transmission/qt/FileTreeView.cc

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// This file Copyright © 2009-2022 Mnemosyne LLC.
// It may be used under GPLv2 (SPDX: GPL-2.0), GPLv3 (SPDX: GPL-3.0),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#include <algorithm>
#include <cassert>
#include <QHeaderView>
#include <QMenu>
#include <QQueue>
#include <QResizeEvent>
#include <QSortFilterProxyModel>
#include <libtransmission/transmission.h> // priorities
#include "FileTreeDelegate.h"
#include "FileTreeItem.h"
#include "FileTreeModel.h"
#include "FileTreeView.h"
#include "Formatter.h"
#include "Utils.h"
namespace
{
char const* const PriorityKey = "priority";
}
FileTreeView::FileTreeView(QWidget* parent, bool is_editable)
: QTreeView(parent)
, model_(new FileTreeModel(this, is_editable))
, proxy_(new QSortFilterProxyModel(this))
, delegate_(new FileTreeDelegate(this))
{
proxy_->setSourceModel(model_);
proxy_->setSortRole(FileTreeModel::SortRole);
proxy_->setSortCaseSensitivity(Qt::CaseInsensitive);
setModel(proxy_);
setItemDelegate(delegate_);
sortByColumn(FileTreeModel::COL_NAME, Qt::AscendingOrder);
connect(this, &QAbstractItemView::clicked, this, &FileTreeView::onClicked);
connect(model_, &FileTreeModel::openRequested, this, &FileTreeView::openRequested);
connect(model_, &FileTreeModel::pathEdited, this, &FileTreeView::pathEdited);
connect(model_, &FileTreeModel::priorityChanged, this, &FileTreeView::priorityChanged);
connect(model_, &FileTreeModel::wantedChanged, this, &FileTreeView::wantedChanged);
}
void FileTreeView::onClicked(QModelIndex const& proxy_index)
{
QModelIndex const model_index = proxy_->mapToSource(proxy_index);
if (model_index.column() == FileTreeModel::COL_WANTED)
{
model_->twiddleWanted(QModelIndexList() << model_index);
}
else if (model_index.column() == FileTreeModel::COL_PRIORITY)
{
model_->twiddlePriority(QModelIndexList() << model_index);
}
}
void FileTreeView::resizeEvent(QResizeEvent* event)
{
QTreeView::resizeEvent(event);
// this is kind of a hack to get the last four columns be the
// right size, and to have the filename column use whatever
// space is left over...
int left = event->size().width() - 1;
for (int column = 0; column < FileTreeModel::NUM_COLUMNS; ++column)
{
if (column == FileTreeModel::COL_NAME)
{
continue;
}
int min_width = 0;
QStringList item_texts;
switch (column)
{
case FileTreeModel::COL_SIZE:
for (int s = Formatter::get().B; s <= Formatter::get().TB; ++s)
{
item_texts
<< (QStringLiteral("999.9 ") + Formatter::get().unitStr(Formatter::MEM, static_cast<Formatter::Size>(s)));
}
break;
case FileTreeModel::COL_PROGRESS:
item_texts << QStringLiteral(" 100% ");
break;
case FileTreeModel::COL_WANTED:
min_width = 20;
break;
case FileTreeModel::COL_PRIORITY:
item_texts << FileTreeItem::tr("Low") << FileTreeItem::tr("Normal") << FileTreeItem::tr("High")
<< FileTreeItem::tr("Mixed");
break;
}
int item_width = 0;
for (QString const& item_text : item_texts)
{
item_width = std::max(item_width, Utils::measureViewItem(this, item_text));
}
QString const header_text = model_->headerData(column, Qt::Horizontal).toString();
int header_width = Utils::measureHeaderItem(this->header(), header_text);
int const width = std::max(min_width, std::max(item_width, header_width));
setColumnWidth(column, width);
left -= width;
}
setColumnWidth(FileTreeModel::COL_NAME, std::max(left, 0));
}
void FileTreeView::keyPressEvent(QKeyEvent* event)
{
if ((state() != EditingState) && (event->key() == Qt::Key_Space))
{
// handle using the keyboard to toggle the
// wanted/unwanted state or the file priority
Qt::KeyboardModifiers const modifiers = event->modifiers();
if (modifiers == Qt::NoModifier)
{
model_->twiddleWanted(selectedSourceRows());
return;
}
if (modifiers == Qt::ShiftModifier)
{
model_->twiddlePriority(selectedSourceRows());
return;
}
}
QTreeView::keyPressEvent(event);
}
void FileTreeView::mouseDoubleClickEvent(QMouseEvent* event)
{
QModelIndex const index = currentIndex();
if (!index.isValid() || index.column() == FileTreeModel::COL_WANTED || index.column() == FileTreeModel::COL_PRIORITY)
{
return;
}
if (openSelectedItem())
{
return;
}
QTreeView::mouseDoubleClickEvent(event);
}
void FileTreeView::contextMenuEvent(QContextMenuEvent* event)
{
QModelIndex const root_index = model_->index(0, 0);
if (!root_index.isValid())
{
return;
}
if (context_menu_ == nullptr)
{
initContextMenu();
}
context_menu_->popup(event->globalPos());
}
void FileTreeView::update(FileList const& files, bool update_fields)
{
bool const model_was_empty = proxy_->rowCount() == 0;
for (TorrentFile const& file : files)
{
model_->addFile(file.index, file.filename, file.wanted, file.priority, file.size, file.have, update_fields);
}
if (model_was_empty)
{
expand(proxy_->index(0, 0));
}
proxy_->sort(header()->sortIndicatorSection(), header()->sortIndicatorOrder());
}
void FileTreeView::clear()
{
model_->clear();
}
void FileTreeView::setEditable(bool editable)
{
model_->setEditable(editable);
}
bool FileTreeView::edit(QModelIndex const& index, EditTrigger trigger, QEvent* event)
{
if (selectionModel()->selectedRows().size() != 1)
{
return false;
}
QModelIndex const name_index = index.sibling(index.row(), FileTreeModel::COL_NAME);
if (editTriggers().testFlag(trigger))
{
selectionModel()->setCurrentIndex(name_index, QItemSelectionModel::NoUpdate);
}
return QTreeView::edit(name_index, trigger, event);
}
void FileTreeView::checkSelectedItems()
{
model_->setWanted(selectedSourceRows(), true);
}
void FileTreeView::uncheckSelectedItems()
{
model_->setWanted(selectedSourceRows(), false);
}
void FileTreeView::onlyCheckSelectedItems()
{
QModelIndex const root_index = model_->index(0, 0);
if (!root_index.isValid())
{
return;
}
QModelIndexList wanted_indices = selectedSourceRows();
model_->setWanted(wanted_indices, true);
std::sort(wanted_indices.begin(), wanted_indices.end());
QSet<QModelIndex> wanted_indices_parents;
for (QModelIndex const& i : wanted_indices)
{
for (QModelIndex p = i.parent(); p.isValid(); p = p.parent())
{
wanted_indices_parents.insert(p);
}
}
QQueue<QModelIndex> parents_queue;
parents_queue.enqueue(root_index);
QModelIndexList unwanted_indices;
while (!parents_queue.isEmpty())
{
QModelIndex const parent_index = parents_queue.dequeue();
if (std::binary_search(wanted_indices.begin(), wanted_indices.end(), parent_index))
{
continue;
}
auto const* parent_model = parent_index.model();
for (int i = 0, count = model_->rowCount(parent_index); i < count; ++i)
{
QModelIndex const child_index = parent_model->index(i, 0, parent_index);
int const child_check_state = child_index.data(FileTreeModel::WantedRole).toInt();
if (child_check_state == Qt::Unchecked ||
std::binary_search(wanted_indices.begin(), wanted_indices.end(), child_index))
{
continue;
}
if (child_check_state == Qt::Checked && child_index.data(FileTreeModel::FileIndexRole).toInt() >= 0)
{
unwanted_indices << child_index;
}
else if (!wanted_indices_parents.contains(child_index))
{
unwanted_indices << child_index;
}
else
{
parents_queue.enqueue(child_index);
}
}
}
model_->setWanted(unwanted_indices, false);
}
void FileTreeView::setSelectedItemsPriority()
{
auto const* action = qobject_cast<QAction const*>(sender());
assert(action != nullptr);
model_->setPriority(selectedSourceRows(), action->property(PriorityKey).toInt());
}
bool FileTreeView::openSelectedItem()
{
return model_->openFile(proxy_->mapToSource(currentIndex()));
}
void FileTreeView::renameSelectedItem()
{
QTreeView::edit(currentIndex());
}
void FileTreeView::refreshContextMenuActionsSensitivity()
{
assert(context_menu_ != nullptr);
QModelIndexList const selected_rows = selectionModel()->selectedRows();
Qt::CheckState const check_state = getCumulativeCheckState(selected_rows);
bool const have_selection = !selected_rows.isEmpty();
bool const have_single_selection = selected_rows.size() == 1;
bool const have_unchecked = check_state == Qt::Unchecked || check_state == Qt::PartiallyChecked;
bool const have_checked = check_state == Qt::Checked || check_state == Qt::PartiallyChecked;
check_selected_action_->setEnabled(have_unchecked);
uncheck_selected_action_->setEnabled(have_checked);
only_check_selected_action_->setEnabled(have_selection);
priority_menu_->setEnabled(have_selection);
open_action_->setEnabled(
have_single_selection && selected_rows.first().data(FileTreeModel::FileIndexRole).toInt() >= 0 &&
selected_rows.first().data(FileTreeModel::CompleteRole).toBool());
rename_action_->setEnabled(have_single_selection);
}
void FileTreeView::initContextMenu()
{
context_menu_ = new QMenu(this);
check_selected_action_ = context_menu_->addAction(tr("Check Selected"), this, SLOT(checkSelectedItems()));
uncheck_selected_action_ = context_menu_->addAction(tr("Uncheck Selected"), this, SLOT(uncheckSelectedItems()));
only_check_selected_action_ = context_menu_->addAction(tr("Only Check Selected"), this, SLOT(onlyCheckSelectedItems()));
context_menu_->addSeparator();
priority_menu_ = context_menu_->addMenu(tr("Priority"));
high_priority_action_ = priority_menu_->addAction(FileTreeItem::tr("High"), this, SLOT(setSelectedItemsPriority()));
normal_priority_action_ = priority_menu_->addAction(FileTreeItem::tr("Normal"), this, SLOT(setSelectedItemsPriority()));
low_priority_action_ = priority_menu_->addAction(FileTreeItem::tr("Low"), this, SLOT(setSelectedItemsPriority()));
high_priority_action_->setProperty(PriorityKey, TR_PRI_HIGH);
normal_priority_action_->setProperty(PriorityKey, TR_PRI_NORMAL);
low_priority_action_->setProperty(PriorityKey, TR_PRI_LOW);
context_menu_->addSeparator();
open_action_ = context_menu_->addAction(tr("Open"), this, SLOT(openSelectedItem()));
rename_action_ = context_menu_->addAction(tr("Rename..."), this, SLOT(renameSelectedItem()));
connect(context_menu_, &QMenu::aboutToShow, this, &FileTreeView::refreshContextMenuActionsSensitivity);
}
QModelIndexList FileTreeView::selectedSourceRows(int column) const
{
QModelIndexList indices;
for (QModelIndex const& i : selectionModel()->selectedRows(column))
{
indices << proxy_->mapToSource(i);
}
return indices;
}
Qt::CheckState FileTreeView::getCumulativeCheckState(QModelIndexList const& indices)
{
bool have_checked = false;
bool have_unchecked = false;
for (QModelIndex const& i : indices)
{
switch (i.data(FileTreeModel::WantedRole).toInt())
{
case Qt::Checked:
have_checked = true;
break;
case Qt::Unchecked:
have_unchecked = true;
break;
case Qt::PartiallyChecked:
return Qt::PartiallyChecked;
}
if (have_checked && have_unchecked)
{
return Qt::PartiallyChecked;
}
}
return have_checked ? Qt::Checked : Qt::Unchecked;
}