menubareditor.cpp

这个是Linux的qt源代码

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** Copyright (C) 2003 Trolltech AS.  All rights reserved.
**
** This file is part of Qt Designer.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
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** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
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#include <qaction.h>
#include <qapplication.h>
#include <qbitmap.h>
#include <qdragobject.h>
#include <qlineedit.h>
#include <qmainwindow.h>
#include <qpainter.h>
#include <qstyle.h>
#include "command.h"
#include "formwindow.h"
#include "menubareditor.h"
#include "popupmenueditor.h"

extern void find_accel( const QString &txt, QMap<QChar, QWidgetList > &accels, QWidget *w );

// Drag Object Declaration -------------------------------------------

class MenuBarEditorItemPtrDrag : public QStoredDrag
{
public:
    MenuBarEditorItemPtrDrag( MenuBarEditorItem * item,
			      QWidget * parent = 0,
			      const char * name = 0 );
    ~MenuBarEditorItemPtrDrag() {};
    static bool canDecode( QDragMoveEvent * e );
    static bool decode( QDropEvent * e, MenuBarEditorItem ** i );
};

// Drag Object Implementation ---------------------------------------

MenuBarEditorItemPtrDrag::MenuBarEditorItemPtrDrag( MenuBarEditorItem * item,
						    QWidget * parent,
						    const char * name )
    : QStoredDrag( "qt/menubareditoritemptr", parent, name )
{
    QByteArray data( sizeof( Q_LONG ) );
    QDataStream stream( data, IO_WriteOnly );
    stream << ( Q_LONG ) item;
    setEncodedData( data );
}

bool MenuBarEditorItemPtrDrag::canDecode( QDragMoveEvent * e )
{
    return e->provides( "qt/menubareditoritemptr" );
}

bool MenuBarEditorItemPtrDrag::decode( QDropEvent * e, MenuBarEditorItem ** i )
{
    QByteArray data = e->encodedData( "qt/menubareditoritemptr" );
    QDataStream stream( data, IO_ReadOnly );

    if ( !data.size() )
	return FALSE;

    Q_LONG p = 0;
    stream >> p;
    *i = ( MenuBarEditorItem *) p;

    return TRUE;
}

// MenuBarEditorItem ---------------------------------------------------

MenuBarEditorItem::MenuBarEditorItem( MenuBarEditor * bar, QObject * parent, const char * name )
    : QObject( parent, name ),
      menuBar( bar ),
      popupMenu( 0 ),
      visible( TRUE ),
      separator( FALSE ),
      removable( FALSE )
{ }

MenuBarEditorItem::MenuBarEditorItem( PopupMenuEditor * menu, MenuBarEditor * bar,
				      QObject * parent, const char * name )
    : QObject( parent, name ),
      menuBar( bar ),
      popupMenu( menu ),
      visible( TRUE ),
      separator( FALSE ),
      removable( TRUE )
{
    text = menu->name();
}

MenuBarEditorItem::MenuBarEditorItem( QActionGroup * actionGroup, MenuBarEditor * bar,
				      QObject * parent, const char * name )
    : QObject( parent, name ),
      menuBar( bar ),
      popupMenu( 0 ),
      visible( TRUE ),
      separator( FALSE ),
      removable( TRUE )
{
    text = actionGroup->menuText();
    popupMenu = new PopupMenuEditor( menuBar->formWindow(), menuBar );
    popupMenu->insert( actionGroup );
}

MenuBarEditorItem::MenuBarEditorItem( MenuBarEditorItem * item, QObject * parent, const char * name )
    : QObject( parent, name ),
      menuBar( item->menuBar ),
      popupMenu( 0 ),
      text( item->text ),
      visible( item->visible ),
      separator( item->separator ),
      removable( item->removable )
{
    popupMenu = new PopupMenuEditor( menuBar->formWindow(), item->popupMenu, menuBar );
}

// MenuBarEditor --------------------------------------------------------

int MenuBarEditor::clipboardOperation = 0;
MenuBarEditorItem * MenuBarEditor::clipboardItem = 0;

MenuBarEditor::MenuBarEditor( FormWindow * fw, QWidget * parent, const char * name )
    : QMenuBar( parent, name ),
      formWnd( fw ),
      draggedItem( 0 ),
      currentIndex( 0 ),
      itemHeight( 0 ),
      separatorWidth( 32 ),
      hideWhenEmpty( TRUE ),
      hasSeparator( FALSE )
{
    setAcceptDrops( TRUE );
    setFocusPolicy( StrongFocus );

    addItem.setMenuText( tr("new menu") );
    addSeparator.setMenuText( tr("new separator") );

    lineEdit = new QLineEdit( this, "menubar lineedit" );
    lineEdit->hide();
    lineEdit->setFrameStyle(QFrame::Plain | QFrame::NoFrame);
    lineEdit->polish();
    lineEdit->setBackgroundMode(PaletteButton);
    lineEdit->setBackgroundOrigin(ParentOrigin);
    lineEdit->installEventFilter( this );

    dropLine = new QWidget( this, "menubar dropline", Qt::WStyle_NoBorder | WStyle_StaysOnTop );
    dropLine->setBackgroundColor( Qt::red );
    dropLine->hide();

    setMinimumHeight( fontMetrics().height() + 2 * borderSize() );
}

MenuBarEditor::~MenuBarEditor()
{
    itemList.setAutoDelete( TRUE );
}

FormWindow * MenuBarEditor::formWindow()
{
    return formWnd;
}

MenuBarEditorItem * MenuBarEditor::createItem( int index, bool addToCmdStack )
{
    MenuBarEditorItem * i =
	new MenuBarEditorItem( new PopupMenuEditor( formWnd, ( QWidget * ) parent() ), this );
    if ( addToCmdStack ) {
	AddMenuCommand * cmd = new AddMenuCommand( "Add Menu", formWnd, this, i, index );
	formWnd->commandHistory()->addCommand( cmd );
	cmd->execute();
    } else {
	AddMenuCommand cmd( "Add Menu", formWnd, this, i, index );
	cmd.execute();
    }
    return i;
}

void MenuBarEditor::insertItem( MenuBarEditorItem * item, int index )
{
    item->menu()->parentMenu = this;

    if ( index != -1 )
	itemList.insert( index, item );
    else
	itemList.append( item );

    if ( hideWhenEmpty && itemList.count() == 1 )
	show(); // calls resizeInternals();
    else
	resizeInternals();

    if ( isVisible() )
	update();
}

void MenuBarEditor::insertItem( QString text, PopupMenuEditor * menu, int index )
{
    MenuBarEditorItem * item = new MenuBarEditorItem( menu, this );
    if ( !text.isNull() )
	item->setMenuText( text );
    insertItem( item, index );
}

void MenuBarEditor::insertItem( QString text, QActionGroup * group, int index )
{
    MenuBarEditorItem * item = new MenuBarEditorItem( group, this );
    if ( !text.isNull() )
	item->setMenuText( text );
    insertItem( item, index );
}


void MenuBarEditor::insertSeparator( int index )
{
    if ( hasSeparator )
	return;

    MenuBarEditorItem * i = createItem( index );
    i->setSeparator( TRUE );
    i->setMenuText( "separator" );
    hasSeparator = TRUE;
}

void MenuBarEditor::removeItemAt( int index )
{
    removeItem( item( index ) );
}

void MenuBarEditor::removeItem( MenuBarEditorItem * item )
{
    if ( item &&
	 item->isRemovable() &&
	 itemList.removeRef( item ) ) {

	if ( item->isSeparator() )
	    hasSeparator = FALSE;

	if ( hideWhenEmpty && itemList.count() == 0 )
	    hide();
	else
	    resizeInternals();

	int n = count() + 1;
	if ( currentIndex >=  n )
	    currentIndex = n;

	if ( isVisible() )
	    update();
    }
}

int MenuBarEditor::findItem( MenuBarEditorItem * item )
{
    return itemList.findRef( item );
}

int MenuBarEditor::findItem( PopupMenuEditor * menu )
{
    MenuBarEditorItem * i = itemList.first();

    while ( i ) {
	if ( i->menu() == menu )
	    return itemList.at();
	i = itemList.next();
    }

    return -1;
}

int MenuBarEditor::findItem( QPoint & pos )
{
    int x = borderSize();
    int dx = 0;
    int y = 0;
    int w = width();
    QSize s;
    QRect r;

    MenuBarEditorItem * i = itemList.first();

    while ( i ) {

	if ( i->isVisible() ) {

	    s = itemSize( i );
	    dx = s.width();

	    if ( x + dx > w && x > borderSize() ) {
		y += itemHeight;
		x = borderSize();
	    }

	    r = QRect( x, y, s.width(), s.height() );

	    if ( r.contains( pos ) )
		return itemList.at();

	    addItemSizeToCoords( i, x, y, w );
	}

	i = itemList.next();
    }

    // check add item
    s = itemSize( &addItem );
    dx = s.width();

    if ( x + dx > w && x > borderSize() ) {
	y += itemHeight;
	x = borderSize();
    }

    r = QRect( x, y, s.width(), s.height() );

    if ( r.contains( pos ) )
	return itemList.count();

    return itemList.count() + 1;
}

MenuBarEditorItem * MenuBarEditor::item( int index )
{
    if ( index == -1 )
	return itemList.at( currentIndex );

    int c = itemList.count();
    if ( index == c )
	return &addItem;
    else if ( index > c )
	return &addSeparator;

    return itemList.at( index );
}

int MenuBarEditor::count()
{
    return itemList.count();
}

int MenuBarEditor::current()
{
    return currentIndex;
}

void MenuBarEditor::cut( int index )
{
    if ( clipboardItem && clipboardOperation == Cut )
	delete clipboardItem;

    clipboardOperation = Cut;
    clipboardItem = itemList.at( index );

    if ( clipboardItem == &addItem || clipboardItem == &addSeparator ) {
	clipboardOperation = None;
	clipboardItem = 0;
	return; // do nothing
    }

    RemoveMenuCommand * cmd = new RemoveMenuCommand( "Cut Menu", formWnd, this, index );
    formWnd->commandHistory()->addCommand( cmd );
    cmd->execute();
}

void MenuBarEditor::copy( int index )
{
    if ( clipboardItem && clipboardOperation == Cut )
	delete clipboardItem;

    clipboardOperation = Copy;
    clipboardItem = itemList.at( index );

    if ( clipboardItem == &addItem || clipboardItem == &addSeparator ) {
	clipboardOperation = None;
	clipboardItem = 0;
    }
}

void MenuBarEditor::paste( int index )
{
    if ( clipboardItem && clipboardOperation ) {
	MenuBarEditorItem * i = new MenuBarEditorItem( clipboardItem );
	AddMenuCommand * cmd = new AddMenuCommand( "Paste Menu", formWnd, this, i, index );
	formWnd->commandHistory()->addCommand( cmd );
	cmd->execute();
    }
}

void MenuBarEditor::exchange( int a, int b )
{
    MenuBarEditorItem * ia = itemList.at( a );
    MenuBarEditorItem * ib = itemList.at( b );
    if ( !ia || !ib ||
	 ia == &addItem || ia == &addSeparator ||
	 ib == &addItem || ib == &addSeparator )
	return; // do nothing
    itemList.replace( b, ia );
    itemList.replace( a, ib );
}

void MenuBarEditor::showLineEdit( int index )
{
    if ( index == -1 )
	index = currentIndex;

    MenuBarEditorItem * i = 0;

    if ( (uint) index >= itemList.count() )
	i = &addItem;
    else
	i = itemList.at( index );

    if ( i && i->isSeparator() )
	return;

    // open edit field for item name
    lineEdit->setText( i->menuText() );
    lineEdit->selectAll();
    QPoint pos = itemPos( index );
    lineEdit->move( pos.x() + borderSize(), pos.y() - ( borderSize() / 2 ) );
    lineEdit->resize( itemSize( i ) );
    lineEdit->show();
    lineEdit->setFocus();
}

void MenuBarEditor::showItem( int index )
{
    if ( index == -1 )
	index = currentIndex;

    if ( (uint)index < itemList.count() ) {
	MenuBarEditorItem * i = itemList.at( index );
	if ( i->isSeparator() || draggedItem )
	    return;
	PopupMenuEditor * m = i->menu();
	QPoint pos = itemPos( index );
	m->move( pos.x(), pos.y() + itemHeight - 1 );
	m->raise();
	m->show();
	setFocus();
    }
}

void MenuBarEditor::hideItem( int index )
{
    if ( index == -1 )
	index = currentIndex;

    if ( (uint)index < itemList.count() ) {
	PopupMenuEditor * m = itemList.at( index )->menu();
	m->hideSubMenu();
	m->hide();
    }
}

void MenuBarEditor::focusItem( int index )
{
    if ( index == -1 )
	index = currentIndex;

    if ( (uint)index < itemList.count() ) {
	PopupMenuEditor * m = itemList.at( index )->menu();
	m->setFocus();
	m->update();
	update();
    }
}

void MenuBarEditor::deleteItem( int index )
{
    if ( index == -1 )
	index = currentIndex;

    if ( (uint)index < itemList.count() ) {
	RemoveMenuCommand * cmd = new RemoveMenuCommand( "Delete Menu",
							 formWnd,
							 this,
							 currentIndex );
	formWnd->commandHistory()->addCommand( cmd );
	cmd->execute();
    }
}

QSize MenuBarEditor::sizeHint() const
{
    return QSize( parentWidget()->width(), heightForWidth( parentWidget()->width() ) );
}

int MenuBarEditor::heightForWidth( int max_width ) const
{
    MenuBarEditor * that = ( MenuBarEditor * ) this;
    int x = borderSize();
    int y = 0;

    QPainter p( this );
    that->itemHeight = that->itemSize( &(that->addItem) ).height();

    MenuBarEditorItem * i = that->itemList.first();
    while ( i ) {
	if ( i->isVisible() )
	    that->addItemSizeToCoords( i, x, y, max_width );
	i = that->itemList.next();
    }

    that->addItemSizeToCoords( &(that->addItem), x, y, max_width );
    that->addItemSizeToCoords( &(that->addSeparator), x, y, max_width );

    return y + itemHeight;
}

void MenuBarEditor::show()
{
    QWidget::show();
    resizeInternals();

    QResizeEvent e( parentWidget()->size(), parentWidget()->size() );
    QApplication::sendEvent( parentWidget(), &e );
}

void MenuBarEditor::checkAccels( QMap<QChar, QWidgetList > &accels )
{
    QString t;
    MenuBarEditorItem * i = itemList.first();
    while ( i ) {
	t = i->menuText();
	find_accel( t, accels, this );
	// do not check the accelerators in the popup menus
	i = itemList.next();
    }
}

// public slots

void MenuBarEditor::cut()
{
    cut( currentIndex );
}

void MenuBarEditor::copy()
{
    copy( currentIndex );
}

void MenuBarEditor::paste()