/
homemenuwidget.cpp
191 lines (167 loc) · 5.07 KB
/
homemenuwidget.cpp
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/** @file homemenuwidget.cpp Menu for the Home.
*
* @authors Copyright (c) 2016 Jaakko Keränen <jaakko.keranen@iki.fi>
*
* @par License
* GPL: http://www.gnu.org/licenses/gpl.html
*
* <small>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 2 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</small>
*/
#include "ui/widgets/homemenuwidget.h"
#include "ui/widgets/homeitemwidget.h"
#include "ui/home/columnwidget.h"
using namespace de;
DENG_GUI_PIMPL(HomeMenuWidget)
, DENG2_OBSERVES(ChildWidgetOrganizer, WidgetCreation)
, DENG2_OBSERVES(Asset, StateChange)
{
ui::DataPos selectedIndex = ui::Data::InvalidPos;
ui::DataPos previousSelectedIndex = 0;
ui::Item const *interacted = nullptr;
ui::Item const *interactedAction = nullptr;
Impl(Public *i) : Base(i)
{
self.organizer().audienceForWidgetCreation() += this;
}
void widgetCreatedForItem(GuiWidget &widget, ui::Item const &)
{
if (widget.is<HomeItemWidget>())
{
QObject::connect(&widget, SIGNAL(mouseActivity()),
thisPublic, SLOT(mouseActivityInItem()));
QObject::connect(&widget, SIGNAL(selected()), thisPublic, SLOT(itemSelectionChanged()));
}
}
void assetStateChanged(Asset &asset)
{
if (asset.state() == Asset::Ready)
{
self.assets().audienceForStateChange() -= this; // only scroll once
scrollToSelected();
}
}
void scrollToSelected()
{
if (self.hasRoot())
{
if (auto *widget = self.itemWidget<GuiWidget>(selectedIndex))
{
self.findTopmostScrollable().scrollToWidget(*widget);
}
}
}
};
HomeMenuWidget::HomeMenuWidget(String const &name)
: MenuWidget(name)
, d(new Impl(this))
{
enableScrolling(false);
enablePageKeys(false);
setGridSize(1, ui::Filled, 0, ui::Expand);
margins().setLeftRight("");
layout().setRowPadding(rule("gap"));
}
void HomeMenuWidget::unselectAll()
{
if (d->selectedIndex < items().size())
{
d->selectedIndex = ui::Data::InvalidPos;
// Unselect all items.
for (auto *w : childWidgets())
{
if (auto *item = w->maybeAs<HomeItemWidget>())
{
// Never deselect the currently focused item.
if (root().focus() != item)
{
item->setSelected(false);
}
}
}
}
}
void HomeMenuWidget::restorePreviousSelection()
{
setSelectedIndex(d->previousSelectedIndex);
}
ui::DataPos HomeMenuWidget::selectedIndex() const
{
return d->selectedIndex;
}
void HomeMenuWidget::setSelectedIndex(ui::DataPos index)
{
if (auto *widget = itemWidget<HomeItemWidget>(index))
{
widget->acquireFocus();
// Check if we can scroll to the selected widget right away.
// If not, we are observing the asset and will scroll when it is ready.
if (assets().isReady())
{
d->scrollToSelected();
}
else
{
assets().audienceForStateChange() += d;
}
}
}
void HomeMenuWidget::setInteractedItem(ui::Item const *menuItem, ui::Item const *actionItem)
{
d->interacted = menuItem;
d->interactedAction = actionItem;
}
ColumnWidget *HomeMenuWidget::parentColumn() const
{
for (Widget *i = parentWidget(); i; i = i->parent())
{
if (ColumnWidget *column = i->maybeAs<ColumnWidget>())
{
return column;
}
}
return nullptr;
}
ui::Item const *HomeMenuWidget::interactedItem() const
{
return d->interacted;
}
ui::Item const *HomeMenuWidget::actionItem() const
{
return d->interactedAction;
}
void HomeMenuWidget::mouseActivityInItem()
{
if (auto *clickedWidget = dynamic_cast<HomeItemWidget *>(sender()))
{
emit itemClicked(findItem(*clickedWidget));
}
if (auto *column = parentColumn())
{
emit column->mouseActivity(column);
}
}
void HomeMenuWidget::itemSelectionChanged()
{
if (auto *clickedItem = dynamic_cast<HomeItemWidget *>(sender()))
{
ui::DataPos const newSelection = findItem(*clickedItem);
if (d->selectedIndex != newSelection)
{
// Deselect the previous selection.
if (auto *item = itemWidget<HomeItemWidget>(d->selectedIndex))
{
item->setSelected(false);
}
d->selectedIndex = d->previousSelectedIndex = newSelection;
emit selectedIndexChanged(d->selectedIndex);
}
}
}