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Merge pull request #60 from gdevic/dev

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Added zoom using the mouse wheel
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BigEd 2020-03-31 13:08:33 +01:00 committed by GitHub
commit badcf8e40b
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1 changed files with 17 additions and 7 deletions
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expertWires.js
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@ -277,6 +277,15 @@ function handleKey(e){
else if(c=='p') stepBack();
}
// handler for zoom in/out using the mouse wheel
function handleWheelZoom(e){
chipsurround.focus();
e.preventDefault();
var n = e.deltaY / 100;
if(n>0 && zoom>1) setZoom(zoom/1.2);
if(n<0 && zoom<grMaxZoom) setZoom(zoom*1.2);
}
// handler for mousedown events over chip display
// must handle click-to-select (and focus), and drag to pan
function mouseDown(e){
@ -599,6 +608,7 @@ function setupChipLayoutGraphics(){
}
// grant focus to the chip display to enable zoom keys
chipsurround.focus();
chipsurround.onwheel = function(e){handleWheelZoom(e);};
chipsurround.onmousedown = function(e){mouseDown(e);};
chipsurround.onkeypress = function(e){handleKey(e);};
chipsurround.onmouseout = function(e){mouseLeave(e);};