FLTK headers for FreeBasic OOP (no C wrapper)

Headers, Bindings, Libraries for use with FreeBASIC, Please include example of use to help ensure they are tested and usable.
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angros47
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Joined: Jun 21, 2005 19:04

Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by angros47 »

In Fl_Tree_Prefs.bi, change:

Code: Select all

private function Fl_Tree.prefs() byref as const Fl_Tree_Prefs 
	return prefs
end function
To

Code: Select all

private function Fl_Tree.prefs() byref as const Fl_Tree_Prefs 
	return _prefs
end function
demosthenesk
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Joined: Jul 15, 2021 7:23
Location: Greece
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Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by demosthenesk »

angros47 wrote: Aug 21, 2023 21:17 In Fl_Tree_Prefs.bi, change:

Code: Select all

private function Fl_Tree.prefs() byref as const Fl_Tree_Prefs 
	return prefs
end function
To

Code: Select all

private function Fl_Tree.prefs() byref as const Fl_Tree_Prefs 
	return _prefs
end function
there is no private function Fl_Tree.prefs() in Fl_Tree_Prefs.bi
angros47
Posts: 2331
Joined: Jun 21, 2005 19:04

Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by angros47 »

Sorry, I meant in Fl_Tree.bi
demosthenesk
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Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by demosthenesk »

angros47 wrote: Aug 22, 2023 5:58 Sorry, I meant in Fl_Tree.bi
ok! That has fix the problem...

angros47, did you pass these fixes to github ?
demosthenesk
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Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by demosthenesk »

Another FLTK example...
we have a window with a tree widget...

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#include once "FLTK/Fl_Double_Window.bi"
#include once "FLTK/Fl_Menu_Bar.bi"
#include once "FLTK/Fl_Tree.bi"

'Tree's callback
'Invoked whenever an item's state changes.
'This callback is invoked whenever the user clicks an item in the menu bar
Sub TreeCallback(w as Fl_Widget ptr, p as any ptr)
	var tree = cptr(Fl_Tree ptr, w)
	dim item as const Fl_Tree_Item ptr = cptr(Fl_Tree_Item ptr, tree->callback_item())
	if (item <> 1) then 
		exit sub
	end if
	
	select case (tree->callback_reason())
	case FL_TREE_REASON_SELECTED
		dim pathname as string*256
		tree->item_pathname(pathname, sizeof(pathname), item)
		print "TreeCallback: Item selected=" & item->label() & " Full pathname= " & pathname
	case FL_TREE_REASON_DESELECTED
		print "TreeCallback: Item " & item->label() & " deselected"
	case FL_TREE_REASON_OPENED
		print "TreeCallback: Item " & item->label() & " opened"
	case FL_TREE_REASON_CLOSED
		print "TreeCallback: Item " & item->label() & " closed"
	end select
end sub

'main program
Fl.scheme("gtk+")
dim win as Fl_Double_Window = Fl_Double_Window(250, 400, "Simple Tree")
win.begin()
'Create the tree
dim tree as Fl_Tree= Fl_Tree(10, 10, win.w()-20, win.h()-20)
tree.showroot(0)	'don't show root of tree
dim cb as Fl_Callback = @TreeCallback
tree.callback(cb)	'setup a callback for the tree

'Add some items
tree.add("Flintstones/Fred")
tree.add("Flintstones/Wilma")
tree.add("Flintstones/Pebbles")
tree.add("Simpsons/Homer")
tree.add("Simpsons/Marge")
tree.add("Simpsons/Bart")
tree.add("Simpsons/Lisa")
tree.add(!"Pathnames/\\/bin")	'front slashes
tree.add(!"Pathnames/\\/usr\\/sbin")
tree.add(!"Pathnames/C:\\\\Program Files")	'backslashes
tree.add(!"Pathnames/C:\\\\Documents and Settings")

tree.close_("Simpsons")
tree.close_("Pathnames")

win.end_()
win.resizable(win)
win.show()
Fl.run_()
demosthenesk
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Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by demosthenesk »

Another FLTK example....
we have a window with a menu bar...

Code: Select all

#include once "FLTK/Fl_Window.bi"
#include once "FLTK/Fl_Menu_Bar.bi"
#include once "FLTK/filename.bi"

' This callback is invoked whenever the user clicks an item in the menu bar
Sub MyMenuCallback(w as Fl_Widget ptr, p as any ptr)
	dim bar as Fl_Menu_Bar ptr = cptr(Fl_Menu_Bar ptr, w)
	dim item as const Fl_Menu_Item ptr = cptr(Fl_Menu_Item ptr, bar->mvalue())
	
	dim ipath as string*256
	bar->item_pathname(ipath, sizeof(ipath))	' Get full pathname of picked item
	
	print "callback: You picked " & *item->label()	'Print item picked
	print "item_pathname() is: " & ipath	'and full pathname

	if ( item->flags and (FL_MENU_RADIO or FL_MENU_TOGGLE) ) then 	'Toggle or radio item?
		print "value is " & iif(item->value(), "on", "off")	'Print item's value
	end if
	
	if (*item->label() = "Google" ) then
		'fl_open_uri("http://google.com/")
	end if
	
	if (*item->label()="&Quit") then
		end
	end if
end sub

'main program
Fl.scheme("gtk+")
dim win as Fl_Window = Fl_Window(400,200, "menubar-simple") ' Create window
dim menu as Fl_Menu_Bar = Fl_Menu_Bar(0,0,400,25)	' Create menubar, items..
Dim cb as Fl_Callback = @MyMenuCallback
menu.add("&File/&Open", "^o", cb)
menu.add("&File/&Save", "^s", cb, 0, FL_MENU_DIVIDER)
menu.add("&File/&Quit", "^q", cb)
menu.add("&Edit/&Copy", "^c", cb)
menu.add("&Edit/&Paste", "^v", cb, 0, FL_MENU_DIVIDER)
menu.add("&Edit/Radio 1", 0, cb, 0, FL_MENU_RADIO)
menu.add("&Edit/Radio 2", 0, cb, 0, FL_MENU_RADIO or FL_MENU_DIVIDER)
menu.add("&Edit/Toggle 1", 0, cb, 0, FL_MENU_TOGGLE)			' Default: off 
menu.add("&Edit/Toggle 2", 0, cb, 0, FL_MENU_TOGGLE)			' Default: off
menu.add("&Edit/Toggle 3", 0, cb, 0, FL_MENU_TOGGLE or FL_MENU_VALUE)	' Default: on
menu.add("&Help/Google", 0, cb)

win.end_()
win.show()
Fl.run_()
The fl_open_uri("http://google.com/") is missing from the filenames.bi ... it exists in C++ headers but not in FreeBASIC's
Is it possible to add it ? @angros47
demosthenesk
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Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by demosthenesk »

demosthenesk wrote: Aug 15, 2023 17:20 I was started to writing a book about FLTK and FreeBASIC.
It is based on fltk-1.3.5.pdf documentation and example code by Angelo Rosina (angros47) and me Demosthenes Koptsis (demosthenesk).
Soon available...

https://github.com/demosthenesk/Getting ... BASIC-Book

Image
The book has been released !
You can read it as pdf or odt from here:
https://github.com/demosthenesk/Getting ... BASIC-Book
angros47
Posts: 2331
Joined: Jun 21, 2005 19:04

Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by angros47 »

I guess it can be declared as

Code: Select all

declare function fl_open_uri(uri as const zstring ptr, msg as zstring ptr= 0, msglen as long = 0) as long
test it to see if it has to be inside an 'extern "c" ' or extern "c++" ' block

But, why do you need that command? Can't you just do something like

Code: Select all

shell "xdg-open http://google.com"
or similar?
The main reason I didn't bother to translate the headers of filenames is that FreeBasic already provided equivalent functions
demosthenesk
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Joined: Jul 15, 2021 7:23
Location: Greece
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Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by demosthenesk »

angros47 wrote: Aug 22, 2023 16:07 I guess it can be declared as

Code: Select all

declare function fl_open_uri(uri as const zstring ptr, msg as zstring ptr= 0, msglen as long = 0) as long
test it to see if it has to be inside an 'extern "c" ' or extern "c++" ' block

But, why do you need that command? Can't you just do something like

Code: Select all

shell "xdg-open http://google.com"
or similar?
The main reason I didn't bother to translate the headers of filenames is that FreeBasic already provided equivalent functions
it is in an example of FLTK and it is provided by the lib...so why not to be included ?
angros47
Posts: 2331
Joined: Jun 21, 2005 19:04

Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by angros47 »

Another example: table-simple.bas

Code: Select all

'
' "$Id$"
'
'    Simple example of using Fl_Table - Greg Ercolano 11/29/2010
'
'    Demonstrates the simplest use of Fl_Table possible.
'    Display a 10x10 array of integers with row/col headers.
'    No interaction; simple display of data only.
'    See other examples for more complex interactions with the table.
'
' Copyright 2010 Greg Ercolano.
' Copyright 1998-2010 by Bill Spitzak and others.
'
' This library is free software. Distribution and use rights are outlined in
' the file "COPYING" which should have been included with this file.  If this
' file is missing or damaged, see the license at:
'
'     http:'www.fltk.org/COPYING.php
'
' Please report all bugs and problems on the following page:
'
'     http:'www.fltk.org/str.php
' 
#include once "FLTK/Fl.bi"
#include once "FLTK/Fl_Double_Window.bi"
#include once "FLTK/Fl_Table.bi"
#include once "FLTK/fl_draw.bi"
#include once "FLTK/Fl_Menu_Bar.bi"

extern "c++"

#define MAX_ROWS 30
#define MAX_COLS 26		' A-Z

' Derive a class from Fl_Table
type MyTable extends Fl_Table
private:
	declare constructor (byref w as const MyTable)
	declare operator let (byref w as const MyTable)

	data_(MAX_ROWS,MAX_COLS) as long		' data array for cells

	' Draw the row/col headings
	'    Make this a dark thin upbox with the text inside.
	'
	declare sub DrawHeader(s as const zstring ptr, X as long, Y as long, W as long, H as long)

	' Draw the cell data
	'    Dark gray text on white background with subtle border
	'
	declare sub DrawData(s as const zstring ptr, X as long, Y as long, W as long, H as long) 

	' Handle drawing table's cells
	'     Fl_Table calls this function to draw each visible cell in the table.
	'     It's up to us to use FLTK's drawing functions to draw the cells the way we want.
	'
	declare sub draw_cell(context as TableContext, ROW as long=0, COL as long=0, X as long=0, Y as long=0, W as long=0, H as long=0) 
public:
	' Constructor
	'     Make our data array, and initialize the table options.
	'
	declare constructor(X as long, Y as long, W as long, H as long, L as const zstring ptr=0)
	declare destructor()
end type

private sub MyTable.DrawHeader(s as const zstring ptr, X as long, Y as long, W as long, H as long)
	fl_push_clip(X,Y,W,H)
	fl_draw_box(FL_THIN_UP_BOX, X,Y,W,H, row_header_color())
	fl_color(FL_BLACK)
	fl_draw(s, X,Y,W,H, FL_ALIGN_CENTER)
	fl_pop_clip()
end sub

private sub MyTable.DrawData(s as const zstring ptr, X as long, Y as long, W as long, H as long) 
	fl_push_clip(X,Y,W,H)
	' Draw cell bg
	fl_color(FL_WHITE): fl_rectf(X,Y,W,H)
	' Draw cell data
	fl_color(FL_GRAY0): fl_draw(s, X,Y,W,H, FL_ALIGN_CENTER)
	' Draw box border
	fl_color(color()): fl_rect(X,Y,W,H)
	fl_pop_clip()
end sub

private sub MyTable.draw_cell(context as TableContext, ROW as long=0, COL as long=0, X as long=0, Y as long=0, W as long=0, H as long=0) 
	static s as zstring * 40
	select case context
	case CONTEXT_STARTPAGE:                   ' before page is drawn..
		fl_font(FL_HELVETICA, 16)         ' set the font for our drawing operations
		return 
	case CONTEXT_COL_HEADER:                  ' Draw column headers
'		sprintf(s,"%c",'A'+COL)           ' "A", "B", "C", etc.
		s=chr(65+COL)
		DrawHeader(s,X,Y,W,H)
		return
	case CONTEXT_ROW_HEADER                  ' Draw row headers
'		sprintf(s,"%03d:",ROW)           ' "001:", "002:", etc
		s=str(ROW)
		DrawHeader(s,X,Y,W,H)
		return
	case CONTEXT_CELL:                        ' Draw data in cells
'		sprintf(s,"%d",data(ROW,COL))
		s=str(data_(ROW,COL))
		DrawData(s,X,Y,W,H)
		return
	case else:
		return
	end select
end sub

private constructor MyTable(X as long, Y as long, W as long, H as long, L as const zstring ptr=0)
	base(X,Y,W,H,L)
	' Fill data array
	for r as integer=0 to MAX_ROWS
		for c as integer=0 to MAX_COLS
			data_(r,c) = 1000+(r*1000)+c
		next
	next
	' Rows
	rows(MAX_ROWS)             ' how many rows
	row_header(1)              ' enable row headers (along left)
	row_height_all(20)         ' default height of rows
	row_resize(0)              ' disable row resizing
	' Cols
	cols(MAX_COLS)             ' how many columns
	col_header(1)              ' enable column headers (along top)
	col_width_all(80)          ' default width of columns
	col_resize(1)              ' enable column resizing
	end_()			   ' end the Fl_Table group
end constructor

private destructor MyTable()
end destructor
end extern

dim win as Fl_Double_Window=Fl_Double_Window (900, 400, "Simple Table")
dim table as MyTable=MyTable(10,10,880,380)
win.end_()
win.resizable(table)
win.show(__FB_ARGC__, __FB_ARGV__)
Fl.run_()

'
' End of "$Id$".
'
Porting this example exposed several mistakes in the headers. I should have fixed them, make sure to download the latest version of the headers (and to have no previous version cached by the IDE)
demosthenesk
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Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by demosthenesk »

i think that copyright is for the c++ code...
The freebasic code is the translate by the developer who wrote it and it is not copyrighted by the c++ developers of the example....
angros47
Posts: 2331
Joined: Jun 21, 2005 19:04

Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by angros47 »

Actually it's not copyright, it's copyleft ;-)

BTW, did it work for you?
demosthenesk
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Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by demosthenesk »

angros47 wrote: Aug 24, 2023 20:48 Actually it's not copyright, it's copyleft ;-)

BTW, did it work for you?
yes i have downloaded the latest headers and it works fine
angros47
Posts: 2331
Joined: Jun 21, 2005 19:04

Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by angros47 »

tree-as-container.bas

Code: Select all

'
' "$Id$"
'
'	Fl_Tree as a container of FLTK widgets. - erco 04/15/2012
'
' Copyright 2010,2012 Greg Ercolano.
' Copyright 1998-2010 by Bill Spitzak and others.
'
' This library is free software. Distribution and use rights are outlined in
' the file "COPYING" which should have been included with this file.  If this
' file is missing or damaged, see the license at:
'
'     http:'www.fltk.org/COPYING.php
'
' Please report all bugs and problems on the following page:
'
'     http:'www.fltk.org/str.php
'
#include once "FLTK/Fl.bi"
#include once "FLTK/Fl_Double_Window.bi"
#include once "FLTK/Fl_Tree.bi"
#include once "FLTK/Fl_Group.bi"
#include once "FLTK/Fl_Input.bi"
#include once "FLTK/Fl_Menu_Item.bi"

#define MAX_ROWS     20000
#define MAX_FIELDS   5
#define FIELD_WIDTH  70
#define FIELD_HEIGHT 30

type MyData extends Fl_Group 
private:
	declare constructor (byref w as const MyData)
	declare operator let (byref w as const MyData)

	fields(MAX_FIELDS-1) as Fl_Input ptr
public:
	declare constructor(X as long, Y as long, W as long, H as long)
	declare sub SetData(col as long, val_ as const zstring ptr)
end type

private constructor MyData(X as long, Y as long, W as long, H as long)
	base(X,Y,W,H)
	static colors(MAX_FIELDS-1) as unsigned long = {&Hffffdd00, &Hffdddd00, &Hddffff00, &Hddffdd00, &Hddddff00}
	for t as integer=0 to MAX_FIELDS-1
		fields(t) = new Fl_Input(X+t*FIELD_WIDTH,Y,FIELD_WIDTH,H)
		fields(t)->color(cast(Fl_Color,colors(t)))
	next
	end_()
end constructor


private sub MyData.SetData(col as long, val_ as const zstring ptr)
	if col >= 0 andalso col < MAX_FIELDS then
		fields(col)->value(val_)
	end if
end sub

dim win as Fl_Double_Window ptr = new Fl_Double_Window(450, 400, "Tree As FLTK Widget Container")
win->begin()
	' Create the tree
	dim tree as Fl_Tree ptr  = new Fl_Tree(10, 10, win->w()-20, win->h()-20)
	tree->showroot(0)				' don't show root of tree
	' Add some regular text nodes
	tree->add("Foo/Bar/001")
	tree->add("Foo/Bar/002")
	tree->add("Foo/Bla/Aaa")
	tree->add("Foo/Bla/Bbb")
	' Add items to the 'Data' node

	for t as integer=0 to MAX_ROWS
		' Add item to tree
		static s as zstring*79
		'sprintf(s, "FLTK Widgets/%d", t)
		s="FLTK Widgets/"+str(t)
		dim item as Fl_Tree_Item ptr = tree->add(s)
		' Reconfigure item to be an FLTK widget (MyData)
		tree->begin()
			dim data_ as MyData ptr = new MyData(0,0,FIELD_WIDTH*MAX_FIELDS, FIELD_HEIGHT)
			item->widget(data_)
			' Initialize widget data
			for c as integer=0 to MAX_FIELDS
				'sprintf(s, "%d-%d", t,c);
				s=str(t)+"-"+str(c)
				data_->SetData(c,s)
			next
		tree->end_()
	next
win->end_()
win->resizable(win)
win->show(__FB_ARGC__, __FB_ARGV__)
Fl.run_()



'
' End of "$Id$".
'
angros47
Posts: 2331
Joined: Jun 21, 2005 19:04

Re: FLTK headers for FreeBasic OOP (no C wrapper)

Post by angros47 »

textdisplay-with-colors.bas

Code: Select all

'
' "$Id$"
'
'	How to use Fl_Text_Display with colors. -erco 11/09/2010
'	Originally from erco's cheat sheet, permission by author.
'
'	Shows how to use the two Fl_Text_Buffer's needed to manage
'	the text and style info separately.
'
'	For an example of a color text *editor*, see the 'editor'
'	example in the test directory.
'
' Copyright 2010 Greg Ercolano.
' Copyright 1998-2010 by Bill Spitzak and others.
'
' This library is free software. Distribution and use rights are outlined in
' the file "COPYING" which should have been included with this file.  If this
' file is missing or damaged, see the license at:
'
'     http:'www.fltk.org/COPYING.php
'
' Please report all bugs and problems on the following page:
'
'     http:'www.fltk.org/str.php
'
#include once "FLTK/Fl.bi"
#include once "FLTK/Fl_Window.bi"
#include once "FLTK/Fl_Text_Display.bi"

' Style table
dim stable(...) as Fl_Text_Display.Style_Table_Entry = {_
_	' FONT COLOR      FONT FACE   FONT SIZE
_	' --------------- ----------- --------------
	(  FL_RED,         FL_COURIER, 18 ),_ ' A - Red
	(  FL_DARK_YELLOW, FL_COURIER, 18 ),_ ' B - Yellow
	(  FL_DARK_GREEN,  FL_COURIER, 18 ),_ ' C - Green
	(  FL_BLUE,        FL_COURIER, 18 )_ ' D - Blue
}

dim win as Fl_Window ptr = new Fl_Window(640, 480, "Simple Text Display With Colors")
dim disp as Fl_Text_Display ptr = new Fl_Text_Display(20, 20, 640-40, 480-40)
dim tbuff as Fl_Text_Buffer ptr = new Fl_Text_Buffer()	' text buffer
dim sbuff as Fl_Text_Buffer ptr = new Fl_Text_Buffer()	' style buffer
disp->buffer(tbuff)
dim stable_size as long= ubound(stable)+1'len(stable)/len(stable(0))	' # entries in style table (4)
disp->highlight_data(sbuff, @stable(0), stable_size, asc("A"), 0, 0)
' Text
tbuff->text(!"Red Line 1\nYel Line 2\nGrn Line 3\nBlu Line 4\nRed Line 5\nYel Line 6\nGrn Line 7\nBlu Line 8\n")
' Style for text
sbuff->text(!"AAAAAAAAAA\nBBBBBBBBBB\nCCCCCCCCCC\nDDDDDDDDDD\nAAAAAAAAAA\nBBBBBBBBBB\nCCCCCCCCCC\nDDDDDDDDDD\n")
win->resizable(*disp)
win->show()
Fl.run_()


'
' End of "$Id$".
'
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