Diffstat (limited to 'libopie/big-screen/owidgetstack.cpp') (more/less context) (show whitespace changes)
| -rw-r--r-- | libopie/big-screen/owidgetstack.cpp | 404 |
1 files changed, 404 insertions, 0 deletions
diff --git a/libopie/big-screen/owidgetstack.cpp b/libopie/big-screen/owidgetstack.cpp new file mode 100644 index 0000000..967c54b --- a/dev/null +++ b/libopie/big-screen/owidgetstack.cpp @@ -0,0 +1,404 @@ +#include <qapplication.h> +#include <qwidgetstack.h> + +#include "owidgetstack.h" + +namespace { + const int mode_size = 330; +} + +/** + * This is the standard widget. For simple usage see the example. Normally this widget + * is the central widget of a QMainWindow. + * Use removeWidget before you delete a widget yourself. OWidgetStack does not + * yet recognize removal of children. + * + * @param parent The parent widget. It maybe 0 but then you need to take care of deletion. + * Or you use QPEApplication::showMainWidget(). + * @param name Name will be passed on to QObject + * @param fl Additional window flags passed to QFrame. see @Qt::WFlags + */ +OWidgetStack::OWidgetStack( QWidget* parent, const char* name, WFlags fl) + : QFrame( parent, name, fl ) +{ + m_last = m_mWidget = 0; + m_forced = false; + + QApplication::desktop()->installEventFilter( this ); + setFontPropagation ( AllChildren ); + setPalettePropagation( AllChildren ); + + /* sets m_mode and initializes more */ + /* if you change this call change switchTop as well */ + m_stack = 0; + switchStack(); +} + +/** + * The destructor. It deletes also all added widgets. + * + */ +OWidgetStack::~OWidgetStack() { + if (m_mode == BigScreen && !m_list.isEmpty() ) { + QMap<int, QWidget*>::Iterator it = m_list.begin(); + for ( ; it != m_list.end(); ++it ) + delete it.data(); + } + m_list.clear(); + +} + +/** + * return the mode of the desktop. There are currently two modes. SmallScreen + * with a normal PDA resolution and BigScreen with resolutions greater than + * 330 for width and height. + * You can also force the mode this widget is in with forceMode() + * Note that NoForce will be never returned from here + */ +enum OWidgetStack::Mode OWidgetStack::mode()const { + return m_mode; +} + +/** + * You can also force one of the modes and then + * this widget stops on listening to size changes. You + * can revert to the scanning behaviour by setting mode + * to NoForce + */ +void OWidgetStack::forceMode( enum Mode mode) { + m_forced = mode != NoForce; + + /* we need to see which mode we're in */ + if (!m_forced ) { + if ( QApplication::desktop()->width() >= + mode_size ) + mode = BigScreen; + else + mode = SmallScreen; + } + switch( mode ) { + case NoForce: + case SmallScreen: + switchStack(); + break; + case BigScreen: + switchTop(); + break; + + } + + m_mode = mode; +} + +/** + * Adds a widget to the stack. The first widget added is considered + * to be the mainwindow. This is important because if Opie is in + * BigScreen mode the sizeHint of the MainWindow will be returned. + * In Small Screen the sizeHint of the QWidgetStack is returned. + * See QWidgetStack::sizeHint. + * This widget takes ownership of the widget and may even reparent. + * All windows will be hidden + * + * @param wid The QWidget to be added + * @param id An ID for the Widget. If the ID is duplicated the + last set widget will be related to the id + * + */ +void OWidgetStack::addWidget( QWidget* wid, int id) { + if (!wid) + return; + + /* set our main widget */ + if (!m_mWidget) + m_mWidget = wid; + + m_list.insert( id, wid ); + + /** + * adding does not raise any widget + * But for our mainwidget we prepare + * the right position with the right parent + */ + if (m_mode == SmallScreen ) + m_stack->addWidget( wid,id ); + else if ( m_mWidget == wid ) { + wid->reparent(this, 0, contentsRect().topLeft() ); + wid->hide(); + }else { + wid->reparent(0, WType_TopLevel, QPoint(10, 10) ); + wid->hide(); + } +} + + +/** + * Remove the widget from the stack it'll be reparented to 0 + * and ownership is dropped. You need to delete it. + * If the removed widget was the mainwindow consider + * to call setMainWindow. + * + * @param wid The QWidget to be removed + */ +void OWidgetStack::removeWidget( QWidget* wid) { + if (!wid) + return; + + if (m_mode == SmallScreen ) + m_stack->removeWidget( wid ); + + + wid->reparent(0, 0, QPoint(0, 0) ); + m_list.remove( id(wid) ); + + if ( wid == m_mWidget ) + m_mWidget = 0; +} + +#if 0 +/** + * @internal_resons + */ +QSizeHint OWidgetStack::sizeHint()const { + +} + +/** + * @internal_reasons + */ +QSizeHint OWidgetStack::minimumSizeHint()const { + +} +#endif + +/** + * This function tries to find the widget with the id. + * You supplied a possible id in addWIdget. Note that not + * QWidget::winId() is used. + * + * @param id The id to search for + * + * @return The widget or null + * @see addWidget + */ +QWidget* OWidgetStack::widget( int id) const { + return m_list[id]; +} + +/** + * Tries to find the assigned id for the widget + * or returns -1 if no widget could be found + * @param wid The widget to look for + */ +int OWidgetStack::id( QWidget* wid)const{ + if (m_list.isEmpty() ) + return -1; + + QMap<int, QWidget*>::ConstIterator it = m_list.begin(); + for ( ; it != m_list.end(); ++it ) + if ( it.data() == wid ) + break; + + /* if not at the end return the key */ + return it == m_list.end() ? -1 : it.key(); +} + + +/** + * This function returns the currently visible + * widget. In BigScreen mode the mainwindow + * is returned + */ +QWidget* OWidgetStack::visibleWidget()const { + if (m_mode == SmallScreen ) + return m_stack->visibleWidget(); + else + return m_mWidget; + +} + +/** + * This method raises the widget wit the specefic id. + * Note that in BigScreen mode the widget is made visible + * but the other ( previous) visible widget(s) will not + * be made invisible. If you need this use hideWidget(). + * + * @param id Raise the widget with id + */ +void OWidgetStack::raiseWidget( int id) { + return raiseWidget( widget( id ) ); +} + +/** + * This is an overloaded function and only differs in its parameters. + * @see raiseWidget( int ) + */ +void OWidgetStack::raiseWidget( QWidget* wid) { + m_last = wid; + if (m_mode == SmallScreen ) + m_stack->raiseWidget( wid ); + else { + int ide; + emit aboutToShow( wid ); + /* if someone is connected and the widget is actually available */ + if ( receivers( SIGNAL(aboutToShow(int) ) ) && + ( (ide = id( wid ) ) != -1 ) ) + emit aboutToShow( ide ); + + /* ### FIXME PLACE THE WIDGET right */ + wid->show(); + } +} + +/** + * This will hide the currently visible widget + * and raise the widget specified by the parameter. + * Note that this method does not use visibleWIdget but remembers + * the last raisedWidget + */ +void OWidgetStack::hideWidget( int id) { + /* hiding our main widget wouldn't be smart */ + if ( m_mode == BigScreen && m_last != m_mWidget ) + m_last->hide(); + raiseWidget( id ); +} + +/** + * This is overloaded and only differs in the parameters + * it takes. + */ +void OWidgetStack::hideWidget( QWidget* wid) { + /* still not smart */ + if ( m_mode == BigScreen && m_last != m_mWidget ) + m_last->hide(); + + raiseWidget( wid ); +} + + +bool OWidgetStack::eventFilter( QObject* obj, QEvent* e) { + qWarning(" %s %s", obj->name(), obj->className() ); + if ( e->type() == QEvent::Resize ) { + QResizeEvent *res = static_cast<QResizeEvent*>( e ); + QSize size = res->size(); + if ( size.width() >= mode_size ) + switchTop(); + else + switchStack(); + } + return false; +} + + +/** + * @internal_resons + */ +void OWidgetStack::resizeEvent( QResizeEvent* ev ) { + QFrame::resizeEvent( ev ); + if (m_mode == SmallScreen ) + m_stack->setGeometry( frameRect() ); + else + if (m_mWidget ) + m_mWidget->setGeometry( frameRect() ); + +} + +/** + * setMainWindow gives the OWidgetStack a hint which + * window should always stay inside the stack. + * Normally the first added widget is considered to be + * the mainwindow but you can change this with this + * function. + * If in BigScreen mode the current mainwindow will be reparented + * and hidden. The position will be taken by the new one. + * If the old MainWindow was hidden the new window will + * also be hidden. If the window was visible the new mainwindow + * will be made visible too and the old one hidden. If there + * was no mainwindow it will be hidden as well. + * + * @param wid The new mainwindow + */ +void OWidgetStack::setMainWindow( QWidget* wid ) { + if (m_mode == BigScreen ) { + bool wasVisible = false; + if (m_mWidget ) { + wasVisible = !m_mWidget->isHidden(); + /* hidden by default */ + m_mWidget->reparent(0, WType_TopLevel, QPoint(10, 10) ); + } + wid->reparent(this, 0, frameRect().topLeft() ); + + if (wasVisible) + wid->show(); + } + + m_mWidget = wid; +} + +/** + * this is an overloaded member and only differs + * in the type of arguments. + * @see setMainWindow(QWidget*) + */ +void OWidgetStack::setMainWindow( int id) { + setMainWindow( widget( id ) ); +} + + +/* + * this function switches to a stack ;) + */ +void OWidgetStack::switchStack() { + if (m_stack ) { + m_stack->setGeometry( frameRect() ); + return; + } + + m_mode = SmallScreen; + m_stack = new QWidgetStack(this); + + connect(m_stack, SIGNAL(aboutToShow(QWidget*) ), + this, SIGNAL(aboutToShow(QWidget*) ) ); + connect(m_stack, SIGNAL(aboutToShow(int) ), + this, SIGNAL(aboutToShow(int) ) ); + + /* now reparent the widgets... luckily QWidgetSatck does most of the work */ + if (m_list.isEmpty() ) + return; + + QMap<int, QWidget*>::Iterator it = m_list.begin(); + for ( ; it != m_list.end(); ++it ) + m_stack->addWidget( it.data(), it.key() ); + + +} + +/* + * we will switch to top level mode + * reparent the list of widgets and then delete the stack + */ +void OWidgetStack::switchTop() { + m_mode = BigScreen; + /* this works because it is guaranteed that switchStack was called at least once*/ + if (!m_stack && m_mWidget) { + m_mWidget->setGeometry( frameRect() ); + return; + }else if (!m_stack) + return; + + if (!m_list.isEmpty() ) { + QMap<int, QWidget*>::Iterator it = m_list.begin(); + for ( ; it != m_list.end(); ++it ) { + /* better than reparenting twice */ + if ( it.data() == m_mWidget ) { + m_mWidget->reparent(this, 0, frameRect().topLeft() ); + m_mWidget->setGeometry( frameRect() ); + m_mWidget->show(); + }else + /* ### FIXME we need to place the widget better */ + it.data()->reparent(0, WType_TopLevel, QPoint(10, 10) ); + } + } + + delete m_stack; + m_stack = 0; +} |