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1 import sys
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132
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2 from PyQt4.QtCore import *
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3 from PyQt4.QtGui import *
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4
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133
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5 BYTES_PER_LINE = 8
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6 GAP = 16
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7
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8 class BinViewer(QWidget):
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9 """ The view has an address, hex byte and ascii column """
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10 def __init__(self, scrollArea):
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135
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11 super().__init__(scrollArea)
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12 self.scrollArea = scrollArea
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13 self.setFont(QFont('Courier', 18))
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14 self.setFocusPolicy(Qt.StrongFocus)
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15 self.blinkcursor = False
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16 self.cursorX = 0
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17 self.cursorY = 0
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18 self.scrollArea = scrollArea
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19 self.Data = bytearray()
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20 t = QTimer(self)
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21 t.timeout.connect(self.updateCursor)
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22 t.setInterval(500)
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23 t.start()
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24 def updateCursor(self):
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25 self.blinkcursor = not self.blinkcursor
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26 self.update(self.cursorX, self.cursorY, self.charWidth, self.charHeight)
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27 def setCursorPosition(self, position):
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28 position = int(position)
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29 if position > len(self.Data) * 2 - 1:
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30 position = len(self.Data) * 2 - 1
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31 if position < 0:
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32 position = 0
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33 self.cursorPosition = position
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34 x = position % (2 * BYTES_PER_LINE)
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35 self.cursorX = self.xposHex + x * self.charWidth
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36 self.cursorY = int(position / (2 * BYTES_PER_LINE)) * self.charHeight + 4
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37 self.blinkcursor = True
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38 self.update()
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135
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39 def getCursorPosition(self):
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40 return self.cursorPosition
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41 CursorPosition = property(getCursorPosition, setCursorPosition)
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133
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42 def paintEvent(self, event):
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43 painter = QPainter(self)
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44 # Background:
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45 painter.fillRect(event.rect(), self.palette().color(QPalette.Base))
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135
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46 painter.fillRect(QRect(self.xposAddr, event.rect().top(), self.xposHex, self.height()), Qt.gray)
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47 painter.setPen(Qt.gray)
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48 x = self.xposAscii - (GAP / 2)
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49 painter.drawLine(x, event.rect().top(), x, self.height())
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50
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51 painter.setPen(Qt.black)
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52 # first and last index
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53 firstIndex = (int(event.rect().top() / self.charHeight) - self.charHeight) * BYTES_PER_LINE
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54 if firstIndex < 0:
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55 firstIndex = 0
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56 lastIndex = (int(event.rect().bottom() / self.charHeight) + self.charHeight) * BYTES_PER_LINE
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57 if lastIndex < 0:
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58 lastIndex = 0
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59 yposStart = int(firstIndex / BYTES_PER_LINE) * self.charHeight + self.charHeight
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60
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61 ypos = yposStart
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62 for index in range(firstIndex, lastIndex, BYTES_PER_LINE):
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63 painter.drawText(self.xposAddr, ypos, '{0:08X}'.format(index))
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64
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65 xpos = self.xposHex
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66 xposA = self.xposAscii
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67 for colIndex in range(BYTES_PER_LINE):
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68 if index + colIndex < len(self.Data):
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69 b = self.Data[index + colIndex]
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70 bhex = '{0:02X}'.format(b)
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71 ba = chr(b)
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72 painter.drawText(xpos, ypos, bhex)
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73 painter.drawText(xposA, ypos, ba)
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74 xpos += 2 * self.charWidth
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75 xposA += self.charWidth
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76 ypos += self.charHeight
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77
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78 # cursor
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79 if self.blinkcursor:
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80 painter.fillRect(self.cursorX, self.cursorY + self.charHeight - 2, self.charWidth, 2, Qt.black)
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81 def keyPressEvent(self, event):
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82 if event.matches(QKeySequence.MoveToNextChar):
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83 self.CursorPosition += 1
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84 if event.matches(QKeySequence.MoveToPreviousChar):
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85 self.CursorPosition -= 1
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86 if event.matches(QKeySequence.MoveToNextLine):
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87 self.CursorPosition += 2 * BYTES_PER_LINE
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88 if event.matches(QKeySequence.MoveToPreviousLine):
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89 self.CursorPosition -= 2 * BYTES_PER_LINE
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90 char = event.text().lower()
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91 if char and char in '0123456789abcdef':
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92 i = int(self.CursorPosition / 2)
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93 hb = self.CursorPosition % 2
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94 v = int(char, 16)
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95 if hb == 0:
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96 # high half byte
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97 self.data[i] = (self.data[i] & 0xF) | (v << 4)
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98 else:
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99 self.data[i] = (self.data[i] & 0xF0) | v
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100 self.CursorPosition += 1
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101 self.scrollArea.ensureVisible(self.cursorX, self.cursorY, self.charWidth, self.charHeight + 2)
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102 self.update()
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103 def cursorPositionAt(self, pos):
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104 """ Calculate cursor position at a certain point """
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105 if pos.x() > self.xposHex and pos.x() < self.xposAscii:
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106 x = (pos.x() - self.xposHex) / self.charWidth
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107 y = int(pos.y() / self.charHeight) * 2 * BYTES_PER_LINE
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108 return x + y
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109 return 0
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110 def mousePressEvent(self, event):
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111 cpos = self.cursorPositionAt(event.pos())
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112 self.setCursorPosition(cpos)
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113 def adjust(self):
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114 self.charHeight = self.fontMetrics().height()
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115 self.charWidth = self.fontMetrics().width('x')
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116 self.xposAddr = 2
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117 self.xposHex = self.xposAddr + 8 * self.charWidth + GAP
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118 self.xposAscii = self.xposHex + (BYTES_PER_LINE * 2) * self.charWidth + GAP
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119 self.setMinimumWidth(self.xposAscii + self.charWidth * BYTES_PER_LINE)
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120 self.scrollArea.setMinimumWidth(self.xposAscii + self.charWidth * BYTES_PER_LINE)
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121 self.setMinimumHeight((int(len(self.Data) / BYTES_PER_LINE) + 1) * self.charHeight)
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122 self.update()
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123 def getData(self):
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124 return self.data
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125 def setData(self, d):
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126 self.data = d
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127 self.adjust()
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128 self.setCursorPosition(0)
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129 Data = property(getData, setData)
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130
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132
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131 class HexEdit(QScrollArea):
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132 def __init__(self):
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133 super().__init__()
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134
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134 self.bv = BinViewer(self)
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135 self.setWidget(self.bv)
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135
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136 self.setWidgetResizable(True)
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137 self.setFocusPolicy(Qt.NoFocus)
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132
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138
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133
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139 if __name__ == '__main__':
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140 app = QApplication(sys.argv)
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141 he = HexEdit()
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142 he.show()
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135
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143 he.bv.Data = bytearray(range(100)) * 8 + b'hjkfd'
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133
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144 app.exec()
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145
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