forked from nique_372/GrapichsByLeo
105 lines
8 KiB
MQL5
105 lines
8 KiB
MQL5
//+------------------------------------------------------------------+
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//| ARGBGenerator.mqh |
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//| Copyright 2025, Niquel Mendoza. |
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//| https://www.mql5.com/es/users/nique_372/news |
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2025, Niquel Mendoza."
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#property link "https://www.mql5.com/es/users/nique_372/news"
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#property strict
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#ifndef GRAPICHSBYLEO_GENERAL_ARGB_GENERATOR_MQH
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#define GRAPICHSBYLEO_GENERAL_ARGB_GENERATOR_MQH
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//+------------------------------------------------------------------+
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//| Class CColorGeneratorArgb |
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//| Usage: class to generate ARGB colors for charts or objects |
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//+------------------------------------------------------------------+
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class CColorGeneratorArgb
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{
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private:
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int m_index; // Current index
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bool m_generate; // Flag to generate new colors
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uint m_current_palette[20]; // Working color palette (ARGB)
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static const uint s_default_palette[20]; // Default base palette (ARGB)
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uchar m_alpha; // Transparency (0–255)
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public:
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CColorGeneratorArgb();
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//--- Gets the next ARGB color
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uint Next(void);
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//--- Resets the generator to the original palette
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void Reset(void);
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//--- Set alpha manually (0 = transparent, 255 = opaque)
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void SetAlpha(uchar alpha);
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};
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//+------------------------------------------------------------------+
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//| Default palette (20 harmonious colors, ARGB format) |
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//+------------------------------------------------------------------+
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const uint CColorGeneratorArgb::s_default_palette[20] =
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{
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0xFF3366CC, 0xFFDC3912, 0xFFFF9900, 0xFF109618, 0xFF990099,
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0xFF3B3EAC, 0xFF0099C6, 0xFFDD4477, 0xFF66AA00, 0xFFB82E2E,
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0xFF316395, 0xFF994499, 0xFF22AA99, 0xFFAAAA11, 0xFF6633CC,
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0xFFE67300, 0xFF8B0707, 0xFF329262, 0xFF5574A6, 0xFF3B3EAC
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};
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//+------------------------------------------------------------------+
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//| Constructor |
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//+------------------------------------------------------------------+
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CColorGeneratorArgb::CColorGeneratorArgb():
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m_index(0),
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m_generate(false),
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m_alpha(255)
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{
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ArrayCopy(m_current_palette, s_default_palette);
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}
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//+------------------------------------------------------------------+
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//| Generate or retrieve next color |
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//+------------------------------------------------------------------+
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uint CColorGeneratorArgb::Next(void)
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{
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if(m_index >= 20)
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{
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m_index = 0;
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if(!m_generate)
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m_generate = true;
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}
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if(m_generate)
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{
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// Simple XOR-based variation to get a new tone
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uint base1 = m_current_palette[m_index];
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uint base2 = (m_index == 19 ? m_current_palette[0] : m_current_palette[m_index + 1]);
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m_current_palette[m_index] = (base1 ^ base2) | (uint(m_alpha) << 24);
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}
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// Apply alpha to ensure all colors follow current transparency
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uint clr = (m_current_palette[m_index++] & 0x00FFFFFF) | (uint(m_alpha) << 24);
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return clr;
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}
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//+------------------------------------------------------------------+
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//| Reset the generator |
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//+------------------------------------------------------------------+
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void CColorGeneratorArgb::Reset(void)
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{
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m_index = 0;
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m_generate = false;
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ArrayCopy(m_current_palette, s_default_palette);
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}
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//+------------------------------------------------------------------+
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//| Set alpha transparency |
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//+------------------------------------------------------------------+
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void CColorGeneratorArgb::SetAlpha(uchar alpha)
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{
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m_alpha = alpha;
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}
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//---
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#endif // GRAPICHSBYLEO_GENERAL_ARGB_GENERATOR_MQH
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