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Copy pathModelSystemCanvas.ContextMenu.cs
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743 lines (662 loc) · 33.1 KB
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/*
Copyright 2026 University of Toronto
This file is part of XTMF2.
XTMF2 is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
XTMF2 is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with XTMF2. If not, see <http://www.gnu.org/licenses/>.
*/
using System;
using System.Collections.Generic;
using System.Linq;
using Avalonia.Controls;
using Avalonia.Styling;
using XTMF2.GUI.ViewModels;
using XTMF2.ModelSystemConstruct;
namespace XTMF2.GUI.Controls;
partial class ModelSystemCanvas
{
private void ShowContextMenu(ICanvasElement? element, LinkViewModel? link)
{
if (_vm is null) return;
// ── Background right-click: offer Add items when nothing was hit ──
if (element is null && link is null)
{
var bgMenu = new ContextMenu();
var spawnPt = ToCanvasPos(_rightClickPressPos);
var addStartItem = new MenuItem { Header = "Add Start…" };
addStartItem.Click += (_, _) => _vm.AddStartAt(spawnPt.X, spawnPt.Y);
bgMenu.Items.Add(addStartItem);
var addModuleItem = new MenuItem { Header = "Add Module…" };
addModuleItem.Click += (_, _) => _ = _vm.AddModuleAtAsync(spawnPt.X, spawnPt.Y);
bgMenu.Items.Add(addModuleItem);
var addCommentItem = new MenuItem { Header = "Add Comment" };
addCommentItem.Click += (_, _) => _vm.AddCommentBlockAt(spawnPt.X, spawnPt.Y);
bgMenu.Items.Add(addCommentItem);
var addFtItem = new MenuItem { Header = "Add Function Template…" };
addFtItem.Click += (_, _) => _ = _vm.AddFunctionTemplateAtAsync(spawnPt.X, spawnPt.Y);
bgMenu.Items.Add(addFtItem);
var addFiItem = new MenuItem { Header = "Add Function Instance…" };
addFiItem.Click += (_, _) => _ = _vm.AddFunctionInstanceAtAsync(spawnPt.X, spawnPt.Y);
bgMenu.Items.Add(addFiItem);
if (_vm.IsInsideFunctionTemplate)
{
bgMenu.Items.Add(new Separator());
var addFpItem = new MenuItem { Header = "Add Function Parameter…" };
addFpItem.Click += (_, _) => _ = _vm.AddFunctionParameterDirectAsync(spawnPt.X, spawnPt.Y);
bgMenu.Items.Add(addFpItem);
}
// ── Paste (always available; reads system clipboard at click-time) ────
bgMenu.Items.Add(new Separator());
var pasteItem = new MenuItem { Header = "Paste\tCtrl+V" };
pasteItem.Click += (_, _) => _ = PasteElementsAsync(spawnPt.X, spawnPt.Y);
bgMenu.Items.Add(pasteItem);
ContextMenu = bgMenu;
ContextMenu.Open(this);
return;
}
var vm = _vm; // capture for closure
var menu = new ContextMenu();
// ── Hook-specific items ───────────────────────────────────────────
if (_rightClickHookHit is { } hookEntry)
{
var capturedNode = hookEntry.Node;
var capturedHook = hookEntry.Hook;
// "Expand parameter to its own module" when the hook has an inlined BasicParam.
if (_hookInlinedParam.TryGetValue((capturedNode, capturedHook), out var inlinedParamNode))
{
var capturedParam = inlinedParamNode;
var expandItem = new MenuItem { Header = "Expand parameter to its own module" };
expandItem.Click += (_, _) =>
{
double rw = NodeRenderWidth(capturedNode);
capturedParam.ExpandToCanvas(capturedNode.X + rw + 30.0, capturedNode.Y);
};
menu.Items.Add(expandItem);
// Offer switching between BasicParameter and ScriptedParameter.
if (capturedParam.IsBasicParameter || capturedParam.IsScriptedParameter)
{
var switchHeader = capturedParam.IsBasicParameter
? "Switch to Scripted Parameter"
: "Switch to Basic Parameter";
var switchItem = new MenuItem { Header = switchHeader };
switchItem.Click += (_, _) =>
{
if (!capturedParam.SwitchParameterType(out var err))
vm.ShowToast(err?.Message ?? "Could not switch parameter type.",
isError: true, durationMs: 6000);
};
menu.Items.Add(switchItem);
}
menu.Items.Add(new Separator());
}
var interBoundaryItem = new MenuItem { Header = "Link to node in another boundary…" };
interBoundaryItem.Click += (_, _) =>
_ = vm.CreateInterBoundaryLinkAsync(capturedNode, capturedHook);
menu.Items.Add(interBoundaryItem);
// If this hook already has a MultiLink, offer to reorder its destinations.
var hookMultiLink = _vm.Links
.Select(lvm => lvm.UnderlyingLink)
.OfType<MultiLink>()
.FirstOrDefault(ml => ml.OriginHook == capturedHook
&& ml.Origin == capturedNode.UnderlyingNode);
if (hookMultiLink is not null)
{
var capturedHookMl = hookMultiLink;
var reorderHookItem = new MenuItem { Header = "Reorder Destinations…" };
reorderHookItem.Click += (_, _) => _ = vm.ReorderLinkDestinationsAsync(capturedHookMl);
menu.Items.Add(reorderHookItem);
}
// Inside a function template, offer creating a FunctionParameter from a regular node hook.
if (vm.IsInsideFunctionTemplate && capturedHook is not FunctionParameterHook)
{
var spawnPt2 = ToCanvasPos(_rightClickPressPos);
var addFpItem = new MenuItem { Header = "Add Function Parameter" };
addFpItem.Click += (_, _) =>
_ = vm.AddFunctionParameterFromHookAsync(
capturedNode, capturedHook, spawnPt2.X, spawnPt2.Y);
menu.Items.Add(addFpItem);
}
// Clear all links from this hook if any exist.
var hookLinks = _vm.Links
.Where(lvm => lvm.UnderlyingLink.Origin == capturedNode.UnderlyingNode
&& lvm.UnderlyingLink.OriginHook == capturedHook)
.ToList();
if (hookLinks.Count > 0)
{
var clearHookItem = new MenuItem { Header = "Clear Hook" };
clearHookItem.Click += (_, _) => vm.ClearHookLinks(capturedNode, capturedHook);
menu.Items.Add(clearHookItem);
}
menu.Items.Add(new Separator());
}
// ── FunctionInstance hook right-click items ────────────────────────────
if (_rightClickFiHookHit is { } fiHookEntry)
{
var capturedFiOrigin = fiHookEntry.Fi;
var capturedFpHook = fiHookEntry.Hook;
// "Expand parameter to its own module" when the FI hook has an inlined param.
if (_fiHookInlinedParam.TryGetValue((capturedFiOrigin, capturedFpHook), out var inlinedFiParamNode))
{
var capturedFiParam = inlinedFiParamNode;
var expandFiItem = new MenuItem { Header = "Expand parameter to its own module" };
expandFiItem.Click += (_, _) =>
{
double rw2 = capturedFiOrigin.Width;
capturedFiParam.ExpandToCanvas(capturedFiOrigin.X + rw2 + 30.0, capturedFiOrigin.Y);
};
menu.Items.Add(expandFiItem);
// Offer switching between BasicParameter and ScriptedParameter.
if (capturedFiParam.IsBasicParameter || capturedFiParam.IsScriptedParameter)
{
var switchFiHeader = capturedFiParam.IsBasicParameter
? "Switch to Scripted Parameter"
: "Switch to Basic Parameter";
var switchFiItem = new MenuItem { Header = switchFiHeader };
switchFiItem.Click += (_, _) =>
{
if (!capturedFiParam.SwitchParameterType(out var err))
vm.ShowToast(err?.Message ?? "Could not switch parameter type.",
isError: true, durationMs: 6000);
};
menu.Items.Add(switchFiItem);
}
}
var allBoundariesItem = new MenuItem { Header = "Link to node in another boundary…" };
allBoundariesItem.Click += (_, _) =>
_ = vm.CreateInterBoundaryLinkAsync(capturedFiOrigin, capturedFpHook);
menu.Items.Add(allBoundariesItem);
// Clear all links from this FI hook if any exist.
var fiHookLinks = _vm.Links
.Where(lvm => lvm.UnderlyingLink.Origin == capturedFiOrigin.UnderlyingInstance
&& lvm.UnderlyingLink.OriginHook == capturedFpHook)
.ToList();
if (fiHookLinks.Count > 0)
{
var clearFiHookItem = new MenuItem { Header = "Clear Hook" };
clearFiHookItem.Click += (_, _) => vm.ClearFiHookLinks(capturedFiOrigin, capturedFpHook);
menu.Items.Add(clearFiHookItem);
}
menu.Items.Add(new Separator());
}
// ── Link routing style ────────────────────────────────────────────────
if (link is not null)
{
var capturedRoutingLink = link;
var routingHeader = link.UnderlyingLink.IsOrthogonal
? "Switch to Curved Routing"
: "Switch to Orthogonal Routing";
var routingItem = new MenuItem { Header = routingHeader };
routingItem.Click += (_, _) => vm.ToggleLinkOrthogonal(capturedRoutingLink.UnderlyingLink);
menu.Items.Add(routingItem);
bool nextDisabled = !link.UnderlyingLink.IsDisabled;
var toggleDisableItem = new MenuItem
{
Header = nextDisabled ? "Disable Link" : "Enable Link"
};
toggleDisableItem.Click += (_, _) =>
{
if (!vm.Session.SetLinkDisabled(vm.User, link.UnderlyingLink, nextDisabled, out var err))
{
vm.ShowToast(err?.Message ?? "Unable to change link disabled state.",
isError: true, durationMs: 6000);
}
InvalidateVisual();
};
menu.Items.Add(toggleDisableItem);
menu.Items.Add(new Separator());
}
// ── MultiLink: reorder destinations ──────────────────────────────────
if (link?.UnderlyingLink is MultiLink reorderMl)
{
var capturedReorderMl = reorderMl;
var reorderLinkItem = new MenuItem { Header = "Reorder Destinations…" };
reorderLinkItem.Click += (_, _) => _ = vm.ReorderLinkDestinationsAsync(capturedReorderMl);
menu.Items.Add(reorderLinkItem);
menu.Items.Add(new Separator());
}
// ── Standard Delete ───────────────────────────────────────────────
var deleteItem = new MenuItem { Header = "Delete" };
deleteItem.Click += (_, _) =>
{
if (element is not null)
vm.SelectElementCommand.Execute(element);
else
vm.SelectLinkCommand.Execute(link);
_ = vm.DeleteSelectedCommand.ExecuteAsync(null);
};
// ── Enable/Disable regular nodes ─────────────────────────────────
if (element is NodeViewModel disableNodeVm)
{
bool nextDisabled = !disableNodeVm.UnderlyingNode.IsDisabled;
var disableNodeItem = new MenuItem
{
Header = nextDisabled ? "Disable Node" : "Enable Node"
};
disableNodeItem.Click += (_, _) =>
{
if (!vm.Session.SetNodeDisabled(vm.User, disableNodeVm.UnderlyingNode, nextDisabled, out var err))
{
vm.ShowToast(err?.Message ?? "Unable to change node disabled state.",
isError: true, durationMs: 6000);
}
InvalidateVisual();
};
menu.Items.Add(disableNodeItem);
menu.Items.Add(new Separator());
}
// ── Variable list management + inline option ────────────────────
if (element is NodeViewModel paramNode && paramNode.IsParameterNode)
{
// "Inline parameter" — only when this BasicParam is wired to a Single hook.
if (_canInlineNodes.Contains(paramNode))
{
var inlineItem = new MenuItem { Header = "Inline parameter into parent hook" };
inlineItem.Click += (_, _) => paramNode.InlineBasicParameter();
menu.Items.Add(inlineItem);
}
// Offer switching between BasicParameter and ScriptedParameter.
if (paramNode.IsBasicParameter || paramNode.IsScriptedParameter)
{
var switchHeader = paramNode.IsBasicParameter
? "Switch to Scripted Parameter"
: "Switch to Basic Parameter";
var capturedParamNode = paramNode;
var switchItem = new MenuItem { Header = switchHeader };
switchItem.Click += (_, _) =>
{
if (!capturedParamNode.SwitchParameterType(out var err))
vm.ShowToast(err?.Message ?? "Could not switch parameter type.",
isError: true, durationMs: 6000);
};
menu.Items.Add(switchItem);
}
menu.Items.Add(new Separator());
if (vm.IsInsideFunctionTemplate)
{
// Inside a FunctionTemplate: only offer local variables for eligible node types.
if (FunctionTemplate.IsValidLocalVariableNode(paramNode.UnderlyingNode, out _))
{
bool alreadyLocalVar = vm.IsNodeInLocalVariables(paramNode);
var localVarHeader = alreadyLocalVar
? "Remove from Local Variables"
: "Add as Local Variable";
var localVarItem = new MenuItem { Header = localVarHeader };
localVarItem.Click += (_, _) =>
{
if (vm.IsNodeInLocalVariables(paramNode))
{
_ = vm.RemoveNodeFromLocalVariablesAsync(paramNode);
}
else
{
_ = vm.AddNodeToLocalVariablesAsync(paramNode);
}
};
menu.Items.Add(localVarItem);
menu.Items.Add(new Separator());
}
}
else
{
bool alreadyVar = vm.IsNodeInVariables(paramNode);
var varHeader = alreadyVar
? "Remove from Model System Variables"
: "Add to Model System Variables";
var varItem = new MenuItem { Header = varHeader };
varItem.Click += (_, _) =>
{
if (vm.IsNodeInVariables(paramNode))
{
_ = vm.RemoveNodeFromVariablesAsync(paramNode);
}
else
{
_ = vm.AddNodeToVariablesAsync(paramNode);
}
};
menu.Items.Add(varItem);
menu.Items.Add(new Separator());
// ── Estimation / Calibration (float or double BasicParameter only) ──
if (paramNode.IsNumericBasicParameter)
{
bool alreadyEst = vm.IsNodeInEstimation(paramNode);
var estHeader = alreadyEst
? "Remove from Estimation Parameters"
: "Add to Estimation Parameters";
var capturedEstNode = paramNode;
var estItem = new MenuItem { Header = estHeader };
estItem.Click += (_, _) =>
{
if (vm.IsNodeInEstimation(capturedEstNode))
_ = vm.RemoveNodeFromEstimationAsync(capturedEstNode);
else
_ = vm.AddNodeToEstimationAsync(capturedEstNode);
};
menu.Items.Add(estItem);
bool alreadyCal = vm.IsNodeInCalibration(paramNode);
var calHeader = alreadyCal
? "Remove from Calibration Parameters"
: "Add to Calibration Parameters";
var capturedCalNode = paramNode;
var calItem = new MenuItem { Header = calHeader };
calItem.Click += (_, _) =>
{
if (vm.IsNodeInCalibration(capturedCalNode))
_ = vm.RemoveNodeFromCalibrationAsync(capturedCalNode);
else
_ = vm.AddNodeToCalibrationAsync(capturedCalNode);
};
menu.Items.Add(calItem);
menu.Items.Add(new Separator());
}
}
}
// ── IFunction<T> → Create linked ExecuteWithContext ───────────────
if (element is NodeViewModel funcNode)
{
var nodeType = funcNode.UnderlyingNode.Type;
var iFunctionOpen = typeof(IFunction<>);
Type? returnType = null;
if (nodeType is not null)
{
foreach (var iface in nodeType.GetInterfaces())
{
if (iface.IsGenericType && iface.GetGenericTypeDefinition() == iFunctionOpen)
{
returnType = iface.GetGenericArguments()[0];
break;
}
}
}
if (returnType is not null)
{
var capturedFuncNode = funcNode;
var wrapItem = new MenuItem
{
Header = $"Create ExecuteWithContext<{returnType.Name}> (linked)"
};
wrapItem.Click += (_, _) => _ = vm.CreateExecuteWithContextAsync(capturedFuncNode);
menu.Items.Add(wrapItem);
menu.Items.Add(new Separator());
}
}
// ── Create Ghost Node + Move to Boundary (regular nodes) ───────────────────
if (element is NodeViewModel ghostSourceNode)
{
var capturedGhostSource = ghostSourceNode;
var ghostItem = new MenuItem { Header = "Create Ghost Node" };
ghostItem.Click += (_, _) =>
{
double rw = NodeRenderWidth(capturedGhostSource);
double rh = NodeRenderHeight(capturedGhostSource);
const double gap = 30.0;
int gx = (int)(capturedGhostSource.X + rw + gap);
int gy = (int)capturedGhostSource.Y;
int gw = (int)rw;
int gh = (int)rh;
vm.CreateGhostNode(capturedGhostSource, gx, gy, gw, gh);
};
var moveNodeItem = new MenuItem { Header = "Move to Boundary…" };
moveNodeItem.Click += async (_, _) =>
{
await vm.MoveNodeToBoundaryAsync(capturedGhostSource);
InvalidateAndMeasure();
};
menu.Items.Add(new Separator());
menu.Items.Add(ghostItem);
menu.Items.Add(moveNodeItem);
}
// ── Extract to Function Template ───────────────────────────────────────
// Available for regular nodes and function instances when NOT already inside
// a function template's InternalModules view.
if ((element is NodeViewModel extractSourceNode && !extractSourceNode.IsParameterNode
|| element is FunctionInstanceViewModel)
&& !vm.IsInsideFunctionTemplate)
{
// If the right-clicked element is part of a multi-selection, operate on all
// selected extractable elements; otherwise operate on just this one.
IReadOnlyList<ICanvasElement> selElements =
_multiSelection.Count > 1 && _multiSelection.Contains(element)
? _multiSelection.ToList()
: new[] { element! };
int extractCount = selElements.Count(el =>
el is NodeViewModel envm && !envm.IsParameterNode
|| el is FunctionInstanceViewModel);
string extractHeader = extractCount > 1
? $"Extract {extractCount} Elements to Function Template…\tCtrl+Shift+M"
: "Extract to Function Template…\tCtrl+Shift+M";
var capturedExtractElements = selElements;
var extractItem = new MenuItem { Header = extractHeader };
extractItem.Click += (_, _) => _ = vm.ExtractSelectionToFunctionTemplateAsync(capturedExtractElements);
menu.Items.Add(new Separator());
menu.Items.Add(extractItem);
}
// ── Move to Boundary (ghost nodes) ────────────────────────────────────
if (element is GhostNodeViewModel capturedGhost)
{
var moveGhostItem = new MenuItem { Header = "Move to Boundary…" };
moveGhostItem.Click += async (_, _) =>
{
await vm.MoveGhostNodeToBoundaryAsync(capturedGhost);
InvalidateAndMeasure();
};
menu.Items.Add(new Separator());
menu.Items.Add(moveGhostItem);
}
// ── Function template – specific items ─────────────────────────────
if (element is FunctionTemplateViewModel capturedFt)
{
// Enter: navigate into the template's InternalModules
var enterItem = new MenuItem { Header = "Edit Contents (double-click)" };
enterItem.Click += (_, _) =>
{
vm.NavigateIntoFunctionTemplate(capturedFt);
InvalidateAndMeasure();
};
// Rename
var renameItem = new MenuItem { Header = "Rename…" };
renameItem.Click += async (_, _) =>
{
await vm.RenameFunctionTemplateAsync(capturedFt);
InvalidateAndMeasure();
};
// Move to Boundary
var moveFtItem = new MenuItem { Header = "Move to Boundary…" };
moveFtItem.Click += async (_, _) =>
{
await vm.MoveFunctionTemplateToBoundaryAsync(capturedFt);
InvalidateAndMeasure();
};
menu.Items.Add(new Separator());
menu.Items.Add(enterItem);
menu.Items.Add(renameItem);
menu.Items.Add(moveFtItem);
}
// ── Function instance – specific items ─────────────────────────────
if (element is FunctionInstanceViewModel capturedFi)
{
var openTemplateItem = new MenuItem { Header = "Open Template" };
openTemplateItem.Click += (_, _) =>
{
vm.OpenFunctionTemplateOfInstance(capturedFi);
InvalidateAndMeasure();
};
var expandItem = new MenuItem { Header = "Expand Function Instance" };
expandItem.Click += async (_, _) =>
{
await vm.ExpandFunctionInstanceAsync(capturedFi);
InvalidateAndMeasure();
};
var renameItem = new MenuItem { Header = "Rename…" };
renameItem.Click += async (_, _) =>
{
await vm.RenameFunctionInstanceAsync(capturedFi);
InvalidateAndMeasure();
};
var moveFiItem = new MenuItem { Header = "Move to Boundary…" };
moveFiItem.Click += async (_, _) =>
{
await vm.MoveFunctionInstanceToBoundaryAsync(capturedFi);
InvalidateAndMeasure();
};
bool nextDisabled = !capturedFi.UnderlyingInstance.IsDisabled;
var disableFiItem = new MenuItem
{
Header = nextDisabled ? "Disable Function Instance" : "Enable Function Instance"
};
disableFiItem.Click += (_, _) =>
{
if (!vm.Session.SetNodeDisabled(vm.User, capturedFi.UnderlyingInstance, nextDisabled, out var err))
{
vm.ShowToast(err?.Message ?? "Unable to change function instance disabled state.",
isError: true, durationMs: 6000);
}
InvalidateVisual();
};
menu.Items.Add(new Separator());
menu.Items.Add(openTemplateItem);
menu.Items.Add(expandItem);
menu.Items.Add(renameItem);
menu.Items.Add(moveFiItem);
menu.Items.Add(disableFiItem);
}
// ── "Add Function Parameter" — when we're inside a function template ─────
if (_vm.IsInsideFunctionTemplate && element is FunctionParameterViewModel)
{
// Right-clicking an existing FunctionParameter: offer rename or remove.
var fpvm = (FunctionParameterViewModel)element;
var template = _vm.CurrentFunctionTemplate?.UnderlyingTemplate;
// ── Local-variable toggle (only for IFunction<basicType> parameters) ──
if (template is not null
&& FunctionTemplate.IsValidLocalVariableNode(fpvm.UnderlyingParameter, out _))
{
bool isAlreadyVar = template.LocalVariables.Contains(fpvm.UnderlyingParameter);
var localVarHeader = isAlreadyVar
? "Remove from Local Variables"
: "Add as Local Variable";
var localVarItem = new MenuItem { Header = localVarHeader };
localVarItem.Click += async (_, _) =>
{
await vm.ToggleFunctionTemplateVariableAsync(fpvm.UnderlyingParameter);
InvalidateAndMeasure();
};
menu.Items.Add(new Separator());
menu.Items.Add(localVarItem);
}
var fpRenameItem = new MenuItem { Header = "Rename…" };
fpRenameItem.Click += async (_, _) =>
{
await vm.RenameFunctionParameterAsync(fpvm);
InvalidateAndMeasure();
};
var removeItem = new MenuItem { Header = "Remove Function Parameter" };
removeItem.Click += (_, _) =>
{
vm.RemoveFunctionParameterAsync(fpvm.UnderlyingParameter);
InvalidateAndMeasure();
};
menu.Items.Add(new Separator());
menu.Items.Add(fpRenameItem);
menu.Items.Add(removeItem);
}
// ── "Set as Entry Node" — any node while viewing InternalModules ─────────
if (_vm.IsInsideFunctionTemplate && element is NodeViewModel entryNodeCandidate)
{
var currentEntry = _vm.CurrentFunctionTemplate?.UnderlyingTemplate.EntryNode;
bool alreadyEntry = ReferenceEquals(currentEntry, entryNodeCandidate.UnderlyingNode);
var entryHeader = alreadyEntry ? "Clear Entry Node" : "Set as Entry Node";
var capturedEntryCandidate = entryNodeCandidate;
var entryItem = new MenuItem { Header = entryHeader };
entryItem.Click += async (_, _) =>
{
await vm.SetFunctionTemplateEntryNodeAsync(capturedEntryCandidate);
InvalidateAndMeasure();
};
menu.Items.Add(new Separator());
menu.Items.Add(entryItem);
}
// ── Copy ──────────────────────────────────────────────────────────────
bool isCopyable = element switch
{
NodeViewModel nvm => !nvm.IsInlined,
CommentBlockViewModel => true,
FunctionTemplateViewModel => true,
FunctionInstanceViewModel => true,
GhostNodeViewModel => true,
_ => false,
};
if (isCopyable)
{
var capturedElement = element;
menu.Items.Add(new Separator());
// Count copyable elements in the active selection.
int copyCount = _multiSelection.Count > 0 && _multiSelection.Contains(capturedElement!)
? _multiSelection.Count(el => el switch
{
NodeViewModel nvm2 => !nvm2.IsInlined,
CommentBlockViewModel => true,
FunctionTemplateViewModel => true,
FunctionInstanceViewModel => true,
GhostNodeViewModel => true,
_ => false,
})
: 1;
string copyHeader = copyCount > 1 ? $"Copy {copyCount} Elements\tCtrl+C" : "Copy\tCtrl+C";
var copyItem = new MenuItem { Header = copyHeader };
copyItem.Click += (_, _) =>
{
// Narrow selection to just this element when it isn't already multi-selected.
if (_multiSelection.Count == 0 || !_multiSelection.Contains(capturedElement!))
{
ClearMultiSelection();
if (_vm is not null) _vm.SelectElementCommand.Execute(capturedElement);
}
_ = CopySelectedElementsAsync();
};
menu.Items.Add(copyItem);
}
// ── Align (multi-selection only) ──────────────────────────────────────
if (_multiSelection.Count > 1)
{
menu.Items.Add(new Separator());
var alignMenu = new MenuItem { Header = "Align" };
void AddAlignItem(string header, AlignMode m)
{
var item = new MenuItem { Header = header };
item.Click += (_, _) => AlignSelectedElements(m);
alignMenu.Items.Add(item);
}
AddAlignItem("Align Left Edges", AlignMode.Left);
AddAlignItem("Align Right Edges", AlignMode.Right);
alignMenu.Items.Add(new Separator());
AddAlignItem("Align Top Edges", AlignMode.Top);
AddAlignItem("Align Bottom Edges", AlignMode.Bottom);
alignMenu.Items.Add(new Separator());
AddAlignItem("Center on Vertical Axis", AlignMode.CenterVertical);
AddAlignItem("Center on Horizontal Axis", AlignMode.CenterHorizontal);
menu.Items.Add(alignMenu);
// Distribute requires at least 3 elements to have visible effect.
if (_multiSelection.Count >= 3)
{
var distributeMenu = new MenuItem { Header = "Distribute" };
var distH = new MenuItem { Header = "Distribute Horizontally" };
distH.Click += (_, _) => DistributeSelectedElements(horizontal: true);
distributeMenu.Items.Add(distH);
var distV = new MenuItem { Header = "Distribute Vertically" };
distV.Click += (_, _) => DistributeSelectedElements(horizontal: false);
distributeMenu.Items.Add(distV);
menu.Items.Add(distributeMenu);
}
}
menu.Items.Add(deleteItem);
ContextMenu = menu;
ContextMenu.Open(this);
}
}