#include "fbgfx.bi"
#define rect 4

Windowtitle "Mouse events"
Screen 19,32
Dim Shared As Integer xres, yres
Screeninfo xres, yres

Type box
    As Single x, y, z
    As String caption
    As Uinteger textcol, boxcol
End Type

Dim Shared As box label(rect,1)
Dim Shared As box button(rect,1)
Dim Shared As Boolean flag
Dim Shared As fb.event e
Dim As Uinteger background = Rgb(100,100,100)

Sub thickline(x1 As Double, y1 As Double, x2 As Double, y2 As Double,_
    thickness As Double, colour As Uinteger, im As Any Pointer = 0)
    Dim p As Uinteger = Rgb(255, 255, 254)
    If thickness < 2 Then
        Line(x1,y1)-(x2,y2), colour
    Else
        Dim As Double h = Sqr((x2-x1)^2+(y2-y1)^2), s = (y1-y2)/h, c = (x2-x1)/h
        For x As Integer = 1 To 2
            Line im,(x1+s*thickness/2,y1+c*thickness/2)-(x2+s*thickness/2,y2+c*thickness/2),p
            Line im,(x1-s*thickness/2,y1-c*thickness/2)-(x2-s*thickness/2,y2-c*thickness/2),p
            Line im,(x1+s*thickness/2,y1+c*thickness/2)-(x1-s*thickness/2,y1-c*thickness/2),p
            Line im,(x2+s*thickness/2,y2+c*thickness/2)-(x2-s*thickness/2,y2-c*thickness/2),p
            Paint im,((x1+x2)/2, (y1+y2)/2), p, p
            p = colour
        Next x
    End If
End Sub

Function inbox(p1() As box, p2 As box) As Integer
    Type pt2d : As Single x, y : End Type
    Type ln2d : As pt2d v1, v2 : End Type
    #macro isleft(L,p)
        -Sgn((L.v1.x-L.v2.x)*(p.y-L.v2.y) - (p.x-L.v2.x)*(L.v1.y-L.v2.y))
    #endmacro
    Dim As Single n1 = p1(rect,0).z
    Dim As Integer index, nextindex
    Dim send As ln2d
    Dim As Integer n, wn = 0
    For n = 1 To 4
        index = n Mod 5 : nextindex = (n+1) Mod 5
        If nextindex = 0 Then nextindex = 1
        send.v1.x = p1(index,n1).x : send.v2.x = p1(nextindex,n1).x
        send.v1.y = p1(index,n1).y : send.v2.y = p1(nextindex,n1).y
        If p1(index,n1).y <= p2.y Then
            If p1(nextindex,n1).y > p2.y Then
                If isleft(send,p2) > 0 Then wn += 1
            End If
        Else
            If p1(nextindex,n1).y <= p2.y Then
                If isleft(send,p2) < 0 Then wn -= 1
            End If
        End If
    Next n
    Return wn
End Function

Sub draw_box(p() As box, col As Uinteger, pnt As String = "paint", im As Any Pointer = 0)
    Dim As Integer index, nextindex
    Dim As Single n1 = p(rect,0).z
    Dim As Double xc, yc
    For n As Integer = 1 To 4
        xc += p(n,n1).x : yc += p(n,n1).y
        index = n Mod 5 : nextindex = (n+1) Mod 5
        If nextindex = 0 Then nextindex = 1
        thickline(p(index,n1).x,p(index,n1).y, p(nextindex,n1).x,p(nextindex,n1).y,4,col,im)
    Next n
    xc /= Ubound(p) : yc /= Ubound(p)
    If pnt = "paint" Then Paint(xc,yc), col, col
End Sub

Sub highlightbox(box() As box, mp As box, col As Uinteger)
    box(rect,0).z = 1
    If inbox(box(),mp) Then draw_box(box(),col,"dont_paint")
End Sub

Sub checkbox(box() As box,mp As box)
    flag = True
    label(rect,1).caption = box(rect,1).caption
    label(rect,1).textcol = box(rect,1).textcol
    label(rect,1).boxcol  = box(rect,1).boxcol
End Sub

Sub drawbox(x As Integer, y As Integer, box()As box, boxlength As Integer, _
    boxheight As Integer, col As Uinteger, highlight As Uinteger, caption As String)
    Dim As box startpoint
    startpoint.x = x : startpoint.y = y
    Dim As Integer mmx, mmy
    Getmouse mmx, mmy
    Dim As box mouse
    mouse.x = mmx : mouse.y = mmy
    box(rect,1).boxcol = col
    box(rect,1).caption = caption
    Dim As Uinteger outline, count = 1
    outline = Rgb(255,255,255)
    For x As Integer = 1 To 4
        Select Case x
        Case 1
            box(1,count).x = startpoint.x
            box(1,count).y = startpoint.y
        Case 2
            box(2,count).x = box(1,count).x + boxlength
            box(2,count).y = box(1,count).y
        Case 3
            box(3,count).x = box(2,count).x
            box(3,count).y = box(2,count).y + boxheight
        Case 4
            box(4,count).x = box(3,count).x - boxlength
            box(4,count).y = box(3,count).y
        End Select
    Next x
    box(rect,0).z = 1
    draw_box(box(),col)
    draw_box(box(),outline,"nopaint")
    If inbox(box(),mouse) Then
        highlightbox(box(),mouse,highlight)
        If (Screenevent(@e)) Then
            If e.type = fb.EVENT_MOUSE_BUTTON_PRESS Then checkbox(box(),mouse)
        End If
    End If
    Draw String(box(1,1).x+5,box(1,1).y+5), box(rect,1).caption,box(rect,1).textcol
End Sub

' ---------- Main Program ----------
Do
    Screenlock
    Cls
    Paint(0,0), background
    Draw String(300,50), "BUTTON CLICK TEST", Rgb(0,0,200)

    drawbox(100,100,button(),100,50,Rgb(200,200,0),Rgb(00,0,200),"Box 1")
    drawbox(100,200,button(),100,50,Rgb(200,0,190),Rgb(00,0,200),"Box 2")
    drawbox(100,300,button(),100,50,Rgb(0,200,190),Rgb(00,0,200),"Box 3")

    If flag Then drawbox(400,100,label(),250,250,label(rect,1).boxcol,Rgb(255,255,255),label(rect,1).caption)
    If (Screenevent(@e)) Then
        If e.type=13 Then End
    End If
    Screenunlock
    Sleep 1, 1
Loop Until Inkey = Chr(27)