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Tables: Clear scroll value when reactivating scroll. Assert when passing width/weight to TableSetupColumn() without an explicit sizing policy at either table or column label.

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Clearing scroll was initially made desirable by tests exhibiting side effects but generally feels saner.
table->UserOuterSize is poorly used in this commit but will be by subsequent commits.
This commit is contained in:
ocornut 2021-01-19 21:53:35 +01:00
parent 0ea4408fd4
commit 3fef132f62
2 changed files with 14 additions and 3 deletions
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2
imgui_internal.h
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@ -2037,6 +2037,7 @@ struct ImGuiTable
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()
ImVec2 UserOuterSize; // outer_size.x passed to 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()
int HostBackupItemWidthStackSize;// Backup of OuterWindow->DC.ItemWidthStack.Size at the end of BeginTable()
@ -2084,6 +2085,7 @@ struct ImGuiTable
bool IsResetDisplayOrderRequest;
bool IsUnfrozenRows; // Set when we got past the frozen row.
bool IsOuterRectMinFitX; // Set when outer_size.x == 0.0f in BeginTable(), scrolling is disabled, and there are no stretch columns.
bool IsDefaultSizingPolicy; // Set if user didn't explicitely set a sizing policy in BeginTable()
bool MemoryCompacted;
bool HostSkipItems; // Backup of InnerWindow->SkipItem at the end of BeginTable(), because we will overwrite InnerWindow->SkipItem on a per-column basis

15
imgui_tables.cpp
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@ -324,6 +324,7 @@ bool ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImG
IM_ASSERT(table->ColumnsCount == columns_count && "BeginTable(): Cannot change columns count mid-frame while preserving same ID");
// Fix flags
table->IsDefaultSizingPolicy = (flags & ImGuiTableFlags_SizingMask_) == 0;
flags = TableFixFlags(flags, outer_window);
// Initialize
@ -335,7 +336,7 @@ bool ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImG
table->ColumnsCount = columns_count;
table->IsLayoutLocked = false;
table->InnerWidth = inner_width;
table->IsOuterRectMinFitX = (outer_size.x == 0.0f) && (use_child_window == false); // Will be set to false later if there are any Stretch column.
table->UserOuterSize = outer_size;
// When not using a child window, WorkRect.Max will grow as we append contents.
if (use_child_window)
@ -356,6 +357,10 @@ bool ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImG
if (override_content_size.x != FLT_MAX || override_content_size.y != FLT_MAX)
SetNextWindowContentSize(ImVec2(override_content_size.x != FLT_MAX ? override_content_size.x : 0.0f, override_content_size.y != FLT_MAX ? override_content_size.y : 0.0f));
// Reset scroll if we are reactivating it
if ((table_last_flags & (ImGuiTableFlags_ScrollX | ImGuiTableFlags_ScrollY)) == 0)
SetNextWindowScroll(ImVec2(0.0f, 0.0f));
// Create scrolling region (without border and zero window padding)
ImGuiWindowFlags child_flags = (flags & ImGuiTableFlags_ScrollX) ? ImGuiWindowFlags_HorizontalScrollbar : ImGuiWindowFlags_None;
BeginChildEx(name, instance_id, outer_rect.GetSize(), false, child_flags);
@ -1031,8 +1036,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
// [Part 8] 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->RightMostStretchedColumn != -1)
table->IsOuterRectMinFitX = false;
table->IsOuterRectMinFitX = (table->UserOuterSize.x == 0.0f) && table->RightMostStretchedColumn == -1 && (table->InnerWindow == table->OuterWindow);
if (table->IsOuterRectMinFitX)
{
table->OuterRect.Max.x = table->WorkRect.Max.x = unused_x1;
@ -1338,6 +1342,11 @@ void ImGui::TableSetupColumn(const char* label, ImGuiTableColumnFlags flags, flo
ImGuiTableColumn* column = &table->Columns[table->DeclColumnsCount];
table->DeclColumnsCount++;
// Assert when passing a width or weight if policy is entirely left to default, to avoid storing width into weight and vice-versa.
// Give a grace to users of ImGuiTableFlags_ScrollX.
if (table->IsDefaultSizingPolicy && (flags & ImGuiTableColumnFlags_WidthMask_) == 0 && (flags & ImGuiTableFlags_ScrollX) == 0)
IM_ASSERT(init_width_or_weight <= 0.0f && "Can only specify width/weight if sizing policy is set explicitely in either Table or Column.");
// When passing a width automatically enforce WidthFixed policy
// (whereas TableSetupColumnFlags would default to WidthAuto if table is not Resizable)
if ((flags & ImGuiTableColumnFlags_WidthMask_) == 0 && init_width_or_weight > 0.0f)