Mercurial > vim
annotate runtime/doc/popup.txt @ 16724:6030631a1541 v8.1.1364
patch 8.1.1364: design for popup window support needs more details
commit https://github.com/vim/vim/commit/5c017b2de28d19dfa4af58b8973e32f31bb1477e
Author: Bram Moolenaar <Bram@vim.org>
Date: Tue May 21 23:09:01 2019 +0200
patch 8.1.1364: design for popup window support needs more details
Problem: Design for popup window support needs more details.
Solution: Add details about using a window and buffer. Rename popup_show()
to popup_create() and add popup_show() and popup_hide().
author | Bram Moolenaar <Bram@vim.org> |
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date | Tue, 21 May 2019 23:15:05 +0200 |
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1 *popup.txt* For Vim version 8.1. Last change: 2019 May 21 |
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4 VIM REFERENCE MANUAL by Bram Moolenaar |
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7 Displaying text in floating window. *popup* *popup-window* |
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8 |
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9 THIS IS UNDER DESIGN - ANYTHING MAY STILL CHANGE |
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10 |
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11 1. Introduction |popup-intro| |
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12 2. Functions |popup-functions| |
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13 3. Examples |popup-examples| |
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14 |
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15 |
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16 {not available if the |+eval| feature was disabled at compile time} |
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17 {not able to use text properties if the |+textprop| feature was disabled at |
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18 compile time} |
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19 |
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20 ============================================================================== |
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21 1. Introduction *popup-intro* |
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22 |
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23 We are talking about popup windows here, text that goes on top of the regular |
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24 windows and is under control of a plugin. You cannot edit the text in the |
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25 popup window like with regular windows. |
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26 |
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27 A popup window can be used for such things as: |
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28 - briefly show a message without changing the command line |
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29 - prompt the user with a dialog |
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30 - display information while typing |
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31 - give extra information for auto-completion |
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32 |
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33 The text in the popup window can be colored with |text-properties|. It is |
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34 also possible to use syntax highlighting. |
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35 |
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36 A popup window has a window-ID like other windows, but behaves differently. |
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37 The size can be up to the whole Vim window and it overlaps other windows. |
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38 It contains a buffer, and that buffer is always associated with the popup |
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39 window. The window cannot be used in Normal, Visual or Insert mode, it does |
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40 not get keyboard focus. You can use functions like `setbufline()` to change |
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41 the text in the buffer. There are more differences from how this window and |
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42 buffer behave compared to regular windows and buffers, see |popup-buffer|. |
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43 |
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44 If this is not what you are looking for, check out other popup functionality: |
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45 - popup menu, see |popup-menu| |
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46 - balloon, see |balloon-eval| |
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47 |
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48 |
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49 TODO: |
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50 |
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51 Example how to use syntax highlighting of a code snippet. |
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52 |
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53 Scrolling: When the screen scrolls up for output of an Ex command, what |
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54 happens with popups? |
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55 1. Stay where they are. Problem: listed text may go behind and can't be read. |
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56 2. Scroll with the page. What if they get updated? Either postpone, or take |
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57 the scroll offset into account. |
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58 Probably 2. is the best choice. |
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59 |
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60 Positioning relative to the popup-menu to avoid overlapping with it; add a |
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61 function to get the position and size of the popup-menu. |
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62 |
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63 |
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64 IMPLEMENTATION: |
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65 - Put code in popupwin.c |
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66 - Use win_update() for displaying |
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67 - At first redraw all windows NOT_VALID when the popup moves or hides. |
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68 - At first always display the popup windows at the end of update_screen(), |
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69 lowest zindex first. |
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70 - Later make it more efficient and avoid flicker |
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71 - Use a separate list of windows, one for each tab and one global. Also put |
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72 "aucmd_win" in there. |
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73 - add optional {buf} command to execute(). Only works for a buffer that is |
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74 visible in a window in the current tab or in a popup window. |
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75 E.g. for execute('syntax enable', 'silent', bufnr) |
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76 |
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77 |
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78 ============================================================================== |
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79 2. Functions *popup-functions* |
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80 |
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81 THIS IS UNDER DESIGN - ANYTHING MAY STILL CHANGE |
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82 |
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83 Proposal and discussion on issue #4063: https://github.com/vim/vim/issues/4063 |
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84 |
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85 [functions to be moved to eval.txt later, keep list of functions here] |
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86 |
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87 popup_create({text}, {options}) *popup_create()* |
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88 Open a popup window showing {text}, which is either: |
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89 - a string |
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90 - a list of strings |
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91 - a list of text lines with text properties |
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92 {options} is a dictionary with many possible entries. |
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93 See |popup_create-usage| for details. |
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94 |
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95 Returns a window-ID, which can be used with other popup |
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96 functions. Use `winbufnr()` to get the number of the buffer |
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97 in the window: > |
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98 let winid = popup_create('hello', {}) |
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99 let bufnr = winbufnr(winid) |
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100 call setbufline(bufnr, 2, 'second line') |
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101 |
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102 |
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103 popup_dialog({text}, {options}) *popup_dialog()* |
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104 Just like |popup_create()| but with these default options: > |
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105 call popup_create({text}, { |
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106 \ 'pos': 'center', |
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107 \ 'zindex': 200, |
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108 \ 'border': [], |
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109 \}) |
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110 < Use {options} to change the properties. |
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111 |
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112 |
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113 popup_notification({text}, {options}) *popup_notification()* |
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114 Show the {text} for 3 seconds at the top of the Vim window. |
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115 This works like: > |
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116 call popup_create({text}, { |
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117 \ 'line': 1, |
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118 \ 'col': 10, |
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119 \ 'time': 3000, |
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120 \ 'tab': -1, |
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121 \ 'zindex': 200, |
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122 \ 'highlight': 'WarningMsg', |
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123 \ 'border: [], |
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124 \ }) |
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125 < Use {options} to change the properties. |
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126 |
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127 |
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128 popup_atcursor({text}, {options}) *popup_atcursor()* |
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129 Show the {text} above the cursor, and close it when the cursor |
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130 moves. This works like: > |
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131 call popup_create({text}, { |
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132 \ 'line': 'cursor-1', |
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133 \ 'col': 'cursor', |
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134 \ 'moved': 'WORD', |
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135 \ }) |
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136 < Use {options} to change the properties. |
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137 |
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138 |
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139 popup_menu({text}, {options}) *popup_menu()* |
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140 Show the {text} near the cursor, handle selecting one of the |
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141 items with cursorkeys, and close it an item is selected with |
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142 Space or Enter. {text} should have multiple lines to make this |
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143 useful. This works like: > |
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144 call popup_create({text}, { |
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145 \ 'pos': 'center', |
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146 \ 'zindex': 200, |
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147 \ 'wrap': 0, |
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148 \ 'border': [], |
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149 \ 'filter': 'popup_filter_menu', |
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150 \ }) |
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151 < Use {options} to change the properties. Should at least set |
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152 "callback" to a function that handles the selected item. |
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153 |
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154 |
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155 popup_show({id}) *popup_show()* |
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156 If {id} is a hidden popup, show it now. |
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157 |
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158 popup_hide({id}) *popup_hide()* |
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159 If {id} is a displayed popup, hide it now. If the popup has a |
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160 filter it will not be invoked for so long as the popup is |
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161 hidden. |
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162 |
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163 popup_move({id}, {options}) *popup_move()* |
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164 Move popup {id} to the position speficied with {options}. |
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165 {options} may contain the items from |popup_create()| that |
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166 specify the popup position: "line", "col", "pos", "maxheight", |
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167 "minheight", "maxwidth" and "minwidth". |
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168 |
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169 |
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170 popup_filter_menu({id}, {key}) *popup_filter_menu()* |
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171 Filter that can be used for a popup. It handles the cursor |
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172 keys to move the selected index in the popup. Space and Enter |
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173 can be used to select an item. Invokes the "callback" of the |
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174 popup menu with the index of the selected line as the second |
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175 argument. |
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176 |
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177 |
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178 popup_filter_yesno({id}, {key}) *popup_filter_yesno()* |
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179 Filter that can be used for a popup. It handles only the keys |
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180 'y', 'Y' and 'n' or 'N'. Invokes the "callback" of the |
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181 popup menu with the 1 for 'y' or 'Y' and zero for 'n' or 'N' |
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182 as the second argument. Pressing Esc and CTRL-C works like |
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183 pressing 'n'. |
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184 |
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185 |
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186 popup_setoptions({id}, {options}) *popup_setoptions()* |
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187 Override options in popup {id} with entries in {options}. |
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188 |
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189 |
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190 popup_getoptions({id}) *popup_getoptions()* |
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191 Return the {options} for popup {id}. |
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192 |
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193 |
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194 popup_close({id}) *popup_close()* |
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195 Close popup {id}. |
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196 |
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197 *:popupclear* *:popupc* |
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198 :popupc[lear] Emergency solution to a misbehaving plugin: close all popup |
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199 windows. |
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200 |
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201 |
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202 POPUP BUFFER AND WINDOW *popup-buffer* |
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203 |
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204 A new buffer is created to hold the text and text properties of the popup |
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205 window. The buffer is always associated with the popup window and |
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206 manipulation is restricted: |
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207 - the buffer has no name |
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208 - 'buftype' is "popup" |
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209 - 'swapfile' is off |
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210 - 'bufhidden' is "hide" |
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211 - 'buflisted' is off |
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212 TODO: more |
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213 |
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214 The window does have a cursor position, but the cursor is not displayed. |
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215 |
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216 Options can be set on the window with `setwinvar()`, e.g.: > |
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217 call setwinvar(winid, '&wrap', 0) |
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218 And options can be set on the buffer with `setbufvar()`, e.g.: > |
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219 call setbufvar(winbufnr(winid), '&filetype', 'java') |
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220 |
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221 |
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222 POPUP_CREATE() ARGUMENTS *popup_create-usage* |
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223 |
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224 The first argument of |popup_create()| specifies the text to be displayed, and |
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225 optionally text properties. It is in one of three forms: |
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226 - a string |
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227 - a list of strings |
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228 - a list of dictionaries, where each dictionary has these entries: |
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229 text String with the text to display. |
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230 props A list of text properties. Optional. |
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231 Each entry is a dictionary, like the third argument of |
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232 |prop_add()|, but specifying the column in the |
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233 dictionary with a "col" entry, see below: |
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234 |popup-props|. |
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235 |
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236 The second argument of |popup_create()| is a dictionary with options: |
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237 line screen line where to position the popup; can use |
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238 "cursor", "cursor+1" or "cursor-1" to use the line of |
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239 the cursor and add or subtract a number of lines; |
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240 default is "cursor-1". |
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241 col screen column where to position the popup; can use |
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242 "cursor" to use the column of the cursor, "cursor+99" |
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243 and "cursor-99" to add or subtract a number of |
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244 columns; default is "cursor" |
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245 pos "topleft", "topright", "botleft" or "botright": |
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246 defines what corner of the popup "line" and "col" are |
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247 used for. Default is "botleft". Alternatively |
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248 "center" can be used to position the popup somewhere |
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249 near the cursor. |
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250 flip when TRUE (the default) and the position is relative |
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251 to the cursor, flip to below or above the cursor to |
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252 avoid overlap with the |popupmenu-completion| or |
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253 another popup with a higher "zindex" |
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254 maxheight maximum height |
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255 minheight minimum height |
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256 maxwidth maximum width |
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257 minwidth minimum width |
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258 hidden when TRUE the popup exists but is not displayed; use |
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259 `popup_show()` to unhide it. |
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260 tab when -1: display the popup on all tabs; when 0 (the |
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261 default): display the popup on the current tab; |
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262 otherwise the number of the tab page the popup is |
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263 displayed on; when invalid the current tab is used |
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264 title text to be displayed above the first item in the |
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265 popup, on top of any border |
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266 wrap TRUE to make the lines wrap (default TRUE) |
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267 highlight highlight group name to use for the text, defines the |
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268 background and foreground color |
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269 border list with numbers, defining the border thickness |
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270 above/right/below/left of the popup; an empty list |
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271 uses a border of 1 all around |
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272 borderhighlight highlight group name to use for the border |
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273 borderchars list with characters, defining the character to use |
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274 for the top/right/bottom/left border; optionally |
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275 followed by the character to use for the |
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276 topright/botright/botleft/topleft corner; an empty |
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277 list can be used to show a double line all around |
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278 zindex priority for the popup, default 50 |
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279 time time in milliseconds after which the popup will close; |
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280 when omitted |popup_close()| must be used. |
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281 moved "cell": close the popup if the cursor moved at least |
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282 one screen cell; "word" allows for moving within |
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283 |<cword>|, "WORD" allows for moving within |<cWORD>|, |
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284 a list with two numbers specifies the start and end |
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285 column |
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286 filter a callback that can filter typed characters, see |
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287 |popup-filter| |
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288 callback a callback to be used when the popup closes, e.g. when |
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289 using |popup_filter_menu()|, see |popup-callback|. |
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290 |
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291 Depending on the "zindex" the popup goes under or above other popups. The |
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292 completion menu (|popup-menu|) has zindex 100. For messages that occur for a |
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293 short time the suggestion is to use zindex 1000. |
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294 |
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295 By default text wraps, which causes a line in {lines} to occupy more than one |
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296 screen line. When "wrap" is FALSE then the text outside of the popup or |
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297 outside of the Vim window will not be displayed, thus truncated. |
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298 |
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299 |
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300 POPUP TEXT PROPERTIES *popup-props* |
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301 |
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302 These are similar to the third argument of |prop_add()|, but not exactly the |
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303 same, since they only apply to one line. |
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304 col starting column, counted in bytes, use one for the |
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305 first column. |
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306 length length of text in bytes; can be zero |
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307 end_col column just after the text; not used when "length" is |
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308 present; when {col} and "end_col" are equal, this is a |
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309 zero-width text property |
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310 id user defined ID for the property; when omitted zero is |
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311 used |
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312 type name of the text property type, as added with |
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313 |prop_type_add()| |
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314 transparent do not show these characters, show the text under it; |
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315 if there is an border character to the right or below |
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316 it will be made transparent as well |
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317 |
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318 |
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319 POPUP FILTER *popup-filter* |
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320 |
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321 A callback that gets any typed keys while a popup is displayed. The filter is |
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322 not invoked for as long as the popup is hidden. |
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323 |
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324 The filter can return TRUE to indicate the key has been handled and is to be |
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325 discarded, or FALSE to let Vim handle the key as usual in the current state. |
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326 |
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327 The filter function is called with two arguments: the ID of the popup and the |
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328 key. |
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329 |
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330 Some common key actions: |
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331 Esc close the popup |
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332 cursor keys select another entry |
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333 Tab accept current suggestion |
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334 |
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335 A mouse click arrives as <LeftMouse>. The coordinates are in |
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336 v:mouse_popup_col and v:mouse_popup_row. The top-left screen cell of the |
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337 popup is col 1, row 1 (not counting the border). |
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338 |
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339 Vim provides standard filters |popup_filter_menu()| and |
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340 |popup_filter_yesno()|. |
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341 |
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342 |
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343 POPUP CALLBACK *popup-callback* |
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344 |
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345 A callback that is invoked when the popup closes. Used by |
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346 |popup_filter_menu()|. Invoked with two arguments: the ID of the popup and |
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347 the result, which would usually be an index in the popup lines, or whatever |
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348 the filter wants to pass. |
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349 |
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350 ============================================================================== |
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351 3. Examples *popup-examples* |
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352 |
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353 TODO |
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354 |
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355 Prompt the user to press y/Y or n/N: > |
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356 |
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357 func MyDialogHandler(id, result) |
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358 if a:result |
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359 " ... 'y' or 'Y' was pressed |
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360 endif |
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361 endfunc |
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362 |
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363 call popup_create(['Continue? y/n'], { |
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364 \ 'filter': 'popup_filter_yesno', |
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365 \ 'callback': 'MyDialogHandler', |
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366 \ }) |
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367 < |
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368 |
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369 vim:tw=78:ts=8:noet:ft=help:norl: |