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gui.battery-gauge.spin
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gui.battery-gauge.spin
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{
--------------------------------------------
Filename: gui.battery-gauge.spin
Author: Jesse Burt
Description: Battery gauge GUI widget
Copyright (c) 2023
Started Jun 16, 2023
Updated Jun 16, 2023
See end of file for terms of use.
--------------------------------------------
Requirements:
a display driver that provides the following interfaces:
con MAX_COLOR = xxx (xxx is the maximum possible color value the driver supports)
pub box(sx, sy, ex, ey, color, fill_flag)
pub line(sx, sy, ex, ey, color)
build-time symbol DISP_DRIVER defined with the display driver filename
Example:
flexspin -DDISP_DRIVER=\"display.lcd.st7735\" -DST7789 -DGFX_DIRECT app.spin
(define DISP_DRIVER as the driver filename
Operational overview:
This object is first initialized with a pointer to your display driver's object
The battery gauge can then be drawn in either horizontal ( draw_horiz() ) or
vertical orientation ( draw_vert() ), respectively. The parameter is the
state of charge in whole percent (0..100).
The following attributes can optionally be changed:
set_bg_color(): set gauge inside fill/background color
set_bar_color(): set gauge bars color
set_outline_color(): set outline color of gauge
set_posxy(): set screen position of gauge
set_scale(): set drawing scale factor of gauge (whole numbers >= 1)
The defaults are:
* color 0 background (usually black)
* the display's MAX_COLOR as the gauge outline color
* screen position (0, 0)
* scale factor 1
Example:
obj
lcd: DISP_DRIVER
batt_gauge: "gui.battery-gauge"
pub main()
batt_gauge.attach_display_driver(@lcd)
' or the following, for short:
' batt_gauge.attach(@lcd)
}
con
{ battery image basic dimensions }
BWID = 4
BLEN = 10
obj
{ virtual instance of display driver }
disp= DISP_DRIVER
var
{ pointer to display driver object }
long _driver
{ batt gauge attributes }
long _bar_color, _bg_color, _outline_color
word _sx, _sy
byte _scale
pub attach = attach_display_driver
pub attach_display_driver(ptr)
' Attach to a display driver instance
' ptr: pointer to display driver object
_driver := ptr
{ set some defaults so settings methods don't have to be called }
_bar_color := disp[_driver].MAX_COLOR
_bg_color := 0
_outline_color := disp[_driver].MAX_COLOR
_sx := _sy := 0
_scale := 1
pub draw_horiz(soc) | len, wid, i, in_rt, in_t, in_b, in_lt
' Show battery gauge (horizontal)
' soc: state of charge to indicate, in percent
wid := (BWID * _scale) ' width/diameter and
len := 11 #> (BLEN * _scale) ' length of battery icon
in_lt := (_sx + 1)
in_rt := (_sx + len)-1
in_t := (_sy + 1)
in_b := (_sy + wid-1)
{ battery outline, tip, inside fill }
disp[_driver].box( _sx, _sy, ...
_sx+len, _sy+wid, ...
_outline_color, false )
disp[_driver].box( in_rt+1, in_t+(wid/4), ...
in_rt+1+_scale, in_b-(wid/4), ...
_outline_color, true )
disp[_driver].box( in_lt, in_t, ...
in_rt, in_b, ...
_bg_color, true )
{ battery SoC }
soc /= 10
if ( soc ) ' don't waste time with the below if SoC is 0
repeat i from 0 to soc-1
if ( _scale > 1 )
disp[_driver].box( in_lt + (i * _scale), (in_t + 1), ...
(in_lt + ((i+1) * _scale)-2), (in_b-1), ...
_bar_color, true )
else
disp[_driver].line( in_lt + i, in_t, ...
in_lt + i, in_b, ...
_bar_color )
pub draw_vert(soc) | wid, len, in_lt, in_rt, in_b, in_t, i
' Show battery gauge (vertical)
' soc: state of charge to indicate, in percent
wid := (BWID * _scale)
len := 11 #> (BLEN * _scale)
in_lt := (_sx + 1)
in_rt := (_sx + wid-1)
in_t := (_sy + _scale + 1)
in_b := (_sy + _scale + len-1)
{ battery tip, outline, fill }
disp[_driver].box( in_lt+(wid/4), _sy, ...
in_rt-(wid/4), _sy+_scale, ...
_outline_color, true )
disp[_driver].box( _sx, _sy+_scale, ...
_sx+wid, _sy+_scale+len, ...
_outline_color, false )
disp[_driver].box( in_lt, in_t, ...
in_rt, in_b, ...
_bg_color, true )
{ battery SoC }
soc /= 10
if ( soc ) ' don't waste time with the below if SoC is 0
repeat i from 0 to soc-1
if ( _scale > 1 )
disp[_driver].box( in_lt+1, (in_b - ((i+1) * _scale)+2), ...
in_rt-1, (in_b - (i * _scale)), ...
_bar_color, true )
else
disp[_driver].line( in_lt, in_b-i, ...
in_rt, in_b-i, ...
_bar_color )
pub set_bg_color(c)
' Set battery inside background/fill color
_bg_color := c
pub set_bar_color(c)
' Set battery state of charge bar color
_bar_color := c
pub set_outline_color(c)
' Set battery outline color
_outline_color := c
pub set_posxy(x, y)
' Set upper-left screen position of battery gauge
_sx := x
_sy := y
pub set_scale(s)
' Set drawing scale factor
_scale := 1 #> s ' clamp to minimum of 1
DAT
{
Copyright 2023 Jesse Burt
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
}