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/***************************************************************************
 *   Copyright (C) 2005 by Alexander Dymo                                  *
 *   adymo@kdevelop.org                                                    *
 *                                                                         *
 *   This program 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 program 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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this program; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.             *
 ***************************************************************************/
#include "dmainwindow.h"

#include <kdebug.h>
#include <tdeapplication.h>
#include <tdeconfig.h>
#include <kiconloader.h>

#include <tqtoolbutton.h>

#include "dtabwidget.h"
#include "docksplitter.h"

DMainWindow::DMainWindow(TQWidget *parent, const char *name)
    :KParts::MainWindow(parent, name), m_firstRemoved(false), m_currentWidget(0)
{
    loadSettings();
    createToolWindows();
    m_central = new Ideal::DockSplitter(TQt::Horizontal, this);
    m_activeTabWidget = createTab();
    m_central->addDock(0, 0, m_activeTabWidget);
    setCentralWidget(m_central);
}

void DMainWindow::loadSettings()
{
    TDEConfig *config = kapp->config();
    config->setGroup("UI");
    m_openTabAfterCurrent = config->readBoolEntry("OpenNewTabAfterCurrent", true);
    m_showIconsOnTabs = config->readBoolEntry("ShowTabIcons", false);
}

void DMainWindow::saveSettings()
{
    m_leftDock->saveSettings();
    m_rightDock->saveSettings();
    m_bottomDock->saveSettings();
}

DMainWindow::~DMainWindow()
{
/*    for (TQValueList<TQWidget*>::iterator it = m_widgets.begin(); it != m_widgets.end(); ++it)
        removeWidget(*it);*/
}

DDockWindow *DMainWindow::toolWindow(DDockWindow::Position position) const
{
    switch (position) {
        case DDockWindow::Bottom: return m_bottomDock;
        case DDockWindow::Left: return m_leftDock;
        case DDockWindow::Right: return m_rightDock;
    }
    return 0;
}

void DMainWindow::createToolWindows()
{
    m_bottomDock = new DDockWindow(this, DDockWindow::Bottom);
    moveDockWindow(m_bottomDock, TQt::DockBottom);
    m_leftDock = new DDockWindow(this, DDockWindow::Left);
    moveDockWindow(m_leftDock, TQt::DockLeft);
    m_rightDock = new DDockWindow(this, DDockWindow::Right);
    moveDockWindow(m_rightDock, TQt::DockRight);
}

void DMainWindow::addWidget(TQWidget *widget, const TQString &title)
{
//     invalidateActiveTabWidget();
    if (m_firstRemoved && m_activeTabWidget == m_tabs.first())
    {
        m_central->addDock(0, 0, m_activeTabWidget);
        m_firstRemoved = false;
    }

    addWidget(m_activeTabWidget, widget, title);
}

void DMainWindow::addWidget(DTabWidget *tab, TQWidget *widget, const TQString &title)
{
    static TQPixmap emptyPixmap;

    int idx = -1;
    if (m_openTabAfterCurrent && (tab->count() > 0))
        idx = tab->currentPageIndex() + 1;
    if (m_showIconsOnTabs)
    {
        const TQPixmap *pixmap = widget->icon();
        const TQIconSet &icons = (pixmap && (pixmap->size().height() <= 16)) ? *(pixmap) : SmallIcon("tdevelop");
        tab->insertTab(widget, icons, title, idx);
    }
    else
        tab->insertTab(widget, emptyPixmap, title, idx);
    m_widgets.append(widget);
    m_widgetTabs[widget] = tab;
    widget->installEventFilter(this);
    tab->showPage(widget);
}

void DMainWindow::removeWidget(TQWidget *widget)
{
    if (!m_widgets.contains(widget))
        return; //not a widget in main window

    if (m_widgetTabs.contains(widget))
    {
        DTabWidget *tab = m_widgetTabs[widget];
        if (tab->indexOf(widget) >= 0)
        {
            tab->removePage(widget);
            widget->reparent(0,TQPoint(0,0),false);
            if (tab->count() == 0)
            {
                if (tab->closeButton())
                    tab->closeButton()->hide();
                //remove and delete tabwidget if it is not the first one
                if (tab != m_tabs.first())
                {
                    TQPair<uint, uint> idx = m_central->indexOf(tab);
                    m_tabs.remove(tab);
                    m_activeTabWidget = m_tabs.first();
                    m_central->removeDock(idx.first, idx.second, true);
                }
                //only temporarily remove the first tabwidget
                else
                {
                    m_central->removeDock(0, 0, false);
                    m_firstRemoved = true;
                }
                //focus smth in m_activeTabWidget
                if (m_activeTabWidget)
                {
                    if (m_activeTabWidget->currentPage())
                    {
                        m_activeTabWidget->currentPage()->setFocus();
                    }
                }
            }
        }
    }

    m_widgets.remove(widget);
    m_widgetTabs.remove(widget);
    if (m_activeTabWidget && m_activeTabWidget->currentPage())
    {
        //a hack to please multibuffer and actually switch the active part
        TQFocusEvent ev(TQEvent::FocusIn);
        TQApplication::sendEvent(m_activeTabWidget->currentPage(), &ev);
    }
}

DTabWidget *DMainWindow::splitHorizontal()
{
    m_activeTabWidget = createTab();
    m_central->addDock(m_central->numRows(), 0, m_activeTabWidget);
    return m_activeTabWidget;
}

DTabWidget *DMainWindow::splitVertical()
{
//     invalidateActiveTabWidget();
    int row = m_central->indexOf(m_activeTabWidget).first;
    m_activeTabWidget = createTab();
    m_central->addDock(row, m_central->numCols(row), m_activeTabWidget);
    return m_activeTabWidget;
}

void DMainWindow::invalidateActiveTabWidget()
{
/*    TQWidget *focused = m_central->focusWidget();
    kdDebug(9000) << "invalidate: " << focused << endl;
    if (focused == 0)
        return;
    if (!m_widgets.contains(focused))
    {
        kdDebug(9000) << "    focused is not in m_widgets" << endl;
        return;
    }
    if (m_widgetTabs.contains(focused))
    {
        kdDebug(9000) << "    focused is in m_widgets and m_widgetTabs" << endl;
        DTabWidget *tab = m_widgetTabs[focused];
        if (tab->indexOf(focused) >= 0)
            m_activeTabWidget = tab;
        kdDebug(9000) << "    tab: " << tab << endl;
    }*/
}

DTabWidget *DMainWindow::createTab()
{
    DTabWidget *tab = new DTabWidget(m_central);
    m_tabs.append(tab);
    if (tab->closeButton())
        connect(tab->closeButton(), TQT_SIGNAL(clicked()), this, TQT_SLOT(closeTab()));
    connect(tab, TQT_SIGNAL(closeRequest(TQWidget*)), this, TQT_SLOT(closeTab(TQWidget*)));
    connect(tab, TQT_SIGNAL(contextMenu(TQWidget*,const TQPoint &)),
        this, TQT_SLOT(tabContext(TQWidget*,const TQPoint &)));
    return tab;
}

bool DMainWindow::eventFilter(TQObject *obj, TQEvent *ev)
{
    TQWidget *w = (TQWidget*)obj;
    if (!m_widgets.contains(w))
        return KParts::MainWindow::eventFilter(obj, ev);

    if ((m_currentWidget != w) && (ev->type() == TQEvent::FocusIn))
    {
        m_currentWidget = w;
        emit widgetChanged(w);
    }
    else if (ev->type() == TQEvent::IconChange)
    {
        if (m_widgetTabs.contains(w))
        {
            DTabWidget *tab = m_widgetTabs[w];
            tab->setTabIconSet(w, w->icon() ? (*(w->icon())) : TQPixmap());
        }
    }
    else if (ev->type() == TQEvent::CaptionChange)
    {
        kdDebug(9000) << "caption change" << endl;
        DTabWidget *tab = m_widgetTabs[w];
        tab->changeTab(w, w->caption());
    }

    return KParts::MainWindow::eventFilter(obj, ev);
}

void DMainWindow::closeTab()
{
    //nothing to do here, should be reimplemented
}

void DMainWindow::tabContext(TQWidget *, const TQPoint &)
{
    //nothing to do here, should be reimplemented
}

void DMainWindow::closeTab(TQWidget *)
{
    //nothing to do here, should be reimplemented
}

void DMainWindow::moveWidget(DDockWindow::Position position, TQWidget * view, const TQString & title)
{
    if (m_docks.contains(view))
    {
        toolWindow(m_docks[view])->removeWidget(view);

        toolWindow(position)->addWidget( title, view, true );
        m_docks[view] = position;
    }
}

void DMainWindow::addDockWidget(DDockWindow::Position position, TQWidget *view, const TQString &title)
{
    toolWindow(position)->addWidget(title, view);
    m_docks[view] = position;
    connect(view, TQT_SIGNAL(destroyed()), this, TQT_SLOT(widgetDestroyed()));
}

void DMainWindow::removeDockWidget(TQWidget *view)
{
    toolWindow(m_docks[view])->removeWidget(view);
    m_docks.remove(view);
}

bool DMainWindow::hasDockWidget(TQWidget *view)
{
    return m_docks.contains(view);
}

DDockWindow::Position DMainWindow::dockWidgetPosition(TQWidget *view)
{
    return m_docks[view];
}

void DMainWindow::widgetDestroyed()
{
    TQWidget *w = TQT_TQWIDGET(const_cast<TQObject*>(sender()));

    if (m_docks.contains(w))
    {
        kdError() << "Widget destroyed before being removed from UI!" << endl;
        m_docks.remove(w);
    }
}

#include "dmainwindow.moc"