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Added BeginPopupContextItem() comment (#439)

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ocornut
2015-12-21 00:04:33 +01:00
parent 6102aa1375
commit 4723d97cfb
2 changed files with 13 additions and 8 deletions
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13
imgui.cpp
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@ -3207,7 +3207,7 @@ void ImGui::CloseCurrentPopup()
ClosePopupToLevel(popup_idx);
}
static void ClearSetNextWindowData()
static inline void ClearSetNextWindowData()
{
ImGuiState& g = *GImGui;
g.SetNextWindowPosCond = g.SetNextWindowSizeCond = g.SetNextWindowContentSizeCond = g.SetNextWindowCollapsedCond = g.SetNextWindowFocus = 0;
@ -3282,11 +3282,16 @@ void ImGui::EndPopup()
ImGui::PopStyleVar();
}
// FIXME: Allow to reopen existing, would need to a/ read DC.LastItemHoveredRect instead of DC.LastItemHoveredAndUsable and b/ add parameter to API (more tricky)
// This is a helper to handle the most simple case of associating one named popup to one given widget.
// 1. If you have many possible popups (for different "instances" of a same widget, or for wholly different widgets), you may be better off handling
// this yourself so you can store data relative to the widget that opened the popup instead of choosing different popup identifiers.
// 2. If you want right-clicking on the same item to reopen the popup at new location, use the same code replacing IsItemHovered() with IsItemHoveredRect().
// Because: hovering an item in a window below the popup won't normally trigger is hovering behavior/coloring. The pattern of ignoring the fact that
// the item isn't interactable (because it is blocked by the active popup) may useful in some situation when e.g. large canvas as one item, content of menu
// driven by click position.
bool ImGui::BeginPopupContextItem(const char* str_id, int mouse_button)
{
ImGuiWindow* window = GetCurrentWindowRead();
if (window->DC.LastItemHoveredAndUsable && ImGui::IsMouseClicked(mouse_button))
if (ImGui::IsItemHovered() && ImGui::IsMouseClicked(mouse_button))
ImGui::OpenPopupEx(str_id, false);
return ImGui::BeginPopup(str_id);
}