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# Summary
This PR introduces a reusable Tab Bar component and combines the Recent
Books and File Browser into a unified tabbed page called "My Library"
accessible from the Home screen.
## Features
### New Tab Bar Component
A flexible, reusable tab bar component added to `ScreenComponents` that
can be used throughout the application.
### New Scroll Indicator Component
A page position indicator for lists that span multiple pages.
**Features:**
- Up/down arrow indicators
- Current page fraction display (e.g., "1/3")
- Only renders when content spans multiple pages
### My Library Activity
A new unified view combining Recent Books and File Browser into a single
tabbed page.
**Tabs:**
- **Recent** - Shows recently opened books
- **Files** - Browse SD card directory structure
**Navigation:**
- Up/Down or Left/Right: Navigate through list items
- Left/Right (when first item selected): Switch between tabs
- Confirm: Open selected book or enter directory
- Back: Go up directory (Files tab) or return home
- Long press Back: Jump to root directory (Files tab)
**UI Elements:**
- Tab bar with selection indicator
- Scroll/page indicator on right side
- Side button hints (up/down arrows)
- Dynamic bottom button labels ("BACK" in subdirectories, "HOME" at
root)
## Tab Bar Usage
The tab bar component is designed to be reusable across different
activities. Here's how to use it:
### Basic Example
```cpp
#include "ScreenComponents.h"
void MyActivity::render() const {
renderer.clearScreen();
// Define tabs with labels and selection state
std::vector<TabInfo> tabs = {
{"Tab One", currentTab == 0}, // Selected when currentTab is 0
{"Tab Two", currentTab == 1}, // Selected when currentTab is 1
{"Tab Three", currentTab == 2} // Selected when currentTab is 2
};
// Draw tab bar at Y position 15, returns height of the tab bar
int tabBarHeight = ScreenComponents::drawTabBar(renderer, 15, tabs);
// Position your content below the tab bar
int contentStartY = 15 + tabBarHeight + 10; // Add some padding
// Draw content based on selected tab
if (currentTab == 0) {
renderTabOneContent(contentStartY);
} else if (currentTab == 1) {
renderTabTwoContent(contentStartY);
} else {
renderTabThreeContent(contentStartY);
}
renderer.displayBuffer();
}
```
Video Demo: https://share.cleanshot.com/P6NBncFS
<img width="250"
src="https://github.com/user-attachments/assets/07de4418-968e-4a88-9b42-ac5f53d8a832"
/>
<img width="250"
src="https://github.com/user-attachments/assets/e40201ed-dcc8-4568-b008-cd2bf13ebb2a"
/>
<img width="250"
src="https://github.com/user-attachments/assets/73db269f-e629-4696-b8ca-0b8443451a05"
/>
---------
Co-authored-by: Dave Allie <dave@daveallie.com>
40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <vector>
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class GfxRenderer;
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struct TabInfo {
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const char* label;
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bool selected;
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};
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class ScreenComponents {
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public:
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static void drawBattery(const GfxRenderer& renderer, int left, int top, bool showPercentage = true);
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// Draw a horizontal tab bar with underline indicator for selected tab
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// Returns the height of the tab bar (for positioning content below)
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static int drawTabBar(const GfxRenderer& renderer, int y, const std::vector<TabInfo>& tabs);
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// Draw a scroll/page indicator on the right side of the screen
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// Shows up/down arrows and current page fraction (e.g., "1/3")
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static void drawScrollIndicator(const GfxRenderer& renderer, int currentPage, int totalPages, int contentTop,
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int contentHeight);
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/**
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* Draw a progress bar with percentage text.
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* @param renderer The graphics renderer
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* @param x Left position of the bar
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* @param y Top position of the bar
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* @param width Width of the bar
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* @param height Height of the bar
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* @param current Current progress value
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* @param total Total value for 100% progress
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*/
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static void drawProgressBar(const GfxRenderer& renderer, int x, int y, int width, int height, size_t current,
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size_t total);
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};
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