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# -*- coding: utf-8 -*-
#
# QBzr - Qt frontend to Bazaar commands
# Copyright (C) 2009 Gary van der Merwe <garyvdm@gmail.com>
#
# Some of this code was coppied from
# http://john.nachtimwald.com/better-qplaintextedit-with-line-numbers/
# Copyright (C) 2009 John Schember
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from PyQt4 import QtCore, QtGui
class AnnotateBarBase(QtGui.QWidget):
def __init__(self, edit, parent):
QtGui.QWidget.__init__(self, parent)
self.edit = edit
self.connect(self.edit,
QtCore.SIGNAL("updateRequest(const QRect&,int)"),
self.updateContents)
def paintEvent(self, event):
current_line = self.edit.document().findBlock(
self.edit.textCursor().position()).blockNumber() + 1
block = self.edit.firstVisibleBlock()
line_count = block.blockNumber()
painter = QtGui.QPainter(self)
painter.fillRect(event.rect(), self.palette().background())
# Iterate over all visible text blocks in the document.
while block.isValid():
line_count += 1
rect = self.edit.blockBoundingGeometry(block)
rect = rect.translated(self.edit.contentOffset())
rect.setWidth(self.width())
# Check if the position of the block is out side of the visible
# area.
if not block.isVisible() or rect.top() >= event.rect().bottom():
break
self.paint_line(painter, rect, line_count, line_count==current_line)
block = block.next()
painter.end()
QtGui.QWidget.paintEvent(self, event)
def paint_line(self, painter, rect, line_number, is_current):
pass
def updateContents(self, rect, scroll):
if scroll:
self.scroll(0, scroll)
else:
self.update(0, rect.y(), self.width(), rect.height())
def mousePressEvent(self, event):
if event.button() == QtCore.Qt.LeftButton:
cursor = self.edit.cursorForPosition(event.pos())
cursor.movePosition(QtGui.QTextCursor.StartOfBlock)
cursor.movePosition(QtGui.QTextCursor.EndOfBlock,
QtGui.QTextCursor.KeepAnchor)
self.edit.setTextCursor(cursor)
self.emit(QtCore.SIGNAL("cursorPositionChanged()"))
def wheelEvent(self, event):
self.edit.wheelEvent(event)
class LineNumberBar(AnnotateBarBase):
def __init__(self, edit, parent):
super(LineNumberBar, self).__init__(edit, parent)
self.adjustWidth(1)
self.connect(self.edit,
QtCore.SIGNAL("blockCountChanged(int)"),
self.adjustWidth)
def adjustWidth(self, count):
width = self.fontMetrics().width(unicode(count))
text_margin = self.style().pixelMetric(
QtGui.QStyle.PM_FocusFrameHMargin, None, self) + 1
width += text_margin * 2
if self.width() != width:
self.setFixedWidth(width)
def paint_line(self, painter, rect, line_number, is_current):
text_margin = self.style().pixelMetric(
QtGui.QStyle.PM_FocusFrameHMargin, None, self) + 1
painter.drawText(rect.adjusted(text_margin, 0, -text_margin, 0),
QtCore.Qt.AlignRight, unicode(line_number))
class AnnotateEditerFrameBase(QtGui.QFrame):
def __init__(self, parent = None):
QtGui.QFrame.__init__(self,parent)
self.setFrameStyle(QtGui.QFrame.StyledPanel | QtGui.QFrame.Sunken)
self.hbox = QtGui.QHBoxLayout(self)
self.hbox.setSpacing(0)
self.hbox.setMargin(0)
class LineNumberEditerFrame(AnnotateEditerFrameBase):
def __init__(self, parent= None):
super(LineNumberEditerFrame, self).__init__(parent)
self.edit = QtGui.QPlainTextEdit(self)
self.edit.setFrameStyle(QtGui.QFrame.NoFrame)
self.number_bar = LineNumberBar(self.edit, self)
self.hbox.addWidget(self.number_bar)
self.hbox.addWidget(self.edit)
def setFocus(self):
self.edit.setFocus()
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