src/qweechat/input.py

   1 #!/usr/bin/python
   2 # -*- coding: utf-8 -*-
   3 #
   4 # Copyright (C) 2011-2012 Sebastien Helleu <flashcode@flashtux.org>
   5 #
   6 # This file is part of QWeeChat, a Qt remote GUI for WeeChat.
   7 #
   8 # QWeeChat is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 3 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # QWeeChat is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with QWeeChat.  If not, see <http://www.gnu.org/licenses/>.
  20 #
  21
  22 #
  23 # Input line (for chat or debug window).
  24 #
  25
  26 import qt_compat
  27 QtCore = qt_compat.import_module('QtCore')
  28 QtGui = qt_compat.import_module('QtGui')
  29
  30
  31 class InputLineEdit(QtGui.QLineEdit):
  32     """Input line."""
  33
  34     bufferSwitchPrev = qt_compat.Signal()
  35     bufferSwitchNext = qt_compat.Signal()
  36     textSent = qt_compat.Signal(str)
  37
  38     def __init__(self, scroll_widget):
  39         QtGui.QLineEdit.__init__(self)
  40         self.scroll_widget = scroll_widget
  41         self._history = []
  42         self._history_index = -1
  43         self.returnPressed.connect(self._input_return_pressed)
  44
  45     def keyPressEvent(self, event):
  46         key = event.key()
  47         modifiers = event.modifiers()
  48         bar = self.scroll_widget.verticalScrollBar()
  49         if modifiers == QtCore.Qt.ControlModifier and key == QtCore.Qt.Key_PageUp:
  50             self.bufferSwitchPrev.emit()
  51         elif modifiers == QtCore.Qt.AltModifier and key in (QtCore.Qt.Key_Left, QtCore.Qt.Key_Up):
  52             self.bufferSwitchPrev.emit()
  53         elif modifiers == QtCore.Qt.ControlModifier and key == QtCore.Qt.Key_PageDown:
  54             self.bufferSwitchNext.emit()
  55         elif modifiers == QtCore.Qt.AltModifier and key in (QtCore.Qt.Key_Right, QtCore.Qt.Key_Down):
  56             self.bufferSwitchNext.emit()
  57         elif modifiers == QtCore.Qt.AltModifier and key == QtCore.Qt.Key_PageUp:
  58             bar.setValue(bar.value() - (bar.pageStep() / 10))
  59         elif modifiers == QtCore.Qt.AltModifier and key == QtCore.Qt.Key_PageDown:
  60             bar.setValue(bar.value() + (bar.pageStep() / 10))
  61         elif key == QtCore.Qt.Key_PageUp:
  62             bar.setValue(bar.value() - bar.pageStep())
  63         elif key == QtCore.Qt.Key_PageDown:
  64             bar.setValue(bar.value() + bar.pageStep())
  65         elif modifiers == QtCore.Qt.AltModifier and key == QtCore.Qt.Key_Home:
  66             bar.setValue(bar.minimum())
  67         elif modifiers == QtCore.Qt.AltModifier and key == QtCore.Qt.Key_End:
  68             bar.setValue(bar.maximum())
  69         elif key == QtCore.Qt.Key_Up:
  70             self._history_navigate(-1)
  71         elif key == QtCore.Qt.Key_Down:
  72             self._history_navigate(1)
  73         else:
  74             QtGui.QLineEdit.keyPressEvent(self, event)
  75
  76     def _input_return_pressed(self):
  77         self._history.append(str(self.text()))
  78         self._history_index = len(self._history)
  79         self.textSent.emit(self.text())
  80         self.clear()
  81
  82     def _history_navigate(self, direction):
  83         if self._history:
  84             self._history_index += direction
  85             if self._history_index < 0:
  86                 self._history_index = 0
  87                 return
  88             if self._history_index > len(self._history) - 1:
  89                 self._history_index = len(self._history)
  90                 self.clear()
  91                 return
  92             self.setText(self._history[self._history_index])