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Mac: Shift+click to select a range of list items

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This commit is contained in:
Ben Olden-Cooligan 2023-03-13 18:03:46 -07:00
parent a84ef8a9ee
commit 1ab37aa9f1
1 changed files with 34 additions and 0 deletions
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34
NAPS2.Lib.Mac/EtoForms/Mac/MacListView.cs
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@ -17,6 +17,7 @@ public class MacListView<T> : NSCollectionViewDelegateFlowLayout, IListView<T> w
private ListSelection<T> _selection = ListSelection.Empty<T>();
private bool _refreshing;
private ContextMenu? _contextMenu;
private NSIndexPath? _lastClickedIndexPath;
public MacListView(ListViewBehavior<T> behavior)
{
@ -228,6 +229,39 @@ public class MacListView<T> : NSCollectionViewDelegateFlowLayout, IListView<T> w
SelectionChanged?.Invoke(this, EventArgs.Empty);
}
public override NSSet ShouldDeselectItems(NSCollectionView collectionView, NSSet indexPaths)
{
_lastClickedIndexPath = null;
return indexPaths;
}
public override NSSet ShouldSelectItems(NSCollectionView collectionView, NSSet indexPaths)
{
// We want shift+click to select a range, instead of behaving the same as command+click.
if (indexPaths.Count != 1)
{
_lastClickedIndexPath = null;
return indexPaths;
}
var indexPath = (NSIndexPath) indexPaths.AnyObject;
var prevIndexPath = _lastClickedIndexPath;
_lastClickedIndexPath = indexPath;
var isShiftHeld = (NSEvent.CurrentModifierFlags & NSEventModifierMask.ShiftKeyMask) != 0;
if (!isShiftHeld || prevIndexPath == null)
{
return indexPaths;
}
var newIndexPaths = new NSMutableSet();
var min = Math.Min((int) indexPath.Item, (int) prevIndexPath.Item);
var max = Math.Max((int) indexPath.Item, (int) prevIndexPath.Item);
for (var i = min; i <= max; i++)
{
newIndexPaths.Add(NSIndexPath.Create(0, i));
}
return newIndexPaths;
}
public override void ItemsChanged(NSCollectionView collectionView, NSSet indexPaths,
NSCollectionViewItemHighlightState highlightState)
{