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Added zoom using the mouse wheel

This commit is contained in:
Goran Devic 2020-03-12 15:09:55 -05:00
parent 5b86a57c2c
commit 8097137323
1 changed files with 17 additions and 7 deletions
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24
expertWires.js
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@ -37,7 +37,7 @@ var labelThese=[];
// overlay - a red/white transparency to show logic high or low
// hilite - to show the selected polygon
// hitbuffer - abusing color values to return which polygon is under a point
// we no longer use a scaling transform - we now scale the chip data at
// we no longer use a scaling transform - we now scale the chip data at
// the point of drawing line segments
// if the canvas is any smaller than chip coordinates there will be
// rounding artifacts, and at high zoom there will be anti-aliasing on edges.
@ -53,7 +53,7 @@ var layernames = ['metal', 'switched diffusion', 'inputdiode', 'grounded diffusi
var colors = ['rgba(128,128,192,0.4)','#FFFF00','#FF00FF','#4DFF4D',
'#FF4D4D','#801AC0','rgba(128,0,255,0.75)'];
var drawlayers = [true, true, true, true, true, true];
// some modes and parameters which can be passed in from the URL query
var moveHereFirst;
var expertMode=true;
@ -277,13 +277,22 @@ 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){
chipsurround.focus();
e.preventDefault();
moved=false;
dragMouseX = e.clientX;
moved=false;
dragMouseX = e.clientX;
dragMouseY = e.clientY;
chipsurround.onmousemove = function(e){mouseMove(e)};
chipsurround.onmouseup = function(e){mouseUp(e)};
@ -306,7 +315,7 @@ function mouseMove(e){
}
function mouseUp(e){
if(!moved) handleClick(e);
if(!moved) handleClick(e);
chipsurround.onmousemove = undefined;
chipsurround.onmouseup = undefined;
}
@ -350,8 +359,8 @@ function updateLinkHere(){
// boxLabel(['PD', 50, 8424, 3536, 9256, 2464])
// boxLabel(['IR', 50, 8432, 2332, 9124, 984])
// boxLabel(['PLA', 100, 1169, 2328, 8393, 934])
// boxLabel(['Y', 50, 2143, 8820, 2317, 5689])
// boxLabel(['X', 50, 2317, 8820, 2490, 5689])
// boxLabel(['Y', 50, 2143, 8820, 2317, 5689])
// boxLabel(['X', 50, 2317, 8820, 2490, 5689])
// boxLabel(['S', 50, 2490, 8820, 2814, 5689])
// boxLabel(['ALU', 50, 2814, 8820, 4525, 5689])
// boxLabel(['DAdj', 40, 4525, 8820, 5040, 5689])
@ -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);};