569 lines
18 KiB
C++
569 lines
18 KiB
C++
#include "ProductHierarchyPanel.h"
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#include "Icons/ProductBuiltInIcons.h"
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#include "Panels/ProductTreeViewStyle.h"
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#include <XCEditor/Collections/UIEditorTreeView.h>
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#include <algorithm>
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#include <cmath>
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#include <string>
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#include <string_view>
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namespace XCEngine::UI::Editor::App {
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namespace {
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using ::XCEngine::UI::UIColor;
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using ::XCEngine::UI::UIDrawList;
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using ::XCEngine::UI::UIInputEvent;
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using ::XCEngine::UI::UIInputEventType;
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using ::XCEngine::UI::UIPoint;
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using ::XCEngine::UI::UIPointerButton;
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using ::XCEngine::UI::UIRect;
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using Widgets::AppendUIEditorTreeViewBackground;
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using Widgets::AppendUIEditorTreeViewForeground;
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using Widgets::DoesUIEditorTreeViewItemHaveChildren;
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using Widgets::HitTestUIEditorTreeView;
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using Widgets::IsUIEditorTreeViewPointInside;
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using Widgets::UIEditorTreeViewHitTarget;
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using Widgets::UIEditorTreeViewHitTargetKind;
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using Widgets::UIEditorTreeViewInvalidIndex;
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constexpr std::string_view kHierarchyPanelId = "hierarchy";
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constexpr float kDragThreshold = 4.0f;
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constexpr UIColor kDragPreviewColor(0.82f, 0.82f, 0.82f, 0.55f);
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bool ContainsPoint(const UIRect& rect, const UIPoint& point) {
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return point.x >= rect.x &&
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point.x <= rect.x + rect.width &&
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point.y >= rect.y &&
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point.y <= rect.y + rect.height;
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}
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float ComputeSquaredDistance(const UIPoint& lhs, const UIPoint& rhs) {
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const float dx = lhs.x - rhs.x;
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const float dy = lhs.y - rhs.y;
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return dx * dx + dy * dy;
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}
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::XCEngine::UI::UITextureHandle ResolveGameObjectIcon(
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const ProductBuiltInIcons* icons) {
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return icons != nullptr
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? icons->Resolve(ProductBuiltInIconKind::GameObject)
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: ::XCEngine::UI::UITextureHandle {};
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}
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std::vector<UIInputEvent> FilterHierarchyInputEvents(
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const UIRect& bounds,
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const std::vector<UIInputEvent>& inputEvents,
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bool allowInteraction,
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bool panelActive,
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bool captureActive) {
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if (!allowInteraction && !captureActive) {
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return {};
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}
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std::vector<UIInputEvent> filteredEvents = {};
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filteredEvents.reserve(inputEvents.size());
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for (const UIInputEvent& event : inputEvents) {
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switch (event.type) {
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case UIInputEventType::PointerMove:
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case UIInputEventType::PointerButtonDown:
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case UIInputEventType::PointerButtonUp:
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case UIInputEventType::PointerWheel:
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if (captureActive || ContainsPoint(bounds, event.position)) {
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filteredEvents.push_back(event);
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}
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break;
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case UIInputEventType::PointerLeave:
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filteredEvents.push_back(event);
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break;
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case UIInputEventType::FocusGained:
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case UIInputEventType::FocusLost:
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if (panelActive || captureActive) {
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filteredEvents.push_back(event);
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}
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break;
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case UIInputEventType::KeyDown:
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case UIInputEventType::KeyUp:
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case UIInputEventType::Character:
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if (panelActive) {
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filteredEvents.push_back(event);
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}
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break;
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default:
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break;
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}
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}
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return filteredEvents;
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}
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const Widgets::UIEditorTreeViewItem* ResolveHitItem(
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const Widgets::UIEditorTreeViewLayout& layout,
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const std::vector<Widgets::UIEditorTreeViewItem>& items,
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const UIPoint& point,
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UIEditorTreeViewHitTarget* hitTargetOutput = nullptr) {
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const UIEditorTreeViewHitTarget hitTarget = HitTestUIEditorTreeView(layout, point);
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if (hitTargetOutput != nullptr) {
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*hitTargetOutput = hitTarget;
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}
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if (hitTarget.itemIndex >= items.size()) {
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return nullptr;
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}
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return &items[hitTarget.itemIndex];
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}
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std::size_t FindVisibleIndexForItemId(
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const Widgets::UIEditorTreeViewLayout& layout,
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const std::vector<Widgets::UIEditorTreeViewItem>& items,
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std::string_view itemId) {
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for (std::size_t visibleIndex = 0u; visibleIndex < layout.visibleItemIndices.size(); ++visibleIndex) {
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const std::size_t itemIndex = layout.visibleItemIndices[visibleIndex];
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if (itemIndex < items.size() && items[itemIndex].itemId == itemId) {
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return visibleIndex;
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}
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}
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return UIEditorTreeViewInvalidIndex;
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}
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} // namespace
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void ProductHierarchyPanel::Initialize() {
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m_model = ProductHierarchyModel::BuildDefault();
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RebuildItems();
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}
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void ProductHierarchyPanel::SetBuiltInIcons(const ProductBuiltInIcons* icons) {
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m_icons = icons;
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RebuildItems();
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}
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const UIEditorPanelContentHostPanelState* ProductHierarchyPanel::FindMountedHierarchyPanel(
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const UIEditorPanelContentHostFrame& contentHostFrame) const {
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for (const UIEditorPanelContentHostPanelState& panelState : contentHostFrame.panelStates) {
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if (panelState.panelId == kHierarchyPanelId && panelState.mounted) {
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return &panelState;
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}
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}
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return nullptr;
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}
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void ProductHierarchyPanel::ResetTransientState() {
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m_frameEvents.clear();
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m_dragState.requestPointerCapture = false;
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m_dragState.requestPointerRelease = false;
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}
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void ProductHierarchyPanel::RebuildItems() {
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const auto icon = ResolveGameObjectIcon(m_icons);
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const std::string previousSelection =
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m_selection.HasSelection() ? m_selection.GetSelectedId() : std::string();
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m_treeItems = m_model.BuildTreeItems(icon);
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m_expansion.Expand("player");
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m_expansion.Expand("environment");
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m_expansion.Expand("props");
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if (!previousSelection.empty() && m_model.ContainsNode(previousSelection)) {
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m_selection.SetSelection(previousSelection);
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return;
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}
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if (!m_treeItems.empty()) {
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m_selection.SetSelection(m_treeItems.front().itemId);
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}
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}
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void ProductHierarchyPanel::EmitSelectionEvent() {
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if (!m_selection.HasSelection()) {
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return;
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}
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const ProductHierarchyNode* node = m_model.FindNode(m_selection.GetSelectedId());
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if (node == nullptr) {
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return;
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}
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Event event = {};
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event.kind = EventKind::SelectionChanged;
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event.itemId = node->nodeId;
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event.label = node->label;
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m_frameEvents.push_back(std::move(event));
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}
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void ProductHierarchyPanel::EmitReparentEvent(
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EventKind kind,
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std::string itemId,
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std::string targetItemId) {
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Event event = {};
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event.kind = kind;
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event.itemId = std::move(itemId);
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event.targetItemId = std::move(targetItemId);
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if (const ProductHierarchyNode* node = m_model.FindNode(event.itemId); node != nullptr) {
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event.label = node->label;
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}
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m_frameEvents.push_back(std::move(event));
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}
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std::vector<UIInputEvent> ProductHierarchyPanel::BuildInteractionInputEvents(
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const std::vector<UIInputEvent>& inputEvents,
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const UIRect& bounds,
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bool allowInteraction,
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bool panelActive) const {
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const std::vector<UIInputEvent> rawEvents = FilterHierarchyInputEvents(
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bounds,
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inputEvents,
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allowInteraction,
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panelActive,
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HasActivePointerCapture());
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struct DragPreviewState {
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std::string armedItemId = {};
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UIPoint pressPosition = {};
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bool armed = false;
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bool dragging = false;
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};
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const Widgets::UIEditorTreeViewLayout layout =
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m_treeFrame.layout.bounds.width > 0.0f ? m_treeFrame.layout : Widgets::BuildUIEditorTreeViewLayout(
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bounds,
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m_treeItems,
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m_expansion,
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BuildProductTreeViewMetrics());
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DragPreviewState preview = {};
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preview.armed = m_dragState.armed;
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preview.armedItemId = m_dragState.armedItemId;
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preview.pressPosition = m_dragState.pressPosition;
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preview.dragging = m_dragState.dragging;
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std::vector<UIInputEvent> filteredEvents = {};
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filteredEvents.reserve(rawEvents.size());
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for (const UIInputEvent& event : rawEvents) {
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bool suppress = false;
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switch (event.type) {
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case UIInputEventType::PointerButtonDown:
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if (event.pointerButton == UIPointerButton::Left) {
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UIEditorTreeViewHitTarget hitTarget = {};
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const Widgets::UIEditorTreeViewItem* hitItem =
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ResolveHitItem(layout, m_treeItems, event.position, &hitTarget);
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if (hitItem != nullptr &&
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hitTarget.kind == UIEditorTreeViewHitTargetKind::Row) {
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preview.armed = true;
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preview.armedItemId = hitItem->itemId;
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preview.pressPosition = event.position;
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} else {
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preview.armed = false;
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preview.armedItemId.clear();
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}
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}
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if (preview.dragging) {
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suppress = true;
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}
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break;
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case UIInputEventType::PointerMove:
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if (preview.dragging) {
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suppress = true;
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break;
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}
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if (preview.armed &&
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ComputeSquaredDistance(event.position, preview.pressPosition) >=
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kDragThreshold * kDragThreshold) {
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preview.dragging = true;
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suppress = true;
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}
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break;
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case UIInputEventType::PointerButtonUp:
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if (event.pointerButton == UIPointerButton::Left) {
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if (preview.dragging) {
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suppress = true;
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preview.dragging = false;
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}
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preview.armed = false;
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preview.armedItemId.clear();
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} else if (preview.dragging) {
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suppress = true;
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}
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break;
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case UIInputEventType::PointerLeave:
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if (preview.dragging) {
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suppress = true;
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}
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break;
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case UIInputEventType::FocusLost:
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preview.armed = false;
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preview.dragging = false;
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preview.armedItemId.clear();
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break;
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default:
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break;
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}
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if (!suppress) {
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filteredEvents.push_back(event);
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}
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}
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return filteredEvents;
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}
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void ProductHierarchyPanel::ProcessDragAndFrameEvents(
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const std::vector<UIInputEvent>& inputEvents,
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const UIRect& bounds,
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bool allowInteraction,
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bool panelActive) {
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const std::vector<UIInputEvent> filteredEvents = FilterHierarchyInputEvents(
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bounds,
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inputEvents,
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allowInteraction,
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panelActive,
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HasActivePointerCapture());
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if (m_treeFrame.result.selectionChanged) {
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EmitSelectionEvent();
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}
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if (m_treeFrame.result.renameRequested &&
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!m_treeFrame.result.renameItemId.empty()) {
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Event event = {};
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event.kind = EventKind::RenameRequested;
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event.itemId = m_treeFrame.result.renameItemId;
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if (const ProductHierarchyNode* node = m_model.FindNode(event.itemId); node != nullptr) {
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event.label = node->label;
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}
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m_frameEvents.push_back(std::move(event));
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}
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for (const UIInputEvent& event : filteredEvents) {
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switch (event.type) {
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case UIInputEventType::PointerButtonDown:
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if (event.pointerButton == UIPointerButton::Left) {
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UIEditorTreeViewHitTarget hitTarget = {};
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const Widgets::UIEditorTreeViewItem* hitItem =
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ResolveHitItem(m_treeFrame.layout, m_treeItems, event.position, &hitTarget);
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if (hitItem != nullptr &&
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hitTarget.kind == UIEditorTreeViewHitTargetKind::Row) {
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m_dragState.armed = true;
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m_dragState.armedItemId = hitItem->itemId;
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m_dragState.pressPosition = event.position;
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} else {
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m_dragState.armed = false;
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m_dragState.armedItemId.clear();
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}
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}
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break;
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case UIInputEventType::PointerMove:
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if (m_dragState.armed && !m_dragState.dragging &&
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ComputeSquaredDistance(event.position, m_dragState.pressPosition) >=
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kDragThreshold * kDragThreshold) {
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m_dragState.dragging = !m_dragState.armedItemId.empty();
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m_dragState.draggedItemId = m_dragState.armedItemId;
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m_dragState.dropTargetItemId.clear();
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m_dragState.dropToRoot = false;
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m_dragState.validDropTarget = false;
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if (m_dragState.dragging) {
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m_dragState.requestPointerCapture = true;
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if (!m_selection.IsSelected(m_dragState.draggedItemId)) {
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m_selection.SetSelection(m_dragState.draggedItemId);
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EmitSelectionEvent();
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}
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}
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}
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if (m_dragState.dragging) {
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UIEditorTreeViewHitTarget hitTarget = {};
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const Widgets::UIEditorTreeViewItem* hitItem =
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ResolveHitItem(m_treeFrame.layout, m_treeItems, event.position, &hitTarget);
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m_dragState.dropTargetItemId.clear();
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m_dragState.dropToRoot = false;
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m_dragState.validDropTarget = false;
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if (hitItem != nullptr &&
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(hitTarget.kind == UIEditorTreeViewHitTargetKind::Row ||
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hitTarget.kind == UIEditorTreeViewHitTargetKind::Disclosure)) {
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m_dragState.dropTargetItemId = hitItem->itemId;
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m_dragState.validDropTarget =
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m_model.CanReparent(
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m_dragState.draggedItemId,
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m_dragState.dropTargetItemId);
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} else if (ContainsPoint(bounds, event.position)) {
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m_dragState.dropToRoot = true;
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m_dragState.validDropTarget =
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m_model.GetParentId(m_dragState.draggedItemId).has_value();
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}
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}
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break;
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case UIInputEventType::PointerButtonUp:
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if (event.pointerButton != UIPointerButton::Left) {
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break;
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}
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if (m_dragState.dragging) {
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if (m_dragState.validDropTarget) {
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const std::string draggedItemId = m_dragState.draggedItemId;
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const std::string dropTargetItemId = m_dragState.dropTargetItemId;
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const bool changed =
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m_dragState.dropToRoot
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? m_model.MoveToRoot(draggedItemId)
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: m_model.Reparent(draggedItemId, dropTargetItemId);
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if (changed) {
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RebuildItems();
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EmitReparentEvent(
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m_dragState.dropToRoot ? EventKind::MovedToRoot : EventKind::Reparented,
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draggedItemId,
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dropTargetItemId);
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}
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}
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m_dragState.armed = false;
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m_dragState.dragging = false;
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m_dragState.armedItemId.clear();
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m_dragState.draggedItemId.clear();
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m_dragState.dropTargetItemId.clear();
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m_dragState.dropToRoot = false;
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m_dragState.validDropTarget = false;
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m_dragState.requestPointerRelease = true;
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} else {
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m_dragState.armed = false;
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m_dragState.armedItemId.clear();
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}
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break;
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case UIInputEventType::FocusLost:
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if (m_dragState.dragging) {
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m_dragState.requestPointerRelease = true;
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}
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m_dragState = {};
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break;
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default:
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break;
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}
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}
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}
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void ProductHierarchyPanel::Update(
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const UIEditorPanelContentHostFrame& contentHostFrame,
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const std::vector<UIInputEvent>& inputEvents,
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bool allowInteraction,
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bool panelActive) {
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ResetTransientState();
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const UIEditorPanelContentHostPanelState* panelState =
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FindMountedHierarchyPanel(contentHostFrame);
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if (panelState == nullptr) {
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m_visible = false;
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m_treeFrame = {};
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m_dragState = {};
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return;
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}
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if (m_treeItems.empty()) {
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RebuildItems();
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}
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m_visible = true;
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const std::vector<UIInputEvent> interactionEvents =
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BuildInteractionInputEvents(
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inputEvents,
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panelState->bounds,
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allowInteraction,
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panelActive);
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m_treeFrame = UpdateUIEditorTreeViewInteraction(
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m_treeInteractionState,
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m_selection,
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m_expansion,
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panelState->bounds,
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m_treeItems,
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interactionEvents,
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BuildProductTreeViewMetrics());
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ProcessDragAndFrameEvents(
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inputEvents,
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panelState->bounds,
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allowInteraction,
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panelActive);
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}
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void ProductHierarchyPanel::Append(UIDrawList& drawList) const {
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if (!m_visible || m_treeFrame.layout.bounds.width <= 0.0f || m_treeFrame.layout.bounds.height <= 0.0f) {
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return;
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}
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const Widgets::UIEditorTreeViewPalette palette = BuildProductTreeViewPalette();
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const Widgets::UIEditorTreeViewMetrics metrics = BuildProductTreeViewMetrics();
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AppendUIEditorTreeViewBackground(
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drawList,
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m_treeFrame.layout,
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m_treeItems,
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m_selection,
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m_treeInteractionState.treeViewState,
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palette,
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metrics);
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AppendUIEditorTreeViewForeground(
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drawList,
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m_treeFrame.layout,
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m_treeItems,
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palette,
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metrics);
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if (!m_dragState.dragging || !m_dragState.validDropTarget) {
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return;
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}
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if (m_dragState.dropToRoot) {
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drawList.AddRectOutline(
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m_treeFrame.layout.bounds,
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kDragPreviewColor,
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1.0f,
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0.0f);
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return;
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}
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|
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const std::size_t visibleIndex = FindVisibleIndexForItemId(
|
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m_treeFrame.layout,
|
|
m_treeItems,
|
|
m_dragState.dropTargetItemId);
|
|
if (visibleIndex == UIEditorTreeViewInvalidIndex ||
|
|
visibleIndex >= m_treeFrame.layout.rowRects.size()) {
|
|
return;
|
|
}
|
|
|
|
drawList.AddRectOutline(
|
|
m_treeFrame.layout.rowRects[visibleIndex],
|
|
kDragPreviewColor,
|
|
1.0f,
|
|
0.0f);
|
|
}
|
|
|
|
bool ProductHierarchyPanel::WantsHostPointerCapture() const {
|
|
return m_dragState.requestPointerCapture;
|
|
}
|
|
|
|
bool ProductHierarchyPanel::WantsHostPointerRelease() const {
|
|
return m_dragState.requestPointerRelease;
|
|
}
|
|
|
|
bool ProductHierarchyPanel::HasActivePointerCapture() const {
|
|
return m_dragState.dragging;
|
|
}
|
|
|
|
const std::vector<ProductHierarchyPanel::Event>& ProductHierarchyPanel::GetFrameEvents() const {
|
|
return m_frameEvents;
|
|
}
|
|
|
|
} // namespace XCEngine::UI::Editor::App
|