plasma-framework/extendergroup.cpp

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/*
* Copyright 2009 by Rob Scheepmaker <r.scheepmaker@student.utwente.nl>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "extendergroup.h"
#include <QAction>
#include <QString>
#include <QList>
#include <QtGui/QGraphicsWidget>
#include "applet.h"
#include "extender.h"
#include "extenderitem.h"
#include "theme.h"
#include "private/extendergroup_p.h"
namespace Plasma
{
ExtenderGroup::ExtenderGroup(Extender *parent, uint groupId)
: ExtenderItem(parent, groupId),
d(new ExtenderGroupPrivate(this))
{
connect(extender(), SIGNAL(itemAttached(Plasma::ExtenderItem*)),
this, SLOT(addItemToGroup(Plasma::ExtenderItem*)));
connect(extender(), SIGNAL(itemDetached(Plasma::ExtenderItem*)),
this, SLOT(removeItemFromGroup(Plasma::ExtenderItem*)));
config().writeEntry("isGroup", true);
QAction *expand = new QAction(this);
expand->setVisible(true);
expand->setToolTip(i18n("Show this group."));
connect(expand, SIGNAL(triggered()), this, SLOT(expandGroup()));
addAction("expand", expand);
QAction *collapse = new QAction(this);
collapse->setVisible(false);
collapse->setToolTip(i18n("Hide this group."));
connect(collapse, SIGNAL(triggered()), this, SLOT(collapseGroup()));
addAction("collapse", collapse);
d->themeChanged();
QString groupName;
foreach (ExtenderItem *item, extender()->attachedItems()) {
groupName = item->config().readEntry("group", "");
if (!groupName.isEmpty() && groupName == name()) {
item->setGroup(this);
}
}
if (items().isEmpty() && d->autoHide && !isDetached()) {
hide();
extender()->itemRemovedEvent(this);
}
connect(Plasma::Theme::defaultTheme(), SIGNAL(themeChanged()),
this, SLOT(themeChanged()));
}
ExtenderGroup::~ExtenderGroup()
{
delete d;
}
QList<ExtenderItem*> ExtenderGroup::items() const
{
QList<ExtenderItem*> result;
foreach (ExtenderItem *item, extender()->attachedItems()) {
if (item->group() == this) {
result.append(item);
}
}
return result;
}
bool ExtenderGroup::autoHide() const
{
return d->autoHide;
}
void ExtenderGroup::setAutoHide(bool autoHide)
{
d->autoHide = autoHide;
if (autoHide && items().count() < 2) {
hide();
extender()->itemRemovedEvent(this);
} else if (!autoHide && !isVisible()) {
extender()->itemAddedEvent(this);
show();
}
}
void ExtenderGroup::expandGroup()
{
d->collapsed = false;
action("collapse")->setVisible(true);
action("expand")->setVisible(false);
foreach (ExtenderItem *item, extender()->attachedItems()) {
if (item->group() == this) {
item->show();
extender()->itemAddedEvent(item);
}
}
}
void ExtenderGroup::collapseGroup()
{
d->collapsed = true;
action("collapse")->setVisible(false);
action("expand")->setVisible(true);
foreach (ExtenderItem *item, extender()->attachedItems()) {
if (item != this && item->group() == this) {
item->hide();
extender()->itemRemovedEvent(item);
}
}
}
ExtenderGroupPrivate::ExtenderGroupPrivate(ExtenderGroup *group)
: collapsed(true),
autoHide(true)
{
q = group;
}
ExtenderGroupPrivate::~ExtenderGroupPrivate()
{
}
void ExtenderGroupPrivate::addItemToGroup(Plasma::ExtenderItem *item)
{
if (item->group() == q) {
int itemCount = q->items().count();
if (collapsed && !(autoHide && itemCount == 1)) {
//the group is collapsed, so hide the new item unless there's only one item and autohide
//is true, in which case we hide this group, and not the item in it.
q->extender()->itemRemovedEvent(item);
item->hide();
} else {
//the group isn't collapsed so show and readd this item to the extender, which takes
//care of placing the new item directly under the group widget.
q->extender()->itemAddedEvent(item);
item->show();
}
if (!q->isVisible() && (itemCount > 1 || !autoHide)) {
//show the group if needed, depending on autoHide policy.
q->extender()->itemAddedEvent(q);
q->show();
if (collapsed) {
q->extender()->itemRemovedEvent(q->items().first());
q->items().first()->hide();
}
}
}
}
void ExtenderGroupPrivate::removeItemFromGroup(Plasma::ExtenderItem *item)
{
if (item->group() == q) {
if (q->items().count() < 2 && autoHide && !q->isDetached()) {
q->extender()->itemRemovedEvent(q);
q->hide();
}
if (q->items().count() == 1 && autoHide) {
q->extender()->itemAddedEvent(q->items().first());
q->items().first()->show();
}
}
}
void ExtenderGroupPrivate::themeChanged()
{
Plasma::Svg *svg = new Plasma::Svg(q);///Who deletes the svg? (Looks like a memory hog/leak on multiple theme changes)
svg->setImagePath("widgets/configuration-icons");
svg->resize();
q->action("expand")->setIcon(QIcon(svg->pixmap("restore")));
q->action("collapse")->setIcon(QIcon(svg->pixmap("collapse")));
}
} // Plasma namespace
#include "extendergroup.moc"