eric6/Network/IRC/IrcMessageEdit.py

Sat, 27 Feb 2021 12:08:23 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sat, 27 Feb 2021 12:08:23 +0100
changeset 8138
169e65a6787c
parent 7923
91e843545d9a
child 8043
0acf98cd089a
child 8143
2c730d5fd177
permissions
-rw-r--r--

Shell: added functionality to show a prompt when the main client process has exited (e.g. a script ended).

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1 # -*- coding: utf-8 -*-
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2
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91e843545d9a Updated copyright for 2021.
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3 # Copyright (c) 2012 - 2021 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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000ea446ff4b Prepared the code for Qt > 5.9.99.
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10 from PyQt5.QtCore import Qt
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11
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12 from E5Gui.E5LineEdit import E5LineEdit, E5ClearableLineEdit
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13
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14
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15 class IrcMessageEdit(E5ClearableLineEdit):
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16 """
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17 Class implementing a specialized line edit for entering IRC messages.
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18 """
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19 MaxHistory = 100
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20
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21 def __init__(self, parent=None, inactiveText="",
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22 side=E5LineEdit.RightSide):
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23 """
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24 Constructor
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25
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26 @param parent reference to the parent widget (QWidget)
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27 @param inactiveText text to be shown on inactivity (string)
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28 @param side side the clear button should be shown at
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29 (E5LineEdit.RightSide, E5LineEdit.LeftSide)
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30 """
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31 super(IrcMessageEdit, self).__init__(parent, inactiveText, side)
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32
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33 self.__historyList = [""] # initialize with one empty line
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34 self.__historyLine = 0
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35
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36 def setText(self, text):
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37 """
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38 Public method to set the text.
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39
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40 Note: This reimplementation ensures, that the cursor is at the end of
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41 the text.
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42
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43 @param text text to be set (string)
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44 """
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45 super(IrcMessageEdit, self).setText(text)
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46 self.setCursorPosition(len(text))
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47
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48 def keyPressEvent(self, evt):
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49 """
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50 Protected method implementing special key handling.
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51
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52 @param evt reference to the event (QKeyEvent)
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53 """
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54 key = evt.key()
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55 if key == Qt.Key_Up:
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56 self.__getHistory(True)
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57 return
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58 elif key == Qt.Key_Down:
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59 self.__getHistory(False)
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60 return
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61 elif key in [Qt.Key_Return, Qt.Key_Enter]:
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62 if self.text():
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63 self.__addHistory(self.text())
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64 elif evt.text() == chr(21):
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65 # ^U: clear the text
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66 self.setText("")
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67
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68 super(IrcMessageEdit, self).keyPressEvent(evt)
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69
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70 def wheelEvent(self, evt):
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71 """
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72 Protected slot to support wheel events.
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73
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74 @param evt reference to the wheel event (QWheelEvent)
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75 """
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76 delta = evt.angleDelta().y()
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77 if delta > 0:
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78 self.__getHistory(True)
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79 elif delta < 0:
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80 self.__getHistory(False)
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81
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82 super(IrcMessageEdit, self).wheelEvent(evt)
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83
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84 def __addHistory(self, txt):
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85 """
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86 Private method to add an entry to the history.
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87
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88 @param txt text to be added to the history (string)
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89 """
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90 # Only add the entry, if it is not the same as last time
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91 if (
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92 len(self.__historyList) == 1 or
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93 (len(self.__historyList) > 1 and self.__historyList[1] != txt)
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94 ):
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95 # Replace empty first entry and add new empty first entry
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96 self.__historyList[0] = txt
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97 self.__historyList.insert(0, "")
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98 # Keep history below the defined limit
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99 del self.__historyList[IrcMessageEdit.MaxHistory:]
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100
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101 self.__historyLine = 0
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102
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103 def __getHistory(self, up):
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104 """
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105 Private method to move in the history.
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106
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107 @param up flag indicating the direction (boolean)
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108 """
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109 # preserve the current text, if it is not empty
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110 if self.text():
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111 self.__historyList[self.__historyLine] = self.text()
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112
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113 if up:
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114 self.__historyLine += 1
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115 # If the position was moved past the end of the history,
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116 # go to the last entry
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117 if self.__historyLine == len(self.__historyList):
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118 self.__historyLine -= 1
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
119 return
3e728bfc178c Added a specialized line edit for entering IRC messages, which supports a non-persistent edit history.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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120 else:
2992
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parents: 2960
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121 # If the position is at the top of the history, arrow-down shall
dbdf27746da5 Continued to shorten the code lines to max. 79 characters.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2960
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122 # add the text to the history and clear the line edit for new input
2255
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parents:
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123 if self.__historyLine == 0:
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parents:
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124 if self.text():
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parents:
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125 self.__addHistory(self.text())
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parents:
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126 self.setText("")
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parents:
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127 else:
2992
dbdf27746da5 Continued to shorten the code lines to max. 79 characters.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2960
diff changeset
128 # If the position is not at the top of the history,
dbdf27746da5 Continued to shorten the code lines to max. 79 characters.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2960
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129 # decrement it
2255
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parents:
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130 self.__historyLine -= 1
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
3e728bfc178c Added a specialized line edit for entering IRC messages, which supports a non-persistent edit history.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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132 # replace the text of the line edit with the selected history entry
3e728bfc178c Added a specialized line edit for entering IRC messages, which supports a non-persistent edit history.
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parents:
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133 self.setText(self.__historyList[self.__historyLine])

eric ide

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