Open
Description
Version/Branch of Dear ImGui:
1.91.7 docking
Back-ends:
imgui_impl_sdl2.cpp + imgui_impl_opengl3.cpp
Compiler, OS:
Linux, GCC-13
Full config/build information:
Dear ImGui 1.91.7 (19170)
--------------------------------
sizeof(size_t): 8, sizeof(ImDrawIdx): 2, sizeof(ImDrawVert): 20
define: __cplusplus=202002
define: __linux__
define: __GNUC__=13
define: IMGUI_HAS_VIEWPORT
define: IMGUI_HAS_DOCK
--------------------------------
io.BackendPlatformName: imgui_impl_sdl2
io.BackendRendererName: imgui_impl_opengl3
io.ConfigFlags: 0x00000481
NavEnableKeyboard
DockingEnable
ViewportsEnable
io.ConfigViewportsNoDecoration
io.ConfigNavCaptureKeyboard
io.ConfigInputTextCursorBlink
io.ConfigWindowsResizeFromEdges
io.ConfigWindowsMoveFromTitleBarOnly
io.ConfigMemoryCompactTimer = 60.0
io.BackendFlags: 0x00001C0E
HasMouseCursors
HasSetMousePos
PlatformHasViewports
HasMouseHoveredViewport
RendererHasVtxOffset
RendererHasViewports
--------------------------------
io.Fonts: 12 fonts, Flags: 0x00000000, TexSize: 4096,16384
io.DisplaySize: 1920.00,1011.00
io.DisplayFramebufferScale: 1.00,1.00
--------------------------------
style.WindowPadding: 16.00,16.00
style.WindowBorderSize: 6.00
style.FramePadding: 4.00,4.00
style.FrameRounding: 4.00
style.FrameBorderSize: 1.00
style.ItemSpacing: 6.00,4.00
style.ItemInnerSpacing: 4.00,4.00
Details:
My Issue/Question:
I have a table with many columns. In this table the columns will represent values all of the same time, for example all values within one column are integers, or strings, whatever... but all values in each column are the same type. (in this example, all columns are integers)
Now, I want to multi-select cells only within a single column of the table, so I can set all the selected cells to the same value, like this:
This looks like it's working, but I can not 'box select' with mouse around the values I want, I can only use the CTRL + SHIFT and click?
I am not sure why it's not working, because I think it should be.
Screenshots/Video:
In this video, I am using the SHIFT + CTRL keys... Dragging only works at the end outside the table (ScopeWindow flag is used, ScopeRect does not work at all)
ImGuiMultiSelect-2025-01-31_17.07.40.mp4
Minimal, Complete and Verifiable Example code:
// Just call DrawTable() in main loop...
static const int kNumRows = 10;
static const int kNumCols = 4;
static int g_Data[kNumRows][kNumCols] = {};
void InitializeTestData()
{
static bool initialized = false;
if (!initialized)
{
for (int r = 0; r < kNumRows; r++)
for (int c = 0; c < kNumCols; c++)
g_Data[r][c] = (r+1)*100 + c; // arbitrary
initialized = true;
}
}
void DrawTable(){
InitializeTestData();
static ImGuiSelectionBasicStorage s_Selection;
static int s_ActiveColumn = -1; // -1 => no column chosen yet
ImGui::Begin("Table Window");
ImGuiMultiSelectFlags ms_flags =
ImGuiMultiSelectFlags_ClearOnEscape
| ImGuiMultiSelectFlags_ClearOnClickVoid
| ImGuiMultiSelectFlags_BoxSelect2d
| ImGuiMultiSelectFlags_ScopeWindow
| ImGuiMultiSelectFlags_SelectOnClickRelease;
ImGuiTableFlags TABLE_FLAGS = ImGuiTableFlags_Borders | ImGuiTableFlags_ScrollY | ImGuiTableFlags_Resizable;
ImGuiMultiSelectIO* ms_io = ImGui::BeginMultiSelect(ms_flags, s_Selection.Size, kNumRows);
s_Selection.ApplyRequests(ms_io);
if (ImGui::BeginTable("TestTable", kNumCols, TABLE_FLAGS, ImVec2(0, -24)))
{
ImGui::TableSetupColumn("Col 0");
ImGui::TableSetupColumn("Col 1");
ImGui::TableSetupColumn("Col 2");
ImGui::TableSetupColumn("Col 3");
ImGui::TableHeadersRow();
for (int row = 0; row < kNumRows; row++)
{
ImGui::TableNextRow();
for (int col = 0; col < kNumCols; col++)
{
ImGui::TableSetColumnIndex(col);
int cell_value = g_Data[row][col];
// If no active column chosen yet, any click in this column can activate it
// If we already have active column, only that column is selectable
bool can_select_this_column = (s_ActiveColumn == -1 || s_ActiveColumn == col);
if (can_select_this_column)
{
// next item -- row index
ImGui::SetNextItemSelectionUserData((ImS64)row);
// Is row selected?
bool is_selected = s_Selection.Contains((ImGuiID)row);
char label[32];
snprintf(label, sizeof(label), "%d", cell_value);
if (ImGui::Selectable(label, is_selected, ImGuiSelectableFlags_AllowItemOverlap))
{
if (s_Selection.Size == 0)
s_ActiveColumn = col;
}
// If clicked inside this column and it wasn't active before, choose it as active column
if (s_ActiveColumn == -1 && ImGui::IsItemActivated())
{
s_ActiveColumn = col;
}
}
else
{
// Another column is already active, so we are not using a selectable
ImGui::Text("%d", cell_value);
}
}
}
ImGui::EndTable();
}
// end multi-select scope
ImGuiMultiSelectIO* ms_io_end = ImGui::EndMultiSelect();
s_Selection.ApplyRequests(ms_io_end);
// clear active column if selection is empty:
if (s_Selection.Size == 0)
s_ActiveColumn = -1;
ImGui::Text("Active Column: %d | Selected Rows: %d", s_ActiveColumn, s_Selection.Size);
ImGui::End();
}