C++ MultiColumnList::getVertScrollbar方法代码示例

    Rectf FalagardMultiColumnList::getListRenderArea(void) const
    {
        MultiColumnList* w = (MultiColumnList*)d_window;
        // get WidgetLookFeel for the assigned look.
        const WidgetLookFeel& wlf = getLookNFeel();
        bool v_visible = w->getVertScrollbar()->isVisible();
        bool h_visible = w->getHorzScrollbar()->isVisible();

        // if either of the scrollbars are visible, we might want to use another item rendering area
        if (v_visible || h_visible)
        {
            String area_name("ItemRenderingArea");

            if (h_visible)
            {
                area_name += "H";
            }
            if (v_visible)
            {
                area_name += "V";
            }
            area_name += "Scroll";

            if (wlf.isNamedAreaDefined(area_name))
            {
                return wlf.getNamedArea(area_name).getArea().getPixelRect(*w);
            }
        }

        // default to plain ItemRenderingArea
        return wlf.getNamedArea("ItemRenderingArea").getArea().getPixelRect(*w);
    }

    void FalagardMultiColumnList::render()
    {
        MultiColumnList* w = (MultiColumnList*)d_window;
        const ListHeader* header = w->getListHeader();
        const Scrollbar* vertScrollbar = w->getVertScrollbar();
        const Scrollbar* horzScrollbar = w->getHorzScrollbar();

        // render general stuff before we handle the items
        cacheListboxBaseImagery();

        //
        // Render list items
        //
        Vector3f itemPos;
        Sizef itemSize;
        Rectf itemClipper, itemRect;

        // calculate position of area we have to render into
        Rectf itemsArea(getListRenderArea());

        // set up initial positional details for items
        itemPos.d_y = itemsArea.top() - vertScrollbar->getScrollPosition();
        itemPos.d_z = 0.0f;

        const float alpha = w->getEffectiveAlpha();

        // loop through the items
        for (uint i = 0; i < w->getRowCount(); ++i)
        {
            // set initial x position for this row.
            itemPos.d_x = itemsArea.left() - horzScrollbar->getScrollPosition();

            // calculate height for this row.
            itemSize.d_height = w->getHighestRowItemHeight(i);

            // loop through the columns in this row
            for (uint j = 0; j < w->getColumnCount(); ++j)
            {
                // allow item to use full width of the column
                itemSize.d_width = CoordConverter::asAbsolute(header->getColumnWidth(j), header->getPixelSize().d_width);

                ListboxItem* item = w->getItemAtGridReference(MCLGridRef(i,j));

                // is the item for this column set?
                if (item)
                {
                    // calculate destination area for this item.
                    itemRect.left(itemPos.d_x);
                    itemRect.top(itemPos.d_y);
                    itemRect.setSize(itemSize);
                    itemClipper = itemRect.getIntersection(itemsArea);

                    // skip this item if totally clipped
                    if (itemClipper.getWidth() == 0)
                    {
                        itemPos.d_x += itemSize.d_width;
                        continue;
                    }

                    // draw this item
                    item->draw(w->getGeometryBuffer(), itemRect, alpha, &itemClipper);
                }

                // update position for next column.
                itemPos.d_x += itemSize.d_width;
            }

            // update position ready for next row
            itemPos.d_y += itemSize.d_height;
        }
    }