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Internals: made ScrollbarEx() use ImS64 to facilitate use with larger ranges (not fully tested) + clipper tweaks (#3609, #3962 + https://github.com/ocornut/imgui_club/issues/20)

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This does NOT fix all problems with large ranges and floating point precision, it merely attenuate them.
This commit is contained in:
ocornut
2021-12-06 12:00:16 +01:00
parent eea836135a
commit 6e141a9cae
4 changed files with 20 additions and 14 deletions
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9
imgui.cpp
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@ -2348,8 +2348,9 @@ static void ImGuiListClipper_SeekCursorAndSetupPrevLine(float pos_y, float line_
static void ImGuiListClipper_SeekCursorForItem(ImGuiListClipper* clipper, int item_n)
{
// StartPosY starts from ItemsFrozen hence the subtraction
// Perform the add and multiply with double to allow seeking through larger ranges
ImGuiListClipperData* data = (ImGuiListClipperData*)clipper->TempData;
float pos_y = clipper->StartPosY + (item_n - data->ItemsFrozen) * clipper->ItemsHeight;
float pos_y = (float)((double)clipper->StartPosY + (double)(item_n - data->ItemsFrozen) * clipper->ItemsHeight);
ImGuiListClipper_SeekCursorAndSetupPrevLine(pos_y, clipper->ItemsHeight);
}
@ -2520,8 +2521,10 @@ bool ImGuiListClipper::Step()
for (int i = 0; i < data->Ranges.Size; i++)
if (data->Ranges[i].PosToIndexConvert)
{
data->Ranges[i].Min = ImClamp(already_submitted + (int)ImFloor((data->Ranges[i].Min - window->DC.CursorPos.y) / ItemsHeight) + data->Ranges[i].PosToIndexOffsetMin, already_submitted, ItemsCount - 1);
data->Ranges[i].Max = ImClamp(already_submitted + (int)ImCeil((data->Ranges[i].Max - window->DC.CursorPos.y) / ItemsHeight) + 0 + data->Ranges[i].PosToIndexOffsetMax, data->Ranges[i].Min + 1, ItemsCount);
int m1 = (int)(((double)data->Ranges[i].Min - window->DC.CursorPos.y) / ItemsHeight);
int m2 = (int)((((double)data->Ranges[i].Max - window->DC.CursorPos.y) / ItemsHeight) + 0.999999f);
data->Ranges[i].Min = ImClamp(already_submitted + m1 + data->Ranges[i].PosToIndexOffsetMin, already_submitted, ItemsCount - 1);
data->Ranges[i].Max = ImClamp(already_submitted + m2 + data->Ranges[i].PosToIndexOffsetMax, data->Ranges[i].Min + 1, ItemsCount);
data->Ranges[i].PosToIndexConvert = false;
}
ImGuiListClipper_SortAndFuseRanges(data->Ranges, data->StepNo);