351 lines
10 KiB
Python
351 lines
10 KiB
Python
# --------------------------------------------------------------------------------- #
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# PYGAUGE wxPython IMPLEMENTATION
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#
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# Mark Reed, @ 28 Jul 2010
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# Latest Revision: 14 Apr 2010, 12.00 GMT
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#
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# TODO List
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#
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# 1. Indeterminate mode (see wx.Gauge)
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# 2. Vertical bar
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# 3. Bitmap support (bar, background)
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# 4. UpdateFunction - Pass a function to PyGauge which will be called every X
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# milliseconds and the value will be updated to the returned value.
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# 5. Currently the full gradient is drawn from 0 to value. Perhaps the gradient
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# should be drawn from 0 to range and clipped at 0 to value.
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# 6. Add a label?
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#
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# For All Kind Of Problems, Requests Of Enhancements And Bug Reports, Please
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# Write To The:
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#
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# wxPython Mailing List!!!
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#
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# End Of Comments
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# --------------------------------------------------------------------------------- #
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"""
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PyGauge is a generic Gauge implementation.
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Description
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===========
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PyGauge supports the determinate mode functions as wxGauge and adds an Update function
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which takes a value and a time parameter. The value is added to the current value over
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a period of time milliseconds.
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Supported Platforms
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===================
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PyGauge has been tested on the following platforms:
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* Windows (Windows XP);
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License And Version
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===================
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PyGauge is distributed under the wxPython license.
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Latest Revision: Andrea Gavana @ 14 Apr 2010, 12.00 GMT
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Version 0.1
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"""
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import wx
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import copy
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class PyGauge(wx.PyWindow):
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"""
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This class provides a visual alternative for `wx.Gauge`. It currently
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only support determinant mode (see SetValue and SetRange)
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"""
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def __init__(self, parent, id=wx.ID_ANY, range=100, pos=wx.DefaultPosition,
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size=(-1,30), style=0):
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"""
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Default class constructor.
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:param `parent`: parent window. Must not be ``None``;
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:param `id`: window identifier. A value of -1 indicates a default value;
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:param `pos`: the control position. A value of (-1, -1) indicates a default position,
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chosen by either the windowing system or wxPython, depending on platform;
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:param `size`: the control size. A value of (-1, -1) indicates a default size,
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chosen by either the windowing system or wxPython, depending on platform.
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"""
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wx.PyWindow.__init__(self, parent, id, pos, size, style)
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self._size = size
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self._border_colour = wx.BLACK
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self._barColour = self._barColourSorted = [wx.Colour(212,228,255)]
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self._barGradient = self._barGradientSorted = None
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self._border_padding = 0
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self._range = range
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self._value = [0]
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self._valueSorted = [0]
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self._skipDigits = True
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self._timerId = wx.NewId()
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self._timer = None
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self.SetBarGradient((wx.Colour(153,153,153),wx.Colour(204,204,204)))
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self.SetBackgroundColour(wx.Colour(102,102,102))
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self.Bind(wx.EVT_PAINT, self.OnPaint)
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self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
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self.Bind(wx.EVT_TIMER, self.OnTimer)
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def DoGetBestSize(self):
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"""
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Overridden base class virtual. Determines the best size of the
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button based on the label and bezel size.
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"""
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return wx.Size(self._size[0], self._size[1])
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def GetBorderColour(self):
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return self._border_colour
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def SetBorderColour(self, colour):
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self._border_colour = colour
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SetBorderColor = SetBorderColour
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GetBorderColor = GetBorderColour
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def GetBarColour(self):
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return self._barColour[0]
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def SetBarColour(self, colour):
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if type(colour) != type([]):
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self._barColour = [colour]
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else:
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self._barColour = list(colour)
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self.SortForDisplay()
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SetBarColor = SetBarColour
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GetBarColor = GetBarColour
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def SetSkipDigitsFlag(self,flag):
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self._skipDigits=flag
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def GetBarGradient(self):
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""" Returns a tuple containing the gradient start and end colours. """
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if self._barGradient == None:
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return None
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return self._barGradient[0]
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def SetBarGradient(self, gradient = None):
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"""
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Sets the bar gradient. This overrides the BarColour.
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:param `gradient`: a tuple containing the gradient start and end colours.
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"""
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if gradient == None:
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self._barGradient = None
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else:
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if type(gradient) != type([]):
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self._barGradient = [gradient]
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else:
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self._barGradient = list(gradient)
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self.SortForDisplay()
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def GetBorderPadding(self):
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""" Gets the border padding. """
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return self._border_padding
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def SetBorderPadding(self, padding):
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"""
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Sets the border padding.
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:param `padding`: pixels between the border and the progress bar.
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"""
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self._border_padding = padding
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def GetRange(self):
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""" Returns the maximum value of the gauge. """
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return self._range
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def SetRange(self, range):
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"""
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Sets the range of the gauge. The gauge length is its
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value as a proportion of the range.
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:param `range`: The maximum value of the gauge.
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"""
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if range < 0:
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raise Exception("ERROR:\n Gauge range must be greater than 0. It was %.1f" % range)
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self._range = range
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def GetValue(self):
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""" Returns the current position of the gauge. """
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return self._value[0]
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def SetValue(self, value):
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""" Sets the current position of the gauge. """
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if type(value) != type([]):
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self._value = [value]
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else:
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self._value = list(value)
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self.SortForDisplay()
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self.Refresh()
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for v in self._value:
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if v < 0 or v > self._range:
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raise Exception("ERROR:\n Gauge value must be between 0 and it's range. ")
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def OnEraseBackground(self, event):
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"""
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Handles the ``wx.EVT_ERASE_BACKGROUND`` event for L{PyGauge}.
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:param `event`: a `wx.EraseEvent` event to be processed.
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:note: This method is intentionally empty to reduce flicker.
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"""
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pass
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def OnPaint(self, event):
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"""
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Handles the ``wx.EVT_PAINT`` event for L{PyGauge}.
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:param `event`: a `wx.PaintEvent` event to be processed.
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"""
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dc = wx.BufferedPaintDC(self)
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rect = self.GetClientRect()
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dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
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dc.Clear()
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colour = self.GetBackgroundColour()
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dc.SetBrush(wx.Brush(colour))
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dc.SetPen(wx.Pen(colour))
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dc.DrawRectangleRect(rect)
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if self._border_colour:
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dc.SetPen(wx.Pen(self.GetBorderColour()))
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dc.DrawRectangleRect(rect)
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pad = 1 + self.GetBorderPadding()
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rect.Deflate(pad,pad)
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if self.GetBarGradient():
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for i, gradient in enumerate(self._barGradientSorted):
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c1,c2 = gradient
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w = rect.width * (float(self._valueSorted[i]) / self._range)
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r = copy.copy(rect)
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r.width = w
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dc.GradientFillLinear(r, c1, c2, wx.EAST)
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else:
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for i, colour in enumerate(self._barColourSorted):
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dc.SetBrush(wx.Brush(colour))
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dc.SetPen(wx.Pen(colour))
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w = rect.width * (float(self._valueSorted[i]) / self._range)
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r = copy.copy(rect)
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r.width = w
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dc.DrawRectangleRect(r)
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dc.SetTextForeground(wx.Colour(255,255,255))
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font1 = wx.Font(8, wx.SWISS, wx.NORMAL, wx.NORMAL)
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dc.SetFont(font1)
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if self._skipDigits == True:
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dc.DrawLabel(str(int(self._value[0]*100/self._range)) + "%", rect, wx.ALIGN_CENTER)
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else:
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dc.DrawLabel(str(round(float(self._value[0]*100/self._range)))+ "%",rect,wx.ALIGN_CENTER)
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def OnTimer(self,event):
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"""
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Handles the ``wx.EVT_TIMER`` event for L{PyGauge}.
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:param `event`: a timer event
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"""
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if self._timerId == event.GetId():
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stop_timer = True
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for i, v in enumerate(self._value):
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self._value[i] += self._update_step[i]
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if self._update_step[i] > 0:
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if self._value[i] > self._update_value[i]:
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self._value[i] = self._update_value[i]
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else: stop_timer = False
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else:
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if self._value[i] < self._update_value[i]:
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self._value[i] = self._update_value[i]
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else: stop_timer = False
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if stop_timer:
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self._timer.Stop()
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self.SortForDisplay()
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self.Refresh()
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def Update(self, value, time=0, index=0):
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"""
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Update the gauge by adding value to it over time milliseconds. Time
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must be a multiple of 50 milliseconds.
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:param `value`: The value to be added to the gauge.
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:param `time`: The length of time in ms that it will take to move the gauge
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"""
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time=abs(value)*50
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if time>500: time=500
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if time == 0: time=500
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if type(value) != type([]):
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value = [value]
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if len(value) != len(self._value):
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raise Exception("ERROR:\n len(value) != len(self.GetValue()) ")
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self._update_value = []
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self._update_step = []
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for i, v in enumerate(self._value):
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if value[i]+v < 0 or value[i]+v > self._range:
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raise Exception("ERROR2:\n Gauge value must be between 0 and it's range. ")
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self._update_value.append( value[i] +v )
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self._update_step.append( float(value[i]) / ( time/50 ) )
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#print self._update_
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if not self._timer:
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self._timer = wx.Timer(self, self._timerId)
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self._timer.Start(100)
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def SortForDisplay(self):
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""" Internal method which sorts things so we draw the longest bar first. """
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if self.GetBarGradient():
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tmp = sorted(zip(self._value,self._barGradient)); tmp.reverse()
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a,b = zip(*tmp)
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self._valueSorted = list(a)
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self._barGradientSorted = list(b)
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else:
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tmp = sorted(zip(self._value,self._barColour)); tmp.reverse()
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a,b = zip(*tmp)
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self._valueSorted = list(a)
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self._barColourSorted = list(b)
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