedData | |
| # ---------------------------------------------------------------------------- | |
| proc generic::GetDroppedData { time } { | |
| variable _dropped_data | |
| return $_dropped_data | |
| };# generic::GetDroppedData | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::SetDroppedData | |
| # ---------------------------------------------------------------------------- | |
| proc generic::SetDroppedData { data } { | |
| variable _dropped_data | |
| set _dropped_data $data | |
| };# generic::SetDroppedData | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::GetDragSource | |
| # ---------------------------------------------------------------------------- | |
| proc generic::GetDragSource { } { | |
| variable _drag_source | |
| return $_drag_source | |
| };# generic::GetDragSource | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::GetDropTarget | |
| # ---------------------------------------------------------------------------- | |
| proc generic::GetDropTarget { } { | |
| variable _drop_target | |
| return $_drop_target | |
| };# generic::GetDropTarget | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::GetDragSourceCommonTypes | |
| # ---------------------------------------------------------------------------- | |
| proc generic::GetDragSourceCommonTypes { } { | |
| variable _common_drag_source_types | |
| return $_common_drag_source_types | |
| };# generic::GetDragSourceCommonTypes | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::GetDropTargetCommonTypes | |
| # ---------------------------------------------------------------------------- | |
| proc generic::GetDropTargetCommonTypes { } { | |
| variable _common_drag_source_types | |
| return $_common_drag_source_types | |
| };# generic::GetDropTargetCommonTypes | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::platform_specific_types | |
| # ---------------------------------------------------------------------------- | |
| proc generic::platform_specific_types { types } { | |
| set new_types {} | |
| foreach type $types { | |
| set new_types [concat $new_types [platform_specific_type $type]] | |
| } | |
| return $new_types | |
| }; # generic::platform_specific_types | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::platform_specific_type | |
| # ---------------------------------------------------------------------------- | |
| proc generic::platform_specific_type { type } { | |
| variable _tkdnd2platform | |
| if {[dict exists $_tkdnd2platform $type]} { | |
| return [dict get $_tkdnd2platform $type] | |
| } | |
| list $type | |
| }; # generic::platform_specific_type | |
| # ---------------------------------------------------------------------------- | |
| # Command tkdnd::platform_independent_types | |
| # ---------------------------------------------------------------------------- | |
| proc ::tkdnd::platform_independent_types { types } { | |
| set new_types {} | |
| foreach type $types { | |
| set new_types [concat $new_types [platform_independent_type $type]] | |
| } | |
| return $new_types | |
| }; # tkdnd::platform_independent_types | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::platform_independent_type | |
| # ---------------------------------------------------------------------------- | |
| proc generic::platform_independent_type { type } { | |
| variable _platform2tkdnd | |
| if {[dict exists $_platform2tkdnd $type]} { | |
| return [dict get $_platform2tkdnd $type] | |
| } | |
| return $type | |
| }; # generic::platform_independent_type | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::supported_types | |
| # ---------------------------------------------------------------------------- | |
| proc generic::supported_types { types } { | |
| set new_types {} | |
| foreach type $types { | |
| if {[supported_type $type]} {lappend new_types $type} | |
| } | |
| return $new_types | |
| }; # generic::supported_types | |
| # ---------------------------------------------------------------------------- | |
| # Command generic::supported_type | |
| # ---------------------------------------------------------------------------- | |
| proc generic::supported_type { type } { | |
| variable _platform2tkdnd | |
| if {[dict exists $_platform2tkdnd $type]} { | |
| return 1 | |
| } | |
| return 0 | |
| }; # generic::supported_type | |