All gauge elements, except text labels and images, have the following properties in the Appearance category: Border (C1GaugeBorder), Filling (C1GaugeFilling), Gradient (C1GaugeGradient).
Border specifies the color, thickness, and style of the pen that draws the element border. The default border color is the same as ForeColor of the owner C1Gauge control. To hide the border set its LineStyle property to None. To display a semitransparent border specify the value of alpha when setting the Color property, for example: "128, 0, 0, 0".
The Filling property specifies how to draw the interior. BrushType is the main property of the C1GaugeFilling class. The filling color is defined by a pair of properties: Color and Opacity. Some brushes use the second pair of color properties as well: Color2, Opacity2. You may switch these pairs using the SwapColors property. The following are possible values for the BrushType property:
• None – the element has no filling.
• SolidColor – the element is filled with a single color specified by the Color property. If this property is empty the BackColor property of the owner C1Gauge control is used instead.
• Hatch – fills the element with one of the predefined hatch styles (selected by the HatchStyle property) using a foreground color (Color) and a background color (Color2).
• Texture – fills the interior of an element using an image provided in the TextureImage property. The wrap mode for the texture brush is specified by the WrapMode property.
• Gradient – the interior is filled with a gradient that is defined by the Gradient property (see below).
The Gradient property provides a few settings for drawing a gradient. The Direction property sets the direction of the gradient orientation line, such as Vertical, Radial, and so on. The RadialInner value draws the gradient that is inscribed into the owner element. The RadialOuter value draws the circumscribed gradient. The Falloff property allows using the bell-shaped or triangular gradient effects. The TranslateX and TranslateY properties allow moving the area filled with the gradient by the specified relative amount, then the ScaleX and ScaleY properties scale this area, if necessary.
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