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

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This commit is contained in:
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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7
imgui.cpp
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@ -14486,10 +14486,7 @@ static void ImGui::DockNodeUpdateTabBar(ImGuiDockNode* node, ImGuiWindow* host_w
if (is_focused)
node->LastFrameFocused = g.FrameCount;
ImU32 title_bar_col = GetColorU32(host_window->Collapsed ? ImGuiCol_TitleBgCollapsed : is_focused ? ImGuiCol_TitleBgActive : ImGuiCol_TitleBg);
bool rounding_t = node->Pos.y <= host_window->Pos.y + DOCKING_SPLITTER_SIZE;
bool rounding_tl = rounding_t && (node->Pos.x <= host_window->Pos.x + DOCKING_SPLITTER_SIZE);
bool rounding_tr = rounding_t && (node->Pos.x + node->Size.x >= host_window->Pos.x + host_window->Size.x - DOCKING_SPLITTER_SIZE);
ImDrawFlags rounding_flags = ImDrawFlags_RoundCornersNone | (rounding_tl ? ImDrawFlags_RoundCornersTopLeft : 0) | (rounding_tr ? ImDrawFlags_RoundCornersTopRight : 0);
ImDrawFlags rounding_flags = CalcRoundingFlagsForRectInRect(title_bar_rect, host_window->Rect(), DOCKING_SPLITTER_SIZE);
host_window->DrawList->AddRectFilled(title_bar_rect.Min, title_bar_rect.Max, title_bar_col, host_window->WindowRounding, rounding_flags);
// Docking/Collapse button
@ -14958,7 +14955,7 @@ static void ImGui::DockNodePreviewDockRender(ImGuiWindow* host_window, ImGuiDock
overlay_rect.Min.y += GetFrameHeight();
if (data->SplitDir != ImGuiDir_None || data->IsCenterAvailable)
for (int overlay_n = 0; overlay_n < overlay_draw_lists_count; overlay_n++)
overlay_draw_lists[overlay_n]->AddRectFilled(overlay_rect.Min, overlay_rect.Max, overlay_col_main, host_window->WindowRounding);
overlay_draw_lists[overlay_n]->AddRectFilled(overlay_rect.Min, overlay_rect.Max, overlay_col_main, host_window->WindowRounding, CalcRoundingFlagsForRectInRect(overlay_rect, host_window->Rect(), DOCKING_SPLITTER_SIZE));
}
// Display tab shape/label preview unless we are splitting node (it generally makes the situation harder to read)

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.

1
imgui_internal.h
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@ -2976,6 +2976,7 @@ namespace ImGui
IMGUI_API void RenderArrowDockMenu(ImDrawList* draw_list, ImVec2 p_min, float sz, ImU32 col);
IMGUI_API void RenderRectFilledRangeH(ImDrawList* draw_list, const ImRect& rect, ImU32 col, float x_start_norm, float x_end_norm, float rounding);
IMGUI_API void RenderRectFilledWithHole(ImDrawList* draw_list, ImRect outer, ImRect inner, ImU32 col, float rounding);
IMGUI_API ImDrawFlags CalcRoundingFlagsForRectInRect(const ImRect& r_in, const ImRect& r_outer, float threshold);
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
// [1.71: 2019/06/07: Updating prototypes of some of the internal functions. Leaving those for reference for a short while]