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Menus: Adjusted BeginMenu() closing logic so hovering void or non-MenuItem() in parent window always lead to menu closure.

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ocornut
2022-03-28 11:14:07 +02:00
parent 2d76b09d2e
commit 0dec430707
3 changed files with 13 additions and 6 deletions
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14
imgui_widgets.cpp
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@ -6935,7 +6935,7 @@ bool ImGui::BeginMenuEx(const char* label, const char* icon, bool enabled)
{
// Close menu when not hovering it anymore unless we are moving roughly in the direction of the menu
// Implement http://bjk5.com/post/44698559168/breaking-down-amazons-mega-dropdown to avoid using timers, so menus feels more reactive.
bool moving_toward_other_child_menu = false;
bool moving_toward_child_menu = false;
ImGuiWindow* child_menu_window = (g.BeginPopupStack.Size < g.OpenPopupStack.Size && g.OpenPopupStack[g.BeginPopupStack.Size].SourceWindow == window) ? g.OpenPopupStack[g.BeginPopupStack.Size].Window : NULL;
if (g.HoveredWindow == window && child_menu_window != NULL && !(window->Flags & ImGuiWindowFlags_MenuBar))
{
@ -6946,18 +6946,22 @@ bool ImGui::BeginMenuEx(const char* label, const char* icon, bool enabled)
ImVec2 tc = (window->Pos.x < child_menu_window->Pos.x) ? next_window_rect.GetBL() : next_window_rect.GetBR();
float extra = ImClamp(ImFabs(ta.x - tb.x) * 0.30f, ref_unit * 0.5f, ref_unit * 2.5f); // add a bit of extra slack.
ta.x += (window->Pos.x < child_menu_window->Pos.x) ? -0.5f : +0.5f; // to avoid numerical issues (FIXME: ??)
tb.y = ta.y + ImMax((tb.y - extra) - ta.y, -ref_unit * 8.0f); // triangle is maximum 200 high to limit the slope and the bias toward large sub-menus // FIXME: Multiply by fb_scale?
tb.y = ta.y + ImMax((tb.y - extra) - ta.y, -ref_unit * 8.0f); // triangle has maximum height to limit the slope and the bias toward large sub-menus
tc.y = ta.y + ImMin((tc.y + extra) - ta.y, +ref_unit * 8.0f);
moving_toward_other_child_menu = ImTriangleContainsPoint(ta, tb, tc, g.IO.MousePos);
moving_toward_child_menu = ImTriangleContainsPoint(ta, tb, tc, g.IO.MousePos);
//GetForegroundDrawList()->AddTriangleFilled(ta, tb, tc, moving_toward_other_child_menu ? IM_COL32(0,128,0,128) : IM_COL32(128,0,0,128)); // [DEBUG]
}
if (menu_is_open && !hovered && g.HoveredWindow == window && g.HoveredIdPreviousFrame != 0 && g.HoveredIdPreviousFrame != id && !moving_toward_other_child_menu)
// The 'HovereWindow == window' check creates an inconsistency (e.g. moving away from menu slowly tends to hit same window, whereas moving away fast does not)
// But we also need to not close the top-menu menu when moving over void. Perhaps we should extend the triangle check to a larger polygon.
// (Remember to test this on BeginPopup("A")->BeginMenu("B") sequence which behaves slightly differently as B isn't a Child of A and hovering isn't shared.)
if (menu_is_open && !hovered && g.HoveredWindow == window && !moving_toward_child_menu)
want_close = true;
// Open
if (!menu_is_open && pressed) // Click/activate to open
want_open = true;
else if (!menu_is_open && hovered && !moving_toward_other_child_menu) // Hover to open
else if (!menu_is_open && hovered && !moving_toward_child_menu) // Hover to open
want_open = true;
if (g.NavId == id && g.NavMoveDir == ImGuiDir_Right) // Nav-Right to open
{