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require 'date'
require 'time'
require 'SVG/Graph/Plot'
module SVG
module Graph
class RoomSchedule < Graph
# In addition to the defaults set by Graph::initialize and
# Plot::set_defaults, sets:
# [x_label_format] '%Y-%m-%d %H:%M:%S'
# [popup_format] '%Y-%m-%d %H:%M:%S'
def set_defaults
init_with(
:x_label_format => '%Y-%m-%d %H:%M:%S',
:popup_format => '%Y-%m-%d %H:%M:%S',
:scale_x_divisions => false,
:scale_x_integers => false,
:bar_gap => true
)
end
# The format string use do format the X axis labels.
# See Time::strformat
attr_accessor :x_label_format
# Use this to set the spacing between dates on the axis. The value
# must be of the form
# "\d+ ?(days|weeks|months|years|hours|minutes|seconds)?"
#
# EG:
#
# graph.timescale_divisions = "2 weeks"
#
# will cause the chart to try to divide the X axis up into segments of
# two week periods.
attr_accessor :timescale_divisions
# The formatting used for the popups. See x_label_format
attr_accessor :popup_format
attr_accessor :scale_x_divisions
attr_accessor :scale_x_integers
attr_accessor :bar_gap
protected
def format x, y
Time.at( x ).strftime( popup_format )
end
def get_x_labels
rv = get_x_values.collect { |v| v.strftime( x_label_format ) }
end
def y_label_offset( height )
height / -2.0
end
def get_y_labels
@data.map {|room| room[:title] }
end
def draw_data
bargap = bar_gap ? (field_height < 10 ? field_height / 2 : 10) : 0
subbar_height = field_height - bargap
field_count = 1
y_mod = (subbar_height / 2) + (font_size / 2)
min,max,div = x_range
scale = (@graph_width) / (max - min).to_f
@data.each do |room|
room[:data].each do |entry|
x_start = (entry.start_time - min).to_f
x_end = (entry.end_time - min).to_f
y = @graph_height - (field_height * field_count)
bar_width = (x_end - x_start) * scale
bar_start = x_start * scale
@graph.add_element( "rect", {
"x" => bar_start.to_s,
"y" => y.to_s,
"width" => bar_width.to_s,
"height" => subbar_height.to_s,
"class" => "fill#{field_count+1}"
})
t = @graph.add_element("text", {
"x" => (bar_start + @font_size / 2).to_s,
"y" => (y + 2 * @font_size).to_s,
})
t.add_text(entry.title)
end
field_count += 1
end
end
def get_css
return <<EOL
/* default fill styles for multiple datasets (probably only use a single dataset on this graph though) */
.key1,.fill1{
fill: #ff0000;
fill-opacity: 0.5;
stroke: none;
stroke-width: 0.5px;
}
.key2,.fill2{
fill: #0000ff;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key3,.fill3{
fill: #00ff00;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key4,.fill4{
fill: #ffcc00;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key5,.fill5{
fill: #00ccff;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key6,.fill6{
fill: #ff00ff;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key7,.fill7{
fill: #00ffff;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key8,.fill8{
fill: #ffff00;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key9,.fill9{
fill: #cc6666;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key10,.fill10{
fill: #663399;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key11,.fill11{
fill: #339900;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key12,.fill12{
fill: #9966FF;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
EOL
end
private
def timescale_unit
if timescale_divisions
timescale_divisions =~ /(\d+) ?(days|weeks|hours|minutes|seconds)?/
division_units = $2 ? $2 : "days"
amount = $1.to_i
unit = nil
case division_units
when "weeks"
unit = 7
when "days"
unit = 1
when "hours"
unit = (1.0 / 24)
when "minutes"
unit = (1.0 / 1440)
when "seconds"
unit = (1.0 / 86400)
end
end
[ amount, unit ]
end
def x_range
max_value = @data.map {|room| room[:data].map {|e| e.end_time}.max}.max
min_value = @data.map {|room| room[:data].map {|e| e.start_time}.min}.min
amount, unit = timescale_unit
max_value += unit * (amount - (max_value.min % amount))
range = max_value - min_value
right_pad = 0 #range == 0 ? 10 : range / 20.0
scale_range = (max_value + right_pad) - min_value
scale_division = scale_x_divisions || (scale_range / 10.0)
if scale_x_integers
scale_division = scale_division < 1 ? 1 : scale_division.round
end
[min_value, max_value, scale_division]
end
def get_x_values
rv = []
min, max, scale_division = x_range
if timescale_divisions
amount, unit = timescale_unit
min.step( max, amount * unit) {|v| rv << v} if amount
return rv
end
min.step(max, scale_division) {|v| rv << v}
return rv
end
end
end
end
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