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Merge pull request #4 from yoursunny/scroll

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processing: preserve scroll position while zooming
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aster94
2019-01-04 17:04:04 +01:00
committed by GitHub
parent 860204617b 7470cee5f3
commit 6c6402743a
1 changed files with 34 additions and 32 deletions
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processing.pde
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@@ -312,8 +312,10 @@ void mouseWheel(MouseEvent event) {
if (mouseY>buttonY && mouseY <buttonY+buttonH && if (mouseY>buttonY && mouseY <buttonY+buttonH &&
mouseX>button4X && mouseX <button4X+smallButtonW) { mouseX>button4X && mouseX <button4X+smallButtonW) {
//it is over the reducer button //it is over the reducer button
xShift *= reducer;
reducer-= wheel/10; reducer-= wheel/10;
reducer = constrain(reducer, 0.1, 9.9); reducer = constrain(reducer, 0.1, 9.9);
xShift /= reducer; // preserve scroll position
getData(); getData();
} else { //move the graph } else { //move the graph
xShift-=wheel*50; xShift-=wheel*50;