##// END OF EJS Templates
* Implemented KernelManager's 'signal_kernel' method....
* Implemented KernelManager's 'signal_kernel' method. * Added 'set_kernel' method to permit the use of existing kernel processes. * General cleanup and documentation improvement.

File last commit:

r2673:eadbacb7
r2686:740eb8b5
Show More
call_tip_widget.py
171 lines | 6.5 KiB | text/x-python | PythonLexer
epatters
Improved docstring formatting in call tips.
r2666 # Standard library imports
import re
from textwrap import dedent
epatters
Initial checkin of Qt frontend code.
r2602 # System library imports
from PyQt4 import QtCore, QtGui
class CallTipWidget(QtGui.QLabel):
""" Shows call tips by parsing the current text of Q[Plain]TextEdit.
"""
#--------------------------------------------------------------------------
# 'QWidget' interface
#--------------------------------------------------------------------------
def __init__(self, parent):
""" Create a call tip manager that is attached to the specified Qt
text edit widget.
"""
assert isinstance(parent, (QtGui.QTextEdit, QtGui.QPlainTextEdit))
QtGui.QLabel.__init__(self, parent, QtCore.Qt.ToolTip)
self.setFont(parent.document().defaultFont())
self.setForegroundRole(QtGui.QPalette.ToolTipText)
self.setBackgroundRole(QtGui.QPalette.ToolTipBase)
self.setPalette(QtGui.QToolTip.palette())
self.setAlignment(QtCore.Qt.AlignLeft)
self.setIndent(1)
self.setFrameStyle(QtGui.QFrame.NoFrame)
self.setMargin(1 + self.style().pixelMetric(
QtGui.QStyle.PM_ToolTipLabelFrameWidth, None, self))
self.setWindowOpacity(self.style().styleHint(
QtGui.QStyle.SH_ToolTipLabel_Opacity, None, self) / 255.0)
def hideEvent(self, event):
""" Reimplemented to disconnect the cursor movement handler.
"""
epatters
Fixed typos in CallTipWidget due to copy-paste.
r2673 QtGui.QLabel.hideEvent(self, event)
epatters
Initial checkin of Qt frontend code.
r2602 self.parent().cursorPositionChanged.disconnect(self._update_tip)
def paintEvent(self, event):
""" Reimplemented to paint the background panel.
"""
painter = QtGui.QStylePainter(self)
option = QtGui.QStyleOptionFrame()
option.init(self)
painter.drawPrimitive(QtGui.QStyle.PE_PanelTipLabel, option)
painter.end()
QtGui.QLabel.paintEvent(self, event)
def showEvent(self, event):
""" Reimplemented to connect the cursor movement handler.
"""
epatters
Fixed typos in CallTipWidget due to copy-paste.
r2673 QtGui.QLabel.showEvent(self, event)
epatters
Initial checkin of Qt frontend code.
r2602 self.parent().cursorPositionChanged.connect(self._update_tip)
#--------------------------------------------------------------------------
# 'CallTipWidget' interface
#--------------------------------------------------------------------------
epatters
Improved docstring formatting in call tips.
r2666 def show_docstring(self, doc, maxlines=20):
""" Attempts to show the specified docstring at the current cursor
location. The docstring is dedented and possibly truncated for
length.
"""
doc = dedent(doc.rstrip()).lstrip()
match = re.match("(?:[^\n]*\n){%i}" % maxlines, doc)
if match:
doc = doc[:match.end()] + '\n[Documentation continues...]'
return self.show_tip(doc)
epatters
Initial checkin of Qt frontend code.
r2602 def show_tip(self, tip):
""" Attempts to show the specified tip at the current cursor location.
"""
text_edit = self.parent()
document = text_edit.document()
cursor = text_edit.textCursor()
search_pos = cursor.position() - 1
self._start_position, _ = self._find_parenthesis(search_pos,
forward=False)
if self._start_position == -1:
return False
point = text_edit.cursorRect(cursor).bottomRight()
point = text_edit.mapToGlobal(point)
self.move(point)
self.setText(tip)
if self.isVisible():
self.resize(self.sizeHint())
else:
self.show()
return True
#--------------------------------------------------------------------------
# Protected interface
#--------------------------------------------------------------------------
def _find_parenthesis(self, position, forward=True):
""" If 'forward' is True (resp. False), proceed forwards
(resp. backwards) through the line that contains 'position' until an
unmatched closing (resp. opening) parenthesis is found. Returns a
tuple containing the position of this parenthesis (or -1 if it is
not found) and the number commas (at depth 0) found along the way.
"""
commas = depth = 0
document = self.parent().document()
qchar = document.characterAt(position)
while (position > 0 and qchar.isPrint() and
# Need to check explicitly for line/paragraph separators:
qchar.unicode() not in (0x2028, 0x2029)):
char = qchar.toAscii()
if char == ',' and depth == 0:
commas += 1
elif char == ')':
if forward and depth == 0:
break
depth += 1
elif char == '(':
if not forward and depth == 0:
break
depth -= 1
position += 1 if forward else -1
qchar = document.characterAt(position)
else:
position = -1
return position, commas
def _highlight_tip(self, tip, current_argument):
""" Highlight the current argument (arguments start at 0), ending at the
next comma or unmatched closing parenthesis.
FIXME: This is an unreliable way to do things and it isn't being
used right now. Instead, we should use inspect.getargspec
metadata for this purpose.
"""
start = tip.find('(')
if start != -1:
for i in xrange(current_argument):
start = tip.find(',', start)
if start != -1:
end = start + 1
while end < len(tip):
char = tip[end]
depth = 0
if (char == ',' and depth == 0):
break
elif char == '(':
depth += 1
elif char == ')':
if depth == 0:
break
depth -= 1
end += 1
tip = tip[:start+1] + '<font color="blue">' + \
tip[start+1:end] + '</font>' + tip[end:]
tip = tip.replace('\n', '<br/>')
return tip
def _update_tip(self):
""" Updates the tip based on user cursor movement.
"""
cursor = self.parent().textCursor()
if cursor.position() <= self._start_position:
self.hide()
else:
position, commas = self._find_parenthesis(self._start_position + 1)
if position != -1:
self.hide()