office/okular
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Change pages in presentation mode by swiping on touch screen

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REVIEW: 130012
BUGS: 354012
This commit is contained in:
Oliver Sander 2017-03-20 00:22:24 +01:00 committed by Albert Astals Cid
parent 63a08bc01a
commit 618072f8a2
2 changed files with 39 additions and 3 deletions
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40
ui/presentationwidget.cpp
View file

@ -29,6 +29,7 @@
#include <qvalidator.h>
#include <qapplication.h>
#include <qdesktopwidget.h>
#include <QGestureEvent>
#include <kcursor.h>
#include <krandom.h>
#include <qtoolbar.h>
@ -232,6 +233,9 @@ PresentationWidget::PresentationWidget( QWidget * parent, Okular::Document * doc
p.setColor( QPalette::Active, QPalette::Background, Qt::darkGray );
m_topBar->setPalette( p );
// Grab swipe gestures to change pages
grabGesture(Qt::SwipeGesture);
// misc stuff
setMouseTracking( true );
setContextMenuPolicy( Qt::PreventContextMenu );
@ -528,6 +532,9 @@ void PresentationWidget::setPlayPauseIcon()
// <widget events>
bool PresentationWidget::event( QEvent * e )
{
if ( e->type() == QEvent::Gesture )
return gestureEvent(static_cast<QGestureEvent*>(e));
if ( e->type() == QEvent::ToolTip )
{
QHelpEvent * he = (QHelpEvent*)e;
@ -549,6 +556,33 @@ bool PresentationWidget::event( QEvent * e )
return QWidget::event( e );
}
bool PresentationWidget::gestureEvent( QGestureEvent * event )
{
// Swiping left or right on a touch screen will go to the previous or next slide, respectively.
// The precise gesture is the standard Qt swipe: with three(!) fingers.
if (QGesture *swipe = event->gesture(Qt::SwipeGesture))
{
QSwipeGesture * swipeEvent = static_cast<QSwipeGesture *>(swipe);
if (swipeEvent->state() == Qt::GestureFinished)
{
if (swipeEvent->horizontalDirection() == QSwipeGesture::Left)
{
slotPrevPage();
event->accept();
return true;
}
if (swipeEvent->horizontalDirection() == QSwipeGesture::Right)
{
slotNextPage();
event->accept();
return true;
}
}
}
return false;
}
void PresentationWidget::keyPressEvent( QKeyEvent * e )
{
if ( !m_isSetup )
@ -664,9 +698,6 @@ void PresentationWidget::mousePressEvent( QMouseEvent * e )
overlayClick( e->pos() );
return;
}
// if no other actions, go to next page
slotNextPage();
}
// pressing right button
else if ( e->button() == Qt::RightButton )
@ -689,6 +720,9 @@ void PresentationWidget::mouseReleaseEvent( QMouseEvent * e )
m_document->processAction( link );
m_pressedLink = 0;
}
// if no other actions, go to next page
slotNextPage();
}
void PresentationWidget::mouseMoveEvent( QMouseEvent * e )

2
ui/presentationwidget.h
View file

@ -22,6 +22,7 @@
class QLineEdit;
class QToolBar;
class QTimer;
class QGestureEvent;
class KActionCollection;
class KSelectAction;
class SmoothPathEngine;
@ -71,6 +72,7 @@ class PresentationWidget : public QWidget, public Okular::DocumentObserver
void paintEvent( QPaintEvent * e ) override;
void resizeEvent( QResizeEvent * e ) override;
void leaveEvent( QEvent * e ) override;
bool gestureEvent (QGestureEvent * e );
private:
const void * getObjectRect( Okular::ObjectRect::ObjectType type, int x, int y, QRect * geometry = 0 ) const;