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Gauge.spin2
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Gauge.spin2
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{
Gauge Object - Template
}
CON
DEBOUNCE_TIMER = 500
MAX_CHARACTERS = 8
'Text align constants
#0, LEFT_ALIGN, CENTER_ALIGN, RIGHT_ALIGN
VAR
'Attributes
long id 'Unique ID - (window index << 4)|(button index)
long bg_color 'background color
long fg_color 'foreground color
long ol_color 'outline = border
word xtop 'Top Left X (Pixel)
word ytop 'Top Left Y (Pixel)
word xbot 'Bottom Right X (Pixel)
word ybot 'Bottom Right Y (Pixel)
byte border_width 'Border width in pixels
'Method Pointers
long event_handler 'Default event handler method pointer
'Internal state variables
long last_time 'Stores touch event debouncer last time value
long value 'Virtual value of the widget
byte configured 'Boolean flag to identify configured widgets in the window's list
byte enabled 'Boolean flag to indicate widget can be drawn and can check for events
byte invert_border 'Boolean flag to invert border colors
'Characters variables
byte contents[MAX_CHARACTERS+1] 'Should be 1 more than the displayed characters to account for the terminating zero
long string_pointer 'Hub address of string memory (addresses are LONG but memory access in hub is byte)
byte font_size
byte padding
byte align '0 = LEFT, 1 = CENTER, 2 = RIGHT
byte compression 'compression factor for the text
'Gauge specific variables
long fill_color
long fill_hi_color 'Gauge fill color when value > hi threshold
long fill_lo_color 'Gauge fill color when value < lo threshold
long hi_threshold
long lo_threshold
long max_value
long min_value
byte header
byte show_val
OBJ
color : "Colors"
util : "Utilities"
graphics : "Graphics"
PUB null()
''+--------------------------------------------------------------------+
'' WIDGET INTERFACE METHODS
''+--------------------------------------------------------------------+
PUB set_enable(e)
if e
enabled := true
else
enabled := false
PUB draw()| w, h, x, y, tw, th
''This method draws the graphical representation of this widget type
if enabled
'FILL
graphics.fill_rectangle(xtop+border_width,ytop+border_width,xbot-border_width,ybot-border_width,bg_color)
'BORDER
util.draw_border(xtop,ytop,xbot,ybot,ol_color,border_width,invert_border)
'GAUGE
'if show_val
'draw_val()
draw_gauge()
PUB check_event(coord):is_mine | x, y
if configured AND enabled
x := coord.WORD[0]
y := coord.WORD[1]
if (x >= xtop AND x <= xbot) AND (y >= ytop AND y <= ybot)
is_mine := true
if event_handler <> 0
if (getms()-last_time) >= DEBOUNCE_TIMER 'debounce the event
event_handler(id) 'call the event handler and pass along id of button
last_time := getms() 'reset debounce timer
''+--------------------------------------------------------------------+
'' DRAWING VALUE METHODS
''+--------------------------------------------------------------------+
PUB set_value(val)|c,extra,digits,prev_digits,n,exp_val,char_val
value := val
c := 0
extra := 0
digits := util.get_digits(val)
if val == 0
BYTE[string_pointer] := $30 '0 character
digits := 1
else
repeat n from digits to 1
exp_val := util.exponent(10, n-1)
char_val := val / exp_val
val := val - char_val*exp_val
BYTE[string_pointer + (extra) + (digits-n)] := char_val + $30 'number character
BYTE[string_pointer + digits + extra] := 0 'string terminating 0
PUB draw_text(x,y)| prev_pointer, chars, n, w, h, k, k_old, xs, xe, old_chars
'Clear display
graphics.fill_rectangle(xtop+border_width, y, xbot-border_width, y+padding+header, bg_color)
'Set colors
graphics.set_background_color(bg_color)
graphics.set_foreground_color(util.red_to_green(value,min_value,max_value))
'Select font size
graphics.select_font_size(1)
w := font_size * 8
h := font_size * 8
chars := util.get_characters(string_pointer)
'Draw characters that are different from previous value
repeat n from 0 to chars-1
k := BYTE[string_pointer+n]
xs := x+(w-compression)*(n)
xe := xs + w
graphics.set_window(xs, y, xe, y+h)
graphics.draw_char(k)
PUB update_value(val)
set_value(val)
'draw_gauge()
PUB set_value_and_fill_ryg(val)
''Set value and color based on value red - yellow - green
if enabled
set_value(val)
fill_color := util.red_to_green(val,min_value,max_value)
draw_gauge()
PRI draw_val()|w,h,tw,th,x,y
w := (xbot - xtop) - 2*border_width
h := (ybot - ytop) - 2*border_width
tw := util.get_text_width(string_pointer, font_size, compression)
th := util.get_text_height(font_size)
x := xtop + border_width + (w - tw)/2
y := ytop + border_width + padding' (padding - th)/2
draw_text(x,y)
PRI draw_gauge()|x, y, ym, c
if show_val
draw_val()
c := fill_color
ym := ytop + border_width '((show_val==true) ? (header+padding) : 0)
if show_val
ym := ym + padding + header
x := xtop+border_width + padding
y := (ym) #> util.scale(value, 0, 100, ybot-border_width, ym) <# (ybot-border_width)
graphics.fill_rectangle(x, ym, xbot-padding-border_width, y, bg_color)
graphics.fill_rectangle(x, y, xbot-padding-border_width, ybot-border_width, c)
''+--------------------------------------------------------------------+
'' CONFIGURATION METHODS
''+--------------------------------------------------------------------+
PUB configure(i, xt, yt, w, h, bg, fg, ol)
id := i
xtop := xt
ytop := yt
xbot := w + xt 'xb
ybot := h + yt 'yb
bg_color := bg
fg_color := fg
ol_color := ol
border_width := 1
invert_border := true
font_size := 1
show_val := true
header := 8
padding := 0
compression := 0
align := CENTER_ALIGN
string_pointer := @contents
set_value(0)
min_value := 0
max_value := 100
hi_threshold := 80
lo_threshold := 40
fill_color := color.blue
fill_hi_color := color.green
fill_lo_color := color.red
configured := true
last_time := getms()
PUB is_configured():conf
conf := configured
PUB set_coordinates(xt, yt, xb, yb)
xtop := xt
ytop := yt
xbot := xb
ybot := yb
PUB get_coordinates() : coords
coords.BYTE[0] := xtop
coords.BYTE[1] := ytop
coords.BYTE[2] := xbot
coords.BYTE[3] := ybot
PUB set_colors(bg, fg, ol)
bg_color := bg
fg_color := fg
ol_color := ol
PUB get_colors(): bg, fg, ol
bg := bg_color
fg := fg_color
ol := ol_color
PUB set_gauge_colors(fc,hc,lc)
fill_color := fc
fill_hi_color := hc
fill_lo_color := lc
PUB set_limits(minv, maxv, l, h)
min_value := minv
max_value := maxv
hi_threshold := h
lo_threshold := l
''+--------------------------------------------------------------------+
'' EVENT HANDLING METHODS
''+--------------------------------------------------------------------+
PUB set_event_handler(Method)
event_handler := Method 'Sets the default event handler of this object
PUB call_event_handler(Method)
Method(id) 'Calls a passed event handler
''+--------------------------------------------------------------------+
'' OTHER METHODS
''+--------------------------------------------------------------------+
PUB set_border_width(bw)
border_width := bw
PUB set_contents(addr)|c,i
'Set new contents
repeat i from 0 to MAX_CHARACTERS-1 'Reserve last character place for the terminating 0
c := BYTE[addr][i]
if c <> 0
contents[i] := c
else
quit
contents[i+1] := 0
'string_pointer := @contents
PUB enable_val(v)
show_val := v