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Rem
bbdoc: noddybox.gfxmenu
EndRem
Module noddybox.gfxmenu
ModuleInfo "Framework: Simple Graphical Menu"
ModuleInfo "Copyright: Public Domain"
ModuleInfo "Author: Ian Cowburn"
ModuleInfo "Version: $Revision$"
' $Id$
Strict
Import brl.linkedlist
Import brl.max2d
Rem
bbdoc: Allows a menu backdrop to be automatically processed. Derive a class from this to use.
EndRem
Type TGfxMenuBackdrop Abstract
Rem
bbdoc: Create a menu backdrop element.
returns: The created elemnt.
about: Notice that this is a method, rather than the usual function creator.
EndRem
Method Create:TGfxMenuBackdrop() Abstract
Rem
bbdoc: Called by the menu to update the backdrop.
EndRem
Method Update() Abstract
End Type
Rem
bbdoc: Defines a graphical menu.
EndRem
Type TGfxMenu
Field list:TList
Field bdrop:TList
Field mbdown:Int
Field r:Int
Field g:Int
Field b:Int
Field over_r:Int
Field over_g:Int
Field over_b:Int
Field fade:Int
Rem
bbdoc: Create a menu.
returns: The created menu.
about: @backdrop is the backdrop to create (null for no backdrop). @num is the number of backdrop items to create.
about: SetColor() is called with @r, @g and @b when the mouse is not over an item, overwise SetColor() is
about: called with @over_r, @over_g and @over_b when the item is active. @fade is the amount colours will alter as the
about: mouse hovers over buttons. Set this to 255 to make colour changes instant.
EndRem
Function Create:TGfxMenu(r:Int=164, g:Int=164, b:Int=164, over_r:Int=255, over_g:Int=255, over_b:Int=255, fade:Int=5, backdrop:TGfxMenuBackdrop=Null, num:Int=0)
Local menu:TGfxMenu=New TGfxMenu
menu.list=New TList
menu.bdrop=New TList
menu.mbdown=False
menu.r=r
menu.g=g
menu.b=b
menu.over_r=over_r
menu.over_g=over_g
menu.over_b=over_b
menu.fade=fade
If backdrop
For Local f:Int=0 Until num
menu.bdrop.AddLast(backdrop.Create())
Next
EndIf
Return menu
End Function
Rem
bbdoc: Adds a menu item.
returns: The created menu.
about: @x and @y are the position to draw the image at. If @x is -1 then the image is centred. @i is the image.
about: @id is the value returned from @Render() for this menu item. Don't use -1 for this!
EndRem
Method Add(x:Int, y:Int, i:TImage, id:Int)
list.AddLast(TGfxMenuOpt.Create(x,y,i,id,r,g,b))
End Method
Rem
bbdoc: Renders and updates the menu.
returns: The selected item, or -1 if nothing clicked.
about: Set @hide to True to hide the menu (the backdrop is still updated). SetColor() may have changed when this routine exits.
EndRem
Method Render:Int(hide:Int)
For Local p:TGfxMenuBackdrop=EachIn bdrop
p.Update()
Next
If hide
Return -1
EndIf
Local in:Int=-1
Local mx:Int=MouseX()
Local my:Int=MouseY()
Local any:Int=False
For Local opt:TGfxMenuOpt=EachIn list
If opt.InBox(mx,my)
opt.r=Towards(over_r,opt.r)
opt.g=Towards(over_g,opt.g)
opt.b=Towards(over_b,opt.b)
SetColor(opt.r,opt.g,opt.b)
If KeyDown(MOUSE_LEFT)
mbdown=True
DrawImage(opt.i,opt.x,opt.y+2)
any=True
Else
DrawImage(opt.i,opt.x,opt.y)
If mbdown
in=opt.id
EndIf
mbdown=False
EndIf
Else
opt.r=Towards(r,opt.r)
opt.g=Towards(g,opt.g)
opt.b=Towards(b,opt.b)
SetColor(opt.r,opt.g,opt.b)
DrawImage(opt.i,opt.x,opt.y)
EndIf
Next
If Not any
mbdown=False
EndIf
Return in
End Method
Method Towards:Int(dest:Int, val:Int)
If val<dest
Return Min(dest,val+fade)
ElseIf val>dest
Return Max(dest,val-fade)
EndIf
Return val
End Method
End Type
Private
Type TGfxMenuOpt
Field x:Int
Field y:Int
Field i:TImage
Field id:Int
Field r:Int
Field g:Int
Field b:Int
Function Create:TGfxMenuOpt(x:Int, y:Int, i:TImage, id:Int, r:Int, g:Int, b:Int)
Local o:TGfxMenuOpt=New TGfxMenuOpt
If x=-1
x=(GraphicsWidth()-ImageWidth(i))/2
EndIf
o.x=x
o.y=y
o.i=i
o.id=id
o.r=r
o.g=g
o.b=b
Return o
End Function
Method InBox:Int(mx:Int, my:Int)
Return mx>=x And my>=y And mx<=x+ImageWidth(i) And my<=y+ImageHeight(i)
End Method
End Type
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