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combine methods

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This commit is contained in:
Jakob Ketterl 2020-04-30 23:31:52 +02:00
parent 02a6326605
commit 5013af2117
1 changed files with 21 additions and 28 deletions
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49
htdocs/lib/Demodulator.js
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@ -15,29 +15,21 @@ Filter.prototype.getLimits = function() {
};
};
function Envelope(parent) {
this.parent = parent;
function Envelope(demodulator) {
this.demodulator = demodulator;
this.dragged_range = Demodulator.draggable_ranges.none;
}
Envelope.prototype.draw = function(visible_range){
this.visible_range = visible_range;
this.drag_ranges = this.envelope_draw(
range,
center_freq + this.parent.offset_frequency + this.parent.low_cut,
center_freq + this.parent.offset_frequency + this.parent.high_cut,
this.color, center_freq + this.parent.offset_frequency
);
};
var line = center_freq + this.demodulator.offset_frequency;
Envelope.prototype.envelope_draw = function (range, from, to, color, line) {
// ____
// Draws a standard filter envelope like this: _/ \_
// Parameters are given in offset frequency (Hz).
// Envelope is drawn on the scale canvas.
// A "drag range" object is returned, containing information about the draggable areas of the envelope
// (beginning, ending and the line showing the offset frequency).
if (typeof color === "undefined") color = "#ffff00"; //yellow
var env_bounding_line_w = 5; //
var env_att_w = 5; // _______ ___env_h2 in px ___|_____
var env_h1 = 17; // _/| \_ ___env_h1 in px _/ |_ \_
@ -45,7 +37,9 @@ Envelope.prototype.envelope_draw = function (range, from, to, color, line) {
var env_lineplus = 1; // ||env_bounding_line_w
var env_line_click_area = 6;
//range=get_visible_freq_range();
var from = center_freq + this.demodulator.offset_frequency + this.demodulator.low_cut;
var from_px = scale_px_from_freq(from, range);
var to = center_freq + this.demodulator.offset_frequency + this.demodulator.high_cut;
var to_px = scale_px_from_freq(to, range);
if (to_px < from_px) /* swap'em */ {
var temp_px = to_px;
@ -53,12 +47,11 @@ Envelope.prototype.envelope_draw = function (range, from, to, color, line) {
from_px = temp_px;
}
/*from_px-=env_bounding_line_w/2;
to_px+=env_bounding_line_w/2;*/
from_px -= (env_att_w + env_bounding_line_w);
to_px += (env_att_w + env_bounding_line_w);
// do drawing:
scale_ctx.lineWidth = 3;
var color = this.color || '#ffff00'; // yellow
scale_ctx.strokeStyle = color;
scale_ctx.fillStyle = color;
var drag_ranges = {envelope_on_screen: false, line_on_screen: false};
@ -91,7 +84,7 @@ Envelope.prototype.envelope_draw = function (range, from, to, color, line) {
scale_ctx.stroke();
}
}
return drag_ranges;
this.drag_ranges = drag_ranges;
};
Envelope.prototype.drag_start = function(x, key_modifiers){
@ -99,9 +92,9 @@ Envelope.prototype.drag_start = function(x, key_modifiers){
this.dragged_range = this.where_clicked(x, this.drag_ranges, key_modifiers);
this.drag_origin = {
x: x,
low_cut: this.parent.low_cut,
high_cut: this.parent.high_cut,
offset_frequency: this.parent.offset_frequency
low_cut: this.demodulator.low_cut,
high_cut: this.demodulator.high_cut,
offset_frequency: this.demodulator.offset_frequency
};
return this.dragged_range !== Demodulator.draggable_ranges.none;
};
@ -144,33 +137,33 @@ Envelope.prototype.drag_move = function(x) {
//frequency.
if (this.dragged_range === dr.beginning || this.dragged_range === dr.bfo || this.dragged_range === dr.pbs) {
//we don't let low_cut go beyond its limits
if ((new_value = this.drag_origin.low_cut + minus * freq_change) < this.parent.filter.getLimits().low) return true;
if ((new_value = this.drag_origin.low_cut + minus * freq_change) < this.demodulator.filter.getLimits().low) return true;
//nor the filter passband be too small
if (this.parent.high_cut - new_value < this.parent.filter.min_passband) return true;
if (this.demodulator.high_cut - new_value < this.demodulator.filter.min_passband) return true;
//sanity check to prevent GNU Radio "firdes check failed: fa <= fb"
if (new_value >= this.parent.high_cut) return true;
this.parent.low_cut = new_value;
if (new_value >= this.demodulator.high_cut) return true;
this.demodulator.low_cut = new_value;
}
if (this.dragged_range === dr.ending || this.dragged_range === dr.bfo || this.dragged_range === dr.pbs) {
//we don't let high_cut go beyond its limits
if ((new_value = this.drag_origin.high_cut + minus * freq_change) > this.parent.filter.getLimits().high) return true;
if ((new_value = this.drag_origin.high_cut + minus * freq_change) > this.demodulator.filter.getLimits().high) return true;
//nor the filter passband be too small
if (new_value - this.parent.low_cut < this.parent.filter.min_passband) return true;
if (new_value - this.demodulator.low_cut < this.demodulator.filter.min_passband) return true;
//sanity check to prevent GNU Radio "firdes check failed: fa <= fb"
if (new_value <= this.parent.low_cut) return true;
this.parent.high_cut = new_value;
if (new_value <= this.demodulator.low_cut) return true;
this.demodulator.high_cut = new_value;
}
if (this.dragged_range === dr.anything_else || this.dragged_range === dr.bfo) {
//when any other part of the envelope is dragged, the offset frequency is changed (whole passband also moves with it)
new_value = this.drag_origin.offset_frequency + freq_change;
if (new_value > bandwidth / 2 || new_value < -bandwidth / 2) return true; //we don't allow tuning above Nyquist frequency :-)
this.parent.offset_frequency = new_value;
this.demodulator.offset_frequency = new_value;
}
//now do the actual modifications:
mkenvelopes(this.visible_range);
this.parent.set();
this.demodulator.set();
//will have to change this when changing to multi-demodulator mode:
tunedFrequencyDisplay.setFrequency(center_freq + this.parent.offset_frequency);
tunedFrequencyDisplay.setFrequency(center_freq + this.demodulator.offset_frequency);
return true;
};