File size: 6,231 Bytes
2809163
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
#
# tkdnd_compat.tcl --
# 
#    This file implements some utility procedures, to support older versions
#    of 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 compat {

};# namespace compat

# ----------------------------------------------------------------------------
#  Command ::dnd
# ----------------------------------------------------------------------------
proc ::dnd {method window args} {
  switch $method {
    bindtarget {
      switch [llength $args] {
        0 {return [tkdnd::compat::bindtarget0 $window]}
        1 {return [tkdnd::compat::bindtarget1 $window [lindex $args 0]]}
        2 {return [tkdnd::compat::bindtarget2 $window [lindex $args 0] \
                                                      [lindex $args 1]]}
        3 {return [tkdnd::compat::bindtarget3 $window [lindex $args 0] \
                                     [lindex $args 1] [lindex $args 2]]}
        4 {return [tkdnd::compat::bindtarget4 $window [lindex $args 0] \
                    [lindex $args 1] [lindex $args 2] [lindex $args 3]]}
      }
    }
    cleartarget {
      return [tkdnd::compat::cleartarget $window]
    }
    bindsource {
      switch [llength $args] {
        0 {return [tkdnd::compat::bindsource0 $window]}
        1 {return [tkdnd::compat::bindsource1 $window [lindex $args 0]]}
        2 {return [tkdnd::compat::bindsource2 $window [lindex $args 0] \
                                                      [lindex $args 1]]}
        3 {return [tkdnd::compat::bindsource3 $window [lindex $args 0] \
                                     [lindex $args 1] [lindex $args 2]]}
      }
    }
    clearsource {
      return [tkdnd::compat::clearsource $window]
    }
    drag {
      return [tkdnd::_init_drag 1 $window "press" 0 0 0 0]
    }
  }
  error "invalid number of arguments!"
};# ::dnd

# ----------------------------------------------------------------------------
#  Command compat::bindtarget
# ----------------------------------------------------------------------------
proc compat::bindtarget0 {window} {
  return [bind $window <<DropTargetTypes>>]
};# compat::bindtarget0

proc compat::bindtarget1 {window type} {
  return [bindtarget2 $window $type <Drop>]
};# compat::bindtarget1

proc compat::bindtarget2 {window type event} {
  switch $event {
    <DragEnter> {return [bind $window <<DropEnter>>]}
    <Drag>      {return [bind $window <<DropPosition>>]}
    <DragLeave> {return [bind $window <<DropLeave>>]}
    <Drop>      {return [bind $window <<Drop>>]}
  }
};# compat::bindtarget2

proc compat::bindtarget3 {window type event script} {
  set type [normalise_type $type]
  ::tkdnd::drop_target register $window [list $type]
  switch $event {
    <DragEnter> {return [bind $window <<DropEnter>> $script]}
    <Drag>      {return [bind $window <<DropPosition>> $script]}
    <DragLeave> {return [bind $window <<DropLeave>> $script]}
    <Drop>      {return [bind $window <<Drop>> $script]}
  }
};# compat::bindtarget3

proc compat::bindtarget4 {window type event script priority} {
  return [bindtarget3 $window $type $event $script]
};# compat::bindtarget4

proc compat::normalise_type { type } {
  switch $type {
    text/plain -
    {text/plain;charset=UTF-8} -
    Text                       {return DND_Text}
    text/uri-list -
    Files                      {return DND_Files}
    default                    {return $type}
  }
};# compat::normalise_type

# ----------------------------------------------------------------------------
#  Command compat::bindsource
# ----------------------------------------------------------------------------
proc compat::bindsource0 {window} {
  return [bind $window <<DropTargetTypes>>]
};# compat::bindsource0

proc compat::bindsource1 {window type} {
  return [bindsource2 $window $type <Drop>]
};# compat::bindsource1

proc compat::bindsource2 {window type script} {
  set type [normalise_type $type]
  ::tkdnd::drag_source register $window $type
  bind $window <<DragInitCmd>> "list {copy} {%t} \[$script\]"
};# compat::bindsource2

proc compat::bindsource3 {window type script priority} {
  return [bindsource2 $window $type $script]
};# compat::bindsource3

# ----------------------------------------------------------------------------
#  Command compat::cleartarget
# ----------------------------------------------------------------------------
proc compat::cleartarget {window} {
};# compat::cleartarget

# ----------------------------------------------------------------------------
#  Command compat::clearsource
# ----------------------------------------------------------------------------
proc compat::clearsource {window} {
};# compat::clearsource