llscrollingpanellist.cpp

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#include "linden_common.h"
#include "llstl.h"

#include "llscrollingpanellist.h"

static LLRegisterWidget<LLScrollingPanelList> r("scrolling_panel_list");


// LLScrollingPanelList

// This could probably be integrated with LLScrollContainer -SJB

void LLScrollingPanelList::clearPanels()
{
        deleteAllChildren();
        mPanelList.clear();
        reshape( 1, 1, FALSE );
}

void LLScrollingPanelList::addPanel( LLScrollingPanel* panel )
{
        addChildAtEnd( panel );
        mPanelList.push_front( panel );
        
        const S32 GAP_BETWEEN_PANELS = 6;

        // Resize this view
        S32 total_height = 0;
        S32 max_width = 0;
        S32 cur_gap = 0;
        for (std::deque<LLScrollingPanel*>::iterator iter = mPanelList.begin();
                 iter != mPanelList.end(); ++iter)
        {
                LLScrollingPanel *childp = *iter;
                total_height += childp->getRect().getHeight() + cur_gap;
                max_width = llmax( max_width, childp->getRect().getWidth() );
                cur_gap = GAP_BETWEEN_PANELS;
        }
        reshape( max_width, total_height, FALSE );

        // Reposition each of the child views
        S32 cur_y = total_height;
        for (std::deque<LLScrollingPanel*>::iterator iter = mPanelList.begin();
                 iter != mPanelList.end(); ++iter)
        {
                LLScrollingPanel *childp = *iter;
                cur_y -= childp->getRect().getHeight();
                childp->translate( -childp->getRect().mLeft, cur_y - childp->getRect().mBottom);
                cur_y -= GAP_BETWEEN_PANELS;
        }
}
        
void LLScrollingPanelList::updatePanels(BOOL allow_modify)
{
    for (std::deque<LLScrollingPanel*>::iterator iter = mPanelList.begin();
                 iter != mPanelList.end(); ++iter)
    {
                LLScrollingPanel *childp = *iter;
                childp->updatePanel(allow_modify);
    }
}

void LLScrollingPanelList::updatePanelVisiblilty()
{
        // Determine visibility of children.
        S32 BORDER_WIDTH = 2;  // HACK

        LLRect parent_local_rect = getParent()->getRect();
        parent_local_rect.stretch( -BORDER_WIDTH );
        
        LLRect parent_screen_rect;
        getParent()->localPointToScreen( 
                BORDER_WIDTH, 0, 
                &parent_screen_rect.mLeft, &parent_screen_rect.mBottom );
        getParent()->localPointToScreen( 
                parent_local_rect.getWidth() - BORDER_WIDTH, parent_local_rect.getHeight() - BORDER_WIDTH,
                &parent_screen_rect.mRight, &parent_screen_rect.mTop );

        for (std::deque<LLScrollingPanel*>::iterator iter = mPanelList.begin();
                 iter != mPanelList.end(); ++iter)
        {
                LLScrollingPanel *childp = *iter;
                const LLRect& local_rect = childp->getRect();
                LLRect screen_rect;
                childp->localPointToScreen( 
                        0, 0, 
                        &screen_rect.mLeft, &screen_rect.mBottom );
                childp->localPointToScreen(
                        local_rect.getWidth(), local_rect.getHeight(),
                        &screen_rect.mRight, &screen_rect.mTop );

                BOOL intersects = 
                        ( (screen_rect.mRight > parent_screen_rect.mLeft) && (screen_rect.mLeft < parent_screen_rect.mRight) ) && 
                        ( (screen_rect.mTop > parent_screen_rect.mBottom) && (screen_rect.mBottom < parent_screen_rect.mTop) );

                childp->setVisible( intersects );
        }
}


void LLScrollingPanelList::draw()
{
        updatePanelVisiblilty();

        LLUICtrl::draw();
}


// static
LLView* LLScrollingPanelList::fromXML(LLXMLNodePtr node, LLView *parent, LLUICtrlFactory *factory)
{
    LLString name("scrolling_panel_list");
    node->getAttributeString("name", name);

    LLRect rect;
    createRect(node, rect, parent, LLRect());

    LLScrollingPanelList* scrolling_panel_list = new LLScrollingPanelList(name, rect);
    scrolling_panel_list->initFromXML(node, parent);
    return scrolling_panel_list;
}

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