254 lines
6.4 KiB
Python
254 lines
6.4 KiB
Python
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"""
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I needed a simple gauge, so I've made on with Pmw.
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It might be useful for others to use as a base to develop more comples
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gauges with.
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Is it worth cleaning up and submitting?
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cheers and thanks
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chris
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Dr. Chris Wright
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Intensive Care Unit
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Monash Medical Centre
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Clayton. VIC Australia
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"""
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import sys
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import Tkinter
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import Pmw
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import time
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if sys.platform == 'win32':
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# MS-Windows specific fonts
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label_font = "-family Ariel -size 12"
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value_font = "-family Ariel -size 12"
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small_font = "-family {MS Sans Serif} -size 9 -weight bold"
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header_font = "-family {MS Sans Serif} -weight bold"
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else:
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# X-Windows specific fonts
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label_font = "-*-helvetica-*-r-*-*-*-160-*-*-*-*-*-*"
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value_font = "-*-courier-*-r-*-*-*-160-*-*-*-*-*-*"
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small_font = "-*-helvetica-*-r-*-*-*-130-*-*-*-*-*-*"
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header_font = "-*-helvetica-bold-r-*-*-*-150-*-*-*-*-*-*"
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class VerticalGauge(Pmw.MegaWidget):
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"""Vertical gauge with actual and desired settings"""
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def __init__(self, parent = None, **kw):
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optiondefs = (
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('min', 0, None),
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('max', 100, None),
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('majortickinterval', 10, None),
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('minortickinterval', 5, None),
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('units', '', None),
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('bg', 'grey', self._backgroundSet),
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('actualvalue', 50, self._actualSet),
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('desiredvalue', 50, self._desiredSet),
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('actualcolour', 'yellow1', None),
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('desiredcolour', 'turquoise1', None),
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('label', 'Label', None),
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)
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self.defineoptions(kw, optiondefs)
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Pmw.MegaWidget.__init__(self, parent)
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interior = self.interior()
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interior.grid_rowconfigure(1, weight = 1)
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for r in range(3):
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interior.grid_columnconfigure(r, weight = 1)
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self.actuallabel = self.createcomponent('actualLabel',
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(), None,
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Tkinter.Label, (interior,),
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text = '',
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width = 3,
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relief = 'sunken',
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bd = 1,
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fg = self['actualcolour'],
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font = value_font)
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self.actuallabel.grid(sticky = "nswe", row = 0, column = 0)
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self.label = self.createcomponent('label',
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(), None,
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Tkinter.Label, (interior,),
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text = self['label'],
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relief = 'raised',
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font = label_font,
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fg = 'navy',
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bd = 2)
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self.label.grid(sticky = "nsew", row = 0, column = 1)
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self.desiredlabel = self.createcomponent('desiredLabel',
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(), None,
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Tkinter.Label, (interior,),
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text = '',
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width = 3,
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relief = 'sunken',
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bd = 1,
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fg = self['desiredcolour'],
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font = value_font)
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self.desiredlabel.grid(sticky = "nswe", row = 0, column = 2)
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self.canvas = self.createcomponent('canvas',
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(), None,
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Tkinter.Canvas, (interior,),
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width = 100,
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height = 300,
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bg = 'grey')
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self.canvas.grid(sticky = "nsew", columnspan = 3, pady = 1)
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self.canvas.bind("<Configure>", self._createGaugeAxes)
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self._createGaugeAxes()
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self.initialiseoptions()
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def _createGaugeAxes(self, event = None):
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min = self['min']
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max = self['max']
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units = self['units']
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majortickinterval = self['majortickinterval']
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gauge_range = max - min
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c = self.canvas
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c.delete("all")
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if event:
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h, w = event.height, event.width
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else:
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h = int(c.configure("height")[4])
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w = int(c.configure("width")[4])
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self.lower = h - 15
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self.upper = 15
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self.middle = w / 2
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c.create_line(self.middle, self.lower, self.middle, self.upper)
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majortickcount = int((max - min) / majortickinterval)
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self.axislength = self.lower - self.upper
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self.majortickdistance = float(self.axislength) / majortickcount
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self.majortickwidth = w / 5
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labeloffset = (w / 4) + 10
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for i in range(majortickcount + 1):
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v = min + i * majortickinterval
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d = self.lower - i * self.majortickdistance
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c.create_line(self.middle, d, self.middle + self.majortickwidth, d)
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c.create_text(self.middle + labeloffset, d, font = small_font, text = str(v))
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self._desiredSet(event)
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self._actualSet(event)
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def _backgroundSet(self):
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self.canvas.configure(bg = self['bg'])
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def _desiredSet(self, event = None):
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c = self.canvas
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desired = self['desiredvalue']
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desiredcolour = self['desiredcolour']
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min = self['min']
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max = self['max']
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if desired > max: desired = max
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if desired < min: desired = min
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gauge_range = max - min
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c = self.canvas
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if event:
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h, w = event.height, event.width
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else:
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h = int(c.configure("height")[4])
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w = int(c.configure("width")[4])
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desired_y = self.lower - (float(desired - min) / gauge_range) * self.axislength
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try:
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c.delete('desiredBar')
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except:
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pass
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c.create_line(self.middle - self.majortickwidth, desired_y,
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self.middle + self.majortickwidth, desired_y,
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fill = desiredcolour, stipple = 'gray50',
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width = 10, tag = 'desiredBar')
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self.desiredlabel.configure(text = desired)
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def setActual(self, value):
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self.configure(actualvalue = value)
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def getActual(self):
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return self.cget('actualvalue')
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def _actualSet(self, event = None):
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c = self.canvas
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actual = self['actualvalue']
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actualcolour = self['actualcolour']
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min = self['min']
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max = self['max']
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if actual > max: actual = max
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if actual < min: actual = min
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gauge_range = max - min
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c = self.canvas
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if event:
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h, w = event.height, event.width
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else:
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h = int(c.configure("height")[4])
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w = int(c.configure("width")[4])
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actual_y = self.lower - (float(actual - min) / gauge_range) * self.axislength
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try:
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c.delete('actualPointer')
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except:
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pass
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triangle = ((self.middle, actual_y),
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(self.middle - 1.4 * self.majortickwidth, actual_y - self.majortickwidth / 2),
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(self.middle - 1.4 * self.majortickwidth, actual_y + self.majortickwidth / 2))
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c.create_polygon(triangle, fill = actualcolour, tag = 'actualPointer')
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self.actuallabel.configure(text = actual)
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Pmw.forwardmethods(VerticalGauge, Tkinter.Canvas, 'canvas')
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if __name__ == '__main__':
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# Initialise Tkinter and Pmw.
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root = Pmw.initialise()
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root.title('Pmw VerticalGauge demonstration')
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def increase():
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av = g1.getActual()
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g1.setActual(av + 1)
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def decrease():
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av = g1.getActual()
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g1.setActual(av - 1)
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g1 = VerticalGauge(min = 0,
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max = 30,
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actualvalue = 15,
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desiredvalue = 22,
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majortickinterval = 2,
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label = "Pms")
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g1.grid(sticky = "nsew")
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root.grid_rowconfigure(0, weight = 1)
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root.grid_columnconfigure(0, weight = 1)
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b1 = Tkinter.Button(text = "Increase", command = increase)
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b1.grid()
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b2 = Tkinter.Button(text = "Decrease", command = decrease)
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b2.grid()
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# Let's go.
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root.mainloop()
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