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/**
* @file llviewmodel.cpp
* @author Nat Goodspeed
* @date 2008-08-08
* @brief Implementation for llviewmodel.
*
* $LicenseInfo:firstyear=2008&license=viewerlgpl$
* 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
* $/LicenseInfo$
*/
// Precompiled header
#include "linden_common.h"
// associated header
#include "llviewmodel.h"
// STL headers
// std headers
// external library headers
// other Linden headers
///
LLViewModel::LLViewModel()
: mDirty(false)
{
}
/// Instantiate an LLViewModel with an existing data value
LLViewModel::LLViewModel(const LLSD& value)
: mDirty(false)
{
setValue(value);
}
/// Update the stored value
void LLViewModel::setValue(const LLSD& value)
{
mValue = value;
mDirty = true;
}
LLSD LLViewModel::getValue() const
{
return mValue;
}
////////////////////////////////////////////////////////////////////////////
///
LLTextViewModel::LLTextViewModel()
: LLViewModel(false),
mUpdateFromDisplay(false)
{
}
/// Instantiate an LLViewModel with an existing data value
LLTextViewModel::LLTextViewModel(const LLSD& value)
: LLViewModel(value),
mUpdateFromDisplay(false)
{
}
/// Update the stored value
void LLTextViewModel::setValue(const LLSD& value)
{
// approximate LLSD storage usage
LLViewModel::setValue(value);
mDisplay = utf8str_to_wstring(mStringValue = value.asString());
mDisplayGeneration++;
// mDisplay and mValue agree
mUpdateFromDisplay = false;
}
LLWString& LLTextViewModel::getEditableDisplay()
{
mDirty = true;
mDisplayGeneration++;
mUpdateFromDisplay = true;
return mDisplay;
}
void LLTextViewModel::setDisplay(const LLWString& value)
{
// This is the strange way to alter the value. Normally we'd setValue()
// and do the utf8str_to_wstring() to get the corresponding mDisplay
// value. But a text editor might want to edit the display string
// directly, then convert back to UTF8 on commit.
mDisplay = value;
mDisplayGeneration++;
mDirty = true;
// Don't immediately convert to UTF8 -- do it lazily -- we expect many
// more setDisplay() calls than getValue() calls. Just flag that it needs
// doing.
mUpdateFromDisplay = true;
}
inline void updateFromDisplayIfNeeded(const LLTextViewModel* model)
{
// Has anyone called setDisplay() since the last setValue()?
// If so, have to convert mDisplay back to UTF8.
if (model->mUpdateFromDisplay)
{
// The fact that we're lazily updating fields
// in this object should be transparent to clients,
// which is why this method is left conventionally const.
// Nor do we particularly want to make these members mutable.
// Just cast away constness in this one place.
LLTextViewModel* nthis = const_cast<LLTextViewModel*>(model);
nthis->mUpdateFromDisplay = false;
nthis->mValue = nthis->mStringValue = wstring_to_utf8str(model->mDisplay);
}
}
LLSD LLTextViewModel::getValue() const
{
updateFromDisplayIfNeeded(this);
return mValue;
}
const std::string& LLTextViewModel::getStringValue() const
{
updateFromDisplayIfNeeded(this);
return mStringValue;
}
////////////////////////////////////////////////////////////////////////////
LLListViewModel::LLListViewModel(const LLSD& values)
: LLViewModel()
{
}
void LLListViewModel::addColumn(const LLSD& column, EAddPosition pos)
{
}
void LLListViewModel::clearColumns()
{
}
void LLListViewModel::setColumnLabel(const std::string& column, const std::string& label)
{
}
LLScrollListItem* LLListViewModel::addElement(const LLSD& value, EAddPosition pos,
void* userdata)
{
return NULL;
}
LLScrollListItem* LLListViewModel::addSimpleElement(const std::string& value, EAddPosition pos,
const LLSD& id)
{
return NULL;
}
void LLListViewModel::clearRows()
{
}
void LLListViewModel::sortByColumn(const std::string& name, bool ascending)
{
}
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