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Refactor: moving ItemAdd() into a section abote ItemSize(). No logic change (part 2)

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Diff not ideal (in Fork it looks like ItemSize is moved) but understandable at a glance.
This commit is contained in:
ocornut 2024-01-17 17:34:28 +01:00
parent ff5f3aa38b
commit 3b828d3701
1 changed files with 72 additions and 87 deletions
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159
imgui.cpp
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@ -9735,97 +9735,10 @@ void ImGui::KeepAliveID(ImGuiID id)
g.ActiveIdPreviousFrameIsAlive = true; g.ActiveIdPreviousFrameIsAlive = true;
} }
/*
// Declare item bounding box for clipping and interaction. // Declare item bounding box for clipping and interaction.
// Note that the size can be different than the one provided to ItemSize(). Typically, widgets that spread over available surface // Note that the size can be different than the one provided to ItemSize(). Typically, widgets that spread over available surface
// declare their minimum size requirement to ItemSize() and provide a larger region to ItemAdd() which is used drawing/interaction. // declare their minimum size requirement to ItemSize() and provide a larger region to ItemAdd() which is used drawing/interaction.
// THIS IS IN THE PERFORMANCE CRITICAL PATH (UNTIL THE CLIPPING TEST AND EARLY-RETURN) // THIS IS IN THE PERFORMANCE CRITICAL PATH (UNTIL THE CLIPPING TEST AND EARLY-RETURN)
bool ImGui::ItemAdd(const ImRect& bb, ImGuiID id, const ImRect* nav_bb_arg, ImGuiItemFlags extra_flags)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
...
return true;
}
*/
//-----------------------------------------------------------------------------
// [SECTION] LAYOUT
//-----------------------------------------------------------------------------
// - ItemSize()
// - SameLine()
// - GetCursorScreenPos()
// - SetCursorScreenPos()
// - GetCursorPos(), GetCursorPosX(), GetCursorPosY()
// - SetCursorPos(), SetCursorPosX(), SetCursorPosY()
// - GetCursorStartPos()
// - Indent()
// - Unindent()
// - SetNextItemWidth()
// - PushItemWidth()
// - PushMultiItemsWidths()
// - PopItemWidth()
// - CalcItemWidth()
// - CalcItemSize()
// - GetTextLineHeight()
// - GetTextLineHeightWithSpacing()
// - GetFrameHeight()
// - GetFrameHeightWithSpacing()
// - GetContentRegionMax()
// - GetContentRegionMaxAbs() [Internal]
// - GetContentRegionAvail(),
// - GetWindowContentRegionMin(), GetWindowContentRegionMax()
// - BeginGroup()
// - EndGroup()
// Also see in imgui_widgets: tab bars, and in imgui_tables: tables, columns.
//-----------------------------------------------------------------------------
// Advance cursor given item size for layout.
// Register minimum needed size so it can extend the bounding box used for auto-fit calculation.
// See comments in ItemAdd() about how/why the size provided to ItemSize() vs ItemAdd() may often different.
// THIS IS IN THE PERFORMANCE CRITICAL PATH.
void ImGui::ItemSize(const ImVec2& size, float text_baseline_y)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
if (window->SkipItems)
return;
// We increase the height in this function to accommodate for baseline offset.
// In theory we should be offsetting the starting position (window->DC.CursorPos), that will be the topic of a larger refactor,
// but since ItemSize() is not yet an API that moves the cursor (to handle e.g. wrapping) enlarging the height has the same effect.
const float offset_to_match_baseline_y = (text_baseline_y >= 0) ? ImMax(0.0f, window->DC.CurrLineTextBaseOffset - text_baseline_y) : 0.0f;
const float line_y1 = window->DC.IsSameLine ? window->DC.CursorPosPrevLine.y : window->DC.CursorPos.y;
const float line_height = ImMax(window->DC.CurrLineSize.y, /*ImMax(*/window->DC.CursorPos.y - line_y1/*, 0.0f)*/ + size.y + offset_to_match_baseline_y);
// Always align ourselves on pixel boundaries
//if (g.IO.KeyAlt) window->DrawList->AddRect(window->DC.CursorPos, window->DC.CursorPos + ImVec2(size.x, line_height), IM_COL32(255,0,0,200)); // [DEBUG]
window->DC.CursorPosPrevLine.x = window->DC.CursorPos.x + size.x;
window->DC.CursorPosPrevLine.y = line_y1;
window->DC.CursorPos.x = IM_TRUNC(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x); // Next line
window->DC.CursorPos.y = IM_TRUNC(line_y1 + line_height + g.Style.ItemSpacing.y); // Next line
window->DC.CursorMaxPos.x = ImMax(window->DC.CursorMaxPos.x, window->DC.CursorPosPrevLine.x);
window->DC.CursorMaxPos.y = ImMax(window->DC.CursorMaxPos.y, window->DC.CursorPos.y - g.Style.ItemSpacing.y);
//if (g.IO.KeyAlt) window->DrawList->AddCircle(window->DC.CursorMaxPos, 3.0f, IM_COL32(255,0,0,255), 4); // [DEBUG]
window->DC.PrevLineSize.y = line_height;
window->DC.CurrLineSize.y = 0.0f;
window->DC.PrevLineTextBaseOffset = ImMax(window->DC.CurrLineTextBaseOffset, text_baseline_y);
window->DC.CurrLineTextBaseOffset = 0.0f;
window->DC.IsSameLine = window->DC.IsSetPos = false;
// Horizontal layout mode
if (window->DC.LayoutType == ImGuiLayoutType_Horizontal)
SameLine();
}
bool ImGui::ItemAdd(const ImRect& bb, ImGuiID id, const ImRect* nav_bb_arg, ImGuiItemFlags extra_flags) bool ImGui::ItemAdd(const ImRect& bb, ImGuiID id, const ImRect* nav_bb_arg, ImGuiItemFlags extra_flags)
{ {
ImGuiContext& g = *GImGui; ImGuiContext& g = *GImGui;
@ -9910,6 +9823,78 @@ bool ImGui::ItemAdd(const ImRect& bb, ImGuiID id, const ImRect* nav_bb_arg, ImGu
return true; return true;
} }
//-----------------------------------------------------------------------------
// [SECTION] LAYOUT
//-----------------------------------------------------------------------------
// - ItemSize()
// - SameLine()
// - GetCursorScreenPos()
// - SetCursorScreenPos()
// - GetCursorPos(), GetCursorPosX(), GetCursorPosY()
// - SetCursorPos(), SetCursorPosX(), SetCursorPosY()
// - GetCursorStartPos()
// - Indent()
// - Unindent()
// - SetNextItemWidth()
// - PushItemWidth()
// - PushMultiItemsWidths()
// - PopItemWidth()
// - CalcItemWidth()
// - CalcItemSize()
// - GetTextLineHeight()
// - GetTextLineHeightWithSpacing()
// - GetFrameHeight()
// - GetFrameHeightWithSpacing()
// - GetContentRegionMax()
// - GetContentRegionMaxAbs() [Internal]
// - GetContentRegionAvail(),
// - GetWindowContentRegionMin(), GetWindowContentRegionMax()
// - BeginGroup()
// - EndGroup()
// Also see in imgui_widgets: tab bars, and in imgui_tables: tables, columns.
//-----------------------------------------------------------------------------
// Advance cursor given item size for layout.
// Register minimum needed size so it can extend the bounding box used for auto-fit calculation.
// See comments in ItemAdd() about how/why the size provided to ItemSize() vs ItemAdd() may often different.
// THIS IS IN THE PERFORMANCE CRITICAL PATH.
void ImGui::ItemSize(const ImVec2& size, float text_baseline_y)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
if (window->SkipItems)
return;
// We increase the height in this function to accommodate for baseline offset.
// In theory we should be offsetting the starting position (window->DC.CursorPos), that will be the topic of a larger refactor,
// but since ItemSize() is not yet an API that moves the cursor (to handle e.g. wrapping) enlarging the height has the same effect.
const float offset_to_match_baseline_y = (text_baseline_y >= 0) ? ImMax(0.0f, window->DC.CurrLineTextBaseOffset - text_baseline_y) : 0.0f;
const float line_y1 = window->DC.IsSameLine ? window->DC.CursorPosPrevLine.y : window->DC.CursorPos.y;
const float line_height = ImMax(window->DC.CurrLineSize.y, /*ImMax(*/window->DC.CursorPos.y - line_y1/*, 0.0f)*/ + size.y + offset_to_match_baseline_y);
// Always align ourselves on pixel boundaries
//if (g.IO.KeyAlt) window->DrawList->AddRect(window->DC.CursorPos, window->DC.CursorPos + ImVec2(size.x, line_height), IM_COL32(255,0,0,200)); // [DEBUG]
window->DC.CursorPosPrevLine.x = window->DC.CursorPos.x + size.x;
window->DC.CursorPosPrevLine.y = line_y1;
window->DC.CursorPos.x = IM_TRUNC(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x); // Next line
window->DC.CursorPos.y = IM_TRUNC(line_y1 + line_height + g.Style.ItemSpacing.y); // Next line
window->DC.CursorMaxPos.x = ImMax(window->DC.CursorMaxPos.x, window->DC.CursorPosPrevLine.x);
window->DC.CursorMaxPos.y = ImMax(window->DC.CursorMaxPos.y, window->DC.CursorPos.y - g.Style.ItemSpacing.y);
//if (g.IO.KeyAlt) window->DrawList->AddCircle(window->DC.CursorMaxPos, 3.0f, IM_COL32(255,0,0,255), 4); // [DEBUG]
window->DC.PrevLineSize.y = line_height;
window->DC.CurrLineSize.y = 0.0f;
window->DC.PrevLineTextBaseOffset = ImMax(window->DC.CurrLineTextBaseOffset, text_baseline_y);
window->DC.CurrLineTextBaseOffset = 0.0f;
window->DC.IsSameLine = window->DC.IsSetPos = false;
// Horizontal layout mode
if (window->DC.LayoutType == ImGuiLayoutType_Horizontal)
SameLine();
}
// Gets back to previous line and continue with horizontal layout // Gets back to previous line and continue with horizontal layout
// offset_from_start_x == 0 : follow right after previous item // offset_from_start_x == 0 : follow right after previous item
// offset_from_start_x != 0 : align to specified x position (relative to window/group left) // offset_from_start_x != 0 : align to specified x position (relative to window/group left)