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// "$Id: Fl_Tree_Item.H 8340 2011-01-30 20:22:06Z greg.ercolano $"
//
#ifndef FL_TREE_ITEM_H
#define FL_TREE_ITEM_H
#include <FL/Fl.H>
#include <FL/Fl_Widget.H>
#include <FL/Fl_Image.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Tree_Item_Array.H>
#include <FL/Fl_Tree_Prefs.H>
//////////////////////
// FL/Fl_Tree_Item.H
//////////////////////
//
// Fl_Tree -- This file is part of the Fl_Tree widget for FLTK
// Copyright (C) 2009-2010 by Greg Ercolano.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
///
/// \file
/// \brief This file contains the definitions for Fl_Tree_Item
///
/// \brief Tree item
///
/// This class is a single tree item, and manages all of the item's attributes.
/// Fl_Tree_Item is used by Fl_Tree, which is comprised of many instances of Fl_Tree_Item.
///
/// Fl_Tree_Item is hierarchical; it dynamically manages an Fl_Tree_Item_Array of children
/// that are themselves instances of Fl_Tree_Item. Each item can have zero or more children.
/// When an item has children, close() and open() can be used to hide or show them.
///
/// Items have their own attributes; font size, face, color.
/// Items maintain their own hierarchy of children.
///
/// When you make changes to items, you'll need to tell the tree to redraw()
/// for the changes to show up.
///
class FL_EXPORT Fl_Tree_Item {
const char *_label; // label (memory managed)
Fl_Font _labelfont; // label's font face
Fl_Fontsize _labelsize; // label's font size
Fl_Color _labelfgcolor; // label's fg color
Fl_Color _labelbgcolor; // label's bg color
char _open; // item is open?
char _visible; // item is visible?
char _active; // item activated?
char _selected; // item selected?
int _xywh[4]; // xywh of this widget (if visible)
int _collapse_xywh[4]; // xywh of collapse icon (if any)
int _label_xywh[4]; // xywh of label
Fl_Widget *_widget; // item's label widget (optional)
Fl_Image *_usericon; // item's user-specific icon (optional)
Fl_Tree_Item_Array _children; // array of child items
Fl_Tree_Item *_parent; // parent item (=0 if root)
void *_userdata; // user data that can be associated with an item
protected:
void show_widgets();
void hide_widgets();
void draw_vertical_connector(int x, int y1, int y2, const Fl_Tree_Prefs &prefs);
void draw_horizontal_connector(int x1, int x2, int y, const Fl_Tree_Prefs &prefs);
public:
Fl_Tree_Item(const Fl_Tree_Prefs &prefs); // CTOR
~Fl_Tree_Item(); // DTOR
Fl_Tree_Item(const Fl_Tree_Item *o); // COPY CTOR
int x() const { return(_xywh[0]); }
int y() const { return(_xywh[1]); }
int w() const { return(_xywh[2]); }
int h() const { return(_xywh[3]); }
void draw(int X, int &Y, int W, Fl_Widget *tree, Fl_Tree_Item *itemfocus, const Fl_Tree_Prefs &prefs, int lastchild=1);
void show_self(const char *indent = "") const;
void label(const char *val);
const char *label() const;
/// Set a user-data value for the item.
inline void user_data( void* data ) { _userdata = data; }
/// Retrieve the user-data value that has been assigned to the item.
inline void* user_data() const { return _userdata; }
/// Set item's label font face.
void labelfont(Fl_Font val) {
_labelfont = val;
}
/// Get item's label font face.
Fl_Font labelfont() const {
return(_labelfont);
}
/// Set item's label font size.
void labelsize(Fl_Fontsize val) {
_labelsize = val;
}
/// Get item's label font size.
Fl_Fontsize labelsize() const {
return(_labelsize);
}
/// Set item's label foreground text color.
void labelfgcolor(Fl_Color val) {
_labelfgcolor = val;
}
/// Set item's label text color.
void labelcolor(Fl_Color val) {
_labelfgcolor = val;
}
/// Return item's label text color.
Fl_Color labelcolor() const {
return(_labelfgcolor);
}
/// Return item's label foreground text color.
Fl_Color labelfgcolor() const {
return(_labelfgcolor);
}
/// Set item's label background color.
void labelbgcolor(Fl_Color val) {
_labelbgcolor = val;
}
/// Return item's background text color.
Fl_Color labelbgcolor() const {
return(_labelbgcolor);
}
/// Assign an FLTK widget to this item.
void widget(Fl_Widget *val) {
_widget = val;
}
/// Return FLTK widget assigned to this item.
Fl_Widget *widget() const {
return(_widget);
}
/// Return the number of children this item has.
int children() const {
return(_children.total());
}
/// Return the child item for the given 'index'.
Fl_Tree_Item *child(int index) {
return(_children[index]);
}
/// Return the const child item for the given 'index'.
const Fl_Tree_Item *child(int t) const;
/// See if this item has children.
int has_children() const {
return(children());
}
int find_child(const char *name);
int find_child(Fl_Tree_Item *item);
int remove_child(Fl_Tree_Item *item);
int remove_child(const char *new_label);
void clear_children();
void swap_children(int ax, int bx);
int swap_children(Fl_Tree_Item *a, Fl_Tree_Item *b);
const Fl_Tree_Item *find_child_item(char **arr) const; // const
Fl_Tree_Item *find_child_item(char **arr); // non-const
const Fl_Tree_Item *find_item(char **arr) const; // const
Fl_Tree_Item *find_item(char **arr); // non-const
//////////////////
// Adding items
//////////////////
Fl_Tree_Item *add(const Fl_Tree_Prefs &prefs, const char *new_label);
Fl_Tree_Item *add(const Fl_Tree_Prefs &prefs, char **arr);
Fl_Tree_Item *insert(const Fl_Tree_Prefs &prefs, const char *new_label, int pos=0);
Fl_Tree_Item *insert_above(const Fl_Tree_Prefs &prefs, const char *new_label);
int depth() const;
Fl_Tree_Item *prev();
Fl_Tree_Item *next();
Fl_Tree_Item *next_sibling();
Fl_Tree_Item *prev_sibling();
Fl_Tree_Item *next_displayed(Fl_Tree_Prefs &prefs);
Fl_Tree_Item *prev_displayed(Fl_Tree_Prefs &prefs);
/// Return the parent for this item. Returns NULL if we are the root.
Fl_Tree_Item *parent() {
return(_parent);
}
/// Return the const parent for this item. Returns NULL if we are the root.
const Fl_Tree_Item *parent() const {
return(_parent);
}
/// Set the parent for this item.
/// Should only be used by Fl_Tree's internals.
///
void parent(Fl_Tree_Item *val) {
_parent = val;
}
//////////////////
// State
//////////////////
void open();
void close();
/// See if the item is 'open'.
int is_open() const {
return(_open?1:0);
}
/// See if the item is 'closed'.
int is_close() const {
return(_open?0:1);
}
/// Toggle the item's open/closed state.
void open_toggle() {
_open?close():open();
}
/// Change the item's selection state to the optionally specified 'val'.
/// If 'val' is not specified, the item will be selected.
///
void select(int val=1) {
_selected = val;
}
/// Toggle the item's selection state.
void select_toggle() {
if ( is_selected() ) {
deselect(); // deselect if selected
} else {
select(); // select if deselected
}
}
/// Select self and all children
/// Returns count of how many items were in the 'deselected' state,
/// ie. how many items were "changed".
///
int select_all() {
int count = 0;
if ( ! is_selected() ) {
select();
++count;
}
for ( int t=0; t<children(); t++ ) {
count += child(t)->select_all();
}
return(count);
}
/// Disable the item's selection state.
void deselect() {
_selected = 0;
}
/// Deselect self and all children
/// Returns count of how many items were in the 'selected' state,
/// ie. how many items were "changed".
///
int deselect_all() {
int count = 0;
if ( is_selected() ) {
deselect();
++count;
}
for ( int t=0; t<children(); t++ ) {
count += child(t)->deselect_all();
}
return(count);
}
/// See if the item is selected.
char is_selected() const {
return(_selected);
}
/// Change the item's activation state to the optionally specified 'val'.
///
/// When deactivated, the item will be 'grayed out'; the callback()
/// won't be invoked if the user clicks on the label. If the item
/// has a widget() associated with the item, its activation state
/// will be changed as well.
///
/// If 'val' is not specified, the item will be activated.
///
void activate(int val=1) {
_active = val;
if ( _widget && val != (int)_widget->active() ) {
if ( val ) {
_widget->activate();
} else {
_widget->deactivate();
}
_widget->redraw();
}
}
/// Deactivate the item; the callback() won't be invoked when clicked.
/// Same as activate(0)
///
void deactivate() {
activate(0);
}
/// See if the item is activated.
char is_activated() const {
return(_active);
}
/// See if the item is activated.
char is_active() const {
return(_active);
}
/// See if the item is visible.
int visible() const {
return(_visible ? 1 : 0);
}
int visible_r() const;
/// Set the user icon's image. '0' will disable.
void usericon(Fl_Image *val) {
_usericon = val;
}
/// Get the user icon. Returns '0' if disabled.
Fl_Image *usericon() const {
return(_usericon);
}
//////////////////
// Events
//////////////////
const Fl_Tree_Item *find_clicked(const Fl_Tree_Prefs &prefs) const;
Fl_Tree_Item *find_clicked(const Fl_Tree_Prefs &prefs);
int event_on_collapse_icon(const Fl_Tree_Prefs &prefs) const;
int event_on_label(const Fl_Tree_Prefs &prefs) const;
/// Is this item the root of the tree?
int is_root() const {
return(_parent==0?1:0);
}
};
#endif /*FL_TREE_ITEM_H*/
//
// End of "$Id: Fl_Tree_Item.H 8340 2011-01-30 20:22:06Z greg.ercolano $".
//
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