container.cpp

/* This file is part of the KDE project
   Copyright (C) 2003 Lucijan Busch <lucijan@gmx.at>
   Copyright (C) 2004 Cedric Pasteur <cedric.pasteur@free.fr>
 
   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.
*/
 
#include <tqpainter.h>
#include <tqpixmap.h>
#include <tqrect.h>
#include <tqevent.h>
#include <tqvaluevector.h>
#include <tqlayout.h>
#include <tqcursor.h>
 
#include <kdebug.h>
#include <tdelocale.h>
#include <tdepopupmenu.h>
 
#include <cstdlib> // for abs()
 
#include "utils.h"
#include "container.h"
#include "widgetlibrary.h"
#include "objecttree.h"
#include "form.h"
#include "formmanager.h"
#include "commands.h"
#include "events.h"
#include "kexiflowlayout.h"
 
using namespace KFormDesigner;
 
EventEater::EventEater(TQWidget *widget, TQObject *container)
 : TQObject(container)
{
    m_widget = widget;
    m_container = container;
 
    installRecursiveEventFilter(m_widget, this);
}
 
bool
EventEater::eventFilter(TQObject *, TQEvent *ev)
{
    if(!m_container)
        return false;
 
    // When the user click the empty part of tab bar, only MouseReleaseEvent is sent,
    // we need to simulate the Press event
    if(ev->type() == TQEvent::MouseButtonRelease && m_widget->inherits("TQTabWidget"))
    {
        TQMouseEvent *mev = static_cast<TQMouseEvent*>(ev);
        if(mev->button() == TQt::LeftButton)
        {
            TQMouseEvent *myev = new TQMouseEvent(TQEvent::MouseButtonPress, mev->pos(), mev->button(), mev->state());
            m_container->eventFilter(m_widget, myev);
            delete myev;
            //return true;
        }
    }
//  else if(ev->type() == TQEvent::ChildInserted) {
        // widget's children have changed, we need to reinstall filter
//      installRecursiveEventFilter(m_widget, this);
//  }
 
    return m_container->eventFilter(m_widget, ev);
}
 
EventEater::~EventEater()
{
    if(m_widget)
        removeRecursiveEventFilter(m_widget, this);
}
 
// Container itself
 
Container::Container(Container *toplevel, TQWidget *container, TQObject *parent, const char *name)
: TQObject(parent, name)
, m_insertBegin(-1,-1)
, m_mousePressEventReceived(false)
, m_mouseReleaseEvent(TQEvent::None, TQPoint(), 0, 0)
{
    m_container = container;
    m_toplevel = toplevel;
 
    m_moving = 0;
    m_tree = 0;
    m_form = toplevel ? toplevel->form() : 0;
    m_layout = 0;
    m_layType = NoLayout;
    m_state = DoingNothing;
 
    TQCString classname = container->className();
    if((classname == "HBox") || (classname == "Grid") || (classname == "VBox") ||
        (classname == "HFlow")  || (classname == "VFlow"))
        m_margin = 4; // those containers don't have frames, so little margin
    else
        m_margin = m_form ? m_form->defaultMargin() : 0;
    m_spacing = m_form ? m_form->defaultSpacing() : 0;
 
    if(toplevel)
    {
        ObjectTreeItem *it = new ObjectTreeItem(m_form->library()->displayName(classname),
            widget()->name(), widget(), this, this);
        setObjectTree(it);
 
        if(parent->isWidgetType())
        {
            TQString n = parent->name();
            ObjectTreeItem *parent = m_form->objectTree()->lookup(n);
            m_form->objectTree()->addItem(parent, it);
        }
        else
            m_form->objectTree()->addItem(toplevel->objectTree(), it);
 
        connect(toplevel, TQ_SIGNAL(destroyed()), this, TQ_SLOT(widgetDeleted()));
    }
 
    connect(container, TQ_SIGNAL(destroyed()), this, TQ_SLOT(widgetDeleted()));
}
 
Container::~Container()
{
    kdDebug() << " Container being deleted this == " << name() << endl;
}
 
void
Container::setForm(Form *form)
{
    m_form = form;
    m_margin = m_form ? m_form->defaultMargin() : 0;
    m_spacing = m_form ? m_form->defaultSpacing() : 0;
}
 
bool
Container::eventFilter(TQObject *s, TQEvent *e)
{
//  kdDebug() << e->type() << endl;
    switch(e->type())
    {
        case TQEvent::MouseButtonPress:
        {
            m_insertBegin = TQPoint(-1, -1);
            m_mousePressEventReceived = true;
 
            kdDebug() << "TQEvent::MouseButtonPress sender object = " << s->name()
                << "of type " << s->className() << endl;
            kdDebug() << "TQEvent::MouseButtonPress this          = " << name() << endl;
 
            m_moving = static_cast<TQWidget*>(s);
            TQMouseEvent *mev = static_cast<TQMouseEvent*>(e);
            m_grab = TQPoint(mev->x(), mev->y());
 
            // we are drawing a connection
            if(FormManager::self()->isCreatingConnection())  {
                drawConnection(mev);
                return true;
            }
 
            if(((mev->state() == TQt::ControlButton) || (mev->state() == TQt::ShiftButton))
                && (!FormManager::self()->isInserting())) // multiple selection mode
            {
                if(m_form->selectedWidgets()->findRef(m_moving) != -1) // widget is already selected
                {
                    if(m_form->selectedWidgets()->count() > 1) // we remove it from selection
                        unSelectWidget(m_moving);
                    else // the widget is the only selected, so it means we want to copy it
                    {
                        //m_copyRect = m_moving->geometry();
                        m_state = CopyingWidget;
                        if(m_form->formWidget())
                            m_form->formWidget()->initBuffer();
                    }
                }
                else // the widget is not yet selected, we add it
                    setSelectedWidget(m_moving, true, (mev->button() == TQt::RightButton));
            }
            else if((m_form->selectedWidgets()->count() > 1))//&& (!m_form->manager()->isInserting())) // more than one widget selected
            {
                if(m_form->selectedWidgets()->findRef(m_moving) == -1) // widget is not selected, it becomes the only selected widget
                    setSelectedWidget(m_moving, false, (mev->button() == TQt::RightButton));
                // If the widget is already selected, we do nothing (to ease widget moving, etc.)
            }
            else// if(!m_form->manager()->isInserting())
                setSelectedWidget(m_moving, false, (mev->button() == TQt::RightButton));
 
            // we are inserting a widget or drawing a selection rect in the form
            if((/*s == m_container &&*/ FormManager::self()->isInserting()) || ((s == m_container) && !m_toplevel))
            {
                int tmpx,tmpy;
                if(!FormManager::self()->snapWidgetsToGrid() || (mev->state() == (TQt::LeftButton|TQt::ControlButton|TQt::AltButton)))
                {
                    tmpx = mev->x();
                    tmpy = mev->y();
                }
                else
                {
                    int gridX = m_form->gridSize();
                    int gridY = m_form->gridSize();
                    tmpx = int( (float)mev->x() / ((float)gridX) + 0.5 ); // snap to grid
                    tmpx *= gridX;
                    tmpy = int( (float)mev->y() / ((float)gridY) + 0.5 );
                    tmpy *= gridX;
                }
 
                m_insertBegin = (static_cast<TQWidget*>(s))->mapTo(m_container, TQPoint(tmpx, tmpy));
                if(m_form->formWidget())
                    m_form->formWidget()->initBuffer();
 
                if(!FormManager::self()->isInserting())
                    m_state = DrawingSelectionRect;
            }
            else {
                if(s->inherits("TQTabWidget")) // to allow changing page by clicking tab
                    return false;
            }
 
            if (m_objectForMouseReleaseEvent) {
                const bool res = handleMouseReleaseEvent(m_objectForMouseReleaseEvent, &m_mouseReleaseEvent);
                m_objectForMouseReleaseEvent = 0;
                return res;
            }
            return true;
        }
 
        case TQEvent::MouseButtonRelease:
        {
            TQMouseEvent *mev = static_cast<TQMouseEvent*>(e);
            if (!m_mousePressEventReceived) {
                m_mouseReleaseEvent = *mev;
                m_objectForMouseReleaseEvent = s;
                return true;
            }
            m_mousePressEventReceived = false;
            m_objectForMouseReleaseEvent = 0;
            return handleMouseReleaseEvent(s, mev);
        }
 
        case TQEvent::MouseMove:
        {
            TQMouseEvent *mev = static_cast<TQMouseEvent*>(e);
            if(m_insertBegin!=TQPoint(-1,-1) && FormManager::self()->isInserting() && ((mev->state() == TQt::LeftButton) || (mev->state() == (TQt::LeftButton|TQt::ControlButton)) ||
            (mev->state() == (TQt::LeftButton|TQt::ControlButton|TQt::AltButton)) || (mev->state() == (TQt::LeftButton|TQt::ShiftButton)) ) )
            // draw the insert rect
            {
                drawInsertRect(mev, s);
                return true;
            }
            // Creating a connection, we highlight sender and receiver, and we draw a link between them
            else if(FormManager::self()->isCreatingConnection() && !FormManager::self()->createdConnection()->sender().isNull())
            {
                ObjectTreeItem *tree = m_form->objectTree()->lookup(FormManager::self()->createdConnection()->sender());
                if(!tree || !tree->widget())
                    return true;
 
                if(m_form->formWidget() && (tree->widget() != s))
                    m_form->formWidget()->highlightWidgets(tree->widget(), static_cast<TQWidget*>(s));
            }
            else if(m_insertBegin!=TQPoint(-1,-1) && s == m_container && !m_toplevel && (mev->state() != TQt::ControlButton) && !FormManager::self()->isCreatingConnection()) // draw the selection rect
            {
                if((mev->state() != TQt::LeftButton) || /*m_inlineEditing*/ m_state == InlineEditing)
                    return true;
                int topx = (m_insertBegin.x() < mev->x()) ? m_insertBegin.x() :  mev->x();
                int topy = (m_insertBegin.y() < mev->y()) ? m_insertBegin.y() : mev->y();
                int botx = (m_insertBegin.x() > mev->x()) ? m_insertBegin.x() :  mev->x();
                int boty = (m_insertBegin.y() > mev->y()) ? m_insertBegin.y() : mev->y();
                TQRect r = TQRect(TQPoint(topx, topy), TQPoint(botx, boty));
                m_insertRect = r;
 
                if(m_form->formWidget())
                    m_form->formWidget()->drawRect(r, 1);
 
                m_state = DoingNothing;
                return true;
            }
            else if(mev->state() == (TQt::LeftButton|TQt::ControlButton)) // draw the insert rect for the copied widget
            {
                if(s == m_container)// || (m_form->selectedWidgets()->count() > 1))
                    return true;
                drawCopiedWidgetRect(mev);
                return true;
            }
            else if( ( (mev->state() == TQt::LeftButton) || (mev->state() == (TQt::LeftButton|TQt::ControlButton|TQt::AltButton)) )
              && !FormManager::self()->isInserting() && (m_state != CopyingWidget)) // we are dragging the widget(s) to move it
            {
                if(!m_toplevel && m_moving == m_container) // no effect for form
                    return false;
                if((!m_moving) || (!m_moving->parentWidget()))// || (m_moving->parentWidget()->inherits("TQWidgetStack")))
                        return true;
 
                moveSelectedWidgetsBy(mev->x() - m_grab.x(), mev->y() - m_grab.y());
                m_state = MovingWidget;
            }
 
            return true; // eat
        }
 
        case TQEvent::Paint: // Draw the dotted background
        {
            if(s != m_container)
                return false;
            int gridX = m_form->gridSize();
            int gridY = m_form->gridSize();
 
            TQPainter p(m_container);
            p.setPen(TQPen(white, 2));
            p.setRasterOp(XorROP);
            int cols = m_container->width() / gridX;
            int rows = m_container->height() / gridY;
 
            for(int rowcursor = 1; rowcursor <= rows; ++rowcursor)
            {
                for(int colcursor = 1; colcursor <= cols; ++colcursor)
                {
                    p.drawPoint(-1 + colcursor *gridX, -1 + rowcursor *gridY);
                }
            }
 
            return false;
        }
 
        case TQEvent::Resize: // we are resizing a widget, so we set m_move to true -> the layout will be reloaded when releasing mouse
        {
            if(m_form->interactiveMode())
                m_state = MovingWidget;
            break;
        }
 
        //case TQEvent::AccelOverride:
        case TQEvent::KeyPress:
        {
            TQKeyEvent *kev = static_cast<TQKeyEvent*>(e);
 
            if(kev->key() == Key_F2) // pressing F2 == double-clicking
            {
                m_state = InlineEditing;
                TQWidget *w;
 
                // try to find the widget which was clicked last and should be edited
                if(m_form->selectedWidgets()->count() == 1)
                    w = m_form->selectedWidgets()->first();
                else if(m_form->selectedWidgets()->findRef(m_moving) != -1)
                    w = m_moving;
                else
                    w = m_form->selectedWidgets()->last();
                m_form->library()->startEditing(w->className(), w, this);
            }
            else if(kev->key() == Key_Escape)
            {
                if(FormManager::self()->isCreatingConnection())
                    FormManager::self()->stopCreatingConnection();
                else if(FormManager::self()->isInserting())
                    FormManager::self()->stopInsert();
                return true;
            }
            else if((kev->key() == Key_Control) && (m_state == MovingWidget))
            {
                if(!m_moving)
                    return true;
                // we simulate a mouse move event to update screen
                TQMouseEvent *mev = new TQMouseEvent(TQEvent::MouseMove, m_moving->mapFromGlobal(TQCursor::pos()), TQt::NoButton,
                TQt::LeftButton|TQt::ControlButton );
                eventFilter(m_moving, mev);
                delete mev;
            }
            else if(kev->key() == FormManager::self()->contextMenuKey())
            {
                    FormManager::self()->createContextMenu(static_cast<TQWidget*>(s), this, false);
                    return true;
            }
            else if (kev->key() == Key_Delete)
            {
                FormManager::self()->deleteWidget();
                return true;
            }
            // directional buttons move the widget
            else if(kev->key() == Key_Left){ // move the widget of gridX to the left
                moveSelectedWidgetsBy(-form()->gridSize(), 0);
                return true;
            }
            else if(kev->key() == Key_Right){ // move the widget of gridX to the right
                moveSelectedWidgetsBy(form()->gridSize(), 0);
                return true;
            }
            else if(kev->key() == Key_Up){ // move the widget of gridY to the top
                moveSelectedWidgetsBy(0, - form()->gridSize());
                return true;
            }
            else if(kev->key() == Key_Down){ // move the widget of gridX to the bottom
                moveSelectedWidgetsBy(0, form()->gridSize());
                return true;
            }
            else if((kev->key() == Key_Tab) || (kev->key() == Key_BackTab)){
                ObjectTreeItem *item = form()->objectTree()->lookup(form()->selectedWidgets()->first()->name());
                if(!item || !item->parent())
                    return true;
                ObjectTreeList *list = item->parent()->children();
                if(list->count() == 1)
                    return true;
                int index = list->findRef(item);
 
                if(kev->key() == Key_BackTab){
                    if(index == 0) // go back to the last item
                        index = list->count() - 1;
                    else
                        index = index - 1;
                }
                else  {
                    if(index == int(list->count() - 1)) // go back to the first item
                        index = 0;
                    else
                        index = index + 1;
                }
 
                ObjectTreeItem *nextItem = list->at(index);
                if(nextItem && nextItem->widget())
                    form()->setSelectedWidget(nextItem->widget(), false);
            }
            return true;
        }
 
        case TQEvent::KeyRelease:
        {
            TQKeyEvent *kev = static_cast<TQKeyEvent*>(e);
            if((kev->key() == Key_Control) && (m_state == CopyingWidget)) {
                // cancel copying
                //m_copyRect = TQRect();
                if(m_form->formWidget())
                    m_form->formWidget()->clearForm();
            }
            return true;
        }
 
        case TQEvent::MouseButtonDblClick: // editing
        {
            kdDebug() << "Container: Mouse dbl click for widget " << s->name() << endl;
            TQWidget *w = static_cast<TQWidget*>(s);
            if(!w)
                return false;
 
            //m_inlineEditing = true;
            m_state = InlineEditing;
            m_form->library()->startEditing(w->className(), w, this);
            return true;
        }
 
        case TQEvent::ContextMenu:
        case TQEvent::Enter:
        case TQEvent::Leave:
        case TQEvent::FocusIn:
        case TQEvent::FocusOut:
//      case TQEvent::DragEnter:
//      case TQEvent::DragMove:
//      case TQEvent::DragLeave:
            return true; // eat them
 
        default:
            return false; // let the widget do the rest ...
    }
    return false;
}
 
bool
Container::handleMouseReleaseEvent(TQObject *s, TQMouseEvent *mev)
{
    if(FormManager::self()->isInserting()) // we insert the widget at cursor pos
    {
        if(m_form->formWidget())
            m_form->formWidget()->clearForm();
        KCommand *com = new InsertWidgetCommand(this/*, mev->pos()*/);
        m_form->addCommand(com, true);
        m_insertBegin = TQPoint(-1,-1);
        m_insertRect = TQRect();
        return true;
    }
    else if(s == m_container && !m_toplevel && (mev->button() != TQt::RightButton) && m_insertRect.isValid()) // we are drawing a rect to select widgets
    {
        drawSelectionRect(mev);
        return true;
    }
    if(mev->button() == TQt::RightButton) // Right-click -> context menu
    {
        FormManager::self()->createContextMenu(static_cast<TQWidget*>(s), this);
    }
    else if(mev->state() == (TQt::LeftButton|TQt::ControlButton))// && (m_copyRect.isValid()))
    {
        // copying a widget by Ctrl+dragging
 
        if(m_form->formWidget())
            m_form->formWidget()->clearForm();
        if(s == m_container) // should have no effect on form
            return true;
 
        // prevent accidental copying of widget (when moving mouse a little while selecting)
        if( ( (mev->pos().x() - m_grab.x()) < form()->gridSize() &&  (m_grab.x() - mev->pos().x()) < form()->gridSize() ) &&
            ( (mev->pos().y() - m_grab.y()) < form()->gridSize() &&  (m_grab.y() - mev->pos().y()) < form()->gridSize() ) )
        {
            kdDebug() << "The widget has not been moved. No copying" << endl;
            return true;
        }
 
        m_form->setInteractiveMode(false);
        // We simulate copy and paste
        FormManager::self()->copyWidget();
        if(m_form->selectedWidgets()->count() > 1)
            FormManager::self()->setInsertPoint( mev->pos() );
        else
            FormManager::self()->setInsertPoint( static_cast<TQWidget*>(s)->mapTo(m_container, mev->pos() - m_grab) );
        FormManager::self()->pasteWidget();
        m_form->setInteractiveMode(true);
 
        //m_initialPos = TQPoint();
    }
    else if(m_state == MovingWidget) // one widget has been moved, so we need to update the layout
        reloadLayout();
 
    // cancel copying as user released Ctrl before releasing mouse button
    m_insertBegin = TQPoint(-1,-1);
    m_insertRect = TQRect();
    m_state = DoingNothing;
    return true; // eat
}
 
void
Container::setSelectedWidget(TQWidget *w, bool add, bool dontRaise, bool moreWillBeSelected)
{
    if (w)
        kdDebug() << "slotSelectionChanged " << w->name()<< endl;
 
    if(!w)
    {
        m_form->setSelectedWidget(m_container);
        return;
    }
 
    m_form->setSelectedWidget(w, add, dontRaise, moreWillBeSelected);
}
 
void
Container::unSelectWidget(TQWidget *w)
{
    if(!w)
        return;
 
    m_form->unSelectWidget(w);
}
 
Container*
Container::toplevel()
{
    if(m_toplevel)
        return m_toplevel;
    else
        return this;
}
 
void
Container::deleteWidget(TQWidget *w)
{
    if(!w)
        return;
//  kdDebug() << "Deleting a widget: " << w->name() << endl;
    m_form->objectTree()->removeItem(w->name());
    FormManager::self()->deleteWidgetLater( w );
    m_form->setSelectedWidget(m_container);
}
 
void
Container::widgetDeleted()
{
    m_container = 0;
    deleteLater();
}
 
 
void
Container::setLayout(LayoutType type)
{
    if(m_layType == type)
        return;
 
    delete m_layout;
    m_layout = 0;
    m_layType = type;
 
    switch(type)
    {
        case HBox:
        {
            m_layout = (TQLayout*) new TQHBoxLayout(m_container, m_margin, m_spacing);
            createBoxLayout(new HorWidgetList(m_form->toplevelContainer()->widget()));
            break;
        }
        case VBox:
        {
            m_layout = (TQLayout*) new TQVBoxLayout(m_container, m_margin, m_spacing);
            createBoxLayout(new VerWidgetList(m_form->toplevelContainer()->widget()));
            break;
        }
        case Grid:
        {
            createGridLayout();
            break;
        }
        case  HFlow:
        {
            KexiFlowLayout *flow = new KexiFlowLayout(m_container,m_margin, m_spacing);
            flow->setOrientation(TQt::Horizontal);
            m_layout = (TQLayout*)flow;
            createFlowLayout();
            break;
        }
        case VFlow:
        {
            KexiFlowLayout *flow = new KexiFlowLayout(m_container,m_margin, m_spacing);
            flow->setOrientation(TQt::Vertical);
            m_layout = (TQLayout*)flow;
            createFlowLayout();
            break;
        }
        default:
        {
            m_layType = NoLayout;
            return;
        }
    }
    m_container->setGeometry(m_container->geometry()); // just update layout
    m_layout->activate();
}
 
void
Container::reloadLayout()
{
    LayoutType type = m_layType;
    setLayout(NoLayout);
    setLayout(type);
}
 
void
Container::createBoxLayout(WidgetList *list)
{
    TQBoxLayout *layout = static_cast<TQBoxLayout*>(m_layout);
 
    for(ObjectTreeItem *tree = m_tree->children()->first(); tree; tree = m_tree->children()->next())
        list->append( tree->widget());
    list->sort();
 
    for(TQWidget *obj = list->first(); obj; obj = list->next())
        layout->addWidget(obj);
    delete list;
}
 
void
Container::createFlowLayout()
{
    KexiFlowLayout *flow = dynamic_cast<KexiFlowLayout*>(m_layout);
    if(!flow || m_tree->children()->isEmpty())
        return;
 
    const int offset = 15;
    WidgetList *list=0, *list2=0;
    if(flow->orientation() ==TQt::Horizontal) {
        list = new VerWidgetList(m_form->toplevelContainer()->widget());
        list2 = new HorWidgetList(m_form->toplevelContainer()->widget());
    }
    else {
        list = new HorWidgetList(m_form->toplevelContainer()->widget());
        list2 = new VerWidgetList(m_form->toplevelContainer()->widget());
    }
 
    // fill the list
    for(ObjectTreeItem *tree = m_tree->children()->first(); tree; tree = m_tree->children()->next())
        list->append( tree->widget());
    list->sort();
 
    if(flow->orientation() ==TQt::Horizontal) {
        int y = list->first()->y();
        for(TQWidget *w = list->first(); w; w = list->next()) {
            if( (w->y() > y +offset)) {
                // start a new line
                list2->sort();
                for(TQWidget *obj = list2->first(); obj; obj = list2->next())
                    flow->add(obj);
                list2->clear();
                y = w->y();
            }
            list2->append(w);
        }
 
        list2->sort(); // don't forget the last line
        for(TQWidget *obj = list2->first(); obj; obj = list2->next())
            flow->add(obj);
    }
    else {
        int x = list->first()->x();
        for(TQWidget *w = list->first(); w; w = list->next()) {
            if( (w->x() > x +offset)) {
                // start a new column
                list2->sort();
                for(TQWidget *obj = list2->first(); obj; obj = list2->next())
                    flow->add(obj);
                list2->clear();
                x = w->x();
            }
            list2->append(w);
        }
 
        list2->sort(); // don't forget the last column
        for(TQWidget *obj = list2->first(); obj; obj = list2->next())
            flow->add(obj);
    }
 
    delete list;
    delete list2;
}
 
void
Container::createGridLayout(bool testOnly)
{
    //Those lists sort widgets by y and x
    VerWidgetList *vlist = new VerWidgetList(m_form->toplevelContainer()->widget());
    HorWidgetList *hlist = new HorWidgetList(m_form->toplevelContainer()->widget());
    // The vector are used to store the x (or y) beginning of each column (or row)
    TQValueVector<int> cols;
    TQValueVector<int> rows;
    int end=-1000;
    bool same = false;
 
    for(ObjectTreeItem *tree = m_tree->children()->first(); tree; tree = m_tree->children()->next())
        vlist->append( tree->widget());
    vlist->sort();
 
    for(ObjectTreeItem *tree = m_tree->children()->first(); tree; tree = m_tree->children()->next())
        hlist->append( tree->widget());
    hlist->sort();
 
    // First we need to make sure that two widgets won't be in the same row,
    // ie that no widget overlap another one
    if(!testOnly) {
        for(WidgetListIterator it(*vlist); it.current() != 0; ++it)
        {
            TQWidget *w = it.current();
            WidgetListIterator it2 = it;
 
            for(; it2.current() != 0; ++it2) {
                TQWidget *nextw = it2.current();
                if((w->y() >= nextw->y()) || (nextw->y() >= w->geometry().bottom()))
                    break;
 
                if(!w->geometry().intersects(nextw->geometry()))
                    break;
                // If the geometries of the two widgets intersect each other,
                // we move one of the widget to the rght or bottom of the other
                if((nextw->y() - w->y()) > abs(nextw->x() - w->x()))
                    nextw->move(nextw->x(), w->geometry().bottom()+1);
                else if(nextw->x() >= w->x())
                    nextw->move(w->geometry().right()+1, nextw->y());
                else
                    w->move(nextw->geometry().right()+1, nextw->y());
            }
        }
    }
 
    // Then we count the number of rows in the layout, and set their beginnings
    for(WidgetListIterator it(*vlist); it.current() != 0; ++it)
    {
        TQWidget *w = it.current();
        WidgetListIterator it2 = it;
        if(!same) { // this widget will make a new row
            end = w->geometry().bottom();
            rows.append(w->y());
        }
 
        // If same == true, it means we are in the same row as prev widget
        // (so no need to create a new column)
        ++it2;
        if(!it2.current())
            break;
 
        TQWidget *nextw = it2.current();
        if(nextw->y() >= end)
            same = false;
        else {
            same = !(same && (nextw->y() >= w->geometry().bottom()));
            if(!same)
                end = w->geometry().bottom();
        }
    }
    kdDebug() << "the new grid will have n rows: n == " << rows.size() << endl;
 
    end = -10000;
    same = false;
    // We do the same thing for the columns
    for(WidgetListIterator it(*hlist); it.current() != 0; ++it)
    {
        TQWidget *w = it.current();
        WidgetListIterator it2 = it;
        if(!same) {
            end = w->geometry().right();
            cols.append(w->x());
        }
 
        ++it2;
        if(!it2.current())
            break;
 
        TQWidget *nextw = it2.current();
        if(nextw->x() >= end)
            same = false;
        else {
            same = !(same && (nextw->x() >= w->geometry().right()));
            if(!same)
                end = w->geometry().right();
        }
    }
    kdDebug() << "the new grid will have n columns: n == " << cols.size() << endl;
 
    // We create the layout ..
    TQGridLayout *layout=0;
    if(!testOnly) {
        layout = new TQGridLayout(m_container, rows.size(), cols.size(), m_margin, m_spacing, "grid");
        m_layout = (TQLayout*)layout;
    }
 
    // .. and we fill it with widgets
    for(WidgetListIterator it(*vlist); it.current() != 0; ++it)
    {
        TQWidget *w = it.current();
        TQRect r = w->geometry();
        uint wcol=0, wrow=0, endrow=0, endcol=0;
        uint i = 0;
 
        // We look for widget row(s) ..
        while(r.y() >= rows[i])
        {
            if(rows.size() <= i+1) // we are the last row
            {
                wrow = i;
                break;
            }
            if(r.y() < rows[i+1])
            {
                wrow = i; // the widget will be in this row
                uint j = i + 1;
                // Then we check if the widget needs to span multiple rows
                while(rows.size() >= j+1 && r.bottom() > rows[j])
                {
                    endrow = j;
                    j++;
                }
 
                break;
            }
            i++;
        }
        //kdDebug() << "the widget " << w->name() << " wil be in the row " << wrow <<
           //" and will go to the row " << endrow << endl;
 
        // .. and column(s)
        i = 0;
        while(r.x() >= cols[i])
        {
            if(cols.size() <= i+1) // last column
            {
                wcol = i;
                break;
            }
            if(r.x() < cols[i+1])
            {
                wcol = i;
                uint j = i + 1;
                // Then we check if the widget needs to span multiple columns
                while(cols.size() >= j+1 && r.right() > cols[j])
                {
                    endcol = j;
                    j++;
                }
 
                break;
            }
            i++;
        }
        //kdDebug() << "the widget " << w->name() << " wil be in the col " << wcol <<
         // " and will go to the col " << endcol << endl;
 
        ObjectTreeItem *item = m_form->objectTree()->lookup(w->name());
        if(!endrow && !endcol) {
            if(!testOnly)
                layout->addWidget(w, wrow, wcol);
            item->setGridPos(wrow, wcol, 0, 0);
        }
        else {
            if(!endcol)  endcol = wcol;
            if(!endrow)  endrow = wrow;
            if(!testOnly)
                layout->addMultiCellWidget(w, wrow, endrow, wcol, endcol);
            item->setGridPos(wrow, wcol, endrow-wrow+1, endcol-wcol+1);
        }
    }
}
 
TQString
Container::layoutTypeToString(int type)
{
    switch(type)
    {
        case HBox: return "HBox";
        case VBox: return "VBox";
        case Grid: return "Grid";
        case HFlow: return "HFlow";
        case VFlow: return "VFlow";
        default:   return "NoLayout";
    }
}
 
Container::LayoutType
Container::stringToLayoutType(const TQString &name)
{
    if(name == "HBox") return HBox;
    if(name == "VBox") return VBox;
    if(name == "Grid") return Grid;
    if(name == "HFlow")  return HFlow;
    if(name == "VFlow")  return VFlow;
    return NoLayout;
}
 
void
Container::drawConnection(TQMouseEvent *mev)
{
    if(mev->button() != TQt::LeftButton)
    {
        FormManager::self()->resetCreatedConnection();
        return;
    }
    // First click, we select the sender and display menu to choose signal
    if(FormManager::self()->createdConnection()->sender().isNull())
    {
        FormManager::self()->createdConnection()->setSender(m_moving->name());
        if(m_form->formWidget())
        {
            m_form->formWidget()->initBuffer();
            m_form->formWidget()->highlightWidgets(m_moving, 0/*, TQPoint()*/);
        }
        FormManager::self()->createSignalMenu(m_moving);
        return;
    }
    // the user clicked outside the menu, we cancel the connection
    if(FormManager::self()->createdConnection()->signal().isNull())
    {
        FormManager::self()->stopCreatingConnection();
        return;
    }
    // second click to choose the receiver
    if(FormManager::self()->createdConnection()->receiver().isNull())
    {
        FormManager::self()->createdConnection()->setReceiver(m_moving->name());
        FormManager::self()->createSlotMenu(m_moving);
        m_container->repaint();
        return;
    }
    // the user clicked outside the menu, we cancel the connection
    if(FormManager::self()->createdConnection()->slot().isNull())
    {
        FormManager::self()->stopCreatingConnection();
        return;
    }
}
 
void
Container::drawSelectionRect(TQMouseEvent *mev)
{
    //finish drawing unclipped selection rectangle: clear the surface
    if(m_form->formWidget())
        m_form->formWidget()->clearForm();
    int topx = (m_insertBegin.x() < mev->x()) ? m_insertBegin.x() :  mev->x();
    int topy = (m_insertBegin.y() < mev->y()) ? m_insertBegin.y() : mev->y();
    int botx = (m_insertBegin.x() > mev->x()) ? m_insertBegin.x() :  mev->x();
    int boty = (m_insertBegin.y() > mev->y()) ? m_insertBegin.y() : mev->y();
    TQRect r = TQRect(TQPoint(topx, topy), TQPoint(botx, boty));
 
    setSelectedWidget(m_container, false);
    TQWidget *widgetToSelect = 0;
    // We check which widgets are in the rect and select them
    for(ObjectTreeItem *item = m_tree->children()->first(); item; item = m_tree->children()->next())
    {
        TQWidget *w = item->widget();
        if(!w)
            continue;
        if(w->geometry().intersects(r) && w != m_container) {
            if (widgetToSelect)
                setSelectedWidget(widgetToSelect, true/*add*/, false/*raise*/, true/*moreWillBeSelected*/);
            widgetToSelect = w; //select later
        }
    }
    if (widgetToSelect) //the last one left
        setSelectedWidget(widgetToSelect, true/*add*/, false/*raise*/, false);
 
    m_insertRect = TQRect();
    m_state = DoingNothing;
    m_container->repaint();
}
 
void
Container::drawInsertRect(TQMouseEvent *mev, TQObject *s)
{
    int tmpx, tmpy;
    TQPoint pos = static_cast<TQWidget*>(s)->mapTo(m_container, mev->pos());
    int gridX = m_form->gridSize();
    int gridY = m_form->gridSize();
    if(!FormManager::self()->snapWidgetsToGrid() || (mev->state() == (TQt::LeftButton|TQt::ControlButton|TQt::AltButton)) )
    {
        tmpx = pos.x();
        tmpy = pos.y();
    }
    else
    {
        tmpx = int( (float) pos.x() / ((float)gridX) + 0.5);
        tmpx *= gridX;
        tmpy = int( (float)pos.y() / ((float)gridY) + 0.5);
        tmpy *= gridX;
    }
 
    int topx = (m_insertBegin.x() < tmpx) ? m_insertBegin.x() : tmpx;
    int topy = (m_insertBegin.y() < tmpy) ? m_insertBegin.y() : tmpy;
    int botx = (m_insertBegin.x() > tmpx) ? m_insertBegin.x() : tmpx;
    int boty = (m_insertBegin.y() > tmpy) ? m_insertBegin.y() : tmpy;
    m_insertRect = TQRect(TQPoint(topx, topy), TQPoint(botx, boty));
 
    if(m_insertRect.x() < 0)
        m_insertRect.setLeft(0);
    if(m_insertRect.y() < 0)
        m_insertRect.setTop(0);
    if(m_insertRect.right() > m_container->width())
        m_insertRect.setRight(m_container->width());
    if(m_insertRect.bottom() > m_container->height())
        m_insertRect.setBottom(m_container->height());
 
    if(FormManager::self()->isInserting() && m_insertRect.isValid())
    {
        if(m_form->formWidget())
        {
            TQRect drawRect = TQRect(m_container->mapTo(m_form->widget(), m_insertRect.topLeft())
                , m_insertRect.size());
            m_form->formWidget()->drawRect(drawRect, 2);
        }
    }
}
 
void
Container::drawCopiedWidgetRect(TQMouseEvent *mev)
{
    // We've been dragging a widget, but Ctrl was hold, so we start copy
    if(m_state == MovingWidget)  {
        //FormManager::self()->undo(); // undo last moving
        //m_moving->move(m_initialPos);
        if(m_form->formWidget())  {
            m_container->repaint();
            m_form->formWidget()->initBuffer();
        }
        m_state = CopyingWidget;
    }
 
    //m_copyRect.moveTopLeft(m_container->mapFromGlobal( mev->globalPos()) - m_grab);
 
    if(m_form->formWidget())  {
        TQValueList<TQRect> rectList;
        for(TQWidget *w = m_form->selectedWidgets()->first(); w; w = m_form->selectedWidgets()->next()) {
            TQRect drawRect = w->geometry();
            TQPoint p = mev->pos() - m_grab;
            drawRect.moveBy(p.x(), p.y());
            p = m_container->mapTo(m_form->widget(), TQPoint(0, 0));
            //drawRect = TQRect( ((TQWidget*)s)->mapTo(m_form->widget(), drawRect.topLeft()), drawRect.size());
            drawRect.moveBy(p.x(), p.y());
            rectList.append(drawRect);
        }
 
        m_form->formWidget()->drawRects(rectList, 2);
    }
}
 
void
Container::moveSelectedWidgetsBy(int realdx, int realdy, TQMouseEvent *mev)
{
    if (m_form->selectedWidget() == m_form->widget())
        return; //do not move top-level widget
 
    const int gridX = m_form->gridSize();
    const int gridY = m_form->gridSize();
    int dx=realdx, dy=realdy;
 
    for(TQWidget *w = m_form->selectedWidgets()->first(); w; w = m_form->selectedWidgets()->next())
    {
        if(!w || !w->parent() || w->parent()->inherits("TQTabWidget") || w->parent()->inherits("TQWidgetStack"))
            continue;
 
        if(w->parentWidget() && w->parentWidget()->isA("TQWidgetStack"))
        {
            w = w->parentWidget(); // widget is WidgetStack page
            if(w->parentWidget() && w->parentWidget()->inherits("TQTabWidget")) // widget is tabwidget page
                w = w->parentWidget();
        }
 
        int tmpx = w->x() + realdx;
        int tmpy = w->y() + realdy;
        if(tmpx < 0)
            dx = TQMAX(0 - w->x(), dx); // because dx is <0
        else if(tmpx > w->parentWidget()->width() - gridX)
            dx = TQMIN(w->parentWidget()->width() - gridX - w->x(), dx);
 
        if(tmpy < 0)
            dy = TQMAX(0 - w->y(), dy); // because dy is <0
        else if(tmpy > w->parentWidget()->height() - gridY)
            dy = TQMIN(w->parentWidget()->height() - gridY - w->y(), dy);
    }
 
    for(TQWidget *w = m_form->selectedWidgets()->first(); w; w = m_form->selectedWidgets()->next())
    {
        // Don't move tab widget pages (or widget stack pages)
        if(!w || !w->parent() || w->parent()->inherits("TQTabWidget") || w->parent()->inherits("TQWidgetStack"))
            continue;
 
        if(w->parentWidget() && w->parentWidget()->isA("TQWidgetStack"))
        {
            w = w->parentWidget(); // widget is WidgetStack page
            if(w->parentWidget() && w->parentWidget()->inherits("TQTabWidget")) // widget is tabwidget page
                w = w->parentWidget();
        }
 
        int tmpx, tmpy;
        if(!FormManager::self()->snapWidgetsToGrid() || (mev && mev->state() == (TQt::LeftButton|TQt::ControlButton|TQt::AltButton)) )
        {
            tmpx = w->x() + dx;
            tmpy = w->y() + dy;
        }
        else
        {
            tmpx = int( float( w->x() + dx) / float(gridX) + 0.5) * gridX;
            tmpy = int( float( w->y() + dy) / float(gridY) + 0.5) * gridY;
        }
 
        if((tmpx != w->x()) || (tmpy != w->y()))
            w->move(tmpx,tmpy);
    }
}
 
 
DesignTimeDynamicChildWidgetHandler::DesignTimeDynamicChildWidgetHandler()
 : m_item(0)
{
}
 
DesignTimeDynamicChildWidgetHandler::~DesignTimeDynamicChildWidgetHandler()
{
}
 
void
DesignTimeDynamicChildWidgetHandler::childWidgetAdded(TQWidget* w)
{
    if (m_item) {
        installRecursiveEventFilter(w, m_item->eventEater());
    }
}
 
#include "container.moc"