FLTK 1.3.8: Fl_Input_Choice Class Reference

FLTK 1.3.8

Classes | Public Member Functions | List of all members
Fl_Input_Choice Class Reference

A combination of the input widget and a menu button. More...

`#include <Fl_Input_Choice.H>`

Inheritance diagram for Fl_Input_Choice:

## Public Member Functions
void | add (const char *s)
| Adds an item to the menu. More...
int | changed () const
| Returns the combined changed() state of the input and menu button widget.
void | clear ()
| Removes all items from the menu.
void | clear_changed ()
| Clears the changed() state of both input and menu button widgets.
Fl_Boxtype | down_box () const
| Gets the box type of the menu button.
void | down_box (Fl_Boxtype b)
| Sets the box type of the menu button.
| Fl_Input_Choice (int X, int Y, int W, int H, const char *L=0)
| Creates a new Fl_Input_Choice widget using the given position, size, and label string. More...
Fl_Input * | input ()
| Returns a pointer to the internal Fl_Input widget. More...
const Fl_Menu_Item * | menu ()
| Gets the Fl_Menu_Item array used for the menu.
void | menu (const Fl_Menu_Item *m)
| Sets the Fl_Menu_Item array used for the menu.
Fl_Menu_Button * | menubutton ()
| Returns a pointer to the internal Fl_Menu_Button widget. More...
void | resize (int X, int Y, int W, int H)
| Resizes the Fl_Group widget and all of its children. More...
void | set_changed ()
| Sets the changed() state of both input and menu button widgets to the specfied value.
Fl_Color | textcolor () const
| Gets the Fl_Input text field's text color.
void | textcolor (Fl_Color c)
| Sets the Fl_Input text field's text color to `c`.
Fl_Font | textfont () const
| Gets the Fl_Input text field's font style.
void | textfont (Fl_Font f)
| Sets the Fl_Input text field's font style to `f`.
Fl_Fontsize | textsize () const
| Gets the Fl_Input text field's font size.
void | textsize (Fl_Fontsize s)
| Sets the Fl_Input text field's font size to `s`.
const char * | value () const
| Returns the Fl_Input text field's current contents.
void | value (const char *val)
| Sets the Fl_Input text field's contents to `val`. More...
void | value (int val)
| Chooses item# `val` in the menu, and sets the Fl_Input text field to that value. More...
Public Member Functions inherited from Fl_Group
Fl_Widget *& | _ddfdesign_kludge ()
| This is for forms compatibility only.
void | add (Fl_Widget &)
| The widget is removed from its current group (if any) and then added to the end of this group.
void | add (Fl_Widget *o)
| See void Fl_Group::add(Fl_Widget &w)
void | add_resizable (Fl_Widget &o)
| Adds a widget to the group and makes it the resizable widget.
Fl_Widget *const * | array () const
| Returns a pointer to the array of children. More...
virtual Fl_Group * | as_group ()
| Returns an Fl_Group pointer if this widget is an Fl_Group. More...
void | begin ()
| Sets the current group so you can build the widget tree by just constructing the widgets. More...
Fl_Widget * | child (int n) const
| Returns array()[n]. More...
int | children () const
| Returns how many child widgets the group has.
void | clear ()
| Deletes all child widgets from memory recursively. More...
unsigned int | clip_children ()
| Returns the current clipping mode. More...
void | clip_children (int c)
| Controls whether the group widget clips the drawing of child widgets to its bounding box. More...
void | end ()
| Exactly the same as current(this->parent()). More...
int | find (const Fl_Widget &o) const
| See int Fl_Group::find(const Fl_Widget *w) const.
int | find (const Fl_Widget *) const
| Searches the child array for the widget and returns the index. More...
| Fl_Group (int, int, int, int, const char *=0)
| Creates a new Fl_Group widget using the given position, size, and label string. More...
void | focus (Fl_Widget *W)
void | forms_end ()
| This is for forms compatibility only.
int | handle (int)
| Handles the specified event. More...
void | init_sizes ()
| Resets the internal array of widget sizes and positions. More...
void | insert (Fl_Widget &, int i)
| The widget is removed from its current group (if any) and then inserted into this group. More...
void | insert (Fl_Widget &o, Fl_Widget *before)
| This does insert(w, find(before)). More...
void | remove (Fl_Widget &)
| Removes a widget from the group but does not delete it. More...
void | remove (Fl_Widget *o)
| Removes the widget `o` from the group. More...
void | remove (int index)
| Removes the widget at `index` from the group but does not delete it. More...
Fl_Widget * | resizable () const
| See void Fl_Group::resizable(Fl_Widget *box)
void | resizable (Fl_Widget &o)
| See void Fl_Group::resizable(Fl_Widget *box)
void | resizable (Fl_Widget *o)
| The resizable widget defines the resizing box for the group. More...
virtual | ~Fl_Group ()
| The destructor also deletes all the children. More...
Public Member Functions inherited from Fl_Widget
void | _clear_fullscreen ()
void | _set_fullscreen ()
void | activate ()
| Activates the widget. More...
unsigned int | active () const
| Returns whether the widget is active. More...
int | active_r () const
| Returns whether the widget and all of its parents are active. More...
Fl_Align | align () const
| Gets the label alignment. More...
void | align (Fl_Align alignment)
| Sets the label alignment. More...
long | argument () const
| Gets the current user data (long) argument that is passed to the callback function. More...
void | argument (long v)
| Sets the current user data (long) argument that is passed to the callback function. More...
virtual class Fl_Gl_Window * | as_gl_window ()
| Returns an Fl_Gl_Window pointer if this widget is an Fl_Gl_Window. More...
virtual Fl_Window * | as_window ()
| Returns an Fl_Window pointer if this widget is an Fl_Window. More...
Fl_Boxtype | box () const
| Gets the box type of the widget. More...
void | box (Fl_Boxtype new_box)
| Sets the box type for the widget. More...
Fl_Callback_p | callback () const
| Gets the current callback function for the widget. More...
void | callback (Fl_Callback *cb)
| Sets the current callback function for the widget. More...
void | callback (Fl_Callback *cb, void *p)
| Sets the current callback function for the widget. More...
void | callback (Fl_Callback0 *cb)
| Sets the current callback function for the widget. More...
void | callback (Fl_Callback1 *cb, long p=0)
| Sets the current callback function for the widget. More...
unsigned int | changed () const
| Checks if the widget value changed since the last callback. More...
void | clear_active ()
| Marks the widget as inactive without sending events or changing focus. More...
void | clear_changed ()
| Marks the value of the widget as unchanged. More...
void | clear_damage (uchar c=0)
| Clears or sets the damage flags. More...
void | clear_output ()
| Sets a widget to accept input. More...
void | clear_visible ()
| Hides the widget. More...
void | clear_visible_focus ()
| Disables keyboard focus navigation with this widget. More...
Fl_Color | color () const
| Gets the background color of the widget. More...
void | color (Fl_Color bg)
| Sets the background color of the widget. More...
void | color (Fl_Color bg, Fl_Color sel)
| Sets the background and selection color of the widget. More...
Fl_Color | color2 () const
| For back compatibility only. More...
void | color2 (unsigned a)
| For back compatibility only. More...
int | contains (const Fl_Widget *w) const
| Checks if w is a child of this widget. More...
void | copy_label (const char *new_label)
| Sets the current label. More...
void | copy_tooltip (const char *text)
| Sets the current tooltip text. More...
uchar | damage () const
| Returns non-zero if draw() needs to be called. More...
void | damage (uchar c)
| Sets the damage bits for the widget. More...
void | damage (uchar c, int x, int y, int w, int h)
| Sets the damage bits for an area inside the widget. More...
int | damage_resize (int, int, int, int)
| Internal use only.
void | deactivate ()
| Deactivates the widget. More...
Fl_Image * | deimage ()
| Gets the image that is used as part of the widget label. More...
const Fl_Image * | deimage () const
void | deimage (Fl_Image &img)
| Sets the image to use as part of the widget label. More...
void | deimage (Fl_Image *img)
| Sets the image to use as part of the widget label. More...
void | do_callback ()
| Calls the widget callback. More...
void | do_callback (Fl_Widget *o, long arg)
| Calls the widget callback. More...
void | do_callback (Fl_Widget *o, void *arg=0)
| Calls the widget callback. More...
void | draw_label (int, int, int, int, Fl_Align) const
| Draws the label in an arbitrary bounding box with an arbitrary alignment. More...
int | h () const
| Gets the widget height. More...
virtual void | hide ()
| Makes a widget invisible. More...
Fl_Image * | image ()
| Gets the image that is used as part of the widget label. More...
const Fl_Image * | image () const
void | image (Fl_Image &img)
| Sets the image to use as part of the widget label. More...
void | image (Fl_Image *img)
| Sets the image to use as part of the widget label. More...
int | inside (const Fl_Widget *wgt) const
| Checks if this widget is a child of `wgt`. More...
int | is_label_copied () const
| Returns whether the current label was assigned with copy_label(). More...
const char * | label () const
| Gets the current label text. More...
void | label (const char *text)
| Sets the current label pointer. More...
void | label (Fl_Labeltype a, const char *b)
| Shortcut to set the label text and type in one call. More...
Fl_Color | labelcolor () const
| Gets the label color. More...
void | labelcolor (Fl_Color c)
| Sets the label color. More...
Fl_Font | labelfont () const
| Gets the font to use. More...
void | labelfont (Fl_Font f)
| Sets the font to use. More...
Fl_Fontsize | labelsize () const
| Gets the font size in pixels. More...
void | labelsize (Fl_Fontsize pix)
| Sets the font size in pixels. More...
Fl_Labeltype | labeltype () const
| Gets the label type. More...
void | labeltype (Fl_Labeltype a)
| Sets the label type. More...
void | measure_label (int &ww, int &hh) const
| Sets width ww and height hh accordingly with the label size. More...
unsigned int | output () const
| Returns if a widget is used for output only. More...
Fl_Group * | parent () const
| Returns a pointer to the parent widget. More...
void | parent (Fl_Group *p)
| Internal use only - "for hacks only". More...
void | position (int X, int Y)
| Repositions the window or widget. More...
void | redraw ()
| Schedules the drawing of the widget. More...
void | redraw_label ()
| Schedules the drawing of the label. More...
Fl_Color | selection_color () const
| Gets the selection color. More...
void | selection_color (Fl_Color a)
| Sets the selection color. More...
void | set_active ()
| Marks the widget as active without sending events or changing focus. More...
void | set_changed ()
| Marks the value of the widget as changed. More...
void | set_output ()
| Sets a widget to output only. More...
void | set_visible ()
| Makes the widget visible. More...
void | set_visible_focus ()
| Enables keyboard focus navigation with this widget. More...
virtual void | show ()
| Makes a widget visible. More...
void | size (int W, int H)
| Changes the size of the widget. More...
int | take_focus ()
| Gives the widget the keyboard focus. More...
unsigned int | takesevents () const
| Returns if the widget is able to take events. More...
int | test_shortcut ()
| Returns true if the widget's label contains the entered '&x' shortcut. More...
const char * | tooltip () const
| Gets the current tooltip text. More...
void | tooltip (const char *text)
| Sets the current tooltip text. More...
Fl_Window * | top_window () const
| Returns a pointer to the top-level window for the widget. More...
Fl_Window * | top_window_offset (int &xoff, int &yoff) const
| Finds the x/y offset of the current widget relative to the top-level window. More...
uchar | type () const
| Gets the widget type. More...
void | type (uchar t)
| Sets the widget type. More...
int | use_accents_menu ()
| Returns non zero if MAC_USE_ACCENTS_MENU flag is set, 0 otherwise.
void * | user_data () const
| Gets the user data for this widget. More...
void | user_data (void *v)
| Sets the user data for this widget. More...
unsigned int | visible () const
| Returns whether a widget is visible. More...
unsigned int | visible_focus ()
| Checks whether this widget has a visible focus. More...
void | visible_focus (int v)
| Modifies keyboard focus navigation. More...
int | visible_r () const
| Returns whether a widget and all its parents are visible. More...
int | w () const
| Gets the widget width. More...
Fl_When | when () const
| Returns the conditions under which the callback is called. More...
void | when (uchar i)
| Sets the flags used to decide when a callback is called. More...
Fl_Window * | window () const
| Returns a pointer to the nearest parent window up the widget hierarchy. More...
int | x () const
| Gets the widget position in its window. More...
int | y () const
| Gets the widget position in its window. More...
virtual | ~Fl_Widget ()
| Destroys the widget. More...

## Additional Inherited Members
Static Public Member Functions inherited from Fl_Group
static Fl_Group * | current ()
| Returns the currently active group. More...
static void | current (Fl_Group *g)
| Sets the current group. More...
Static Public Member Functions inherited from Fl_Widget
static void | default_callback (Fl_Widget *cb, void *d)
| The default callback for all widgets that don't set a callback. More...
static unsigned int | label_shortcut (const char *t)
| Returns the Unicode value of the '&x' shortcut in a given text. More...
static int | test_shortcut (const char *, const bool require_alt=false)
| Returns true if the given text `t` contains the entered '&x' shortcut. More...
Protected Types inherited from Fl_Widget
enum | { INACTIVE = 1<<0 , INVISIBLE = 1<<1 , OUTPUT = 1<<2 , NOBORDER = 1<<3 , FORCE_POSITION = 1<<4 , NON_MODAL = 1<<5 , SHORTCUT_LABEL = 1<<6 , CHANGED = 1<<7 , OVERRIDE = 1<<8 , VISIBLE_FOCUS = 1<<9 , COPIED_LABEL = 1<<10 , CLIP_CHILDREN = 1<<11 , MENU_WINDOW = 1<<12 , TOOLTIP_WINDOW = 1<<13 , MODAL = 1<<14 , NO_OVERLAY = 1<<15 , GROUP_RELATIVE = 1<<16 , COPIED_TOOLTIP = 1<<17 , FULLSCREEN = 1<<18 , MAC_USE_ACCENTS_MENU = 1<<19 , USERFLAG3 = 1<<29 , USERFLAG2 = 1<<30 , USERFLAG1 = 1<<31 }
| flags possible values enumeration. More...
Protected Member Functions inherited from Fl_Group
void | draw ()
| Draws the widget. More...
void | draw_child (Fl_Widget &widget) const
| Forces a child to redraw. More...
void | draw_children ()
| Draws all children of the group. More...
void | draw_outside_label (const Fl_Widget &widget) const
| Parents normally call this to draw outside labels of child widgets.
int * | sizes ()
| Returns the internal array of widget sizes and positions. More...
void | update_child (Fl_Widget &widget) const
| Draws a child only if it needs it. More...
Protected Member Functions inherited from Fl_Widget
void | clear_flag (unsigned int c)
| Clears a flag in the flags mask.
void | draw_backdrop () const
| If FL_ALIGN_IMAGE_BACKDROP is set, the image or deimage will be drawn.
void | draw_box () const
| Draws the widget box according its box style.
void | draw_box (Fl_Boxtype t, Fl_Color c) const
| Draws a box of type t, of color c at the widget's position and size.
void | draw_box (Fl_Boxtype t, int x, int y, int w, int h, Fl_Color c) const
| Draws a box of type t, of color c at the position X,Y and size W,H.
void | draw_focus ()
| draws a focus rectangle around the widget
void | draw_focus (Fl_Boxtype t, int x, int y, int w, int h) const
| Draws a focus box for the widget at the given position and size.
void | draw_label () const
| Draws the widget's label at the defined label position. More...
void | draw_label (int, int, int, int) const
| Draws the label in an arbitrary bounding box. More...
| Fl_Widget (int x, int y, int w, int h, const char *label=0L)
| Creates a widget at the given position and size. More...
unsigned int | flags () const
| Gets the widget flags mask.
void | h (int v)
| Internal use only. More...
void | set_flag (unsigned int c)
| Sets a flag in the flags mask.
void | w (int v)
| Internal use only. More...
void | x (int v)
| Internal use only. More...
void | y (int v)
| Internal use only. More...

## Detailed Description

A combination of the input widget and a menu button.

The user can either type into the input area, or use the menu button chooser on the right to choose an item which loads the input area with the selected text.

The application can directly access both the internal Fl_Input and Fl_Menu_Button widgets respectively using the input() and menubutton() accessor methods.

The default behavior is to invoke the Fl_Input_Choice::callback() if the user changes the input field's contents, either by typing, pasting, or clicking a different item in the choice menu.

The callback can determine if an item was picked vs. typing into the input field by checking the value of menubutton()->changed(), which will be:

    - 1: the user picked a different item in the choice menu
    - 0: the user typed or pasted directly into the input field

Example use:

#include <stdio.h>
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Input_Choice.H>
void choice_cb(Fl_Widget *w, void *userdata) {
// Show info about the picked item
Fl_Input_Choice *choice = (Fl_Input_Choice*)w;
const Fl_Menu_Item *item = choice->menubutton()->mvalue();
printf("*** Choice Callback:\n");
printf(" item label()='%s'\n", item ? item->label() : "(No item)");
printf(" item value()=%d\n", choice->menubutton()->value());
printf(" input value()='%s'\n", choice->input()->value());
printf(" The user %s\n", choice->menubutton()->changed()
? "picked a menu item"
: "typed text");
}
int main() {
Fl_Double_Window win(200,100,"Input Choice");
win.begin();
Fl_Input_Choice choice(10,10,100,30);
choice.callback(choice_cb, 0);
choice.add("Red");
choice.add("Orange");
choice.add("Yellow");
//choice.value("Red"); // uncomment to make "Red" default
win.end();
win.show();
return Fl::run();
}
Fl.H
Fl static class.
Fl_Double_Window
The Fl_Double_Window provides a double-buffered window.
Definition: Fl_Double_Window.H:40
Fl_Input_Choice
A combination of the input widget and a menu button.
Definition: Fl_Input_Choice.H:95
Fl_Input_Choice::menubutton
Fl_Menu_Button * menubutton()
Returns a pointer to the internal Fl_Menu_Button widget.
Definition: Fl_Input_Choice.H:257
Fl_Input_Choice::add
void add(const char *s)
Adds an item to the menu.
Definition: Fl_Input_Choice.H:193
Fl_Input_Choice::input
Fl_Input * input()
Returns a pointer to the internal Fl_Input widget.
Definition: Fl_Input_Choice.H:261
Fl_Input_::value
int value(const char *)
Changes the widget text.
Definition: Fl_Input_.cxx:1284
Fl_Widget
Fl_Widget is the base class for all widgets in FLTK.
Definition: Fl_Widget.H:101
Fl_Widget::w
int w() const
Gets the widget width.
Definition: Fl_Widget.H:294
Fl_Widget::callback
Fl_Callback_p callback() const
Gets the current callback function for the widget.
Definition: Fl_Widget.H:561
Fl_Widget::changed
unsigned int changed() const
Checks if the widget value changed since the last callback.
Definition: Fl_Widget.H:781
Fl::run
static int run()
As long as any windows are displayed this calls Fl::wait() repeatedly.
Definition: Fl.cxx:641

## Constructor & Destructor Documentation

## ◆ Fl_Input_Choice()

Fl_Input_Choice::Fl_Input_Choice | ( | int | X,
|  | int | Y,
|  | int | W,
|  | int | H,
|  | const char * | L = `0`
| ) |  |

Creates a new Fl_Input_Choice widget using the given position, size, and label string.

Inherited destructor destroys the widget and any values associated with it.

## Member Function Documentation

## ◆ add()

void Fl_Input_Choice::add | ( | const char * | s | ) |
| inline

Adds an item to the menu.

You can access the more complex Fl_Menu_Button::add() methods (setting callbacks, userdata, etc), via menubutton(). Example:

Fl_Input_Choice *choice = new Fl_Input_Choice(100,10,120,25,"Fonts");
Fl_Menu_Button *mb = choice->menubutton(); // use Fl_Input_Choice's Fl_Menu_Button
mb->add("Helvetica", 0, MyFont_CB, (void*)mydata); // use Fl_Menu_Button's add() methods
mb->add("Courier", 0, MyFont_CB, (void*)mydata);
mb->add("More..", 0, FontDialog_CB, (void*)mydata);
Fl_Input_Choice::Fl_Input_Choice
Fl_Input_Choice(int X, int Y, int W, int H, const char *L=0)
Creates a new Fl_Input_Choice widget using the given position, size, and label string.
Definition: Fl_Group.cxx:833

## ◆ input()

Fl_Input * Fl_Input_Choice::input | ( |  | ) |
| inline

Returns a pointer to the internal Fl_Input widget.

This can be used to directly access all of the Fl_Input widget's methods.

## ◆ menubutton()

Fl_Menu_Button * Fl_Input_Choice::menubutton | ( |  | ) |
| inline

Returns a pointer to the internal Fl_Menu_Button widget.

This can be used to access any of the methods of the menu button, e.g.

Fl_Input_Choice *choice = new Fl_Input_Choice(100,10,120,25,"Choice:");
[..]
// Print all the items in the choice menu
for ( int t=0; t<choice->menubutton()->size(); t++ ) {
const Fl_Menu_Item &item = choice->menubutton()->menu()[t];
printf("item %d -- label=%s\n", t, item.label() ? item.label() : "(Null)");
}
Fl_Widget::size
void size(int W, int H)
Changes the size of the widget.
Definition: Fl_Widget.H:341

## ◆ resize()

void Fl_Input_Choice::resize | ( | int | X,
|  | int | Y,
|  | int | W,
|  | int | H
| ) |  |
| inlinevirtual

Resizes the Fl_Group widget and all of its children.

The Fl_Group widget first resizes itself, and then it moves and resizes all its children according to the rules documented for Fl_Group::resizable(Fl_Widget*)

See also
  Fl_Group::resizable(Fl_Widget*)
  Fl_Group::resizable()
  Fl_Widget::resize(int,int,int,int)

Reimplemented from Fl_Group.

## ◆ value() [1/2]

void Fl_Input_Choice::value | ( | const char * | val | ) |
| inline

Sets the Fl_Input text field's contents to `val`.

Does not affect the menu selection.

## ◆ value() [2/2]

void Fl_Input_Choice::value | ( | int | val | ) |
| inline

Chooses item# `val` in the menu, and sets the Fl_Input text field to that value.

Any previous text is cleared.

The documentation for this class was generated from the following files:

- Fl_Input_Choice.H
- Fl_Group.cxx

- Copyright © 1998-2021 by Bill Spitzak and others.