E5Gui/E5PassivePopup.py

Sun, 19 Jun 2011 15:19:46 +0200

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sun, 19 Jun 2011 15:19:46 +0200
changeset 1127
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parent 945
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child 1131
7781e396c903
permissions
-rw-r--r--

Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2010 - 2011 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6 """
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7 Module implementing dialog-like popup that displays messages without
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8 interrupting the user.
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9 """
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10
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11 from PyQt4.QtCore import pyqtSignal, Qt, QTimer, QPoint, QRect
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12 from PyQt4.QtGui import QFrame, QVBoxLayout, QApplication
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13
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14
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15 class E5PassivePopup(QFrame):
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16 """
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17 Class implementing dialog-like popup that displays messages without
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18 interrupting the user.
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19 """
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20 Boxed = 0
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21 Custom = 128
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22
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23 clicked = pyqtSignal((), (QPoint, ))
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24
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25 def __init__(self, parent=None):
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26 """
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27 Constructor
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28
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29 @param parent reference to the parent widget (QWidget)
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30 """
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31 QFrame.__init__(self, None)
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32
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33 self.__popupStyle = DEFAULT_POPUP_TYPE
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34 self.__msgView = None
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35 self.__topLayout = None
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36 self.__hideDelay = DEFAULT_POPUP_TIME
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37 self.__hideTimer = QTimer(self)
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38 self.__autoDelete = False
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39 self.__fixedPosition = QPoint()
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40
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41 self.setWindowFlags(POPUP_FLAGS)
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42 self.setFrameStyle(QFrame.Box | QFrame.Plain)
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43 self.setLineWidth(2)
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44 self.__hideTimer.timeout.connect(self.hide)
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45 self.clicked[()].connect(self.hide)
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46
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47 def setView(self, child):
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48 """
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49 Public method to set the message view.
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50
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51 @param child reference to the widget to set as the message view (QWidget)
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52 """
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53 self.__msgView = child
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54 self.__topLayout = QVBoxLayout(self)
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55 self.__topLayout.addWidget(self.__msgView)
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56 self.__topLayout.activate()
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57
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58 def view(self):
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59 """
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60 Public method to get a reference to the message view.
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61
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62 @return reference to the message view (QWidget)
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63 """
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64 return self.__msgView
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65
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66 def setVisible(self, visible):
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67 """
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68 Public method to show or hide the popup.
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69
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70 @param visible flag indicating the visibility status (boolean)
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71 """
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72 if not visible:
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73 QFrame.setVisible(self, visible)
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74 return
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75
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76 if self.size() != self.sizeHint():
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77 self.resize(self.sizeHint())
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78
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79 if self.__fixedPosition.isNull():
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80 self.__positionSelf()
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81 else:
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82 self.move(self.__fixedPosition)
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83 QFrame.setVisible(self, True)
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84
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85 delay = self.__hideDelay
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86 if delay < 0:
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87 delay = DEFAULT_POPUP_TIME
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88 if delay > 0:
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89 self.__hideTimer.start(delay)
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90
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91 def show(self, p=None):
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92 """
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93 Public slot to show the popup.
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94
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95 @param p position for the popup (QPoint)
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96 """
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97 if p is not None:
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98 self.__fixedPosition = p
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99 QFrame.show(self)
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100
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101 def setTimeout(self, delay):
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102 """
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103 Public method to set the delay for the popup is removed automatically.
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104
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105 Setting the delay to 0 disables the timeout. If you're doing this, you
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106 may want to connect the clicked() signal to the hide() slot. Setting the
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107 delay to -1 makes it use the default value.
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108
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109 @param delay value for the delay in milliseconds (integer)
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110 """
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111 self.__hideDelay = delay
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112 if self.__hideTimer.isActive():
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113 if delay:
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114 if delay == -1:
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115 delay = DEFAULT_POPUP_TIME
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116 self.__hideTimer.start(delay)
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117 else:
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118 self.__hideTimer.stop()
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119
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120 def timeout(self):
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121 """
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122 Public method to get the delay before the popup is removed automatically.
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123
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124 @return the delay before the popup is removed automatically (integer)
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125 """
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126 return self.__hideDelay
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127
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128 def mouseReleaseEvent(self, evt):
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129 """
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130 Protected method to handle a mouse release event.
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131
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132 @param evt reference to the mouse event (QMouseEvent)
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133 """
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134 self.clicked[()].emit()
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135 self.clicked[(QPoint, )].emit(evt.pos())
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136
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137 def hideEvent(self, evt):
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138 """
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139 Protected method to handle the hide event.
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140
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141 @param evt reference to the hide event (QHideEvent)
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142 """
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143 self.__hideTimer.stop()
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144
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145 def __defaultArea(self):
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146 """
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147 Private method to determine the default rectangle to be passed to
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148 moveNear().
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149
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150 @return default rectangle (QRect)
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151 """
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152 return QRect(100, 100, 200, 200)
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153
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154 def __positionSelf(self):
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155 """
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156 Private method to position the popup.
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157 """
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158 self.__moveNear(self.__defaultArea())
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159
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160 def __moveNear(self, target):
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161 """
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162 Private method to move the popup to be adjacent to the specified rectangle.
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163
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164 @param target rectangle to be placed at (QRect)
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165 """
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166 pos = self.__calculateNearbyPoint(target)
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167 self.move(pos.x(), pos.y())
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168
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169 def __calculateNearbyPoint(self, target):
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170 """
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171 Private method to calculate the position to place the popup near the
634
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172 specified rectangle.
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173
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174 @param target rectangle to be placed at (QRect)
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175 @return position to place the popup (QPoint)
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176 """
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177 pos = target.topLeft()
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178 x = pos.x()
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179 y = pos.y()
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180 w = self.minimumSizeHint().width()
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181 h = self.minimumSizeHint().height()
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182
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183 r = QApplication.desktop().screenGeometry(QPoint(x + w // 2, y + h // 2))
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184
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185 if x < r.center().x():
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186 x += target.width()
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187 else:
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188 x -= w
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189
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190 # It's apparently trying to go off screen, so display it ALL at the bottom.
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191 if (y + h) > r.bottom():
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192 y = r.bottom() - h
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193
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194 if (x + w) > r.right():
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195 x = r.right() - w
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196
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197 if y < r.top():
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198 y = r.top()
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199
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200 if x < r.left():
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201 x = r.left()
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202
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203 return QPoint(x, y)
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204
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205 DEFAULT_POPUP_TYPE = E5PassivePopup.Boxed
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206 DEFAULT_POPUP_TIME = 6 * 1000
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207 POPUP_FLAGS = Qt.WindowFlags(Qt.Tool | Qt.X11BypassWindowManagerHint | \
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208 Qt.WindowStaysOnTopHint | Qt.FramelessWindowHint)

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