forked from openkylin/kolourpaint
132 lines
3.8 KiB
C++
132 lines
3.8 KiB
C++
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/*
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Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define DEBUG_KP_COMMAND_HISTORY 0
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#include "kpCommandHistory.h"
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#include "layers/selections/kpAbstractSelection.h"
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#include "mainWindow/kpMainWindow.h"
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#include "tools/kpTool.h"
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#include "commands/tools/selection/kpToolSelectionCreateCommand.h"
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kpCommandHistory::kpCommandHistory (bool doReadConfig, kpMainWindow *mainWindow)
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: kpCommandHistoryBase (doReadConfig, mainWindow->actionCollection ()),
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m_mainWindow (mainWindow)
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{
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}
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kpCommandHistory::~kpCommandHistory () = default;
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static bool NextUndoCommandIsCreateBorder (kpCommandHistory *commandHistory)
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{
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Q_ASSERT (commandHistory);
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kpCommand *cmd = commandHistory->nextUndoCommand ();
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if (!cmd) {
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return false;
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}
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auto *c = dynamic_cast <kpToolSelectionCreateCommand *> (cmd);
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if (!c) {
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return false;
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}
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const kpAbstractSelection *sel = c->fromSelection ();
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Q_ASSERT (sel);
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return (!sel->hasContent ());
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}
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// public
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void kpCommandHistory::addCreateSelectionCommand (kpToolSelectionCreateCommand *cmd,
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bool execute)
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{
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if (cmd->fromSelection ()->hasContent ())
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{
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addCommand (cmd, execute);
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return;
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}
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if (::NextUndoCommandIsCreateBorder (this))
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{
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setNextUndoCommand (cmd);
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if (execute) {
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cmd->execute ();
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}
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}
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else {
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addCommand (cmd, execute);
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}
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}
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//---------------------------------------------------------------------
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// public slot virtual [base KCommandHistory]
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void kpCommandHistory::undo ()
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{
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#if DEBUG_KP_COMMAND_HISTORY
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qCDebug(kpLogCommands) << "kpCommandHistory::undo() CALLED!";
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#endif
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if (m_mainWindow && m_mainWindow->toolHasBegunShape ())
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{
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#if DEBUG_KP_COMMAND_HISTORY
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qCDebug(kpLogCommands) << "\thas begun shape - cancel draw";
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#endif
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m_mainWindow->tool ()->cancelShapeInternal ();
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}
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else {
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kpCommandHistoryBase::undo ();
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}
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}
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//---------------------------------------------------------------------
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// public slot virtual [base KCommandHistory]
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void kpCommandHistory::redo ()
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{
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if (m_mainWindow && m_mainWindow->toolHasBegunShape ())
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{
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// Not completely obvious but what else can we do?
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//
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// Ignoring the request would not be intuitive for tools like
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// Polygon & Polyline (where it's not always apparent to the user
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// that s/he's still drawing a shape even though the mouse isn't
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// down).
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m_mainWindow->tool ()->cancelShapeInternal ();
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}
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else {
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kpCommandHistoryBase::redo ();
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}
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}
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