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New schematic.js from cjt

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This commit is contained in:
Piotr Mitros
2012-01-06 08:12:25 -05:00
parent 213d10619f
commit 9d01c286eb
1 changed files with 645 additions and 155 deletions
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800
js/schematic.js
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@@ -13,7 +13,8 @@
// 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)
// parts -- comma-separated list of parts for parts bin (see parts_map),
// parts="" disables editing of diagram
// JSON schematic representation:
// sch := [part, part, ...]
@@ -70,7 +71,7 @@ schematic = (function() {
annotation_style = 'rgb(255,64,64)'; // color for diagram annotations
property_size = 5; // point size for Component property text
annotation_size = 8; // point size for diagram annotations
annotation_size = 7; // point size for diagram annotations
// list of all the defined parts
parts_map = {
@@ -84,6 +85,7 @@ schematic = (function() {
'd': [Diode, 'Diode'],
'n': [NFet, 'NFet'],
'p': [PFet, 'PFet'],
's': [Probe, 'Scope Probe'],
};
// fix cursor bug in Chrome (default behavior: change to text cursor
@@ -105,70 +107,105 @@ schematic = (function() {
this.grid = 8;
this.scale = 2;
this.origin_x = 0;
this.origin_y = 0;
this.origin_x = input.getAttribute("origin_x");
if (this.origin_x == undefined) this.origin_x = 0;
this.origin_y = input.getAttribute("origin_y");
if (this.origin_y == undefined) this.origin_y = 0;
this.clipboard = undefined;
// start with a background element with normal positioning
this.background = document.createElement('canvas');
this.background.style.backgroundColor = background_style;
this.background.style.borderStyle = 'solid';
this.background.style.borderWidth = '2px';
// use user-supplied list of parts if supplied
// else just populate parts bin with all the parts
this.edits_allowed = true;
var parts = input.getAttribute('parts');
if (parts == undefined) {
parts = new Array();
for (var p in parts_map) parts.push(p);
} else if (parts == '') {
this.edits_allowed = false;
parts = [];
} else parts = parts.split(',');
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('');
this.status_div.appendChild(this.status);
// use user-supplied list of analyses, otherwise provide them all
// analyses="" means no analyses
var analyses = input.getAttribute('analyses');
if (analyses == undefined) analyses = ['dc','ac','tran'];
else if (analyses == '') analyses = [];
else analyses = analyses.split(',');
if (parts.length == 0 && analyses.length == 0) this.diagram_only = true;
else this.diagram_only = false;
if (!this.diagram_only) {
// start with a background element with normal positioning
this.background = document.createElement('canvas');
this.background.style.backgroundColor = background_style;
this.background.style.borderStyle = 'solid';
this.background.style.borderWidth = '2px';
this.status_div = document.createElement('div');
this.status_div.style.position = 'absolute';
this.status_div.style.padding = '2px';
this.status = document.createTextNode('');
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.borderColor = grid_style;
this.canvas.style.position = 'absolute';
this.canvas.style.outline = 'none';
if (!this.diagram_only) {
this.canvas.tabIndex = 1; // so we get keystrokes
this.canvas.style.borderStyle = 'solid';
this.canvas.style.borderWidth = '1px';
this.canvas.style.borderColor = grid_style;
this.canvas.style.position = 'absolute';
this.canvas.style.outline = 'none';
}
this.canvas.schematic = this;
this.canvas.addEventListener('mousemove',schematic_mouse_move,false);
this.canvas.addEventListener('mouseover',schematic_mouse_enter,false);
this.canvas.addEventListener('mouseout',schematic_mouse_leave,false);
this.canvas.addEventListener('mousedown',schematic_mouse_down,false);
this.canvas.addEventListener('mouseup',schematic_mouse_up,false);
this.canvas.addEventListener('dblclick',schematic_double_click,false);
this.canvas.addEventListener('keydown',schematic_key_down,false);
this.canvas.addEventListener('keyup',schematic_key_up,false);
if (this.edits_allowed) {
this.canvas.addEventListener('mousemove',schematic_mouse_move,false);
this.canvas.addEventListener('mouseover',schematic_mouse_enter,false);
this.canvas.addEventListener('mouseout',schematic_mouse_leave,false);
this.canvas.addEventListener('mousedown',schematic_mouse_down,false);
this.canvas.addEventListener('mouseup',schematic_mouse_up,false);
this.canvas.addEventListener('dblclick',schematic_double_click,false);
this.canvas.addEventListener('keydown',schematic_key_down,false);
this.canvas.addEventListener('keyup',schematic_key_up,false);
}
// toolbar
this.tools = new Array();
this.toolbar = [];
this.tools['cut'] = this.add_tool(cut_icon,'Cut: move selected components from diagram to the clipboard',this.cut);
this.tools['copy'] = this.add_tool(copy_icon,'Copy: copy selected components into the clipboard',this.copy);
this.tools['paste'] = this.add_tool(paste_icon,'Paste: copy clipboard into the diagram',this.paste);
if (this.edits_allowed) {
this.tools['cut'] = this.add_tool(cut_icon,'Cut: move selected components from diagram to the clipboard',this.cut);
this.tools['copy'] = this.add_tool(copy_icon,'Copy: copy selected components into the clipboard',this.copy);
this.tools['paste'] = this.add_tool(paste_icon,'Paste: copy clipboard into the diagram',this.paste);
this.toolbar.push(null); // spacer
}
// simulation interface if cktsim.js is loaded
if (typeof cktsim != 'undefined') {
this.toolbar.push(null); // spacer
this.tools['dc'] = this.add_tool('DC','DC Analysis',this.dc_analysis);
//this.tools['ac'] = this.add_tool('AC','AC Small-Signal Analysis',this.ac_analysis);
//this.tools['tran'] = this.add_tool('TRAN','Transient Analysis',this.transient_analysis);
if (analyses.indexOf('dc') != -1) {
this.tools['dc'] = this.add_tool('DC','DC Analysis',this.dc_analysis);
this.enable_tool('dc',true);
}
this.enable_tool('dc',true);
//this.enable_tool('ac',true);
//this.enable_tool('tran',true);
if (analyses.indexOf('ac') != -1) {
this.tools['ac'] = this.add_tool('AC','AC Small-Signal Analysis',this.ac_analysis);
this.enable_tool('ac',true);
this.ac_npts = '5'; // default values for AC Analysis
this.ac_fstart = '10';
this.ac_fstop = '10MEG';
}
if (analyses.indexOf('tran') != -1) {
//this.tools['tran'] = this.add_tool('TRAN','Transient Analysis',this.tran_analysis);
//this.enable_tool('tran',true);
}
}
// 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;
@@ -188,15 +225,6 @@ schematic = (function() {
// 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;
@@ -209,15 +237,17 @@ schematic = (function() {
}
// add all elements to the DOM
this.div.appendChild(this.background);
for (var i = 0; i < this.toolbar.length; i++) {
var tool = this.toolbar[i];
if (tool != null) this.div.appendChild(tool);
if (!this.diagram_only) {
this.div.appendChild(this.background);
for (var i = 0; i < this.toolbar.length; i++) {
var tool = this.toolbar[i];
if (tool != null) this.div.appendChild(tool);
}
this.div.appendChild(this.status_div);
for (var i = 0; i < this.parts_bin.length; i++)
this.div.appendChild(this.parts_bin[i].canvas);
}
this.div.appendChild(this.canvas);
this.div.appendChild(this.status_div);
for (var i = 0; i < this.parts_bin.length; i++)
this.div.appendChild(this.parts_bin[i].canvas);
input.parentNode.insertBefore(this.div,input.nextSibling);
// make sure other code can find us!
@@ -243,21 +273,28 @@ schematic = (function() {
// 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;
if (this.diagram_only) {
this.canvas.width = w;
this.canvas.height = h;
this.redraw_background(); // redraw diagram
return;
}
this.min_x = 0;
this.min_y = 0;
this.max_x = w/this.scale;
this.max_y = h/this.scale;
var left = 2*background_margin; // space to the left
var left,top;
// start with tool bar
var top = background_margin;
left = 2*background_margin; // space to the left
top = background_margin;
var max_height = 0;
if (this.toolbar.length > 0) {
tool_left = left;
@@ -296,7 +333,7 @@ schematic = (function() {
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() + 2;
if (parts_top + part_h > parts_h_limit) {
@@ -604,11 +641,7 @@ schematic = (function() {
//
////////////////////////////////////////////////////////////////////////////////
Schematic.prototype.dc_analysis = function() {
// remove any previous annotations
this.operating_point = undefined;
this.redraw();
Schematic.prototype.extract_circuit = function() {
// give all the circuit nodes a name, extract netlist
this.label_connection_points();
var netlist = this.json();
@@ -616,6 +649,16 @@ schematic = (function() {
// create a circuit from the netlist
var ckt = new cktsim.Circuit();
ckt.load_netlist(netlist);
return ckt;
}
Schematic.prototype.dc_analysis = function() {
// remove any previous annotations
this.unselect_all(-1);
this.redraw_background();
var ckt = this.extract_circuit();
// run the analysis
this.operating_point = ckt.dc();
@@ -624,7 +667,88 @@ schematic = (function() {
this.redraw();
}
// return a list of [color,node_label] for each probe in the diagram
Schematic.prototype.find_probes = function() {
var result = [];
for (var i = this.components.length - 1; i >= 0; --i) {
var c = this.components[i];
if (c.type == 's') result.push(c.probe_info());
}
return result;
}
Schematic.prototype.ac_analysis = function() {
this.unselect_all(-1);
this.redraw_background();
var npts_lbl = 'Number of points/decade';
var fstart_lbl = 'Starting frequency (Hz)';
var fstop_lbl = 'Ending frequency (Hz)';
if (this.find_probes().length == 0) {
this.message("AC Analysis: there are no scope probes in the diagram!");
return;
}
var fields = new Array();
fields[npts_lbl] = build_input('text',10,this.ac_npts);
fields[fstart_lbl] = build_input('text',10,this.ac_fstart);
fields[fstop_lbl] = build_input('text',10,this.ac_fstop);
var content = build_table(fields);
content.fields = fields;
content.sch = this;
this.dialog('AC Analysis',content,function(content) {
var sch = content.sch;
var ckt = sch.extract_circuit();
// retrieve parameters, remember for next time
sch.ac_npts = content.fields[npts_lbl].value;
sch.ac_fstart = content.fields[fstart_lbl].value;
sch.ac_fstop = content.fields[fstop_lbl].value;
// run the analysis
var results = ckt.ac(ckt.parse_number(sch.ac_npts),
ckt.parse_number(sch.ac_fstart),
ckt.parse_number(sch.ac_fstop));
if (typeof results == 'string')
sch.message(results);
else {
var x_values = results['frequencies'];
// x axis will be a log scale
for (var i = x_values.length - 1; i >= 0; --i)
x_values[i] = Math.log(x_values[i])/Math.LN10;
// set up plot values for each node with a probe
var y_values = []; // list of [color, result_array]
var probes = sch.find_probes();
for (var i = probes.length - 1; i >= 0; --i) {
var color = probes[i][0];
var label = probes[i][1];
var v = results[label];
// convert values into dB relative to max value
var v_max = -Infinity;
for (var j = v.length - 1; j >= 0; --j) {
v[j] = Math.abs(v[j]);
if (v[j] > v_max) v_max = v[j];
}
for (var j = v.length - 1; j >= 0; --j)
// convert each value to dB relative to max
v[j] = 20.0 * Math.log(v[j]/v_max)/Math.LN10;
y_values.push([color,v]);
}
// graph the result and display in a window
var graph = sch.graph(x_values,y_values,'log(Frequency)','dB');
sch.window('Results of AC Analysis',graph);
}
})
}
Schematic.prototype.transient_analysis = function() {
@@ -643,24 +767,24 @@ schematic = (function() {
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);
c.lineCap = 'round';
// border
//c.strokeStyle = "rgb(0,0,0)";
//c.strokeRect(0,0,this.width,this.height);
if (!this.diagram_only) {
// paint background color
c.fillStyle = element_style;
c.fillRect(0,0,this.width,this.height);
// grid
c.strokeStyle = grid_style;
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);
// grid
c.strokeStyle = grid_style;
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) {
@@ -720,14 +844,18 @@ schematic = (function() {
// display operating point results
if (this.operating_point) {
// make a copy of the operating_point info so we can mess with it
var temp = new Array();
for (var i in this.operating_point) temp[i] = this.operating_point[i];
if (typeof this.operating_point == 'string')
this.message(this.operating_point);
else {
// make a copy of the operating_point info so we can mess with it
var temp = new Array();
for (var i in this.operating_point) temp[i] = this.operating_point[i];
// run through connection points displaying (once) the voltage
// for each electrical node
for (var location in this.connection_points)
(this.connection_points[location])[0].display_voltage(c,temp);
// run through connection points displaying (once) the voltage
// for each electrical node
for (var location in this.connection_points)
(this.connection_points[location])[0].display_voltage(c,temp);
}
}
// finally overlay cursor
@@ -745,6 +873,14 @@ schematic = (function() {
this.draw_line(c,x,y-this.grid,x,y+this.grid,1);
}
Schematic.prototype.moveTo = function(c,x,y) {
c.moveTo((x - this.origin_x) * this.scale,(y - this.origin_y) * this.scale);
}
Schematic.prototype.lineTo = function(c,x,y) {
c.lineTo((x - this.origin_x) * this.scale,(y - this.origin_y) * this.scale);
}
Schematic.prototype.draw_line = function(c,x1,y1,x2,y2,width) {
c.lineWidth = width*this.scale;
c.beginPath();
@@ -1087,6 +1223,7 @@ schematic = (function() {
// div to hold the content
var body = document.createElement('div');
content.style.marginBotton = '5px';
body.appendChild(content);
body.style.padding = '5px';
dialog.appendChild(body);
@@ -1146,6 +1283,50 @@ schematic = (function() {
//
////////////////////////////////////////////////////////////////////////////////
// build a 2-column HTML table from an associative array (keys as text in
// column 1, values in column 2).
function build_table(a) {
var tbl = document.createElement('table');
// build a row for each element in associative array
for (var i in a) {
var label = document.createTextNode(i + ': ');
var col1 = document.createElement('td');
col1.appendChild(label);
var col2 = document.createElement('td');
col2.appendChild(a[i]);
var row = document.createElement('tr');
row.appendChild(col1);
row.appendChild(col2);
row.style.verticalAlign = 'center';
tbl.appendChild(row);
}
return tbl;
}
// build an input field
function build_input(type,size,value) {
var input = document.createElement('input');
input.type = type;
input.size = size;
if (value == undefined) input.value = '';
else input.value = value.toString();
return input;
}
// build a select widget using the strings found in the options array
function build_select(options,selected) {
var select = document.createElement('select');
for (var i = 0; i < options.length; i++) {
var option = document.createElement('option');
option.text = options[i];
select.add(option);
if (options[i] == selected) select.selectedIndex = i;
}
return select;
}
Schematic.prototype.window = function(title,content) {
// create the div for the top level of the window
var win = document.createElement('div');
@@ -1299,13 +1480,16 @@ schematic = (function() {
Schematic.prototype.enable_tool = function(tname,which) {
var tool = this.tools[tname];
tool.style.opacity = which ? 1.0 : 0.2;
tool.enabled = which;
// if disabling tool, remove border and tip
if (!which) {
tool.style.borderColor = background_style;
tool.sch.message('');
if (tool != undefined) {
tool.style.opacity = which ? 1.0 : 0.2;
tool.enabled = which;
// if disabling tool, remove border and tip
if (!which) {
tool.style.borderColor = background_style;
tool.sch.message('');
}
}
}
@@ -1349,6 +1533,239 @@ schematic = (function() {
close_icon = 'data:image/gif;base64,R0lGODlhEAAQAMQAAGtra/f3/62tre/v9+bm787O1pycnHNzc6WlpcXFxd7e3tbW1nt7e7W1te/v74SEhMXFzmNjY+bm5v///87OzgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAAAAAAALAAAAAAQABAAAAVt4DRMZGmSwRQQBUS9MAwRIyQ5Uq7neEFSDtxOF4T8cobIQaE4RAQ5yjHHiCCSD510QtFGvoCFdppDfBu7bYzy+D7WP5ggAgA8Y3FKwi5IAhIweW1vbBGEWy5rilsFi2tGAwSJixAFBCkpJ5ojIQA7';
///////////////////////////////////////////////////////////////////////////////
//
// Graphing
//
///////////////////////////////////////////////////////////////////////////////
// add dashed lines!
// from http://davidowens.wordpress.com/2010/09/07/html-5-canvas-and-dashed-lines/
CanvasRenderingContext2D.prototype.dashedLineTo = function(fromX, fromY, toX, toY, pattern) {
// Our growth rate for our line can be one of the following:
// (+,+), (+,-), (-,+), (-,-)
// Because of this, our algorithm needs to understand if the x-coord and
// y-coord should be getting smaller or larger and properly cap the values
// based on (x,y).
var lt = function (a, b) { return a <= b; };
var gt = function (a, b) { return a >= b; };
var capmin = function (a, b) { return Math.min(a, b); };
var capmax = function (a, b) { return Math.max(a, b); };
var checkX = { thereYet: gt, cap: capmin };
var checkY = { thereYet: gt, cap: capmin };
if (fromY - toY > 0) {
checkY.thereYet = lt;
checkY.cap = capmax;
}
if (fromX - toX > 0) {
checkX.thereYet = lt;
checkX.cap = capmax;
}
this.moveTo(fromX, fromY);
var offsetX = fromX;
var offsetY = fromY;
var idx = 0, dash = true;
while (!(checkX.thereYet(offsetX, toX) && checkY.thereYet(offsetY, toY))) {
var ang = Math.atan2(toY - fromY, toX - fromX);
var len = pattern[idx];
offsetX = checkX.cap(toX, offsetX + (Math.cos(ang) * len));
offsetY = checkY.cap(toY, offsetY + (Math.sin(ang) * len));
if (dash) this.lineTo(offsetX, offsetY);
else this.moveTo(offsetX, offsetY);
idx = (idx + 1) % pattern.length;
dash = !dash;
}
};
// given a range of values, return a new range [vmin',vmax'] where the limits
// have been chosen "nicely". Taken from matplotlib.ticker.LinearLocator
function view_limits(vmin,vmax) {
var log_range = Math.log(vmax - vmin)/Math.LN10;
var exponent = Math.floor(log_range);
//if (log_range - exponent < 0.5) exponent -= 1;
var scale = Math.pow(10,-exponent);
vmin = Math.floor(scale*vmin)/scale;
vmax = Math.ceil(scale*vmax)/scale;
return [vmin,vmax,1.0/scale];
}
// x_values is an array of x coordinates for each of the plots
// y_values is an array of [color, value_array], one entry for each plot
Schematic.prototype.graph = function(x_values,y_values,x_legend,y_legend) {
var pwidth = 400; // dimensions of actual plot
var pheight = 300; // dimensions of actual plot
var left_margin = 55;
var top_margin = 25;
var right_margin = 25;
var bottom_margin = 45;
var tick_length = 5;
var pattern = [1,2];
var w = pwidth + left_margin + right_margin;
var h = pheight + top_margin + bottom_margin;
var canvas = document.createElement('canvas');
canvas.width = w;
canvas.height = h;
// the graph itself will be drawn here and this image will be copied
// onto canvas, where it can be overlayed with mouse cursors, etc.
var bg_image = document.createElement('canvas');
bg_image.width = w;
bg_image.height = h;
canvas.bg_image = bg_image; // so we can find it during event handling
// start by painting an opaque background
var c = bg_image.getContext('2d');
c.fillStyle = background_style;
c.fillRect(0,0,w,h);
c.fillStyle = element_style;
c.fillRect(left_margin,top_margin,pwidth,pheight);
// figure out scaling for plots
var x_min = array_min(x_values);
var x_max = array_max(x_values);
var x_limits = view_limits(x_min,x_max);
x_min = x_limits[0];
x_max = x_limits[1];
var x_scale = pwidth/(x_max - x_min);
function plot_x(x) {
return (x - x_min)*x_scale + left_margin;
}
// draw x grid
c.strokeStyle = grid_style;
c.lineWidth = 1;
c.fillStyle = normal_style;
c.font = '10pt sans-serif';
c.textAlign = 'center';
c.textBaseline = 'top';
var end = top_margin + pheight;
for (var x = x_min; x <= x_max; x += x_limits[2]) {
var temp = plot_x(x) + 0.5; // keep lines crisp!
// grid line
c.beginPath();
if (x == x_min) {
c.moveTo(temp,top_margin);
c.lineTo(temp,end);
} else
c.dashedLineTo(temp,top_margin,temp,end,pattern);
c.stroke();
// tick mark
c.beginPath();
c.moveTo(temp,end);
c.lineTo(temp,end + tick_length);
c.stroke();
c.fillText(x.toString(),temp,end + tick_length);
}
var y_min = Infinity;
var y_max = -Infinity;
var plot;
for (plot = y_values.length - 1; plot >= 0; --plot) {
var values = y_values[plot][1];
var temp = array_min(values);
if (temp < y_min) y_min = temp;
temp = array_max(values);
if (temp > y_max) y_max = temp;
}
var y_limits = view_limits(y_min,y_max);
y_min = y_limits[0];
y_max = y_limits[1];
var y_scale = pheight/(y_max - y_min);
function plot_y(y) {
return (y_max - y)*y_scale + top_margin;
}
// draw y grid
c.textAlign = 'right';
c.textBaseline = 'middle';
for (var y = y_min; y <= y_max; y += y_limits[2]) {
var temp = plot_y(y) + 0.5; // keep lines crisp!
// grid line
c.beginPath();
if (y == y_min) {
c.moveTo(left_margin,temp);
c.lineTo(left_margin + pwidth,temp);
} else
c.dashedLineTo(left_margin,temp,left_margin + pwidth,temp,pattern);
c.stroke();
// tick mark
c.beginPath();
c.moveTo(left_margin - tick_length,temp);
c.lineTo(left_margin,temp);
c.stroke();
c.fillText(y.toString(),left_margin - tick_length -2,temp);
}
// now draw each plot
var x,y;
c.lineWidth = 3;
for (plot = y_values.length - 1; plot >= 0; --plot) {
c.strokeStyle = probe_colors_rgb[y_values[plot][0]];
var values = y_values[plot][1];
c.beginPath();
x = plot_x(x_values[0]);
y = plot_y(values[0]);
c.moveTo(x,y);
for (var i = 1; i < x_values.length; i++) {
x = plot_x(x_values[i]);
y = plot_y(values[i]);
c.lineTo(x,y);
}
c.stroke();
}
// draw legends
c.font = '12pt sans-serif';
c.textAlign = 'center';
c.textBaseline = 'bottom';
c.fillText(x_legend,left_margin + pwidth/2,h - 5);
c.textBaseline = 'top';
c.save();
c.translate(5 ,top_margin + pheight/2);
c.rotate(-Math.PI/2);
c.fillText(y_legend,0,0);
c.restore();
// return our masterpiece
redraw_plot(canvas);
return canvas;
}
function array_max(a) {
max = -Infinity;
for (var i = a.length - 1; i >= 0; --i)
if (a[i] > max) max = a[i];
return max;
}
function array_min(a) {
min = Infinity;
for (var i = a.length - 1; i >= 0; --i)
if (a[i] < min) min = a[i];
return min;
}
function redraw_plot(canvas) {
var c = canvas.getContext('2d');
c.drawImage(canvas.bg_image,0,0);
}
///////////////////////////////////////////////////////////////////////////////
//
// Parts bin
@@ -1430,6 +1847,14 @@ schematic = (function() {
// no connection points in the parts bin
}
Part.prototype.moveTo = function(c,x,y) {
c.moveTo((x - this.origin_x) * this.scale,(y - this.origin_y) * this.scale);
}
Part.prototype.lineTo = function(c,x,y) {
c.lineTo((x - this.origin_x) * this.scale,(y - this.origin_y) * this.scale);
}
Part.prototype.draw_line = function(c,x1,y1,x2,y2,width) {
c.lineWidth = width*this.scale;
c.beginPath();
@@ -1552,8 +1977,9 @@ schematic = (function() {
//
////////////////////////////////////////////////////////////////////////////////
function Component(x,y,rotation) {
function Component(type,x,y,rotation) {
this.sch = undefined;
this.type = type;
this.x = x;
this.y = y;
this.rotation = rotation;
@@ -1666,6 +2092,18 @@ schematic = (function() {
else return y;
}
Component.prototype.moveTo = function(c,x,y) {
var nx = this.transform_x(x,y) + this.x;
var ny = this.transform_y(x,y) + this.y;
this.sch.moveTo(c,nx,ny);
}
Component.prototype.lineTo = function(c,x,y) {
var nx = this.transform_x(x,y) + this.x;
var ny = this.transform_y(x,y) + this.y;
this.sch.lineTo(c,nx,ny);
}
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;
@@ -1775,39 +2213,19 @@ schematic = (function() {
Component.prototype.edit_properties = function(x,y) {
if (inside(this.bbox,x,y)) {
var content = document.createElement('table');
content.style.marginBotton = '5px';
content.fields = [];
// make an <input> widget for each property
var fields = new Array();
for (var i in this.properties)
fields[i] = build_input('text',10,this.properties[i]);
// 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';
var pvalue = this.properties[i];
field.value = pvalue ? pvalue : '';
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
var content = build_table(fields);
content.fields = fields;
content.component = this;
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_background();
for (var i in content.fields)
content.component.properties[i] = content.fields[i].value;
content.component.sch.redraw_background();
});
return true;
} else return false;
@@ -1912,8 +2330,10 @@ schematic = (function() {
var label = v.toFixed(2) + 'V';
// first draw some solid blocks in the background
this.parent.draw_text(c,'\u2588\u2588\u2588\u2588',this.offset_x,this.offset_y,
4,annotation_size,background_style);
c.globalAlpha = 0.85;
this.parent.draw_text(c,'\u2588\u2588\u2588',this.offset_x,this.offset_y,
4,annotation_size,element_style);
c.globalAlpha = 1.0;
// display the node voltage at this connection point
this.parent.draw_text(c,label,this.offset_x,this.offset_y,
@@ -1934,7 +2354,7 @@ schematic = (function() {
function Wire(x1,y1,x2,y2) {
// arbitrarily call x1,y1 the origin
Component.call(this,x1,y1,0);
Component.call(this,'w',x1,y1,0);
this.dx = x2 - x1;
this.dy = y2 - y1;
this.add_connection(0,0);
@@ -2045,11 +2465,10 @@ schematic = (function() {
////////////////////////////////////////////////////////////////////////////////
function Ground(x,y,rotation) {
Component.call(this,x,y,rotation);
Component.call(this,'g',x,y,rotation);
this.add_connection(0,0);
this.bounding_box = [-6,0,6,8];
this.update_coords();
this.type = 'g';
}
Ground.prototype = new Component();
Ground.prototype.constructor = Ground;
@@ -2073,6 +2492,83 @@ schematic = (function() {
this.connections[0].propagate_label('0'); // canonical label for GND node
}
////////////////////////////////////////////////////////////////////////////////
//
// Scope Probe
//
////////////////////////////////////////////////////////////////////////////////
probe_colors = ['red','green','blue','cyan','magenta','black'];
probe_colors_rgb = {
'red': 'rgb(255,64,64)',
'green': 'rgb(64,255,64)',
'blue': 'rgb(64,64,255)',
'cyan': 'rgb(64,255,255)',
'magenta' : 'rgb(255,64,255)',
'black': 'rgb(0,0,0)',
};
function Probe(x,y,rotation,color) {
Component.call(this,'s',x,y,rotation);
this.add_connection(0,0);
this.properties['color'] = color ? color : 'cyan';
this.bounding_box = [0,0,27,-21];
this.update_coords();
}
Probe.prototype = new Component();
Probe.prototype.constructor = Probe;
Probe.prototype.toString = function() {
return '<Probe ('+this.x+','+this.y+')>';
}
Probe.prototype.draw = function(c) {
// draw outline
this.draw_line(c,0,0,4,-4);
this.draw_line(c,2,-6,6,-2);
this.draw_line(c,2,-6,17,-21);
this.draw_line(c,6,-2,21,-17);
this.draw_line(c,17,-21,21,-17);
this.draw_arc(c,19,-11,8,3*Math.PI/2,0);
// fill body with plot color
c.fillStyle = probe_colors_rgb[this.properties['color']];
c.beginPath();
this.moveTo(c,2,-6)
this.lineTo(c,6,-2);
this.lineTo(c,21,-17);
this.lineTo(c,17,-21);
this.lineTo(c,2,-6);
c.fill();
}
Probe.prototype.clone = function(x,y) {
return new Probe(x,y,this.rotation,this.properties['color']);
}
Probe.prototype.edit_properties = function(x,y) {
if (inside(this.bbox,x,y)) {
var fields = new Array();
fields['Plot color'] = build_select(probe_colors,this.properties['color']);
var content = build_table(fields);
content.fields = fields;
content.component = this;
this.sch.dialog('Edit Properties',content,function(content) {
var color_choice = content.fields['Plot color'];
content.component.properties['color'] = probe_colors[color_choice.selectedIndex];
content.component.sch.redraw_background();
});
return true;
} else return false;
}
// return [color, node_label] for this probe
Probe.prototype.probe_info = function() {
return [this.properties['color'],this.connections[0].label];
}
////////////////////////////////////////////////////////////////////////////////
//
// Resistor
@@ -2080,14 +2576,13 @@ schematic = (function() {
////////////////////////////////////////////////////////////////////////////////
function Resistor(x,y,rotation,name,r) {
Component.call(this,x,y,rotation);
Component.call(this,'r',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();
this.type = 'r';
}
Resistor.prototype = new Component();
Resistor.prototype.constructor = Resistor;
@@ -2123,14 +2618,13 @@ schematic = (function() {
////////////////////////////////////////////////////////////////////////////////
function Capacitor(x,y,rotation,name,c) {
Component.call(this,x,y,rotation);
Component.call(this,'c',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();
this.type = 'c';
}
Capacitor.prototype = new Component();
Capacitor.prototype.constructor = Capacitor;
@@ -2161,14 +2655,13 @@ schematic = (function() {
////////////////////////////////////////////////////////////////////////////////
function Inductor(x,y,rotation,name,l) {
Component.call(this,x,y,rotation);
Component.call(this,'l',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();
this.type = 'l';
}
Inductor.prototype = new Component();
Inductor.prototype.constructor = Inductor;
@@ -2201,13 +2694,12 @@ schematic = (function() {
////////////////////////////////////////////////////////////////////////////////
function Diode(x,y,rotation,name) {
Component.call(this,x,y,rotation);
Component.call(this,'d',x,y,rotation);
this.properties['name'] = name;
this.add_connection(0,0); // anode
this.add_connection(0,48); // cathode
this.bounding_box = [-8,0,8,48];
this.update_coords();
this.type = 'd';
}
Diode.prototype = new Component();
Diode.prototype.constructor = Diode;
@@ -2239,7 +2731,7 @@ schematic = (function() {
////////////////////////////////////////////////////////////////////////////////
function NFet(x,y,rotation,name,sw,sl) {
Component.call(this,x,y,rotation);
Component.call(this,'n',x,y,rotation);
this.properties['name'] = name;
this.properties['scaled width'] = sw ? sw : '2';
this.properties['scaled length'] = sl ? sl : '1';
@@ -2248,7 +2740,6 @@ schematic = (function() {
this.add_connection(-24,24); // gate
this.bounding_box = [-24,0,8,48];
this.update_coords();
this.type = 'n';
}
NFet.prototype = new Component();
NFet.prototype.constructor = NFet;
@@ -2287,7 +2778,7 @@ schematic = (function() {
////////////////////////////////////////////////////////////////////////////////
function PFet(x,y,rotation,name,sw,sl) {
Component.call(this,x,y,rotation);
Component.call(this,'p',x,y,rotation);
this.properties['name'] = name;
this.properties['scaled width'] = sw ? sw : '2';
this.properties['scaled length'] = sl ? sl : '1';
@@ -2296,7 +2787,6 @@ schematic = (function() {
this.add_connection(-24,24); // gate
this.bounding_box = [-24,0,8,48];
this.update_coords();
this.type = 'p';
}
PFet.prototype = new Component();
PFet.prototype.constructor = PFet;
@@ -2337,14 +2827,13 @@ schematic = (function() {
////////////////////////////////////////////////////////////////////////////////
function OpAmp(x,y,rotation,name,sw,sl) {
Component.call(this,x,y,rotation);
Component.call(this,'o',x,y,rotation);
this.properties['name'] = name;
this.add_connection(0,0); // +
this.add_connection(0,16); // -
this.add_connection(48,8); // output
this.bounding_box = [0,-8,48,24];
this.update_coords();
this.type = 'o';
}
OpAmp.prototype = new Component();
OpAmp.prototype.constructor = OpAmp;
@@ -2382,8 +2871,7 @@ schematic = (function() {
////////////////////////////////////////////////////////////////////////////////
function Source(x,y,rotation,name,type,value) {
Component.call(this,x,y,rotation);
this.type = type;
Component.call(this,type,x,y,rotation);
this.properties['name'] = name;
this.properties['value'] = value ? value : '1';
this.add_connection(0,0);
@@ -2404,10 +2892,12 @@ schematic = (function() {
this.draw_line(c,0,36,0,48);
if (this.type == 'v') { // voltage source
this.draw_text(c,'+',0,12,1,property_size);
this.draw_text(c,'\u2013',0,36,7,property_size); // minus sign
// 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);
//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);