1 | # entry.tcl -- |
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2 | # |
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3 | # This file defines the default bindings for Tk entry widgets and provides |
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4 | # procedures that help in implementing those bindings. |
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5 | # |
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6 | # RCS: @(#) $Id: entry.tcl,v 1.21 2003/01/23 23:30:11 drh Exp $ |
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7 | # |
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8 | # Copyright (c) 1992-1994 The Regents of the University of California. |
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9 | # Copyright (c) 1994-1997 Sun Microsystems, Inc. |
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10 | # |
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11 | # See the file "license.terms" for information on usage and redistribution |
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12 | # of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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13 | # |
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14 | |
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15 | #------------------------------------------------------------------------- |
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16 | # Elements of tk::Priv that are used in this file: |
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17 | # |
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18 | # afterId - If non-null, it means that auto-scanning is underway |
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19 | # and it gives the "after" id for the next auto-scan |
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20 | # command to be executed. |
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21 | # mouseMoved - Non-zero means the mouse has moved a significant |
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22 | # amount since the button went down (so, for example, |
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23 | # start dragging out a selection). |
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24 | # pressX - X-coordinate at which the mouse button was pressed. |
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25 | # selectMode - The style of selection currently underway: |
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26 | # char, word, or line. |
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27 | # x, y - Last known mouse coordinates for scanning |
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28 | # and auto-scanning. |
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29 | # data - Used for Cut and Copy |
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30 | #------------------------------------------------------------------------- |
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31 | |
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32 | #------------------------------------------------------------------------- |
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33 | # The code below creates the default class bindings for entries. |
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34 | #------------------------------------------------------------------------- |
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35 | bind Entry <<Cut>> { |
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36 | if {![catch {tk::EntryGetSelection %W} tk::Priv(data)]} { |
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37 | clipboard clear -displayof %W |
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38 | clipboard append -displayof %W $tk::Priv(data) |
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39 | %W delete sel.first sel.last |
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40 | unset tk::Priv(data) |
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41 | } |
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42 | } |
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43 | bind Entry <<Copy>> { |
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44 | if {![catch {tk::EntryGetSelection %W} tk::Priv(data)]} { |
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45 | clipboard clear -displayof %W |
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46 | clipboard append -displayof %W $tk::Priv(data) |
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47 | unset tk::Priv(data) |
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48 | } |
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49 | } |
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50 | bind Entry <<Paste>> { |
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51 | global tcl_platform |
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52 | catch { |
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53 | if {[string compare [tk windowingsystem] "x11"]} { |
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54 | catch { |
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55 | %W delete sel.first sel.last |
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56 | } |
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57 | } |
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58 | %W insert insert [::tk::GetSelection %W CLIPBOARD] |
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59 | tk::EntrySeeInsert %W |
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60 | } |
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61 | } |
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62 | bind Entry <<Clear>> { |
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63 | %W delete sel.first sel.last |
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64 | } |
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65 | bind Entry <<PasteSelection>> { |
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66 | if {$tk_strictMotif || ![info exists tk::Priv(mouseMoved)] |
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67 | || !$tk::Priv(mouseMoved)} { |
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68 | tk::EntryPaste %W %x |
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69 | } |
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70 | } |
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71 | |
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72 | # Standard Motif bindings: |
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73 | |
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74 | bind Entry <1> { |
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75 | tk::EntryButton1 %W %x |
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76 | %W selection clear |
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77 | } |
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78 | bind Entry <B1-Motion> { |
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79 | set tk::Priv(x) %x |
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80 | tk::EntryMouseSelect %W %x |
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81 | } |
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82 | bind Entry <Double-1> { |
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83 | set tk::Priv(selectMode) word |
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84 | tk::EntryMouseSelect %W %x |
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85 | catch {%W icursor sel.last} |
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86 | } |
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87 | bind Entry <Triple-1> { |
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88 | set tk::Priv(selectMode) line |
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89 | tk::EntryMouseSelect %W %x |
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90 | catch {%W icursor sel.last} |
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91 | } |
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92 | bind Entry <Shift-1> { |
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93 | set tk::Priv(selectMode) char |
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94 | %W selection adjust @%x |
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95 | } |
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96 | bind Entry <Double-Shift-1> { |
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97 | set tk::Priv(selectMode) word |
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98 | tk::EntryMouseSelect %W %x |
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99 | } |
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100 | bind Entry <Triple-Shift-1> { |
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101 | set tk::Priv(selectMode) line |
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102 | tk::EntryMouseSelect %W %x |
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103 | } |
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104 | bind Entry <B1-Leave> { |
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105 | set tk::Priv(x) %x |
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106 | tk::EntryAutoScan %W |
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107 | } |
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108 | bind Entry <B1-Enter> { |
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109 | tk::CancelRepeat |
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110 | } |
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111 | bind Entry <ButtonRelease-1> { |
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112 | tk::CancelRepeat |
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113 | } |
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114 | bind Entry <Control-1> { |
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115 | %W icursor @%x |
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116 | } |
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117 | |
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118 | bind Entry <Left> { |
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119 | tk::EntrySetCursor %W [expr {[%W index insert] - 1}] |
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120 | } |
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121 | bind Entry <Right> { |
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122 | tk::EntrySetCursor %W [expr {[%W index insert] + 1}] |
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123 | } |
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124 | bind Entry <Shift-Left> { |
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125 | tk::EntryKeySelect %W [expr {[%W index insert] - 1}] |
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126 | tk::EntrySeeInsert %W |
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127 | } |
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128 | bind Entry <Shift-Right> { |
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129 | tk::EntryKeySelect %W [expr {[%W index insert] + 1}] |
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130 | tk::EntrySeeInsert %W |
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131 | } |
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132 | bind Entry <Control-Left> { |
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133 | tk::EntrySetCursor %W [tk::EntryPreviousWord %W insert] |
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134 | } |
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135 | bind Entry <Control-Right> { |
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136 | tk::EntrySetCursor %W [tk::EntryNextWord %W insert] |
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137 | } |
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138 | bind Entry <Shift-Control-Left> { |
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139 | tk::EntryKeySelect %W [tk::EntryPreviousWord %W insert] |
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140 | tk::EntrySeeInsert %W |
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141 | } |
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142 | bind Entry <Shift-Control-Right> { |
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143 | tk::EntryKeySelect %W [tk::EntryNextWord %W insert] |
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144 | tk::EntrySeeInsert %W |
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145 | } |
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146 | bind Entry <Home> { |
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147 | tk::EntrySetCursor %W 0 |
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148 | } |
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149 | bind Entry <Shift-Home> { |
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150 | tk::EntryKeySelect %W 0 |
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151 | tk::EntrySeeInsert %W |
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152 | } |
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153 | bind Entry <End> { |
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154 | tk::EntrySetCursor %W end |
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155 | } |
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156 | bind Entry <Shift-End> { |
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157 | tk::EntryKeySelect %W end |
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158 | tk::EntrySeeInsert %W |
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159 | } |
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160 | |
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161 | bind Entry <Delete> { |
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162 | if {[%W selection present]} { |
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163 | %W delete sel.first sel.last |
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164 | } else { |
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165 | %W delete insert |
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166 | } |
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167 | } |
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168 | bind Entry <BackSpace> { |
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169 | tk::EntryBackspace %W |
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170 | } |
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171 | |
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172 | bind Entry <Control-space> { |
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173 | %W selection from insert |
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174 | } |
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175 | bind Entry <Select> { |
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176 | %W selection from insert |
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177 | } |
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178 | bind Entry <Control-Shift-space> { |
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179 | %W selection adjust insert |
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180 | } |
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181 | bind Entry <Shift-Select> { |
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182 | %W selection adjust insert |
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183 | } |
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184 | bind Entry <Control-slash> { |
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185 | %W selection range 0 end |
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186 | } |
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187 | bind Entry <Control-backslash> { |
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188 | %W selection clear |
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189 | } |
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190 | bind Entry <KeyPress> { |
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191 | tk::CancelRepeat |
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192 | tk::EntryInsert %W %A |
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193 | } |
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194 | |
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195 | # Ignore all Alt, Meta, and Control keypresses unless explicitly bound. |
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196 | # Otherwise, if a widget binding for one of these is defined, the |
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197 | # <KeyPress> class binding will also fire and insert the character, |
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198 | # which is wrong. Ditto for Escape, Return, and Tab. |
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199 | |
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200 | bind Entry <Alt-KeyPress> {# nothing} |
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201 | bind Entry <Meta-KeyPress> {# nothing} |
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202 | bind Entry <Control-KeyPress> {# nothing} |
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203 | bind Entry <Escape> {# nothing} |
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204 | bind Entry <Return> {# nothing} |
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205 | bind Entry <KP_Enter> {# nothing} |
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206 | bind Entry <Tab> {# nothing} |
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207 | if {[string equal [tk windowingsystem] "classic"] |
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208 | || [string equal [tk windowingsystem] "aqua"]} { |
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209 | bind Entry <Command-KeyPress> {# nothing} |
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210 | } |
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211 | |
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212 | # On Windows, paste is done using Shift-Insert. Shift-Insert already |
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213 | # generates the <<Paste>> event, so we don't need to do anything here. |
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214 | if {[string compare $tcl_platform(platform) "windows"]} { |
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215 | bind Entry <Insert> { |
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216 | catch {tk::EntryInsert %W [::tk::GetSelection %W PRIMARY]} |
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217 | } |
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218 | } |
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219 | |
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220 | # Additional emacs-like bindings: |
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221 | |
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222 | bind Entry <Control-a> { |
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223 | if {!$tk_strictMotif} { |
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224 | tk::EntrySetCursor %W 0 |
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225 | } |
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226 | } |
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227 | bind Entry <Control-b> { |
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228 | if {!$tk_strictMotif} { |
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229 | tk::EntrySetCursor %W [expr {[%W index insert] - 1}] |
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230 | } |
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231 | } |
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232 | bind Entry <Control-d> { |
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233 | if {!$tk_strictMotif} { |
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234 | %W delete insert |
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235 | } |
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236 | } |
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237 | bind Entry <Control-e> { |
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238 | if {!$tk_strictMotif} { |
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239 | tk::EntrySetCursor %W end |
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240 | } |
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241 | } |
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242 | bind Entry <Control-f> { |
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243 | if {!$tk_strictMotif} { |
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244 | tk::EntrySetCursor %W [expr {[%W index insert] + 1}] |
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245 | } |
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246 | } |
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247 | bind Entry <Control-h> { |
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248 | if {!$tk_strictMotif} { |
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249 | tk::EntryBackspace %W |
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250 | } |
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251 | } |
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252 | bind Entry <Control-k> { |
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253 | if {!$tk_strictMotif} { |
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254 | %W delete insert end |
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255 | } |
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256 | } |
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257 | bind Entry <Control-t> { |
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258 | if {!$tk_strictMotif} { |
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259 | tk::EntryTranspose %W |
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260 | } |
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261 | } |
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262 | bind Entry <Meta-b> { |
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263 | if {!$tk_strictMotif} { |
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264 | tk::EntrySetCursor %W [tk::EntryPreviousWord %W insert] |
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265 | } |
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266 | } |
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267 | bind Entry <Meta-d> { |
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268 | if {!$tk_strictMotif} { |
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269 | %W delete insert [tk::EntryNextWord %W insert] |
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270 | } |
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271 | } |
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272 | bind Entry <Meta-f> { |
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273 | if {!$tk_strictMotif} { |
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274 | tk::EntrySetCursor %W [tk::EntryNextWord %W insert] |
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275 | } |
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276 | } |
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277 | bind Entry <Meta-BackSpace> { |
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278 | if {!$tk_strictMotif} { |
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279 | %W delete [tk::EntryPreviousWord %W insert] insert |
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280 | } |
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281 | } |
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282 | bind Entry <Meta-Delete> { |
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283 | if {!$tk_strictMotif} { |
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284 | %W delete [tk::EntryPreviousWord %W insert] insert |
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285 | } |
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286 | } |
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287 | |
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288 | # A few additional bindings of my own. |
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289 | |
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290 | bind Entry <2> { |
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291 | if {!$tk_strictMotif} { |
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292 | ::tk::EntryScanMark %W %x |
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293 | } |
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294 | } |
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295 | bind Entry <B2-Motion> { |
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296 | if {!$tk_strictMotif} { |
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297 | ::tk::EntryScanDrag %W %x |
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298 | } |
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299 | } |
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300 | |
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301 | # ::tk::EntryClosestGap -- |
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302 | # Given x and y coordinates, this procedure finds the closest boundary |
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303 | # between characters to the given coordinates and returns the index |
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304 | # of the character just after the boundary. |
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305 | # |
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306 | # Arguments: |
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307 | # w - The entry window. |
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308 | # x - X-coordinate within the window. |
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309 | |
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310 | proc ::tk::EntryClosestGap {w x} { |
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311 | set pos [$w index @$x] |
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312 | set bbox [$w bbox $pos] |
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313 | if {($x - [lindex $bbox 0]) < ([lindex $bbox 2]/2)} { |
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314 | return $pos |
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315 | } |
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316 | incr pos |
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317 | } |
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318 | |
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319 | # ::tk::EntryButton1 -- |
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320 | # This procedure is invoked to handle button-1 presses in entry |
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321 | # widgets. It moves the insertion cursor, sets the selection anchor, |
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322 | # and claims the input focus. |
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323 | # |
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324 | # Arguments: |
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325 | # w - The entry window in which the button was pressed. |
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326 | # x - The x-coordinate of the button press. |
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327 | |
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328 | proc ::tk::EntryButton1 {w x} { |
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329 | variable ::tk::Priv |
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330 | |
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331 | set Priv(selectMode) char |
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332 | set Priv(mouseMoved) 0 |
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333 | set Priv(pressX) $x |
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334 | $w icursor [EntryClosestGap $w $x] |
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335 | $w selection from insert |
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336 | if {[string compare "disabled" [$w cget -state]]} {focus $w} |
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337 | } |
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338 | |
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339 | # ::tk::EntryMouseSelect -- |
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340 | # This procedure is invoked when dragging out a selection with |
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341 | # the mouse. Depending on the selection mode (character, word, |
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342 | # line) it selects in different-sized units. This procedure |
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343 | # ignores mouse motions initially until the mouse has moved from |
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344 | # one character to another or until there have been multiple clicks. |
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345 | # |
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346 | # Arguments: |
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347 | # w - The entry window in which the button was pressed. |
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348 | # x - The x-coordinate of the mouse. |
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349 | |
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350 | proc ::tk::EntryMouseSelect {w x} { |
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351 | variable ::tk::Priv |
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352 | |
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353 | set cur [EntryClosestGap $w $x] |
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354 | set anchor [$w index anchor] |
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355 | if {($cur != $anchor) || (abs($Priv(pressX) - $x) >= 3)} { |
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356 | set Priv(mouseMoved) 1 |
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357 | } |
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358 | switch $Priv(selectMode) { |
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359 | char { |
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360 | if {$Priv(mouseMoved)} { |
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361 | if {$cur < $anchor} { |
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362 | $w selection range $cur $anchor |
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363 | } elseif {$cur > $anchor} { |
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364 | $w selection range $anchor $cur |
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365 | } else { |
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366 | $w selection clear |
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367 | } |
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368 | } |
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369 | } |
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370 | word { |
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371 | if {$cur < [$w index anchor]} { |
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372 | set before [tcl_wordBreakBefore [$w get] $cur] |
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373 | set after [tcl_wordBreakAfter [$w get] [expr {$anchor-1}]] |
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374 | } else { |
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375 | set before [tcl_wordBreakBefore [$w get] $anchor] |
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376 | set after [tcl_wordBreakAfter [$w get] [expr {$cur - 1}]] |
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377 | } |
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378 | if {$before < 0} { |
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379 | set before 0 |
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380 | } |
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381 | if {$after < 0} { |
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382 | set after end |
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383 | } |
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384 | $w selection range $before $after |
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385 | } |
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386 | line { |
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387 | $w selection range 0 end |
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388 | } |
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389 | } |
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390 | if {$Priv(mouseMoved)} { |
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391 | $w icursor $cur |
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392 | } |
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393 | update idletasks |
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394 | } |
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395 | |
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396 | # ::tk::EntryPaste -- |
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397 | # This procedure sets the insertion cursor to the current mouse position, |
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398 | # pastes the selection there, and sets the focus to the window. |
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399 | # |
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400 | # Arguments: |
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401 | # w - The entry window. |
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402 | # x - X position of the mouse. |
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403 | |
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404 | proc ::tk::EntryPaste {w x} { |
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405 | $w icursor [EntryClosestGap $w $x] |
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406 | catch {$w insert insert [::tk::GetSelection $w PRIMARY]} |
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407 | if {[string compare "disabled" [$w cget -state]]} {focus $w} |
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408 | } |
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409 | |
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410 | # ::tk::EntryAutoScan -- |
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411 | # This procedure is invoked when the mouse leaves an entry window |
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412 | # with button 1 down. It scrolls the window left or right, |
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413 | # depending on where the mouse is, and reschedules itself as an |
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414 | # "after" command so that the window continues to scroll until the |
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415 | # mouse moves back into the window or the mouse button is released. |
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416 | # |
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417 | # Arguments: |
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418 | # w - The entry window. |
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419 | |
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420 | proc ::tk::EntryAutoScan {w} { |
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421 | variable ::tk::Priv |
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422 | set x $Priv(x) |
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423 | if {![winfo exists $w]} return |
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424 | if {$x >= [winfo width $w]} { |
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425 | $w xview scroll 2 units |
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426 | EntryMouseSelect $w $x |
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427 | } elseif {$x < 0} { |
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428 | $w xview scroll -2 units |
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429 | EntryMouseSelect $w $x |
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430 | } |
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431 | set Priv(afterId) [after 50 [list tk::EntryAutoScan $w]] |
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432 | } |
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433 | |
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434 | # ::tk::EntryKeySelect -- |
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435 | # This procedure is invoked when stroking out selections using the |
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436 | # keyboard. It moves the cursor to a new position, then extends |
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437 | # the selection to that position. |
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438 | # |
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439 | # Arguments: |
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440 | # w - The entry window. |
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441 | # new - A new position for the insertion cursor (the cursor hasn't |
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442 | # actually been moved to this position yet). |
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443 | |
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444 | proc ::tk::EntryKeySelect {w new} { |
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445 | if {![$w selection present]} { |
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446 | $w selection from insert |
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447 | $w selection to $new |
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448 | } else { |
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449 | $w selection adjust $new |
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450 | } |
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451 | $w icursor $new |
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452 | } |
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453 | |
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454 | # ::tk::EntryInsert -- |
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455 | # Insert a string into an entry at the point of the insertion cursor. |
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456 | # If there is a selection in the entry, and it covers the point of the |
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457 | # insertion cursor, then delete the selection before inserting. |
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458 | # |
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459 | # Arguments: |
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460 | # w - The entry window in which to insert the string |
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461 | # s - The string to insert (usually just a single character) |
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462 | |
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463 | proc ::tk::EntryInsert {w s} { |
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464 | if {[string equal $s ""]} { |
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465 | return |
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466 | } |
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467 | catch { |
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468 | set insert [$w index insert] |
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469 | if {([$w index sel.first] <= $insert) |
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470 | && ([$w index sel.last] >= $insert)} { |
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471 | $w delete sel.first sel.last |
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472 | } |
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473 | } |
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474 | $w insert insert $s |
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475 | EntrySeeInsert $w |
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476 | } |
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477 | |
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478 | # ::tk::EntryBackspace -- |
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479 | # Backspace over the character just before the insertion cursor. |
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480 | # If backspacing would move the cursor off the left edge of the |
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481 | # window, reposition the cursor at about the middle of the window. |
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482 | # |
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483 | # Arguments: |
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484 | # w - The entry window in which to backspace. |
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485 | |
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486 | proc ::tk::EntryBackspace w { |
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487 | if {[$w selection present]} { |
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488 | $w delete sel.first sel.last |
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489 | } else { |
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490 | set x [expr {[$w index insert] - 1}] |
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491 | if {$x >= 0} {$w delete $x} |
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492 | if {[$w index @0] >= [$w index insert]} { |
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493 | set range [$w xview] |
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494 | set left [lindex $range 0] |
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495 | set right [lindex $range 1] |
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496 | $w xview moveto [expr {$left - ($right - $left)/2.0}] |
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497 | } |
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498 | } |
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499 | } |
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500 | |
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501 | # ::tk::EntrySeeInsert -- |
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502 | # Make sure that the insertion cursor is visible in the entry window. |
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503 | # If not, adjust the view so that it is. |
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504 | # |
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505 | # Arguments: |
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506 | # w - The entry window. |
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507 | |
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508 | proc ::tk::EntrySeeInsert w { |
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509 | set c [$w index insert] |
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510 | if {($c < [$w index @0]) || ($c > [$w index @[winfo width $w]])} { |
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511 | $w xview $c |
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512 | } |
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513 | } |
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514 | |
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515 | # ::tk::EntrySetCursor - |
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516 | # Move the insertion cursor to a given position in an entry. Also |
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517 | # clears the selection, if there is one in the entry, and makes sure |
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518 | # that the insertion cursor is visible. |
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519 | # |
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520 | # Arguments: |
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521 | # w - The entry window. |
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522 | # pos - The desired new position for the cursor in the window. |
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523 | |
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524 | proc ::tk::EntrySetCursor {w pos} { |
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525 | $w icursor $pos |
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526 | $w selection clear |
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527 | EntrySeeInsert $w |
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528 | } |
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529 | |
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530 | # ::tk::EntryTranspose - |
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531 | # This procedure implements the "transpose" function for entry widgets. |
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532 | # It tranposes the characters on either side of the insertion cursor, |
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533 | # unless the cursor is at the end of the line. In this case it |
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534 | # transposes the two characters to the left of the cursor. In either |
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535 | # case, the cursor ends up to the right of the transposed characters. |
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536 | # |
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537 | # Arguments: |
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538 | # w - The entry window. |
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539 | |
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540 | proc ::tk::EntryTranspose w { |
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541 | set i [$w index insert] |
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542 | if {$i < [$w index end]} { |
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543 | incr i |
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544 | } |
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545 | set first [expr {$i-2}] |
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546 | if {$first < 0} { |
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547 | return |
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548 | } |
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549 | set data [$w get] |
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550 | set new [string index $data [expr {$i-1}]][string index $data $first] |
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551 | $w delete $first $i |
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552 | $w insert insert $new |
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553 | EntrySeeInsert $w |
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554 | } |
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555 | |
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556 | # ::tk::EntryNextWord -- |
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557 | # Returns the index of the next word position after a given position in the |
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558 | # entry. The next word is platform dependent and may be either the next |
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559 | # end-of-word position or the next start-of-word position after the next |
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560 | # end-of-word position. |
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561 | # |
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562 | # Arguments: |
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563 | # w - The entry window in which the cursor is to move. |
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564 | # start - Position at which to start search. |
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565 | |
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566 | if {[string equal $tcl_platform(platform) "windows"]} { |
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567 | proc ::tk::EntryNextWord {w start} { |
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568 | set pos [tcl_endOfWord [$w get] [$w index $start]] |
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569 | if {$pos >= 0} { |
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570 | set pos [tcl_startOfNextWord [$w get] $pos] |
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571 | } |
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572 | if {$pos < 0} { |
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573 | return end |
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574 | } |
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575 | return $pos |
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576 | } |
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577 | } else { |
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578 | proc ::tk::EntryNextWord {w start} { |
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579 | set pos [tcl_endOfWord [$w get] [$w index $start]] |
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580 | if {$pos < 0} { |
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581 | return end |
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582 | } |
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583 | return $pos |
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584 | } |
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585 | } |
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586 | |
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587 | # ::tk::EntryPreviousWord -- |
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588 | # |
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589 | # Returns the index of the previous word position before a given |
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590 | # position in the entry. |
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591 | # |
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592 | # Arguments: |
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593 | # w - The entry window in which the cursor is to move. |
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594 | # start - Position at which to start search. |
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595 | |
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596 | proc ::tk::EntryPreviousWord {w start} { |
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597 | set pos [tcl_startOfPreviousWord [$w get] [$w index $start]] |
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598 | if {$pos < 0} { |
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599 | return 0 |
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600 | } |
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601 | return $pos |
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602 | } |
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603 | |
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604 | # ::tk::EntryScanMark -- |
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605 | # |
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606 | # Marks the start of a possible scan drag operation |
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607 | # |
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608 | # Arguments: |
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609 | # w - The entry window from which the text to get |
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610 | # x - x location on screen |
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611 | |
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612 | proc ::tk::EntryScanMark {w x} { |
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613 | $w scan mark $x |
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614 | set ::tk::Priv(x) $x |
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615 | set ::tk::Priv(y) 0 ; # not used |
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616 | set ::tk::Priv(mouseMoved) 0 |
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617 | } |
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618 | |
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619 | # ::tk::EntryScanDrag -- |
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620 | # |
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621 | # Marks the start of a possible scan drag operation |
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622 | # |
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623 | # Arguments: |
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624 | # w - The entry window from which the text to get |
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625 | # x - x location on screen |
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626 | |
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627 | proc ::tk::EntryScanDrag {w x} { |
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628 | # Make sure these exist, as some weird situations can trigger the |
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629 | # motion binding without the initial press. [Bug #220269] |
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630 | if {![info exists ::tk::Priv(x)]} { set ::tk::Priv(x) $x } |
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631 | # allow for a delta |
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632 | if {abs($x-$::tk::Priv(x)) > 2} { |
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633 | set ::tk::Priv(mouseMoved) 1 |
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634 | } |
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635 | $w scan dragto $x |
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636 | } |
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637 | |
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638 | # ::tk::EntryGetSelection -- |
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639 | # |
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640 | # Returns the selected text of the entry with respect to the -show option. |
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641 | # |
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642 | # Arguments: |
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643 | # w - The entry window from which the text to get |
---|
644 | |
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645 | proc ::tk::EntryGetSelection {w} { |
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646 | set entryString [string range [$w get] [$w index sel.first] \ |
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647 | [expr {[$w index sel.last] - 1}]] |
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648 | if {[string compare [$w cget -show] ""]} { |
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649 | return [string repeat [string index [$w cget -show] 0] \ |
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650 | [string length $entryString]] |
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651 | } |
---|
652 | return $entryString |
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653 | } |
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