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Combo: display popup above if there's isn't enough space below / or select largest side (#505)

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ocornut 2016-03-25 23:36:43 +01:00
parent 7c9fa59329
commit d6750c87c2
1 changed files with 9 additions and 2 deletions
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11
imgui.cpp
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@ -8093,8 +8093,15 @@ bool ImGui::Combo(const char* label, int* current_item, bool (*items_getter)(voi
height_in_items = 7;
float popup_height = (label_size.y + style.ItemSpacing.y) * ImMin(items_count, height_in_items) + (style.FramePadding.y * 3);
ImRect popup_rect(ImVec2(frame_bb.Min.x, frame_bb.Max.y), ImVec2(frame_bb.Max.x, frame_bb.Max.y + popup_height));
popup_rect.Max.y = ImMin(popup_rect.Max.y, g.IO.DisplaySize.y - style.DisplaySafeAreaPadding.y); // Adhoc height limit for Combo. Ideally should be handled in Begin() along with other popups size, we want to have the possibility of moving the popup above as well.
float popup_y1 = frame_bb.Max.y;
float popup_y2 = ImClamp(popup_y1 + popup_height, popup_y1, g.IO.DisplaySize.y - style.DisplaySafeAreaPadding.y);
if ((popup_y2 - popup_y1) < ImMin(popup_height, frame_bb.Min.y - style.DisplaySafeAreaPadding.y))
{
// Position our combo ABOVE because there's more space to fit! (FIXME: Handle in Begin() or use a shared helper. We have similar code in Begin() for popup placement)
popup_y1 = ImClamp(frame_bb.Min.y - popup_height, style.DisplaySafeAreaPadding.y, frame_bb.Min.y);
popup_y2 = frame_bb.Min.y;
}
ImRect popup_rect(ImVec2(frame_bb.Min.x, popup_y1), ImVec2(frame_bb.Max.x, popup_y2));
ImGui::SetNextWindowPos(popup_rect.Min);
ImGui::SetNextWindowSize(popup_rect.GetSize());
ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, style.FramePadding);