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Tables: TableHeader() uses provided row min header rather than incremental one to allow multi-item multi-line in header cells. Demo TableHeader() - will caveat, comments.

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omar 2020-01-20 12:41:23 +01:00 committed by ocornut
parent 5431cbd3f0
commit f5eee210a0
3 changed files with 54 additions and 3 deletions
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48
imgui_demo.cpp
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@ -3940,6 +3940,54 @@ static void ShowDemoWindowTables()
ImGui::TreePop();
}
// Demonstrate using TableHeader() calls instead of TableAutoHeaders()
// FIXME-TABLE: Currently this doesn't get us feature-parity with TableAutoHeaders(), e.g. missing context menu. Tables API needs some work!
if (open_action != -1)
ImGui::SetNextItemOpen(open_action != 0);
if (ImGui::TreeNode("Custom headers"))
{
const int COLUMNS_COUNT = 3;
if (ImGui::BeginTable("##table1", COLUMNS_COUNT, ImGuiTableFlags_Borders | ImGuiTableFlags_Reorderable))
{
ImGui::TableSetupColumn("Apricot");
ImGui::TableSetupColumn("Banana");
ImGui::TableSetupColumn("Cherry");
// Dummy entire-column selection storage
// FIXME: It would be nice to actually demonstrate full-featured selection using those checkbox.
static bool column_selected[3] = {};
// Instead of calling TableAutoHeaders() we'll submit custom headers ourselves
ImGui::TableNextRow(ImGuiTableRowFlags_Headers);
for (int column = 0; column < COLUMNS_COUNT; column++)
{
ImGui::TableSetColumnIndex(column);
const char* column_name = ImGui::TableGetColumnName(column); // Retrieve name passed to TableSetupColumn()
ImGui::PushID(column);
ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0, 0));
ImGui::Checkbox("##checkall", &column_selected[column]);
ImGui::PopStyleVar();
ImGui::SameLine(0.0f, ImGui::GetStyle().ItemInnerSpacing.x);
ImGui::TableHeader(column_name);
ImGui::PopID();
}
for (int row = 0; row < 5; row++)
{
ImGui::TableNextRow();
for (int column = 0; column < 3; column++)
{
char buf[32];
sprintf(buf, "Cell %d,%d", row, column);
ImGui::TableSetColumnIndex(column);
ImGui::Selectable(buf, column_selected[column]);
}
}
ImGui::EndTable();
}
ImGui::TreePop();
}
static const char* template_items_names[] =
{
"Banana", "Apple", "Cherry", "Watermelon", "Grapefruit", "Strawberry", "Mango",

1
imgui_internal.h
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@ -1898,6 +1898,7 @@ struct ImGuiTable
ImS16 InstanceInteracted; // Mark which instance (generally 0) of the same ID is being interacted with
float RowPosY1;
float RowPosY2;
float RowMinHeight; // Height submitted to TableNextRow()
float RowTextBaseline;
ImGuiTableRowFlags RowFlags : 16; // Current row flags, see ImGuiTableRowFlags_
ImGuiTableRowFlags LastRowFlags : 16;

8
imgui_tables.cpp
View File

@ -1419,7 +1419,7 @@ void ImGui::TableSetupColumn(const char* label, ImGuiTableColumnFlags flags,
}
// Starts into the first cell of a new row
void ImGui::TableNextRow(ImGuiTableRowFlags row_flags, float min_row_height)
void ImGui::TableNextRow(ImGuiTableRowFlags row_flags, float row_min_height)
{
ImGuiContext& g = *GImGui;
ImGuiTable* table = g.CurrentTable;
@ -1431,12 +1431,13 @@ void ImGui::TableNextRow(ImGuiTableRowFlags row_flags, float min_row_height)
table->LastRowFlags = table->RowFlags;
table->RowFlags = row_flags;
table->RowMinHeight = row_min_height;
TableBeginRow(table);
// We honor min_row_height requested by user, but cannot guarantee per-row maximum height,
// because that would essentially require a unique clipping rectangle per-cell.
table->RowPosY2 += table->CellPaddingY * 2.0f;
table->RowPosY2 = ImMax(table->RowPosY2, table->RowPosY1 + min_row_height);
table->RowPosY2 = ImMax(table->RowPosY2, table->RowPosY1 + row_min_height);
TableBeginCell(table, 0);
}
@ -1937,6 +1938,7 @@ void ImGui::TableAutoHeaders()
// Emit a column header (text + optional sort order)
// We cpu-clip text here so that all columns headers can be merged into a same draw call.
// Note that because of how we cpu-clip and display sorting indicators, you _cannot_ use SameLine() after a TableHeader()
// FIXME-TABLE: Should hold a selection state.
// FIXME-TABLE: Style confusion between CellPadding.y and FramePadding.y
void ImGui::TableHeader(const char* label)
@ -1961,7 +1963,7 @@ void ImGui::TableHeader(const char* label)
// If we already got a row height, there's use that.
ImRect cell_r = TableGetCellRect();
float label_height = ImMax(label_size.y, cell_r.GetHeight() - g.Style.CellPadding.y * 2.0f);
float label_height = ImMax(label_size.y, table->RowMinHeight - g.Style.CellPadding.y * 2.0f);
//GetForegroundDrawList()->AddRect(cell_r.Min, cell_r.Max, IM_COL32(255, 0, 0, 255)); // [DEBUG]
ImRect work_r = cell_r;