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RangeSelect/MultiSelect: Demo: Added pointer indirection and indent level.

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This is to reduce noise for upcoming commits, ahead of adding a loop here.
features/range_select
ocornut ago%!(EXTRA string=3 years)
parent b08f438669
commit e401194989
1 changed files with 104 additions and 95 deletions
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  1. 199
      imgui_demo.cpp

199
imgui_demo.cpp
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@ -2886,9 +2886,10 @@ static void ShowDemoWindowMultiSelect()
if (ImGui::TreeNode("Multiple Selection (full, advanced)")) if (ImGui::TreeNode("Multiple Selection (full, advanced)"))
{ {
// Demonstrate holding/updating multi-selection data and using the BeginMultiSelect/EndMultiSelect API to support range-selection and clipping. // Demonstrate holding/updating multi-selection data and using the BeginMultiSelect/EndMultiSelect API to support range-selection and clipping.
static ExampleSelection selection; static ExampleSelection selections_data[1];
ExampleSelection* selection = &selections_data[0];
// Test both Selectable() and TreeNode() widgets // Options
enum WidgetType { WidgetType_Selectable, WidgetType_TreeNode }; enum WidgetType { WidgetType_Selectable, WidgetType_TreeNode };
static bool use_table = false; static bool use_table = false;
static bool use_drag_drop = true; static bool use_drag_drop = true;
@ -2899,103 +2900,124 @@ static void ShowDemoWindowMultiSelect()
ImGui::Checkbox("Use table", &use_table); ImGui::Checkbox("Use table", &use_table);
ImGui::Checkbox("Use drag & drop", &use_drag_drop); ImGui::Checkbox("Use drag & drop", &use_drag_drop);
ImGui::Text("Selection size: %d", selection.GetSelectionSize()); // (spare brace to add a loop here later)
// Open a scrolling region
const int ITEMS_COUNT = 1000;
if (ImGui::BeginListBox("##Basket", ImVec2(-FLT_MIN, ImGui::GetFontSize() * 20)))
{ {
ImVec2 color_button_sz(ImGui::GetFontSize(), ImGui::GetFontSize()); ImGui::Text("Selection size: %d", selection->GetSelectionSize());
if (widget_type == WidgetType_TreeNode)
ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(ImGui::GetStyle().ItemSpacing.x, 0.0f));
ImGuiMultiSelectData* multi_select_data = ImGui::BeginMultiSelect(ImGuiMultiSelectFlags_None, (void*)(intptr_t)selection.RangeRef, selection.GetSelected(selection.RangeRef));
if (multi_select_data->RequestClear) { selection.Clear(); }
if (multi_select_data->RequestSelectAll) { selection.SelectAll(ITEMS_COUNT); }
if (use_table) // Open a scrolling region
const int ITEMS_COUNT = 1000;
if (ImGui::BeginListBox("##Basket", ImVec2(-FLT_MIN, ImGui::GetFontSize() * 20)))
{ {
ImGui::PushStyleVar(ImGuiStyleVar_CellPadding, ImVec2(0.0f, 0.0f)); ImVec2 color_button_sz(ImGui::GetFontSize(), ImGui::GetFontSize());
ImGui::BeginTable("##Split", 2, ImGuiTableFlags_Resizable | ImGuiTableFlags_NoSavedSettings | ImGuiTableFlags_NoPadOuterX); if (widget_type == WidgetType_TreeNode)
ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthStretch, 0.70f); ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(ImGui::GetStyle().ItemSpacing.x, 0.0f));
ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthStretch, 0.30f);
//ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(ImGui::GetStyle().ItemSpacing.x, 0.0f));
}
ImGuiListClipper clipper; ImGuiMultiSelectData* multi_select_data = ImGui::BeginMultiSelect(ImGuiMultiSelectFlags_None, (void*)(intptr_t)selection->RangeRef, selection->GetSelected(selection->RangeRef));
clipper.Begin(ITEMS_COUNT); if (multi_select_data->RequestClear) { selection->Clear(); }
while (clipper.Step()) if (multi_select_data->RequestSelectAll) { selection->SelectAll(ITEMS_COUNT); }
{
// IF clipping is used you need to set 'RangeSrcPassedBy = true' if RangeRef was passed over.
if (clipper.DisplayStart > selection.RangeRef)
multi_select_data->RangeSrcPassedBy = true;
for (int n = clipper.DisplayStart; n < clipper.DisplayEnd; n++) if (use_table)
{ {
if (use_table) ImGui::PushStyleVar(ImGuiStyleVar_CellPadding, ImVec2(0.0f, 0.0f));
ImGui::TableNextColumn(); ImGui::BeginTable("##Split", 2, ImGuiTableFlags_Resizable | ImGuiTableFlags_NoSavedSettings | ImGuiTableFlags_NoPadOuterX);
ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthStretch, 0.70f);
ImGui::PushID(n); ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthStretch, 0.30f);
const char* category = random_names[n % IM_ARRAYSIZE(random_names)]; //ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(ImGui::GetStyle().ItemSpacing.x, 0.0f));
char label[64]; }
sprintf(label, "Object %05d (category: %s)", n, category);
bool item_is_selected = selection.GetSelected(n);
// Emit a color button, to test that Shift+LeftArrow landing on an item that is not part
// of the selection scope doesn't erroneously alter our selection (FIXME-TESTS: Add a test for that!).
ImU32 dummy_col = (ImU32)((unsigned int)n * 0xC250B74B) | IM_COL32_A_MASK;
ImGui::ColorButton("##", ImColor(dummy_col), ImGuiColorEditFlags_NoTooltip, color_button_sz);
ImGui::SameLine();
ImGui::SetNextItemSelectionUserData(n); ImGuiListClipper clipper;
if (widget_type == WidgetType_Selectable) clipper.Begin(ITEMS_COUNT);
while (clipper.Step())
{
// IF clipping is used you need to set 'RangeSrcPassedBy = true' if RangeRef was passed over.
if (clipper.DisplayStart > selection->RangeRef)
multi_select_data->RangeSrcPassedBy = true;
for (int n = clipper.DisplayStart; n < clipper.DisplayEnd; n++)
{ {
ImGui::Selectable(label, item_is_selected); if (use_table)
if (ImGui::IsItemToggledSelection()) ImGui::TableNextColumn();
selection.SetSelected(n, !item_is_selected);
if (use_drag_drop && ImGui::BeginDragDropSource()) ImGui::PushID(n);
const char* category = random_names[n % IM_ARRAYSIZE(random_names)];
char label[64];
sprintf(label, "Object %05d (category: %s)", n, category);
bool item_is_selected = selection->GetSelected(n);
// Emit a color button, to test that Shift+LeftArrow landing on an item that is not part
// of the selection scope doesn't erroneously alter our selection (FIXME-TESTS: Add a test for that!).
ImU32 dummy_col = (ImU32)((unsigned int)n * 0xC250B74B) | IM_COL32_A_MASK;
ImGui::ColorButton("##", ImColor(dummy_col), ImGuiColorEditFlags_NoTooltip, color_button_sz);
ImGui::SameLine();
ImGui::SetNextItemSelectionUserData(n);
if (widget_type == WidgetType_Selectable)
{ {
ImGui::Text("(Dragging %d items)", selection.GetSelectionSize()); ImGui::Selectable(label, item_is_selected);
ImGui::EndDragDropSource(); if (ImGui::IsItemToggledSelection())
selection->SetSelected(n, !item_is_selected);
if (use_drag_drop && ImGui::BeginDragDropSource())
{
ImGui::Text("(Dragging %d items)", selection->GetSelectionSize());
ImGui::EndDragDropSource();
}
} }
} else if (widget_type == WidgetType_TreeNode)
else if (widget_type == WidgetType_TreeNode)
{
ImGuiTreeNodeFlags tree_node_flags = ImGuiTreeNodeFlags_SpanAvailWidth;
tree_node_flags |= ImGuiTreeNodeFlags_OpenOnArrow | ImGuiTreeNodeFlags_OpenOnDoubleClick;
if (item_is_selected)
tree_node_flags |= ImGuiTreeNodeFlags_Selected;
bool open = ImGui::TreeNodeEx(label, tree_node_flags);
if (ImGui::IsItemToggledSelection())
selection.SetSelected(n, !item_is_selected);
if (use_drag_drop && ImGui::BeginDragDropSource())
{ {
ImGui::Text("(Dragging %d items)", selection.GetSelectionSize()); ImGuiTreeNodeFlags tree_node_flags = ImGuiTreeNodeFlags_SpanAvailWidth;
ImGui::EndDragDropSource(); tree_node_flags |= ImGuiTreeNodeFlags_OpenOnArrow | ImGuiTreeNodeFlags_OpenOnDoubleClick;
if (item_is_selected)
tree_node_flags |= ImGuiTreeNodeFlags_Selected;
bool open = ImGui::TreeNodeEx(label, tree_node_flags);
if (ImGui::IsItemToggledSelection())
selection->SetSelected(n, !item_is_selected);
if (use_drag_drop && ImGui::BeginDragDropSource())
{
ImGui::Text("(Dragging %d items)", selection->GetSelectionSize());
ImGui::EndDragDropSource();
}
if (open)
ImGui::TreePop();
} }
if (open)
ImGui::TreePop();
}
// Right-click: context menu // Right-click: context menu
if (ImGui::BeginPopupContextItem()) if (ImGui::BeginPopupContextItem())
{ {
ImGui::Text("(Testing Selectable inside an embedded popup)"); ImGui::Text("(Testing Selectable inside an embedded popup)");
ImGui::Selectable("Close"); ImGui::Selectable("Close");
ImGui::EndPopup(); ImGui::EndPopup();
} }
if (use_table) if (use_table)
{ {
ImGui::TableNextColumn(); ImGui::TableNextColumn();
ImGui::SetNextItemWidth(-FLT_MIN); ImGui::SetNextItemWidth(-FLT_MIN);
ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0, 0)); ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0, 0));
ImGui::InputText("###NoLabel", (char*)(void*)category, strlen(category), ImGuiInputTextFlags_ReadOnly); ImGui::InputText("###NoLabel", (char*)(void*)category, strlen(category), ImGuiInputTextFlags_ReadOnly);
ImGui::PopStyleVar(); ImGui::PopStyleVar();
}
ImGui::PopID();
} }
}
ImGui::PopID(); if (use_table)
{
ImGui::EndTable();
ImGui::PopStyleVar();
} }
// Apply multi-select requests
multi_select_data = ImGui::EndMultiSelect();
selection->RangeRef = (int)(intptr_t)multi_select_data->RangeSrc;
if (multi_select_data->RequestClear) { selection->Clear(); }
if (multi_select_data->RequestSelectAll) { selection->SelectAll(ITEMS_COUNT); }
if (multi_select_data->RequestSetRange) { selection->SetRange((int)(intptr_t)multi_select_data->RangeSrc, (int)(intptr_t)multi_select_data->RangeDst, multi_select_data->RangeValue ? 1 : 0); }
if (widget_type == WidgetType_TreeNode)
ImGui::PopStyleVar();
ImGui::EndListBox();
} }
if (use_table) if (use_table)
@ -3003,20 +3025,7 @@ static void ShowDemoWindowMultiSelect()
ImGui::EndTable(); ImGui::EndTable();
ImGui::PopStyleVar(); ImGui::PopStyleVar();
} }
// Apply multi-select requests
multi_select_data = ImGui::EndMultiSelect();
selection.RangeRef = (int)(intptr_t)multi_select_data->RangeSrc;
if (multi_select_data->RequestClear) { selection.Clear(); }
if (multi_select_data->RequestSelectAll) { selection.SelectAll(ITEMS_COUNT); }
if (multi_select_data->RequestSetRange) { selection.SetRange((int)(intptr_t)multi_select_data->RangeSrc, (int)(intptr_t)multi_select_data->RangeDst, multi_select_data->RangeValue ? 1 : 0); }
if (widget_type == WidgetType_TreeNode)
ImGui::PopStyleVar();
ImGui::EndListBox();
} }
ImGui::TreePop(); ImGui::TreePop();
} }
ImGui::TreePop(); ImGui::TreePop();

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