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openwebrx-clone
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The version before was THE working one. Now started to add secondary waterfall zoom.

This commit is contained in:
ha7ilm 2017-05-22 08:37:14 +02:00
parent d0e49725c7
commit f11e701fae
1 changed files with 21 additions and 0 deletions
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21
htdocs/openwebrx.js
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@ -567,6 +567,7 @@ function mkenvelopes(visible_range) //called from mkscale
{
demodulators[i].envelope.draw(visible_range);
}
if(demodulators.length) secondary_demod_waterfall_set_zoom(demodulators[0].low_cut, demodulators[0].high_cut);
}
function demodulator_remove(which)
@ -2472,3 +2473,23 @@ function secondary_demod_canvas_container_mouseup(evt)
if(evt.which==1) secondary_demod_mousedown=false;
secondary_demod_update_channel_freq_from_event(evt);
}
function secondary_demod_waterfall_set_zoom(low_cut, high_cut)
{
if(!secondary_demod || !secondary_demod_canvases_initialized) return;
if(low_cut<0 && high_cut<0)
{
[low_cut, high_cut] = [-high_cut, -low_cut];
}
else if(low_cut<0 && high_cut>0)
{
high_cut=Math.max(Math.abs(high_cut), Math.abs(low_cut));
low_cut=0;
}
var shown_bw = high_cut-low_cut;
var canvas_width = $(secondary_demod_canvas_container).width() * (if_samp_rate/2)/shown_bw;
var canvas_left = -canvas_width*(low_cut/(if_samp_rate/2));
console.log("setzoom", canvas_width, canvas_left, low_cut, high_cut);
secondary_demod_canvases.map((x)=>{$(x).css("left",canvas_left+"px").css("width",canvas_width+"px");});
}