layout move tool

Author: learncold

src/application/LayoutCanvasSnapping.cpp

@@ -367,4 +367,37 @@ LayoutSnapResult snapLayoutDragPoint(
     return result;
 }
 
+LayoutDragSnapResult snapLayoutSelectionDrag(
+    const safecrowd::domain::FacilityLayout2D& staticLayout,
+    const std::string& floorId,
+    const std::vector<safecrowd::domain::Point2D>& anchors,
+    const safecrowd::domain::Point2D& rawDelta,
+    const LayoutCanvasTransform& transform,
+    const LayoutSnapOptions& options) {
+    LayoutDragSnapResult result{.delta = rawDelta};
+    if (anchors.empty()) {
+        return result;
+    }
+
+    double bestDistance = options.tolerancePixels;
+    for (const auto& anchor : anchors) {
+        const auto moved = anchor + rawDelta;
+        const auto snapped = snapLayoutDragPoint(staticLayout, floorId, anchor, moved, transform, options);
+        if (!snapped.snapped) {
+            continue;
+        }
+
+        const auto distance = screenDistance(transform, moved, snapped.point);
+        if (distance <= bestDistance) {
+            bestDistance = distance;
+            result = {
+                .delta = snapped.point - anchor,
+                .snapped = true,
+            };
+        }
+    }
+
+    return result;
+}
+
 }  // namespace safecrowd::application

src/application/LayoutCanvasSnapping.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <string>
+#include <vector>
 
 #include "application/LayoutCanvasRendering.h"
 #include "domain/FacilityLayout2D.h"
@@ -18,6 +19,11 @@ struct LayoutSnapResult {
     bool snapped{false};
 };
 
+struct LayoutDragSnapResult {
+    safecrowd::domain::Point2D delta{};
+    bool snapped{false};
+};
+
 LayoutSnapResult snapLayoutPoint(
     const safecrowd::domain::FacilityLayout2D& layout,
     const std::string& floorId,
@@ -33,4 +39,12 @@ LayoutSnapResult snapLayoutDragPoint(
     const LayoutCanvasTransform& transform,
     const LayoutSnapOptions& options = {});
 
+LayoutDragSnapResult snapLayoutSelectionDrag(
+    const safecrowd::domain::FacilityLayout2D& staticLayout,
+    const std::string& floorId,
+    const std::vector<safecrowd::domain::Point2D>& anchors,
+    const safecrowd::domain::Point2D& rawDelta,
+    const LayoutCanvasTransform& transform,
+    const LayoutSnapOptions& options = {});
+
 }  // namespace safecrowd::application