Mercurial > libervia-desktop-kivy
annotate cagou/core/behaviors.py @ 461:3c9ba4a694ef
dates update
author | Goffi <goffi@goffi.org> |
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date | Fri, 19 Mar 2021 11:57:19 +0100 |
parents | f7476818f9fb |
children | 203755bbe0fe |
rev | line source |
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1 #!/usr/bin/env python3 |
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2 |
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3 |
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4 # Cagou: desktop/mobile frontend for Salut à Toi XMPP client |
461 | 5 # Copyright (C) 2016-2021 Jérôme Poisson (goffi@goffi.org) |
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6 |
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7 # This program is free software: you can redistribute it and/or modify |
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8 # it under the terms of the GNU Affero General Public License as published by |
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9 # the Free Software Foundation, either version 3 of the License, or |
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10 # (at your option) any later version. |
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11 |
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12 # This program is distributed in the hope that it will be useful, |
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 # GNU Affero General Public License for more details. |
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16 |
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17 # You should have received a copy of the GNU Affero General Public License |
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 |
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20 |
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21 from kivy import properties |
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22 from kivy.animation import Animation |
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23 from kivy.clock import Clock |
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24 from kivy_garden import modernmenu |
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25 from functools import partial |
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26 |
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27 |
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28 class TouchMenu(modernmenu.ModernMenu): |
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29 pass |
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30 |
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31 |
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32 class TouchMenuItemBehavior: |
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33 """Class to use on every item where a menu may appear |
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34 |
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35 main_wid attribute must be set to the class inheriting from TouchMenuBehavior |
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36 do_item_action is the method called on simple click |
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37 getMenuChoices must return a list of menus for long press |
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38 menus there are dict as expected by ModernMenu |
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39 (translated text, index and callback) |
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40 """ |
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41 main_wid = properties.ObjectProperty() |
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42 click_timeout = properties.NumericProperty(0.4) |
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43 |
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44 def on_touch_down(self, touch): |
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45 if not self.collide_point(*touch.pos): |
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46 return |
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47 t = partial(self.open_menu, touch) |
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48 touch.ud['menu_timeout'] = t |
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49 Clock.schedule_once(t, self.click_timeout) |
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50 return super(TouchMenuItemBehavior, self).on_touch_down(touch) |
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51 |
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52 def do_item_action(self, touch): |
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53 pass |
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54 |
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55 def on_touch_up(self, touch): |
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56 if touch.ud.get('menu_timeout'): |
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57 Clock.unschedule(touch.ud['menu_timeout']) |
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58 if self.collide_point(*touch.pos) and self.main_wid.menu is None: |
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59 self.do_item_action(touch) |
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60 return super(TouchMenuItemBehavior, self).on_touch_up(touch) |
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61 |
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62 def open_menu(self, touch, dt): |
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63 self.main_wid.open_menu(self, touch) |
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64 del touch.ud['menu_timeout'] |
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65 |
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66 def getMenuChoices(self): |
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67 """return choice adapted to selected item |
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68 |
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69 @return (list[dict]): choices ad expected by ModernMenu |
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70 """ |
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71 return [] |
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72 |
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73 |
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74 class TouchMenuBehavior: |
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75 """Class to handle a menu appearing on long press on items |
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76 |
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77 classes using this behaviour need to have a float_layout property |
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78 pointing the main FloatLayout. |
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79 """ |
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80 float_layout = properties.ObjectProperty() |
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81 |
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82 def __init__(self, *args, **kwargs): |
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83 super(TouchMenuBehavior, self).__init__(*args, **kwargs) |
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84 self.menu = None |
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85 self.menu_item = None |
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86 |
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87 ## menu methods ## |
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88 |
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89 def clean_fl_children(self, layout, children): |
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90 """insure that self.menu and self.menu_item are None when menu is dimissed""" |
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91 if self.menu is not None and self.menu not in children: |
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92 self.menu = self.menu_item = None |
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93 |
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94 def clear_menu(self): |
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95 """remove menu if there is one""" |
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96 if self.menu is not None: |
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97 self.menu.dismiss() |
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98 self.menu = None |
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99 self.menu_item = None |
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100 |
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101 def open_menu(self, item, touch): |
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102 """open menu for item |
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103 |
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104 @param item(PathWidget): item when the menu has been requested |
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105 @param touch(kivy.input.MotionEvent): touch data |
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106 """ |
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107 if self.menu_item == item: |
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108 return |
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109 self.clear_menu() |
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110 pos = self.to_widget(*touch.pos) |
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111 choices = item.getMenuChoices() |
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112 if not choices: |
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113 return |
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114 self.menu = TouchMenu(choices=choices, |
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115 center=pos, |
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116 size_hint=(None, None)) |
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117 self.float_layout.add_widget(self.menu) |
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118 self.menu.start_display(touch) |
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119 self.menu_item = item |
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120 |
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121 def on_float_layout(self, wid, float_layout): |
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122 float_layout.bind(children=self.clean_fl_children) |
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123 |
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124 |
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125 class FilterBehavior(object): |
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126 """class to handle items filtering with animation""" |
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127 |
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128 def __init__(self, *args, **kwargs): |
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129 super(FilterBehavior, self).__init__(*args, **kwargs) |
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130 self._filter_last = {} |
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131 self._filter_anim = Animation(width = 0, |
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132 height = 0, |
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133 opacity = 0, |
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134 d = 0.5) |
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135 |
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136 def do_filter(self, parent, text, get_child_text, width_cb, height_cb, |
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137 continue_tests=None): |
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138 """filter the children |
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139 |
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140 filtered children will have a animation to set width, height and opacity to 0 |
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141 @param parent(kivy.uix.widget.Widget): parent layout of the widgets to filter |
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142 @param text(unicode): filter text (if this text is not present in a child, |
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143 the child is filtered out) |
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144 @param get_child_text(callable): must retrieve child text |
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145 child is used as sole argument |
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146 @param width_cb(callable, int, None): method to retrieve width when opened |
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147 child is used as sole argument, int can be used instead of callable |
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148 @param height_cb(callable, int, None): method to retrieve height when opened |
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149 child is used as sole argument, int can be used instead of callable |
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150 @param continue_tests(list[callable]): list of test to skip the item |
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151 all callables take child as sole argument. |
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152 if any of the callable return True, the child is skipped (i.e. not filtered) |
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153 """ |
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154 text = text.strip().lower() |
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155 filtering = len(text)>len(self._filter_last.get(parent, '')) |
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156 self._filter_last[parent] = text |
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157 for child in parent.children: |
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158 if continue_tests is not None and any((t(child) for t in continue_tests)): |
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159 continue |
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160 if text in get_child_text(child).lower(): |
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161 self._filter_anim.cancel(child) |
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162 for key, method in (('width', width_cb), |
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163 ('height', height_cb), |
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164 ('opacity', lambda c: 1)): |
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165 try: |
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166 setattr(child, key, method(child)) |
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167 except TypeError: |
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168 # method is not a callable, must be an int |
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169 setattr(child, key, method) |
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170 elif (filtering |
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171 and child.opacity > 0 |
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172 and not self._filter_anim.have_properties_to_animate(child)): |
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173 self._filter_anim.start(child) |