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MultiSelect: Box-Select: Added ImGuiMultiSelectFlags_BoxSelect2d support. Enabled in Asset Browser. Selectable() supports it.

This commit is contained in:
ocornut 2023-12-20 21:14:09 +01:00
parent 1ac469b50f
commit 15391762dd
5 changed files with 84 additions and 51 deletions
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4
imgui.cpp
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@ -3091,6 +3091,10 @@ static bool ImGuiListClipper_StepInternal(ImGuiListClipper* clipper)
// As a workaround we currently half ItemSpacing worth on each side.
min_y -= g.Style.ItemSpacing.y;
max_y += g.Style.ItemSpacing.y;
// Box-select on 2D area requires different clipping.
if (ms->BoxSelectUnclipMode)
data->Ranges.push_back(ImGuiListClipperRange::FromPositions(ms->BoxSelectUnclipRect.Min.y, ms->BoxSelectUnclipRect.Max.y, 0, 0));
}
const int off_min = (is_nav_request && g.NavMoveClipDir == ImGuiDir_Up) ? -1 : 0;

17
imgui.h
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@ -2774,14 +2774,15 @@ enum ImGuiMultiSelectFlags_
ImGuiMultiSelectFlags_None = 0,
ImGuiMultiSelectFlags_SingleSelect = 1 << 0, // Disable selecting more than one item. This is available to allow single-selection code to share same code/logic if desired. It essentially disables the main purpose of BeginMultiSelect() tho!
ImGuiMultiSelectFlags_NoSelectAll = 1 << 1, // Disable CTRL+A shortcut sending a SelectAll request.
ImGuiMultiSelectFlags_BoxSelect = 1 << 2, // Enable box-selection. Box-selection + clipper is currently only supported for 1D list (not with 2D grid). Box-selection works better with little bit of spacing between items hit-box in order to be able to aim at empty space.
ImGuiMultiSelectFlags_BoxSelectNoScroll = 1 << 3, // Disable scrolling when box-selecting near edges of scope.
ImGuiMultiSelectFlags_ClearOnEscape = 1 << 4, // Clear selection when pressing Escape while scope is focused.
ImGuiMultiSelectFlags_ClearOnClickVoid = 1 << 5, // Clear selection when clicking on empty location within scope.
ImGuiMultiSelectFlags_ScopeWindow = 1 << 6, // Scope for _ClearOnClickVoid and _BoxSelect is whole window (Default). Use if BeginMultiSelect() covers a whole window.
ImGuiMultiSelectFlags_ScopeRect = 1 << 7, // Scope for _ClearOnClickVoid and _BoxSelect is rectangle covering submitted items. Use if multiple BeginMultiSelect() are used in the same host window.
ImGuiMultiSelectFlags_SelectOnClick = 1 << 8, // Apply selection on mouse down when clicking on unselected item. (Default)
ImGuiMultiSelectFlags_SelectOnClickRelease = 1 << 9, // Apply selection on mouse release when clicking an unselected item. Allow dragging an unselected item without altering selection.
ImGuiMultiSelectFlags_BoxSelect = 1 << 2, // Enable box-selection (only supporting 1D list when using clipper, not 2D grids). Box-selection works better with little bit of spacing between items hit-box in order to be able to aim at empty space.
ImGuiMultiSelectFlags_BoxSelect2d = 1 << 3, // Enable box-selection with 2D layout/grid support. This alters clipping logic so that e.g. horizontal movements will update selection of normally clipped items.
ImGuiMultiSelectFlags_BoxSelectNoScroll = 1 << 4, // Disable scrolling when box-selecting near edges of scope.
ImGuiMultiSelectFlags_ClearOnEscape = 1 << 5, // Clear selection when pressing Escape while scope is focused.
ImGuiMultiSelectFlags_ClearOnClickVoid = 1 << 6, // Clear selection when clicking on empty location within scope.
ImGuiMultiSelectFlags_ScopeWindow = 1 << 7, // Scope for _ClearOnClickVoid and _BoxSelect is whole window (Default). Use if BeginMultiSelect() covers a whole window.
ImGuiMultiSelectFlags_ScopeRect = 1 << 8, // Scope for _ClearOnClickVoid and _BoxSelect is rectangle covering submitted items. Use if multiple BeginMultiSelect() are used in the same host window.
ImGuiMultiSelectFlags_SelectOnClick = 1 << 9, // Apply selection on mouse down when clicking on unselected item. (Default)
ImGuiMultiSelectFlags_SelectOnClickRelease = 1 << 10, // Apply selection on mouse release when clicking an unselected item. Allow dragging an unselected item without altering selection.
};
enum ImGuiSelectionRequestType

47
imgui_demo.cpp
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@ -9622,7 +9622,7 @@ struct ExampleAssetsBrowser
// Options
bool ShowTypeOverlay = true;
bool AllowDragUnselected = false;
bool AllowBoxSelect = false; // Unsupported for 2D selection for now.
bool AllowBoxSelect = true;
float IconSize = 32.0f;
int IconSpacing = 10;
int IconHitSpacing = 4; // Increase hit-spacing if you want to make it possible to clear or box-select from gaps. Some spacing is required to able to amend with Shift+box-select. Value is small in Explorer.
@ -9726,9 +9726,7 @@ struct ExampleAssetsBrowser
ImGui::SeparatorText("Selection Behavior");
ImGui::Checkbox("Allow dragging unselected item", &AllowDragUnselected);
ImGui::BeginDisabled(); // Unsupported for 2D selection for now.
ImGui::Checkbox("Allow box-selection", &AllowBoxSelect);
ImGui::EndDisabled();
ImGui::SeparatorText("Layout");
ImGui::SliderFloat("Icon Size", &IconSize, 16.0f, 128.0f, "%.0f");
@ -9778,7 +9776,7 @@ struct ExampleAssetsBrowser
if (AllowDragUnselected)
ms_flags |= ImGuiMultiSelectFlags_SelectOnClickRelease; // To allow dragging an unselected item without altering selection.
if (AllowBoxSelect)
ms_flags |= ImGuiMultiSelectFlags_BoxSelect; // FIXME-MULTISELECT: Box-select not yet supported for 2D selection when using clipper.
ms_flags |= ImGuiMultiSelectFlags_BoxSelect2d; // Enable box-select in 2D mode.
ImGuiMultiSelectIO* ms_io = ImGui::BeginMultiSelect(ms_flags);
// Use custom selection adapter: store ID in selection (recommended)
@ -9798,7 +9796,6 @@ struct ExampleAssetsBrowser
ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(LayoutSelectableSpacing, LayoutSelectableSpacing));
// Rendering parameters
const ImU32 icon_bg_color = IM_COL32(48, 48, 48, 128);
const ImU32 icon_type_overlay_colors[3] = { 0, IM_COL32(200, 70, 70, 255), IM_COL32(70, 170, 70, 255) };
const ImVec2 icon_type_overlay_size = ImVec2(4.0f, 4.0f);
const bool display_label = (LayoutItemSize.x >= ImGui::CalcTextSize("999").x);
@ -9825,13 +9822,9 @@ struct ExampleAssetsBrowser
ImVec2 pos = ImVec2(start_pos.x + (item_idx % column_count) * LayoutItemStep.x, start_pos.y + line_idx * LayoutItemStep.y);
ImGui::SetCursorScreenPos(pos);
// Draw box
ImVec2 box_min(pos.x - 1, pos.y - 1);
ImVec2 box_max(box_min.x + LayoutItemSize.x + 2, box_min.y + LayoutItemSize.y + 2);
draw_list->AddRect(box_min, box_max, IM_COL32(90, 90, 90, 255));
ImGui::SetNextItemSelectionUserData(item_idx);
bool item_is_selected = Selection.Contains((ImGuiID)item_data->ID);
bool item_is_visible = ImGui::IsRectVisible(LayoutItemSize);
ImGui::Selectable("", item_is_selected, ImGuiSelectableFlags_None, LayoutItemSize);
// Update our selection state immediately (without waiting for EndMultiSelect() requests)
@ -9856,19 +9849,26 @@ struct ExampleAssetsBrowser
ImGui::EndDragDropSource();
}
// A real app would likely display an image/thumbnail here.
draw_list->AddRectFilled(box_min, box_max, icon_bg_color);
if (ShowTypeOverlay && item_data->Type != 0)
// Render icon (a real app would likely display an image/thumbnail here)
// Because we use ImGuiMultiSelectFlags_BoxSelect2d mode,
// clipping vertical range may occasionally be larger so we coarse-clip our rendering.
if (item_is_visible)
{
ImU32 type_col = icon_type_overlay_colors[item_data->Type % IM_ARRAYSIZE(icon_type_overlay_colors)];
draw_list->AddRectFilled(ImVec2(box_max.x - 2 - icon_type_overlay_size.x, box_min.y + 2), ImVec2(box_max.x - 2, box_min.y + 2 + icon_type_overlay_size.y), type_col);
}
if (display_label)
{
ImU32 label_col = item_is_selected ? IM_COL32(255, 255, 255, 255) : ImGui::GetColorU32(ImGuiCol_TextDisabled);
char label[32];
sprintf(label, "%d", item_data->ID);
draw_list->AddText(ImVec2(box_min.x, box_max.y - ImGui::GetFontSize()), label_col, label);
ImVec2 box_min(pos.x - 1, pos.y - 1);
ImVec2 box_max(box_min.x + LayoutItemSize.x + 2, box_min.y + LayoutItemSize.y + 2); // Dubious
draw_list->AddRectFilled(box_min, box_max, IM_COL32(48, 48, 48, 200)); // Background color
if (ShowTypeOverlay && item_data->Type != 0)
{
ImU32 type_col = icon_type_overlay_colors[item_data->Type % IM_ARRAYSIZE(icon_type_overlay_colors)];
draw_list->AddRectFilled(ImVec2(box_max.x - 2 - icon_type_overlay_size.x, box_min.y + 2), ImVec2(box_max.x - 2, box_min.y + 2 + icon_type_overlay_size.y), type_col);
}
if (display_label)
{
ImU32 label_col = item_is_selected ? IM_COL32(255, 255, 255, 255) : ImGui::GetColorU32(ImGuiCol_TextDisabled);
char label[32];
sprintf(label, "%d", item_data->ID);
draw_list->AddText(ImVec2(box_min.x, box_max.y - ImGui::GetFontSize()), label_col, label);
}
}
ImGui::PopID();
@ -9893,7 +9893,8 @@ struct ExampleAssetsBrowser
if (want_delete)
Selection.ApplyDeletionPostLoop(ms_io, Items, item_curr_idx_to_focus);
// FIXME-MULTISELECT: Find a way to expose this in public API. This currently requires "imgui_internal.h"
// Keyboard/Gamepad Wrapping
// FIXME-MULTISELECT: Currently an imgui_internal.h API. Find a design/way to expose this in public API.
//ImGui::NavMoveRequestTryWrapping(ImGui::GetCurrentWindow(), ImGuiNavMoveFlags_WrapX);
// Zooming with CTRL+Wheel

2
imgui_internal.h
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@ -1726,8 +1726,10 @@ struct IMGUI_API ImGuiMultiSelectTempData
ImGuiID BoxSelectId;
ImRect BoxSelectRectPrev;
ImRect BoxSelectRectCurr; // Selection rectangle in absolute coordinates (derived every frame from Storage->BoxSelectStartPosRel + MousePos)
ImRect BoxSelectUnclipRect;// Rectangle where ItemAdd() clipping may be temporarily disabled. Need support by multi-select supporting widgets.
ImGuiSelectionUserData BoxSelectLastitem;
ImGuiKeyChord KeyMods;
bool BoxSelectUnclipMode;
bool LoopRequestClear;
bool LoopRequestSelectAll;
bool IsEndIO; // Set when switching IO from BeginMultiSelect() to EndMultiSelect() state.

65
imgui_widgets.cpp
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@ -6775,7 +6775,7 @@ bool ImGui::Selectable(const char* label, bool selected, ImGuiSelectableFlags fl
const bool disabled_item = (flags & ImGuiSelectableFlags_Disabled) != 0;
const bool is_multi_select = (g.NextItemData.ItemFlags & ImGuiItemFlags_IsMultiSelect) != 0; // Before ItemAdd()
const bool item_add = ItemAdd(bb, id, NULL, disabled_item ? (ImGuiItemFlags)ImGuiItemFlags_Disabled : ImGuiItemFlags_None);
const bool is_visible = ItemAdd(bb, id, NULL, disabled_item ? (ImGuiItemFlags)ImGuiItemFlags_Disabled : ImGuiItemFlags_None);
if (span_all_columns)
{
@ -6783,8 +6783,14 @@ bool ImGui::Selectable(const char* label, bool selected, ImGuiSelectableFlags fl
window->ClipRect.Max.x = backup_clip_rect_max_x;
}
if (!item_add)
return false;
if (!is_visible)
{
if (!is_multi_select)
return false;
// Extra layer of "no logic clip" for box-select support
if (!g.CurrentMultiSelect->BoxSelectUnclipMode || !g.CurrentMultiSelect->BoxSelectUnclipRect.Overlaps(bb))
return false;
}
const bool disabled_global = (g.CurrentItemFlags & ImGuiItemFlags_Disabled) != 0;
if (disabled_item && !disabled_global) // Only testing this as an optimization
@ -6857,22 +6863,25 @@ bool ImGui::Selectable(const char* label, bool selected, ImGuiSelectableFlags fl
g.LastItemData.StatusFlags |= ImGuiItemStatusFlags_ToggledSelection;
// Render
if (hovered || selected)
if (is_visible)
{
// FIXME-MULTISELECT: Styling: Color for 'selected' elements? ImGuiCol_HeaderSelected
ImU32 col;
if (selected && !hovered)
col = GetColorU32(ImLerp(GetStyleColorVec4(ImGuiCol_Header), GetStyleColorVec4(ImGuiCol_HeaderHovered), 0.5f));
else
col = GetColorU32((held && hovered) ? ImGuiCol_HeaderActive : hovered ? ImGuiCol_HeaderHovered : ImGuiCol_Header);
RenderFrame(bb.Min, bb.Max, col, false, 0.0f);
}
if (g.NavId == id)
{
ImGuiNavHighlightFlags nav_highlight_flags = ImGuiNavHighlightFlags_Compact | ImGuiNavHighlightFlags_NoRounding;
if (is_multi_select)
nav_highlight_flags |= ImGuiNavHighlightFlags_AlwaysDraw; // Always show the nav rectangle
RenderNavHighlight(bb, id, nav_highlight_flags);
if (hovered || selected)
{
// FIXME-MULTISELECT: Styling: Color for 'selected' elements? ImGuiCol_HeaderSelected
ImU32 col;
if (selected && !hovered)
col = GetColorU32(ImLerp(GetStyleColorVec4(ImGuiCol_Header), GetStyleColorVec4(ImGuiCol_HeaderHovered), 0.5f));
else
col = GetColorU32((held && hovered) ? ImGuiCol_HeaderActive : hovered ? ImGuiCol_HeaderHovered : ImGuiCol_Header);
RenderFrame(bb.Min, bb.Max, col, false, 0.0f);
}
if (g.NavId == id)
{
ImGuiNavHighlightFlags nav_highlight_flags = ImGuiNavHighlightFlags_Compact | ImGuiNavHighlightFlags_NoRounding;
if (is_multi_select)
nav_highlight_flags |= ImGuiNavHighlightFlags_AlwaysDraw; // Always show the nav rectangle
RenderNavHighlight(bb, id, nav_highlight_flags);
}
}
if (span_all_columns)
@ -6883,7 +6892,8 @@ bool ImGui::Selectable(const char* label, bool selected, ImGuiSelectableFlags fl
PopColumnsBackground();
}
RenderTextClipped(text_min, text_max, label, NULL, &label_size, style.SelectableTextAlign, &bb);
if (is_visible)
RenderTextClipped(text_min, text_max, label, NULL, &label_size, style.SelectableTextAlign, &bb);
// Automatically close popups
if (pressed && (window->Flags & ImGuiWindowFlags_Popup) && !(flags & ImGuiSelectableFlags_NoAutoClosePopups) && (g.LastItemData.InFlags & ImGuiItemFlags_AutoClosePopups))
@ -7169,7 +7179,9 @@ ImGuiMultiSelectIO* ImGui::BeginMultiSelect(ImGuiMultiSelectFlags flags)
if ((flags & (ImGuiMultiSelectFlags_ScopeWindow | ImGuiMultiSelectFlags_ScopeRect)) == 0)
flags |= ImGuiMultiSelectFlags_ScopeWindow;
if (flags & ImGuiMultiSelectFlags_SingleSelect)
flags &= ~ImGuiMultiSelectFlags_BoxSelect;
flags &= ~(ImGuiMultiSelectFlags_BoxSelect | ImGuiMultiSelectFlags_BoxSelect2d);
if (flags & ImGuiMultiSelectFlags_BoxSelect2d)
flags |= ImGuiMultiSelectFlags_BoxSelect;
// FIXME: BeginFocusScope()
const ImGuiID id = window->IDStack.back();
@ -7233,6 +7245,7 @@ ImGuiMultiSelectIO* ImGui::BeginMultiSelect(ImGuiMultiSelectFlags flags)
}
// Box-select handling: update active state.
ms->BoxSelectUnclipMode = false;
if (flags & ImGuiMultiSelectFlags_BoxSelect)
{
ms->BoxSelectId = GetID("##BoxSelect");
@ -7267,6 +7280,18 @@ ImGuiMultiSelectIO* ImGui::BeginMultiSelect(ImGuiMultiSelectFlags flags)
ms->BoxSelectRectPrev.Max = ImMax(start_pos_abs, prev_end_pos_abs);
ms->BoxSelectRectCurr.Min = ImMin(start_pos_abs, curr_end_pos_abs);
ms->BoxSelectRectCurr.Max = ImMax(start_pos_abs, curr_end_pos_abs);
// Box-select 2D mode detects horizontal changes (vertical ones are already picked by Clipper)
// Storing an extra rect used by widgets supporting box-select.
if (flags & ImGuiMultiSelectFlags_BoxSelect2d)
if (ms->BoxSelectRectPrev.Min.x != ms->BoxSelectRectCurr.Min.x || ms->BoxSelectRectPrev.Max.x != ms->BoxSelectRectCurr.Max.x)
{
ms->BoxSelectUnclipRect = ms->BoxSelectRectPrev;
ms->BoxSelectUnclipRect.Add(ms->BoxSelectRectCurr);
ms->BoxSelectUnclipMode = true;
}
//GetForegroundDrawList()->AddRect(ms->BoxSelectNoClipRect.Min, ms->BoxSelectNoClipRect.Max, IM_COL32(255,0,0,200), 0.0f, 0, 3.0f);
//GetForegroundDrawList()->AddRect(ms->BoxSelectRectPrev.Min, ms->BoxSelectRectPrev.Max, IM_COL32(255,0,0,200), 0.0f, 0, 3.0f);
//GetForegroundDrawList()->AddRect(ms->BoxSelectRectCurr.Min, ms->BoxSelectRectCurr.Max, IM_COL32(0,255,0,200), 0.0f, 0, 1.0f);
}