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/**
* @file llscrollcontainer.h
* @brief LLScrollContainer class header file.
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* 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
* $/LicenseInfo$
*/
#ifndef LL_LLSCROLLCONTAINER_H
#define LL_LLSCROLLCONTAINER_H
#include "lluictrl.h"
#ifndef LL_V4COLOR_H
#include "v4color.h"
#endif
#include "llcoord.h"
#include "llscrollbar.h"
class LLViewBorder;
class LLUICtrlFactory;
/*****************************************************************************
*
* A decorator view class meant to encapsulate a clipped region which is
* scrollable. It automatically takes care of pixel perfect scrolling
* and cliipping, as well as turning the scrollbars on or off based on
* the width and height of the view you're scrolling.
*
*****************************************************************************/
struct ScrollContainerRegistry : public LLChildRegistry<ScrollContainerRegistry>
{
LLSINGLETON_EMPTY_CTOR(ScrollContainerRegistry);
};
class LLScrollContainer : public LLUICtrl
{
public:
// Note: vertical comes before horizontal because vertical
// scrollbars have priority for mouse and keyboard events.
struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>
{
Optional<bool> is_opaque,
reserve_scroll_corner,
border_visible,
hide_scrollbar;
Optional<F32> min_auto_scroll_rate,
max_auto_scroll_rate;
Optional<LLUIColor> bg_color;
Optional<LLScrollbar::callback_t> scroll_callback;
Optional<S32> size;
Params();
};
// my valid children are stored in this registry
typedef ScrollContainerRegistry child_registry_t;
protected:
LLScrollContainer(const Params&);
friend class LLUICtrlFactory;
public:
virtual ~LLScrollContainer( void );
virtual void setValue(const LLSD& value) { mInnerRect.setValue(value); }
void setBorderVisible( BOOL b );
void scrollToShowRect( const LLRect& rect, const LLRect& constraint);
void scrollToShowRect( const LLRect& rect) { scrollToShowRect(rect, LLRect(0, mInnerRect.getHeight(), mInnerRect.getWidth(), 0)); }
void setReserveScrollCorner( BOOL b ) { mReserveScrollCorner = b; }
LLRect getVisibleContentRect();
LLRect getContentWindowRect();
virtual const LLRect getScrolledViewRect() const { return mScrolledView ? mScrolledView->getRect() : LLRect::null; }
void pageUp(S32 overlap = 0);
void pageDown(S32 overlap = 0);
void goToTop();
void goToBottom();
bool isAtTop() { return mScrollbar[VERTICAL]->isAtBeginning(); }
bool isAtBottom() { return mScrollbar[VERTICAL]->isAtEnd(); }
S32 getBorderWidth() const;
// LLView functionality
virtual void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
virtual BOOL handleKeyHere(KEY key, MASK mask);
virtual BOOL handleUnicodeCharHere(llwchar uni_char);
virtual BOOL handleScrollWheel( S32 x, S32 y, S32 clicks );
virtual BOOL handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
EDragAndDropType cargo_type,
void* cargo_data,
EAcceptance* accept,
std::string& tooltip_msg);
virtual void draw();
virtual bool addChild(LLView* view, S32 tab_group = 0);
bool autoScroll(S32 x, S32 y);
S32 getSize() const { return mSize; }
void setSize(S32 thickness);
protected:
LLView* mScrolledView;
private:
// internal scrollbar handlers
virtual void scrollHorizontal( S32 new_pos );
virtual void scrollVertical( S32 new_pos );
void updateScroll();
void calcVisibleSize( S32 *visible_width, S32 *visible_height, BOOL* show_h_scrollbar, BOOL* show_v_scrollbar ) const;
LLScrollbar* mScrollbar[ORIENTATION_COUNT];
S32 mSize;
BOOL mIsOpaque;
LLUIColor mBackgroundColor;
LLRect mInnerRect;
LLViewBorder* mBorder;
BOOL mReserveScrollCorner;
BOOL mAutoScrolling;
F32 mAutoScrollRate;
F32 mMinAutoScrollRate;
F32 mMaxAutoScrollRate;
bool mHideScrollbar;
};
#endif // LL_LLSCROLLCONTAINER_H
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