Can usb mouse wheel work in Qt/E ?

**earth** · 24th August 2011, 02:49

I configure the mouse like this:
export QWS_MOUSE_PROTO="LinuxInput:/dev/input/event1"

when I move the usb mouse, the mouse work fine.
when I scroll the mouse wheel in Qt/E application,I got the message:
"unknown mouse event type=2, code=8, value=1"

I look at the Qt source (version 4.7.3) code:
qt-everywhere-opensource-src-4.7.3\src\gui\embedded\qmouselinuxinput_qws.cpp

Qt Code:

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for (int i = 0; i < n; ++i) {
        struct ::input_event *data = &buffer;
 
 
        bool unknown = false;
        if (data->type == EV_ABS) {
            if (data->code == ABS_X) {
                m_x = data->value;
            } else if (data->code == ABS_Y) {
                m_y = data->value;
            } else {
                unknown = true;
            }
        } else if (data->type == EV_REL) {
            if (data->code == REL_X) {
                m_x += data->value;
            } else if (data->code == REL_Y) {
                m_y += data->value;
            } else {
                unknown = true;
            }
        } else if (data->type == EV_KEY && data->code == BTN_TOUCH) {
            m_buttons = data->value ? Qt::LeftButton : 0;
        } else if (data->type == EV_KEY) {
            int button = 0;
            switch (data->code) {
            case BTN_LEFT: button = Qt::LeftButton; break;
            case BTN_MIDDLE: button = Qt::MidButton; break;
            case BTN_RIGHT: button = Qt::RightButton; break;
            }
            if (data->value)
                m_buttons |= button;
            else
                m_buttons &= ~button;
        } else if (data->type == EV_SYN && data->code == SYN_REPORT) {
            QPoint pos(m_x, m_y);
            pos = m_handler->transform(pos);
            m_handler->limitToScreen(pos);
            m_handler->mouseChanged(pos, m_buttons);
        } else if (data->type == EV_MSC && data->code == MSC_SCAN) {
            // kernel encountered an unmapped key - just ignore it
            continue;
        } else {
            unknown = true;
        }
        if (unknown) {
            qWarning("unknown mouse event type=%x, code=%x, value=%x", data->type, data->code, data->value);
        }
    }

for (int i = 0; i < n; ++i) {
        struct ::input_event *data = &buffer;


        bool unknown = false;
        if (data->type == EV_ABS) {
            if (data->code == ABS_X) {
                m_x = data->value;
            } else if (data->code == ABS_Y) {
                m_y = data->value;
            } else {
                unknown = true;
            }
        } else if (data->type == EV_REL) {
            if (data->code == REL_X) {
                m_x += data->value;
            } else if (data->code == REL_Y) {
                m_y += data->value;
            } else {
                unknown = true;
            }
        } else if (data->type == EV_KEY && data->code == BTN_TOUCH) {
            m_buttons = data->value ? Qt::LeftButton : 0;
        } else if (data->type == EV_KEY) {
            int button = 0;
            switch (data->code) {
            case BTN_LEFT: button = Qt::LeftButton; break;
            case BTN_MIDDLE: button = Qt::MidButton; break;
            case BTN_RIGHT: button = Qt::RightButton; break;
            }
            if (data->value)
                m_buttons |= button;
            else
                m_buttons &= ~button;
        } else if (data->type == EV_SYN && data->code == SYN_REPORT) {
            QPoint pos(m_x, m_y);
            pos = m_handler->transform(pos);
            m_handler->limitToScreen(pos);
            m_handler->mouseChanged(pos, m_buttons);
        } else if (data->type == EV_MSC && data->code == MSC_SCAN) {
            // kernel encountered an unmapped key - just ignore it
            continue;
        } else {
            unknown = true;
        }
        if (unknown) {
            qWarning("unknown mouse event type=%x, code=%x, value=%x", data->type, data->code, data->value);
        }
    }

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In the code , It seems that the Qt/E did not support the mouse wheel (when use linux input driver).

I want to know does the Qt/E support the mouse wheel (when use linux input driver) ?
or something wrong with my Qt configure ?