41 lines
956 B
C++
41 lines
956 B
C++
#include "common/ScrollBar.h"
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ScrollBar::ScrollBar(const menu_options_t *options, const size_t x, const size_t y, const size_t width,
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const size_t height)
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: Widget(options->u8g2), m_x(x), m_y(y), m_width(width), m_height(height), m_value(0), m_max(0), m_min(0),
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m_thumbHeight(0), m_thumbY(0)
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{
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}
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void ScrollBar::render()
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{
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if (m_max <= 1)
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{
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return;
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}
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for (size_t y = m_y; y < m_y + m_height; y += 2)
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{
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u8g2_DrawPixel(u8g2, m_x, y);
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}
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u8g2_DrawBox(u8g2, u8g2->width - 4, m_thumbY, 3, m_thumbHeight);
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}
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void ScrollBar::refresh(const size_t value, const size_t max, const size_t min)
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{
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m_value = value;
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m_max = max;
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m_min = min;
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if (m_max <= 1)
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{
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return;
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}
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m_thumbHeight = std::max(m_height / 4, static_cast<size_t>(3));
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const size_t trackLength = m_height - m_thumbHeight;
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m_thumbY = m_y + (m_value * trackLength) / (m_max - 1);
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} |