ilia.gurielidze/scada_device_layout
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Add shift+drag to constrain movement to horizontal or vertical axis

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Holding Shift while dragging locks movement to the dominant axis
(whichever has the larger delta from drag start). Works for both
single and multi-selection moves.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
igurielidze 2026-03-21 18:59:51 +04:00
parent b4e3a7d6ff
commit 31ea4c0908
1 changed files with 16 additions and 0 deletions
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16
svelte-app/src/lib/canvas/interactions.ts
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@ -490,6 +490,14 @@ function onMousemove(e: MouseEvent) {
if (!pastDragThreshold(pos.x, pos.y, dragState.startX!, dragState.startY!, DRAG_THRESHOLD)) return;
dragState.dragActivated = true;
}
// Shift: constrain to orthogonal axis (horizontal or vertical)
if (e.shiftKey) {
if (Math.abs(pos.x - dragState.startX!) >= Math.abs(pos.y - dragState.startY!)) {
pos.y = dragState.startY!;
} else {
pos.x = dragState.startX!;
}
}
const sym = layout.symbols.find(s => s.id === dragState!.placedId);
if (!sym) return;
const bb = getAABB(0, 0, sym.w, sym.h, sym.rotation);
@ -508,6 +516,14 @@ function onMousemove(e: MouseEvent) {
if (!pastDragThreshold(pos.x, pos.y, dragState.startX!, dragState.startY!, DRAG_THRESHOLD)) return;
dragState.dragActivated = true;
}
// Shift: constrain to orthogonal axis
if (e.shiftKey) {
if (Math.abs(pos.x - dragState.startX!) >= Math.abs(pos.y - dragState.startY!)) {
pos.y = dragState.startY!;
} else {
pos.x = dragState.startX!;
}
}
for (const { id, offsetX, offsetY } of dragState.multiOffsets) {
const sym = layout.symbols.find(s => s.id === id);
if (!sym) continue;