SuperStrict
Const EVENT_IMAGEBUTTONCLICKED:Int=$13370666 ' or any other, less l33t-evil, number :P
Type TImagebutton
Rem
Imagebutton and Imagebuttongroup
by CS_TBL
usage:
Local MyButton:TImagebutton=CreateImagebutton(x,y,imagehandle,parentgadgethandle,state)
By default these are buttons that simply go on and off, if you place buttons like these into an
Imagebuttongroup, then all buttons in such a group act like radiobuttons, e.g. only one can be
switched on at one time. Typically you'd have to use a panel in B+/BmaxGUI for this with normal
buttons.
Local group:TImagebuttongroup=New TImagebuttongroup
and then:
group.Add MyButton1
group.Add MyButton2
group.Add MyButton3
etc.
It's all automated with eventhooks, <*> create it .. and use it! <*>
Buttons are the size of your image. Activated buttons are simply the source-image, de-activated
buttons are the same.. but grey. A little highlight is shown upon hovering with the mouse.
[Z] and [X] when the mousepointer is on the button, double as leftclick and rightclick. The button
can accept leftclicks and rightclicks and this can be read out from event.data or EventData().
EndRem
Field canvas:TGadget
Field parent:TGadget
Field state:Int
Field hoover:Int
Field image:TImage
Field grey:TImage
Field hooverintensity:Int=24
Field newevent:TEvent=New TEvent
Function eventhook:Object(id:Int,data:Object,context:Object)
If Timagebutton(context) Timagebutton(context).ev TEvent(data);Return data
EndFunction
Method New()
AddHook EmitEventHook,eventhook,Self
End Method
Method Free()
RemoveHook EmitEventHook,eventhook
GCCollect()
End Method
Method MakeGrey()
Local r:Int,g:Int,b:Int,c:Int
Local x:Int,y:Int
grey=CreateImage(ImageWidth(image),ImageHeight(image))
Local pm:TPixmap=LockImage(image)
Local pm2:TPixmap=LockImage(grey)
For y=0 To ImageHeight(image)-1
For x=0 To ImageWidth(image)-1
c=ReadPixel(pm,x,y)
r=c&255
g=(c/256)&255
b=(c/65536)&255
c=(r+g+b)/3
WritePixel pm2,x,y,c+256*c+65536*c|$ff000000
Next
Next
UnlockImage image
UnlockImage grey
End Method
Method ev(event:TEvent)
If event.source=canvas
If event.id=EVENT_GADGETPAINT update
If event.id=EVENT_MOUSEENTER
SetPointer POINTER_HAND ' <- comment out all SetPointer lines if you don't want changing cursors
ActivateGadget canvas
hoover=1
update
EndIf
If event.id=EVENT_MOUSELEAVE
SetPointer POINTER_DEFAULT
ActivateGadget parent
hoover=0
update
EndIf
If event.id=EVENT_MOUSEDOWN
Clickbutton event.data
EndIf
If event.id=EVENT_KEYDOWN
If event.data=90 ' Z
Clickbutton 1
EndIf
If event.data=88 ' X
Clickbutton 2
EndIf
EndIf
EndIf
End Method
Method Clickbutton(data:Int=1)
If data=1
newevent.data=1
EndIf
If data=2
newevent.data=2
EndIf
state:+1
state:Mod 2
update
newevent.source=Self
newevent.id=EVENT_IMAGEBUTTONCLICKED
EmitEvent newevent
End Method
Method update()
SetGraphics CanvasGraphics(canvas)
SetClsColor 0,0,0;Cls
If image
SetBlend MASKBLEND
SetColor 255,255,255
If state
DrawImage image,0,0
Else
DrawImage grey,0,0
EndIf
If hoover
SetColor hooverintensity,hooverintensity,hooverintensity
SetBlend LIGHTBLEND
DrawRect 0,0,GadgetWidth(canvas),GadgetHeight(canvas)
EndIf
SetBlend MASKBLEND
EndIf
Flip
End Method
Method SetState(st:Int)
state=st
update
End Method
Method GetState:Int()
Return state
End Method
Method SetIntensity(i:Int)
hooverintensity=i
End Method
End Type
Function CreateImagebutton:TImagebutton(x:Int,y:Int,image:TImage,parent:TGadget,state:Int=0)
If image=Null RuntimeError "no image given"
If parent=Null RuntimeError "no parent given"
Local a:TImagebutton=New TImagebutton
a.image=image
a.MakeGrey
a.canvas=CreateCanvas(x,y,ImageWidth(image),ImageHeight(image),parent)
a.parent=parent
a.state=state
Return a
End Function
Type TImagebuttongroup
Field list:TImagebutton[]
Field amount:Int=0
Field newevent:TEvent=New TEvent
Function eventhook:Object(id:Int,data:Object,context:Object)
If TImagebuttongroup(context) TImagebuttongroup(context).ev TEvent(data);Return data
EndFunction
Method New()
AddHook EmitEventHook,eventhook,Self
End Method
Method Free()
RemoveHook EmitEventHook,eventhook
GCCollect()
End Method
Method ev(event:TEvent)
If event.id=EVENT_IMAGEBUTTONCLICKED
Local t:Int
Local tt:Int
For t=0 To amount-1
If event.source=list[t]
For tt=0 To amount-1
list[tt].SetState 0
Next
list[t].SetState 1
EndIf
Next
EndIf
End Method
Method Add(t:TImagebutton)
amount:+1
list=list[..amount]
list[amount-1]=New TImagebutton
list[amount-1]=t
End Method
End Type
Rem
EXAMPLE!
EndRem
Local window:TGadget=CreateWindow(".",0,0,640,480)
' 4 images
Local im1:TImage=LoadImage("brush.png")
Local im2:TImage=LoadImage("cut.png")
Local im3:TImage=LoadImage("paint.png")
Local im4:TImage=LoadImage("pencil.png")
' 4 buttons that can all be switched on and off
Local MyButton1:TImagebutton=CreateImagebutton(32,32,im1,window,0)
Local MyButton2:TImagebutton=CreateImagebutton(32,80,im2,window,0)
Local MyButton3:TImagebutton=CreateImagebutton(96,32,im3,window,0)
Local MyButton4:TImagebutton=CreateImagebutton(96,80,im4,window,0)
' same stuff again..
Local MyButton5:TImagebutton=CreateImagebutton(232,32,im1,window,1)
Local MyButton6:TImagebutton=CreateImagebutton(232,80,im2,window,0)
Local MyButton7:TImagebutton=CreateImagebutton(232,128,im3,window,0)
Local MyButton8:TImagebutton=CreateImagebutton(232,176,im4,window,0)
' ..but now tucked away into a group so they act as radiobuttons (only one is active)
Local group:TImagebuttongroup=New TImagebuttongroup
group.Add MyButton5
group.Add MyButton6
group.Add MyButton7
group.Add MyButton8
Repeat
WaitEvent()
If EventID()=EVENT_WINDOWCLOSE End
If EventID()=EVENT_IMAGEBUTTONCLICKED
DebugLog Mid("leftclicked rightclicked",1+(EventData()-1)*12,12)
Select EventSource()
Case MyButton1,MyButton5
DebugLog "brush!"
Case MyButton2,MyButton6
DebugLog "cut!"
Case MyButton3,MyButton7
DebugLog "paint!"
Case MyButton4,MyButton8
DebugLog "pencil!"
End Select
EndIf
Forever
