lyx_mirror/src/frontends/xforms/DropDown.C

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/**
* \file DropDown.C
* Copyright 2001 the LyX Team
* Read the file COPYING
*
* \author John Levon, moz@compsoc.man.ac.uk
*/
#include <config.h>
#ifdef __GNUG__
#pragma implementation
#endif
#include "DropDown.h"
#include "xforms_helpers.h"
#include FORMS_H_LOCATION
#include <iostream>
#include <cctype>
#ifndef CXX_GLOBAL_CSTD
using std::isprint;
#endif
using std::vector;
namespace {
extern "C" void C_CompletedCB(FL_OBJECT * ob, long)
{
DropDown * d = static_cast<DropDown*>(ob->u_vdata);
d->completed();
}
extern "C" int C_PeekCB(FL_FORM * form, void *xev)
{
DropDown * d = static_cast<DropDown*>(form->u_vdata);
return d->peek(static_cast<XEvent*>(xev));
}
} // namespace anon
DropDown::DropDown(FL_OBJECT * ob)
{
form_ = fl_bgn_form(FL_NO_BOX, ob->w, 100);
fl_add_box(FL_UP_BOX, 0, 0, ob->w, 100, "");
browser_ = fl_add_browser(FL_SELECT_BROWSER, 0, 0, ob->w, 100, "");
form_->u_vdata = this;
browser_->u_vdata = this;
fl_set_object_callback(browser_, C_CompletedCB, 0);
fl_register_raw_callback(form_, KeyPressMask|ButtonPressMask, C_PeekCB);
fl_end_form();
}
DropDown::~DropDown()
{
if (form_->visible)
fl_hide_form(form_);
fl_free_form(form_);
}
void DropDown::select(vector<string> const & choices, int x, int y, int w)
{
if (choices.empty())
return;
fl_set_form_geometry(form_, x, y-100, w, 100);
fl_clear_browser(browser_);
vector<string>::const_iterator cit = choices.begin();
vector<string>::const_iterator end = choices.end();
for (; cit != end; ++cit) {
fl_add_browser_line(browser_, cit->c_str());
}
fl_select_browser_line(browser_, 1);
fl_show_form(form_, FL_PLACE_POSITION, FL_NOBORDER, "");
XGrabPointer(fl_get_display(), form_->window, false,
ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
GrabModeAsync, GrabModeAsync, 0, 0, 0);
XFlush(fl_get_display());
}
void DropDown::line_up()
{
if (fl_get_browser(browser_) > 1)
fl_select_browser_line(browser_, fl_get_browser(browser_) - 1);
if (fl_get_browser(browser_) >= fl_get_browser_topline(browser_) +
fl_get_browser_screenlines(browser_))
fl_set_browser_topline(browser_, fl_get_browser(browser_)
- fl_get_browser_screenlines(browser_) + 1);
if (fl_get_browser(browser_) < fl_get_browser_topline(browser_))
fl_set_browser_topline(browser_, fl_get_browser(browser_));
}
void DropDown::line_down()
{
if (fl_get_browser(browser_) < fl_get_browser_maxline(browser_))
fl_select_browser_line(browser_, fl_get_browser(browser_) + 1);
if (fl_get_browser(browser_) >= fl_get_browser_topline(browser_) +
fl_get_browser_screenlines(browser_))
fl_set_browser_topline(browser_, fl_get_browser(browser_)
- fl_get_browser_screenlines(browser_) + 1);
if (fl_get_browser(browser_) < fl_get_browser_topline(browser_))
fl_set_browser_topline(browser_, fl_get_browser(browser_));
}
int DropDown::peek(XEvent * xev)
{
int x,y;
unsigned int keymask;
fl_get_mouse(&x, &y, &keymask);
if (xev->type == ButtonPress) {
if (!(x >= form_->x && x <= (form_->x + form_->w) &&
y >= form_->y && y << (form_->y + form_->h))) {
fl_hide_form(form_);
return 1;
}
XUngrabPointer(fl_get_display(), CurrentTime);
} else if (xev->type == KeyPress) {
char s_r[10]; s_r[9] = '\0';
KeySym keysym_return;
XLookupString(&xev->xkey, s_r, 10, &keysym_return, 0);
switch (keysym_return) {
case XK_Down:
#ifdef XK_KP_Down
case XK_KP_Down:
#endif
line_down();
return 1;
case XK_Up:
#ifdef XK_KP_Up
case XK_KP_Up:
#endif
line_up();
return 1;
case XK_Return:
#ifdef XK_KP_Enter
case XK_KP_Enter:
#endif
completed();
return 1;
case XK_Escape:
fl_deselect_browser(browser_);
completed();
return 1;
default:
// FIXME: if someone has a got a way to
// convince the event to fall back to the
// minibuffer, I'm glad to hear it.
// fl_XPutBackEvent() doesn't work.
// This is a bit less elegant perhaps, but works
// well enough. Angus 11 Jan 2002
if (s_r[0] && isprint(s_r[0])) {
key_pressed(s_r[0]);
return 1;
}
}
}
return 0;
}
void DropDown::completed()
{
XUngrabPointer(fl_get_display(), CurrentTime);
fl_hide_form(form_);
result(getString(browser_));
}
void DropDown::key_pressed(char c)
{
XUngrabPointer(fl_get_display(), CurrentTime);
fl_hide_form(form_);
keypress(c);
}