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v1 Fixes #2897. ListView ListWrapper - marking does work if you give an IList which in which the count changes

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BDisp
2024-05-26 17:23:19 +01:00
parent c93afc7787
commit 87ea75b3c1
1 changed files with 27 additions and 3 deletions
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30
Terminal.Gui/Views/ListView.cs
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@@ -749,6 +749,11 @@ namespace Terminal.Gui {
public void EnsureSelectedItemVisible ()
{
SuperView?.LayoutSubviews ();
// If last item is selected and is removed, ensures a valid selected item
if (Source != null && selected > Source.Count - 1) {
SelectedItem = Source.Count - 1;
SetNeedsDisplay ();
}
if (selected < top) {
top = selected;
} else if (Frame.Height > 0 && selected >= top + Frame.Height) {
@@ -831,11 +836,30 @@ namespace Terminal.Gui {
}
/// <inheritdoc/>
public int Count => src != null ? src.Count : 0;
public int Count {
get {
CheckAndResizeMarksIfRequired ();
return src?.Count ?? 0;
}
}
/// <inheritdoc/>
public int Length => len;
void CheckAndResizeMarksIfRequired ()
{
if (count != src.Count) {
count = src.Count;
BitArray newMarks = new BitArray (count);
for (var i = 0; i < Math.Min (marks.Length, newMarks.Length); i++) {
newMarks [i] = marks [i];
}
marks = newMarks;
len = GetMaxLengthItem ();
}
}
int GetMaxLengthItem ()
{
if (src == null || src?.Count == 0) {
@@ -896,7 +920,7 @@ namespace Terminal.Gui {
/// <inheritdoc/>
public bool IsMarked (int item)
{
if (item >= 0 && item < count)
if (item >= 0 && item < Count)
return marks [item];
return false;
}
@@ -904,7 +928,7 @@ namespace Terminal.Gui {
/// <inheritdoc/>
public void SetMark (int item, bool value)
{
if (item >= 0 && item < count)
if (item >= 0 && item < Count)
marks [item] = value;
}