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Added ImGuiListClipper helper to avoid using CalcListClipping() directly.

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This commit is contained in:
ocornut
2015-05-31 12:33:24 +01:00
parent 446d8abfb0
commit eb4ffd5dbd
2 changed files with 35 additions and 3 deletions
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3
imgui.cpp
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@ -2730,6 +2730,7 @@ ImVec2 ImGui::CalcTextSize(const char* text, const char* text_end, bool hide_tex
}
// Helper to calculate coarse clipping of large list of evenly sized items.
// NB: Prefer using the ImGuiListClipper higher-level helper if you can!
// If you are displaying thousands of items and you have a random access to the list, you can perform clipping yourself to save on CPU.
// {
// float item_height = ImGui::GetTextLineHeightWithSpacing();
@ -2744,7 +2745,6 @@ void ImGui::CalcListClipping(int items_count, float items_height, int* out_items
{
ImGuiState& g = *GImGui;
ImGuiWindow* window = GetCurrentWindow();
if (g.LogEnabled)
{
// If logging is active, do not perform any clipping
@ -2762,7 +2762,6 @@ void ImGui::CalcListClipping(int items_count, float items_height, int* out_items
int end = (int)((clip_y2 - pos.y) / items_height);
start = ImClamp(start, 0, items_count);
end = ImClamp(end + 1, start, items_count);
*out_items_display_start = start;
*out_items_display_end = end;
}