/
colorpicker.opa
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colorpicker.opa
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/*
Copyright © 2011 MLstate
This file is part of OPA.
OPA is free software: you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License, version 3, as published by
the Free Software Foundation.
OPA is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
more details.
You should have received a copy of the GNU Affero General Public License
along with OPA. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* A configurable colorpicker widget.
*
* @category WIDGET
* @author Hugo Heuzard, 2011
*/
import stdlib.widgets.{core,slider}
/**
* {1 Types defined in this module}
*/
type WColorpicker.config = {
on_select: color -> void
size: (int,int)
mode: WColorpicker.mode
display: WColorpicker.display
style: WColorpicker.style
initial: Color.color
}
type WColorpicker.style = {
cursor : WStyler.styler
thumb : WStyler.styler
thumb_over : WStyler.styler
thumb_dragged : WStyler.styler
gauge : WStyler.styler
preview : WStyler.styler
}
type WColorpicker.display =
{full}
/ {preview}
type WColorpicker.mode =
// {value}
// / {hue}
{saturation}
WColorpicker = {{
@private
map_saturation_overlay = @static_resource("stdlib/widgets/colorpicker/resource/map-saturation-overlay.png")
@private
map_saturation = @static_resource("stdlib/widgets/colorpicker/resource/map-saturation.png")
@private
bar_saturation = @static_resource("stdlib/widgets/colorpicker/resource/bar-saturation.png")
@private
parameters = { consumption={unlimited}; expiration={none}; visibility={shared} }
@private @publish
url_map_saturation_overlay = DynamicResource.publish(map_saturation_overlay,parameters)
@private @publish
url_map_saturation = DynamicResource.publish(map_saturation,parameters)
@private @publish
url_bar_saturation = DynamicResource.publish(bar_saturation,parameters)
/**
* {1 Configuration}
*/
@private
default_thumb_css = css {
height:14px;
width:5px;
border:2px double black;
top:-2px;
position:absolute;
}
@private
default_thumb_over_css = css {
height:14px;
width:5px;
border:2px double #ccc;
top:-2px;
position:absolute;
}
@private
default_thumb_dragged_css = css {
height:14px;
width:5px;
border:2px double #ccc;
top:-2px;
position:absolute;
}
@private
default_gauge_css = css {
position: relative;
width:256px;
height:16px;
border:1px double #bbb;
}
default_config_style = {
cursor= WStyler.make_style(css { height:10px; width:10px; border:2px double black;})
thumb = WStyler.make_style(default_thumb_css)
thumb_over = WStyler.make_style(default_thumb_over_css)
thumb_dragged = WStyler.make_style(default_thumb_dragged_css)
gauge = WStyler.make_style(default_gauge_css)
preview = WStyler.make_style(css { height:50px; width:50px; border:1px double black;})
}
default_config : WColorpicker.config = {
size = (256,256)
mode = {saturation}
on_select = c -> Log.info("WColorpicker", Color.color_to_string(c))
display = {preview}
style = default_config_style
initial = Color.blue
}
/**
* {1 High-level interface}
*/
@private @both
on_change(id,config)(s) =
on_change_client(id,config,s)
@private @client
on_change_client(id,config,s) =
overlay_id="{id}_overlay"
range_id2="{id}_range2"
bg_id="{id}_bg"
s = Int.to_float(s) / 100.
_ = Dom.set_style_property_unsafe(#{overlay_id},"opacity","{s}")
_ = Dom.set_value(#{range_id2}, "{s}")
_ = set_color_hsv(id, config, {Color.to_hsv(Color.of_string(Dom.get_text(#{bg_id})) |> Option.get) with s=(1.-s)})
void
html(id : string, config : WColorpicker.config) : xhtml =
map_id="{id}_map"
overlay_id="{id}_overlay"
preview_id="{id}_preview"
range_id="{id}_range"
range_id2="{id}_range2"
cursor_id = "{id}_cursor"
content_id= "{id}_content"
bg_id="{id}_bg"
range_config = { WSlider.default_config with
on_change = on_change(id,config)
on_release = on_change(id,config)
range = (1,100)
step = 1
style = {
thumb=config.style.thumb
thumb_over=config.style.thumb_over
thumb_dragged=config.style.thumb_dragged
gauge=WStyler.merge([config.style.gauge,WStyler.make_style(css {width:{config.size.f1}px})])}}
range = WSlider.html(range_config, range_id)
cursor = <div onready={_ -> set_color(id,config,config.initial,false)} id="{cursor_id}" style="z-index:4;position:relative;"></div> |> WStyler.add(config.style.cursor,_)
action(ev) =
d = Dom.Dimension.sub(ev.mouse_position_on_page,Dom.get_offset(#{map_id}))
x_px = if d.x_px < 0 then 0 else if d.x_px > 255 then 255 else d.x_px
y_px = if d.y_px < 0 then 0 else if d.y_px > 255 then 255 else d.y_px
d = ~{x_px y_px}
s = (1.-Float.of_string(Dom.get_value(#{range_id2})))
v = Int.to_float(config.size.f2 - (d.y_px)) / Int.to_float(config.size.f2)
h = Int.to_float((d.x_px)) / Int.to_float(config.size.f1)
set_color_hsv(id,config,~{h s v})
preview = match config.display with
| {full} -> <div id="{preview_id}"></div> |> WStyler.add(config.style.preview,_)
| {preview} -> <div onclick={_ -> Dom.toggle(#{content_id})} id="{preview_id}"></div> |> WStyler.add(config.style.preview,_)
<div id={id}>
{preview}
<div id={content_id} style={[match config.display with {preview} -> {display={css_none}} _ -> {display={block}} ]} >
<div id={map_id} style="z_index:5;width:{config.size.f1}px;height:{config.size.f2}px"
onclick={_-> void}
onmousedown={e ->_ = action(e) _ = Dom.bind(#{map_id},{mousemove},action) void }
onmouseup={_ -> _ = Dom.unbind_event(#{map_id},{mousemove}); _ = config.on_select(get_color(id , config )); void } >
<img src="{match config.mode with | {saturation} -> url_map_saturation}"
style="width:{config.size.f1}px;height:{config.size.f2}px;z-index:1;display:block;margin:0px;padding:0px" />
<img onmousedown={_ -> void} onclick={_-> void} onmousemove={_ -> void} id="{overlay_id}" src="{match config.mode with | {saturation} -> url_map_saturation_overlay}"
style="width:{config.size.f1}px;height:{config.size.f2}px;z_index:2;display:block;margin:Opx;padding:0px;margin-top:-{config.size.f2}px;opacity:0.0;" />
{cursor}
</div>
<input id="{range_id2}" type="text" style="display:none;" value="0" />
<div id="{bg_id}" type="text" style="display:none;">{Color.color_to_string(config.initial)}</div>
{range}
</div>
</div>
get_color(id : string, _config : WColorpicker.config) : Color.color =
bg_id="{id}_bg"
Color.of_string(Dom.get_text(#{bg_id})) |> Option.get
@private
set_color_hsv(id : string, config : WColorpicker.config, {~h ~s ~v} : Color.color_hsv ) : void =
preview_id="{id}_preview"
range_id="{id}_range"
cursor_id = "{id}_cursor"
bg_id="{id}_bg"
c = Color.of_hsv(~{h s v})
c2 = Color.of_hsv(~{h s=1. v=1.})
tmp = "{range_id}_gauge"
_ = Dom.set_style(#{tmp}, [{background = Css_build.sum_background(Css_build.background_color(c2), Css_build.background_image(Url.make(url_bar_saturation)))}])
_ = Dom.set_style(#{preview_id}, [{background = Css_build.background_color(c)}])
(cursor_w,cursor_h) = (Dom.get_width(#{cursor_id}),Dom.get_width(#{cursor_id}))
mtop=Int.of_float((-v)*Int.to_float(config.size.f2)-Int.to_float(cursor_h/2))
mleft=Int.of_float(h*Int.to_float(config.size.f1) - Int.to_float(cursor_w/2))
_ = Dom.set_style(#{cursor_id}, [{top={px=mtop }},{left={px=mleft}}])
_ = Dom.set_text(#{bg_id},Color.color_to_string(c))
void
set_color(id : string, config : WColorpicker.config, color : Color.color, notify : bool) : void =
hsv = Color.to_hsv(color)
// todo set the slider value
_ = set_color_hsv(id,config,hsv)
if notify
then _ = config.on_select(get_color(id , config )) void
else void
}}