cjanuswidget.cpp

/*
 *  This file is part of the KDE libraries
 *  Copyright (c) 2001 Michael Goffioul <tdeprint@swing.be>
 *
 *  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.
 **/
 
#include "cjanuswidget.h"
 
#include <tqwidgetstack.h>
#include <tqlabel.h>
#include <tqpainter.h>
#include <tdelistbox.h>
#include <tqlayout.h>
#include <kseparator.h>
 
class CJanusWidget::CPage
{
public:
    TQWidget    *m_widget;
    TQString    m_text;
    TQString    m_header;
    TQPixmap    m_pixmap;
    CListBoxItem    *m_item;
};
 
//***********************************************************************************
 
class CJanusWidget::CListBoxItem : public TQListBoxItem
{
public:
    CListBoxItem(TQListBox *lb, TQListBoxItem *after, const TQPixmap& pix, const TQString& text);
    int height(const TQListBox*) const;
    int width(const TQListBox*) const;
 
protected:
    void paint(TQPainter*);
 
private:
    TQPixmap    m_pix;
};
 
CJanusWidget::CListBoxItem::CListBoxItem(TQListBox *lb, TQListBoxItem *after, const TQPixmap& pix, const TQString& text)
: TQListBoxItem(lb, after), m_pix(pix)
{
    setText(text);
}
 
int CJanusWidget::CListBoxItem::height(const TQListBox *lb) const
{
    return (m_pix.height() + lb->fontMetrics().lineSpacing() + 12);
}
 
int CJanusWidget::CListBoxItem::width(const TQListBox *lb) const
{
    int w = TQMAX(lb->fontMetrics().width(text()),m_pix.width());
    return (w + 10);
}
 
void CJanusWidget::CListBoxItem::paint(TQPainter *p)
{
    int w1 = (listBox()->contentsWidth()-m_pix.width())/2;
 
    p->drawPixmap(w1,5,m_pix);
    p->drawText(0,7+m_pix.height(),listBox()->contentsWidth(),p->fontMetrics().lineSpacing(),TQt::AlignHCenter,text());
}
 
//***********************************************************************************
 
class CJanusWidget::CListBox : public TDEListBox
{
public:
    CListBox(TQWidget *parent = 0, const char *name = 0);
    ~CListBox();
 
    void computeWidth();
 
protected:
    virtual bool eventFilter(TQObject*, TQEvent*);
};
 
CJanusWidget::CListBox::CListBox(TQWidget *parent, const char *name)
: TDEListBox(parent,name)
{
    verticalScrollBar()->installEventFilter(this);
}
 
CJanusWidget::CListBox::~CListBox()
{
}
 
bool CJanusWidget::CListBox::eventFilter(TQObject *o, TQEvent *e)
{
    if (e->type() == TQEvent::Show || e->type() == TQEvent::Hide)
        computeWidth();
    return TDEListBox::eventFilter(o,e);
}
 
void CJanusWidget::CListBox::computeWidth()
{
    TQListBoxItem   *item = firstItem();
    int w(40);
    while (item)
    {
        w = TQMAX(w,item->width(this));
        item = item->next();
    }
    if (verticalScrollBar()->isVisible())
        w += verticalScrollBar()->sizeHint().width();
    w += (frameWidth()*2);
    setFixedWidth(w);
}
 
//***********************************************************************************
 
CJanusWidget::CJanusWidget(TQWidget *parent, const char *name)
: TQWidget(parent,name)
{
    m_pages.setAutoDelete(true);
 
    m_stack = new TQWidgetStack(this);
    m_header = new TQLabel(this);
    TQFont  f(m_header->font());
    f.setBold(true);
    m_header->setFont(f);
 
    KSeparator* sep = new KSeparator( KSeparator::HLine, this);
    sep->setFixedHeight(5);
 
    m_iconlist = new CListBox(this);
    f = m_iconlist->font();
    f.setBold(true);
    m_iconlist->setFont(f);
    connect(m_iconlist,TQ_SIGNAL(selectionChanged(TQListBoxItem*)),TQ_SLOT(slotSelected(TQListBoxItem*)));
 
    m_empty = new TQWidget(this, "Empty");
    m_stack->addWidget(m_empty,0);
 
    TQHBoxLayout    *main_ = new TQHBoxLayout(this, 0, 10);
    TQVBoxLayout    *sub_ = new TQVBoxLayout(0, 0, 5);
    main_->addWidget(m_iconlist,0);
    main_->addLayout(sub_,1);
    sub_->addWidget(m_header,0);
    sub_->addWidget(sep,0);
    sub_->addWidget(m_stack,1);
}
 
CJanusWidget::~CJanusWidget()
{
}
 
void CJanusWidget::addPage(TQWidget *w, const TQString& text, const TQString& header, const TQPixmap& pix)
{
    CPage   *page = new CPage();
    m_pages.append(page);
    page->m_widget = w;
    page->m_text = text;
    page->m_header = header;
    page->m_pixmap = pix;
    page->m_item = new CListBoxItem(m_iconlist,findPrevItem(page),pix,text);
    m_iconlist->computeWidth();
    m_stack->addWidget(w,m_pages.count());
 
    if (m_iconlist->count() == 1)
        m_iconlist->setSelected(page->m_item,true);
}
 
void CJanusWidget::enablePage(TQWidget *w)
{
    CPage   *page = findPage(w);
    if (page && !page->m_item)
    {
        page->m_item = new CListBoxItem(m_iconlist,findPrevItem(page),page->m_pixmap,page->m_text);
        m_iconlist->computeWidth();
        if (m_iconlist->count() == 1)
            m_iconlist->setSelected(page->m_item,true);
    }
}
 
void CJanusWidget::disablePage(TQWidget *w)
{
    CPage   *page = findPage(w);
    if (page && page->m_item)
    {
        bool    needReselect(m_iconlist->isSelected(page->m_item));
        delete page->m_item;
        page->m_item = 0;
        m_iconlist->computeWidth();
        if (needReselect)
            if (m_iconlist->count() > 0)
                m_iconlist->setSelected(m_iconlist->firstItem(),true);
            else
                slotSelected(0);
    }
}
 
void CJanusWidget::slotSelected(TQListBoxItem *item)
{
    CPage   *page = findPage(item);
    if (page)
    {
        m_stack->raiseWidget(page->m_widget);
        m_header->setText(page->m_header);
    }
    else
    {
        m_header->setText("");
        m_stack->raiseWidget(m_empty);
    }
}
 
CJanusWidget::CPage* CJanusWidget::findPage(TQWidget *w)
{
    TQPtrListIterator<CPage>    it(m_pages);
    for (;it.current();++it)
        if (it.current()->m_widget == w)
            return it.current();
    return 0;
}
 
CJanusWidget::CPage* CJanusWidget::findPage(TQListBoxItem *i)
{
    TQPtrListIterator<CPage>    it(m_pages);
    for (;it.current();++it)
        if (it.current()->m_item == i)
            return it.current();
    return 0;
}
 
TQListBoxItem* CJanusWidget::findPrevItem(CPage *p)
{
    if (m_pages.findRef(p) == -1)
        m_pages.last();
    else
        m_pages.prev();
    for (;m_pages.current();m_pages.prev())
        if (m_pages.current()->m_item)
            return m_pages.current()->m_item;
    return 0;
}
 
void CJanusWidget::clearPages()
{
    TQPtrListIterator<CPage>    it(m_pages);
    for (;it.current(); ++it)
    {
        delete it.current()->m_widget;
        delete it.current()->m_item;
    }
    m_pages.clear();
}
 
#include "cjanuswidget.moc"