Mercurial Repositories > eric / file comparison
comparison: eric6/Network/IRC/IrcMessageEdit.py
eric6/Network/IRC/IrcMessageEdit.py
- changeset 6942
- 2602857055c5
- parent 6645
- ad476851d7e0
- child 7198
- 684261ef2165
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| 6941:f99d60d6b59b | 6942:2602857055c5 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2012 - 2019 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing a specialized line edit for entering IRC messages. | |
| 8 """ | |
| 9 | |
| 10 from __future__ import unicode_literals | |
| 11 | |
| 12 from PyQt5.QtCore import Qt | |
| 13 | |
| 14 from E5Gui.E5LineEdit import E5LineEdit, E5ClearableLineEdit | |
| 15 | |
| 16 from Globals import qVersionTuple | |
| 17 | |
| 18 | |
| 19 class IrcMessageEdit(E5ClearableLineEdit): | |
| 20 """ | |
| 21 Class implementing a specialized line edit for entering IRC messages. | |
| 22 """ | |
| 23 MaxHistory = 100 | |
| 24 | |
| 25 def __init__(self, parent=None, inactiveText="", | |
| 26 side=E5LineEdit.RightSide): | |
| 27 """ | |
| 28 Constructor | |
| 29 | |
| 30 @param parent reference to the parent widget (QWidget) | |
| 31 @keyparam inactiveText text to be shown on inactivity (string) | |
| 32 @keyparam side side the clear button should be shown at | |
| 33 (E5LineEdit.RightSide, E5LineEdit.LeftSide) | |
| 34 """ | |
| 35 super(IrcMessageEdit, self).__init__(parent, inactiveText, side) | |
| 36 | |
| 37 self.__historyList = [""] # initialize with one empty line | |
| 38 self.__historyLine = 0 | |
| 39 | |
| 40 def setText(self, text): | |
| 41 """ | |
| 42 Public method to set the text. | |
| 43 | |
| 44 Note: This reimplementation ensures, that the cursor is at the end of | |
| 45 the text. | |
| 46 | |
| 47 @param text text to be set (string) | |
| 48 """ | |
| 49 super(IrcMessageEdit, self).setText(text) | |
| 50 self.setCursorPosition(len(text)) | |
| 51 | |
| 52 def keyPressEvent(self, evt): | |
| 53 """ | |
| 54 Protected method implementing special key handling. | |
| 55 | |
| 56 @param evt reference to the event (QKeyEvent) | |
| 57 """ | |
| 58 key = evt.key() | |
| 59 if key == Qt.Key_Up: | |
| 60 self.__getHistory(True) | |
| 61 return | |
| 62 elif key == Qt.Key_Down: | |
| 63 self.__getHistory(False) | |
| 64 return | |
| 65 elif key in [Qt.Key_Return, Qt.Key_Enter]: | |
| 66 if self.text(): | |
| 67 self.__addHistory(self.text()) | |
| 68 elif evt.text() == chr(21): | |
| 69 # ^U: clear the text | |
| 70 self.setText("") | |
| 71 | |
| 72 super(IrcMessageEdit, self).keyPressEvent(evt) | |
| 73 | |
| 74 def wheelEvent(self, evt): | |
| 75 """ | |
| 76 Protected slot to support wheel events. | |
| 77 | |
| 78 @param evt reference to the wheel event (QWheelEvent) | |
| 79 """ | |
| 80 if qVersionTuple() >= (5, 0, 0): | |
| 81 delta = evt.angleDelta().y() | |
| 82 else: | |
| 83 delta = evt.delta() | |
| 84 if delta > 0: | |
| 85 self.__getHistory(True) | |
| 86 elif delta < 0: | |
| 87 self.__getHistory(False) | |
| 88 | |
| 89 super(IrcMessageEdit, self).wheelEvent(evt) | |
| 90 | |
| 91 def __addHistory(self, txt): | |
| 92 """ | |
| 93 Private method to add an entry to the history. | |
| 94 | |
| 95 @param txt text to be added to the history (string) | |
| 96 """ | |
| 97 # Only add the entry, if it is not the same as last time | |
| 98 if len(self.__historyList) == 1 or \ | |
| 99 (len(self.__historyList) > 1 and self.__historyList[1] != txt): | |
| 100 # Replace empty first entry and add new empty first entry | |
| 101 self.__historyList[0] = txt | |
| 102 self.__historyList.insert(0, "") | |
| 103 # Keep history below the defined limit | |
| 104 del self.__historyList[IrcMessageEdit.MaxHistory:] | |
| 105 | |
| 106 self.__historyLine = 0 | |
| 107 | |
| 108 def __getHistory(self, up): | |
| 109 """ | |
| 110 Private method to move in the history. | |
| 111 | |
| 112 @param up flag indicating the direction (boolean) | |
| 113 """ | |
| 114 # preserve the current text, if it is not empty | |
| 115 if self.text(): | |
| 116 self.__historyList[self.__historyLine] = self.text() | |
| 117 | |
| 118 if up: | |
| 119 self.__historyLine += 1 | |
| 120 # If the position was moved past the end of the history, | |
| 121 # go to the last entry | |
| 122 if self.__historyLine == len(self.__historyList): | |
| 123 self.__historyLine -= 1 | |
| 124 return | |
| 125 else: | |
| 126 # If the position is at the top of the history, arrow-down shall | |
| 127 # add the text to the history and clear the line edit for new input | |
| 128 if self.__historyLine == 0: | |
| 129 if self.text(): | |
| 130 self.__addHistory(self.text()) | |
| 131 self.setText("") | |
| 132 else: | |
| 133 # If the position is not at the top of the history, | |
| 134 # decrement it | |
| 135 self.__historyLine -= 1 | |
| 136 | |
| 137 # replace the text of the line edit with the selected history entry | |
| 138 self.setText(self.__historyList[self.__historyLine]) |
