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Tables: Added ImGuiTableFlags_NoHostExtendX (#3605) marked as WIP, will probably rename.

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Moved some code from BeginTable() to TableUpdateLayout() to late latch some of the required data.
This commit is contained in:
ocornut
2020-12-17 22:29:11 +01:00
parent c4dbab8f5e
commit ad83976b35
4 changed files with 69 additions and 29 deletions
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23
imgui.h
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@@ -1075,20 +1075,21 @@ enum ImGuiTableFlags_
ImGuiTableFlags_ColumnsWidthFixed = 1 << 14, // Default if ScrollX is on. Columns will default to use _WidthFixed or _WidthAutoResize policy (if Resizable is off). Read description above for more details.
ImGuiTableFlags_SameWidths = 1 << 15, // Make all columns the same widths which is useful with Fixed columns policy (but granted by default with Stretch policy + no resize). Implicitly enable ImGuiTableFlags_NoKeepColumnsVisible and disable ImGuiTableFlags_Resizable.
ImGuiTableFlags_NoHeadersWidth = 1 << 16, // Disable headers' contribution to automatic width calculation.
ImGuiTableFlags_NoHostExtendY = 1 << 17, // Disable extending past the limit set by outer_size.y, only meaningful when neither of ScrollX|ScrollY are set (data below the limit will be clipped and not visible)
ImGuiTableFlags_NoKeepColumnsVisible = 1 << 18, // Disable keeping column always minimally visible when ScrollX is off and table gets too small.
ImGuiTableFlags_PreciseWidths = 1 << 19, // Disable distributing remainder width to stretched columns (width allocation on a 100-wide table with 3 columns: Without this flag: 33,33,34. With this flag: 33,33,33). With larger number of columns, resizing will appear to be less smooth.
ImGuiTableFlags_NoClip = 1 << 20, // Disable clipping rectangle for every individual columns (reduce draw command count, items will be able to overflow into other columns). Generally incompatible with TableSetupScrollFreeze().
ImGuiTableFlags_NoHostExtendX = 1 << 17, // Disable extending table past the limit required by the right-most columns. Only meaningful with Fixed columns and when neither ScrollX nor ScrollY are set.
ImGuiTableFlags_NoHostExtendY = 1 << 18, // Disable extending table past the limit set by outer_size.y. Only meaningful when neither ScrollX nor ScrollY are set (data below the limit will be clipped and not visible)
ImGuiTableFlags_NoKeepColumnsVisible = 1 << 19, // Disable keeping column always minimally visible when ScrollX is off and table gets too small.
ImGuiTableFlags_PreciseWidths = 1 << 20, // Disable distributing remainder width to stretched columns (width allocation on a 100-wide table with 3 columns: Without this flag: 33,33,34. With this flag: 33,33,33). With larger number of columns, resizing will appear to be less smooth.
ImGuiTableFlags_NoClip = 1 << 21, // Disable clipping rectangle for every individual columns (reduce draw command count, items will be able to overflow into other columns). Generally incompatible with TableSetupScrollFreeze().
// Padding
ImGuiTableFlags_PadOuterX = 1 << 21, // Default if BordersOuterV is on. Enable outer-most padding.
ImGuiTableFlags_NoPadOuterX = 1 << 22, // Default if BordersOuterV is off. Disable outer-most padding.
ImGuiTableFlags_NoPadInnerX = 1 << 23, // Disable inner padding between columns (double inner padding if BordersOuterV is on, single inner padding if BordersOuterV is off).
ImGuiTableFlags_PadOuterX = 1 << 22, // Default if BordersOuterV is on. Enable outer-most padding.
ImGuiTableFlags_NoPadOuterX = 1 << 23, // Default if BordersOuterV is off. Disable outer-most padding.
ImGuiTableFlags_NoPadInnerX = 1 << 24, // Disable inner padding between columns (double inner padding if BordersOuterV is on, single inner padding if BordersOuterV is off).
// Scrolling
ImGuiTableFlags_ScrollX = 1 << 24, // Enable horizontal scrolling. Require 'outer_size' parameter of BeginTable() to specify the container size. Changes default sizing policy. Because this create a child window, ScrollY is currently generally recommended when using ScrollX.
ImGuiTableFlags_ScrollY = 1 << 25, // Enable vertical scrolling. Require 'outer_size' parameter of BeginTable() to specify the container size.
ImGuiTableFlags_ScrollX = 1 << 25, // Enable horizontal scrolling. Require 'outer_size' parameter of BeginTable() to specify the container size. Changes default sizing policy. Because this create a child window, ScrollY is currently generally recommended when using ScrollX.
ImGuiTableFlags_ScrollY = 1 << 26, // Enable vertical scrolling. Require 'outer_size' parameter of BeginTable() to specify the container size.
// Sorting
ImGuiTableFlags_SortMulti = 1 << 26, // Hold shift when clicking headers to sort on multiple column. TableGetSortSpecs() may return specs where (SpecsCount > 1).
ImGuiTableFlags_SortTristate = 1 << 27 // Allow no sorting, disable default sorting. TableGetSortSpecs() may return specs where (SpecsCount == 0).
ImGuiTableFlags_SortMulti = 1 << 27, // Hold shift when clicking headers to sort on multiple column. TableGetSortSpecs() may return specs where (SpecsCount > 1).
ImGuiTableFlags_SortTristate = 1 << 28 // Allow no sorting, disable default sorting. TableGetSortSpecs() may return specs where (SpecsCount == 0).
};
// Flags for ImGui::TableSetupColumn()

26
imgui_demo.cpp
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@@ -4221,6 +4221,7 @@ static void ShowDemoWindowTables()
ImGui::SetNextItemOpen(open_action != 0);
if (ImGui::TreeNode("Outer size"))
{
ImGui::Text("Using manual/explicit size:");
if (ImGui::BeginTable("##table1", 3, ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg, ImVec2(TEXT_BASE_WIDTH * 30, 0.0f)))
{
for (int row = 0; row < 5; row++)
@@ -4248,6 +4249,30 @@ static void ShowDemoWindowTables()
}
ImGui::EndTable();
}
ImGui::Spacing();
// Showcasing use of ImGuiTableFlags_NoHostExtendX and ImGuiTableFlags_NoHostExtendY
// FIXME-TABLE: WIP API: Don't use yet, will probably rework/rename those flags.
ImGui::Text("Using NoHostExtend flags:");
static ImGuiTableFlags flags = ImGuiTableFlags_Borders | ImGuiTableFlags_Resizable | ImGuiTableFlags_ContextMenuInBody | ImGuiTableFlags_RowBg | ImGuiTableFlags_NoHostExtendX | ImGuiTableFlags_ColumnsWidthFixed;
ImGui::CheckboxFlags("ImGuiTableFlags_NoHostExtendX", &flags, ImGuiTableFlags_NoHostExtendX);
ImGui::CheckboxFlags("ImGuiTableFlags_NoHostExtendY", &flags, ImGuiTableFlags_NoHostExtendY);
if (ImGui::BeginTable("##table3", 3, flags, ImVec2(0.0f, TEXT_BASE_HEIGHT * 5.5f)))
{
for (int row = 0; row < 10; row++)
{
ImGui::TableNextRow();
for (int column = 0; column < 3; column++)
{
ImGui::TableNextColumn();
ImGui::Text("Cell %d,%d", column, row);
}
}
ImGui::EndTable();
}
ImGui::SameLine();
ImGui::Text("Hello!");
ImGui::TreePop();
}
@@ -4715,6 +4740,7 @@ static void ShowDemoWindowTables()
flags &= ~ImGuiTableFlags_ColumnsWidthStretch; // Can't specify both sizing polices so we clear the other
ImGui::SameLine(); HelpMarker("[Default if ScrollX is on]\nEnlarge as needed: enable scrollbar if ScrollX is enabled, otherwise extend parent window's contents rectangle. Only Fixed columns allowed. Stretched columns will calculate their width assuming no scrolling.");
ImGui::CheckboxFlags("ImGuiTableFlags_NoHeadersWidth", &flags, ImGuiTableFlags_NoHeadersWidth);
ImGui::CheckboxFlags("ImGuiTableFlags_NoHostExtendX", &flags, ImGuiTableFlags_NoHostExtendX);
ImGui::CheckboxFlags("ImGuiTableFlags_NoHostExtendY", &flags, ImGuiTableFlags_NoHostExtendY);
ImGui::CheckboxFlags("ImGuiTableFlags_NoKeepColumnsVisible", &flags, ImGuiTableFlags_NoKeepColumnsVisible);
ImGui::SameLine(); HelpMarker("Only available if ScrollX is disabled.");

1
imgui_internal.h
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@@ -2072,6 +2072,7 @@ struct ImGuiTable
bool IsResetAllRequest;
bool IsResetDisplayOrderRequest;
bool IsUnfrozen; // Set when we got past the frozen row.
bool IsOuterRectFitX; // Set when outer_size value passed to BeginTable() is (>= -1.0f && <= 0.0f)
bool MemoryCompacted;
bool HostSkipItems; // Backup of InnerWindow->SkipItem at the end of BeginTable(), because we will overwrite InnerWindow->SkipItem on a per-column basis

48
imgui_tables.cpp
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@@ -38,7 +38,7 @@ Index of this file:
// - TableSetupColumn() user submit columns details (optional)
// - TableSetupScrollFreeze() user submit scroll freeze information (optional)
//-----------------------------------------------------------------------------
// - TableUpdateLayout() [Internal] setup everything, lock all widths, columns positions, clipping rectangles. Automatically called by the FIRST call to TableNextRow() or TableHeadersRow().
// - TableUpdateLayout() [Internal] followup to BeginTable(): setup everything: widths, columns positions, clipping rectangles. Automatically called by the FIRST call to TableNextRow() or TableHeadersRow().
// | TableSetupDrawChannels() - setup ImDrawList channels
// | TableUpdateBorders() - detect hovering columns for resize, ahead of contents submission
// | TableDrawContextMenu() - draw right-click context menu
@@ -280,6 +280,7 @@ bool ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImG
table->InnerWidth = inner_width;
table->OuterRect = outer_rect;
table->WorkRect = outer_rect;
table->IsOuterRectFitX = (outer_size.x >= -1.0f && outer_size.x <= 0.0f); // Bit ambiguous
// When not using a child window, WorkRect.Max will grow as we append contents.
if (use_child_window)
@@ -325,7 +326,6 @@ bool ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImG
table->HostBackupCursorMaxPos = inner_window->DC.CursorMaxPos;
table->HostBackupItemWidth = outer_window->DC.ItemWidth;
table->HostBackupItemWidthStackSize = outer_window->DC.ItemWidthStack.Size;
inner_window->ParentWorkRect = table->WorkRect;
inner_window->DC.PrevLineSize = inner_window->DC.CurrLineSize = ImVec2(0.0f, 0.0f);
// Padding and Spacing
@@ -356,13 +356,6 @@ bool ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImG
table->InnerClipRect.ClipWithFull(table->HostClipRect);
table->InnerClipRect.Max.y = (flags & ImGuiTableFlags_NoHostExtendY) ? ImMin(table->InnerClipRect.Max.y, inner_window->WorkRect.Max.y) : inner_window->ClipRect.Max.y;
// Initial draw cmd starts with a BgClipRect that matches the one of its host, to facilitate merge draw commands by default.
// This is because all our cell highlight are manually clipped with BgClipRect
// Larger at first, if/after unfreezing will become same as tight
table->BgClipRect = table->InnerClipRect;
table->BgClipRectForDrawCmd = table->HostClipRect;
IM_ASSERT(table->BgClipRect.Min.y <= table->BgClipRect.Max.y);
table->RowPosY1 = table->RowPosY2 = table->WorkRect.Min.y; // This is needed somehow
table->RowTextBaseline = 0.0f; // This will be cleared again by TableBeginRow()
table->FreezeRowsRequest = table->FreezeRowsCount = 0; // This will be setup by TableSetupScrollFreeze(), if any
@@ -373,8 +366,6 @@ bool ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImG
// Using opaque colors facilitate overlapping elements of the grid
table->BorderColorStrong = GetColorU32(ImGuiCol_TableBorderStrong);
table->BorderColorLight = GetColorU32(ImGuiCol_TableBorderLight);
table->BorderX1 = table->InnerClipRect.Min.x;// +((table->Flags & ImGuiTableFlags_BordersOuter) ? 0.0f : -1.0f);
table->BorderX2 = table->InnerClipRect.Max.x;// +((table->Flags & ImGuiTableFlags_BordersOuter) ? 0.0f : +1.0f);
// Make table current
const int table_idx = g.Tables.GetIndex(table);
@@ -1001,26 +992,39 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
// [Part 8] Detect/store when we are hovering the unused space after the right-most column (so e.g. context menus can react on it)
// Clear Resizable flag if none of our column are actually resizable (either via an explicit _NoResize flag, either
// because of using _WidthAutoResize/_WidthStretch). This will hide the resizing option from the context menu.
const float unused_x1 = ImMax(table->WorkRect.Min.x, table->Columns[table->RightMostEnabledColumn].ClipRect.Max.x);
if (is_hovering_table && table->HoveredColumnBody == -1)
{
float unused_x1 = ImMax(table->WorkRect.Min.x, table->Columns[table->RightMostEnabledColumn].ClipRect.Max.x);
if (g.IO.MousePos.x >= unused_x1)
table->HoveredColumnBody = (ImGuiTableColumnIdx)table->ColumnsCount;
}
if (count_resizable == 0 && (table->Flags & ImGuiTableFlags_Resizable))
table->Flags &= ~ImGuiTableFlags_Resizable;
// [Part 9] Allocate draw channels
// [Part 9] Lock actual OuterRect/WorkRect right-most position.
// This is done late to handle the case of fixed-columns tables not claiming more widths that they need.
// Because of this we are careful with uses of WorkRect and InnerClipRect before this point.
if ((table->Flags & ImGuiTableFlags_NoHostExtendX) && table->InnerWindow == table->OuterWindow && table->RightMostStretchedColumn == -1)
{
table->OuterRect.Max.x = table->WorkRect.Max.x = unused_x1;
table->InnerClipRect.Max.x = ImMin(table->InnerClipRect.Max.x, unused_x1);
table->IsOuterRectFitX = false;
}
table->InnerWindow->ParentWorkRect = table->WorkRect;
table->BorderX1 = table->InnerClipRect.Min.x;// +((table->Flags & ImGuiTableFlags_BordersOuter) ? 0.0f : -1.0f);
table->BorderX2 = table->InnerClipRect.Max.x;// +((table->Flags & ImGuiTableFlags_BordersOuter) ? 0.0f : +1.0f);
// [Part 10] Allocate draw channels and setup background cliprect
TableSetupDrawChannels(table);
// [Part 10] Hit testing on borders
// [Part 11] Hit testing on borders
if (table->Flags & ImGuiTableFlags_Resizable)
TableUpdateBorders(table);
table->LastFirstRowHeight = 0.0f;
table->IsLayoutLocked = true;
table->IsUsingHeaders = false;
// [Part 11] Context menu
// [Part 12] Context menu
if (table->IsContextPopupOpen && table->InstanceCurrent == table->InstanceInteracted)
{
const ImGuiID context_menu_id = ImHashStr("##ContextMenu", 0, table->ID);
@@ -1227,14 +1231,14 @@ void ImGui::EndTable()
outer_window->DC.ItemWidth = table->HostBackupItemWidth;
outer_window->DC.ItemWidthStack.Size = table->HostBackupItemWidthStackSize;
outer_window->DC.ColumnsOffset = table->HostBackupColumnsOffset;
const float outer_width = table->IsOuterRectFitX ? table->ColumnsAutoFitWidth : table->WorkRect.GetWidth();
if (inner_window != outer_window)
{
EndChild();
}
else
{
ImVec2 item_size = table->OuterRect.GetSize();
item_size.x = table->ColumnsTotalWidth;
ImVec2 item_size(outer_width, table->OuterRect.GetHeight());
ItemSize(item_size);
}
@@ -1247,7 +1251,8 @@ void ImGui::EndTable()
}
else
{
outer_window->DC.CursorMaxPos.x = ImMax(backup_outer_max_pos_x, table->WorkRect.Min.x + table->ColumnsAutoFitWidth); // For auto-fit
outer_window->DC.CursorMaxPos.x = ImMax(backup_outer_max_pos_x, table->WorkRect.Min.x + outer_width); // For auto-fit
outer_window->DC.CursorPosPrevLine.x = table->WorkRect.Max.x; // For consistent reaction to SameLine() // FIXME: Should be a feature of layout/ItemAdd
}
// Save settings
@@ -2068,6 +2073,13 @@ void ImGui::TableSetupDrawChannels(ImGuiTable* table)
}
column->DrawChannelCurrent = column->DrawChannelFrozen;
}
// Initial draw cmd starts with a BgClipRect that matches the one of its host, to facilitate merge draw commands by default.
// All our cell highlight are manually clipped with BgClipRect. When unfreezing it will be made smaller to fit scrolling rect.
// (This technically isn't part of setting up draw channels, but is reasonably related to be done here)
table->BgClipRect = table->InnerClipRect;
table->BgClipRectForDrawCmd = table->HostClipRect;
IM_ASSERT(table->BgClipRect.Min.y <= table->BgClipRect.Max.y);
}
// This function reorder draw channels based on matching clip rectangle, to facilitate merging them. Called by EndTable().