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Docking: internals: extracted rounding corner calculation into reusable CalcRoundingFlagsForRectInRect() function.

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ocornut
2021-12-02 19:20:59 +01:00
parent 8733ca49b0
commit bf80204e63
3 changed files with 14 additions and 5 deletions
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11
imgui_draw.cpp
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@ -3926,6 +3926,17 @@ void ImGui::RenderRectFilledWithHole(ImDrawList* draw_list, ImRect outer, ImRect
if (fill_R && fill_D) draw_list->AddRectFilled(ImVec2(inner.Max.x, inner.Max.y), ImVec2(outer.Max.x, outer.Max.y), col, rounding, ImDrawFlags_RoundCornersBottomRight);
}
ImDrawFlags ImGui::CalcRoundingFlagsForRectInRect(const ImRect& r_in, const ImRect& r_outer, float threshold)
{
bool round_l = r_in.Min.x <= r_outer.Min.x + threshold;
bool round_r = r_in.Max.x >= r_outer.Max.x - threshold;
bool round_t = r_in.Min.y <= r_outer.Min.y + threshold;
bool round_b = r_in.Max.y >= r_outer.Max.y - threshold;
return ImDrawFlags_RoundCornersNone
| ((round_t && round_l) ? ImDrawFlags_RoundCornersTopLeft : 0) | ((round_t && round_r) ? ImDrawFlags_RoundCornersTopRight : 0)
| ((round_b && round_l) ? ImDrawFlags_RoundCornersBottomLeft : 0) | ((round_b && round_r) ? ImDrawFlags_RoundCornersBottomRight : 0);
}
// Helper for ColorPicker4()
// NB: This is rather brittle and will show artifact when rounding this enabled if rounded corners overlap multiple cells. Caller currently responsible for avoiding that.
// Spent a non reasonable amount of time trying to getting this right for ColorButton with rounding+anti-aliasing+ImGuiColorEditFlags_HalfAlphaPreview flag + various grid sizes and offsets, and eventually gave up... probably more reasonable to disable rounding altogether.