squawk/ui/models/reference.cpp

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/*
* Squawk messenger.
* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "reference.h"
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#include <QDebug>
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using namespace Models;
Models::Reference::Reference(Models::Item* original, Models::Item* parent):
Models::Item(reference, {}, parent),
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original(original),
ax(-1),
bx(-1),
cx(-1),
c(false)
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{
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connect(original, &Item::childChanged, this, &Reference::onChildChanged, Qt::QueuedConnection);
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connect(original, &Item::childIsAboutToBeInserted, this, &Reference::onChildIsAboutToBeInserted);
connect(original, &Item::childInserted, this, &Reference::onChildInserted);
connect(original, &Item::childIsAboutToBeRemoved, this, &Reference::onChildIsAboutToBeRemoved);
connect(original, &Item::childRemoved, this, &Reference::onChildRemoved);
connect(original, &Item::childIsAboutToBeMoved, this, &Reference::onChildIsAboutToBeMoved);
connect(original, &Item::childMoved, this, &Reference::onChildMoved);
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original->addReference(this);
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for (int i = 0; i < original->childCount(); i++) {
Reference* ref = new Reference(original->child(i));
Item::appendChild(ref);
}
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}
Models::Reference::~Reference()
{
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if (!destroyingByOriginal) {
original->removeReference(this);
}
disconnect(original, &Item::childChanged, this, &Reference::onChildChanged);
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disconnect(original, &Item::childIsAboutToBeInserted, this, &Reference::onChildIsAboutToBeInserted);
disconnect(original, &Item::childInserted, this, &Reference::onChildInserted);
disconnect(original, &Item::childIsAboutToBeRemoved, this, &Reference::onChildIsAboutToBeRemoved);
disconnect(original, &Item::childRemoved, this, &Reference::onChildRemoved);
disconnect(original, &Item::childIsAboutToBeMoved, this, &Reference::onChildIsAboutToBeMoved);
disconnect(original, &Item::childMoved, this, &Reference::onChildMoved);
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}
int Models::Reference::columnCount() const
{
return original->columnCount();
}
QVariant Models::Reference::data(int column) const
{
return original->data(column);
}
QString Models::Reference::getDisplayedName() const
{
return original->getDisplayedName();
}
Models::Item * Models::Reference::dereference()
{
return original;
}
const Models::Item * Models::Reference::dereferenceConst() const
{
return original;
}
void Models::Reference::appendChild(Models::Item* child)
{
original->appendChild(child);
}
void Models::Reference::removeChild(int index)
{
original->removeChild(index);
}
void Models::Reference::toOfflineState()
{
original->toOfflineState();
}
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void Models::Reference::onChildChanged(Models::Item* item, int row, int col)
{
if (item == original) {
emit childChanged(this, row, col);
} else {
emit childChanged(item, row, col);
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}
}
void Models::Reference::onChildIsAboutToBeInserted(Models::Item* parent, int first, int last)
{
if (parent == original) {
ax = first;
bx = last;
}
}
void Models::Reference::onChildInserted()
{
if (ax != -1 && bx != -1) {
for (int i = ax; i <= bx; ++i) {
Reference* ref = new Reference(original->child(i));
Item::appendChild(ref);
}
ax = -1;
bx = -1;
}
}
void Models::Reference::onChildIsAboutToBeRemoved(Models::Item* parent, int first, int last)
{
if (parent == original) {
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emit childIsAboutToBeRemoved(this, first, last);
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for (int i = first; i <= last; ++i) {
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Reference* ref = static_cast<Reference*>(childItems[first]);
Item::_removeChild(first);
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delete ref;
}
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childRemoved();
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}
}
void Models::Reference::onChildRemoved()
{
}
void Models::Reference::onChildIsAboutToBeMoved(Models::Item* source, int first, int last, Models::Item* destination, int newIndex)
{
if (destination == original) {
if (source != original) {
c = true;
ax = first;
bx = last;
cx = newIndex;
emit childIsAboutToBeMoved(source, first, last, destination, newIndex);
} else {
ax = newIndex;
bx = newIndex + last - first + 1;
}
}
}
void Models::Reference::onChildMoved()
{
if (c) {
std::deque<Item*>::const_iterator beg = childItems.begin() + ax;
std::deque<Item*>::const_iterator end = childItems.begin() + bx + 1;
std::deque<Item*>::const_iterator tgt = childItems.begin() + cx;
std::deque<Item*> temp;
temp.insert(temp.end(), beg, end);
childItems.erase(beg, end);
childItems.insert(tgt, temp.begin(), temp.end());
emit childMoved();
} else {
onChildInserted();
}
}