Mousewheel in ItemListbox

[MarkR]

The mousewheel functionality in the ItemListbox shows a strange behavior, which is a little bit hard to describe:
Scrolling works initially, but if you scroll near to the end of the list, the scrolling functionality stops until you change the y-position of the mouse cursor.

Not sure if this has something to do with the "setMouseInputPropagationEnabled" / "setMousePassThroughEnabled".
The code basically looks like this:

Code: Select all

    CEGUI::WindowManager& wmgr = CEGUI::WindowManager::getSingleton();
    CEGUI::Window* myRoot = wmgr.createWindow( "DefaultWindow", "root" );
    myRoot->setMousePassThroughEnabled(true);
    CEGUI::System::getSingleton().setGUISheet( myRoot );

    CEGUI::FrameWindow* mainWindow = (CEGUI::FrameWindow*)wmgr.createWindow( "WindowsLook/FrameWindow" );
    myRoot->addChildWindow( mainWindow );
    mainWindow->setPosition( CEGUI::UVector2( CEGUI::UDim( 0, 50.0f ), CEGUI::UDim( 0, 50.0f ) );
    mainWindow->setSize( CEGUI::UVector2( CEGUI::UDim( 0, 150.0f ), CEGUI::UDim( 0, 80.0f ) );
    mainWindow->setMouseInputPropagationEnabled(true);

    CEGUI::ItemListbox* listBox = (CEGUI::ItemListbox*)wmgr.createWindow("WindowsLook/ItemListbox", "playerList");
    mainWindow->addChildWindow(listBox);
    listBox->setPosition(CEGUI::UVector2(CEGUI::UDim(0, 0), CEGUI::UDim(0, 0)));
    listBox->setSize(CEGUI::UVector2(CEGUI::UDim(1.0f, 0), CEGUI::UDim(1.0f, 0)));
    listBox->setSortEnabled(true);
    listBox->setMouseInputPropagationEnabled(true);

    for (size_t i = 0; i < 20; ++i)
    {
        CEGUI::ItemEntry* item = (CEGUI::ItemEntry*)CEGUI::WindowManager::getSingleton().createWindow("WindowsLook/ItemEntry");
        item->setText("Test Item");
        listBox->addItem(item);
    }


[CrazyEddie]

Thanks for the report; I'll check it out and report back soon.

CE.

[CrazyEddie]

I ran a little test on this but found no issues. I made a video of my endeavours just in case you could see either something I could not, or whether I tested it incorrectly



Cheers

CE

[MarkR]

I found it. I didn't call

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item->setMouseInputPropagationEnabled(true);

on every item, but I disabled some of them. The mousewheel worked correctly while the mouse was hovering over an disabled item, while the enabled item "ate" the mousewheel events.

[CrazyEddie]

Yeah, ok, that makes sense.

If your ItemEntry based content is skinned, you should consider having that property set automatically via the WidgetLook definition

CE.