Matt Corcoran
54 lines
1.9 KiB
Plaintext
54 lines
1.9 KiB
Plaintext
//+------------------------------------------------------------------+
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//| ChartUtils.mqh |
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//| Utilities for drawing and annotating charts |
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//| |
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//| 2025 xMattC (github.com/xMattC) |
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//+------------------------------------------------------------------+
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#property copyright "2025 xMattC (github.com/xMattC)"
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#property link "https://github.com/xMattC"
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#property version "1.00"
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#include <Object.mqh>
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class ChartUtils : public CObject {
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public:
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void draw_line(double value, string name, color clr = clrBlack);
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};
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// ---------------------------------------------------------------------
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// Draws or updates a horizontal line on the chart at the given price level.
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//
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// Parameters:
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// - value : Price level at which to draw the line.
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// - name : Unique name for the line object.
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// - clr : Line color (default is black).
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//
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// Logic:
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// - If the object doesn't exist, it creates a new horizontal line.
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// - If the object exists, it moves it to the new price level.
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// - Calls ChartRedraw to update the chart visually.
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// ---------------------------------------------------------------------
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void ChartUtils::draw_line(double value, string name, color clr) {
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if (ObjectFind(0, name) < 0) {
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ResetLastError();
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if (!ObjectCreate(0, name, OBJ_HLINE, 0, 0, value)) {
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Print(__FUNCTION__, ": failed to create a horizontal line! Error code = ", GetLastError());
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return;
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}
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ObjectSetInteger(0, name, OBJPROP_COLOR, clr);
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ObjectSetInteger(0, name, OBJPROP_STYLE, STYLE_SOLID);
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ObjectSetInteger(0, name, OBJPROP_WIDTH, 1);
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}
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ResetLastError();
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if (!ObjectMove(0, name, 0, 0, value)) {
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Print(__FUNCTION__, ": failed to move the horizontal line! Error code = ", GetLastError());
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return;
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}
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ChartRedraw();
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}
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