Can't make popups in a table to work

[gantsevdenis]

What i have:

• a large table with a dozen of columns. First column has the ID of some item.

What i want in the end:

• when right click (or double-click, i don't care much) on some particular ItemID (first column), I want to show a complex popup with a small table (4x4) indicating some prices.

Difficulties I have:

• I can't find a way to associate the row index when the popup is supposed to fire, I only get the column (table_get_column_flags & is_hovered). I tried to unconditionally set a variable to the currently-hovered-item, however can't get it working
• I tried to simply open_popup/begin_popup when double-click on some particular Item in the table, but the popup never shows up; I only managed to get working the right-click menu. But again, i don't understand how to get the Row Index

Sorry for no code, it is running on the corporate laptop :/

[pthom]

Hi
Please try to provide a bit of code that demonstrates the issue

[pthom]

• wrap each row (or each cell) in PushID(row_idx) / PopID(). Then (row_idx, item_id, ...) is just a normal variable that the popup body can use directly.

• IsMouseDoubleClicked only fires if the cell has a hit-testable item. a Text(...) is not one. Use Selectable(...) (or any interactive widget) and test IsItemHovered() && IsMouseDoubleClicked(0).

Minimal Python repro showing both right-click and double-click on any cell of a table, with the popup displaying the (row, column, item_id) it was opened from:

from imgui_bundle import imgui, immapp, ImVec2

ROWS = 30
COLS = 8


def make_rows():
    rows = []
    for r in range(ROWS):
        item_id = f"ITEM-{r:03d}"
        cells = [f"{(r + 1) * (c + 1) * 1.5:.2f}" for c in range(COLS - 1)]
        prices = [[(r + 1) * (i + 1) * (j + 1) * 0.1 for j in range(4)] for i in range(4)]
        rows.append((item_id, cells, prices))
    return rows


ROW_DATA = make_rows()


def draw_prices_popup(item_id: str, row_idx: int, col_idx: int, prices: list[list[float]]) -> None:
    imgui.text(f"Row {row_idx}, Column {col_idx} — {item_id}")
    imgui.separator()
    if imgui.begin_table("prices", 4, imgui.TableFlags_.borders | imgui.TableFlags_.row_bg):
        for i in range(4):
            imgui.table_next_row()
            for j in range(4):
                imgui.table_set_column_index(j)
                imgui.text(f"{prices[i][j]:.2f}")
        imgui.end_table()


def gui() -> None:
    imgui.text("Right-click or double-click any cell to open a popup that knows its (row, column).")
    imgui.spacing()

    flags = (
        imgui.TableFlags_.borders
        | imgui.TableFlags_.row_bg
        | imgui.TableFlags_.scroll_y
        | imgui.TableFlags_.resizable
    )
    if imgui.begin_table("items", COLS, flags, ImVec2(0, 400)):
        imgui.table_setup_column("ItemID")
        for c in range(COLS - 1):
            imgui.table_setup_column(f"col{c + 1}")
        imgui.table_headers_row()

        for row_idx, (item_id, cells, prices) in enumerate(ROW_DATA):
            imgui.table_next_row()
            row_cells = [item_id, *cells]

            for col_idx, value in enumerate(row_cells):
                imgui.table_set_column_index(col_idx)

                # imgui.push_id: use unique ID per cell so popup IDs don't collide across rows/cols.
                # (You may also do this only per row, if you don't need to distinguish between columns)
                imgui.push_id(row_idx * COLS + col_idx)

                # Selectable gives the cell a hit-testable item for both
                # BeginPopupContextItem (right-click) and IsMouseDoubleClicked.
                imgui.selectable(value, False)

                # Right-click context menu, bound to the Selectable above.
                if imgui.begin_popup_context_item("ctx"):
                    draw_prices_popup(item_id, row_idx, col_idx, prices)
                    imgui.end_popup()

                # Double-click: OpenPopup + BeginPopup share the same ID scope
                # (we're inside PushID), so the open request reaches the popup.
                if imgui.is_item_hovered() and imgui.is_mouse_double_clicked(0):
                    imgui.open_popup("dbl")
                if imgui.begin_popup("dbl"):
                    draw_prices_popup(item_id, row_idx, col_idx, prices)
                    imgui.end_popup()

                imgui.pop_id()

        imgui.end_table()


def main() -> None:
    immapp.run(gui_function=gui, window_title="disc #469 — table popups", window_size=(900, 500))


if __name__ == "__main__":
    main()