forked from openkylin/kolourpaint
91 lines
2.8 KiB
C
91 lines
2.8 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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#ifndef kpCommand_H
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#define kpCommand_H
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#include "kpCommandSize.h"
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#undef environ // macro on win32
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class QString;
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class kpAbstractImageSelection;
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class kpAbstractSelection;
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class kpCommandEnvironment;
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class kpDocument;
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class kpTextSelection;
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class kpViewManager;
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class kpCommand : public kpCommandSize
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{
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public:
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kpCommand (kpCommandEnvironment *environ);
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virtual ~kpCommand ();
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public:
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virtual QString name () const = 0;
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// Returns the estimated size in bytes.
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//
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// You only have to factor in the size of variables that change according
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// to the amount of input e.g. pixmap size, text size. There is no need
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// to include the size of O(1) variables unless they are huge.
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//
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// If in doubt, return the largest possible amount of memory that your
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// command will take. This is better than making the user unexpectedly
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// run out of memory.
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//
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// Implement this by measuring the size of all of your fields, using
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// kpCommandSize.
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virtual SizeType size () const = 0;
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virtual void execute () = 0;
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virtual void unexecute () = 0;
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protected:
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kpCommandEnvironment *environ () const;
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// Commonly used accessors - simply forwards to environ().
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kpDocument *document () const;
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kpAbstractSelection *selection () const;
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kpAbstractImageSelection *imageSelection () const;
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kpTextSelection *textSelection () const;
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kpViewManager *viewManager () const;
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private:
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kpCommandEnvironment * const m_environ;
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};
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#endif // kpCommand_H
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