Fix Asset List rows vanishing after switching tabs - #8
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The asset and class lists are double-buffered (LVS_EX_DOUBLEBUFFER). When their tab is hidden and shown again — e.g. filter the Asset List, switch to Asset Classes, switch back — the stale back buffer is blitted, so the rows look gone and only paint (offset) where the mouse later invalidates. Force a full Invalidate() on the list when its tab becomes active. Co-Authored-By: Clue Opus 4.8 <noreply@anthropic.com>
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Bug
Filter the Asset List by type (e.g. VideoClip), switch to the Asset Classes tab, then switch back to Asset List — the rows are gone. Moving the mouse makes them reappear, but offset toward the middle instead of at the top.
Cause
The Asset List (and Asset Classes) list is a double-buffered
ListView(LVS_EX_DOUBLEBUFFER, added for smooth virtual scrolling). When its TabPage is hidden and later shown, WinForms blits the stale back buffer instead of repainting, so the rows look gone; only the regions the mouse later invalidates get painted (hence the partial, offset rows).Fix
Force a full
Invalidate()on the relevant list when its tab becomes active (tabControl1.Selected), for both the Asset List and Asset Classes tabs.Verified