Network/IRC/IrcMessageEdit.py

Sat, 05 Jul 2014 15:02:45 +0200

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sat, 05 Jul 2014 15:02:45 +0200
changeset 3682
2543741b47b7
parent 3656
441956d8fce5
child 3778
0c5bc18da740
permissions
-rw-r--r--

Changed a few files to reference eric6.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2012 - 2014 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 a specialized line edit for entering IRC messages.
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8 """
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9
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10 from __future__ import unicode_literals
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11
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12 from PyQt5.QtCore import Qt
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13
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14 from E5Gui.E5LineEdit import E5LineEdit, E5ClearableLineEdit
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15
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16
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17 class IrcMessageEdit(E5ClearableLineEdit):
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18 """
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19 Class implementing a specialized line edit for entering IRC messages.
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20 """
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21 MaxHistory = 100
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22
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23 def __init__(self, parent=None, inactiveText="",
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24 side=E5LineEdit.RightSide):
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25 """
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26 Constructor
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27
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28 @param parent reference to the parent widget (QWidget)
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29 @keyparam inactiveText text to be shown on inactivity (string)
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30 @keyparam side side the clear button should be shown at
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31 (E5LineEdit.RightSide, E5LineEdit.LeftSide)
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32 """
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33 super(IrcMessageEdit, self).__init__(parent, inactiveText, side)
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34
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35 self.__historyList = [""] # initialize with one empty line
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36 self.__historyLine = 0
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37
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38 def setText(self, text):
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39 """
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40 Public method to set the text.
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41
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42 Note: This reimplementation ensures, that the cursor is at the end of
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43 the text.
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44
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45 @param text text to be set (string)
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46 """
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47 super(IrcMessageEdit, self).setText(text)
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48 self.setCursorPosition(len(text))
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49
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50 def keyPressEvent(self, evt):
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51 """
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52 Protected method implementing special key handling.
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53
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54 @param evt reference to the event (QKeyEvent)
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55 """
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56 key = evt.key()
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57 if key == Qt.Key_Up:
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58 self.__getHistory(True)
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59 return
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60 elif key == Qt.Key_Down:
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61 self.__getHistory(False)
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62 return
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63 elif key in [Qt.Key_Return, Qt.Key_Enter]:
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64 if self.text():
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65 self.__addHistory(self.text())
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66 elif evt.text() == chr(21):
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67 # ^U: clear the text
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68 self.setText("")
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69
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70 super(IrcMessageEdit, self).keyPressEvent(evt)
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71
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72 def wheelEvent(self, evt):
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73 """
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74 Protected slot to support wheel events.
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75
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76 @param evt reference to the wheel event (QWheelEvent)
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77 """
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78 if evt.angleDelta().y() > 0:
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79 self.__getHistory(True)
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80 elif evt.angleDelta().y() < 0:
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81 self.__getHistory(False)
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82
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83 super(IrcMessageEdit, self).wheelEvent(evt)
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84
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85 def __addHistory(self, txt):
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86 """
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87 Private method to add an entry to the history.
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88
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89 @param txt text to be added to the history (string)
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90 """
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91 # Only add the entry, if it is not the same as last time
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92 if len(self.__historyList) == 1 or \
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93 (len(self.__historyList) > 1 and self.__historyList[1] != txt):
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94 # Replace empty first entry and add new empty first entry
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95 self.__historyList[0] = txt
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96 self.__historyList.insert(0, "")
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97 # Keep history below the defined limit
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98 del self.__historyList[IrcMessageEdit.MaxHistory:]
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99
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100 self.__historyLine = 0
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101
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102 def __getHistory(self, up):
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103 """
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104 Private method to move in the history.
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105
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106 @param up flag indicating the direction (boolean)
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107 """
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108 # preserve the current text, if it is not empty
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109 if self.text():
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110 self.__historyList[self.__historyLine] = self.text()
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111
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112 if up:
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113 self.__historyLine += 1
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114 # If the position was moved past the end of the history,
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115 # go to the last entry
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116 if self.__historyLine == len(self.__historyList):
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117 self.__historyLine -= 1
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118 return
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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119 else:
2992
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parents: 2960
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120 # If the position is at the top of the history, arrow-down shall
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parents: 2960
diff changeset
121 # add the text to the history and clear the line edit for new input
2255
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parents:
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122 if self.__historyLine == 0:
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parents:
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123 if self.text():
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parents:
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124 self.__addHistory(self.text())
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parents:
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125 self.setText("")
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parents:
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126 else:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2960
diff changeset
127 # If the position is not at the top of the history,
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2960
diff changeset
128 # decrement it
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parents:
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129 self.__historyLine -= 1
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parents:
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130
3e728bfc178c Added a specialized line edit for entering IRC messages, which supports a non-persistent edit history.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
131 # replace the text of the line edit with the selected history entry
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parents:
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132 self.setText(self.__historyList[self.__historyLine])

eric ide

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