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tdelibs/tdeparts/partmanager.cpp

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/* This file is part of the KDE project
Copyright (C) 1999 Simon Hausmann <hausmann@kde.org>
(C) 1999 David Faure <faure@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "partmanager.h"
#include <tdeparts/event.h>
#include <tdeparts/part.h>
#include <tdeglobal.h>
#include <kdebug.h>
#include <tqapplication.h>
//#define DEBUG_PARTMANAGER
using namespace KParts;
template class TQPtrList<Part>;
namespace KParts {
class PartManagerPrivate
{
public:
PartManagerPrivate()
{
m_activeWidget = 0;
m_activePart = 0;
m_selectedPart = 0;
m_selectedWidget = 0;
m_bAllowNestedParts = false;
m_bIgnoreScrollBars = false;
m_activationButtonMask = TQt::LeftButton | TQt::MidButton | TQt::RightButton;
m_reason = PartManager::NoReason;
}
~PartManagerPrivate()
{
}
void setReason( TQEvent* ev ) {
switch( ev->type() ) {
case TQEvent::MouseButtonPress:
case TQEvent::MouseButtonDblClick: {
TQMouseEvent* mev = static_cast<TQMouseEvent*>( ev );
m_reason = mev->button() == TQt::LeftButton
? PartManager::ReasonLeftClick
: ( mev->button() == TQt::MidButton
? PartManager::ReasonMidClick
: PartManager::ReasonRightClick );
break;
}
case TQEvent::FocusIn:
m_reason = static_cast<TQFocusEvent*>( ev )->reason();
break;
default:
kdWarning(1000) << "PartManagerPrivate::setReason got unexpected ev type " << ev->type() << endl;
break;
}
}
Part * m_activePart;
TQWidget *m_activeWidget;
TQPtrList<Part> m_parts;
PartManager::SelectionPolicy m_policy;
Part *m_selectedPart;
TQWidget *m_selectedWidget;
TQPtrList<TQWidget> m_managedTopLevelWidgets;
short int m_activationButtonMask;
bool m_bIgnoreScrollBars;
bool m_bAllowNestedParts;
int m_reason;
};
}
PartManager::PartManager( TQWidget * parent, const char * name )
: TQObject( parent, name )
{
d = new PartManagerPrivate;
tqApp->installEventFilter( this );
d->m_policy = Direct;
addManagedTopLevelWidget( parent );
}
PartManager::PartManager( TQWidget *topLevel, TQObject *parent, const char *name )
: TQObject( parent, name )
{
d = new PartManagerPrivate;
tqApp->installEventFilter( this );
d->m_policy = Direct;
addManagedTopLevelWidget( topLevel );
}
PartManager::~PartManager()
{
for ( TQPtrListIterator<TQWidget> it( d->m_managedTopLevelWidgets );
it.current(); ++it )
disconnect( it.current(), TQT_SIGNAL( destroyed() ),
this, TQT_SLOT( slotManagedTopLevelWidgetDestroyed() ) );
for ( TQPtrListIterator<Part> it( d->m_parts ); it.current(); ++it )
{
it.current()->setManager( 0 );
}
// core dumps ... setActivePart( 0L );
tqApp->removeEventFilter( this );
delete d;
}
void PartManager::setSelectionPolicy( SelectionPolicy policy )
{
d->m_policy = policy;
}
PartManager::SelectionPolicy PartManager::selectionPolicy() const
{
return d->m_policy;
}
void PartManager::setAllowNestedParts( bool allow )
{
d->m_bAllowNestedParts = allow;
}
bool PartManager::allowNestedParts() const
{
return d->m_bAllowNestedParts;
}
void PartManager::setIgnoreScrollBars( bool ignore )
{
d->m_bIgnoreScrollBars = ignore;
}
bool PartManager::ignoreScrollBars() const
{
return d->m_bIgnoreScrollBars;
}
void PartManager::setActivationButtonMask( short int buttonMask )
{
d->m_activationButtonMask = buttonMask;
}
short int PartManager::activationButtonMask() const
{
return d->m_activationButtonMask;
}
bool PartManager::eventFilter( TQObject *obj, TQEvent *ev )
{
if ( ev->type() != TQEvent::MouseButtonPress &&
ev->type() != TQEvent::MouseButtonDblClick &&
ev->type() != TQEvent::FocusIn )
return false;
if ( !obj->isWidgetType() )
return false;
TQWidget *w = static_cast<TQWidget*>( obj );
if ( ( w->testWFlags( WType_Dialog ) && w->isModal() ) ||
w->testWFlags( WType_Popup ) || w->testWFlags( WStyle_Tool ) )
return false;
TQMouseEvent* mev = 0L;
if ( ev->type() == TQEvent::MouseButtonPress || ev->type() == TQEvent::MouseButtonDblClick )
{
mev = static_cast<TQMouseEvent*>( ev );
#ifdef DEBUG_PARTMANAGER
kdDebug(1000) << "PartManager::eventFilter button: " << mev->button() << " " << "d->m_activationButtonMask=" << d->m_activationButtonMask << endl;
#endif
if ( ( mev->button() & d->m_activationButtonMask ) == 0 )
return false; // ignore this button
}
Part * part;
while ( w )
{
TQPoint pos;
if ( !d->m_managedTopLevelWidgets.containsRef( w->topLevelWidget() ) )
return false;
if ( d->m_bIgnoreScrollBars && w->inherits( "TQScrollBar" ) )
return false;
if ( mev ) // mouse press or mouse double-click event
{
pos = mev->globalPos();
part = findPartFromWidget( w, pos );
} else
part = findPartFromWidget( w );
#ifdef DEBUG_PARTMANAGER
TQCString evType = ( ev->type() == TQEvent::MouseButtonPress ) ? "MouseButtonPress"
: ( ev->type() == TQEvent::MouseButtonDblClick ) ? "MouseButtonDblClick"
: ( ev->type() == TQEvent::FocusIn ) ? "FocusIn" : "OTHER! ERROR!";
#endif
if ( part ) // We found a part whose widget is w
{
if ( d->m_policy == PartManager::TriState )
{
if ( ev->type() == TQEvent::MouseButtonDblClick )
{
if ( part == d->m_activePart && w == d->m_activeWidget )
return false;
#ifdef DEBUG_PARTMANAGER
kdDebug(1000) << "PartManager::eventFilter dblclick -> setActivePart" << part << endl;
#endif
d->setReason( ev );
setActivePart( part, w );
d->m_reason = NoReason;
return true;
}
if ( ( d->m_selectedWidget != w || d->m_selectedPart != part ) &&
( d->m_activeWidget != w || d->m_activePart != part ) )
{
if ( part->isSelectable() )
setSelectedPart( part, w );
else {
#ifdef DEBUG_PARTMANAGER
kdDebug(1000) << "Part " << part << " (non-selectable) made active because " << w->className() << " got event" << " " << evType << endl;
#endif
d->setReason( ev );
setActivePart( part, w );
d->m_reason = NoReason;
}
return true;
}
else if ( d->m_selectedWidget == w && d->m_selectedPart == part )
{
#ifdef DEBUG_PARTMANAGER
kdDebug(1000) << "Part " << part << " made active (from selected) because " << w->className() << " got event" << " " << evType << endl;
#endif
d->setReason( ev );
setActivePart( part, w );
d->m_reason = NoReason;
return true;
}
else if ( d->m_activeWidget == w && d->m_activePart == part )
{
setSelectedPart( 0L );
return false;
}
return false;
}
else if ( part != d->m_activePart )
{
#ifdef DEBUG_PARTMANAGER
kdDebug(1000) << "Part " << part << " made active because " << w->className() << " got event" << " " << evType << endl;
#endif
d->setReason( ev );
setActivePart( part, w );
d->m_reason = NoReason;
}
return false;
}
w = w->parentWidget();
if ( w && ( ( w->testWFlags( WType_Dialog ) && w->isModal() ) ||
w->testWFlags( WType_Popup ) || w->testWFlags( WStyle_Tool ) ) )
{
#ifdef DEBUG_PARTMANAGER
kdDebug(1000) << TQString("No part made active although %1/%2 got event - loop aborted").arg(obj->name()).arg(obj->className()) << endl;
#endif
return false;
}
}
#ifdef DEBUG_PARTMANAGER
kdDebug(1000) << TQString("No part made active although %1/%2 got event").arg(obj->name()).arg(obj->className()) << endl;
#endif
return false;
}
Part * PartManager::findPartFromWidget( TQWidget * widget, const TQPoint &pos )
{
TQPtrListIterator<Part> it ( d->m_parts );
for ( ; it.current() ; ++it )
{
Part *part = it.current()->hitTest( widget, pos );
if ( part && d->m_parts.findRef( part ) != -1 )
return part;
}
return 0L;
}
Part * PartManager::findPartFromWidget( TQWidget * widget )
{
TQPtrListIterator<Part> it ( d->m_parts );
for ( ; it.current() ; ++it )
{
if ( widget == it.current()->widget() )
return it.current();
}
return 0L;
}
void PartManager::addPart( Part *part, bool setActive )
{
if ( d->m_parts.findRef( part ) != -1 ) // don't add parts more than once :)
{
#ifdef DEBUG_PARTMANAGER
kdWarning(1000) << k_funcinfo << part << " already added" << kdBacktrace(5) << endl;
#endif
return;
}
d->m_parts.append( part );
part->setManager( this );
if ( setActive )
{
setActivePart( part );
if ( part->widget() )
part->widget()->setFocus();
}
// Prevent focus problems
if ( part->widget() && part->widget()->focusPolicy() == TQWidget::NoFocus )
{
kdWarning(1000) << "Part '" << part->name() << "' has a widget " << part->widget()->name() << " with a focus policy of NoFocus. It should have at least a ClickFocus policy, for part activation to work well." << endl;
}
if ( part->widget() && part->widget()->focusPolicy() == TQWidget::TabFocus )
{
kdWarning(1000) << "Part '" << part->name() << "' has a widget " << part->widget()->name() << " with a focus policy of TabFocus. It should have at least a ClickFocus policy, for part activation to work well." << endl;
}
if ( setActive && part->widget() )
part->widget()->show();
emit partAdded( part );
}
void PartManager::removePart( Part *part )
{
if ( d->m_parts.findRef( part ) == -1 )
{
kdFatal(1000) << TQString(TQString("Can't remove part %1, not in KPartManager's list.").arg(part->name())) << endl;
return;
}
//Warning. The part could be already deleted
//kdDebug(1000) << TQString("Part %1 removed").arg(part->name()) << endl;
int nb = d->m_parts.count();
bool ok = d->m_parts.removeRef( part );
Q_ASSERT( ok );
Q_ASSERT( (int)d->m_parts.count() == nb-1 );
part->setManager(0);
emit partRemoved( part );
if ( part == d->m_activePart )
setActivePart( 0 );
if ( part == d->m_selectedPart )
setSelectedPart( 0 );
}
void PartManager::replacePart( Part * oldPart, Part * newPart, bool setActive )
{
//kdDebug(1000) << "replacePart " << oldPart->name() << "-> " << newPart->name() << " setActive=" << setActive << endl;
// This methods does exactly removePart + addPart but without calling setActivePart(0) in between
if ( d->m_parts.findRef( oldPart ) == -1 )
{
kdFatal(1000) << TQString(TQString("Can't remove part %1, not in KPartManager's list.").arg(oldPart->name())) << endl;
return;
}
d->m_parts.removeRef( oldPart );
oldPart->setManager(0);
emit partRemoved( oldPart );
addPart( newPart, setActive );
}
void PartManager::setActivePart( Part *part, TQWidget *widget )
{
if ( part && d->m_parts.findRef( part ) == -1 )
{
kdWarning( 1000 ) << "PartManager::setActivePart : trying to activate a non-registered part! " << part->name() << endl;
return; // don't allow someone call setActivePart with a part we don't know about
}
//check whether nested parts are disallowed and activate the top parent part then, by traversing the
//tree recursively (Simon)
if ( part && !d->m_bAllowNestedParts )
{
TQObject *parentPart = part->parent(); // ### this relies on people using KParts::Factory!
if ( parentPart && parentPart->inherits( "KParts::Part" ) )
{
KParts::Part *parPart = static_cast<KParts::Part *>( parentPart );
setActivePart( parPart, parPart->widget() );
return;
}
}
#ifdef DEBUG_PARTMANAGER
kdDebug(1000) << "PartManager::setActivePart d->m_activePart=" << d->m_activePart << "<->part=" << part
<< " d->m_activeWidget=" << d->m_activeWidget << "<->widget=" << widget << endl;
#endif
// don't activate twice
if ( d->m_activePart && part && d->m_activePart == part &&
(!widget || d->m_activeWidget == widget) )
return;
KParts::Part *oldActivePart = d->m_activePart;
TQWidget *oldActiveWidget = d->m_activeWidget;
setSelectedPart( 0L );
d->m_activePart = part;
d->m_activeWidget = widget;
if ( oldActivePart )
{
KParts::Part *savedActivePart = part;
TQWidget *savedActiveWidget = widget;
PartActivateEvent ev( false, oldActivePart, oldActiveWidget );
TQApplication::sendEvent( oldActivePart, &ev );
if ( oldActiveWidget )
{
disconnect( oldActiveWidget, TQT_SIGNAL( destroyed() ),
this, TQT_SLOT( slotWidgetDestroyed() ) );
TQApplication::sendEvent( oldActiveWidget, &ev );
}
d->m_activePart = savedActivePart;
d->m_activeWidget = savedActiveWidget;
}
if ( d->m_activePart )
{
if ( !widget )
d->m_activeWidget = part->widget();
PartActivateEvent ev( true, d->m_activePart, d->m_activeWidget );
TQApplication::sendEvent( d->m_activePart, &ev );
if ( d->m_activeWidget )
{
connect( d->m_activeWidget, TQT_SIGNAL( destroyed() ),
this, TQT_SLOT( slotWidgetDestroyed() ) );
TQApplication::sendEvent( d->m_activeWidget, &ev );
}
}
// Set the new active instance in TDEGlobal
setActiveInstance( d->m_activePart ? d->m_activePart->instance() : 0L );
kdDebug(1000) << this << " emitting activePartChanged " << d->m_activePart << endl;
emit activePartChanged( d->m_activePart );
}
void PartManager::setActiveInstance( TDEInstance * instance )
{
// It's a separate method to allow redefining this behavior
TDEGlobal::_activeInstance = instance;
}
Part *PartManager::activePart() const
{
return d->m_activePart;
}
TQWidget *PartManager::activeWidget() const
{
return d->m_activeWidget;
}
void PartManager::setSelectedPart( Part *part, TQWidget *widget )
{
if ( part == d->m_selectedPart && widget == d->m_selectedWidget )
return;
Part *oldPart = d->m_selectedPart;
TQWidget *oldWidget = d->m_selectedWidget;
d->m_selectedPart = part;
d->m_selectedWidget = widget;
if ( part && !widget )
d->m_selectedWidget = part->widget();
if ( oldPart )
{
PartSelectEvent ev( false, oldPart, oldWidget );
TQApplication::sendEvent( oldPart, &ev );
TQApplication::sendEvent( oldWidget, &ev );
}
if ( d->m_selectedPart )
{
PartSelectEvent ev( true, d->m_selectedPart, d->m_selectedWidget );
TQApplication::sendEvent( d->m_selectedPart, &ev );
TQApplication::sendEvent( d->m_selectedWidget, &ev );
}
}
Part *PartManager::selectedPart() const
{
return d->m_selectedPart;
}
TQWidget *PartManager::selectedWidget() const
{
return d->m_selectedWidget;
}
void PartManager::slotObjectDestroyed()
{
kdDebug(1000) << "KPartManager::slotObjectDestroyed()" << endl;
removePart( const_cast<Part *>( static_cast<const Part *>( sender() ) ) );
}
void PartManager::slotWidgetDestroyed()
{
kdDebug(1000) << "KPartsManager::slotWidgetDestroyed()" << endl;
if ( static_cast<const TQWidget *>( sender() ) == d->m_activeWidget )
setActivePart( 0L ); //do not remove the part because if the part's widget dies, then the
//part will delete itself anyway, invoking removePart() in its destructor
}
const TQPtrList<Part> *PartManager::parts() const
{
return &d->m_parts;
}
void PartManager::addManagedTopLevelWidget( const TQWidget *topLevel )
{
if ( !topLevel->isTopLevel() )
return;
if ( d->m_managedTopLevelWidgets.containsRef( topLevel ) )
return;
d->m_managedTopLevelWidgets.append( topLevel );
connect( topLevel, TQT_SIGNAL( destroyed() ),
this, TQT_SLOT( slotManagedTopLevelWidgetDestroyed() ) );
}
void PartManager::removeManagedTopLevelWidget( const TQWidget *topLevel )
{
if ( !topLevel->isTopLevel() )
return;
if ( d->m_managedTopLevelWidgets.findRef( topLevel ) == -1 )
return;
d->m_managedTopLevelWidgets.remove();
}
void PartManager::slotManagedTopLevelWidgetDestroyed()
{
const TQWidget *widget = static_cast<const TQWidget *>( sender() );
removeManagedTopLevelWidget( widget );
}
int PartManager::reason() const
{
return d->m_reason;
}
void PartManager::virtual_hook( int, void* )
{ /*BASE::virtual_hook( id, data );*/ }
#include "partmanager.moc"