document some editor constants
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reference.md
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reference.md
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@ -231,6 +231,25 @@ locations in the widget are `cursor1` describing where text is inserted or
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deleted and `screen_top1` which specifies how far down the lines is currently
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deleted and `screen_top1` which specifies how far down the lines is currently
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visible on screen.
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visible on screen.
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Some constants that affect editor behavior:
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* `Margin_top`, `Margin_left`, `Margin_right` are integers in pixel units that
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affect where the editor is drawn on window (it always extends to bottom of
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window as needed)
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* `Drawing_padding_top` and `Drawing_padding_bottom` affect spacing around
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drawings.
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* Various color constants are represented as tables with r/g/b keys:
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* `Text_color`, `Cursor_color`, `Highlight_color` for drawing text.
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* `Stroke_color`, `Current_stroke_color` for line drawings.
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* `Icon_color` affects the color of the little mode icon on the top right of
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a drawing.
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* `Current_name_background_color` manages the color when naming points using
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`ctrl+n`.
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* `Focus_stroke_color` affects the color of a point or line when you hover
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over it.
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* `Help_color` and `Help_background_color` affect the color of online help
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within line drawings.
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### clickable buttons
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### clickable buttons
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There's a facility for rendering buttons and responding to events when they're
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There's a facility for rendering buttons and responding to events when they're
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