annotate python/ide/hexedit.py @ 333:dcae6574c974

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author Windel Bouwman
date Sun, 09 Feb 2014 15:27:57 +0100
parents 7b38782ed496
children 11c5a8a70c02
rev   line source
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1 #!/usr/bin/python
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2
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3 import sys
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4 import os
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5 from qtwrapper import QtGui, QtCore, QtWidgets, Qt
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6
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7
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8 BYTES_PER_LINE, GAP = 8, 12
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9
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10 def clamp(minimum, x, maximum):
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11 return max(minimum, min(x, maximum))
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12
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13 def asciiChar(v):
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14 if v < 0x20 or v > 0x7e:
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15 return '.'
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16 else:
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17 return chr(v)
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18
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19 class BinViewer(QtWidgets.QWidget):
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20 """ The view has an address, hex byte and ascii column """
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21 def __init__(self, scrollArea):
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22 super().__init__(scrollArea)
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23 self.scrollArea = scrollArea
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24 self.setFont(QtGui.QFont('Courier', 16))
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25 self.setFocusPolicy(Qt.StrongFocus)
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26 self.blinkcursor = False
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27 self.cursorX = self.cursorY = 0
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28 self.scrollArea = scrollArea
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29 self.Data = bytearray()
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30 self.Offset = 0
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31 t = QtCore.QTimer(self)
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32 t.timeout.connect(self.updateCursor)
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33 t.setInterval(500)
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34 t.start()
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35
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36 def updateCursor(self):
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37 self.blinkcursor = not self.blinkcursor
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38 self.update(self.cursorX, self.cursorY, self.charWidth, self.charHeight)
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39
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40 def setCursorPosition(self, position):
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41 position = clamp(0, int(position), len(self.Data) * 2 - 1)
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42 self.cursorPosition = position
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43 x = position % (2 * BYTES_PER_LINE)
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44 x = x + int(x / 2) # Create a gap between hex values
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45 self.cursorX = self.xposHex + x * self.charWidth
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46 y = int(position / (2 * BYTES_PER_LINE))
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47 self.cursorY = y * self.charHeight + 2
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48 self.blinkcursor = True
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49 self.update()
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50
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51 def getCursorPosition(self):
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52 return self.cursorPosition
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53 CursorPosition = property(getCursorPosition, setCursorPosition)
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54 def setOffset(self, off):
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55 self.offset = off
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56 self.update()
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57
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58 Offset = property(lambda self: self.offset, setOffset)
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59 def paintEvent(self, event):
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60 # Helper variables:
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61 er = event.rect()
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62 chw, chh = self.charWidth, self.charHeight
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63 painter = QtGui.QPainter(self)
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64 # Background:
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65 painter.fillRect(er, self.palette().color(QtGui.QPalette.Base))
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66 painter.fillRect(QtCore.QRect(self.xposAddr, er.top(), 8 * chw, er.bottom() + 1), Qt.gray)
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67 painter.setPen(Qt.gray)
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68 x = self.xposAscii - (GAP / 2)
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69 painter.drawLine(x, er.top(), x, er.bottom())
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70 x = self.xposEnd - (GAP / 2)
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71 painter.drawLine(x, er.top(), x, er.bottom())
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72 # first and last index
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73 firstIndex = max((int(er.top() / chh) - chh) * BYTES_PER_LINE, 0)
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74 lastIndex = max((int(er.bottom() / chh) + chh) * BYTES_PER_LINE, 0)
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75 yposStart = int(firstIndex / BYTES_PER_LINE) * chh + chh
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76 # Draw contents:
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77 painter.setPen(Qt.black)
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78 ypos = yposStart
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79 for index in range(firstIndex, lastIndex, BYTES_PER_LINE):
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80 painter.setPen(Qt.black)
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81 painter.drawText(self.xposAddr, ypos, '{0:08X}'.format(index + self.Offset))
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82 xpos = self.xposHex
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83 xposAscii = self.xposAscii
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84 for colIndex in range(BYTES_PER_LINE):
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85 if index + colIndex < len(self.Data):
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86 b = self.Data[index + colIndex]
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87 bo = self.originalData[index + colIndex]
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88 if b == bo:
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89 painter.setPen(Qt.black)
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90 else:
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91 painter.setPen(Qt.red)
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92 painter.drawText(xpos, ypos, '{0:02X}'.format(b))
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93 painter.drawText(xposAscii, ypos, asciiChar(b))
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94 xpos += 3 * chw
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95 xposAscii += chw
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96 ypos += chh
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97 # cursor
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98 if self.blinkcursor:
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99 painter.fillRect(self.cursorX, self.cursorY + chh - 2, chw, 2, Qt.black)
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100
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101 def keyPressEvent(self, event):
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102 if event.matches(QKeySequence.MoveToNextChar):
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103 self.CursorPosition += 1
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104 if event.matches(QKeySequence.MoveToPreviousChar):
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105 self.CursorPosition -= 1
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106 if event.matches(QKeySequence.MoveToNextLine):
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107 self.CursorPosition += 2 * BYTES_PER_LINE
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108 if event.matches(QKeySequence.MoveToPreviousLine):
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109 self.CursorPosition -= 2 * BYTES_PER_LINE
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110 if event.matches(QKeySequence.MoveToNextPage):
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111 rows = int(self.scrollArea.viewport().height() / self.charHeight)
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112 self.CursorPosition += (rows - 1) * 2 * BYTES_PER_LINE
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113 if event.matches(QKeySequence.MoveToPreviousPage):
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114 rows = int(self.scrollArea.viewport().height() / self.charHeight)
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115 self.CursorPosition -= (rows - 1) * 2 * BYTES_PER_LINE
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116 char = event.text().lower()
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117 if char and char in '0123456789abcdef':
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118 i = int(self.CursorPosition / 2)
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119 hb = self.CursorPosition % 2
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120 v = int(char, 16)
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121 if hb == 0:
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122 # high half byte
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123 self.data[i] = (self.data[i] & 0xF) | (v << 4)
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124 else:
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125 self.data[i] = (self.data[i] & 0xF0) | v
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126 self.CursorPosition += 1
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127 self.scrollArea.ensureVisible(self.cursorX, self.cursorY + self.charHeight / 2, 4, self.charHeight / 2 + 4)
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128 self.update()
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129
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130 def setCursorPositionAt(self, pos):
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131 """ Calculate cursor position at a certain point """
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132 if pos.x() > self.xposHex and pos.x() < self.xposAscii:
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133 x = round((2 * (pos.x() - self.xposHex)) / (self.charWidth * 3))
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134 y = int(pos.y() / self.charHeight) * 2 * BYTES_PER_LINE
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135 self.setCursorPosition(x + y)
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136
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137 def mousePressEvent(self, event):
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138 self.setCursorPositionAt(event.pos())
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139
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140 def adjust(self):
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141 self.charHeight = self.fontMetrics().height()
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142 self.charWidth = self.fontMetrics().width('x')
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143 self.xposAddr = GAP
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144 self.xposHex = self.xposAddr + 8 * self.charWidth + GAP
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145 self.xposAscii = self.xposHex + (BYTES_PER_LINE * 3 - 1) * self.charWidth + GAP
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146 self.xposEnd = self.xposAscii + self.charWidth * BYTES_PER_LINE + GAP
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147 self.setMinimumWidth(self.xposEnd)
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148 if self.isVisible():
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149 sbw = self.scrollArea.verticalScrollBar().width()
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150 self.scrollArea.setMinimumWidth(self.xposEnd + sbw + 5)
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151 r = len(self.Data) % BYTES_PER_LINE
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152 r = 1 if r > 0 else 0
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153 self.setMinimumHeight((int(len(self.Data) / BYTES_PER_LINE) + r) * self.charHeight + 4)
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154 self.scrollArea.setMinimumHeight(self.charHeight * 8)
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155 self.update()
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156
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157 def showEvent(self, e):
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158 self.adjust()
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159 super().showEvent(e)
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160
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161 def setData(self, d):
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162 self.data = bytearray(d)
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163 self.originalData = bytearray(d)
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164 self.adjust()
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165 self.setCursorPosition(0)
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166 Data = property(lambda self: self.data, setData)
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167
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168
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169 class HexEdit(QtWidgets.QScrollArea):
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170 def __init__(self):
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171 super().__init__()
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172 self.bv = BinViewer(self)
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173 self.setWidget(self.bv)
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174 self.setWidgetResizable(True)
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175 self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOn)
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176 self.setFocusPolicy(Qt.NoFocus)
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177
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178
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179 class HexEditor(QtWidgets.QMainWindow):
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180 def __init__(self):
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181 super().__init__()
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182 basedir = os.path.dirname(__file__)
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183 uic.loadUi(os.path.join(basedir, 'hexeditor.ui'), baseinstance=self)
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184 self.he = HexEdit()
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185 self.setCentralWidget(self.he)
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186 self.actionOpen.triggered.connect(self.doOpen)
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187 self.actionSave.triggered.connect(self.doSave)
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188 self.actionSaveAs.triggered.connect(self.doSaveAs)
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189 self.fileName = None
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190 self.updateControls()
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191 def updateControls(self):
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192 s = True if self.fileName else False
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193 self.actionSave.setEnabled(s)
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194 self.actionSaveAs.setEnabled(s)
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195 def doOpen(self):
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196 filename = QFileDialog.getOpenFileName(self)
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197 if filename:
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198 with open(filename, 'rb') as f:
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199 self.he.bv.Data = f.read()
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200 self.fileName = filename
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201 self.updateControls()
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202 def doSave(self):
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203 self.updateControls()
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204 def doSaveAs(self):
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205 filename = QFileDialog.getSaveFileName(self)
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206 if filename:
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207 with open(filename, 'wb') as f:
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208 f.write(self.he.bv.Data)
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209 self.fileName = filename
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210 self.updateControls()
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211
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212
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213 if __name__ == '__main__':
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214 app = QApplication(sys.argv)
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215 he = HexEditor()
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216 he.show()
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217 #he.bv.Data = bytearray(range(100)) * 8 + b'x'
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218 app.exec()