globals.bas

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Attribute VB_Name = "Globals"
Option Explicit

'Public AlertCount As Integer

'Private Const PI    As Double = 3.14159265358979
'Private Const RADS  As Double = PI / 180    '<Degrees> * RADS = radians

'Private Type PointAPI   'API Point structure
'    X   As Long
'    Y   As Long
'End Type

'Private Declare Function Polygon Lib "gdi32" (ByVal hDC As Long, lpPoint As PointAPI, ByVal nCount As Long) As Long

'Public Sub DrawAngle1(picDraw As PictureBox, ByVal fAngle As Single)

'Dim iSize       As Integer
'Dim iFillStyle  As Integer
'Dim lFillColor  As Long
'Dim lForeColor  As Long
'Dim lRet        As Long
'Dim uaPts(3)    As PointAPI

    'Size arrow to best fit picDraw at any angle
'    iSize = IIf(picDraw.ScaleHeight < picDraw.ScaleWidth, Int(picDraw.ScaleHeight / PI), Int(picDraw.ScaleWidth / PI))
    
    'Setup the 4 points of the arrow using the first point
    'as the center and the other points offset from the center.
'    uaPts(0).X = picDraw.ScaleWidth / 2
'    uaPts(0).Y = picDraw.ScaleHeight / 2
'    uaPts(1).X = uaPts(0).X - iSize
'    uaPts(1).Y = uaPts(0).Y - iSize
'    uaPts(2).X = uaPts(0).X + iSize
'    uaPts(2).Y = uaPts(0).Y
'    uaPts(3).X = uaPts(0).X - iSize
'    uaPts(3).Y = uaPts(0).Y + iSize

    'Rotate the arrow to the correct angle
'    Call RotatePoints(uaPts(0), uaPts, fAngle)
    
    'Save picDraw settings
'    iFillStyle = picDraw.FillStyle
'    lFillColor = picDraw.FillColor
'    lForeColor = picDraw.ForeColor
    
    'Setup picDraw to fill the arrow
'    picDraw.FillStyle = vbFSSolid   'Solid Fill
'    picDraw.FillColor = &HFFFFFF    'Inside = White
'    picDraw.ForeColor = &H0&        'Border = Black
    
    'Draw the filled arrow
'    lRet = Polygon(picDraw.hDC, uaPts(0), 4)
    
    'Restore picDraw settings
'    picDraw.FillStyle = iFillStyle
'    picDraw.FillColor = lFillColor
'    picDraw.ForeColor = lForeColor

    '释放内存
'    Erase uaPts
    
'End Sub


'Private Sub RotatePoints1(uAxisPt As PointAPI, uRotatePts() As PointAPI, fDegrees As Single)
'Rotates an array of PointAPI points around a center point by fDegrees

'    Dim lIdx        As Long
'    Dim fDX         As Single
'    Dim fDY         As Single
'    Dim fRadians    As Single

'    fRadians = fDegrees * RADS
    
'    For lIdx = 0 To UBound(uRotatePts)
'        fDX = uRotatePts(lIdx).X - uAxisPt.X
'        fDY = uRotatePts(lIdx).Y - uAxisPt.Y
'        uRotatePts(lIdx).X = uAxisPt.X + ((fDX * Cos(fRadians)) + (fDY * Sin(fRadians)))
'        uRotatePts(lIdx).Y = uAxisPt.Y + -((fDX * Sin(fRadians)) - (fDY * Cos(fRadians)))
'    Next lIdx
    
'End Sub