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/**
* @file llfocusmgr.h
* @brief LLFocusMgr base class
*
* $LicenseInfo:firstyear=2002&license=viewergpl$
*
* Copyright (c) 2002-2009, 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.
* $/LicenseInfo$
*/
// Singleton that manages keyboard and mouse focus
#ifndef LL_LLFOCUSMGR_H
#define LL_LLFOCUSMGR_H
#include "llstring.h"
#include "llframetimer.h"
#include "llui.h"
class LLUICtrl;
class LLMouseHandler;
class LLView;
// NOTE: the LLFocusableElement class declaration has been moved here from lluictrl.h.
class LLFocusableElement
{
friend class LLFocusMgr; // allow access to focus change handlers
public:
LLFocusableElement();
virtual ~LLFocusableElement();
virtual void setFocus( BOOL b );
virtual BOOL hasFocus() const;
typedef boost::function<void(LLFocusableElement*, void*)> focus_callback_t;
void setFocusLostCallback(focus_callback_t cb, void* user_data = NULL) { mFocusLostCallback = cb; mFocusCallbackUserData = user_data; }
void setFocusReceivedCallback(focus_callback_t cb, void* user_data = NULL) { mFocusReceivedCallback = cb; mFocusCallbackUserData = user_data; }
void setFocusChangedCallback(focus_callback_t cb, void* user_data = NULL ) { mFocusChangedCallback = cb; mFocusCallbackUserData = user_data; }
void setTopLostCallback(focus_callback_t cb, void* user_data = NULL ) { mTopLostCallback = cb; mFocusCallbackUserData = user_data; }
// These were brought up the hierarchy from LLView so that we don't have to use dynamic_cast when dealing with keyboard focus.
virtual BOOL handleKey(KEY key, MASK mask, BOOL called_from_parent);
virtual BOOL handleUnicodeChar(llwchar uni_char, BOOL called_from_parent);
protected:
virtual void onFocusReceived();
virtual void onFocusLost();
virtual void onTopLost(); // called when registered as top ctrl and user clicks elsewhere
focus_callback_t mFocusLostCallback;
focus_callback_t mFocusReceivedCallback;
focus_callback_t mFocusChangedCallback;
focus_callback_t mTopLostCallback;
void* mFocusCallbackUserData;
};
class LLFocusMgr
{
public:
LLFocusMgr();
~LLFocusMgr() { mFocusHistory.clear(); }
// Mouse Captor
void setMouseCapture(LLMouseHandler* new_captor); // new_captor = NULL to release the mouse.
LLMouseHandler* getMouseCapture() const { return mMouseCaptor; }
void removeMouseCaptureWithoutCallback( const LLMouseHandler* captor );
BOOL childHasMouseCapture( const LLView* parent ) const;
// Keyboard Focus
void setKeyboardFocus(LLFocusableElement* new_focus, BOOL lock = FALSE, BOOL keystrokes_only = FALSE); // new_focus = NULL to release the focus.
LLFocusableElement* getKeyboardFocus() const { return mKeyboardFocus; }
LLFocusableElement* getLastKeyboardFocus() const { return mLastKeyboardFocus; }
BOOL childHasKeyboardFocus( const LLView* parent ) const;
void removeKeyboardFocusWithoutCallback( const LLFocusableElement* focus );
BOOL getKeystrokesOnly() { return mKeystrokesOnly; }
void setKeystrokesOnly(BOOL keystrokes_only) { mKeystrokesOnly = keystrokes_only; }
F32 getFocusFlashAmt() const;
S32 getFocusFlashWidth() const { return llround(lerp(1.f, 3.f, getFocusFlashAmt())); }
LLColor4 getFocusColor() const;
void triggerFocusFlash();
BOOL getAppHasFocus() const { return mAppHasFocus; }
void setAppHasFocus(BOOL focus);
LLUICtrl* getLastFocusForGroup(LLView* subtree_root) const;
void clearLastFocusForGroup(LLView* subtree_root);
// If setKeyboardFocus(NULL) is called, and there is a non-NULL default
// keyboard focus view, focus goes there. JC
void setDefaultKeyboardFocus(LLFocusableElement* default_focus) { mDefaultKeyboardFocus = default_focus; }
LLFocusableElement* getDefaultKeyboardFocus() const { return mDefaultKeyboardFocus; }
// Top View
void setTopCtrl(LLUICtrl* new_top);
LLUICtrl* getTopCtrl() const { return mTopCtrl; }
void removeTopCtrlWithoutCallback( const LLUICtrl* top_view );
BOOL childIsTopCtrl( const LLView* parent ) const;
// All Three
void releaseFocusIfNeeded( const LLView* top_view );
void lockFocus();
void unlockFocus();
BOOL focusLocked() const { return mLockedView != NULL; }
void addFocusChangeCallback(const boost::signals2::signal<void ()>::slot_type& cb)
{
mFocusChangeSignal.connect(cb);
}
private:
LLUICtrl* mLockedView;
// Mouse Captor
LLMouseHandler* mMouseCaptor; // Mouse events are premptively routed to this object
// Keyboard Focus
LLFocusableElement* mKeyboardFocus; // Keyboard events are preemptively routed to this object
LLFocusableElement* mLastKeyboardFocus; // who last had focus
LLFocusableElement* mDefaultKeyboardFocus;
BOOL mKeystrokesOnly;
// caching list of keyboard focus ancestors for calling onFocusReceived and onFocusLost
typedef std::list<LLHandle<LLView> > view_handle_list_t;
view_handle_list_t mCachedKeyboardFocusList;
// Top View
LLUICtrl* mTopCtrl;
LLFrameTimer mFocusFlashTimer;
BOOL mAppHasFocus;
typedef std::map<LLHandle<LLView>, LLHandle<LLView> > focus_history_map_t;
focus_history_map_t mFocusHistory;
boost::signals2::signal<void()> mFocusChangeSignal;
#ifdef _DEBUG
std::string mMouseCaptorName;
std::string mKeyboardFocusName;
std::string mTopCtrlName;
#endif
};
extern LLFocusMgr gFocusMgr;
#endif // LL_LLFOCUSMGR_H
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