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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Provides a class that can contain active TemporaryItem's on a desktop
* When the object is deleted, it also deletes the canvasitem it contains!
* This object should be created/managed by a TemporaryItemList.
* After its lifetime, it fires the timeout signal, afterwards *it deletes itself*.
*
* (part of code inspired by message-stack.cpp)
*
* Authors:
* Johan Engelen
*
* Copyright (C) Johan Engelen 2008 <j.b.c.engelen@utwente.nl>
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <glib.h>
#include "canvas-temporary-item.h"
#include "canvas-item.h"
namespace Inkscape {
namespace Display {
/** lifetime is measured in milliseconds
*/
TemporaryItem::TemporaryItem(CanvasItem *item, guint lifetime, bool deselect_destroy)
: canvasitem(item),
timeout_id(0),
destroy_on_deselect(deselect_destroy)
{
if (lifetime > 0 && destroy_on_deselect) {
g_print ("Warning: lifetime should be 0 when destroy_on_deselect is true\n");
lifetime = 0;
}
// zero lifetime means stay forever, so do not add timeout event.
if (lifetime > 0) {
timeout_id = g_timeout_add(lifetime, &TemporaryItem::_timeout, this);
}
}
TemporaryItem::~TemporaryItem()
{
// when it has not expired yet...
if (timeout_id) {
g_source_remove(timeout_id);
timeout_id = 0;
}
if (canvasitem) {
// destroying the item automatically hides it
delete canvasitem;
canvasitem = nullptr;
}
}
/* static method */
int TemporaryItem::_timeout(void* data) {
TemporaryItem *tempitem = static_cast<TemporaryItem *>(data);
tempitem->timeout_id = 0;
tempitem->signal_timeout.emit(tempitem);
delete tempitem;
return FALSE;
}
} //namespace Display
} /* namespace Inkscape */
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
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