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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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11 super().__init__()
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12 self.setFont(QFont('Courier', 10))
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13 self.setFocusPolicy(Qt.StrongFocus)
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14 self.blinkcursor = False
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15 self.cursorX = 0
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16 self.cursorY = 0
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17 self.scrollArea = scrollArea
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18 self.Data = bytearray()
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19 t = QTimer(self)
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20 t.timeout.connect(self.updateCursor)
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21 t.setInterval(500)
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22 t.start()
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23 def updateCursor(self):
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24 self.blinkcursor = not self.blinkcursor
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25 self.update(self.cursorX, self.cursorY, self.charWidth, self.charHeight)
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26 def setCursorPosition(self, position):
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27 if position > len(self.Data) * 2 - 1:
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28 position = len(self.Data) * 2 - 1
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29 if position < 0:
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30 position = 0
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31 self.cursorPosition = position
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32 x = position % (2 * BYTES_PER_LINE)
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33 self.cursorX = self.xposHex + x * self.charWidth
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34 self.cursorY = int(position / (2 * BYTES_PER_LINE)) * self.charHeight + 4
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35 self.blinkcursor = True
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36 self.update()
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37 def paintEvent(self, event):
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38 painter = QPainter(self)
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39 # Background:
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40 painter.fillRect(event.rect(), self.palette().color(QPalette.Base))
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41 painter.fillRect(QRect(self.xposAddr, event.rect().top(), self.xposHex, self.height()), Qt.yellow)
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42
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43 painter.setPen(Qt.black)
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44 # first and last index
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45 firstIndex = (int(event.rect().top() / self.charHeight) - self.charHeight) * BYTES_PER_LINE
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46 if firstIndex < 0:
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47 firstIndex = 0
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48 lastIndex = (int(event.rect().bottom() / self.charHeight) + self.charHeight) * BYTES_PER_LINE
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49 if lastIndex < 0:
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50 lastIndex = 0
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51 yposStart = int(firstIndex / BYTES_PER_LINE) * self.charHeight + self.charHeight
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52
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53 ypos = yposStart
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54 for index in range(firstIndex, lastIndex, BYTES_PER_LINE):
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55 painter.drawText(self.xposAddr, ypos, '{0:08X}'.format(index))
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56
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57 xpos = self.xposHex
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58 for colIndex in range(BYTES_PER_LINE):
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59 if index + colIndex < len(self.Data):
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60 b = '{0:02X}'.format(self.Data[index + colIndex])
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61 painter.drawText(xpos, ypos, b)
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62 xpos += 2 * self.charWidth
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63 ypos += self.charHeight
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64
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65 # cursor
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66 if self.blinkcursor:
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67 painter.fillRect(self.cursorX, self.cursorY + self.charHeight - 2, self.charWidth, 2, Qt.blue)
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68 def keyPressEvent(self, event):
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69 if event.matches(QKeySequence.MoveToNextChar):
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70 self.setCursorPosition(self.cursorPosition + 1)
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71 if event.matches(QKeySequence.MoveToPreviousChar):
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72 self.setCursorPosition(self.cursorPosition - 1)
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73 if event.matches(QKeySequence.MoveToNextLine):
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74 self.setCursorPosition(self.cursorPosition + 2 * BYTES_PER_LINE)
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75 if event.matches(QKeySequence.MoveToPreviousLine):
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76 self.setCursorPosition(self.cursorPosition - 2 * BYTES_PER_LINE)
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77 self.ensureVisible()
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78 self.update()
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79 def ensureVisible(self):
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80 self.scrollArea.ensureVisible(self.cursorX, self.cursorY + self.charHeight, 3, self.charHeight / 2 + 2)
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81 def adjust(self):
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82 self.charHeight = self.fontMetrics().height()
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83 self.charWidth = self.fontMetrics().width('x')
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84 self.xposAddr = 2
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85 self.xposHex = self.xposAddr + 8 * self.charWidth + GAP
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86 self.xposAscii = self.xposHex + (BYTES_PER_LINE * 3 - 1) * self.charWidth + GAP
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87 self.setMinimumWidth(self.xposAscii + self.charWidth * BYTES_PER_LINE)
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88 self.setMinimumHeight((int(len(self.Data) / BYTES_PER_LINE) + 1) * self.charHeight)
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89 self.update()
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90 def getBytes(self, offset):
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91 return bytes()
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92 def setHexFile(self, hf):
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93 self.hexfile = hf
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94 self.update()
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95 def getData(self):
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96 return self.data
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97 def setData(self, d):
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98 self.data = d
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99 self.adjust()
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100 self.setCursorPosition(0)
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101 Data = property(getData, setData)
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102
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132
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103 class HexEdit(QScrollArea):
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104 def __init__(self):
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105 super().__init__()
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106 self.setWidgetResizable(True)
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107 self.bv = BinViewer(self)
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108 self.setWidget(self.bv)
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109 self.setFocusPolicy(Qt.NoFocus)
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110
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111 if __name__ == '__main__':
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112 app = QApplication(sys.argv)
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113 he = HexEdit()
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114 he.show()
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115 he.bv.Data = bytearray(range(100)) * 8
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116 app.exec()
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117
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