コード例 #1
0
void RenderListBox::autoscroll()
{
    IntPoint pos = document()->frame()->view()->windowToContents(document()->frame()->eventHandler()->currentMousePosition());

    int rx = 0;
    int ry = 0;
    absolutePosition(rx, ry);
    int offsetX = pos.x() - rx;
    int offsetY = pos.y() - ry;
    
    int endIndex = -1;
    int rows = numVisibleItems();
    int offset = m_indexOffset;
    if (offsetY < borderTop() + paddingTop() && scrollToRevealElementAtListIndex(offset - 1))
        endIndex = offset - 1;
    else if (offsetY > height() - paddingBottom() - borderBottom() && scrollToRevealElementAtListIndex(offset + rows))
        endIndex = offset + rows - 1;
    else
        endIndex = listIndexAtOffset(offsetX, offsetY);

    if (endIndex >= 0) {
        HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
        m_inAutoscroll = true;
        if (!select->multiple())
            select->setActiveSelectionAnchorIndex(endIndex);
        select->setActiveSelectionEndIndex(endIndex);
        select->updateListBoxSelection(!select->multiple());
        m_inAutoscroll = false;
    }
}
コード例 #2
0
void RenderListBox::autoscroll()
{
    IntPoint pos = frame()->view()->windowToContents(frame()->eventHandler()->currentMousePosition());

    int endIndex = scrollToward(pos);
    if (endIndex >= 0) {
        HTMLSelectElement* select = toHTMLSelectElement(node());
        m_inAutoscroll = true;

        if (!select->multiple())
            select->setActiveSelectionAnchorIndex(endIndex);

        select->setActiveSelectionEndIndex(endIndex);
        select->updateListBoxSelection(!select->multiple());
        m_inAutoscroll = false;
    }
}