SVGHMI: Widget DnD to Inkscape : Added source SVG widget label parsing and pass selecte HMI subtree to XSLT tranform, so that SVG containing multiple widgets can later be matched against hmi tree fragments, in order to DnD complex groups of widgets.
// widget_button.ysl2
// Finite state machine
decl fsm(name);
decl state(name);
decl on_mouse(position);
decl on_dispatch(value);
decl jump(state);
decl show(eltname);
decl hmi_value(value);
// State machine to drive HMI_BOOL on a potentially laggy connection
const "_button_fsm" fsm {
state "init" {
on_dispatch "false" jump "released";
on_dispatch "true" jump "pressed";
}
state "pressing" {
// show "waitactive";
hmi_value "true";
on_dispatch "true" jump "pressed";
on_mouse "up" jump "shortpress";
}
state "pressed" {
show "active";
on_mouse "up" jump "releasing";
on_dispatch "false" jump "released";
}
state "shortpress" {
on_dispatch "true" jump "releasing";
on_mouse "down" jump "pressing";
}
state "releasing" {
// show "waitinactive";
hmi_value "false";
on_dispatch "false" jump "released";
on_mouse "down" jump "shortrelease";
}
state "released" {
show "inactive";
on_mouse "down" jump "pressing";
on_dispatch "true" jump "pressed";
}
state "shortrelease" {
on_dispatch "false" jump "pressing";
on_mouse "up" jump "releasing";
}
}
template "fsm", mode="dispatch_transition" {
| switch (this.state) {
apply "state", mode="dispatch_transition";
| }
}
template "state", mode="dispatch_transition" {
| case "«@name»":
apply "on-dispatch";
| break;
}
template "on-dispatch" {
| if(value == «@value») {
apply "jump", mode="transition";
| }
}
template "fsm", mode="mouse_transition" {
param "position";
| switch (this.state) {
apply "state", mode="mouse_transition" with "position", "$position";
| }
}
template "state", mode="mouse_transition" {
param "position";
| case "«@name»":
apply "on-mouse[@position = $position]";
| break;
}
template "on-mouse" {
// up or down state is already assumed because apply statement filters it
apply "jump", mode="transition";
}
template "jump", mode="transition" {
| this.state = "«@state»";
| this.«@state»_action();
}
template "fsm", mode="actions" {
apply "state", mode="actions";
}
template "state", mode="actions" {
| «@name»_action(){
//| console.log("Entering state «@name»");
apply "*", mode="actions";
| }
}
template "show", mode="actions" {
| this.display = "«@eltname»";
| this.request_animate();
}
template "hmi-value", mode="actions" {
| this.apply_hmi_value(0, «@value»);
}
template "widget[@type='Button']", mode="widget_class"{
const "fsm","exsl:node-set($_button_fsm)";
| class ButtonWidget extends Widget{
| frequency = 5;
| display = "inactive";
| state = "init";
| dispatch(value) {
// | console.log("dispatch"+value);
apply "$fsm", mode="dispatch_transition";
| }
| onmouseup(evt) {
| svg_root.removeEventListener("pointerup", this.bound_onmouseup, true);
// | console.log("onmouseup");
apply "$fsm", mode="mouse_transition" with "position", "'up'";
| }
| onmousedown(evt) {
| svg_root.addEventListener("pointerup", this.bound_onmouseup, true);
// | console.log("onmousedown");
apply "$fsm", mode="mouse_transition" with "position", "'down'";
| }
apply "$fsm", mode="actions";
| animate(){
| if (this.active_elt && this.inactive_elt) {
foreach "str:split('active inactive')" {
| if(this.display == "«.»")
| this.«.»_elt.style.display = "";
| else
| this.«.»_elt.style.display = "none";
}
| }
| }
| init() {
| this.bound_onmouseup = this.onmouseup.bind(this);
| this.element.addEventListener("pointerdown", this.onmousedown.bind(this));
| }
| }
}
template "widget[@type='Button']", mode="widget_defs" {
param "hmi_element";
optional_labels("active inactive");
}