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

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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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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