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/**
* @file llfocusmgr.h
* @brief LLFocusMgr base class
*
* $LicenseInfo:firstyear=2002&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
// 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::signals2::signal<void(LLFocusableElement*)> focus_signal_t;
boost::signals2::connection setFocusLostCallback( const focus_signal_t::slot_type& cb);
boost::signals2::connection setFocusReceivedCallback(const focus_signal_t::slot_type& cb);
boost::signals2::connection setFocusChangedCallback(const focus_signal_t::slot_type& cb);
boost::signals2::connection setTopLostCallback(const focus_signal_t::slot_type& cb);
// 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 handleKeyUp(KEY key, MASK mask, bool called_from_parent);
virtual bool handleUnicodeChar(llwchar uni_char, bool called_from_parent);
/**
* If true this LLFocusableElement wants to receive KEYUP and KEYDOWN messages
* even for normal character strokes.
* Default implementation returns false.
*/
virtual bool wantsKeyUpKeyDown() const;
virtual bool wantsReturnKey() const;
virtual void onTopLost(); // called when registered as top ctrl and user clicks elsewhere
protected:
virtual void onFocusReceived();
virtual void onFocusLost();
focus_signal_t* mFocusLostCallback;
focus_signal_t* mFocusReceivedCallback;
focus_signal_t* mFocusChangedCallback;
focus_signal_t* mTopLostCallback;
};
class LLFocusMgr
{
public:
LLFocusMgr();
~LLFocusMgr();
// 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() const { return mKeystrokesOnly; }
void setKeystrokesOnly(bool keystrokes_only) { mKeystrokesOnly = keystrokes_only; }
F32 getFocusFlashAmt() const;
S32 getFocusFlashWidth() const { return ll_round(lerp(1.f, 3.f, getFocusFlashAmt())); }
LLColor4 getFocusColor() const;
void triggerFocusFlash();
bool getAppHasFocus() const { return mAppHasFocus; }
void setAppHasFocus(bool focus);
LLView* 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( LLView* top_view );
void lockFocus();
void unlockFocus();
bool focusLocked() const { return mLockedView != NULL; }
bool keyboardFocusHasAccelerators() const;
struct Impl;
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;
// Top View
LLUICtrl* mTopCtrl;
LLFrameTimer mFocusFlashTimer;
bool mAppHasFocus;
Impl * mImpl;
};
extern LLFocusMgr gFocusMgr;
#endif // LL_LLFOCUSMGR_H
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