lyx_mirror/src/frontends/xforms/FormBase.C

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/**
* \file FormBase.C
* Copyright 2000-2001 The LyX Team.
* See the file COPYING.
*
* \author Angus Leeming, a.leeming@ic.ac.uk
*/
#include <config.h>
#ifdef __GNUG__
#pragma implementation
#endif
#include "Dialogs.h"
#include "FormBase.h"
#include "xformsBC.h"
#include "xforms_resize.h"
#include "Tooltips.h"
#include "support/LAssert.h"
#include FORMS_H_LOCATION
extern "C" {
// Callback function invoked by xforms when the dialog is closed by the
// window manager
static int C_WMHideCB(FL_FORM * form, void *);
// Callback function invoked by the xforms pre- and post-handler routines
static int C_PrehandlerCB(FL_OBJECT *, int, FL_Coord, FL_Coord, int, void *);
} // extern "C"
FormBase::FormBase(ControlButtons & c, Dialogs & d,
string const & t, bool allowResize)
: ViewBC<xformsBC>(c), minw_(0), minh_(0), allow_resize_(allowResize),
title_(t), tooltips_(new Tooltips(d))
{}
FormBase::~FormBase()
{
delete tooltips_;
}
Tooltips & FormBase::tooltips()
{
return *tooltips_;
}
void FormBase::redraw()
{
if (form() && form()->visible)
fl_redraw_form(form());
}
void FormBase::show()
{
if (!form()) {
build();
}
// use minw_ to flag whether the dialog has ever been shown
// (Needed now that build() is/should be called from the controller)
if (minw_ == 0) {
double const scale = scale_to_fit_tabs(form());
if (scale > 1.001)
scale_form(form(), scale);
bc().refresh();
// work around dumb xforms sizing bug
minw_ = form()->w;
minh_ = form()->h;
fl_set_form_atclose(form(), C_WMHideCB, 0);
}
fl_freeze_form(form());
update(); // make sure its up-to-date
fl_unfreeze_form(form());
if (form()->visible) {
fl_raise_form(form());
/* This XMapWindow() will hopefully ensure that
* iconified dialogs are de-iconified. Mad props
* out to those crazy Xlib guys for forgetting a
* XDeiconifyWindow(). At least WindowMaker, when
* being notified of the redirected MapRequest will
* specifically de-iconify. From source, fvwm2 seems
* to do the same.
*/
XMapWindow(fl_get_display(), form()->window);
} else {
// calls to fl_set_form_minsize/maxsize apply only to the next
// fl_show_form(), so this comes first.
fl_set_form_minsize(form(), minw_, minh_);
if (!allow_resize_)
fl_set_form_maxsize(form(), minw_, minh_);
fl_show_form(form(),
FL_PLACE_MOUSE | FL_FREE_SIZE,
(controller_.IconifyWithMain() ? FL_TRANSIENT : 0),
title_.c_str());
}
tooltips().set();
}
void FormBase::hide()
{
// xforms sometimes tries to process a hint-type MotionNotify, and
// use XQueryPointer, without verifying if the window still exists.
// So we try to clear out motion events in the queue before the
// DestroyNotify
XSync(fl_get_display(), false);
if (form() && form()->visible)
fl_hide_form(form());
}
void FormBase::setPrehandler(FL_OBJECT * ob)
{
lyx::Assert(ob);
fl_set_object_prehandler(ob, C_PrehandlerCB);
}
void FormBase::InputCB(FL_OBJECT * ob, long data)
{
// It is possible to set the choice to 0 when using the
// keyboard shortcuts. This work-around deals with the problem.
if (ob && ob->objclass == FL_CHOICE && fl_get_choice(ob) < 1) {
fl_set_choice(ob, 1);
}
bc().input(input(ob, data));
}
ButtonPolicy::SMInput FormBase::input(FL_OBJECT *, long)
{
return ButtonPolicy::SMI_VALID;
}
namespace {
FormBase * GetForm(FL_OBJECT * ob)
{
lyx::Assert(ob && ob->form && ob->form->u_vdata);
FormBase * ptr = static_cast<FormBase *>(ob->form->u_vdata);
return ptr;
}
} // namespace anon
extern "C" {
void C_FormBaseApplyCB(FL_OBJECT * ob, long)
{
GetForm(ob)->ApplyButton();
}
void C_FormBaseOKCB(FL_OBJECT * ob, long)
{
GetForm(ob)->OKButton();
}
void C_FormBaseCancelCB(FL_OBJECT * ob, long)
{
FormBase * form = GetForm(ob);
form->CancelButton();
}
void C_FormBaseRestoreCB(FL_OBJECT * ob, long)
{
GetForm(ob)->RestoreButton();
}
void C_FormBaseInputCB(FL_OBJECT * ob, long d)
{
GetForm(ob)->InputCB(ob, d);
}
static int C_WMHideCB(FL_FORM * form, void *)
{
// Close the dialog cleanly, even if the WM is used to do so.
lyx::Assert(form && form->u_vdata);
FormBase * ptr = static_cast<FormBase *>(form->u_vdata);
ptr->CancelButton();
return FL_CANCEL;
}
static int C_PrehandlerCB(FL_OBJECT * ob, int event,
FL_Coord, FL_Coord, int key, void *)
{
// Note that the return value is important in the pre-emptive handler.
// Don't return anything other than 0.
lyx::Assert(ob);
// Don't Assert this one, as it can happen quite naturally when things
// are being deleted in the d-tor.
//Assert(ob->form);
if (!ob->form) return 0;
FormBase * ptr = static_cast<FormBase *>(ob->form->u_vdata);
if (ptr)
ptr->PrehandlerCB(ob, event, key);
return 0;
}
} // extern "C"