qhaikurasterwindow.cpp

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// Copyright (C) 2015 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Tobias Koenig <tobias.koenig@kdab.com>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qhaikurasterwindow.h"
 
#include "qhaikukeymapper.h"
 
#include <View.h>
#include <Window.h>
 
#include <qpa/qwindowsysteminterface.h>
 
QT_BEGIN_NAMESPACE
 
Q_DECLARE_METATYPE(QEvent::Type)
Q_DECLARE_METATYPE(Qt::MouseButtons)
Q_DECLARE_METATYPE(Qt::MouseEventSource)
Q_DECLARE_METATYPE(Qt::KeyboardModifiers)
Q_DECLARE_METATYPE(Qt::Orientation)
 
HaikuViewProxy::HaikuViewProxy(BWindow *window, QObject *parent)
    : QObject(parent)
    , BView(BRect(0, 0, window->Bounds().right, window->Bounds().bottom), 0, B_FOLLOW_ALL_SIDES, B_WILL_DRAW | B_FRAME_EVENTS)
{
}
 
void HaikuViewProxy::MessageReceived(BMessage *message)
{
    switch (message->what) {
    case B_MOUSE_WHEEL_CHANGED:
        {
             float deltaX = 0;
             if (message->FindFloat("be:wheel_delta_x", &deltaX) != B_OK)
                 deltaX = 0;
 
             float deltaY = 0;
             if (message->FindFloat("be:wheel_delta_y", &deltaY) != B_OK)
                 deltaY = 0;
 
             if (deltaX != 0 || deltaY != 0) {
                BPoint localPos;
                uint32 keyState = 0;
                GetMouse(&localPos, &keyState);
                const Qt::KeyboardModifiers keyboardModifiers = keyStateToModifiers(modifiers());
 
                const BPoint globalPos = ConvertToScreen(localPos);
                const QPoint globalPosition = QPoint(globalPos.x, globalPos.y);
                const QPoint localPosition = QPoint(localPos.x, localPos.y);
 
                if (deltaX != 0)
                    Q_EMIT wheelEvent(localPosition, globalPosition, (deltaX * -120), Qt::Horizontal, keyboardModifiers);
 
                if (deltaY != 0)
                    Q_EMIT wheelEvent(localPosition, globalPosition, (deltaY * -120), Qt::Vertical, keyboardModifiers);
             }
             break;
        }
    default:
        BView::MessageReceived(message);
        break;
    }
 
}
 
void HaikuViewProxy::Draw(BRect updateRect)
{
    BView::Draw(updateRect);
 
    Q_EMIT drawRequest(QRect(updateRect.left, updateRect.top, updateRect.Width(), updateRect.Height()));
}
 
void HaikuViewProxy::MouseDown(BPoint localPos)
{
    BPoint dummyPos;
    uint32 keyState = 0;
    GetMouse(&dummyPos, &keyState);
 
    const Qt::MouseButtons mouseButtons = keyStateToMouseButtons(keyState);
    const Qt::KeyboardModifiers keyboardModifiers = keyStateToModifiers(modifiers());
    const Qt::MouseEventSource source = Qt::MouseEventNotSynthesized;
 
    const BPoint globalPos = ConvertToScreen(localPos);
    const QPoint globalPosition = QPoint(globalPos.x, globalPos.y);
    const QPoint localPosition = QPoint(localPos.x, localPos.y);
 
    Q_EMIT mouseEvent(localPosition, globalPosition, mouseButtons, keyboardModifiers, source);
}
 
void HaikuViewProxy::MouseUp(BPoint localPos)
{
    BPoint dummyPos;
    uint32 keyState = 0;
    GetMouse(&dummyPos, &keyState);
 
    const Qt::MouseButtons mouseButtons = keyStateToMouseButtons(keyState);
    const Qt::KeyboardModifiers keyboardModifiers = keyStateToModifiers(modifiers());
    const Qt::MouseEventSource source = Qt::MouseEventNotSynthesized;
 
    const BPoint globalPos = ConvertToScreen(localPos);
    const QPoint globalPosition = QPoint(globalPos.x, globalPos.y);
    const QPoint localPosition = QPoint(localPos.x, localPos.y);
 
    Q_EMIT mouseEvent(localPosition, globalPosition, mouseButtons, keyboardModifiers, source);
}
 
void HaikuViewProxy::MouseMoved(BPoint pos, uint32 code, const BMessage *dragMessage)
{
    switch (code) {
    case B_INSIDE_VIEW:
        {
            BPoint dummyPos;
            uint32 keyState = 0;
            GetMouse(&dummyPos, &keyState);
 
            const Qt::MouseButtons mouseButtons = keyStateToMouseButtons(keyState);
            const Qt::KeyboardModifiers keyboardModifiers = keyStateToModifiers(modifiers());
            const Qt::MouseEventSource source = Qt::MouseEventNotSynthesized;
 
            const BPoint globalPos = ConvertToScreen(pos);
            const QPoint globalPosition = QPoint(globalPos.x, globalPos.y);
            const QPoint localPosition = QPoint(pos.x, pos.y);
 
            Q_EMIT mouseEvent(localPosition, globalPosition, mouseButtons, keyboardModifiers, source);
        }
        break;
    case B_ENTERED_VIEW:
        Q_EMIT enteredView();
        break;
    case B_EXITED_VIEW:
        Q_EMIT exitedView();
        break;
    }
 
    BView::MouseMoved(pos, code, dragMessage);
}
 
void HaikuViewProxy::KeyDown(const char*, int32)
{
    handleKeyEvent(QEvent::KeyPress, Window()->CurrentMessage());
}
 
void HaikuViewProxy::KeyUp(const char*, int32)
{
    handleKeyEvent(QEvent::KeyRelease, Window()->CurrentMessage());
}
 
Qt::MouseButtons HaikuViewProxy::keyStateToMouseButtons(uint32 keyState) const
{
    Qt::MouseButtons mouseButtons(Qt::NoButton);
    if (keyState & B_PRIMARY_MOUSE_BUTTON)
        mouseButtons |= Qt::LeftButton;
    if (keyState & B_SECONDARY_MOUSE_BUTTON)
        mouseButtons |= Qt::RightButton;
    if (keyState & B_TERTIARY_MOUSE_BUTTON)
        mouseButtons |= Qt::MiddleButton;
 
    return mouseButtons;
}
 
Qt::KeyboardModifiers HaikuViewProxy::keyStateToModifiers(uint32 keyState) const
{
    Qt::KeyboardModifiers modifiers(Qt::NoModifier);
 
    if (keyState & B_SHIFT_KEY)
        modifiers |= Qt::ShiftModifier;
    if (keyState & B_CONTROL_KEY)
        modifiers |= Qt::AltModifier;
    if (keyState & B_COMMAND_KEY)
        modifiers |= Qt::ControlModifier;
 
    return modifiers;
}
 
void HaikuViewProxy::handleKeyEvent(QEvent::Type type, BMessage *message)
{
    int32 key = 0;
    uint32 code = 0;
    const char *bytes = nullptr;
    QString text;
 
    if (message) {
        if (message->FindString("bytes", &bytes) == B_OK) {
            text = QString::fromLocal8Bit(bytes, strlen(bytes));
        }
 
        if (message->FindInt32("key", &key) == B_OK) {
            code = QHaikuKeyMapper::translateKeyCode(key, (modifiers() & B_NUM_LOCK));
        }
    }
 
    const Qt::KeyboardModifiers keyboardModifiers = keyStateToModifiers(modifiers());
 
    Q_EMIT keyEvent(type, code, keyboardModifiers, text);
}
 
 
QHaikuRasterWindow::QHaikuRasterWindow(QWindow *window)
    : QHaikuWindow(window)
{
    qRegisterMetaType<QEvent::Type>();
    qRegisterMetaType<Qt::MouseButtons>();
    qRegisterMetaType<Qt::MouseEventSource>();
    qRegisterMetaType<Qt::KeyboardModifiers>();
    qRegisterMetaType<Qt::Orientation>();
 
    HaikuViewProxy *haikuView = new HaikuViewProxy(m_window);
    connect(haikuView, SIGNAL(mouseEvent(QPoint,QPoint,Qt::MouseButtons,Qt::KeyboardModifiers,Qt::MouseEventSource)),
            this, SLOT(haikuMouseEvent(QPoint,QPoint,Qt::MouseButtons,Qt::KeyboardModifiers,Qt::MouseEventSource)));
    connect(haikuView, SIGNAL(wheelEvent(QPoint,QPoint,int,Qt::Orientation,Qt::KeyboardModifiers)),
            this, SLOT(haikuWheelEvent(QPoint,QPoint,int,Qt::Orientation,Qt::KeyboardModifiers)));
    connect(haikuView, SIGNAL(keyEvent(QEvent::Type,int,Qt::KeyboardModifiers,QString)),
            this, SLOT(haikuKeyEvent(QEvent::Type,int,Qt::KeyboardModifiers,QString)));
    connect(haikuView, SIGNAL(enteredView()), this, SLOT(haikuEnteredView()));
    connect(haikuView, SIGNAL(exitedView()), this, SLOT(haikuExitedView()));
    connect(haikuView, SIGNAL(drawRequest(QRect)), this, SLOT(haikuDrawRequest(QRect)));
 
    m_view = haikuView;
 
    m_window->LockLooper();
    m_window->AddChild(m_view);
    m_view->MakeFocus();
    m_window->UnlockLooper();
}
 
QHaikuRasterWindow::~QHaikuRasterWindow()
{
    m_window->LockLooper();
    m_view->RemoveSelf();
    m_window->UnlockLooper();
 
    delete m_view;
    m_view = nullptr;
}
 
BView* QHaikuRasterWindow::nativeViewHandle() const
{
    return m_view;
}
 
QT_END_NAMESPACE