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/* This file is part of the KDE libraries
Copyright (C) 1999 Daniel M. Duley <mosfet@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 version 2 as published by the Free Software Foundation.
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 __KDUALCOLORBTN_H
#define __KDUALCOLORBTN_H
class QBitmap;
#include <qbrush.h>
#include <qwidget.h>
#include <kdelibs_export.h>
/**
* @short A widget for selecting two related colors.
*
* KDualColorButton allows the user to select two cascaded colors (usually a
* foreground and background color). Other features include drag and drop
* from other KDE color widgets, a reset to black and white control, and a
* swap colors control.
*
* When the user clicks on the foreground or background rectangle the
* rectangle is first sunken and the currentChanged() signal is emitted.
* Further clicks will present a color dialog and emit either the fgChanged()
* or bgChanged() if a new color is selected.
*
* Note: With drag and drop when dropping a color the current selected color
* will be set, while when dragging a color it will use whatever color
* rectangle the mouse was pressed inside.
*
* \image html kdualcolorbutton.png "KDE Dual Color Button"
*
* @author Daniel M. Duley <mosfet@kde.org>
*/
class KDEUI_EXPORT KDualColorButton : public QWidget
{
Q_OBJECT
Q_ENUMS( DualColor )
Q_PROPERTY( QColor foreground READ foreground WRITE setForeground )
Q_PROPERTY( QColor background READ background WRITE setBackground )
Q_PROPERTY( QColor currentColor READ currentColor WRITE setCurrentColor STORED false DESIGNABLE false )
Q_PROPERTY( DualColor current READ current WRITE setCurrent )
public:
enum DualColor { Foreground, Background };
/**
* Constructs a new KDualColorButton using the default black and white
* colors.
*
* As of KDE 3.5.1, sets the dialog parent to the same as "parent" if that
* argument is non-null and the dialogParent argument is null.
*/
KDualColorButton(QWidget *parent=0, const char *name=0, QWidget* dialogParent=0);
/**
* Constructs a new KDualColorButton with the supplied foreground and
* background colors.
*/
KDualColorButton(const QColor &fgColor, const QColor &bgColor,
QWidget *parent=0, const char *name=0, QWidget* dialogParent=0);
~KDualColorButton();
/**
* Returns the current foreground color.
*/
QColor foreground() const;
/**
* Returns the current background color.
*/
QColor background() const;
/**
* Returns the current color item selected by the user.
*/
DualColor current() const;
/**
* Returns the color of the selected item.
*/
QColor currentColor() const;
/**
* Returns the minimum size needed to display the widget and all its
* controls.
*/
virtual QSize sizeHint() const;
public slots:
/**
* Sets the foreground color.
*/
void setForeground(const QColor &c);
/**
* Sets the background color.
*/
void setBackground(const QColor &c);
/**
* Sets the current selected color item.
*/
void setCurrent(DualColor s);
/**
* Sets the color of the selected item.
*/
void setCurrentColor(const QColor &c);
signals:
/**
* Emitted when the foreground color is changed.
*/
void fgChanged(const QColor &c);
/**
* Emitted when the background color is changed.
*/
void bgChanged(const QColor &c);
/**
* Emitted when the user changes the current color selection.
*/
void currentChanged(KDualColorButton::DualColor s);
protected:
/**
* Sets the supplied rectangles to the proper size and position for the
* current widget size. You can reimplement this to change the layout
* of the widget. Restrictions are that the swap control will always
* be at the top right, the reset control will always be at the bottom
* left, and you must leave at least a 14x14 space in those corners.
*/
virtual void metrics(QRect &fgRect, QRect &bgRect);
virtual void paintEvent(QPaintEvent *ev);
virtual void mousePressEvent(QMouseEvent *ev);
virtual void mouseMoveEvent(QMouseEvent *ev);
virtual void mouseReleaseEvent(QMouseEvent *ev);
// Dnd
virtual void dragEnterEvent(QDragEnterEvent *ev);
virtual void dropEvent(QDropEvent *ev);
private:
QBitmap *arrowBitmap;
QPixmap *resetPixmap;
QBrush fg, bg;
QPoint mPos;
bool dragFlag, miniCtlFlag;
DualColor curColor, tmpColor;
protected:
virtual void virtual_hook( int id, void* data );
private:
class KDualColorPrivate;
KDualColorPrivate *d;
};
#endif
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