src/pixmapdial.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 # Imports (Global)
   5 from PyQt4.QtCore import QRectF
   6 from PyQt4.QtGui import QDial, QPainter, QPixmap
   7
   8 # Imports (Custom Stuff)
   9 import icons_rc
  10
  11 # Custom Dial, using a pixmap for paiting
  12 class PixmapDial(QDial):
  13     def __init__(self, parent=None):
  14         super(PixmapDial, self).__init__(parent)
  15
  16         self.p_width = 1
  17         self.p_height = 1
  18         self.p_count = 1
  19         self.use_pixmap = True
  20         self.setPixmap(1)
  21
  22     def setPixmap(self, n):
  23         if (n < 1):
  24           self.use_pixmap = False
  25         else:
  26           self.use_pixmap = True
  27
  28           if (n > 6):
  29             n = 6
  30
  31           self.pixmap = QPixmap(":/bitmaps/dial_%i.png" % (n))
  32           self.updateSizes()
  33
  34     def getSize(self):
  35         return p_width
  36
  37     def updateSizes(self):
  38         self.p_width = self.pixmap.width()
  39         self.p_height = self.pixmap.height()
  40
  41         if (self.p_width < 1):
  42           self.p_width = 1
  43
  44         if (self.p_height < 1):
  45           self.p_height = 1
  46
  47         self.p_count = self.p_height/self.p_width
  48
  49         self.setMinimumSize(self.p_width, self.p_width)
  50         self.setMaximumSize(self.p_width, self.p_width)
  51
  52     def paintEvent(self, event):
  53         if (self.use_pixmap):
  54           current = float(self.value()-self.minimum())
  55           divider = float(self.maximum()-self.minimum())
  56
  57           if (divider == 0.0):
  58             return
  59
  60           yper = int((self.p_count-1)*(current/divider))
  61           ypos = self.p_width*yper
  62
  63           target = QRectF(0.0, 0.0, self.p_width, self.p_width)
  64           source = QRectF(0.0, ypos, self.p_width, self.p_width)
  65
  66           painter = QPainter(self)
  67           painter.drawPixmap(target, self.pixmap, source)
  68
  69         else:
  70           return QDial.paintEvent(self, event)
  71
  72     def resizeEvent(self, event):
  73         if (self.use_pixmap):
  74           self.updateSizes()
  75
  76         return QDial.resizeEvent(self, event)
  77