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|
#----------------------------------------------------------------------
# Name: wx.lib.gizmos.ledctrl
# Purpose:
#
# Author: Robin Dunn
#
# Created: 26-Oct-2017
# Copyright: (c) 2017-2020 by Total Control Software
# Licence: wxWindows license
# Tags:
#----------------------------------------------------------------------
"""
Widget to display a series of digits, spaces, dashes or colons in a segmented style.
"""
import wx
LED_ALIGN_LEFT = 0x01
LED_ALIGN_RIGHT = 0x02
LED_ALIGN_CENTER = 0x04
LED_ALIGN_MASK = 0x07
LED_DRAW_FADED = 0x08
class LEDNumberCtrl(wx.Control):
"""
The LEDNumberCtrl can be used to display a series of digits, (plus spaces,
colons or dashes,) using a style reminiscent of old-timey segmented
digital displays.
"""
# constants used internally
class const:
LINE1 = 1
LINE2 = 2
LINE3 = 4
LINE4 = 8
LINE5 = 16
LINE6 = 32
LINE7 = 64
DECIMALSIGN = 128
COLON = 256
DIGITS = {
'0': LINE1 | LINE2 | LINE3 | LINE4 | LINE5 | LINE6,
'1': LINE2 | LINE3,
'2': LINE1 | LINE2 | LINE4 | LINE5 | LINE7,
'3': LINE1 | LINE2 | LINE3 | LINE4 | LINE7,
'4': LINE2 | LINE3 | LINE6 | LINE7,
'5': LINE1 | LINE3 | LINE4 | LINE6 | LINE7,
'6': LINE1 | LINE3 | LINE4 | LINE5 | LINE6 | LINE7,
'7': LINE1 | LINE2 | LINE3,
'8': LINE1 | LINE2 | LINE3 | LINE4 | LINE5 | LINE6 | LINE7,
'9': LINE1 | LINE2 | LINE3 | LINE6 | LINE7,
'-': LINE7,
':': COLON,
}
DIGITALL = 0xFFFF
def __init__(self, *args, **kw):
"""
Create a new LEDNumberCtrl.
Both the normal constructor style with all parameters, or wxWidgets
2-phase style default constructor is supported. If the default
constructor is used then the Create method will need to be called
later before the widget can actually be used.
"""
if not args and not kw:
self._init_default()
else:
self._init_full(*args, **kw)
def _init_default(self):
super(LEDNumberCtrl, self).__init__()
self._init()
def _init_full(self, parent, id=wx.ID_ANY,
pos=wx.DefaultPosition, size=wx.DefaultSize,
style=LED_ALIGN_LEFT|LED_DRAW_FADED, name='ledctrl'):
super(LEDNumberCtrl, self).__init__(parent, id, pos, size, style, name=name)
self._init()
self._post_create()
def Create(self, parent, id=wx.ID_ANY,
pos=wx.DefaultPosition, size=wx.DefaultSize,
style=LED_ALIGN_LEFT|LED_DRAW_FADED, name='ledctrl'):
super(LEDNumberCtrl, self).Create(parent, id, pos, size, style, name=name)
return self._post_create()
def _init(self):
# set default attributes
self.m_alignment = LED_ALIGN_LEFT
self.m_lineMargin = -1
self.m_digitMargin = -1
self.m_lineLength = -1
self.m_lineWidth = -1
self.m_drawFaded = False
self.m_leftStartPos = -1
self.m_value = ''
def _post_create(self):
self.SetBackgroundColour(wx.BLACK)
self.SetForegroundColour(wx.GREEN)
self.SetBackgroundStyle(wx.BG_STYLE_PAINT)
# flags
style = self.GetWindowStyle()
if style & LED_DRAW_FADED:
self.SetDrawFaded(True)
if style & LED_ALIGN_MASK:
self.SetAlignment(style & LED_ALIGN_MASK)
# event bindings
self.Bind(wx.EVT_ERASE_BACKGROUND, lambda evt: None)
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.Bind(wx.EVT_SIZE, self.OnSize)
return True
def GetAlignment(self):
return self.m_alignment
def GetDrawFaded(self):
return self.m_drawFaded
def GetValue(self):
return self.m_value
def SetAlignment(self, alignment, redraw=True):
"""
Set how the digits will be aligned within the widget.
Supported values are ``LED_ALIGN_LEFT``, ``LED_ALIGN_RIGHT``,
and ``LED_ALIGN_CENTER``.
"""
if alignment != self.m_alignment:
self.m_alignment = alignment
self._recalcInternals()
if redraw:
self.Refresh(False)
def SetDrawFaded(self, drawFaded, redraw=True):
"""
Set whether unlit segments will still be draw with a faded version of
the foreground colour.
"""
if drawFaded != self.m_drawFaded:
self.m_drawFaded = drawFaded
if redraw:
self.Refresh(False)
def SetValue(self, value, redraw=True):
"""
Set the string value to be displayed.
"""
if value != self.m_value:
for ch in value:
assert ch in '0123456789-.: ', "LEDNumberCtrl can only display numeric string values."
self.m_value = value
self._recalcInternals()
if redraw:
self.Refresh(False)
Alignment = property(GetAlignment, SetAlignment)
DrawFaded = property(GetDrawFaded, SetDrawFaded)
Value = property(GetValue, SetValue)
def OnSize(self, evt):
wx.CallAfter(self._recalcInternals)
evt.Skip()
def OnPaint(self, evt):
c = self.const
dc = wx.AutoBufferedPaintDC(self)
# Draw the background
dc.SetBrush(wx.Brush(self.GetBackgroundColour(), wx.BRUSHSTYLE_SOLID))
dc.DrawRectangle(wx.Rect((0, 0), self.GetClientSize()))
# Iterate the digits and draw each
offset = 0
for i, ch in enumerate(self.m_value):
i -= offset
# Draw faded lines if wanted.
if self.m_drawFaded and ch != '.':
self._drawDigit(dc, c.DIGITALL, i)
if ch == '.':
# draw the decimal point in the previous segment
self._drawDigit(dc, c.DECIMALSIGN, i-1)
offset += 1
elif ch == ' ':
# skip spaces
continue
else:
self._drawDigit(dc, c.DIGITS[ch], i)
def _recalcInternals(self):
clientWidth, height = self.GetClientSize()
self.m_lineMargin = max(1, int(height * 0.075))
self.m_lineLength = max(1, int(height * 0.275))
self.m_lineWidth = self.m_lineMargin
self.m_digitMargin = self.m_lineMargin * 4
# Count the number of characters in the string; '.' characters are not
# included because they do not take up space in the display
count = 0
for ch in self.m_value:
if ch != '.':
count += 1
valueWidth = (self.m_lineLength + self.m_digitMargin) * count
if self.m_alignment == LED_ALIGN_LEFT:
self.m_leftStartPos = (self.m_lineMargin * 3)
elif self.m_alignment == LED_ALIGN_RIGHT:
self.m_leftStartPos = clientWidth - valueWidth - (self.m_lineMargin * 3)
elif self.m_alignment == LED_ALIGN_CENTER:
self.m_leftStartPos = int((clientWidth - valueWidth) / 2)
else:
raise AssertionError("Unknown alignment value for LEDNumberCtrl.")
def _drawDigit(self, dc, digit, column):
lineColor = self.GetForegroundColour()
c = self.const
if digit == c.DIGITALL:
R = int(lineColor.Red() / 8)
G = int(lineColor.Green() / 8)
B = int(lineColor.Blue() / 8)
lineColor.Set(R, G, B)
XPos = self.m_leftStartPos + column * (self.m_lineLength + self.m_digitMargin)
# Create a pen and draw the lines.
dc.SetPen(wx.Pen(lineColor, self.m_lineWidth))
if digit & c.LINE1:
dc.DrawLine(XPos + self.m_lineMargin * 2, self.m_lineMargin * 2,
XPos + self.m_lineLength + self.m_lineMargin * 2, self.m_lineMargin * 2)
if digit & c.LINE2:
dc.DrawLine(XPos + self.m_lineLength + self.m_lineMargin * 3, self.m_lineMargin * 3,
XPos + self.m_lineLength + self.m_lineMargin * 3, self.m_lineLength + (self.m_lineMargin * 3))
if digit & c.LINE3:
dc.DrawLine(XPos + self.m_lineLength + self.m_lineMargin * 3, self.m_lineLength + (self.m_lineMargin * 5),
XPos + self.m_lineLength + self.m_lineMargin * 3, self.m_lineLength * 2 + (self.m_lineMargin * 5))
if digit & c.LINE4:
dc.DrawLine(XPos + self.m_lineMargin * 2, self.m_lineLength * 2 + (self.m_lineMargin * 6),
XPos + self.m_lineLength + self.m_lineMargin * 2, self.m_lineLength * 2 + (self.m_lineMargin * 6))
if digit & c.LINE5:
dc.DrawLine(XPos + self.m_lineMargin, self.m_lineLength + (self.m_lineMargin * 5),
XPos + self.m_lineMargin, self.m_lineLength * 2 + (self.m_lineMargin * 5))
if digit & c.LINE6:
dc.DrawLine(XPos + self.m_lineMargin, self.m_lineMargin * 3,
XPos + self.m_lineMargin, self.m_lineLength + (self.m_lineMargin * 3))
if digit & c.LINE7:
dc.DrawLine(XPos + self.m_lineMargin * 2, self.m_lineLength + (self.m_lineMargin * 4),
XPos + self.m_lineMargin * 2 + self.m_lineLength, self.m_lineLength + (self.m_lineMargin * 4))
if digit & c.DECIMALSIGN:
dc.DrawLine(XPos + self.m_lineLength + self.m_lineMargin * 4, self.m_lineLength * 2 + (self.m_lineMargin * 6),
XPos + self.m_lineLength + self.m_lineMargin * 4, self.m_lineLength * 2 + (self.m_lineMargin * 6))
if digit & c.COLON:
dc.SetBrush(wx.Brush(lineColor))
centerX = XPos + (self.m_lineLength + self.m_digitMargin) // 2
radius = self.m_lineWidth // 2
dc.DrawCircle(centerX, (self.m_lineLength + (self.m_lineMargin * 4)) // 2, radius)
dc.DrawCircle(centerX, (self.m_lineLength * 2 + (self.m_lineMargin * 6)) * 3 // 4, radius)
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