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133
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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):
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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.Data = bytearray()
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16 t = QTimer(self)
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17 t.timeout.connect(self.updateCursor)
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18 t.setInterval(500)
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19 t.start()
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20 self.cursorX = 0
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21 self.cursorY = 0
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22 def updateCursor(self):
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23 self.blinkcursor = not self.blinkcursor
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24 self.update(self.cursorX, self.cursorY, self.charWidth, self.charHeight)
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25 def setCursorPosition(self, position):
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26 if position > len(self.Data) * 2 - 1:
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27 position = len(self.Data) * 2 - 1
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28 if position < 0:
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29 position = 0
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30 self.cursorPosition = position
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31 x = position % (2 * BYTES_PER_LINE)
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32 self.cursorX = self.xposHex + x * self.charWidth
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33 self.cursorY = int(position / (2 * BYTES_PER_LINE)) * self.charHeight + 4
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34 self.blinkcursor = True
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35 self.update()
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36 def paintEvent(self, event):
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37 painter = QPainter(self)
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38 # Background:
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39 painter.fillRect(event.rect(), self.palette().color(QPalette.Base))
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40 painter.fillRect(QRect(self.xposAddr, event.rect().top(), self.xposHex, self.height()), Qt.yellow)
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41
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42 painter.setPen(Qt.black)
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43 # first and last index
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44 firstIndex = (int(event.rect().top() / self.charHeight) - self.charHeight) * BYTES_PER_LINE
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45 if firstIndex < 0:
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46 firstIndex = 0
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47 lastIndex = (int(event.rect().bottom() / self.charHeight) + self.charHeight) * BYTES_PER_LINE
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48 if lastIndex < 0:
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49 lastIndex = 0
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50 yposStart = int(firstIndex / BYTES_PER_LINE) * self.charHeight + self.charHeight
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51
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52 ypos = yposStart
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53 for index in range(firstIndex, lastIndex, BYTES_PER_LINE):
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54 xpos = self.xposHex
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55 for colIndex in range(BYTES_PER_LINE):
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56 if index + colIndex < len(self.Data):
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57 b = '{0:02X}'.format(self.Data[index + colIndex])
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58 painter.drawText(xpos, ypos, b)
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59 xpos += 2 * self.charWidth
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60 ypos += self.charHeight
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61
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62 # cursor
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63 if self.blinkcursor:
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64 painter.fillRect(self.cursorX, self.cursorY + self.charHeight - 2, self.charWidth, 2, Qt.blue)
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65 def keyPressEvent(self, event):
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66 if event.matches(QKeySequence.MoveToNextChar):
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67 self.setCursorPosition(self.cursorPosition + 1)
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68 if event.matches(QKeySequence.MoveToPreviousChar):
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69 self.setCursorPosition(self.cursorPosition - 1)
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70 if event.matches(QKeySequence.MoveToNextLine):
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71 self.setCursorPosition(self.cursorPosition + 2 * BYTES_PER_LINE)
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72 if event.matches(QKeySequence.MoveToPreviousLine):
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73 self.setCursorPosition(self.cursorPosition - 2 * BYTES_PER_LINE)
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74
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75 def adjust(self):
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76 self.charHeight = self.fontMetrics().height()
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77 self.charWidth = self.fontMetrics().width('x')
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78 self.xposAddr = 2
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79 self.xposHex = self.xposAddr + 8 * self.charWidth + GAP
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80 self.xposAscii = self.xposHex + (BYTES_PER_LINE * 3 - 1) * self.charWidth + GAP
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81 self.setMinimumWidth(self.xposAscii + self.charWidth * BYTES_PER_LINE)
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82 self.setMinimumHeight((int(len(self.Data) / BYTES_PER_LINE) + 1) * self.charHeight)
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83 self.update()
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84 def getBytes(self, offset):
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85 return bytes()
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86 def setHexFile(self, hf):
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87 self.hexfile = hf
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88 self.update()
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89 def getData(self):
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90 return self.data
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91 def setData(self, d):
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92 self.data = d
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93 self.adjust()
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94 self.setCursorPosition(0)
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95 Data = property(getData, setData)
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96
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132
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97 class HexEdit(QScrollArea):
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98 def __init__(self):
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99 super().__init__()
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133
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100 self.setWidgetResizable(True)
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101 self.bv = BinViewer()
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102 self.setWidget(self.bv)
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103 self.setFocusPolicy(Qt.NoFocus)
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132
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104
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133
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105 if __name__ == '__main__':
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106 app = QApplication(sys.argv)
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107 he = HexEdit()
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108 he.show()
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109 he.bv.Data = bytearray(range(100)) * 8
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110 app.exec()
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111
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