Tables: fixed propagation of line height from outside the table. Added outer-width demo.

Author: ocornut

imgui_demo.cpp

@@ -4215,6 +4215,41 @@ static void ShowDemoWindowTables()
         ImGui::TreePop();
     }
 
+
+    if (open_action != -1)
+        ImGui::SetNextItemOpen(open_action != 0);
+    if (ImGui::TreeNode("Outer size"))
+    {
+        if (ImGui::BeginTable("##table1", 3, ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg, ImVec2(TEXT_BASE_WIDTH * 30, 0.0f)))
+        {
+            for (int row = 0; row < 5; row++)
+            {
+                ImGui::TableNextRow();
+                for (int column = 0; column < 3; column++)
+                {
+                    ImGui::TableNextColumn();
+                    ImGui::Text("Cell %d,%d", column, row);
+                }
+            }
+            ImGui::EndTable();
+        }
+        ImGui::SameLine();
+        if (ImGui::BeginTable("##table2", 3, ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg, ImVec2(TEXT_BASE_WIDTH * 30, 0.0f)))
+        {
+            for (int row = 0; row < 3; row++)
+            {
+                ImGui::TableNextRow(0, TEXT_BASE_HEIGHT * 1.5f);
+                for (int column = 0; column < 3; column++)
+                {
+                    ImGui::TableNextColumn();
+                    ImGui::Text("Cell %d,%d", column, row);
+                }
+            }
+            ImGui::EndTable();
+        }
+        ImGui::TreePop();
+    }
+
     if (open_action != -1)
         ImGui::SetNextItemOpen(open_action != 0);
     if (ImGui::TreeNode("Background color"))

imgui_internal.h

@@ -2019,6 +2019,8 @@ struct ImGuiTable
     ImRect                      HostBackupWorkRect;         // Backup of InnerWindow->WorkRect at the end of BeginTable()
     ImRect                      HostBackupParentWorkRect;   // Backup of InnerWindow->ParentWorkRect at the end of BeginTable()
     ImRect                      HostBackupClipRect;         // Backup of InnerWindow->ClipRect during PushTableBackground()/PopTableBackground()
+    ImVec2                      HostBackupPrevLineSize;     // Backup of InnerWindow->DC.PrevLineSize at the end of BeginTable()
+    ImVec2                      HostBackupCurrLineSize;     // Backup of InnerWindow->DC.CurrLineSize at the end of BeginTable()
     ImVec2                      HostBackupCursorMaxPos;     // Backup of InnerWindow->DC.CursorMaxPos at the end of BeginTable()
     ImVec1                      HostBackupColumnsOffset;    // Backup of OuterWindow->DC.ColumnsOffset at the end of BeginTable()
     float                       HostBackupItemWidth;        // Backup of OuterWindow->DC.ItemWidth at the end of BeginTable()

imgui_tables.cpp

@@ -240,6 +240,7 @@ ImGuiTable* ImGui::TableFindByID(ImGuiID id)
     return g.Tables.GetByKey(id);
 }
 
+// Read about "TABLE SIZING" at the top of this file.
 bool    ImGui::BeginTable(const char* str_id, int columns_count, ImGuiTableFlags flags, const ImVec2& outer_size, float inner_width)
 {
     ImGuiID id = GetID(str_id);
@@ -331,10 +332,13 @@ bool    ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImG
     table->HostBackupWorkRect = inner_window->WorkRect;
     table->HostBackupParentWorkRect = inner_window->ParentWorkRect;
     table->HostBackupColumnsOffset = outer_window->DC.ColumnsOffset;
+    table->HostBackupPrevLineSize = inner_window->DC.PrevLineSize;
+    table->HostBackupCurrLineSize = inner_window->DC.CurrLineSize;
     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
     // - None               ........Content..... Pad .....Content........
@@ -1137,6 +1141,8 @@ void    ImGui::EndTable()
             TableOpenContextMenu((int)table->HoveredColumnBody);
 
     // Finalize table height
+    inner_window->DC.PrevLineSize = table->HostBackupPrevLineSize;
+    inner_window->DC.CurrLineSize = table->HostBackupCurrLineSize;
     inner_window->DC.CursorMaxPos = table->HostBackupCursorMaxPos;
     if (inner_window != outer_window)
     {