You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
274 lines
8.3 KiB
274 lines
8.3 KiB
/* This file is part of the KDE project
|
|
Copyright (C) 2001 Andrea Rizzi <rizzi@kde.org>
|
|
Ulrich Kuettler <ulrich.kuettler@mailbox.tu-dresden.de>
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2 of the License, or (at your option) any later version.
|
|
|
|
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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public License
|
|
along with this library; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef ROOTELEMENT_H
|
|
#define ROOTELEMENT_H
|
|
|
|
#include <tqpoint.h>
|
|
|
|
#include "basicelement.h"
|
|
|
|
KFORMULA_NAMESPACE_BEGIN
|
|
class SequenceElement;
|
|
|
|
|
|
/**
|
|
* A nice graphical root.
|
|
*/
|
|
class RootElement : public BasicElement {
|
|
RootElement& operator=( const RootElement& ) { return *this; }
|
|
public:
|
|
|
|
//enum { contentPos, indexPos };
|
|
|
|
RootElement(BasicElement* parent = 0);
|
|
~RootElement();
|
|
|
|
RootElement( const RootElement& );
|
|
|
|
virtual RootElement* clone() {
|
|
return new RootElement( *this );
|
|
}
|
|
|
|
virtual bool accept( ElementVisitor* visitor );
|
|
|
|
/**
|
|
* The cursor has entered one of our child sequences.
|
|
* This is a good point to tell the user where he is.
|
|
*/
|
|
virtual void entered( SequenceElement* child );
|
|
|
|
/**
|
|
* Sets the cursor and returns the element the point is in.
|
|
* The handled flag shows whether the cursor has been set.
|
|
* This is needed because only the innermost matching element
|
|
* is allowed to set the cursor.
|
|
*/
|
|
virtual BasicElement* goToPos( FormulaCursor*, bool& handled,
|
|
const LuPixelPoint& point, const LuPixelPoint& parentOrigin );
|
|
|
|
/**
|
|
* Calculates our width and height and
|
|
* our children's parentPosition.
|
|
*/
|
|
virtual void calcSizes( const ContextStyle& cstyle,
|
|
ContextStyle::TextStyle tstyle,
|
|
ContextStyle::IndexStyle istyle,
|
|
StyleAttributes& style );
|
|
|
|
/**
|
|
* Draws the whole element including its children.
|
|
* The `parentOrigin' is the point this element's parent starts.
|
|
* We can use our parentPosition to get our own origin then.
|
|
*/
|
|
virtual void draw( TQPainter& painter, const LuPixelRect& r,
|
|
const ContextStyle& cstyle,
|
|
ContextStyle::TextStyle tstyle,
|
|
ContextStyle::IndexStyle istyle,
|
|
StyleAttributes& style,
|
|
const LuPixelPoint& parentOrigin );
|
|
|
|
/**
|
|
* Dispatch this FontCommand to all our TextElement children.
|
|
*/
|
|
virtual void dispatchFontCommand( FontCommand* cmd );
|
|
|
|
/**
|
|
* Enters this element while moving to the left starting inside
|
|
* the element `from'. Searches for a cursor position inside
|
|
* this element or to the left of it.
|
|
*/
|
|
virtual void moveLeft(FormulaCursor* cursor, BasicElement* from);
|
|
|
|
/**
|
|
* Enters this element while moving to the right starting inside
|
|
* the element `from'. Searches for a cursor position inside
|
|
* this element or to the right of it.
|
|
*/
|
|
virtual void moveRight(FormulaCursor* cursor, BasicElement* from);
|
|
|
|
/**
|
|
* Enters this element while moving up starting inside
|
|
* the element `from'. Searches for a cursor position inside
|
|
* this element or above it.
|
|
*/
|
|
virtual void moveUp(FormulaCursor* cursor, BasicElement* from);
|
|
|
|
/**
|
|
* Enters this element while moving down starting inside
|
|
* the element `from'. Searches for a cursor position inside
|
|
* this element or below it.
|
|
*/
|
|
virtual void moveDown(FormulaCursor* cursor, BasicElement* from);
|
|
|
|
/**
|
|
* Reinserts the index if it has been removed.
|
|
*/
|
|
virtual void insert(FormulaCursor*, TQPtrList<BasicElement>&, Direction);
|
|
|
|
/**
|
|
* Removes all selected children and returns them. Places the
|
|
* cursor to where the children have been.
|
|
*
|
|
* We remove ourselve if we are requested to remove our content.
|
|
*/
|
|
virtual void remove(FormulaCursor*, TQPtrList<BasicElement>&, Direction);
|
|
|
|
/**
|
|
* Moves the cursor to a normal place where new elements
|
|
* might be inserted.
|
|
*/
|
|
virtual void normalize(FormulaCursor*, Direction);
|
|
|
|
// main child
|
|
//
|
|
// If an element has children one has to become the main one.
|
|
|
|
virtual SequenceElement* getMainChild();
|
|
SequenceElement* getRadiant() { return index; }
|
|
//virtual void setMainChild(SequenceElement*);
|
|
|
|
/**
|
|
* Sets the cursor to select the child. The mark is placed before,
|
|
* the position behind it.
|
|
*/
|
|
virtual void selectChild(FormulaCursor* cursor, BasicElement* child);
|
|
|
|
/**
|
|
* Moves the cursor away from the given child. The cursor is
|
|
* guaranteed to be inside this element.
|
|
*/
|
|
//virtual void childWillVanish(FormulaCursor* cursor, BasicElement* child) = 0;
|
|
|
|
// Moves the cursor inside the index. The index has to exist.
|
|
void moveToIndex(FormulaCursor*, Direction);
|
|
|
|
// Sets the cursor to point to the place where the index normaly
|
|
// is. These functions are only used if there is no such index and
|
|
// we want to insert them.
|
|
void setToIndex(FormulaCursor*);
|
|
|
|
bool hasIndex() const { return index != 0; }
|
|
|
|
ElementIndexPtr getIndex() { return ElementIndexPtr( new RootElementIndex( this ) ); }
|
|
|
|
// Save&load
|
|
//virtual TQDomElement getElementDom(TQDomDocument *doc);
|
|
//virtual bool buildFromDom(TQDomElement *elem);
|
|
|
|
/**
|
|
* @returns the latex representation of the element and
|
|
* of the element's children
|
|
*/
|
|
virtual TQString toLatex();
|
|
|
|
virtual TQString formulaString();
|
|
|
|
protected:
|
|
|
|
//Save/load support
|
|
|
|
/**
|
|
* Returns the tag name of this element type.
|
|
*/
|
|
virtual TQString getTagName() const { return "ROOT"; }
|
|
|
|
/**
|
|
* Appends our attributes to the dom element.
|
|
*/
|
|
virtual void writeDom(TQDomElement element);
|
|
|
|
/**
|
|
* Reads our attributes from the element.
|
|
* Returns false if it failed.
|
|
*/
|
|
virtual bool readAttributesFromDom(TQDomElement element);
|
|
|
|
/**
|
|
* Reads our content from the node. Sets the node to the next node
|
|
* that needs to be read.
|
|
* Returns false if it failed.
|
|
*/
|
|
virtual bool readContentFromDom(TQDomNode& node);
|
|
|
|
/**
|
|
* Reads our attributes from the MathML element.
|
|
* Also checks whether it's a msqrt or mroot.
|
|
* Returns false if it failed.
|
|
*/
|
|
virtual bool readAttributesFromMathMLDom(const TQDomElement& element);
|
|
|
|
/**
|
|
* Reads our content from the MathML node. Sets the node to the next node
|
|
* that needs to be read.
|
|
* Returns false if it failed.
|
|
*/
|
|
virtual int readContentFromMathMLDom(TQDomNode& node);
|
|
|
|
private:
|
|
|
|
virtual TQString getElementName() const { return hasIndex() ? "mroot" : "msqrt"; }
|
|
virtual void writeMathMLContent( TQDomDocument& doc,
|
|
TQDomElement& element,
|
|
bool oasisFormat ) const ;
|
|
|
|
class RootElementIndex : public ElementIndex {
|
|
public:
|
|
RootElementIndex(RootElement* p) : parent(p) {}
|
|
virtual void moveToIndex(FormulaCursor* cursor, Direction direction)
|
|
{ parent->moveToIndex(cursor, direction); }
|
|
virtual void setToIndex(FormulaCursor* cursor)
|
|
{ parent->setToIndex(cursor); }
|
|
virtual bool hasIndex() const
|
|
{ return parent->hasIndex(); }
|
|
virtual RootElement* getElement() { return parent; }
|
|
protected:
|
|
RootElement* parent;
|
|
};
|
|
|
|
|
|
/**
|
|
* The one below the graph.
|
|
*/
|
|
SequenceElement* content;
|
|
|
|
/**
|
|
* An optional index.
|
|
*/
|
|
SequenceElement* index;
|
|
|
|
/**
|
|
* The point the artwork relates to.
|
|
*/
|
|
LuPixelPoint rootOffset;
|
|
|
|
/**
|
|
* Whether it is msqrt or mroot element. It is only used while reading
|
|
* from MathML. When reading element contents we must know which of them
|
|
* it is. After reading, hasIndex() should be used instead.
|
|
*/
|
|
bool square;
|
|
};
|
|
|
|
|
|
KFORMULA_NAMESPACE_END
|
|
|
|
#endif // ROOTELEMENT_H
|