KisScratchPadEventFilter Class Reference

#include <kis_scratch_pad_event_filter.h>

Inheritance diagram for KisScratchPadEventFilter:

Public Member Functions
	KisScratchPadEventFilter (QWidget *parent)
void	setWidgetToDocumentTransform (const QTransform &transform)

Protected Member Functions
bool	eventFilter (QObject *obj, QEvent *event) override

Private Member Functions
KoPointerEvent *	createMouseEvent (QEvent *event)
KoPointerEvent *	createTabletEvent (QEvent *event)
QWidget *	parentWidget ()
bool	shouldResetWheelDelta (QEvent *event)

Private Attributes
Qt::MouseButton	m_pressedButton
KisScratchPad *	m_scratchPad
bool	m_tabletPressed
QTransform	m_widgetToDocument

Detailed Description

Definition at line 18 of file kis_scratch_pad_event_filter.h.

Constructor & Destructor Documentation

KisScratchPadEventFilter()

KisScratchPadEventFilter::KisScratchPadEventFilter

(

QWidget *

parent

)

Definition at line 16 of file kis_scratch_pad_event_filter.cpp.

    : QObject(parent),
      m_tabletPressed(false),
      m_pressedButton(Qt::NoButton)
{
    parent->installEventFilter(this);
    m_scratchPad = qobject_cast<KisScratchPad *>(parent);
}

References m_scratchPad.

Member Function Documentation

createMouseEvent()

KoPointerEvent * KisScratchPadEventFilter::createMouseEvent ( QEvent * event )

inlineprivate

Definition at line 35 of file kis_scratch_pad_event_filter.cpp.

{
    QMouseEvent *mouseEvent = static_cast<QMouseEvent*>(event);
    return new KoPointerEvent(mouseEvent, m_widgetToDocument.map(mouseEvent->pos()));
}

References m_widgetToDocument.

createTabletEvent()

KoPointerEvent * KisScratchPadEventFilter::createTabletEvent ( QEvent * event )

inlineprivate

Definition at line 41 of file kis_scratch_pad_event_filter.cpp.

{
    QTabletEvent *tabletEvent = static_cast<QTabletEvent*>(event);
    const QPointF pos = tabletEvent->posF();
    return new KoPointerEvent(tabletEvent, m_widgetToDocument.map(pos));
}

References m_widgetToDocument.

eventFilter()

bool KisScratchPadEventFilter::eventFilter ( QObject * obj, QEvent * event )

overrideprotected

Definition at line 49 of file kis_scratch_pad_event_filter.cpp.

{
    Q_UNUSED(obj);
    bool result = false;
 
    QScopedPointer<KoPointerEvent> ev;
 
    if (shouldResetWheelDelta(event)) {
        m_scratchPad->resetWheelDelta();
    }
 
    switch(event->type()) {
    case QEvent::MouseButtonPress:
        if (m_pressedButton != Qt::NoButton) break;
 
        ev.reset(createMouseEvent(event));
        m_pressedButton = ev->button();
        m_scratchPad->pointerPress(ev.data());
        result = true;
        break;
    case QEvent::MouseButtonRelease:
        ev.reset(createMouseEvent(event));
        if (ev->button() != m_pressedButton) break;
 
        m_pressedButton = Qt::NoButton;
        m_scratchPad->pointerRelease(ev.data());
        result = true;
        break;
    case QEvent::MouseMove:
        if(m_tabletPressed) break;
        ev.reset(createMouseEvent(event));
        m_scratchPad->pointerMove(ev.data());
        result = true;
        break;
    case QEvent::TabletPress:
        if (m_pressedButton != Qt::NoButton) break;
 
        m_tabletPressed = true;
        ev.reset(createTabletEvent(event));
        m_pressedButton = ev->button();
        m_scratchPad->pointerPress(ev.data());
        result = true;
        break;
    case QEvent::TabletRelease:
        ev.reset(createTabletEvent(event));
        if (ev->button() != m_pressedButton) break;
 
        m_pressedButton = Qt::NoButton;
        m_scratchPad->pointerRelease(ev.data());
        m_tabletPressed = false;
        result = true;
        break;
    case QEvent::TabletMove:
        ev.reset(createTabletEvent(event));
        m_scratchPad->pointerMove(ev.data());
        result = true;
        break;
    case QEvent::FocusIn:
    case QEvent::FocusOut:
    case QEvent::Show:
    case QEvent::Hide:
        m_scratchPad->resetState();
        m_tabletPressed = false;
        m_pressedButton = Qt::NoButton;
        break;
    case QEvent::Wheel:
        if (m_pressedButton != Qt::NoButton) break;
 
        m_pressedButton = Qt::NoButton;
        m_scratchPad->wheelDelta(static_cast<QWheelEvent*>(event));
        result = true;
        break;
    default:
        result = false;
    }
 
    if (ev) {
        result = ev->isAccepted();
        event->setAccepted(result);
    }
 
    return result;
}

References createMouseEvent(), createTabletEvent(), m_pressedButton, m_scratchPad, m_tabletPressed, KisScratchPad::pointerMove(), KisScratchPad::pointerPress(), KisScratchPad::pointerRelease(), KisScratchPad::resetState(), KisScratchPad::resetWheelDelta(), shouldResetWheelDelta(), and KisScratchPad::wheelDelta().

parentWidget()

QWidget * KisScratchPadEventFilter::parentWidget ( )

inlineprivate

Definition at line 30 of file kis_scratch_pad_event_filter.cpp.

{
    return static_cast<QWidget*>(parent());
}

setWidgetToDocumentTransform()

void KisScratchPadEventFilter::setWidgetToDocumentTransform

(

const QTransform &

transform

)

Definition at line 25 of file kis_scratch_pad_event_filter.cpp.

{
    m_widgetToDocument = transform;
}

References m_widgetToDocument.

shouldResetWheelDelta()

bool KisScratchPadEventFilter::shouldResetWheelDelta ( QEvent * event )

private

Definition at line 133 of file kis_scratch_pad_event_filter.cpp.

{
    return
        event->type() == QEvent::FocusIn ||
        event->type() == QEvent::FocusOut ||
        event->type() == QEvent::MouseButtonPress ||
        event->type() == QEvent::MouseButtonRelease ||
        event->type() == QEvent::MouseButtonDblClick ||
        event->type() == QEvent::TabletPress ||
        event->type() == QEvent::TabletRelease ||
        event->type() == QEvent::Enter ||
        event->type() == QEvent::Leave ||
        event->type() == QEvent::TouchBegin ||
        event->type() == QEvent::TouchEnd ||
        event->type() == QEvent::TouchCancel ||
        event->type() == QEvent::NativeGesture;
}

Member Data Documentation

m_pressedButton

Qt::MouseButton KisScratchPadEventFilter::m_pressedButton

private

Definition at line 40 of file kis_scratch_pad_event_filter.h.

m_scratchPad

KisScratchPad* KisScratchPadEventFilter::m_scratchPad

private

Definition at line 41 of file kis_scratch_pad_event_filter.h.

m_tabletPressed

bool KisScratchPadEventFilter::m_tabletPressed

private

Definition at line 38 of file kis_scratch_pad_event_filter.h.

m_widgetToDocument

QTransform KisScratchPadEventFilter::m_widgetToDocument

private

Definition at line 37 of file kis_scratch_pad_event_filter.h.

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The documentation for this class was generated from the following files:

• libs/ui/widgets/kis_scratch_pad_event_filter.h
• libs/ui/widgets/kis_scratch_pad_event_filter.cpp