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clean up old versions of schematic tool from static/js

parent 6498c886
Showing with 0 additions and 1587 deletions
js/schematic.js-old deleted 100644 → 0
//////////////////////////////////////////////////////////////////////////////
//
// Simple schematic capture
//
////////////////////////////////////////////////////////////////////////////////
// Chris Terman, Nov. 2011
// add schematics to a document with
//
// <input type="hidden" class="schematic" name="unique_form_id" value="...schematic/netlist info..." .../>
//
// other attributes you can add to the input tag:
// width -- width in pixels of diagram
// height -- height in pixels of diagram
// parts -- comma-separated list of parts for parts bin (see parts_map)
// TO DO:
// - read initial diagram from value of hidden input field
// - write diagram state into value of hidden input field
// - wire labels?
// - devices: diode, nfet, pfet, opamp, scope probe
// - icons for test equipment? (scope, sig gen, counter, ...)
// - rotate multiple objects around their center of mass
// - rubber band wires when moving components
// - add help messages/tooltips
// - tool bar (zoom in/zoom out, rotate, mode: wire/select, save/restore, simulate, help)
// - scroll canvas
// - freeze_diagram, freeze_properties attributes (freeze certain components/properties?)
// - add thumb to resize work area
// - label nodes, extract component netlist
// - simulation: operating points, trans, ac analysis, sweeps?
// - how to integrate plot display?
// add ourselves to the tasks that get performed when window is loaded
window.onload = add_schematic_handler(window.onload);
function update_schematics() {
// set up each schematic on the page
var schematics = document.getElementsByClassName('schematic');
for (var i = schematics.length - 1; i >= 0; i--)
if (schematics[i].getAttribute("loaded") != "true") {
new Schematic(schematics[i]);
schematics[i].setAttribute("loaded","true");
}
}
function add_schematic_handler(other_onload) {
return function() {
// execute othe onload functions first
if (other_onload) other_onload();
update_schematics();
}
}
background_style = 'rgb(200,255,200)';
element_style = 'rgb(255,255,255)';
// list of all the defined parts
parts_map = {
'g': Ground,
'v': VSource,
'i': ISource,
'r': Resistor,
'c': Capacitor,
'l': Inductor,
};
///////////////////////////////////////////////////////////////////////////////
//
// Schematic = diagram + parts bin + status area
//
////////////////////////////////////////////////////////////////////////////////
// setup a schematic by populating the <div> with the appropriate children
function Schematic(input) {
var div = document.createElement('div');
// set up div so we can position elements inside of it
div.style.position = 'relative';
// grab attributes from the <div> that created us
this.div = div;
this.grid = 8;
this.scale = 2;
this.origin_x = 0;
this.origin_y = 0;
// start with a background element with normal positioning
this.background = document.createElement('canvas');
this.background.style.backgroundColor = background_style;
this.status_div = document.createElement('div');
this.status_div.style.borderStyle = 'solid';
this.status_div.style.borderWidth = '1px';
this.status_div.style.position = 'absolute';
this.status_div.style.padding = '2px';
this.status_div.style.backgroundColor = element_style;
this.status = document.createTextNode('Ready.');
this.status_div.appendChild(this.status);
this.connection_points = new Array(); // location string => list of cp's
this.components = [];
// this is where schematic is rendered
this.canvas = document.createElement('canvas');
this.canvas.tabIndex = 1; // so we get keystrokes
this.canvas.style.borderStyle = 'solid';
this.canvas.style.borderWidth = '1px';
this.canvas.style.position = 'absolute';
this.canvas.schematic = this;
this.canvas.addEventListener('mousemove',this.mouse_move,false);
this.canvas.addEventListener('mouseover',this.mouse_enter,false);
this.canvas.addEventListener('mouseout',this.mouse_leave,false);
this.canvas.addEventListener('mousedown',this.mouse_down,false);
this.canvas.addEventListener('mouseup',this.mouse_up,false);
this.canvas.addEventListener('dblclick',this.double_click,false);
this.canvas.addEventListener('keydown',this.key_down,false);
this.canvas.addEventListener('keypress',this.key_press,false);
// make the canvas "clickable" by registering a dummy click handler
// this should make things work on the iPad
this.canvas.addEventListener('click',function(){},false);
this.dragging = false;
this.drawCursor = false;
this.cursor_x = 0;
this.cursor_y = 0;
this.draw_cursor = null;
this.select_rect = null;
this.wire = null;
// repaint simply draws this buffer and then adds selected elements on top
this.bg_image = document.createElement('canvas');
// use user-supplied list of parts if supplied
// else just populate parts bin with all the parts
var parts = input.getAttribute('parts');
if (parts) parts = parts.split(',');
else {
parts = new Array();
for (var p in parts_map) parts.push(p);
}
// now add the parts to the parts bin
var parts_left = this.width + 3 + background_margin;
var parts_top = background_margin;
this.parts_bin = [];
for (var i = 0; i < parts.length; i++) {
var part = new Part(this);
part.set_component(new parts_map[parts[i]](part,0,0,0));
this.parts_bin.push(part);
}
// add all elements to the DOM
div.appendChild(this.background);
div.appendChild(this.canvas);
div.appendChild(this.status_div);
for (var i = 0; i < this.parts_bin.length; i++)
div.appendChild(this.parts_bin[i].canvas);
input.parentNode.insertBefore(div,input.nextSibling);
// make sure other code can find us!
input.schematic = this;
this.input = input;
// set locations of all the elements in the editor
var w = parseInt(input.getAttribute('width'));
var h = parseInt(input.getAttribute('height'));
this.set_locations(w,h);
}
background_margin = 5;
part_w = 56; // size of a parts bin compartment
part_h = 56;
status_height = 18;
thumb_style = 'rgb(128,128,128)';
// w,h are the dimensions of the canvas, everyone else is positioned accordingly
Schematic.prototype.set_locations = function(w,h) {
// limit the shrinkage factor
w = Math.max(w,120);
h = Math.max(h,120);
this.width = w;
this.height = h;
this.bg_image.width = w;
this.bg_image.height = h;
this.min_x = 0;
this.min_y = 0;
this.max_x = w/this.scale;
this.max_y = h/this.scale;
// configure canvas
this.canvas.style.left = background_margin + 'px';
this.canvas.style.top = background_margin + 'px';
this.canvas.width = w;
this.canvas.height = h;
this.redraw_background(); // redraw diagram
// configure status bar
this.status_div.style.left = background_margin + 'px';
this.status_div.style.top = this.canvas.offsetTop + this.canvas.offsetHeight + 3 + 'px';
this.status_div.style.width = (w - 4) + 'px'; // subtract interior padding
this.status_div.style.height = status_height + 'px';
// configure parts bin
var total_w = this.canvas.offsetLeft + this.canvas.offsetWidth;
var parts_left = total_w + 3;
var parts_top = background_margin;
var parts_h_limit = this.canvas.offsetTop + this.canvas.offsetHeight;
for (var i = 0; i < this.parts_bin.length; i++) {
var part = this.parts_bin[i];
part.set_location(parts_left,parts_top);
total_w = part.right();
parts_top = part.bottom()-1;
if (parts_top + part_h > parts_h_limit) {
parts_left = total_w - 1;
parts_top = background_margin;
}
}
// configure background
var total_h = this.status_div.offsetTop + this.status_div.offsetHeight + background_margin;
total_w += background_margin;
this.background.height = total_h;
this.background.width = total_w;
/* enable when there's support for resizing schematic
// redraw thumb
var c = this.background.getContext('2d');
c.clearRect(0,0,w,h);
c.strokeStyle = thumb_style;
c.lineWidth = 1;
c.beginPath();
w = total_w - 1;
h = total_h - 1;
c.moveTo(w,h-4); c.lineTo(w-4,h);
c.moveTo(w,h-8); c.lineTo(w-8,h);
c.moveTo(w,h-12); c.lineTo(w-12,h);
c.stroke();
*/
}
// update the value field of our corresponding input field with JSON
// representation of schematic
Schematic.prototype.update_value = function() {
// to do: fill in this.input.value
}
Schematic.prototype.add_component = function(new_c) {
this.components.push(new_c);
// create undoable edit record here
}
Schematic.prototype.remove_component = function(c) {
var index = this.components.indexOf(c);
if (index != -1) this.components.splice(index,1);
}
// add connection point to list of connection points at that location
Schematic.prototype.add_connection_point = function(cp) {
cplist = this.connection_points[cp.location]
if (cplist) cplist.push(cp);
else {
cplist = [cp];
this.connection_points[cp.location] = cplist;
}
// return list of conincident connection points
return cplist;
}
// remove connection point from the list points at the old location
Schematic.prototype.remove_connection_point = function(cp,old_location) {
// remove cp from list at old location
var cplist = this.connection_points[old_location];
if (cplist) {
var index = cplist.indexOf(cp);
if (index != -1) {
cplist.splice(index,1);
// if no more connections at this location, remove
// entry from array to keep our search time short
if (cplist.length == 0)
delete this.connection_points[old_location];
}
}
}
// connection point has changed location: remove, then add
Schematic.prototype.update_connection_point = function(cp,old_location) {
this.remove_connection_point(cp,old_location);
return this.add_connection_point(cp);
}
// add a wire to the schematic
Schematic.prototype.add_wire = function(x1,y1,x2,y2) {
var new_wire = new Wire(this,x1,y1,x2,y2);
this.add_component(new_wire);
new_wire.move_end();
return new_wire;
}
// see if connection points of component c split any wires
Schematic.prototype.check_wires = function(c) {
for (var i = this.components.length - 1; i >=0; --i) {
var cc = this.components[i];
if (cc != c) { // don't check a component against itself
// only wires will do return non-null from a bisect call
var cp = cc.bisect(c);
if (cp) {
// cc is a wire bisected by connection point cp
// remove biscted wire
cc.delete();
// add two new wires with cp in the middle
this.add_wire(cc.x,cc.y,cp.x,cp.y);
this.add_wire(cc.x+cc.dx,cc.y+cc.dy,cp.x,cp.y);
this.redraw_background();
break;
}
}
}
}
///////////////////////////////////////////////////////////////////////////////
//
// Drawing support -- deals with scaling and scrolling of diagrama
//
////////////////////////////////////////////////////////////////////////////////
// here to redraw background image containing static portions of the schematic.
// Also redraws dynamic portion.
Schematic.prototype.redraw_background = function() {
var c = this.bg_image.getContext('2d');
var w = this.bg_image.width;
var h = this.bg_imageheight;
// paint background color
c.fillStyle = element_style;
c.fillRect(0,0,this.width,this.height);
// border
//c.strokeStyle = "rgb(0,0,0)";
//c.strokeRect(0,0,this.width,this.height);
// grid
c.strokeStyle = "rgb(128,128,128)";
var first_x = this.min_x;
var last_x = this.max_x;
var first_y = this.min_y;
var last_y = this.max_y;
for (var i = first_x; i < last_x; i += this.grid)
this.draw_line(c,i,first_y,i,last_y,0.1);
for (var i = first_y; i < last_y; i += this.grid)
this.draw_line(c,first_x,i,last_x,i,0.1);
// unselected components
for (var i = this.components.length - 1; i >= 0; --i) {
var component = this.components[i];
if (!component.selected) component.draw(c);
}
this.redraw(); // background changed, redraw on screen
}
// redraw what user sees = static image + dynamic parts
Schematic.prototype.redraw = function() {
var c = this.canvas.getContext('2d');
// put static image in the background
c.drawImage(this.bg_image, 0, 0);
// selected components
for (var i = this.components.length - 1; i >= 0; --i) {
var component = this.components[i];
if (component.selected) component.draw(c);
}
// connection points: draw one at each location
for (var location in this.connection_points) {
var cplist = this.connection_points[location];
cplist[0].draw(c,cplist.length);
}
// draw new wire
if (this.wire) {
var r = this.wire;
c.strokeStyle = selected_style;
this.draw_line(c,r[0],r[1],r[2],r[3],1);
}
// draw selection rectangle
if (this.select_rect) {
var r = this.select_rect;
c.lineWidth = 1;
c.strokeStyle = selected_style;
c.beginPath();
c.moveTo(r[0],r[1]);
c.lineTo(r[0],r[3]);
c.lineTo(r[2],r[3]);
c.lineTo(r[2],r[1]);
c.lineTo(r[0],r[1]);
c.stroke();
}
// finally overlay cursor
if (this.drawCursor && this.draw_cursor) {
//var x = this.cursor_x;
//var y = this.cursor_y;
//this.draw_text(c,'('+x+','+y+')',x+this.grid,y-this.grid,10);
this.draw_cursor(c,this.cursor_x,this.cursor_y);
}
}
// draws a cross cursor
Schematic.prototype.cross_cursor = function(c,x,y) {
this.draw_line(c,x-this.grid,y,x+this.grid,y,1);
this.draw_line(c,x,y-this.grid,x,y+this.grid,1);
}
Schematic.prototype.draw_line = function(c,x1,y1,x2,y2,width) {
c.lineWidth = width*this.scale;
c.beginPath();
c.moveTo((x1 - this.origin_x) * this.scale,(y1 - this.origin_y) * this.scale);
c.lineTo((x2 - this.origin_x) * this.scale,(y2 - this.origin_y) * this.scale);
c.stroke();
}
Schematic.prototype.draw_arc = function(c,x,y,radius,start_radians,end_radians,anticlockwise,width,filled) {
c.lineWidth = width*this.scale;
c.beginPath();
c.arc((x - this.origin_x)*this.scale,(y - this.origin_y)*this.scale,radius*this.scale,
start_radians,end_radians,anticlockwise);
if (filled) c.fill();
else c.stroke();
}
Schematic.prototype.draw_text = function(c,text,x,y,size) {
c.font = size*this.scale+'pt sans-serif'
c.fillText(text,(x - this.origin_x) * this.scale,(y - this.origin_y) * this.scale);
}
// add method to canvas to compute relative coords for event
HTMLCanvasElement.prototype.relMouseCoords = function(event){
// run up the DOM tree to figure out coords for top,left of canvas
var totalOffsetX = 0;
var totalOffsetY = 0;
var canvasY = 0;
var currentElement = this;
do {
totalOffsetX += currentElement.offsetLeft;
totalOffsetY += currentElement.offsetTop;
}
while(currentElement = currentElement.offsetParent);
// now compute relative position of click within the canvas
this.mouse_x = event.pageX - totalOffsetX;
this.mouse_y = event.pageY - totalOffsetY;
}
///////////////////////////////////////////////////////////////////////////////
//
// Event handling
//
////////////////////////////////////////////////////////////////////////////////
// process special keys here since they don't get delivered correctly on keypress
Schematic.prototype.key_down = function(event) {
if (!event) event = window.event;
var sch = (window.event) ? event.srcElement.schematic : event.target.schematic;
var code = event.keyCode;
if (code == 8 || code == 46) {
// delete selected components
for (var i = sch.components.length - 1; i >= 0; --i) {
var component = sch.components[i];
if (component.selected) component.delete(1);
}
sch.redraw();
event.preventDefault();
return false;
}
return true;
}
// process normal characters
Schematic.prototype.key_press = function(event) {
if (!event) event = window.event;
var sch = (window.event) ? event.srcElement.schematic : event.target.schematic;
var code = window.event ? event.keyCode : event.charCode;
var char = String.fromCharCode(code);
if (char == 'r' || char == 'R') {
// rotate
for (var i = sch.components.length - 1; i >= 0; --i) {
var component = sch.components[i];
if (component.selected) component.rotate(1);
}
sch.redraw();
event.preventDefault();
return false;
}
return true;
}
Schematic.prototype.mouse_enter = function(event) {
if (!event) event = window.event;
var sch = (window.event) ? event.srcElement.schematic : event.target.schematic;
// see if user has selected a new part
if (sch.new_part) {
// grab incoming part, turn off selection of parts bin
var part = sch.new_part;
sch.new_part = null;
part.select(false);
// make a clone of the component in the parts bin
part = part.component.clone(sch,sch.cursor_x,sch.cursor_y);
// unselect everything else in the schematic, add part and select it
sch.unselect_all(-1);
sch.redraw_background(); // so we see any components that got unselected
sch.add_component(part);
part.set_select(true);
// and start dragging it
sch.drag_begin();
}
sch.drawCursor = true;
sch.redraw();
sch.canvas.focus(); // capture key strokes
}
Schematic.prototype.mouse_leave = function(event) {
if (!event) event = window.event;
var sch = (window.event) ? event.srcElement.schematic : event.target.schematic;
sch.drawCursor = false;
sch.redraw();
}
Schematic.prototype.unselect_all = function(which) {
for (var i = this.components.length - 1; i >= 0; --i)
if (i != which) this.components[i].set_select(false);
}
Schematic.prototype.mouse_down = function(event) {
if (!event) event = window.event;
else event.preventDefault();
var sch = (window.event) ? event.srcElement.schematic : event.target.schematic;
// determine where event happened in schematic coordinates
sch.canvas.relMouseCoords(event);
var x = sch.canvas.mouse_x/sch.scale + sch.origin_x;
var y = sch.canvas.mouse_y/sch.scale + sch.origin_y;
sch.cursor_x = Math.round(x/sch.grid) * sch.grid;
sch.cursor_y = Math.round(y/sch.grid) * sch.grid;
// is mouse over a connection point? If so, start dragging a wire
var cplist = sch.connection_points[sch.cursor_x + ',' + sch.cursor_y];
if (cplist && !event.shiftKey) {
sch.unselect_all(-1);
sch.wire = [sch.cursor_x,sch.cursor_y,sch.cursor_x,sch.cursor_y];
} else {
// give all components a shot at processing the selection event
var which = -1;
for (var i = sch.components.length - 1; i >= 0; --i)
if (sch.components[i].select(x,y,event.shiftKey)) {
if (sch.components[i].selected) {
sch.drag_begin();
which = i; // keep track of component we found
}
break;
}
// did we just click on a previously selected component?
var reselect = which!=-1 && sch.components[which].was_previously_selected;
if (!event.shiftKey) {
// if shift key isn't pressed and we didn't click on component
// that was already selected, unselect everyone except component
// we just clicked on
if (!reselect) sch.unselect_all(which);
// if there's nothing to drag, set up a selection rectangle
if (!sch.dragging) sch.select_rect = [sch.canvas.mouse_x,sch.canvas.mouse_y,
sch.canvas.mouse_x,sch.canvas.mouse_y];
}
}
sch.redraw_background();
}
Schematic.prototype.mouse_up = function(event) {
if (!event) event = window.event;
else event.preventDefault();
var sch = (window.event) ? event.srcElement.schematic : event.target.schematic;
// drawing a new wire
if (sch.wire) {
var r = sch.wire;
sch.wire = null;
if (r[0]!=r[2] || r[1]!=r[3]) {
// insert wire component
sch.add_wire(r[0],r[1],r[2],r[3]);
sch.redraw_background();
} else sch.redraw();
}
// dragging
if (sch.dragging) sch.drag_end();
// selection rectangle
if (sch.select_rect) {
var r = sch.select_rect;
// if select_rect is a point, we've already dealt with selection
// in mouse_down handler
if (r[0]!=r[2] || r[1]!=r[3]) {
// convert to schematic coordinates
var s = [r[0]/sch.scale + sch.origin_x, r[1]/sch.scale + sch.origin_y,
r[2]/sch.scale + sch.origin_x, r[3]/sch.scale + sch.origin_y];
canonicalize(s);
if (!event.shiftKey) sch.unselect_all();
// select components that intersect selection rectangle
for (var i = sch.components.length - 1; i >= 0; --i)
sch.components[i].select_rect(s,event.shiftKey);
}
sch.select_rect = null;
sch.redraw_background();
}
}
Schematic.prototype.double_click = function(event) {
if (!event) event = window.event;
else event.preventDefault();
var sch = (window.event) ? event.srcElement.schematic : event.target.schematic;
// determine where event happened in schematic coordinates
sch.canvas.relMouseCoords(event);
var x = sch.canvas.mouse_x/sch.scale + sch.origin_x;
var y = sch.canvas.mouse_y/sch.scale + sch.origin_y;
sch.cursor_x = Math.round(x/sch.grid) * sch.grid;
sch.cursor_y = Math.round(y/sch.grid) * sch.grid;
// see if we double-clicked a component. If so, edit it's properties
for (var i = sch.components.length - 1; i >= 0; --i)
if (sch.components[i].edit_properties(x,y)) break;
}
Schematic.prototype.drag_begin = function() {
// let components know they're about to move
for (var i = this.components.length - 1; i >= 0; --i) {
var component = this.components[i];
if (component.selected) component.move_begin();
}
// remember where drag started
this.drag_x = this.cursor_x;
this.drag_y = this.cursor_y;
this.dragging = true;
}
Schematic.prototype.drag_end = function() {
// let components know they're done moving
for (var i = this.components.length - 1; i >= 0; --i) {
var component = this.components[i];
if (component.selected) component.move_end();
}
this.dragging = false;
}
Schematic.prototype.mouse_move = function(event) {
if (!event) event = window.event;
var sch = (window.event) ? event.srcElement.schematic : event.target.schematic;
sch.canvas.relMouseCoords(event);
var x = sch.canvas.mouse_x/sch.scale + sch.origin_x;
var y = sch.canvas.mouse_y/sch.scale + sch.origin_y;
sch.cursor_x = Math.round(x/sch.grid) * sch.grid;
sch.cursor_y = Math.round(y/sch.grid) * sch.grid;
if (sch.wire) {
// update new wire end point
sch.wire[2] = sch.cursor_x;
sch.wire[3] = sch.cursor_y;
} else if (sch.dragging) {
// see how far we moved
var dx = sch.cursor_x - sch.drag_x;
var dy = sch.cursor_y - sch.drag_y;
if (dx != 0 || dy != 0) {
// update position for next time
sch.drag_x = sch.cursor_x;
sch.drag_y = sch.cursor_y;
// give all components a shot at processing the event
for (var i = sch.components.length - 1; i >= 0; --i) {
var component = sch.components[i];
if (component.selected) component.move(dx,dy);
}
}
} else if (sch.select_rect) {
// update moving corner of selection rectangle
sch.select_rect[2] = sch.canvas.mouse_x;
sch.select_rect[3] = sch.canvas.mouse_y;
//sch.message(sch.select_rect.toString());
}
// just redraw dynamic components
sch.redraw();
}
///////////////////////////////////////////////////////////////////////////////
//
// Status message and dialogs
//
////////////////////////////////////////////////////////////////////////////////
Schematic.prototype.message = function(message) {
this.status.nodeValue = message;
this.recompute_height();
}
Schematic.prototype.append_message = function(message) {
this.status.nodeValue += ' / '+message;
this.recompute_height();
}
// set up a dialog with specified title, content and two buttons at
// the bottom: OK and Cancel. If Cancel is clicked, dialog goes away
// and we're done. If OK is clicked, dialog goes away and the
// callback function is called with the content as an argument (so
// that the values of any fields can be captured).
Schematic.prototype.dialog = function(title,content,callback) {
// create the div for the top level of the dialog, add to DOM
var dialog = document.createElement('div');
dialog.sch = this;
dialog.content = content;
// div to hold the title
var head = document.createElement('div');
head.style.backgroundColor = 'black';
head.style.color = 'white';
head.style.textAlign = 'center';
head.style.padding = '5px';
head.appendChild(document.createTextNode(title));
dialog.appendChild(head);
// div to hold the content
var body = document.createElement('div');
body.appendChild(content);
body.style.padding = '5px';
dialog.appendChild(body);
// OK button
var ok_button = document.createElement('span');
ok_button.appendChild(document.createTextNode('OK'));
ok_button.dialog = dialog; // for the handler to use
ok_button.addEventListener('click',dialog_okay,false);
ok_button.style.border = '1px solid';
ok_button.style.padding = '5px';
ok_button.style.margin = '10px';
// cancel button
var cancel_button = document.createElement('span');
cancel_button.appendChild(document.createTextNode('Cancel'));
cancel_button.dialog = dialog; // for the handler to use
cancel_button.addEventListener('click',dialog_cancel,false);
cancel_button.style.border = '1px solid';
cancel_button.style.padding = '5px';
cancel_button.style.margin = '10px';
// div to hold the two buttons
var buttons = document.createElement('div');
buttons.appendChild(ok_button);
buttons.appendChild(cancel_button);
buttons.style.padding = '5px';
buttons.style.margin = '10px';
dialog.appendChild(buttons);
// add to DOM
dialog.style.background = 'white';
dialog.style.zindex = '1000';
dialog.style.position = 'absolute';
dialog.style.left = this.canvas.mouse_x+'px';
dialog.style.top = this.canvas.mouse_y+'px';
dialog.style.border = '2px solid';
dialog.callback = callback;
this.div.appendChild(dialog);
}
// callback when user click "Cancel" in a dialog
function dialog_cancel(event) {
if (!event) event = window.event;
var dialog = (window.event) ? event.srcElement.dialog : event.target.dialog;
// remove the dialog from the top-level div of the schematic
dialog.parentNode.removeChild(dialog);
}
// callback when user click "OK" in a dialog
function dialog_okay(event) {
if (!event) event = window.event;
var dialog = (window.event) ? event.srcElement.dialog : event.target.dialog;
// remove the dialog from the top-level div of the schematic
dialog.parentNode.removeChild(dialog);
// invoke the callback with the dialog contents as the argument
if (dialog.callback) dialog.callback(dialog.content);
}
///////////////////////////////////////////////////////////////////////////////
//
// Parts bin
//
////////////////////////////////////////////////////////////////////////////////
// one instance will be created for each part in the parts bin
function Part(sch) {
this.sch = sch;
this.component = null;
this.selected = false;
// set up canvas
this.canvas = document.createElement('canvas');
this.canvas.style.borderStyle = 'solid';
this.canvas.style.borderWidth = '1px';
this.canvas.style.position = 'absolute';
this.canvas.height = part_w;
this.canvas.width = part_h;
this.canvas.part = this;
this.canvas.addEventListener('mousedown',this.mouse_down,false);
this.canvas.addEventListener('mouseup',this.mouse_up,false);
// make the part "clickable" by registering a dummy click handler
// this should make things work on the iPad
this.canvas.addEventListener('click',function(){},false);
}
Part.prototype.set_location = function(left,top) {
this.canvas.style.left = left + 'px';
this.canvas.style.top = top + 'px';
}
Part.prototype.right = function() {
return this.canvas.offsetLeft + this.canvas.offsetWidth;
}
Part.prototype.bottom = function() {
return this.canvas.offsetTop + this.canvas.offsetHeight;
}
Part.prototype.set_component = function(component) {
this.component = component;
// figure out scaling and centering of parts icon
var b = component.bounding_box;
var dx = b[2] - b[0];
var dy = b[3] - b[1];
this.scale = 1; //Math.min(part_w/(1.2*dx),part_h/(1.2*dy));
this.origin_x = this.scale*(b[0] + dx/2.0) - part_w/2.0;
this.origin_y = this.scale*(b[1] + dy/2.0) - part_h/2.0;
this.redraw();
}
Part.prototype.redraw = function(part) {
var c = this.canvas.getContext('2d');
// paint background color
c.fillStyle = this.selected ? selected_style : element_style;
c.fillRect(0,0,part_w,part_h);
if (this.component) this.component.draw(c);
}
Part.prototype.select = function(which) {
this.selected = which;
this.redraw();
}
Part.prototype.update_connection_point = function(cp,old_location) {
// no connection points in the parts bin
}
Part.prototype.draw_line = function(c,x1,y1,x2,y2,width) {
c.lineWidth = width*this.scale;
c.beginPath();
c.moveTo((x1 - this.origin_x) * this.scale,(y1 - this.origin_y) * this.scale);
c.lineTo((x2 - this.origin_x) * this.scale,(y2 - this.origin_y) * this.scale);
c.stroke();
}
Part.prototype.draw_arc = function(c,x,y,radius,start_radians,end_radians,anticlockwise,width,filled) {
c.lineWidth = width*this.scale;
c.beginPath();
c.arc((x - this.origin_x)*this.scale,(y - this.origin_y)*this.scale,radius*this.scale,
start_radians,end_radians,anticlockwise);
if (filled) c.fill();
else c.stroke();
}
Part.prototype.draw_text = function(c,text,x,y,size) {
// no text displayed for the parts icon
}
Part.prototype.mouse_down = function(event) {
if (!event) event = window.event;
var part = (window.event) ? event.srcElement.part : event.target.part;
part.select(true);
part.sch.new_part = part;
}
Part.prototype.mouse_up = function(event) {
if (!event) event = window.event;
var part = (window.event) ? event.srcElement.part : event.target.part;
part.select(false);
part.sch.new_part = null;
}
////////////////////////////////////////////////////////////////////////////////
//
// Rectangle helper functions
//
////////////////////////////////////////////////////////////////////////////////
// rect is an array of the form [left,top,right,bottom]
// ensure left < right, top < bottom
function canonicalize(r) {
var temp;
// canonicalize bounding box
if (r[0] > r[2]) {
temp = r[0];
r[0] = r[2];
r[2] = temp;
}
if (r[1] > r[3]) {
temp = r[1];
r[1] = r[3];
r[3] = temp;
}
}
function between(x,x1,x2) {
return x1 <= x && x <= x2;
}
function inside(rect,x,y) {
return between(x,rect[0],rect[2]) && between(y,rect[1],rect[3]);
}
// only works for manhattan rectangles
function intersect(r1,r2) {
// look for non-intersection, negate result
var result = !(r2[0] > r1[2] ||
r2[2] < r1[0] ||
r2[1] > r1[3] ||
r2[3] < r1[1]);
// if I try to return the above expression, javascript returns undefined!!!
return result;
}
////////////////////////////////////////////////////////////////////////////////
//
// Component base class
//
////////////////////////////////////////////////////////////////////////////////
property_size = 5; // point size for Component property text
normal_style = 'rgb(0,0,0)'; // color for unselected components
selected_style = 'rgb(64,255,64)'; // highlight color for selected components
function Component(sch,x,y,rotation) {
this.sch = sch;
this.x = x;
this.y = y;
this.rotation = rotation;
this.selected = false;
this.properties = new Array();
this.bounding_box = [0,0,0,0]; // in device coords [left,top,right,bottom]
this.bbox = this.bounding_box; // in absolute coords
this.connections = [];
}
Component.prototype.add_connection = function(offset_x,offset_y) {
this.connections.push(new ConnectionPoint(this,offset_x,offset_y));
}
Component.prototype.update_coords = function() {
var x = this.x;
var y = this.y;
// update bbox
var b = this.bounding_box;
this.bbox[0] = this.transform_x(b[0],b[1]) + x;
this.bbox[1] = this.transform_y(b[0],b[1]) + y;
this.bbox[2] = this.transform_x(b[2],b[3]) + x;
this.bbox[3] = this.transform_y(b[2],b[3]) + y;
canonicalize(this.bbox);
// update connections
for (var i = this.connections.length - 1; i >= 0; --i)
this.connections[i].update_location();
}
Component.prototype.rotate = function(amount) {
var old_rotation = this.rotation;
this.rotation = (this.rotation + amount) % 8;
this.update_coords();
// create an undoable edit record here
// using old_rotation
}
Component.prototype.move_begin = function() {
// remember where we started this move
this.move_x = this.x;
this.move_y = this.y;
}
Component.prototype.move = function(dx,dy) {
// update coordinates
this.x += dx;
this.y += dy;
this.update_coords();
}
Component.prototype.move_end = function() {
var dx = this.x - this.move_x;
var dy = this.y - this.move_y;
if (dx != 0 || dy != 0) {
// create an undoable edit record here
this.sch.check_wires(this);
}
}
Component.prototype.delete = function() {
// remove connection points from schematic
for (var i = this.connections.length - 1; i >= 0; --i) {
var cp = this.connections[i];
this.sch.remove_connection_point(cp,cp.location);
}
// remove component from schematic
this.sch.remove_component(this);
// create an undoable edit record here
}
Component.prototype.transform_x = function(x,y) {
var rot = this.rotation;
if (rot == 0 || rot == 6) return x;
else if (rot == 1 || rot == 5) return -y;
else if (rot == 2 || rot == 4) return -x;
else return y;
}
Component.prototype.transform_y = function(x,y) {
var rot = this.rotation;
if (rot == 1 || rot == 7) return x;
else if (rot == 2 || rot == 6) return -y;
else if (rot == 3 || rot == 5) return -x;
else return y;
}
Component.prototype.draw_line = function(c,x1,y1,x2,y2) {
c.strokeStyle = this.selected ? selected_style : normal_style;
var nx1 = this.transform_x(x1,y1) + this.x;
var ny1 = this.transform_y(x1,y1) + this.y;
var nx2 = this.transform_x(x2,y2) + this.x;
var ny2 = this.transform_y(x2,y2) + this.y;
this.sch.draw_line(c,nx1,ny1,nx2,ny2,1);
}
Component.prototype.draw_circle = function(c,x,y,radius,filled) {
if (filled) c.fillStyle = this.selected ? selected_style : normal_style;
else c.strokeStyle = this.selected ? selected_style : normal_style;
var nx = this.transform_x(x,y) + this.x;
var ny = this.transform_y(x,y) + this.y;
this.sch.draw_arc(c,nx,ny,radius,0,2*Math.PI,false,1,filled);
}
rot_angle = [
0.0, // NORTH (identity)
Math.PI/2, // EAST (rot270)
Math.PI, // SOUTH (rot180)
3*Math.PI/2, // WEST (rot90)
0.0, // RNORTH (negy)
Math.PI/2, // REAST (int-neg)
Math.PI, // RSOUTH (negx)
3*Math.PI/2, // RWEST (int-pos)
];
Component.prototype.draw_arc = function(c,x,y,radius,start_radians,end_radians) {
c.strokeStyle = this.selected ? selected_style : normal_style;
var nx = this.transform_x(x,y) + this.x;
var ny = this.transform_y(x,y) + this.y;
this.sch.draw_arc(c,nx,ny,radius,
start_radians+rot_angle[this.rotation],end_radians+rot_angle[this.rotation],
false,1,false);
}
Component.prototype.draw = function(c) {
}
// result of rotating an alignment [rot*9 + align]
aOrient = [
0, 1, 2, 3, 4, 5, 6, 7, 8, // NORTH (identity)
2, 5, 8, 1, 4, 7, 0, 3, 6, // EAST (rot270)
8, 7, 6, 5, 4, 3, 2, 1, 0, // SOUTH (rot180)
6, 3, 0, 7, 4, 1, 8, 5, 3, // WEST (rot90)
2, 1, 0, 5, 4, 3, 8, 7, 6, // RNORTH (negy)
8, 5, 2, 7, 4, 1, 6, 3, 0, // REAST (int-neg)
6, 7, 8, 3, 4, 5, 0, 1, 2, // RSOUTH (negx)
0, 3, 6, 1, 4, 7, 2, 5, 8 // RWEST (int-pos)
];
textAlign = [
'left', 'center', 'right',
'left', 'center', 'right',
'left', 'center', 'right'
];
textBaseline = [
'top', 'top', 'top',
'middle', 'middle', 'middle',
'bottom', 'bottom', 'bottom'
];
Component.prototype.draw_text = function(c,text,x,y,alignment,size) {
var a = aOrient[this.rotation*9 + alignment];
c.textAlign = textAlign[a];
c.textBaseline = textBaseline[a];
c.fillStyle = this.selected ? selected_style : normal_style;
this.sch.draw_text(c,text,
this.transform_x(x,y) + this.x,
this.transform_y(x,y) + this.y,
size);
}
Component.prototype.set_select = function(which) {
if (which != this.selected) {
this.selected = which;
// create an undoable edit record here
}
}
Component.prototype.select = function(x,y,shiftKey) {
this.was_previously_selected = this.selected;
if (inside(this.bbox,x,y)) {
this.set_select(shiftKey ? !this.selected : true);
return true;
} else return false;
}
Component.prototype.select_rect = function(s) {
this.was_previously_selected = this.selected;
if (intersect(this.bbox,s))
this.set_select(true);
}
// if connection point of component c bisects the
// wire represented by this compononent, return that
// connection point. Otherwise return null.
Component.prototype.bisect = function(c) {
return null;
}
Component.prototype.edit_properties = function(x,y) {
if (inside(this.bbox,x,y)) {
var content = document.createElement('table');
content.style.marginBotton = '5px';
content.fields = [];
// add an <input> field for each property
for (var i in this.properties) {
var label = document.createTextNode(i + ': ');
var field = document.createElement('input');
field.type = 'text';
field.value = this.properties[i];
field.size = 10;
content.fields.push([i,field]);
var col1 = document.createElement('td');
col1.appendChild(label);
var col2 = document.createElement('td');
col2.appendChild(field);
var row = document.createElement('tr');
row.appendChild(col1);
row.appendChild(col2);
row.style.verticalAlign = 'center';
content.appendChild(row);
}
var component = this; // capture in closure below
this.sch.dialog('Edit Properties',content,function(content) {
var fields = content.fields;
for (var i = fields.length - 1; i >= 0; i--)
component.properties[fields[i][0]] = fields[i][1].value;
component.sch.redraw(); // component is selected, so this will redraw it
});
return true;
} else return false;
}
////////////////////////////////////////////////////////////////////////////////
//
// Connection point
//
////////////////////////////////////////////////////////////////////////////////
connection_point_radius = 2;
function ConnectionPoint(parent,x,y) {
this.parent = parent;
this.offset_x = x;
this.offset_y = y;
this.location = '';
this.update_location();
}
ConnectionPoint.prototype.toString = function() {
return '<ConnectionPoint ('+this.offset_x+','+this.offset_y+') '+this.parent.toString()+'>';
}
ConnectionPoint.prototype.update_location = function() {
// update location string which we use as a key to find coincident connection points
var old_location = this.location;
var parent = this.parent;
var nx = parent.transform_x(this.offset_x,this.offset_y) + parent.x;
var ny = parent.transform_y(this.offset_x,this.offset_y) + parent.y;
this.x = nx;
this.y = ny;
this.location = nx + ',' + ny;
// add ourselves to the connection list for the new location
parent.sch.update_connection_point(this,old_location);
}
ConnectionPoint.prototype.coincident = function(x,y) {
return this.x==x && this.y==y;
}
ConnectionPoint.prototype.draw = function(c,n) {
if (n != 2)
this.parent.draw_circle(c,this.offset_x,this.offset_y,connection_point_radius,n > 2);
}
////////////////////////////////////////////////////////////////////////////////
//
// Wire
//
////////////////////////////////////////////////////////////////////////////////
near_distance = 2; // how close to wire counts as "near by"
function Wire(sch,x1,y1,x2,y2) {
// arbitrarily call x1,y1 the origin
Component.call(this,sch,x1,y1,0);
this.dx = x2 - x1;
this.dy = y2 - y1;
this.add_connection(0,0);
this.add_connection(this.dx,this.dy);
// compute bounding box (expanded slightly)
var r = [0,0,this.dx,this.dy];
canonicalize(r);
r[0] -= near_distance;
r[1] -= near_distance;
r[2] += near_distance;
r[3] += near_distance;
this.bounding_box = r;
this.update_coords(); // update bbox
// used in selection calculations
this.len = Math.sqrt(this.dx*this.dx + this.dy*this.dy);
}
Wire.prototype = new Component();
Wire.prototype.constructor = Wire;
Wire.prototype.toString = function() {
return '<Wire ('+this.x+','+this.y+') ('+(this.x+this.dx)+','+(this.y+this.dy)+')>';
}
Wire.prototype.draw = function(c) {
this.draw_line(c,0,0,this.dx,this.dy);
}
Wire.prototype.clone = function(sch,x,y) {
return new Wire(sch,x,y,x+this.dx,y+this.dy);
}
Wire.prototype.near = function(x,y) {
// crude check: (x,y) within expanded bounding box of wire
if (inside(this.bbox,x,y)) {
// compute distance between x,y and nearst point on line
// http://www.allegro.cc/forums/thread/589720
var D = Math.abs((x - this.x)*this.dy - (y - this.y)*this.dx)/this.len;
if (D <= near_distance) return true;
}
return false;
}
Wire.prototype.select = function(x,y,shiftKey) {
this.was_previously_selected = this.selected;
if (this.near(x,y)) {
this.set_select(shiftKey ? !this.selected : true);
return true;
} else return false;
}
// selection rectangle selects wire only if it includes
// one of the end points
Wire.prototype.select_rect = function(s) {
this.was_previously_selected = this.selected;
if (inside(s,this.x,this.y) || inside(s,this.x+this.dx,this.y+this.dy))
this.set_select(true);
}
// if connection point of component c bisects the
// wire represented by this compononent, return that
// connection point. Otherwise return null.
Wire.prototype.bisect = function(c) {
for (var i = c.connections.length - 1; i >= 0; --i) {
var cp = c.connections[i];
var x = cp.x;
var y = cp.y;
// crude check: (x,y) within expanded bounding box of wire
if (inside(this.bbox,x,y)) {
// compute distance between x,y and nearst point on line
// http://www.allegro.cc/forums/thread/589720
var D = Math.abs((x - this.x)*this.dy - (y - this.y)*this.dx)/this.len;
// final check: ensure point isn't an end point of the wire
if (D < 1 && !this.connections[0].coincident(x,y) && !this.connections[1].coincident(x,y))
return cp;
}
}
return null;
}
Wire.prototype.move_end = function() {
this.sch.check_wires(this);
}
////////////////////////////////////////////////////////////////////////////////
//
// Ground
//
////////////////////////////////////////////////////////////////////////////////
function Ground(sch,x,y,rotation) {
Component.call(this,sch,x,y,rotation);
this.add_connection(0,0);
this.bounding_box = [-6,0,6,8];
this.update_coords();
}
Ground.prototype = new Component();
Ground.prototype.constructor = Ground;
Ground.prototype.toString = function() {
return '<Ground ('+this.x+','+this.y+')>';
}
Ground.prototype.draw = function(c) {
this.draw_line(c,0,0,0,8);
this.draw_line(c,-6,8,6,8);
}
Ground.prototype.clone = function(sch,x,y) {
return new Ground(sch,x,y,this.rotation);
}
////////////////////////////////////////////////////////////////////////////////
//
// Resistor
//
////////////////////////////////////////////////////////////////////////////////
function Resistor(sch,x,y,rotation,name,r) {
Component.call(this,sch,x,y,rotation);
this.properties['name'] = name;
this.properties['r'] = r ? r : '1';
this.add_connection(0,0);
this.add_connection(0,48);
this.bounding_box = [-4,0,4,48];
this.update_coords();
}
Resistor.prototype = new Component();
Resistor.prototype.constructor = Resistor;
Resistor.prototype.toString = function() {
return '<Resistor '+this.properties['r']+' ('+this.x+','+this.y+')>';
}
Resistor.prototype.draw = function(c) {
this.draw_line(c,0,0,0,12);
this.draw_line(c,0,12,4,14);
this.draw_line(c,4,14,-4,18);
this.draw_line(c,-4,18,4,22);
this.draw_line(c,4,22,-4,26);
this.draw_line(c,-4,26,4,30);
this.draw_line(c,4,30,-4,34);
this.draw_line(c,-4,34,0,36);
this.draw_line(c,0,36,0,48);
if (this.properties['r'])
this.draw_text(c,this.properties['r']+'\u03A9',5,24,3,property_size);
if (this.properties['name'])
this.draw_text(c,this.properties['name'],-5,24,5,property_size);
}
Resistor.prototype.clone = function(sch,x,y) {
return new Resistor(sch,x,y,this.rotation,'',this.properties['r']);
}
////////////////////////////////////////////////////////////////////////////////
//
// Capacitor
//
////////////////////////////////////////////////////////////////////////////////
function Capacitor(sch,x,y,rotation,name,c) {
Component.call(this,sch,x,y,rotation);
this.properties['name'] = name;
this.properties['c'] = c ? c : '1p';
this.add_connection(0,0);
this.add_connection(0,48);
this.bounding_box = [-8,0,8,48];
this.update_coords();
}
Capacitor.prototype = new Component();
Capacitor.prototype.constructor = Capacitor;
Capacitor.prototype.toString = function() {
return '<Capacitor '+this.properties['r']+' ('+this.x+','+this.y+')>';
}
Capacitor.prototype.draw = function(c) {
this.draw_line(c,0,0,0,22);
this.draw_line(c,-8,22,8,22);
this.draw_line(c,-8,26,8,26);
this.draw_line(c,0,26,0,48);
if (this.properties['c'])
this.draw_text(c,this.properties['c']+'F',9,24,3,property_size);
if (this.properties['name'])
this.draw_text(c,this.properties['name'],-9,24,5,property_size);
}
Capacitor.prototype.clone = function(sch,x,y) {
return new Capacitor(sch,x,y,this.rotation,'',this.properties['c']);
}
////////////////////////////////////////////////////////////////////////////////
//
// Inductor
//
////////////////////////////////////////////////////////////////////////////////
function Inductor(sch,x,y,rotation,name,l) {
Component.call(this,sch,x,y,rotation);
this.properties['name'] = name;
this.properties['l'] = l ? l : '1n';
this.add_connection(0,0);
this.add_connection(0,48);
this.bounding_box = [-4,0,5,48];
this.update_coords();
}
Inductor.prototype = new Component();
Inductor.prototype.constructor = Inductor;
Inductor.prototype.toString = function() {
return '<Inductor '+this.properties['l']+' ('+this.x+','+this.y+')>';
}
Inductor.prototype.draw = function(c) {
this.draw_line(c,0,0,0,14);
this.draw_arc(c,0,18,4,6*Math.PI/4,3*Math.PI/4);
this.draw_arc(c,0,24,4,5*Math.PI/4,3*Math.PI/4);
this.draw_arc(c,0,30,4,5*Math.PI/4,2*Math.PI/4);
this.draw_line(c,0,34,0,48);
if (this.properties['l'])
this.draw_text(c,this.properties['l']+'H',6,24,3,property_size);
if (this.properties['name'])
this.draw_text(c,this.properties['name'],-3,24,5,property_size);
}
Inductor.prototype.clone = function(sch,x,y) {
return new Inductor(sch,x,y,this.rotation,'',this.properties['l']);
}
////////////////////////////////////////////////////////////////////////////////
//
// Source
//
////////////////////////////////////////////////////////////////////////////////
function Source(sch,x,y,rotation,name,type,value) {
Component.call(this,sch,x,y,rotation);
this.type = type;
this.properties['name'] = name;
this.properties['value'] = value ? value : '1';
this.add_connection(0,0);
this.add_connection(0,48);
this.bounding_box = [-12,0,12,48];
this.update_coords();
}
Source.prototype = new Component();
Source.prototype.constructor = Source;
Source.prototype.toString = function() {
return '<'+this.type+'source '+this.properties['params']+' ('+this.x+','+this.y+')>';
}
Source.prototype.draw = function(c) {
this.draw_line(c,0,0,0,12);
this.draw_circle(c,0,24,12,false);
this.draw_line(c,0,36,0,48);
if (this.type == 'v') { // voltage source
// draw + and -
this.draw_line(c,8,5,8,11);
this.draw_line(c,5,8,11,8);
this.draw_line(c,5,40,11,40);
// draw V
this.draw_line(c,-3,20,0,28);
this.draw_line(c,3,20,0,28);
} else if (this.type == 'i') { // current source
// draw arrow: pos to neg
this.draw_line(c,0,16,0,32);
this.draw_line(c,-3,24,0,32);
this.draw_line(c,3,24,0,32);
}
if (this.properties['name'])
this.draw_text(c,this.properties['name'],-13,24,5,property_size);
if (this.properties['value'])
this.draw_text(c,this.properties['value']+(this.type=='v'?'V':'A'),13,24,3,property_size);
}
Source.prototype.clone = function(sch,x,y) {
return new Source(sch,x,y,this.rotation,'',this.type,this.properties['value']);
}
function VSource(sch,x,y,rotation,name,value) {
Source.call(this,sch,x,y,rotation,name,'v',value);
}
VSource.prototype = new Component();
VSource.prototype.constructor = VSource;
VSource.prototype.toString = Source.prototype.toString;
VSource.prototype.draw = Source.prototype.draw;
VSource.prototype.clone = Source.prototype.clone;
function ISource(sch,x,y,rotation,name,value) {
Source.call(this,sch,x,y,rotation,name,'i',value);
}
ISource.prototype = new Component();
ISource.prototype.constructor = ISource;
ISource.prototype.toString = Source.prototype.toString;
ISource.prototype.draw = Source.prototype.draw;
ISource.prototype.clone = Source.prototype.clone;
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