From 9bd7846f0782deaeee6c0817d1f9cea102558061 Mon Sep 17 00:00:00 2001 From: omar Date: Wed, 31 Jul 2019 18:37:55 -0700 Subject: [PATCH] Internal: Made ScrollToBringRectIntoView() handle recursing back to scroll parent window, so the function can be called elsewhere (instead of 1 deep recursion done in NavUpdateMoveResult(). --- imgui.cpp | 48 +++++++++++++++++++++++++++--------------------- imgui_internal.h | 2 +- 2 files changed, 28 insertions(+), 22 deletions(-) diff --git a/imgui.cpp b/imgui.cpp index 6e6da3b1..4f55e4a9 100644 --- a/imgui.cpp +++ b/imgui.cpp @@ -7165,22 +7165,33 @@ static ImVec2 CalcNextScrollFromScrollTargetAndClamp(ImGuiWindow* window, bool s } // Scroll to keep newly navigated item fully into view -void ImGui::ScrollToBringRectIntoView(ImGuiWindow* window, const ImRect& item_rect) +ImVec2 ImGui::ScrollToBringRectIntoView(ImGuiWindow* window, const ImRect& item_rect) { + ImGuiContext& g = *GImGui; ImRect window_rect(window->InnerRect.Min - ImVec2(1, 1), window->InnerRect.Max + ImVec2(1, 1)); //GetForegroundDrawList(window)->AddRect(window_rect.Min, window_rect.Max, IM_COL32_WHITE); // [DEBUG] - if (window_rect.Contains(item_rect)) - return; - ImGuiContext& g = *GImGui; - if (window->ScrollbarX && item_rect.Min.x < window_rect.Min.x) - SetScrollFromPosX(window, item_rect.Min.x - window->Pos.x + g.Style.ItemSpacing.x, 0.0f); - else if (window->ScrollbarX && item_rect.Max.x >= window_rect.Max.x) - SetScrollFromPosX(window, item_rect.Max.x - window->Pos.x + g.Style.ItemSpacing.x, 1.0f); - if (item_rect.Min.y < window_rect.Min.y) - SetScrollFromPosY(window, item_rect.Min.y - window->Pos.y - g.Style.ItemSpacing.y, 0.0f); - else if (item_rect.Max.y >= window_rect.Max.y) - SetScrollFromPosY(window, item_rect.Max.y - window->Pos.y + g.Style.ItemSpacing.y, 1.0f); + ImVec2 delta_scroll; + if (!window_rect.Contains(item_rect)) + { + if (window->ScrollbarX && item_rect.Min.x < window_rect.Min.x) + SetScrollFromPosX(window, item_rect.Min.x - window->Pos.x + g.Style.ItemSpacing.x, 0.0f); + else if (window->ScrollbarX && item_rect.Max.x >= window_rect.Max.x) + SetScrollFromPosX(window, item_rect.Max.x - window->Pos.x + g.Style.ItemSpacing.x, 1.0f); + if (item_rect.Min.y < window_rect.Min.y) + SetScrollFromPosY(window, item_rect.Min.y - window->Pos.y - g.Style.ItemSpacing.y, 0.0f); + else if (item_rect.Max.y >= window_rect.Max.y) + SetScrollFromPosY(window, item_rect.Max.y - window->Pos.y + g.Style.ItemSpacing.y, 1.0f); + + ImVec2 next_scroll = CalcNextScrollFromScrollTargetAndClamp(window, false); + delta_scroll = next_scroll - window->Scroll; + } + + // Also scroll parent window to keep us into view if necessary + if (window->Flags & ImGuiWindowFlags_ChildWindow) + delta_scroll += ScrollToBringRectIntoView(window->ParentWindow, ImRect(item_rect.Min - delta_scroll, item_rect.Max - delta_scroll)); + + return delta_scroll; } float ImGui::GetScrollX() @@ -8484,16 +8495,11 @@ static void ImGui::NavUpdateMoveResult() if (g.NavLayer == 0) { ImRect rect_abs = ImRect(result->RectRel.Min + result->Window->Pos, result->RectRel.Max + result->Window->Pos); - ScrollToBringRectIntoView(result->Window, rect_abs); + ImVec2 delta_scroll = ScrollToBringRectIntoView(result->Window, rect_abs); - // Estimate upcoming scroll so we can offset our result position so mouse position can be applied immediately after in NavUpdate() - ImVec2 next_scroll = CalcNextScrollFromScrollTargetAndClamp(result->Window, false); - ImVec2 delta_scroll = result->Window->Scroll - next_scroll; - result->RectRel.Translate(delta_scroll); - - // Also scroll parent window to keep us into view if necessary (we could/should technically recurse back the whole the parent hierarchy). - if (result->Window->Flags & ImGuiWindowFlags_ChildWindow) - ScrollToBringRectIntoView(result->Window->ParentWindow, ImRect(rect_abs.Min + delta_scroll, rect_abs.Max + delta_scroll)); + // Offset our result position so mouse position can be applied immediately after in NavUpdate() + result->RectRel.TranslateX(-delta_scroll.x); + result->RectRel.TranslateY(-delta_scroll.y); } ClearActiveID(); diff --git a/imgui_internal.h b/imgui_internal.h index 77328281..4a038d12 100644 --- a/imgui_internal.h +++ b/imgui_internal.h @@ -1502,7 +1502,7 @@ namespace ImGui IMGUI_API void SetScrollY(ImGuiWindow* window, float new_scroll_y); IMGUI_API void SetScrollFromPosX(ImGuiWindow* window, float local_x, float center_x_ratio = 0.5f); IMGUI_API void SetScrollFromPosY(ImGuiWindow* window, float local_y, float center_y_ratio = 0.5f); - IMGUI_API void ScrollToBringRectIntoView(ImGuiWindow* window, const ImRect& item_rect); + IMGUI_API ImVec2 ScrollToBringRectIntoView(ImGuiWindow* window, const ImRect& item_rect); // Basic Accessors inline ImGuiID GetItemID() { ImGuiContext& g = *GImGui; return g.CurrentWindow->DC.LastItemId; }