Use of tags in cakncolumnlistbox

The use of tags in cakncolumnlistbox is quite common. It is mainly used when multiple items are selected at the same time. Its main implementation steps are as follows:

1. Construction

Isavedgameslistbox-> constructl (this, eaknlistboxmarkablelist );

Use the eaknlistboxmarkablelist flag

2. Mark, unmark, mark all, and cancel all functions

case EAknCmdMark:case EAknCmdUnmark:case EAknMarkAll:case EAknUnmarkAll:{iAppContainer->HandleMarkCommandL (aCommand);break;}void CMarkableListContainer::HandleMarkCommandL(TInt aCommand){if (iSavedGamesListBox){AknSelectionService::HandleMarkableListProcessCommandL (aCommand, iSavedGamesListBox);}}

It can also be implemented using another method:

void CMarkableListContainer::HandleMarkL(){TInt index=iSavedGamesListBox->CurrentItemIndex();if(index<0)return;iSavedGamesListBox->View()->SelectItemL(index);}void CMarkableListContainer::HandleUnMarkL(){TInt index=iSavedGamesListBox->CurrentItemIndex();if(index<0)return;iSavedGamesListBox->View()->DeselectItem(index);}void CMarkableListContainer::HandleMarkAllL(){CTextListBoxModel* model = iSavedGamesListBox->Model();TInt itemCount = model->NumberOfItems();CListBoxView* listBoxView = iSavedGamesListBox->View();for (TUint i = 0; i < itemCount; i++){listBoxView->SelectItemL(i);}}void CMarkableListContainer::HandleUnMarkAllL(){CTextListBoxModel* model = iSavedGamesListBox->Model();TInt itemCount = model->NumberOfItems();CListBoxView* listBoxView = iSavedGamesListBox->View();for (TUint i = 0; i < itemCount; i++){listBoxView->DeselectItem(i);}}

 

Implementation of the reverse mark function:

void CMarkableListContainer::HandleMarkCommandOthersL(){CTextListBoxModel* model = iSavedGamesListBox->Model();TInt itemCount = model->NumberOfItems();CListBoxView* listBoxView = iSavedGamesListBox->View();for (TUint i = 0; i < itemCount; i++){if(listBoxView->ItemIsSelected(i)){listBoxView->DeselectItem(i);}else{listBoxView->SelectItemL(i);}}}