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Simple Text Menu
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By: Kevin Picone Added: June 21st, 2022
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Category: All,GUI,Menu
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Simple Text Menu
While tinkering last night, I wrote a simple menu library that lets the programmer define a list of text options that can have a key and mousing bindings as well. The library is more a starting point than a end product, but it shows a way how we can wrap a system into library that help us separate that functionality from the main program. The user can tag a function (by name) that is called when any option is clicked or the key binding is pressed.
Example:
So our processing loop looks like this..
loadfont "verdana",1 , 48
cr$=chr$(10)+chr$(13)
Options$ =" L) Load File [BindKey=38][OnClick=LOAD_FUNCTION]"+cr$
Options$+=" S) Save File [BindKey=31][OnClick=SAVE_FUNCTION]"+cr$
Options$+=" D) Delete File [BindKey=32][OnClick=DELETE_FUNCTION]"+cr$
//
GUI_CREATE_SIMPLE_MENU(Options$)
Do
cls $304050
GUI_UPDATE_SIMPLE_MENU_INPUTSTATE()
GUI_DRAW_SIMPLE_MENU()
action$=GUI_Get_SIMPLE_MENU_CLICKS()
if Len(Action$)
Index=FunctionIndex(Action$)
if Index
CallFunction Action$
endif
endif
sync
loop
Function LOad_Function()
cls 255
print "LOAD FUNCTION"
EndFunction
Function SAVE_Function()
cls $00ff00
Print "SAVE FUNCTION"
EndFunction
Function DELETE_Function()
cls $ff0000
Print "DELETE FUNCTION"
EndFunction
COMPLETE EXAMPLE:
loadfont "verdana",1 , 48
cr$=chr$(10)+chr$(13)
Options$ =" L) Load File [BindKey=38][OnClick=LOAD_FUNCTION]"+cr$
Options$+=" S) Save File [BindKey=31][OnClick=SAVE_FUNCTION]"+cr$
Options$+=" D) Delete File [BindKey=32][OnClick=DELETE_FUNCTION]"+cr$
//
GUI_CREATE_SIMPLE_MENU(Options$)
Do
cls $304050
GUI_UPDATE_SIMPLE_MENU_INPUTSTATE()
GUI_DRAW_SIMPLE_MENU()
action$=GUI_Get_SIMPLE_MENU_CLICKS()
if Len(Action$)
Index=FunctionIndex(Action$)
if Index
CallFunction Action$
endif
endif
sync
loop
Function LOad_Function()
cls 255
print "LOAD FUNCTION"
EndFunction
Function SAVE_Function()
cls $00ff00
Print "SAVE FUNCTION"
EndFunction
Function DELETE_Function()
cls $ff0000
Print "DELETE FUNCTION"
EndFunction
//------------------------------------------------------------------
//------------------------------------------------------------------
//------------------------------------------------------------------
//------------------------------------------------------------------
//------------------------------------------------------------------
Type tSimpleTextMenuInputState
Status
MX
MY
MB
ScanCode
EndType
Type tSimpleTextMenu
Caption$
KeyBindingScanCode
FunctionToCall$
x1,y1,x2,y2 ; render position of this on screen
MouseOver
EndType
Dim SimpleTextMenu(256) as tSimpleTextmenu
Dim SimpleTextmenuInputState as tSimpleTextMenuInputState
function GUI_CREATE_SIMPLE_MENU(MenuOptions$)
// Redim the Global Memu
Dim SimpleTextMenu(256) as tSimpleTextmenu
//
GUI_INIT_SIMPLE_MENU_INPUTSTATE()
dim Rows$(1024)
Options$=Replace$(MenuOptions$,chr$(10),"")
LinesOfText = SplitToArray(options$,chr$(13),rows$(),0,0)
MenuIndex =1
for lp=0 to LinesOftext-1
s$=Rows$(lp)
// Check for empty line
if len(trim$(S$))>0
Param_KeyBind$ =""
Param_Onclick$ =""
Current_Pos =1
do
// Look for square brackets
Left_pos=instring(s$,"[",Current_pos)
if Left_Pos
Right_pos=instring(s$,"]",Current_pos)
If Right_Pos>Left_Pos
Opcode$=Mid$(s$,Left_pos+1,(Right_Pos-Left_Pos)-1)
Current_Pos=Left_pos
S1$= Left$(s$,Left_pos-1)
S2$= CutLeft$(s$,Right_pos)
s$=s1$+s2$
// get Opcode and Value
Value$ =""
Equals_pos = instring(opcode$,"=")
if Equals_pos
Value$ = CutLeft$(Opcode$,Equals_pos)
Opcode$ = Left$(Opcode$,Equals_pos-1)
endif
Select upper$(trim$(opcode$))
// process embedded opcodes for this menu option
case "ONCLICK"
Param_Onclick$ = value$
case "KEYBIND", "BINDKEY", "KEY"
Param_KEYBIND$ = value$
EndSelect
// reset the next search
Current_pos=Left_pos
else
Current_Pos=Left_pos+1
endif
else
exitdo
endif
loop
// -----------------------------------------------
if Len(s$)
// -----------------------------------------------
SimpleTextMenu(MenuIndex)=New tSimpleTextMenu
SimpleTextMenu(MenuIndex).Caption =s$
SimpleTextMenu(MenuIndex).KeyBindingScanCode =val(Param_KeyBind$)
SimpleTextMenu(MenuIndex).FunctionToCall =Param_OnClick$
MenuIndex ++
endif
endif
next
EndFunction
function GUI_DRAW_SIMPLE_MENU()
GUI_INIT_SIMPLE_MENU_INPUTSTATE()
// Message includes the ONCLICK=
MouseStatus = SimpleTextmenuInputState.Status
Mx = SimpleTextmenuInputState.MX
My = SimpleTextmenuInputState.MY
Mb = SimpleTextmenuInputState.MB
CursorX =GetCursorX()
CursorY =GetCursorY()
TH =GettextHeight("|")
for lp=0 to getArrayElements(SimpleTextMenu())
if SimpleTextMenu(lp)
T$=SimpleTextMenu(lp).Caption$
CursorX2 = CursorX1+GettextWidth(t$)
CursorY2 = CursorY1+TH
SimpleTextMenu(lp).x1=CursorX1
SimpleTextMenu(lp).X2=CursorX2
SimpleTextMenu(lp).Y1=CursorY1
SimpleTextMenu(lp).Y2=CursorY2
MouseOverState = 0
if MouseStatus
if range(My,CursorY1,CursorY2-1)
inkmode 1+32
c=GetInk()
BoxC 0,CursorY1,getSurfaceWidth(),CursorY2,true,RgbFade(c,50)
inkmode 1
MouseOverState = 1
endif
endif
SimpleTextMenu(lp).MouseOver =MouseOverState
// Check if mouse over
text CursorX1,CursorY1, t$
CursorY1=CursorY2
endif
next
EndFunction
Function GUI_Get_SIMPLE_MENU_CLICKS()
GUI_INIT_SIMPLE_MENU_INPUTSTATE()
MouseStatus = SimpleTextmenuInputState.Status
Mx = SimpleTextmenuInputState.MX
My = SimpleTextmenuInputState.MY
Mb = SimpleTextmenuInputState.MB
if MouseStatus
if MB
for lp=0 to getArrayElements(SimpleTextMenu())
if SimpleTextMenu(lp)
if SimpleTextMenu(lp).MouseOver
if Mb & 1
Action$ = SimpleTextMenu(lp).FunctionToCall
endif
endif
endif
next
endif
endif
SC = SimpleTextmenuInputState.ScanCode
if SC
for lp=0 to getArrayElements(SimpleTextMenu())
if SimpleTextMenu(lp)
if SimpleTextMenu(lp).KeyBindingScanCode=SC
Action$ = SimpleTextMenu(lp).FunctionToCall
endif
endif
next
endif
EndFunction Action$
Function GUI_UPDATE_SIMPLE_MENU_INPUTSTATE()
GUI_INIT_SIMPLE_MENU_INPUTSTATE()
SimpleTextmenuInputState.Status = true
SimpleTextmenuInputState.Mx =MouseX()
SimpleTextmenuInputState.MY =MouseY()
SimpleTextmenuInputState.MB =MouseButton()
SimpleTextmenuInputState.ScanCode =ScanCode()
EndFunction
Function GUI_INIT_SIMPLE_MENU_INPUTSTATE()
if GetArrayStatus(SimpleTextmenuInputState())=false
Dim SimpleTextmenuInputState as tSimpleTextMenuInputState
endif
EndFunction
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Release Type:
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