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/* This file is part of the KDE project
Copyright (C) 2002 Matthias Hoelzer-Kluepfel <mhk@kde.org>
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 __KACCELMANAGER_PRIVATE_H__
#define __KACCELMANAGER_PRIVATE_H__
#include <qstring.h>
#include <qmemarray.h>
#include <qvaluelist.h>
#include <qobject.h>
class QWidgetStack;
/**
* A string class handling accelerators.
*
* This class contains a string and knowledge about accelerators.
* It keeps a list weights, telling how valuable each character
* would be as an accelerator.
*
* @author Matthias Hoelzer-Kluepfel <mhk@kde.org>
*/
class KAccelString
{
public:
KAccelString() : m_pureText(), m_accel(-1) {}
KAccelString(const QString &input, int initalWeight=-1);
void calculateWeights(int initialWeight);
const QString &pure() const { return m_pureText; }
QString accelerated() const;
int accel() const { return m_accel; }
void setAccel(int accel) { m_accel = accel; }
int originalAccel() const { return m_orig_accel; }
QString originalText() const { return m_origText; }
QChar accelerator() const;
int maxWeight(int &index, const QString &used);
bool operator == (const KAccelString &c) const { return m_pureText == c.m_pureText && m_accel == c.m_accel && m_orig_accel == c.m_orig_accel; }
private:
int stripAccelerator(QString &input);
void dump();
QString m_pureText, m_origText;
int m_accel, m_orig_accel;
QMemArray<int> m_weight;
};
typedef QValueList<KAccelString> KAccelStringList;
/**
* This class encapsulates the algorithm finding the 'best'
* distribution of accelerators in a hierarchy of widgets.
*
* @author Matthias Hoelzer-Kluepfel <mhk@kde.org>
*/
class KAccelManagerAlgorithm
{
public:
/// Constants used in the algorithm
enum {
/// Default control weight
DEFAULT_WEIGHT = 50,
/// Additional weight for first character in string
FIRST_CHARACTER_EXTRA_WEIGHT = 50,
/// Additional weight for the beginning of a word
WORD_BEGINNING_EXTRA_WEIGHT = 50,
/// Additional weight for the dialog buttons (large, we basically never want these reassigned)
DIALOG_BUTTON_EXTRA_WEIGHT = 300,
/// Additional weight for a 'wanted' accelerator
WANTED_ACCEL_EXTRA_WEIGHT = 150,
/// Default weight for an 'action' widget (ie, pushbuttons)
ACTION_ELEMENT_WEIGHT = 50,
/// Default weight for group boxes (low priority)
GROUP_BOX_WEIGHT = -2000,
/// Default weight for menu titles
MENU_TITLE_WEIGHT = 250,
/// Additional weight for KDE standard accelerators
STANDARD_ACCEL = 300
};
/// Method to call to find the best distribution of accelerators.
static void findAccelerators(KAccelStringList &result, QString &used);
};
class QPopupMenu;
/**
* This class manages a popup menu. It will notice if entries have been
* added or changed, and will recalculate the accelerators accordingly.
*
* This is necessary for dynamic menus like for example in kicker.
*
* @author Matthias Hoelzer-Kluepfel <mhk@kde.org>
*/
class KPopupAccelManager : public QObject
{
Q_OBJECT
public:
static void manage(QPopupMenu *popup);
protected:
KPopupAccelManager(QPopupMenu *popup);
private slots:
void aboutToShow();
private:
void calculateAccelerators();
void findMenuEntries(KAccelStringList &list);
void setMenuEntries(const KAccelStringList &list);
QPopupMenu *m_popup;
KAccelStringList m_entries;
int m_count;
};
class QWidgetStackAccelManager : public QObject
{
Q_OBJECT
public:
static void manage(QWidgetStack *popup);
protected:
QWidgetStackAccelManager(QWidgetStack *popup);
private slots:
void aboutToShow(QWidget *);
bool eventFilter ( QObject * watched, QEvent * e );
private:
void calculateAccelerators();
QWidgetStack *m_stack;
KAccelStringList m_entries;
};
#endif
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