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Class: CGDIFloodFill
Class that fills an area using Windows API calls.
The Windows API FloodFill function fills a region of the form or picture which is bounded by a solid line of pixels of the same color. It is often used to "color in" parts of the form. The routines in this class allow you to use the Windows API FloodFill function.
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Procedure Name
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Type
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Description
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(Declarations)
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Declarations
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Declarations and private variables for the CGDIFloodFill class
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BrushStyle
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Property
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Sets the current style used to fill the area.
The value of this property should be set to one of the Windows API Brush Style constants (BS_SOLID, BS_HOLLOW, BS_HATCHED etc.) which are exposed as EnumFloodFillBrushStyles constants in this class.
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FillColor
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Property
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Gets the current value of the color used for the flood fill
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FillStyle
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Property
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Gets the current value of the style used for the flood fill.
The value should be one of 0-FLOODFILLBORDER, or 1-FLOODFILLSURFACE (see the declarations sections of this class for these constants.)
If FillStyle is FLOODFILLBORDER, Windows assumes that the area to be filled is completely bounded by the color specified by the FillColor property. The function begins filling at the point specified by the X and Y properties and continues in all directions until it reaches the boundary.
If FillStyle is FLOODFILLSURFACE, Windows assumes that the area to be filled is a single color. The function begins to fill the area at the point specified by the X and Y properties, and continues in all directions, filling all adjacent regions containing the color specified by FillColor.
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HatchStyle
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Property
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Sets the current value of the style used for the flood fill when the BrushStyle is set to hatched
The value of this property should be set to one of the Windows API Hatch Style constants (HS_HORIZONTAL, HS_BDIAGONAL, HS_CROSS etc.) which are exposed as EnumFloodFillHatchStyles constants in this class. ' Params : eValue Style used for the flood fill as defined by the EnumFloodFillHatchStyles enumerated type
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x
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Property
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Gets the location of the horizontal starting point for the flood fill
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Y
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Property
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Gets the location of the vertical starting point for the flood fill
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Class_Initialize
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Initialize
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Set initial values to defaults which may be overridden with property settings
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FloodFill
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Method
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Fills an area with a specified color
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TranslateVBColor
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Private
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Translates VB color constants for system colors into GDI equivalents.
VB color constants, such as vbRed, or vbBlue, or values returned using the QBColor() or RGB() functions, can be used directly for the color values used with Windows API calls. However, the VB color constants for system colors (vbButtonFace, vb3DShadow etc.) do not map correctly to those expected by Windows. This wrapper function accepts either form of constant, and translates the value, if necessary, into the equivalent value expected by the Windows GDI subsystem.
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