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products/sources/formale Sprachen/C/Lyx/src/ (Lyx Textverarbeitung ^©) Datei vom 26.9.1998 mit Größe 4 kB

Quelle combox.h Sprache: C

// -*- C++ -*-
/*
*  Combox: A combination of two objects (a button and a browser) is
*          encapsulated to get a combobox-like object. All XForms
*          functions are hidden.
*
*  GNU Copyleft (C) 1996 Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
*                        and the LyX Team.
*
*  Dependencies:  Only XForms, but created to be used with LyX.
*
*/

/* Change log:
*
*  2/06/1996,   Alejandro Aguilar Sierra
*    Created and tested.
*
*  4/06/1996,   Alejandro Aguilar Sierra
*    Added droplist mode (a button with a black down arrow at right)
*    and support for middle and right buttons, as XForms choice object.
*/

#ifndef _COMBOX_H_
#define _COMBOX_H_

#ifdef __GNUG__
#pragma interface
#endif

#include FORMS_H_LOCATION
#include <stdlib.h>

///
enum combox_type {
///
FL_COMBOX_NORMAL,
///
FL_COMBOX_DROPLIST,
///
FL_COMBOX_INPUT
};

/// callback prototype
typedef void (*FL_COMBO_CB) (int, void*);
/// pre post prototype
typedef void (*FL_COMBO_PRE_POST) ();

///
class Combox {
public:
///
Combox(combox_type t=FL_COMBOX_NORMAL);
///
~Combox();

/** To add this object to a form. Note that there are two heights
for normal (button) and expanded (browser) mode each. */
void add(int x, int y, int w, int hmin, int hmax);

/// Add lines. Same as for fl_browser object
void addline(char const*);
/// Add lines. Same as for fl_browser object
void addto(char const*);

/// Returns the selected item
int get();

/// Returns a pointer to the selected line of text
char const*getline();

///  Select an arbitrary item
void select(int);
///
        bool select_text(char const*);

///  Clear all the list
void clear();

/// Is the combox cleared (empty)
bool empty() { return is_empty; }

/// Remove the objects from the form they are in.
void remove();

/**  Assign a callback to this object. The callback should be a void
function with a int and a void pointer as parameters. */
void setcallback(FL_COMBO_CB, void *);

        ///  Pre handler
void setpre(FL_COMBO_PRE_POST);
/// Post handler
void setpost(FL_COMBO_PRE_POST);

///  XForms attributes
void resize(unsigned);
///
void gravity(unsigned, unsigned);
///
void activate();
///
void deactivate();
///
        void shortcut(char const*, int);
///
void Redraw();
///
void Show();
protected:
        /// At least Hide should not be public
void Hide(int who = 0);
///
FL_OBJECT *browser;
private:
///
combox_type type;
///
        int bw, bh;
///
int sel;
///
bool is_empty;
///
static void combo_cb(FL_OBJECT *, long);
///
static void input_cb(FL_OBJECT *, long);
///
        static int  peek_event(FL_FORM *, void *);
///
FL_COMBO_CB callback;
///
void *cb_arg;
///
FL_COMBO_PRE_POST _pre;
///
FL_COMBO_PRE_POST _post;
///
FL_OBJECT *button;
///
FL_OBJECT *label;
///
        FL_FORM* form;
};

//-----------------  Inline methods  ---------------------------

inline
void Combox::addto(char const* text)
{
if (browser) {
  fl_addto_browser(browser, text);
  is_empty = false;
}
}

inline
void Combox::resize(unsigned r)
{
   fl_set_object_resize(button, r);
   if (label!=button) fl_set_object_resize(label, r);
}

inline
void Combox::gravity(unsigned g1, unsigned g2)
{
   fl_set_object_gravity(button, g1, g2);
   if (label!=button) fl_set_object_gravity(label, g1, g2);
}

inline
void Combox::shortcut(char const* s, int i)
{
   if (button)
      fl_set_object_shortcut(button,s,i);
}

inline
void Combox::setcallback(FL_COMBO_CB cb, void *a = NULL)
{
   callback = cb;
   cb_arg = a;
}

inline
void Combox::setpre(FL_COMBO_PRE_POST cb)
{
_pre = cb;
}

inline
void Combox::setpost(FL_COMBO_PRE_POST cb)
{
_post = cb;
}

inline
int Combox::get()
{
   return sel;
}

inline
char const*Combox::getline()
{
    if (type==FL_COMBOX_INPUT)
      return fl_get_input(label);
    else
      return ((browser) ? fl_get_browser_line(browser, sel): (char const*)NULL);
}

#endif

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