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Couple of improvements to applet drag&drop:

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* Only move applet to toplevel window when overlapping other plasma views, ignoring other windows and such.
* Drag & drop now works reasonably well when using multiple desktop containments ('activities'), both when
  zoomed in as when zoomed out. Only a couple of issues remaining.
* Containment's addApplet function now cleans up the pointer to the applethandle in the preview containment,
  Avoiding some nasty crashes when moving applets between containments.


svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=809841
This commit is contained in:
Rob Scheepmaker 2008-05-19 16:20:27 +00:00
parent a91f242a50
commit 8b20aab3fb
4 changed files with 73 additions and 42 deletions
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4
applet.cpp
View File

@ -1311,8 +1311,8 @@ QRect Applet::screenRect() const
bottomRight.setX(bottomRight.x() + size().width());
bottomRight.setY(bottomRight.y() + size().height());
QPoint tL = view()->mapToGlobal(containment()->view()->mapFromScene(pos()));
QPoint bR = view()->mapToGlobal(containment()->view()->mapFromScene(bottomRight));
QPoint tL = containment()->view()->mapToGlobal(containment()->view()->mapFromScene(pos()));
QPoint bR = containment()->view()->mapToGlobal(containment()->view()->mapFromScene(bottomRight));
kDebug() << "screenRect = " << QPoint(tL.x(), tL.y()), QSize(bR.x() - tL.x(), bR.y() - tL.y());
return QRect(QPoint(tL.x(), tL.y()), QSize(bR.x() - tL.x(), bR.y() - tL.y()));

103
applethandle.cpp
View File

@ -98,10 +98,6 @@ AppletHandle::AppletHandle(Containment *parent, Applet *applet)
//will only update this after the handle is destroyed, and we
//will track changes to it in the mouseMoveEvent.
m_screenRect = m_applet->screenRect();
//add a small margin to the screenRect so, that when we check
//if we are over another view than the source view, we won't
//detect the top level view.
m_screenRect.adjust(-2, -2, 2, 2);
connect(m_hoverTimer, SIGNAL(timeout()), this, SLOT(fadeIn()));
connect(m_applet, SIGNAL(destroyed(QObject*)), this, SLOT(appletDestroyed()));
@ -109,6 +105,13 @@ AppletHandle::AppletHandle(Containment *parent, Applet *applet)
setAcceptsHoverEvents(true);
m_hoverTimer->start();
//We got to be able to see the applet while dragging to to another containment,
//so we want a high zValue.
//TODO: restore applets original zValue before destroying the handle.
//FIXME: apparently this doesn't work: sometimes an applet still get's drawn behind
//the containment it's being dragged to, sometimes it doesn't.
m_zValue = m_applet->zValue();
m_applet->raise();
setZValue(m_applet->zValue());
}
@ -292,12 +295,8 @@ void AppletHandle::mousePressEvent(QGraphicsSceneMouseEvent *event)
//set mousePos to the position in the applet, in screencoords, so it becomes easy
//to reposition the toplevel view to the correct position.
QPoint localpos = m_applet->containment()->view()
->mapFromScene(m_applet->pos() + m_pos);
m_mousePos = event->screenPos() - m_applet->containment()->view()
->mapToGlobal(localpos);
//set the starting position
m_pos = pos();
QPoint localpos = m_containment->view()->mapFromScene(m_applet->scenePos());
m_mousePos = event->screenPos() - m_containment->view()->mapToGlobal(localpos);
return;
}
@ -305,21 +304,24 @@ void AppletHandle::mousePressEvent(QGraphicsSceneMouseEvent *event)
QGraphicsItem::mousePressEvent(event);
}
bool AppletHandle::goTopLevel(const QPoint & pos) {
Plasma::View *v = Plasma::View::topLevelViewAt(pos);
if (v) {
Containment *c = v->containment();
if (c && c != m_containment) {
bool AppletHandle::leaveCurrentView(const QRect &rect) const
{
foreach (QWidget *widget, QApplication::topLevelWidgets()) {
if (widget->geometry().intersects(rect)) {
//is this widget a plasma view, a different view then our current one,
//AND not a dashboardview?
Plasma::View *v = qobject_cast<Plasma::View *>(widget);
if (v && v != m_applet->containment()->view()
&& v != m_topview
&& v->containment() != m_containment) {
return true;
} else {
}
}
}
return false;
}
} else {
return true;
}
}
void AppletHandle::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
//kDebug() << "button pressed:" << m_pressedButton << ", fade pending?" << m_pendingFade;
@ -384,9 +386,9 @@ void AppletHandle::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
}
//find out if we were dropped on a panel or something
if (goTopLevel(m_screenRect.center())) {
if (leaveCurrentView(m_screenRect)) {
Plasma::View *v = Plasma::View::topLevelViewAt(m_screenRect.center());
if (v) {
if (v && v != m_containment->view()) {
Containment *c = v->containment();
//We decide where we've been dropped by looking at the center of the
//applet.
@ -396,6 +398,30 @@ void AppletHandle::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
//FIXME how reliable is this transform?
switchContainment(c, v->mapToScene(pos));
}
} else {
// test for containment change
kDebug() << "testing for containment change, sceneBoundingRect = " << m_containment->sceneBoundingRect();
if (!m_containment->sceneBoundingRect().contains(m_applet->scenePos())) {
// see which containment it belongs to
Corona * corona = qobject_cast<Corona*>(scene());
if (corona) {
QList<Containment*> containments = corona->containments();
for (int i = 0; i < containments.size(); ++i) {
QPointF pos;
pos = containments[i]->view()->mapToScene(containments[i]->view()
->mapFromGlobal(m_screenRect.topLeft()));
if (containments[i]->sceneBoundingRect().contains(pos)) {
//kDebug() << "new containment = " << containments[i];
kDebug() << "rect = " << containments[i]->sceneBoundingRect();
// add the applet to the new containment and take it from the old one
kDebug() << "moving to other containment with position" << pos;;
switchContainment(containments[i], pos);
break;
}
}
}
}
}
break;
}
@ -445,17 +471,10 @@ void AppletHandle::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
m_screenRect = QRect(event->screenPos() - m_mousePos,
m_applet->screenRect().size());
//add a small margin, to avoid detecting the toplevel view when checking
//if we have to move to a toplevel window.
m_screenRect.adjust(-2, -2, 2, 2);
kDebug() << "m_screenRect = " << m_screenRect;
//Are we moving out of the current view?
bool toTopLevel = goTopLevel(m_screenRect.topLeft()) ||
goTopLevel(m_screenRect.topRight()) ||
goTopLevel(m_screenRect.bottomLeft()) ||
goTopLevel(m_screenRect.bottomRight());
bool toTopLevel = leaveCurrentView(m_screenRect);
if (!toTopLevel) {
setPos(m_pos);
@ -469,7 +488,7 @@ void AppletHandle::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
}
} else {
if (!m_topview) { //create a new toplevel view
m_topview = new View(m_applet->containment(), -1, 0);
m_topview = new View(m_containment, -1, 0);
m_topview->setTrackContainmentChanges(false);
m_topview->setWindowFlags(Qt::ToolTip | Qt::FramelessWindowHint
@ -502,7 +521,7 @@ void AppletHandle::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
m_topview->show();
m_applet->setGhostView(m_applet->containment()->view());
m_applet->setGhostView(m_containment->view());
//TODO: non compositing users are screwed: masking looks terrible.
//Consider always enabling the applet background. Stuff like the analog clock
@ -623,6 +642,7 @@ void AppletHandle::switchContainment(Containment *containment, const QPointF &po
case Containment::PanelContainment:
kDebug() << "panel";
//we need to fully disassociate the applet and handle, then kill the handle
applet->setZValue(m_zValue);
forceDisappear(); //takes care of event filter and killing handle
m_applet=0; //make sure we don't try to act on the applet again
applet->disconnect(this); //make sure the applet doesn't tell us to do anything
@ -631,11 +651,18 @@ void AppletHandle::switchContainment(Containment *containment, const QPointF &po
default: //FIXME assuming everything else behaves like desktop
kDebug() << "desktop";
m_containment = containment;
containment->addApplet(m_applet);
setParentItem(containment);
m_applet->setParentItem(this);
setPos(containment->mapFromScene(pos));
//setPos(pos);
//FIXME: destorying the applethandle might not be necesarry. I'm having issues
//getting it to work correctly while keeping the handle though, so for now just
//destroy it.
applet->setZValue(m_zValue);
forceDisappear();
m_applet=0;
applet->disconnect(this);
containment->addApplet(applet, containment->mapFromScene(pos));
//setParentItem(containment);
//m_applet->setParentItem(this);
//setPos(containment->mapFromScene(pos));
//update();
}
update();
}

3
applethandle_p.h
View File

@ -81,7 +81,7 @@ class AppletHandle : public QObject, public QGraphicsItem
* @param pos the (scene-relative) position to place it at
*/
void switchContainment(Containment *containment, const QPointF &pos);
bool goTopLevel(const QPoint & pos);
bool leaveCurrentView(const QRect &rect) const;
QRectF m_rect;
ButtonType m_pressedButton;
@ -103,6 +103,7 @@ class AppletHandle : public QObject, public QGraphicsItem
QPoint m_mousePos; //mousepos relative to applet
QRect m_screenRect; //boudingrect of applet in screencoords
QPointF m_pos; //current position of applet in sceneCoords
qreal m_zValue; //current zValue of the applet, so it can be restored after drag.
};
}

3
containment.cpp
View File

@ -494,6 +494,9 @@ void Containment::addApplet(Applet *applet, const QPointF &pos, bool delayInit)
applet->removeSceneEventFilter(currentContainment);
KConfigGroup oldConfig = applet->config();
currentContainment->d->applets.removeAll(applet);
if (currentContainment->d->handles.contains(applet)) {
currentContainment->d->handles.remove(applet);
}
applet->setParentItem(this);
// now move the old config to the new location