org.zkoss.zul
Interface GroupsModel<D,H,F>

All Known Implementing Classes:
AbstractGroupsModel, GroupsModelArray, SimpleGroupsModel

public interface GroupsModel<D,H,F>

The interface defines a suitable data model for grouping Listbox and Grid.

H: the class representing a group header, F: the class representing a group footer, and D: the class representing each item of data (in a group).

If the data model is used with sortable listbox or grid, the developer must also implement GroupsSortableModel.

For more information, please refer to ZK Developer's Reference: Groups Model

Since:
3.5.0
Author:
tomyeh
See Also:
GroupsSortableModel, ListModel

Method Summary
 void addGroupsDataListener(GroupsDataListener l)
          Adds a listener to the groups that's notified each time a change to the data model occurs.
 boolean addOpenGroup(int groupIndex)
          Opens the group at the specified index.
 D getChild(int groupIndex, int index)
          Returns the child value of the specified group at the specified index.
 int getChildCount(int groupIndex)
          Returns the number of children of the specified group.
 H getGroup(int groupIndex)
          Returns the group value at the specified index.
 int getGroupCount()
          Returns the number of groups.
 F getGroupfoot(int groupIndex)
          Returns the foot value of the specified group, or null if the specified group does not have any foot.
 boolean hasGroupfoot(int groupIndex)
          Returns if the specified group has a foot value.
 boolean isGroupOpened(int groupIndex)
          Whether the group is open at the specified index.
 void removeGroupsDataListener(GroupsDataListener l)
          Removes a listener from the groups that's notified each time a change to the data model occurs.
 boolean removeOpenGroup(int groupIndex)
          Closes the group at the specified index.
 

Method Detail

getGroup

H getGroup(int groupIndex)
Returns the group value at the specified index. It is used to render Group and Listgroup.

Parameters:
groupIndex - the index of the group.

getGroupCount

int getGroupCount()
Returns the number of groups.


getChild

D getChild(int groupIndex,
           int index)
Returns the child value of the specified group at the specified index.

Parameters:
groupIndex - the index of the group.
index - the index of the element in the group.

getChildCount

int getChildCount(int groupIndex)
Returns the number of children of the specified group.

Note: it does not include the groot foot (getGroupfoot(int)).

Parameters:
groupIndex - the index of the group.

getGroupfoot

F getGroupfoot(int groupIndex)
Returns the foot value of the specified group, or null if the specified group does not have any foot. It is used to render Groupfoot and Listgroupfoot.

Note: it is ignored if hasGroupfoot(int) returns false.

Parameters:
groupIndex - the index of the group.

hasGroupfoot

boolean hasGroupfoot(int groupIndex)
Returns if the specified group has a foot value.

Parameters:
groupIndex - the index of the group.

addGroupsDataListener

void addGroupsDataListener(GroupsDataListener l)
Adds a listener to the groups that's notified each time a change to the data model occurs.


removeGroupsDataListener

void removeGroupsDataListener(GroupsDataListener l)
Removes a listener from the groups that's notified each time a change to the data model occurs.


isGroupOpened

boolean isGroupOpened(int groupIndex)
Whether the group is open at the specified index. It is used to render Group and Listgroup.

Default: true

Parameters:
groupIndex - the index of the group.
Since:
6.0.0

addOpenGroup

boolean addOpenGroup(int groupIndex)
Opens the group at the specified index.

Parameters:
groupIndex - the index of the group.
Returns:
if it has been added successfully; false if it was opened.
Since:
6.0.0

removeOpenGroup

boolean removeOpenGroup(int groupIndex)
Closes the group at the specified index.

Parameters:
groupIndex - the index of the group.
Returns:
if it has been removed successfully; false if it was closed.
Since:
6.0.0


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