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+/** 
+ * @file lllocationinputmonitorctrl.h
+ * @brief Combobox-like location input control
+ *
+ * $LicenseInfo:firstyear=2009&license=viewergpl$
+ * 
+ * Copyright (c) 2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLLOCATIONINPUTCTRL_H
+#define LL_LLLOCATIONINPUTCTRL_H
+
+#include "llbutton.h"
+#include "lluictrl.h"
+#include "llctrlselectioninterface.h"
+#include "llimagegl.h"
+#include "llrect.h"
+#include "llscrolllistitem.h"
+#include <boost/function.hpp>
+
+// Classes
+class LLButton;
+class LLFontGL;
+class LLLineEditor;
+class LLScrollListCtrl;
+class LLSquareButton;
+class LLUICtrlFactory;
+class LLViewBorder;
+
+/**
+ * Location input control.
+ * 
+ * This is currently just a copy of LLComboBox (which is not exactly what the nav bar needs).
+ * The only major difference so far is the way auto-completion works.
+ * 
+ * @see LLNavigationBar
+ */
+class LLLocationInputCtrl
+:	public LLUICtrl, public LLCtrlListInterface
+{
+	LOG_CLASS(LLLocationInputCtrl);
+	
+public:
+	struct Params 
+	:	public LLInitParam::Block<Params, LLUICtrl::Params>
+	{
+		Optional<bool>	allow_text_entry, select_on_focus;
+		Optional<S32>	max_chars;
+		Optional<commit_callback_t> prearrange_callback;
+		Optional<commit_callback_t> text_entry_callback;
+		Optional<commit_callback_t > selection_callback;
+		Optional<LLUIImage*> arrow_image;
+Multiple<LLScrollListItem::Params> items;
+		
+		Params() 
+		:	allow_text_entry("allow_text_entry", false),
+			select_on_focus("select_on_focus", true),
+			max_chars("max_chars", 20),
+			arrow_image("arrow_image", LLUI::getUIImage("combobox_arrow.tga")),
+			items("item")
+		{
+			addSynonym(items, "combo_item");
+		}
+	};
+
+	typedef enum e_preferred_position
+	{
+		ABOVE,
+		BELOW
+	} EPreferredPosition;
+
+	virtual ~LLLocationInputCtrl(); 
+protected:
+	friend class LLUICtrlFactory;
+	LLLocationInputCtrl(const Params&);
+public:
+	// LLView interface
+
+	virtual BOOL	postBuild();
+	virtual void	draw();
+	virtual void	onFocusLost();
+
+	virtual void	setEnabled(BOOL enabled);
+
+	virtual BOOL	handleToolTip(S32 x, S32 y, std::string& msg, LLRect* sticky_rect);
+	virtual BOOL	handleKeyHere(KEY key, MASK mask);
+	virtual BOOL	handleUnicodeCharHere(llwchar uni_char);
+
+	// LLUICtrl interface
+	virtual void	clear();					// select nothing
+	virtual void	onCommit();
+	virtual BOOL	acceptsTextInput() const		{ return mAllowTextEntry; }
+	virtual BOOL	isDirty() const;			// Returns TRUE if the user has modified this control.
+	virtual void	resetDirty();				// Clear dirty state
+
+	virtual void	setFocus(BOOL b);
+
+	// Selects item by underlying LLSD value, using LLSD::asString() matching.  
+	// For simple items, this is just the name of the label.
+	virtual void	setValue(const LLSD& value );
+
+	// Gets underlying LLSD value for currently selected items.  For simple
+	// items, this is just the label.
+	virtual LLSD	getValue() const;
+
+	void			setTextEntry(const LLStringExplicit& text);
+	void			setText(const LLStringExplicit& text);
+
+	LLScrollListItem*	add(const std::string& name, EAddPosition pos = ADD_BOTTOM, BOOL enabled = TRUE);	// add item "name" to menu
+	LLScrollListItem*	add(const std::string& name, const LLUUID& id, EAddPosition pos = ADD_BOTTOM, BOOL enabled = TRUE);
+	LLScrollListItem*	add(const std::string& name, void* userdata, EAddPosition pos = ADD_BOTTOM, BOOL enabled = TRUE);
+	LLScrollListItem*	add(const std::string& name, LLSD value, EAddPosition pos = ADD_BOTTOM, BOOL enabled = TRUE);
+	LLScrollListItem*	addSeparator(EAddPosition pos = ADD_BOTTOM);
+	BOOL			remove( S32 index );	// remove item by index, return TRUE if found and removed
+	void			removeall() { clearRows(); }
+
+	void			sortByName(BOOL ascending = TRUE); // Sort the entries in the combobox by name
+
+	// Select current item by name using selectItemByLabel.  Returns FALSE if not found.
+	BOOL			setSimple(const LLStringExplicit& name);
+	// Get name of current item. Returns an empty string if not found.
+	const std::string	getSimple() const;
+	// Get contents of column x of selected row
+	const std::string getSelectedItemLabel(S32 column = 0) const;
+
+	// Sets the label, which doesn't have to exist in the label.
+	// This is probably a UI abuse.
+	void			setLabel(const LLStringExplicit& name);
+
+	BOOL			remove(const std::string& name);	// remove item "name", return TRUE if found and removed
+	
+	BOOL			setCurrentByIndex( S32 index );
+	S32				getCurrentIndex() const;
+
+	virtual void	updateLayout();
+
+	//========================================================================
+	LLCtrlSelectionInterface* getSelectionInterface()	{ return (LLCtrlSelectionInterface*)this; };
+	LLCtrlListInterface* getListInterface()				{ return (LLCtrlListInterface*)this; };
+
+	// LLCtrlListInterface functions
+	// See llscrolllistctrl.h
+	virtual S32		getItemCount() const;
+	// Overwrites the default column (See LLScrollListCtrl for format)
+	virtual void 	addColumn(const LLSD& column, EAddPosition pos = ADD_BOTTOM);
+	virtual void 	clearColumns();
+	virtual void	setColumnLabel(const std::string& column, const std::string& label);
+	virtual LLScrollListItem* addElement(const LLSD& value, EAddPosition pos = ADD_BOTTOM, void* userdata = NULL);
+	virtual LLScrollListItem* addSimpleElement(const std::string& value, EAddPosition pos = ADD_BOTTOM, const LLSD& id = LLSD());
+	virtual void 	clearRows();
+	virtual void 	sortByColumn(const std::string& name, BOOL ascending);
+
+	// LLCtrlSelectionInterface functions
+	virtual BOOL	getCanSelect() const				{ return TRUE; }
+	virtual BOOL	selectFirstItem()					{ return setCurrentByIndex(0); }
+	virtual BOOL	selectNthItem( S32 index )			{ return setCurrentByIndex(index); }
+	virtual BOOL	selectItemRange( S32 first, S32 last );
+	virtual S32		getFirstSelectedIndex() const		{ return getCurrentIndex(); }
+	virtual BOOL	setCurrentByID( const LLUUID& id );
+	virtual LLUUID	getCurrentID() const;				// LLUUID::null if no items in menu
+	virtual BOOL	setSelectedByValue(const LLSD& value, BOOL selected);
+	virtual LLSD	getSelectedValue();
+	virtual BOOL	isSelected(const LLSD& value) const;
+	virtual BOOL	operateOnSelection(EOperation op);
+	virtual BOOL	operateOnAll(EOperation op);
+
+	//========================================================================
+	
+	void*			getCurrentUserdata();
+
+	void			setPrearrangeCallback( commit_callback_t cb ) { mPrearrangeCallback = cb; }
+	void			setTextEntryCallback( commit_callback_t cb ) { mTextEntryCallback = cb; }
+	void			setSelectionCallback( commit_callback_t cb ) { mSelectionCallback = cb; }
+
+	void			setButtonVisible(BOOL visible);
+
+	void			onButtonDown();
+	void			onItemSelected(const LLSD& data);
+	void			onTextCommit(const LLSD& data);
+
+	virtual void	updateSelection();
+	virtual void	showList();
+	virtual void	hideList();
+	
+	//========================================================================
+	BOOL childHasFocus() const; /// Is one of our children focused?
+	
+	BOOL	canCut()		const;
+	BOOL	canCopy()		const;
+	BOOL	canPaste()		const;
+	BOOL	canDeselect()	const;
+	BOOL	canSelectAll()	const;
+	
+	void	cut();
+	void	copy();
+	void	paste();
+	void	deleteSelection();
+	void	selectAll();
+	//========================================================================
+	
+	void	onTextEntry(LLLineEditor* line_editor);
+	
+protected:
+
+	void				prearrangeList(std::string filter = "");
+
+
+	LLButton*			mButton;
+	LLScrollListCtrl*	mList;
+	EPreferredPosition	mListPosition;
+	LLPointer<LLUIImage>	mArrowImage;
+	std::string			mLabel;
+	S32					mButtonPadding;
+	LLLineEditor*		mTextEntry;
+	BOOL				mAllowTextEntry;
+	BOOL				mSelectOnFocus;
+	BOOL				mHasAutocompletedText;
+	S32					mMaxChars;
+	BOOL				mTextEntryTentative;
+	commit_callback_t	mPrearrangeCallback;
+	commit_callback_t	mTextEntryCallback;
+	commit_callback_t	mSelectionCallback;
+};
+
+#endif