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Clipper: hotfix (amend 93cccd2, was broken) (#3841, #1725)

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ocornut 2021-11-04 15:14:35 +01:00
parent 64daeddf6f
commit 32779c5b64
1 changed files with 14 additions and 12 deletions
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26
imgui.cpp
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@ -2357,7 +2357,7 @@ ImGuiListClipper::ImGuiListClipper()
ImGuiListClipper::~ImGuiListClipper()
{
IM_ASSERT(ItemsCount == -1 && "Forgot to call End(), or to Step() until false?");
End();
}
// Use case A: Begin() called from constructor with items_height<0, then called again from Step() in StepNo 1
@ -2388,22 +2388,24 @@ void ImGuiListClipper::Begin(int items_count, float items_height)
void ImGuiListClipper::End()
{
ImGuiContext& g = *GImGui;
if (ItemsCount < 0) // Already ended
return;
// In theory here we should assert that we are already at the right position, but it seems saner to just seek at the end and not assert/crash the user.
ImGuiListClipperData* data = (ImGuiListClipperData*)TempData;
if (ItemsCount < INT_MAX && DisplayStart >= 0)
ImGuiContext& g = *GImGui;
if (ItemsCount >= 0 && ItemsCount < INT_MAX && DisplayStart >= 0)
ImGuiListClipper_SeekCursorForItem(this, ItemsCount);
ItemsCount = -1;
data->StepNo = data->Ranges.Size;
// Restore temporary buffer and fix back pointers which may be invalidated when nesting
IM_ASSERT(g.ClipperTempDataStacked > 0);
data = (--g.ClipperTempDataStacked > 0) ? &g.ClipperTempData[g.ClipperTempDataStacked - 1] : NULL;
if (data)
data->ListClipper->TempData = data;
if (ImGuiListClipperData* data = (ImGuiListClipperData*)TempData)
{
IM_ASSERT(data->ListClipper == this);
data->StepNo = data->Ranges.Size;
if (--g.ClipperTempDataStacked > 0)
{
data = &g.ClipperTempData[g.ClipperTempDataStacked - 1];
data->ListClipper->TempData = data;
}
TempData = NULL;
}
}
bool ImGuiListClipper::Step()