FLtext
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## FLtext

FLtext — A FLTK widget opcode that creates a textbox.

## Description

FLtext allows the user to modify a parameter value by directly typing it into a text field.

## Syntax

    kout, ihandle FLtext "label", imin, imax, istep, itype, iwidth, \
          iheight, ix, iy

## Initialization

ihandle -- a handle value (an integer number) that unequivocally references a corresponding widget. This is used by other opcodes that modify a widget's properties (see Modifying FLTK Widget Appearance). It is automatically output by FLtext and must not be set by the user label. (The user label is a double-quoted string containing some user-provided text placed near the widget.)

“label” -- a double-quoted string containing some user-provided text, placed near corresponding widget.

imin -- minimum value of output range.

imax -- maximum value of output range.

istep -- a floating-point number indicating the increment of valuator value corresponding to the mouse dragging. The istep argument allows the user to arbitrarily slow mouse motion, enabling arbitrary precision.

itype -- an integer number denoting the appearance of the valuator.

The itype argument can be set to the following values:

- 1 - normal behaviour

- 2 - dragging operation is suppressed, instead it will appear two arrow buttons. A mouse-click on one of these buttons can increase/decrease the output value.

- 3 - text editing is suppressed, only mouse dragging modifies the output value.

iwidth -- width of widget.

iheight -- height of widget.

ix -- horizontal position of upper left corner of the valuator, relative to the upper left corner of corresponding window (expressed in pixels).

iy -- vertical position of upper left corner of the valuator, relative to the upper left corner of corresponding window (expressed in pixels).

## Performance

kout -- output value

FLtext allows the user to modify a parameter value by directly typing it into a text field:

FLtext.

Its value can also be modified by clicking on it and dragging the mouse horizontally. The istep argument allows the user to arbitrarily set the response on mouse dragging.

## Examples

Here is an example of the FLtext opcode. It uses the file FLtext.csd.

Example 335. Example of the FLtext opcode.

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.

    <CsoundSynthesizer>
    <CsOptions>
    ; Select audio/midi flags here according to platform
    ; Audio out   Audio in    No messages
    -odac           -iadc     -d     ;;;RT audio I/O
    ; For Non-realtime ouput leave only the line below:
    ; -o FLtext.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

    ; A sine with oscillator with fltext box controlled
    ; frequency either click and drag or double click and
    ; type to change frequency value
    sr = 44100
    kr = 441
    ksmps = 100
    nchnls = 1

    FLpanel "Frequency Text Box", 270, 600, 50, 50
        ; Minimum value output by the text box
        imin = 200
        ; Maximum value output by the text box
        imax = 5000
        ; Step size
        istep = 1
        ; Text box graphic type
        itype = 1
        ; Width of the text box in pixels
        iwidth = 70
        ; Height of the text box in pixels
        iheight = 30
        ; Distance of the left edge of the text box
        ; from the left edge of the panel
        ix = 100
        ; Distance of the top edge of the text box
        ; from the top edge of the panel
        iy = 300

        gkfreq,ihandle FLtext "Enter the frequency", imin, imax, istep, itype, iwidth, iheight, ix, iy
    ; End of panel contents
    FLpanelEnd
    ; Run the widget thread!
    FLrun

    instr 1
        iamp = 15000
        ifn = 1
        asig oscili iamp, gkfreq, ifn
        out asig
    endin

    </CsInstruments>
    <CsScore>

    ; Function table that defines a single cycle
    ; of a sine wave.
    f 1 0 1024 10 1

    ; Instrument 1 will play a note for 1 hour.
    i 1 0 3600
    e

    </CsScore>
    </CsoundSynthesizer>

## See Also

FLcount, FLjoy, FLknob, FLroller, FLslider

## Credits

Author: Gabriel Maldonado

New in version 4.22

Example written by Iain McCurdy, edited by Kevin Conder.

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