--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/eric6/Network/IRC/IrcMessageEdit.py Sun Apr 14 15:09:21 2019 +0200
@@ -0,0 +1,138 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2012 - 2019 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing a specialized line edit for entering IRC messages.
+"""
+
+from __future__ import unicode_literals
+
+from PyQt5.QtCore import Qt
+
+from E5Gui.E5LineEdit import E5LineEdit, E5ClearableLineEdit
+
+from Globals import qVersionTuple
+
+
+class IrcMessageEdit(E5ClearableLineEdit):
+ """
+ Class implementing a specialized line edit for entering IRC messages.
+ """
+ MaxHistory = 100
+
+ def __init__(self, parent=None, inactiveText="",
+ side=E5LineEdit.RightSide):
+ """
+ Constructor
+
+ @param parent reference to the parent widget (QWidget)
+ @keyparam inactiveText text to be shown on inactivity (string)
+ @keyparam side side the clear button should be shown at
+ (E5LineEdit.RightSide, E5LineEdit.LeftSide)
+ """
+ super(IrcMessageEdit, self).__init__(parent, inactiveText, side)
+
+ self.__historyList = [""] # initialize with one empty line
+ self.__historyLine = 0
+
+ def setText(self, text):
+ """
+ Public method to set the text.
+
+ Note: This reimplementation ensures, that the cursor is at the end of
+ the text.
+
+ @param text text to be set (string)
+ """
+ super(IrcMessageEdit, self).setText(text)
+ self.setCursorPosition(len(text))
+
+ def keyPressEvent(self, evt):
+ """
+ Protected method implementing special key handling.
+
+ @param evt reference to the event (QKeyEvent)
+ """
+ key = evt.key()
+ if key == Qt.Key_Up:
+ self.__getHistory(True)
+ return
+ elif key == Qt.Key_Down:
+ self.__getHistory(False)
+ return
+ elif key in [Qt.Key_Return, Qt.Key_Enter]:
+ if self.text():
+ self.__addHistory(self.text())
+ elif evt.text() == chr(21):
+ # ^U: clear the text
+ self.setText("")
+
+ super(IrcMessageEdit, self).keyPressEvent(evt)
+
+ def wheelEvent(self, evt):
+ """
+ Protected slot to support wheel events.
+
+ @param evt reference to the wheel event (QWheelEvent)
+ """
+ if qVersionTuple() >= (5, 0, 0):
+ delta = evt.angleDelta().y()
+ else:
+ delta = evt.delta()
+ if delta > 0:
+ self.__getHistory(True)
+ elif delta < 0:
+ self.__getHistory(False)
+
+ super(IrcMessageEdit, self).wheelEvent(evt)
+
+ def __addHistory(self, txt):
+ """
+ Private method to add an entry to the history.
+
+ @param txt text to be added to the history (string)
+ """
+ # Only add the entry, if it is not the same as last time
+ if len(self.__historyList) == 1 or \
+ (len(self.__historyList) > 1 and self.__historyList[1] != txt):
+ # Replace empty first entry and add new empty first entry
+ self.__historyList[0] = txt
+ self.__historyList.insert(0, "")
+ # Keep history below the defined limit
+ del self.__historyList[IrcMessageEdit.MaxHistory:]
+
+ self.__historyLine = 0
+
+ def __getHistory(self, up):
+ """
+ Private method to move in the history.
+
+ @param up flag indicating the direction (boolean)
+ """
+ # preserve the current text, if it is not empty
+ if self.text():
+ self.__historyList[self.__historyLine] = self.text()
+
+ if up:
+ self.__historyLine += 1
+ # If the position was moved past the end of the history,
+ # go to the last entry
+ if self.__historyLine == len(self.__historyList):
+ self.__historyLine -= 1
+ return
+ else:
+ # If the position is at the top of the history, arrow-down shall
+ # add the text to the history and clear the line edit for new input
+ if self.__historyLine == 0:
+ if self.text():
+ self.__addHistory(self.text())
+ self.setText("")
+ else:
+ # If the position is not at the top of the history,
+ # decrement it
+ self.__historyLine -= 1
+
+ # replace the text of the line edit with the selected history entry
+ self.setText(self.__historyList[self.__historyLine])
