fix a bug that all keys are ignored

app.py

@@ -129,7 +129,7 @@ Points to note for pseudo-3D rotation: When performing pseudo-3D rotation on the
 - "alt + drag" to **move**
 - "shift + drag" to **rotate** (move right first, release shift, then up or down)
 - "space + drag" to **range-move**
-- "[", "]" or mouse wheel to shrink or expand **range**
+- "[", "]" or mouse "Alt + wheel" to shrink or expand **range**
 - "ctrl + z", "shift + ctrl + z" to **undo**, **redo**
 - "ctrl + E" **add** new person
 - "Q + click" to **delete** person

static/poseEditor.js

@@ -513,6 +513,7 @@ function ModifyDragRange(delta) { dragRange = Math.max(dragRangeDelta, Math.min(
 
 document.addEventListener('wheel', function(event) {
   if (!isMouseOnCanvas(event)) {return;}
+  if (!event.altKey) {return;}
 
   event.preventDefault();
   const deltaY = event.deltaY;
@@ -524,8 +525,6 @@ document.addEventListener('wheel', function(event) {
 }, {passive: false});
 
 document.addEventListener("keydown", (event) => { 
-  if (!isMouseOnCanvas(event)) {return;}
-
   if (event.code == "BracketLeft") { ModifyDragRange(-dragRangeDelta); }
   if (event.code == "BracketRight") { ModifyDragRange(dragRangeDelta); }
   keyDownFlags[event.code] = true; 
@@ -533,8 +532,6 @@ document.addEventListener("keydown", (event) => {
   event.preventDefault();
 });
 document.addEventListener("keyup", (event) => { 
-  if (!isMouseOnCanvas(event)) {return;}
-
   keyDownFlags[event.code] = false; 
   if (event.ctrlKey && event.code == "KeyE") {
     addPerson();