Matthew Wilber
7598450e4f
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5693 a95241bf-73f2-0310-859d-f6bbb57e9c96
99 lines
2.6 KiB
C++
99 lines
2.6 KiB
C++
/*****************************************************************************/
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// ShowImageUndo
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// Written by Michael Wilber
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//
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// ShowImageUndo.cpp
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//
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//
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// Copyright (c) 2003 OpenBeOS Project
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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/*****************************************************************************/
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#include "ShowImageUndo.h"
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ShowImageUndo::ShowImageUndo()
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{
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fWindow = NULL;
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fUndoType = 0;
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fRestore = NULL;
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fSelection = NULL;
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}
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ShowImageUndo::~ShowImageUndo()
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{
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InternalClear();
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}
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void
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ShowImageUndo::InternalClear()
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{
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fUndoType = 0;
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delete fRestore;
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fRestore = NULL;
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delete fSelection;
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fSelection = NULL;
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}
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void
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ShowImageUndo::Clear()
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{
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InternalClear();
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SendUndoStateMessage(false);
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}
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void
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ShowImageUndo::SendUndoStateMessage(bool bCanUndo)
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{
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if (fWindow) {
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BMessage msg(MSG_UNDO_STATE);
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msg.AddBool("can_undo", bCanUndo);
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BMessenger msgr(fWindow);
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msgr.SendMessage(&msg);
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}
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}
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void
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ShowImageUndo::SetTo(BRect rect, BBitmap *restore, BBitmap *selection)
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{
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// NOTE: THIS FUNCTION DOES NOT MAKE COPIES OF THE BITMAPS PASSED TO IT
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InternalClear();
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fUndoType = UNDO_UNDO;
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fRect = rect;
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fRestore = restore;
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fSelection = selection;
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SendUndoStateMessage(true);
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}
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void
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ShowImageUndo::Undo(BRect rect, BBitmap *restore, BBitmap *selection)
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{
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// NOTE: THIS FUNCTION DOES NOT MAKE COPIES OF THE BITMAPS PASSED TO IT
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fUndoType = UNDO_REDO;
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fRect = rect;
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delete fRestore;
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fRestore = restore;
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fSelection = selection;
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// NOTE: fSelection isn't deleted here because ShowImageView
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// takes ownership of it during an Undo
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}
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