/** * @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(value.asString()); // mDisplay and mValue agree mUpdateFromDisplay = false; } 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; 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; } LLSD LLTextViewModel::getValue() const { // Has anyone called setDisplay() since the last setValue()? If so, have // to convert mDisplay back to UTF8. if (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*>(this); nthis->mUpdateFromDisplay = false; nthis->mValue = wstring_to_utf8str(mDisplay); } return LLViewModel::getValue(); } //////////////////////////////////////////////////////////////////////////// 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) { }