Unigine::WidgetTreeBox Class

int init() {

Gui gui = engine.getGui();

WidgetTreeBox tree = new WidgetTreeBox(gui);

tree.addItem("1st item");  // Add items into the tree.
tree.addItem("2nd item");
tree.addItem("3rd item");
tree.addItem("4th item");

tree.addItemChild(0,1);   // Make a 2nd item a child of the 1st one.
tree.setItemFolded(0,1);  // Collapse children of the 1st child.

WidgetWindow window = new WidgetWindow(gui);  // Create a window.
gui.addChild(window,GUI_ALIGN_CENTER);

window.addChild(tree,GUI_ALIGN_CENTER); // Render a tree in the window.

return 1;
}

WidgetTreeBox Class

Members

---

static WidgetTreeBoxPtr create ( const Ptr<Gui> & gui ) #

Constructor. Creates an empty tree box and adds it to the specified GUI.

Arguments

• const Ptr<Gui> & gui - GUI, to which the new tree box will belong.

static WidgetTreeBoxPtr create ( ) #

Constructor. Creates an empty tree box and adds it to the Engine GUI.

void setCurrentItem ( int item ) #

Places focus on a given item (multi-selection mode).

Arguments

• int item - Item ID.

int getCurrentItem ( ) const#

Returns the item currently in focus (multi-selection mode).

Return value

Item ID.

const char * getCurrentItemData ( ) const#

Returns the text data of the currently focused item (multi-selection mode). The data can be used as a text identifier of the item (instead of using the number of the item).

Return value

Item data.

const char * getCurrentItemText ( ) const#

Returns the text of the currently focused item (multi-selection mode).

Return value

Item text.

void setEditable ( bool editable ) #

Sets a value indicating if item hierarchy can be edited.

Arguments

• bool editable - 1 to make the hierarchy editable, 0 to make it read-only.

bool isEditable ( ) const#

Returns a value indicating if item hierarchy can be edited. The default is 0.

Return value

1 if the hierarchy can be edited; otherwise, 0.

void setImage ( const Ptr<Image> & image ) #

Sets an image with mini-icons to be used with items. The image is a vertical strip of square icons.

Arguments

• const Ptr<Image> & image - Image to set.

Ptr<Image> getImage ( ) const#

Returns the image with mini-icons.

Return value

Image with mini-icons (the vertical strip of square icons).

int getItem ( int num ) const#

Returns the ID of a given item by its number. The IDs are unique, and the numbers simply point at the place in the list of all items.

Arguments

• int num - Item ID in range from 0 to the total number of items.

Return value

Item ID.

int getItemChild ( int item, int num ) const#

Returns a child of a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.
• int num - Child number in the list of children in range from 0 to the total number.

Return value

Child item ID.

int isItemChild ( int item, int child ) const#

Checks if a given item is a child of another specified item.

Arguments

• int item - Item ID in range from 0 to the total number of items.
• int child - Child item ID.

Return value

1 if child is actually a child of the item; otherwise, 0.

void setItemColor ( int item, const Math::vec4 & color ) #

Sets a custom color for a given item.

Arguments

• int item - Item number in range from 0 to the total number of items.
• const Math::vec4 & color - Color to set.

Math::vec4 getItemColor ( int item ) const#

Returns a color set to a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.

Return value

Color.

void setItemData ( int item, const char * str ) #

Sets a custom text data for the given item. The data can be used as a text identifier of the item (instead of using the item number).

Arguments

• int item - Item ID in range from 0 to the total number of items.
• const char * str - Text data to be set.

const char * getItemData ( int item ) const#

Returns the text data of the item with the specified ID. The data can be used as a text identifier of the item (instead of using the item number).

Arguments

• int item - Item ID in range from 0 to the total number of items.

Return value

Item text data.

void setItemFolded ( int item, int folded ) #

Expands or collapses an hierarchy of a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.
• int folded - 1 to collapse the item hierarchy, 0 to expand it.

int isItemFolded ( int item ) const#

Returns a value indicating if a given item is collapsed.

Arguments

• int item - Item ID in range from 0 to the total number of items.

Return value

1 if the item is collapsed; otherwise, 0.

void setItemHidden ( int item, int hidden ) #

Sets a value indicating if a given item is hidden.

Arguments

• int item - Item ID in range from 0 to the total number of items.
• int hidden - 1 to hide the item, 0 to show it.

int isItemHidden ( int item ) const#

Returns a value indicating if an item is hidden or not.

Arguments

• int item - Item ID in range from 0 to the total number of items.

Return value

1 if the item is hidden; otherwise, 0.

void setItemParent ( int item, int parent ) #

Sets a parent for a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.
• int parent - Parent item ID. -1 removes the current parent.

int getItemParent ( int item ) const#

Returns the parent of a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.

Return value

Parent item ID.

void getItems ( Vector< int > & OUT_items ) const#

Returns all items in the tree box.

Arguments

• Vector< int > & OUT_items - An array with item IDs.
  Notice

  This output buffer is to be filled by the Engine as a result of executing the method.

void setItemSelectable ( int item, int selectable ) #

Sets a value indicating if a given item can be selected.

Arguments

• int item - Item ID in range from 0 to the total number of items.
• int selectable - 1 to set the item as selectable, 0 to set it as unselectable.

int isItemSelectable ( int item ) const#

Returns a value indicating if a given item can be selected.

Arguments

• int item - Item ID in range from 0 to the total number of items.

Return value

1 if the item is selectable; otherwise, 0.

void setItemSelected ( int item, int selected ) #

Selects or deselects a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.
• int selected - 1 to select the item, 0 to deselect it.

int isItemSelected ( int item ) const#

Returns a value indicating if a given item is selected.

Arguments

• int item - Item ID in range from 0 to the total number of items.

Return value

1 if the item is selected; otherwise, 0.

void setItemText ( int item, const char * str ) #

Sets a text for a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.
• const char * str - Item text.

const char * getItemText ( int item ) const#

Returns the text of a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.

Return value

Item text.

void setItemTexture ( int item, int texture ) #

Sets an icon for a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.
• int texture - Zero-based ID of the icon (i.e. number of the icon in the icon texture).

int getItemTexture ( int item ) const#

Returns the icon of a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.

Return value

Zero-based ID of the icon (i.e. number of the icon in the icon texture).

void setMultiSelection ( bool selection ) #

Enables or disables multiple selection of items.

Arguments

• bool selection - true to enable multiple selection, false to disable it.

bool isMultiSelection ( ) const#

Returns a value indicating if multiple selection of items is enabled. The default is 0.

Return value

true if several items can be selected at once; otherwise, false.

int getNumItemChildren ( int item ) const#

Returns the number of child items of a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.

Return value

Number of child items.

int getNumItems ( ) const#

Returns the number of visible items in the tree box. Items that are currently collapsed to a parent level are not returned.

Return value

Number of items.

int getNumSelectedItems ( ) const#

Returns number of selected items in the box (multi-selection mode).

Return value

Number of selected items.

int getSelectedItem ( int num ) const#

Returns ID of a selected item (multi-selection mode).

Arguments

• int num - Number of an item in the list of selected items.

Return value

ID of the selected item.

void setTexture ( const char * texture ) #

Sets a texture with mini-icons to be used with items. The texture is a vertical strip of square icons.

Arguments

• const char * texture - Path to a texture file.

const char * getTexture ( ) const#

Returns file name of the image with mini-icons. The texture is a vertical strip of square icons.

Return value

Path to the texture file.

int addItem ( const char * str, int texture = -1 ) #

Adds a new item with a given text and and an icon.

Arguments

• const char * str - Item text.
• int texture - Zero-based ID of the icon (i.e. number of the icon in the icon texture). -1 means that an item has no icon.

Return value

ID of the added item.

void addItemChild ( int item, int child ) #

Adds a child to a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.
• int child - Child item ID.

void clear ( ) #

Removes all items from the tree box.

void clearSelection ( ) #

Clears list of selected items.

void removeItem ( int item ) #

Removes a given item from the tree box. Children items will be kept.

Arguments

• int item - Item ID in range from 0 to the total number of items.

void removeItemChild ( int item, int child ) #

Removes a child of a given item.

Arguments

• int item - Item ID in range from 0 to the total number of items.
• int child - Child item ID.

void showItem ( int item ) #

Scrolls a tree box so that a given item is visible.

Arguments

• int item - Item ID in range from 0 to the total number of items.

void setSelectionColor ( const Math::vec4 & color ) #

Sets the color to be used to highlight the current selection for the widget.

Arguments

• const Math::vec4 & color - Four-component vector specifying the color in the RGBA format.

Math::vec4 getSelectionColor ( ) const#

Returns the current color used to highlight the current selection for the widget.

Return value

Four-component vector specifying the color in the RGBA format.

int getItemUnderCursor ( ) const#

Returns the ID of the item, over which the cursor is currently hovering.

Return value

Item ID in range from 0 to the total number of items.

void setNeedSortChildren ( bool children ) #

Sets the value specifying if sorting of children is required. Sorting is performed with the default compare algorithm.

Arguments

• bool children - true to enable sorting of children, false to disable it.

bool isNeedSortChildren ( ) const#

Returns the value specifying if sorting of children is required. Sorting is performed with the default compare algorithm.

Return value

true if sorting of children is enabled, otherwise false.