plasma-framework/declarativeimports/plasmacomponents/qmenu.cpp
2012-09-21 14:23:41 +02:00

302 lines
8.1 KiB
C++

/***************************************************************************
* Copyright 2011 Viranch Mehta <viranch.mehta@gmail.com> *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA . *
***************************************************************************/
#include "qmenu.h"
#include <QApplication>
#include <QDebug>
#include <QDesktopWidget>
#include <QGraphicsObject>
#include <QGraphicsView>
#include <QDeclarativeItem>
#include "plasmacomponentsplugin.h"
QMenuProxy::QMenuProxy (QObject *parent)
: QObject(parent),
m_status(DialogStatus::Closed)
{
m_menu = new QMenu(0);
connect(m_menu, SIGNAL(triggered(QAction *)),
this, SLOT(itemTriggered(QAction *)));
}
QMenuProxy::~QMenuProxy()
{
delete m_menu;
}
QDeclarativeListProperty<QMenuItem> QMenuProxy::content()
{
return QDeclarativeListProperty<QMenuItem>(this, m_items);
}
int QMenuProxy::actionCount() const
{
return m_items.count();
}
QMenuItem *QMenuProxy::action(int index) const
{
return m_items.at(index);
}
DialogStatus::Status QMenuProxy::status() const
{
return m_status;
}
QObject *QMenuProxy::visualParent() const
{
return m_visualParent.data();
}
void QMenuProxy::setVisualParent(QObject *parent)
{
if (m_visualParent.data() == parent) {
return;
}
//if the old parent was a QAction, disconnect the menu from it
QAction *action = qobject_cast<QAction *>(m_visualParent.data());
if (action) {
action->setMenu(0);
m_menu->clear();
}
//if parent is a QAction, become a submenu
action = qobject_cast<QAction *>(parent);
if (action) {
action->setMenu(m_menu);
m_menu->clear();
foreach(QMenuItem* item, m_items) {
m_menu->addAction(item);
}
m_menu->updateGeometry();
}
m_visualParent = parent;
emit visualParentChanged();
}
bool QMenuProxy::event(QEvent *event)
{
switch (event->type()) {
case QEvent::ChildAdded: {
QChildEvent *ce = static_cast<QChildEvent *>(event);
QMenuItem *mi = qobject_cast<QMenuItem *>(ce->child());
//FIXME: linear complexity here
if (mi && !m_items.contains(mi)) {
m_menu->addAction(mi);
m_items << mi;
}
break;
}
case QEvent::ChildRemoved: {
QChildEvent *ce = static_cast<QChildEvent *>(event);
QMenuItem *mi = qobject_cast<QMenuItem *>(ce->child());
//FIXME: linear complexity here
if (mi) {
m_menu->removeAction(mi);
m_items.removeAll(mi);
}
break;
}
default:
break;
}
return QObject::event(event);
}
void QMenuProxy::clearMenuItems()
{
qDeleteAll(m_items);
m_items.clear();
}
void QMenuProxy::addMenuItem(const QString &text)
{
QMenuItem *item = new QMenuItem(this);
item->setText(text);
m_menu->addAction(item);
m_items << item;
}
void QMenuProxy::addMenuItem(QMenuItem *item)
{
m_menu->addAction(item);
m_items << item;
}
void QMenuProxy::itemTriggered(QAction *action)
{
QMenuItem *item = qobject_cast<QMenuItem *>(action);
if (item) {
emit triggered(item);
int index = m_items.indexOf(item);
if (index > -1) {
emit triggeredIndex(index);
}
}
}
void QMenuProxy::open(int x, int y)
{
m_menu->clear();
foreach(QMenuItem* item, m_items) {
m_menu->addAction (item);
}
QPoint screenPos;
QGraphicsObject *parentItem;
if (m_visualParent) {
parentItem = qobject_cast<QGraphicsObject *>(m_visualParent.data());
} else {
parentItem = qobject_cast<QGraphicsObject *>(parent());
}
if (!parentItem || !parentItem->scene()) {
m_menu->popup(QPoint(0, 0));
m_status = DialogStatus::Open;
emit statusChanged();
return;
}
QList<QGraphicsView*> views = parentItem->scene()->views();
if (views.size() < 1) {
m_menu->popup(QPoint(0, 0));
m_status = DialogStatus::Open;
emit statusChanged();
return;
}
QGraphicsView *view = 0;
if (views.size() == 1) {
view = views[0];
} else {
QGraphicsView *found = 0;
QGraphicsView *possibleFind = 0;
foreach (QGraphicsView *v, views) {
if (v->sceneRect().intersects(parentItem->sceneBoundingRect()) ||
v->sceneRect().contains(parentItem->scenePos())) {
if (v->isActiveWindow()) {
found = v;
} else {
possibleFind = v;
}
}
}
view = found ? found : possibleFind;
}
if (view) {
screenPos = view->mapToGlobal(view->mapFromScene(parentItem->scenePos()+ QPoint(x, y)));
} else {
screenPos = QApplication::activeWindow()->mapToGlobal(QPoint(x, y));
}
m_menu->popup(screenPos);
m_status = DialogStatus::Open;
emit statusChanged();
}
void QMenuProxy::open()
{
m_menu->clear();
foreach(QMenuItem* item, m_items) {
m_menu->addAction (item);
}
m_menu->updateGeometry();
QGraphicsObject *parentItem;
if (m_visualParent) {
parentItem = qobject_cast<QGraphicsObject *>(m_visualParent.data());
} else {
parentItem = qobject_cast<QGraphicsObject *>(parent());
}
if (!parentItem || !parentItem->scene()) {
m_menu->popup(QPoint(0, 0));
m_status = DialogStatus::Open;
emit statusChanged();
return;
}
QList<QGraphicsView*> views = parentItem->scene()->views();
if (views.size() < 1) {
m_menu->popup(QPoint(0, 0));
m_status = DialogStatus::Open;
emit statusChanged();
return;
}
QGraphicsView *view = 0;
if (views.size() == 1) {
view = views[0];
} else {
QGraphicsView *found = 0;
QGraphicsView *possibleFind = 0;
foreach (QGraphicsView *v, views) {
if (v->sceneRect().intersects(parentItem->sceneBoundingRect()) ||
v->sceneRect().contains(parentItem->scenePos())) {
if (v->isActiveWindow()) {
found = v;
} else {
possibleFind = v;
}
}
}
view = found ? found : possibleFind;
}
if (!view) {
m_menu->popup(QPoint(0, 0));
m_status = DialogStatus::Open;
emit statusChanged();
return;
}
const QRect avail = QApplication::desktop()->availableGeometry(view);
QPoint menuPos = view->mapToGlobal(view->mapFromScene(parentItem->scenePos()+QPoint(0, parentItem->boundingRect().height())));
if (menuPos.y() + m_menu->sizeHint().height() > avail.bottom()) {
menuPos = view->mapToGlobal(view->mapFromScene(parentItem->scenePos() - QPoint(0, m_menu->sizeHint().height())));
}
m_menu->popup(menuPos);
m_status = DialogStatus::Open;
emit statusChanged();
}
void QMenuProxy::close()
{
m_menu->hide();
m_status = DialogStatus::Closed;
emit statusChanged();
}
#include "qmenu.moc"