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Tidying up internal FindBestPopupWindowPos()

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ocornut 2016-01-23 15:13:55 +00:00
parent 94dc3df956
commit 9f6b1ace8f
1 changed files with 9 additions and 11 deletions
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20
imgui.cpp
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@ -612,7 +612,7 @@ static void ClosePopupToLevel(int remaining);
static void ClosePopup(ImGuiID id);
static bool IsPopupOpen(ImGuiID id);
static ImGuiWindow* GetFrontMostModalRootWindow();
static ImVec2 FindBestPopupWindowPos(const ImVec2& base_pos, const ImVec2& size, ImGuiWindowFlags flags, int* last_dir, const ImRect& r_inner);
static ImVec2 FindBestPopupWindowPos(const ImVec2& base_pos, const ImVec2& size, int* last_dir, const ImRect& rect_to_avoid);
static bool InputTextFilterCharacter(unsigned int* p_char, ImGuiInputTextFlags flags, ImGuiTextEditCallback callback, void* user_data);
static int InputTextCalcTextLenAndLineCount(const char* text_begin, const char** out_text_end);
@ -3415,7 +3415,7 @@ static void CheckStacksSize(ImGuiWindow* window, bool write)
IM_ASSERT(p_backup == window->DC.StackSizesBackup + IM_ARRAYSIZE(window->DC.StackSizesBackup));
}
static ImVec2 FindBestPopupWindowPos(const ImVec2& base_pos, const ImVec2& size, ImGuiWindowFlags flags, int* last_dir, const ImRect& r_inner)
static ImVec2 FindBestPopupWindowPos(const ImVec2& base_pos, const ImVec2& size, int* last_dir, const ImRect& r_inner)
{
const ImGuiStyle& style = GImGui->Style;
@ -3425,7 +3425,7 @@ static ImVec2 FindBestPopupWindowPos(const ImVec2& base_pos, const ImVec2& size,
r_outer.Reduce(ImVec2((size.x - r_outer.GetWidth() > safe_padding.x*2) ? safe_padding.x : 0.0f, (size.y - r_outer.GetHeight() > safe_padding.y*2) ? safe_padding.y : 0.0f));
ImVec2 base_pos_clamped = ImClamp(base_pos, r_outer.Min, r_outer.Max - size);
for (int n = (*last_dir != -1) ? -1 : 0; n < 4; n++) // Right, down, up, left. Favor last used direction.
for (int n = (*last_dir != -1) ? -1 : 0; n < 4; n++) // Last, Right, down, up, left. (Favor last used direction).
{
const int dir = (n == -1) ? *last_dir : n;
ImRect rect(dir == 0 ? r_inner.Max.x : r_outer.Min.x, dir == 1 ? r_inner.Max.y : r_outer.Min.y, dir == 3 ? r_inner.Min.x : r_outer.Max.x, dir == 2 ? r_inner.Min.y : r_outer.Max.y);
@ -3435,12 +3435,8 @@ static ImVec2 FindBestPopupWindowPos(const ImVec2& base_pos, const ImVec2& size,
return ImVec2(dir == 0 ? r_inner.Max.x : dir == 3 ? r_inner.Min.x - size.x : base_pos_clamped.x, dir == 1 ? r_inner.Max.y : dir == 2 ? r_inner.Min.y - size.y : base_pos_clamped.y);
}
// Fallback
// Fallback, try to keep within display
*last_dir = -1;
if (flags & ImGuiWindowFlags_Tooltip) // For tooltip we prefer avoiding the cursor at all cost even if it means that part of the tooltip won't be visible.
return base_pos + ImVec2(2,2);
// Otherwise try to keep within display
ImVec2 pos = base_pos;
pos.x = ImMax(ImMin(pos.x + size.x, r_outer.Max.x) - size.x, r_outer.Min.x);
pos.y = ImMax(ImMin(pos.y + size.y, r_outer.Max.y) - size.y, r_outer.Min.y);
@ -3804,19 +3800,21 @@ bool ImGui::Begin(const char* name, bool* p_opened, const ImVec2& size_on_first_
rect_to_avoid = ImRect(-FLT_MAX, parent_window->Pos.y + parent_window->TitleBarHeight(), FLT_MAX, parent_window->Pos.y + parent_window->TitleBarHeight() + parent_window->MenuBarHeight());
else
rect_to_avoid = ImRect(parent_window->Pos.x + style.ItemSpacing.x, -FLT_MAX, parent_window->Pos.x + parent_window->Size.x - style.ItemSpacing.x - parent_window->ScrollbarSizes.x, FLT_MAX); // We want some overlap to convey the relative depth of each popup (here hard-coded to 4)
window->PosFloat = FindBestPopupWindowPos(window->PosFloat, window->Size, flags, &window->AutoPosLastDirection, rect_to_avoid);
window->PosFloat = FindBestPopupWindowPos(window->PosFloat, window->Size, &window->AutoPosLastDirection, rect_to_avoid);
}
else if ((flags & ImGuiWindowFlags_Popup) != 0 && !window_pos_set_by_api && window_appearing_after_being_hidden)
{
ImRect rect_to_avoid(window->PosFloat.x - 1, window->PosFloat.y - 1, window->PosFloat.x + 1, window->PosFloat.y + 1);
window->PosFloat = FindBestPopupWindowPos(window->PosFloat, window->Size, flags, &window->AutoPosLastDirection, rect_to_avoid);
window->PosFloat = FindBestPopupWindowPos(window->PosFloat, window->Size, &window->AutoPosLastDirection, rect_to_avoid);
}
// Position tooltip (always follows mouse)
if ((flags & ImGuiWindowFlags_Tooltip) != 0 && !window_pos_set_by_api)
{
ImRect rect_to_avoid(g.IO.MousePos.x - 16, g.IO.MousePos.y - 8, g.IO.MousePos.x + 24, g.IO.MousePos.y + 24); // FIXME: Completely hard-coded. Perhaps center on cursor hit-point instead?
window->PosFloat = FindBestPopupWindowPos(g.IO.MousePos, window->Size, flags, &window->AutoPosLastDirection, rect_to_avoid);
window->PosFloat = FindBestPopupWindowPos(g.IO.MousePos, window->Size, &window->AutoPosLastDirection, rect_to_avoid);
if (window->AutoPosLastDirection == -1)
window->PosFloat = g.IO.MousePos + 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.
}
// User moving window (at the beginning of the frame to avoid input lag or sheering). Only valid for root windows.