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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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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().