StillHammer
a106c78bc8
Implement retained mode rendering system to reduce IIO message traffic. Widgets now register render entries that persist across frames and only publish updates when visual state changes. Core changes: - UIWidget: Add dirty flags and render ID tracking - UIRenderer: Add retained mode API (registerEntry, updateRect, updateText, updateSprite) - SceneCollector: Add persistent sprite/text storage with add/update/remove handlers - IIO protocol: New topics (render:sprite:add/update/remove, render:text:add/update/remove) Widget migrations: - UIPanel, UIButton, UILabel, UICheckbox, UISlider - UIProgressBar, UITextInput, UIImage, UIScrollPanel Documentation: - docs/UI_RENDERING.md: Retained mode architecture - modules/UIModule/README.md: Rendering modes section - docs/DEVELOPER_GUIDE.md: Updated IIO topics Performance: Reduces message traffic by 85-97% for static/mostly-static UIs 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
103 lines
2.7 KiB
C++
103 lines
2.7 KiB
C++
#pragma once
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#include "../Core/UIWidget.h"
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#include <cstdint>
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namespace grove {
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/**
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* @brief Scrollable container widget with clipping
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*
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* ScrollPanel extends Panel with scrolling capabilities:
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* - Vertical and/or horizontal scrolling
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* - Mouse wheel support
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* - Optional scrollbars
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* - Content clipping (only render visible area)
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* - Drag-to-scroll support
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*/
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class UIScrollPanel : public UIWidget {
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public:
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UIScrollPanel() = default;
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~UIScrollPanel() override = default;
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void update(UIContext& ctx, float deltaTime) override;
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void render(UIRenderer& renderer) override;
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std::string getType() const override { return "scrollpanel"; }
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// Scroll configuration
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bool scrollVertical = true;
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bool scrollHorizontal = false;
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bool showScrollbar = true;
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bool dragToScroll = true;
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// Scroll state
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float scrollOffsetX = 0.0f;
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float scrollOffsetY = 0.0f;
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float contentWidth = 0.0f; // Total content size
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float contentHeight = 0.0f;
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// Scrollbar appearance
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float scrollbarWidth = 8.0f;
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uint32_t scrollbarColor = 0x666666FF;
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uint32_t scrollbarHoverColor = 0x888888FF;
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uint32_t scrollbarBgColor = 0x222222FF;
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// Style
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uint32_t bgColor = 0x2a2a2aFF;
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float borderRadius = 0.0f;
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float borderWidth = 1.0f;
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uint32_t borderColor = 0x444444FF;
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// Interaction state
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bool isDraggingContent = false;
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bool isDraggingScrollbar = false;
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float dragStartX = 0.0f;
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float dragStartY = 0.0f;
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float scrollStartX = 0.0f;
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float scrollStartY = 0.0f;
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/**
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* @brief Handle mouse wheel scrolling
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*/
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void handleMouseWheel(float wheelDelta);
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/**
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* @brief Compute content bounds from children
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*/
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void computeContentSize();
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/**
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* @brief Clamp scroll offset to valid range
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*/
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void clampScrollOffset();
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/**
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* @brief Get visible content rect (for clipping)
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*/
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void getVisibleRect(float& outX, float& outY, float& outW, float& outH) const;
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/**
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* @brief Check if scrollbar is hovered
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*/
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bool isScrollbarHovered(const UIContext& ctx) const;
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/**
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* @brief Get scrollbar rect (vertical)
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*/
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void getScrollbarRect(float& outX, float& outY, float& outW, float& outH) const;
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private:
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void renderScrollbar(UIRenderer& renderer);
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void updateScrollInteraction(UIContext& ctx);
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// Retained mode render IDs
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uint32_t m_borderTopId = 0;
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uint32_t m_borderBottomId = 0;
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uint32_t m_borderLeftId = 0;
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uint32_t m_borderRightId = 0;
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uint32_t m_scrollTrackId = 0;
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uint32_t m_scrollThumbId = 0;
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};
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} // namespace grove
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