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+/*
+ * This file is part of the KFTPGrabber project
+ *
+ * Copyright (C) 2003-2006 by the KFTPGrabber developers
+ * Copyright (C) 2003-2006 Jernej Kos <kostko@jweb-network.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * is provided AS IS, WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, and
+ * NON-INFRINGEMENT. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Steet, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ *
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL. If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so. If you
+ * do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+#ifndef KFTPWIDGETSWIDGETLISTER_H
+#define KFTPWIDGETSWIDGETLISTER_H
+
+#include <qwidget.h>
+#include <qptrlist.h>
+
+class QPushButton;
+class QVBoxLayout;
+class QHBox;
+
+namespace KFTPWidgets {
+
+/**
+ * This class has been adopted from KDEPIM with slight functional and style
+ * changes.
+ *
+ * @author Jernej Kos
+ * @author Marc Mutz <marc@mutz.com>
+ */
+class WidgetLister : public QWidget
+{
+Q_OBJECT
+public:
+ /**
+ * Class constructor.
+ *
+ * @param parent Parent widget
+ * @param minWidgets Minimum number of widgets in the list
+ * @param maxWidgets Maximum number of widgets in the list
+ */
+ WidgetLister(QWidget* parent, int minWidgets, int maxWidgets);
+
+ /**
+ * Class destructor.
+ */
+ virtual ~WidgetLister();
+
+ /**
+ * Clears all widgets.
+ */
+ void clear();
+
+ /**
+ * Sets the number of currently shown widgets on screen.
+ *
+ * @param number The number of widgets that should be visible
+ */
+ virtual void setNumberShown(int number);
+protected slots:
+ /**
+ * Called whenever the user clicks on the 'more' button. Reimplementations
+ * should call this method, because this implementation does all the dirty
+ * work with adding the widgets to the layout (through @ref addWidget)
+ * and enabling/disabling the control buttons.
+ */
+ virtual void slotMore();
+
+ /**
+ * Called whenever the user clicks on the 'fewer' button. Reimplementations
+ * should call this method, because this implementation does all the dirty
+ * work with removing the widgets from the layout (through @ref removeWidget)
+ * and enabling/disabling the control buttons.
+ */
+ virtual void slotFewer();
+
+ /**
+ * Called whenever the user clicks on the 'clear' button. Reimplementations
+ * should call this method, because this implementation does all the dirty
+ * work with removing all but @ref m_minWidgets widgets from the layout and
+ * enabling/disabling the control buttons.
+ */
+ virtual void slotClear();
+protected:
+ /**
+ * Adds a single widget. Doesn't care if there are already @ref m_maxWidgets
+ * on screen and whether it should enable/disable any controls. It simply does
+ * what it is asked to do. You want to reimplement this method if you want to
+ * initialize the the widget when showing it on screen. Make sure you call this
+ * implementaion, though, since you cannot put the widget on screen from derived
+ * classes (@p m_layout is private). Make sure the parent of the QWidget to add is
+ * this WidgetLister.
+ *
+ * @param widget The widget that should be added
+ */
+ virtual void addWidget(QWidget *widget = 0);
+
+ /**
+ * Removes a single (always the last) widget. Doesn't care if there are still only
+ * @ref m_minWidgets left on screen and whether it should enable/disable any controls.
+ * It simply does what it is asked to do. You want to reimplement this method if you
+ * want to save the the widget's state before removing it from screen. Make sure you
+ * call this implementaion, though, since you should not remove the widget from
+ * screen from derived classes.
+ */
+ virtual void removeWidget();
+
+ /**
+ * Called to clear a given widget. The default implementation does nothing.
+ *
+ * @param widget The widget that should be cleared
+ */
+ virtual void clearWidget(QWidget *widget);
+
+ /**
+ * This method should return a new widget to add to the widget list.
+ *
+ * @param parent The parent widget
+ * @return A valid QWidget
+ */
+ virtual QWidget *createWidget(QWidget *parent);
+protected:
+ QPtrList<QWidget> m_widgetList;
+ int m_minWidgets;
+ int m_maxWidgets;
+signals:
+ /**
+ * This signal is emitted whenever a widget gets added.
+ */
+ void widgetAdded(QWidget *widget);
+
+ /**
+ * This signal is emitted whenever a widget gets removed.
+ */
+ void widgetRemoved();
+
+ /**
+ * This signal is emitted whenever the clear button is clicked.
+ */
+ void clearWidgets();
+private:
+ void enableControls();
+
+ QPushButton *m_buttonMore;
+ QPushButton *m_buttonFewer;
+ QPushButton *m_buttonClear;
+ QVBoxLayout *m_layout;
+ QHBox *m_buttonBox;
+};
+
+}
+
+#endif