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api,
GraphicObjectRead,
ObjectTypeEnum,
useGraphicsgroupingsDestroyMutation,
useGraphicsgroupingsUngroupCreateMutation,
useGraphicsObjectsPartialUpdateMutation,
useUnitopsSimulationobjectsCreateMutation,
useUnitopsSimulationobjectsDuplicateSimulationObjectCreateMutation,
} from "@/api/apiStore.gen";
import { useHasCommand } from "@/commands/commandHooks";
import {
useConvertStreamToDn,
useSplitStreamWithHistory,
} from "@/hooks/connections";
import {
useDeleteSimulationObject,
useOptimisticallyDeleteSelection,
} from "@/hooks/deleteObjects";
import {
useCurrentGroupId,
useCurrentGroupObjects,
useCurrentObject,
useFlowsheetPorts,
useFlowsheetUnitOps,
useGraphicsObjects,
useGroup,
useGroupObjects,
useObjectsGraphicObjectsMap,
useSimulationObjectGroup,
useStreamType,
useTrackCoordinates,
} from "@/hooks/flowsheetObjects";
import { useProjectId } from "@/hooks/project";
import { useSearchParam } from "@/hooks/searchParams";
import { setCopiedObject } from "@/store/CopySlice";
import { useAppDispatch } from "@/store/hooks";
import { PointerState, setPointerState } from "@/store/PointerSlice";
import { RootState } from "@/store/store";
import { useRunCommand } from "just-search-it";
import { useEffect, useState } from "react";
import { DropTargetMonitor } from "react-dnd";
import { useSelector } from "react-redux";
import { useSearchParams } from "react-router-dom";
import { toast } from "sonner";
import { SwitchGroup } from "../../../../commands/SwitchCurrentGroup";
import { isStream } from "../../../../lib/isStream";
import { useSelectionRect } from "./SelectionRect";
import { useUndoRedoStore } from "@/hooks/useUndoRedoStore";
import { createAddCommand } from "@/utils/commandCreators";
import { ContentTypes } from "../LeftSideBar/LeftSideBarTabDefinitions";
import { useCreateModuleFromTemplate } from "@/hooks/useTemplate";
export const snap = (
x: number,
y: number,
width: number,
height: number
): { snapX: number; snapY: number } => {
// snap to the center of the object
const SNAP_SIZE = 25;
const snapX = Math.round((x + width / 2) / SNAP_SIZE) * SNAP_SIZE - width / 2;
const snapY =
Math.round((y + height / 2) / SNAP_SIZE) * SNAP_SIZE - height / 2;
return {
snapX,
snapY,
};
};
interface DragItem {
unitOpType: ObjectTypeEnum | "template_module";
templateId?: number;
templateName?: string;
}
export interface FlowsheetSurfaceStateDef {
scale: number;
stageX: number;
stageY: number;
}
// Function to create the model
function createModel(x, y, unitOpType, flowsheetId, groupId) {
const { snapX, snapY } = snap(x, y, 0, 0);
return {
x: snapX,
y: snapY,
objectType: unitOpType as ObjectTypeEnum,
flowsheet: flowsheetId,
parentGroup: groupId,
};
}
const canvasToFlowsheetCoords = (x: number, stageX: number, scale: number) => {
// converts the x coordinate from top left of canvas
// to the x coordinate in the flowsheet (accounting for zoom and pan)
// Works for x/stageX and y/stageY
return (x - stageX) / scale;
};
export { canvasToFlowsheetCoords, createModel };
interface FlowsheetCanvasProps {
canvasDiv: React.RefObject<HTMLDivElement>;
pointerState: PointerState;
FlowsheetSurfaceState: FlowsheetSurfaceStateDef;
setFlowsheetSurfaceState: React.Dispatch<
React.SetStateAction<{
scale: number;
stageX: number;
stageY: number;
}>
>;
canvasWidth: number;
canvasHeight: number;
}
export const useFlowsheetCanvasFunctions = (props: FlowsheetCanvasProps) => {
const {
canvasDiv,
pointerState,
FlowsheetSurfaceState,
setFlowsheetSurfaceState,
} = props;
const dispatch = useAppDispatch();
const objectsGraphicObjectsMap = useObjectsGraphicObjectsMap();
const flowsheetId = useProjectId();
const deleteSimulationObject = useDeleteSimulationObject();
const graphicsObjects = useGraphicsObjects();
const currentGroupObjects = useCurrentGroupObjects();
const [createObject] = useUnitopsSimulationobjectsCreateMutation();
const { addHistory } = useUndoRedoStore();
const splitStreamWithHistory = useSplitStreamWithHistory();
const streamType = useStreamType();
const [objectId] = useSearchParam("object");
const [searchParams, setSearchParams] = useSearchParams();
const [deleteGroup] = useGraphicsgroupingsDestroyMutation();
const simulationObjectGroup = useSimulationObjectGroup();
const currentObject = useCurrentObject();
const [updateGraphicObject] = useGraphicsObjectsPartialUpdateMutation();
const convertStreamToDN = useConvertStreamToDn();
const optimisticallyDeleteSelection = useOptimisticallyDeleteSelection();
const currentGroupId = useCurrentGroupId();
const getGroup = useGroup();
const [ungroup] = useGraphicsgroupingsUngroupCreateMutation();
const flowsheetObjects = useFlowsheetUnitOps();
const groupObjects = useGroupObjects();
const [duplicateObject] =
useUnitopsSimulationobjectsDuplicateSimulationObjectCreateMutation();
const copiedObjects = useSelector(
(state: RootState) => state.copiedObject.ids
);
const [loading, setLoading] = useState(true);
const switchGroup = useRunCommand(SwitchGroup);
const hasCommand = useHasCommand();
const ports = useFlowsheetPorts();
useTrackCoordinates(FlowsheetSurfaceState, loading);
const { createModuleFromTemplate } = useCreateModuleFromTemplate();
const currentTab = currentGroupId;
const canSwitchGroup = hasCommand(SwitchGroup, currentTab);
useEffect(() => {
// zoom to fit when the objects are first loaded
if (
loading &&
graphicsObjects !== undefined &&
flowsheetObjects !== undefined &&
currentGroupId !== undefined
) {
switchGroup(currentTab);
setLoading(false);
}
}, [graphicsObjects, flowsheetObjects, currentGroupId, canSwitchGroup]);
const {
selectionRect,
onSelectionRemoved,
onSelectionStart,
onResizeSelectionRect,
onSelectionRectResizeEnd,
setSelectionRect,
makeGroup,
deleteSelectedObjects,
} = useSelectionRect(FlowsheetSurfaceState);
// Change current zoom of the canvas
const changeZoom = (
towardX: number,
towardY: number,
amount: number,
newStageX?: number,
newStageY?: number
) => {
const newScale = Math.min(
1.5,
Math.max(0.25, FlowsheetSurfaceState.scale * amount)
); //Zoom value must be within the range of 25% to 150%
const mousePointTo = {
x:
towardX / FlowsheetSurfaceState.scale -
FlowsheetSurfaceState.stageX / FlowsheetSurfaceState.scale,
y:
towardY / FlowsheetSurfaceState.scale -
FlowsheetSurfaceState.stageY / FlowsheetSurfaceState.scale,
};
setFlowsheetSurfaceState({
scale: newScale,
stageX: newStageX ?? (towardX / newScale - mousePointTo.x) * newScale,
stageY: newStageY ?? (towardY / newScale - mousePointTo.y) * newScale,
});
};
const getDropPosition = (monitor: DropTargetMonitor<DragItem, void>) => {
const clientOffset = monitor.getClientOffset();
const x = canvasToFlowsheetCoords(
(clientOffset?.x || 0) -
(canvasDiv.current?.parentElement?.offsetLeft || 0),
FlowsheetSurfaceState.stageX,
FlowsheetSurfaceState.scale
);
const y = canvasToFlowsheetCoords(
(clientOffset?.y || 0) -
(canvasDiv.current?.parentElement?.offsetTop || 0),
FlowsheetSurfaceState.stageY,
FlowsheetSurfaceState.scale
);
return { x, y };
};
const handleDrop = (
item: DragItem,
monitor: DropTargetMonitor<DragItem, void>
) => {
const { x, y } = getDropPosition(monitor);
if (item.unitOpType === "template_module") {
handleTemplateModuleDrop(item, x, y);
return;
}
//crerate the object with the current group id or use root if no group id is present
const model = createModel(
x,
y,
item.unitOpType,
flowsheetId,
currentGroupId
);
handleObjectCreation(model);
};
const handleTemplateModuleDrop = async (
item: { templateId: number; templateName: string },
x?: number,
y?: number
) => {
try {
const created = await createModuleFromTemplate(
item.templateId,
flowsheetId,
currentGroupId,
x,
y
);
Iif (!created) {
throw new Error("Backend did not return a created module id");
}
toast.success(`${item.templateName} module created successfully!`);
} catch (error) {
toast.error(`Failed to create ${item.templateName} module`);
console.error("Template module creation error:", error);
}
};
const onKeyDown = (e) => {
const zoomBy = 1.25;
// TODO: move all these to the command system?
Iif (e.ctrlKey && e.key === "c") {
e.preventDefault();
handleObjectCopy();
return;
}
Iif (e.ctrlKey && e.key === "v") {
e.preventDefault();
handleControlVPaste();
return;
}
Iif (e.key === "M" || e.key === "m") {
dispatch(setPointerState("move"));
return;
}
Iif (e.ctrlKey && e.key === "=") {
e.preventDefault();
Iif (!canvasDiv.current) return;
changeZoom(
canvasDiv.current.offsetWidth / 2,
canvasDiv.current.offsetHeight / 2,
zoomBy
);
}
Iif (e.ctrlKey && e.key === "-") {
e.preventDefault();
Iif (!canvasDiv.current) return;
changeZoom(
canvasDiv.current.offsetWidth / 2,
canvasDiv.current.offsetHeight / 2,
1 / zoomBy
);
}
Iif (e.key !== "Delete" && e.key !== "Backspace") return;
deleteSelectedObject();
};
const clearObjectSelection = () => {
setSearchParams((prev) => {
const newSearchParams = new URLSearchParams(prev);
newSearchParams.delete("object");
return newSearchParams;
});
};
const deleteSelectedObjectsMultiple = () => {
deleteSelectedObjects();
clearObjectSelection();
// disable the selection rectangle
onSelectionRemoved();
};
const deleteSelectedObject = () => {
Iif (selectionRect.selectVisible) {
deleteSelectedObjectsMultiple();
return;
}
if (currentObject) {
Iif (
isStream(currentObject.objectType) &&
streamType(currentObject.id) == "intermediate"
) {
// deleting an intermediate stream, perform a split
splitStream(currentObject.id);
} else {
if (currentObject.objectType === "group") {
const group = simulationObjectGroup(currentObject.id);
if (group) {
deleteGroup({ id: group.id });
const objectsToDelete = groupObjects(group.id).map((obj) => obj.id);
objectsToDelete.push(currentObject.id);
optimisticallyDeleteSelection(objectsToDelete);
}
} else {
deleteSimulationObject(currentObject);
}
}
clearObjectSelection();
}
};
const getGraphicsObject = (objID: number) => {
return graphicsObjects?.find((obj) => obj.simulationObject.id === objID);
};
/**
* Get the centre/mid-point coordinates of a graphic object.
* @param graphicObject - The graphic object to get the centre coordinates for.
* @returns {x: number, y: number} - The x and y coordinates of the centre point.
*/
const getCentredCoordinates = (
graphicObject: GraphicObjectRead
): { x: number; y: number } => {
const centredCoord = {
x: graphicObject?.x + graphicObject?.width / 2,
y: graphicObject?.y + graphicObject?.height / 2,
};
return centredCoord;
};
/**
* Get the distance between two points. Works better if centre point coordinates are used.
* @param streamPoint - The XY coordinates of the stream object.
* @param unitOpPoint - The XY coordinates of the unit operation it is connected to.
* @returns {x: number, y: number} - The x and y distances between the two points.
*/
const getDistanceBetweenPoints = (
streamPoint: { x: number; y: number },
unitOpPoint: { x: number; y: number }
): { x: number; y: number } => {
const xyDistance = {
x: streamPoint.x - unitOpPoint.x,
y: streamPoint.y - unitOpPoint.y,
};
return xyDistance;
};
/**
* Get the coordinates of the position of an object after a clockwise rotation around a selected object.
* @param selectedObject - The object being rotated around.
* @param objectToMove - The object being moved.
* @param unitCoords - The centre coordinates of the selected object.
* @param distance - The distance between the object and the selected object.
* @returns {x: number, y: number} - The new x and y coordinates of the object after rotation.
*/
const getCoordsClockwiseRotation = (
selectedObject: GraphicObjectRead,
objectToMove: GraphicObjectRead,
unitCoords: { x: number; y: number },
distance: { x: number; y: number }
): { x: number; y: number } => {
let newCoords = { x: objectToMove.x, y: objectToMove.y };
Iif (selectedObject.id !== objectToMove.id) {
// CW rotation - x distance becomes -y, y distance becomes x; offset with object dimensions
newCoords = {
x: unitCoords.x - distance.y - objectToMove.height / 2,
y: unitCoords.y + distance.x - objectToMove.height / 2,
};
}
return newCoords;
};
/**
* Get the coordinates of the position of an object after an anti-clockwise rotation around a selected object.
* @param selectedObject - The object being rotated around.
* @param objectToMove - The object being moved.
* @param unitCoords - The centre coordinates of the selected object.
* @param distance - The distance between the object and the selected object.
* @returns {x: number, y: number} - The new x and y coordinates of the object after rotation.
*/
const getCoordsAntiClockwiseRotation = (
selectedObject: GraphicObjectRead,
objectToMove: GraphicObjectRead,
unitCoords: { x: number; y: number },
distance: { x: number; y: number }
): { x: number; y: number } => {
let newCoords = { x: objectToMove.x, y: objectToMove.y };
Iif (selectedObject.id !== objectToMove.id) {
// ACW rotation - x distance becomes y, y distance becomes -x; offset with object dimensions
newCoords = {
x: unitCoords.x + distance.y - objectToMove.width / 2,
y: unitCoords.y - distance.x - objectToMove.width / 2,
};
}
return newCoords;
};
/**
* Get the coordinates of the position of an object after a horizontal flip.
* @param selectedObject - The object being flipped.
* @param objectToMove - The object being moved.
* @param unitCoords - The centre coordinates of the selected object (the one being flipped).
* @param distance - The distance between the object and the selected object.
* @returns {x: number, y: number} - The new x and y coordinates of the object after the flip.
*/
const getCoordsFlipH = (
selectedObject: GraphicObjectRead,
objectToMove: GraphicObjectRead,
unitCoords: { x: number; y: number },
distance: { x: number; y: number }
): { x: number; y: number } => {
let newCoords = { x: objectToMove.x, y: objectToMove.y };
Iif (selectedObject.id !== objectToMove.id) {
// Flip units horizontally - x distance becomes -x; offset with object dimensions
newCoords = {
x: unitCoords.x - distance.x - objectToMove.width / 2,
y: unitCoords.y + distance.y - objectToMove.height / 2,
};
}
return newCoords;
};
/**
* Get the coordinates of the position of an object after a vertical flip.
* @param selectedObject - The object being flipped.
* @param objectToMove - The object being moved.
* @param unitCoords - The centre coordinates of the selected object (the one being flipped).
* @param distance - The distance between the object and the selected object.
* @returns {x: number, y: number} - The new x and y coordinates of the object after the flip.
*/
const getCoordsFlipV = (
selectedObject: GraphicObjectRead,
objectToMove: GraphicObjectRead,
unitCoords: { x: number; y: number },
distance: { x: number; y: number }
): { x: number; y: number } => {
let newCoords = { x: objectToMove.x, y: objectToMove.y };
Iif (selectedObject.id !== objectToMove.id) {
// Flip units vertically - y distance becomes -y; offset with object dimensions
newCoords = {
x: unitCoords.x + distance.x - objectToMove.width / 2,
y: unitCoords.y - distance.y - objectToMove.height / 2,
};
}
return newCoords;
};
const rotateFlipSelectedObject = (operation: string) => {
const objID = +objectId!;
const selectedGraphicObject = getGraphicsObject(objID);
const groupId = currentGroupId;
if (selectedGraphicObject) {
const currentRotation = Number(selectedGraphicObject?.rotation) || 0;
const currentFlipped = selectedGraphicObject?.flipped;
const connectedStreams = getConnectedStreams(
selectedGraphicObject.simulationObject.id
);
const operationGroup = [
selectedGraphicObject.simulationObject.id,
...connectedStreams,
];
let newRotation = currentRotation;
let newFlipped = currentFlipped;
// Do operation on the selected unit and all connected streams
operationGroup.map((simulationObjectId) => {
// Get centrepoint of the object then calculate its distance from the main unit's centrepoint
const graphicObj = getGraphicsObject(simulationObjectId);
Iif (!graphicObj) return; // Skip if no graphic object found
const centredCoordStream = getCentredCoordinates(graphicObj);
const centredCoordUnit = getCentredCoordinates(selectedGraphicObject);
const distFromMainUnit = getDistanceBetweenPoints(
centredCoordStream,
centredCoordUnit
);
let newCoords = { x: graphicObj.x, y: graphicObj.y };
// Rotate and Flip Operations
if (operation == "right") {
newRotation = (currentRotation + 90) % 360;
newCoords = getCoordsClockwiseRotation(
selectedGraphicObject,
graphicObj,
centredCoordUnit,
distFromMainUnit
);
} else if (operation == "left") {
newRotation = (currentRotation - 90 + 360) % 360;
newCoords = getCoordsAntiClockwiseRotation(
selectedGraphicObject,
graphicObj,
centredCoordUnit,
distFromMainUnit
);
} else if (operation == "horizontal") {
// Rotate twice only on certain current rotation conditions. This essentilly flips the group horizontally.
Iif (currentRotation === 90 || currentRotation === 270) {
newRotation = (currentRotation + 180) % 360;
}
newFlipped = !currentFlipped;
newCoords = getCoordsFlipH(
selectedGraphicObject,
graphicObj,
centredCoordUnit,
distFromMainUnit
);
I} else if (operation == "vertical") {
// Rotate twice only on certain current rotation conditions. This essentilly flips the group vertically.
Iif (currentRotation === 0 || currentRotation === 180) {
newRotation = (currentRotation + 180) % 360;
}
newFlipped = !currentFlipped;
newCoords = getCoordsFlipV(
selectedGraphicObject,
graphicObj,
centredCoordUnit,
distFromMainUnit
);
}
// Update each object
updateGraphicObject({
id: graphicObj.id,
patchedGraphicObject: {
x: newCoords.x,
y: newCoords.y,
rotation: newRotation,
flipped: newFlipped,
},
});
// Optimistically update the rotation and flip status in the cache
dispatch(
api.util.updateQueryData(
"graphicsObjectsList",
{ group: groupId },
(cachedGraphicObjects) => {
const gObj = cachedGraphicObjects?.find(
(graphicObject) =>
graphicObject.simulationObject.id === simulationObjectId
);
Iif (gObj) {
gObj.x = newCoords.x;
gObj.y = newCoords.y;
gObj.rotation = newRotation;
gObj.flipped = newFlipped;
}
}
)
);
});
} else {
console.error(`No object selected`, objID);
}
};
const zoomToFit = () => {
let newStageX, newStageY, newScale;
const canvasWidth = canvasDiv.current?.offsetWidth || 640;
const canvasHeight = canvasDiv.current?.offsetHeight || 480;
if (currentGroupObjects?.length === 0) {
// No elements to fit, so just reset zoom
newScale = 1;
newStageX = 0;
newStageY = 0;
} else {
let minX = Infinity,
minY = Infinity,
maxX = -Infinity,
maxY = -Infinity;
currentGroupObjects?.forEach((unitOp) => {
const graphicObject = getGraphicsObject(unitOp.id);
if (graphicObject) {
const x = graphicObject.x ?? 0;
const y = graphicObject.y ?? 0;
const width = graphicObject.width ?? 0;
const height = graphicObject.height ?? 0;
minX = Math.min(minX, x); //left
minY = Math.min(minY, y); //top
maxX = Math.max(maxX, x + width); //right
maxY = Math.max(maxY, y + height); //bottom
}
});
const boundingWidth = maxX - minX;
const boundingHeight = maxY - minY;
const scaleX = canvasWidth / (boundingWidth + 500);
const scaleY = canvasHeight / (boundingHeight + 500);
newScale = Math.min(scaleX, scaleY) * 0.95; // for padding
// centering
newStageX =
(canvasWidth - boundingWidth * newScale) / 2 - minX * newScale;
newStageY =
(canvasHeight - boundingHeight * newScale) / 2 - minY * newScale;
}
changeZoom(
canvasWidth / 2,
canvasHeight / 2,
newScale / FlowsheetSurfaceState.scale,
newStageX,
newStageY
);
return { newScale, newStageX, newStageY };
};
const resetZoom = () => {
const canvasWidth = canvasDiv.current?.offsetWidth || 640;
const canvasHeight = canvasDiv.current?.offsetHeight || 480;
changeZoom(
canvasWidth / 2,
canvasHeight / 2,
1 / FlowsheetSurfaceState.scale
);
};
const onMouseDown = (e) => {
const stage = e.target.getStage();
Iif (pointerState.state === "move") {
Iif (e.evt.button == 0 || e.evt.button == 1) {
stage.draggable(true); // Enable dragging for panning
return; // Return early, disabling other interactions
}
}
if (e.currentTarget != e.target) return; // dragging a unit op
if (e.evt.button == 0) {
// left mouse button, selection rectangle
stage.draggable(false);
onSelectionStart(e);
}
Iif (e.evt.button == 1) {
// middle mouse button, enable dragging
stage.draggable(true);
return;
}
};
const onMouseMove = (e) => {
if (selectionRect.selectEnabled) {
// update selection rectangle
onResizeSelectionRect(e);
}
};
const onMouseUp = (e) => {
if (selectionRect.selectEnabled) {
onSelectionRectResizeEnd(e);
}
Iif (e.evt.button == 1) {
// middle mouse button, disable dragging
const stage = e.target.getStage();
stage.draggable(false);
return;
}
};
const onDoubleClick = (e) => {
if (e.currentTarget != e.target) return; // skip if the stage is not clicked
// clear the object selection
clearObjectSelection();
// Bring up the flowsheet details on the right side-bar
// const group = getGroup;
const newSearchParams = new URLSearchParams(searchParams);
const id = getGroup(currentGroupId).simulationObject;
newSearchParams.set("object", id.toString());
newSearchParams.set("content", ContentTypes.objectDetails);
setSearchParams(newSearchParams);
};
// Manages zoom and scrolling behaviours with mousewheel actions
const onScroll = (e) => {
// stop default scrolling
e.evt.preventDefault();
if (e.evt.ctrlKey) {
// zoom in and out
const scaleBy = 1.1;
const stage = e.target.getStage();
const scaleMultiplier = e.evt.deltaY < 0 ? scaleBy : 1 / scaleBy;
changeZoom(
stage.getPointerPosition().x,
stage.getPointerPosition().y,
scaleMultiplier
);
} else if (e.evt.shiftKey) {
// shift + scroll is horizontal scroll
setFlowsheetSurfaceState({
...FlowsheetSurfaceState,
stageX: FlowsheetSurfaceState.stageX - e.evt.deltaY * 0.3,
});
} else if (Math.abs(e.evt.deltaX) > Math.abs(e.evt.deltaY)) {
// horizontal scroll in touchpad
setFlowsheetSurfaceState({
...FlowsheetSurfaceState,
stageX: FlowsheetSurfaceState.stageX - e.evt.deltaX * 0.3,
});
} else {
// Handle vertical scrolling logic here
setFlowsheetSurfaceState({
...FlowsheetSurfaceState,
stageY: FlowsheetSurfaceState.stageY - e.evt.deltaY * 0.3,
});
}
};
//Dragging the canvas using mouse
const onStageDrag = (e) => {
if (e.currentTarget != e.target) return; // dragging a unit op
e.evt.preventDefault();
setFlowsheetSurfaceState({
...FlowsheetSurfaceState,
stageX: e.target.x(),
stageY: e.target.y(),
});
};
const extractGraphicObject = (graphicObject) => {
const objectX = +graphicObject.x;
const objectY = +graphicObject.y;
const objectWidth = +graphicObject.width;
const objectHeight = +graphicObject.height;
return { objectX, objectY, objectWidth, objectHeight };
};
const isObjectVisible = (graphicObject) => {
Iif (!graphicObject) return false;
const { objectX, objectY, objectWidth, objectHeight } =
extractGraphicObject(graphicObject);
const visibleX =
(FlowsheetSurfaceState.stageX / FlowsheetSurfaceState.scale) * -1;
const visibleY =
(FlowsheetSurfaceState.stageY / FlowsheetSurfaceState.scale) * -1;
const visibleWidth =
(canvasDiv.current?.offsetWidth || 640) / FlowsheetSurfaceState.scale;
const visibleHeight =
(canvasDiv.current?.offsetHeight || 480) / FlowsheetSurfaceState.scale;
const isVisible =
objectX + objectWidth >= visibleX &&
objectX <= visibleX + visibleWidth &&
objectY + objectHeight >= visibleY &&
objectY <= visibleY + visibleHeight;
return isVisible;
};
const moveCanvasToObject = (graphicObject) => {
const { objectX, objectY, objectWidth, objectHeight } =
extractGraphicObject(graphicObject);
const canvasWidth = canvasDiv.current?.offsetWidth || 640;
const canvasHeight = canvasDiv.current?.offsetHeight || 480;
const newStageX =
canvasWidth / 2 -
(objectX + objectWidth / 2) * FlowsheetSurfaceState.scale;
const newStageY =
canvasHeight / 2 -
(objectY + objectHeight / 2) * FlowsheetSurfaceState.scale;
setFlowsheetSurfaceState({
...FlowsheetSurfaceState,
stageX: newStageX,
stageY: newStageY,
});
};
const onObjectSelect = (objectId: number) => {
const graphicObject = objectsGraphicObjectsMap.get(objectId);
Iif (graphicObject && !isObjectVisible(graphicObject)) {
moveCanvasToObject(graphicObject);
}
};
const convertStreamToDecisionNode = (streamID: number) => {
convertStreamToDN(streamID);
};
const groupSelectedObjects = () => {
makeGroup();
};
const unGroupCurrentObject = () => {
const group = simulationObjectGroup(currentObject.id);
ungroup({
ungroup: {
parentGroup: group.id,
},
});
optimisticallyDeleteSelection([currentObject.id]);
clearObjectSelection();
};
// After creating a new object, update its group
const handleObjectCreation = async (objectData) => {
try {
// CRITICAL FIX: Track ADD operations for undo/redo in drag-and-drop
const response = await createObject({
simulationObject: objectData,
}).unwrap();
// Track the ADD command for undo/redo
if (response?.id) {
const addCommand = createAddCommand({
objectId: response.id,
graphicObjectId: response.graphics_object?.id || response.id,
objectType: objectData.objectType,
simulationObject: response,
position: { x: objectData.x, y: objectData.y },
groupId: objectData.parentGroup,
});
addHistory(addCommand);
}
} catch (error) {
console.error("Failed to create object or update group:", error);
}
};
function getConnectedStreams(unitopId: number): number[] {
const streams: number[] = [];
ports?.forEach((port) => {
Iif (port.unitOp === unitopId && port.stream != null) {
streams.push(port.stream);
}
});
return streams;
}
const handleObjectCopy = () => {
if (selectionRect.selectVisible) {
dispatch(setCopiedObject(selectionRect.containedObjects));
E} else if (currentObject && currentObject.id) {
// Get connected streams
const connectedStreams = getConnectedStreams(currentObject.id);
// Include the unitop and its connected streams
const objectsToCopy = [currentObject.id, ...connectedStreams];
dispatch(setCopiedObject(objectsToCopy));
} else {
toast.error("No object selected to copy.");
}
return;
};
const handleObjectPaste = (position: { x: number; y: number }) => {
const pos = position || {
x: props.canvasWidth / 2,
y: props.canvasHeight / 2,
};
if (copiedObjects) {
const flowsheetX = canvasToFlowsheetCoords(
pos.x,
FlowsheetSurfaceState.stageX,
FlowsheetSurfaceState.scale
);
const flowsheetY = canvasToFlowsheetCoords(
pos.y,
FlowsheetSurfaceState.stageY,
FlowsheetSurfaceState.scale
);
duplicateObject({
duplicateSimulationObject: {
objectIDs: copiedObjects,
x: flowsheetX,
y: flowsheetY,
},
}).unwrap();
} else E{
toast.error("No object copied to paste.");
}
};
function handleControlVPaste() {
const canvasWidth = canvasDiv.current.offsetWidth;
const canvasHeight = canvasDiv.current.offsetHeight;
if (copiedObjects) {
const flowsheetX = canvasToFlowsheetCoords(
canvasWidth / 2,
FlowsheetSurfaceState.stageX,
FlowsheetSurfaceState.scale
);
const flowsheetY = canvasToFlowsheetCoords(
canvasHeight / 2,
FlowsheetSurfaceState.stageY,
FlowsheetSurfaceState.scale
);
duplicateObject({
duplicateSimulationObject: {
objectIDs: copiedObjects,
x: flowsheetX,
y: flowsheetY,
},
}).unwrap();
} else {
toast.error("No object copied to paste.");
}
}
return {
FlowsheetSurfaceState: FlowsheetSurfaceState,
changeZoom: changeZoom,
handleDrop: handleDrop,
onKeyDown: onKeyDown,
onMouseDown: onMouseDown,
onMouseUp: onMouseUp,
onMouseMove: onMouseMove,
onDoubleClick: onDoubleClick,
onScroll: onScroll,
onStageDrag: onStageDrag,
zoomToFit: zoomToFit,
resetZoom: resetZoom,
deleteSelectedObject: deleteSelectedObject,
rotateFlipSelectedObject: rotateFlipSelectedObject,
onObjectSelect,
convertStreamToDecisionNode,
groupSelectedObjects,
unGroupCurrentObject,
handleObjectCopy,
handleObjectPaste,
selectionRect,
loading,
setSelectionRect,
};
};
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