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Refactor: Internals: Moved Popup functions in imgui.cpp in their own section. (part 3) (#2036)
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omar
parent
064b949bc2
commit
fd2bfb7e07
212
imgui.cpp
212
imgui.cpp
@ -4167,112 +4167,6 @@ static void CheckStacksSize(ImGuiWindow* window, bool write)
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IM_ASSERT(p_backup == window->DC.StackSizesBackup + IM_ARRAYSIZE(window->DC.StackSizesBackup));
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}
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ImRect ImGui::GetWindowAllowedExtentRect(ImGuiWindow*)
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{
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ImVec2 padding = GImGui->Style.DisplaySafeAreaPadding;
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ImRect r_screen = GetViewportRect();
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r_screen.Expand(ImVec2((r_screen.GetWidth() > padding.x * 2) ? -padding.x : 0.0f, (r_screen.GetHeight() > padding.y * 2) ? -padding.y : 0.0f));
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return r_screen;
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}
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// r_avoid = the rectangle to avoid (e.g. for tooltip it is a rectangle around the mouse cursor which we want to avoid. for popups it's a small point around the cursor.)
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// r_outer = the visible area rectangle, minus safe area padding. If our popup size won't fit because of safe area padding we ignore it.
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ImVec2 ImGui::FindBestWindowPosForPopupEx(const ImVec2& ref_pos, const ImVec2& size, ImGuiDir* last_dir, const ImRect& r_outer, const ImRect& r_avoid, ImGuiPopupPositionPolicy policy)
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{
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ImVec2 base_pos_clamped = ImClamp(ref_pos, r_outer.Min, r_outer.Max - size);
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//GImGui->OverlayDrawList.AddRect(r_avoid.Min, r_avoid.Max, IM_COL32(255,0,0,255));
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//GImGui->OverlayDrawList.AddRect(r_outer.Min, r_outer.Max, IM_COL32(0,255,0,255));
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// Combo Box policy (we want a connecting edge)
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if (policy == ImGuiPopupPositionPolicy_ComboBox)
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{
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const ImGuiDir dir_prefered_order[ImGuiDir_COUNT] = { ImGuiDir_Down, ImGuiDir_Right, ImGuiDir_Left, ImGuiDir_Up };
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for (int n = (*last_dir != ImGuiDir_None) ? -1 : 0; n < ImGuiDir_COUNT; n++)
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{
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const ImGuiDir dir = (n == -1) ? *last_dir : dir_prefered_order[n];
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if (n != -1 && dir == *last_dir) // Already tried this direction?
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continue;
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ImVec2 pos;
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if (dir == ImGuiDir_Down) pos = ImVec2(r_avoid.Min.x, r_avoid.Max.y); // Below, Toward Right (default)
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if (dir == ImGuiDir_Right) pos = ImVec2(r_avoid.Min.x, r_avoid.Min.y - size.y); // Above, Toward Right
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if (dir == ImGuiDir_Left) pos = ImVec2(r_avoid.Max.x - size.x, r_avoid.Max.y); // Below, Toward Left
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if (dir == ImGuiDir_Up) pos = ImVec2(r_avoid.Max.x - size.x, r_avoid.Min.y - size.y); // Above, Toward Left
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if (!r_outer.Contains(ImRect(pos, pos + size)))
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continue;
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*last_dir = dir;
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return pos;
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}
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}
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// Default popup policy
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const ImGuiDir dir_prefered_order[ImGuiDir_COUNT] = { ImGuiDir_Right, ImGuiDir_Down, ImGuiDir_Up, ImGuiDir_Left };
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for (int n = (*last_dir != ImGuiDir_None) ? -1 : 0; n < ImGuiDir_COUNT; n++)
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{
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const ImGuiDir dir = (n == -1) ? *last_dir : dir_prefered_order[n];
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if (n != -1 && dir == *last_dir) // Already tried this direction?
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continue;
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float avail_w = (dir == ImGuiDir_Left ? r_avoid.Min.x : r_outer.Max.x) - (dir == ImGuiDir_Right ? r_avoid.Max.x : r_outer.Min.x);
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float avail_h = (dir == ImGuiDir_Up ? r_avoid.Min.y : r_outer.Max.y) - (dir == ImGuiDir_Down ? r_avoid.Max.y : r_outer.Min.y);
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if (avail_w < size.x || avail_h < size.y)
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continue;
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ImVec2 pos;
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pos.x = (dir == ImGuiDir_Left) ? r_avoid.Min.x - size.x : (dir == ImGuiDir_Right) ? r_avoid.Max.x : base_pos_clamped.x;
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pos.y = (dir == ImGuiDir_Up) ? r_avoid.Min.y - size.y : (dir == ImGuiDir_Down) ? r_avoid.Max.y : base_pos_clamped.y;
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*last_dir = dir;
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return pos;
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}
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// Fallback, try to keep within display
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*last_dir = ImGuiDir_None;
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ImVec2 pos = ref_pos;
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pos.x = ImMax(ImMin(pos.x + size.x, r_outer.Max.x) - size.x, r_outer.Min.x);
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pos.y = ImMax(ImMin(pos.y + size.y, r_outer.Max.y) - size.y, r_outer.Min.y);
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return pos;
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}
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ImVec2 ImGui::FindBestWindowPosForPopup(ImGuiWindow* window)
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{
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ImGuiContext& g = *GImGui;
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ImRect r_outer = GetWindowAllowedExtentRect(window);
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if (window->Flags & ImGuiWindowFlags_ChildMenu)
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{
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// Child menus typically request _any_ position within the parent menu item, and then our FindBestWindowPosForPopup() function will move the new menu outside the parent bounds.
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// This is how we end up with child menus appearing (most-commonly) on the right of the parent menu.
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IM_ASSERT(g.CurrentWindow == window);
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ImGuiWindow* parent_window = g.CurrentWindowStack[g.CurrentWindowStack.Size - 2];
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float horizontal_overlap = g.Style.ItemSpacing.x; // We want some overlap to convey the relative depth of each menu (currently the amount of overlap is hard-coded to style.ItemSpacing.x).
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ImRect r_avoid;
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if (parent_window->DC.MenuBarAppending)
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r_avoid = ImRect(-FLT_MAX, parent_window->Pos.y + parent_window->TitleBarHeight(), FLT_MAX, parent_window->Pos.y + parent_window->TitleBarHeight() + parent_window->MenuBarHeight());
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else
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r_avoid = ImRect(parent_window->Pos.x + horizontal_overlap, -FLT_MAX, parent_window->Pos.x + parent_window->Size.x - horizontal_overlap - parent_window->ScrollbarSizes.x, FLT_MAX);
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return FindBestWindowPosForPopupEx(window->Pos, window->Size, &window->AutoPosLastDirection, r_outer, r_avoid);
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}
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if (window->Flags & ImGuiWindowFlags_Popup)
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{
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ImRect r_avoid = ImRect(window->Pos.x - 1, window->Pos.y - 1, window->Pos.x + 1, window->Pos.y + 1);
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return FindBestWindowPosForPopupEx(window->Pos, window->Size, &window->AutoPosLastDirection, r_outer, r_avoid);
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}
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if (window->Flags & ImGuiWindowFlags_Tooltip)
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{
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// Position tooltip (always follows mouse)
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float sc = g.Style.MouseCursorScale;
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ImVec2 ref_pos = NavCalcPreferredRefPos();
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ImRect r_avoid;
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if (!g.NavDisableHighlight && g.NavDisableMouseHover && !(g.IO.ConfigFlags & ImGuiConfigFlags_NavEnableSetMousePos))
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r_avoid = ImRect(ref_pos.x - 16, ref_pos.y - 8, ref_pos.x + 16, ref_pos.y + 8);
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else
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r_avoid = ImRect(ref_pos.x - 16, ref_pos.y - 8, ref_pos.x + 24 * sc, ref_pos.y + 24 * sc); // FIXME: Hard-coded based on mouse cursor shape expectation. Exact dimension not very important.
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ImVec2 pos = FindBestWindowPosForPopupEx(ref_pos, window->Size, &window->AutoPosLastDirection, r_outer, r_avoid);
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if (window->AutoPosLastDirection == ImGuiDir_None)
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pos = ref_pos + ImVec2(2, 2); // If there's not enough room, for tooltip we prefer avoiding the cursor at all cost even if it means that part of the tooltip won't be visible.
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return pos;
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}
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IM_ASSERT(0);
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return window->Pos;
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}
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static void SetWindowConditionAllowFlags(ImGuiWindow* window, ImGuiCond flags, bool enabled)
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{
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window->SetWindowPosAllowFlags = enabled ? (window->SetWindowPosAllowFlags | flags) : (window->SetWindowPosAllowFlags & ~flags);
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@ -6766,6 +6660,112 @@ bool ImGui::BeginPopupContextVoid(const char* str_id, int mouse_button)
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return BeginPopupEx(id, ImGuiWindowFlags_AlwaysAutoResize|ImGuiWindowFlags_NoTitleBar|ImGuiWindowFlags_NoSavedSettings);
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}
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ImRect ImGui::GetWindowAllowedExtentRect(ImGuiWindow*)
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{
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ImVec2 padding = GImGui->Style.DisplaySafeAreaPadding;
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ImRect r_screen = GetViewportRect();
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r_screen.Expand(ImVec2((r_screen.GetWidth() > padding.x * 2) ? -padding.x : 0.0f, (r_screen.GetHeight() > padding.y * 2) ? -padding.y : 0.0f));
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return r_screen;
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}
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// r_avoid = the rectangle to avoid (e.g. for tooltip it is a rectangle around the mouse cursor which we want to avoid. for popups it's a small point around the cursor.)
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// r_outer = the visible area rectangle, minus safe area padding. If our popup size won't fit because of safe area padding we ignore it.
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ImVec2 ImGui::FindBestWindowPosForPopupEx(const ImVec2& ref_pos, const ImVec2& size, ImGuiDir* last_dir, const ImRect& r_outer, const ImRect& r_avoid, ImGuiPopupPositionPolicy policy)
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{
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ImVec2 base_pos_clamped = ImClamp(ref_pos, r_outer.Min, r_outer.Max - size);
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//GImGui->OverlayDrawList.AddRect(r_avoid.Min, r_avoid.Max, IM_COL32(255,0,0,255));
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//GImGui->OverlayDrawList.AddRect(r_outer.Min, r_outer.Max, IM_COL32(0,255,0,255));
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// Combo Box policy (we want a connecting edge)
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if (policy == ImGuiPopupPositionPolicy_ComboBox)
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{
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const ImGuiDir dir_prefered_order[ImGuiDir_COUNT] = { ImGuiDir_Down, ImGuiDir_Right, ImGuiDir_Left, ImGuiDir_Up };
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for (int n = (*last_dir != ImGuiDir_None) ? -1 : 0; n < ImGuiDir_COUNT; n++)
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{
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const ImGuiDir dir = (n == -1) ? *last_dir : dir_prefered_order[n];
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if (n != -1 && dir == *last_dir) // Already tried this direction?
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continue;
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ImVec2 pos;
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if (dir == ImGuiDir_Down) pos = ImVec2(r_avoid.Min.x, r_avoid.Max.y); // Below, Toward Right (default)
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if (dir == ImGuiDir_Right) pos = ImVec2(r_avoid.Min.x, r_avoid.Min.y - size.y); // Above, Toward Right
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if (dir == ImGuiDir_Left) pos = ImVec2(r_avoid.Max.x - size.x, r_avoid.Max.y); // Below, Toward Left
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if (dir == ImGuiDir_Up) pos = ImVec2(r_avoid.Max.x - size.x, r_avoid.Min.y - size.y); // Above, Toward Left
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if (!r_outer.Contains(ImRect(pos, pos + size)))
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continue;
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*last_dir = dir;
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return pos;
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}
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}
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// Default popup policy
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const ImGuiDir dir_prefered_order[ImGuiDir_COUNT] = { ImGuiDir_Right, ImGuiDir_Down, ImGuiDir_Up, ImGuiDir_Left };
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for (int n = (*last_dir != ImGuiDir_None) ? -1 : 0; n < ImGuiDir_COUNT; n++)
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{
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const ImGuiDir dir = (n == -1) ? *last_dir : dir_prefered_order[n];
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if (n != -1 && dir == *last_dir) // Already tried this direction?
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continue;
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float avail_w = (dir == ImGuiDir_Left ? r_avoid.Min.x : r_outer.Max.x) - (dir == ImGuiDir_Right ? r_avoid.Max.x : r_outer.Min.x);
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float avail_h = (dir == ImGuiDir_Up ? r_avoid.Min.y : r_outer.Max.y) - (dir == ImGuiDir_Down ? r_avoid.Max.y : r_outer.Min.y);
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if (avail_w < size.x || avail_h < size.y)
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continue;
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ImVec2 pos;
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pos.x = (dir == ImGuiDir_Left) ? r_avoid.Min.x - size.x : (dir == ImGuiDir_Right) ? r_avoid.Max.x : base_pos_clamped.x;
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pos.y = (dir == ImGuiDir_Up) ? r_avoid.Min.y - size.y : (dir == ImGuiDir_Down) ? r_avoid.Max.y : base_pos_clamped.y;
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*last_dir = dir;
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return pos;
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}
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// Fallback, try to keep within display
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*last_dir = ImGuiDir_None;
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ImVec2 pos = ref_pos;
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pos.x = ImMax(ImMin(pos.x + size.x, r_outer.Max.x) - size.x, r_outer.Min.x);
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pos.y = ImMax(ImMin(pos.y + size.y, r_outer.Max.y) - size.y, r_outer.Min.y);
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return pos;
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}
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ImVec2 ImGui::FindBestWindowPosForPopup(ImGuiWindow* window)
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{
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ImGuiContext& g = *GImGui;
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ImRect r_outer = GetWindowAllowedExtentRect(window);
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if (window->Flags & ImGuiWindowFlags_ChildMenu)
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{
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// Child menus typically request _any_ position within the parent menu item, and then our FindBestWindowPosForPopup() function will move the new menu outside the parent bounds.
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// This is how we end up with child menus appearing (most-commonly) on the right of the parent menu.
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IM_ASSERT(g.CurrentWindow == window);
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ImGuiWindow* parent_window = g.CurrentWindowStack[g.CurrentWindowStack.Size - 2];
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float horizontal_overlap = g.Style.ItemSpacing.x; // We want some overlap to convey the relative depth of each menu (currently the amount of overlap is hard-coded to style.ItemSpacing.x).
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ImRect r_avoid;
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if (parent_window->DC.MenuBarAppending)
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r_avoid = ImRect(-FLT_MAX, parent_window->Pos.y + parent_window->TitleBarHeight(), FLT_MAX, parent_window->Pos.y + parent_window->TitleBarHeight() + parent_window->MenuBarHeight());
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else
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r_avoid = ImRect(parent_window->Pos.x + horizontal_overlap, -FLT_MAX, parent_window->Pos.x + parent_window->Size.x - horizontal_overlap - parent_window->ScrollbarSizes.x, FLT_MAX);
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return FindBestWindowPosForPopupEx(window->Pos, window->Size, &window->AutoPosLastDirection, r_outer, r_avoid);
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}
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if (window->Flags & ImGuiWindowFlags_Popup)
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{
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ImRect r_avoid = ImRect(window->Pos.x - 1, window->Pos.y - 1, window->Pos.x + 1, window->Pos.y + 1);
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return FindBestWindowPosForPopupEx(window->Pos, window->Size, &window->AutoPosLastDirection, r_outer, r_avoid);
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}
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if (window->Flags & ImGuiWindowFlags_Tooltip)
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{
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// Position tooltip (always follows mouse)
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float sc = g.Style.MouseCursorScale;
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ImVec2 ref_pos = NavCalcPreferredRefPos();
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ImRect r_avoid;
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if (!g.NavDisableHighlight && g.NavDisableMouseHover && !(g.IO.ConfigFlags & ImGuiConfigFlags_NavEnableSetMousePos))
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r_avoid = ImRect(ref_pos.x - 16, ref_pos.y - 8, ref_pos.x + 16, ref_pos.y + 8);
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else
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r_avoid = ImRect(ref_pos.x - 16, ref_pos.y - 8, ref_pos.x + 24 * sc, ref_pos.y + 24 * sc); // FIXME: Hard-coded based on mouse cursor shape expectation. Exact dimension not very important.
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ImVec2 pos = FindBestWindowPosForPopupEx(ref_pos, window->Size, &window->AutoPosLastDirection, r_outer, r_avoid);
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if (window->AutoPosLastDirection == ImGuiDir_None)
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pos = ref_pos + ImVec2(2, 2); // If there's not enough room, for tooltip we prefer avoiding the cursor at all cost even if it means that part of the tooltip won't be visible.
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return pos;
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}
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IM_ASSERT(0);
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return window->Pos;
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}
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//-----------------------------------------------------------------------------
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// NAVIGATION
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//-----------------------------------------------------------------------------
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