launcherview.cpp

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.10平台上编译为嵌入式图形界面操作系统。

/**********************************************************************
** Copyright (C) 2000-2005 Trolltech AS.  All rights reserved.
**
** This file is part of the Qtopia Environment.
** 
** 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.
** 
** A copy of the GNU GPL license version 2 is included in this package as 
** LICENSE.GPL.
**
** 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.
**
** In addition, as a special exception Trolltech gives permission to link
** the code of this program with Qtopia applications copyrighted, developed
** and distributed by Trolltech under the terms of the Qtopia Personal Use
** License Agreement. You must comply with the GNU General Public License
** in all respects for all of the code used other than the applications
** licensed under the Qtopia Personal Use License Agreement. If you modify
** this file, you may extend this exception to your version of the file,
** but you are not obligated to do so. If you do not wish to do so, delete
** this exception statement from your version.
** 
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact [e-mail] if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#include "launcherview.h"

#include <qtopia/qpeapplication.h>
#include <qtopia/applnk.h>
#include <qtopia/qpedebug.h>
#include <qtopia/categories.h>
#include <qtopia/categoryselect.h>
#include <qtopia/menubutton.h>
#include <qtopia/mimetype.h>
#include <qtopia/resource.h>
#include <qtopia/qpetoolbar.h>
#include <qtopia/global.h>
#include <qtopia/stringutil.h>
//#include <qtopia/private/palmtoprecord.h>

#include <qaction.h>
#include <qtimer.h>
#include <qtextstream.h>
#include <qdict.h>
#include <qfile.h>
#include <qfileinfo.h>
#include <qhbox.h>
#include <qiconview.h>
#include <qwidgetstack.h>
#include <qpainter.h>
#include <qregexp.h>
#include <qtoolbutton.h>
#include <qimage.h>
#include <qlabel.h>
#include <qobjectlist.h>


// These define how the busy icon is animated and highlighted
#define BRIGHTEN_BUSY_ICON
//#define ALPHA_FADE_BUSY_ICON
//#define USE_ANIMATED_BUSY_ICON_OVERLAY
#define BOUNCE_BUSY_ICON


class BgPixmap
{
public:
    BgPixmap( const QPixmap &p ) : pm(p), ref(1) {}
    QPixmap pm;
    int ref;
};

static QMap<QString,BgPixmap*> *bgCache = 0;

static void cleanup_cache()
{
    QMap<QString,BgPixmap*>::Iterator it = bgCache->begin();
    while ( it != bgCache->end() ) {
	QMap<QString,BgPixmap*>::Iterator curr = it;
	++it;
	delete (*curr);
	bgCache->remove( curr );
    }
    delete bgCache;
    bgCache = 0;
}


class LauncherItem : public QIconViewItem
{
public:
    LauncherItem( QIconView *parent, AppLnk* applnk, bool bigIcon=TRUE );
    ~LauncherItem();

    AppLnk *appLnk() const { return app; }
    AppLnk *takeAppLnk() { AppLnk* r=app; app=0; return r; }

    void animateIcon();
    void resetIcon();

    virtual int compare ( QIconViewItem * i ) const;
    void paintItem( QPainter *p, const QColorGroup &cg );
    void paintFocus( QPainter *, const QColorGroup & ) {}

protected:
    bool isBigIcon;
    int iteration;
    AppLnk* app;
private:
    void paintAnimatedIcon( QPainter *p );
};

#ifdef QTOPIA_PHONE
// XXX share me
static int phoneKeyMatchN(const QString& haystack, const QString& needle, int n)
{
    // XXX cache me / load me
    QString phonekey[8];
    phonekey[0] = "abcABC";
    phonekey[1] = "defDEF";
    phonekey[2] = "ghiGHI";
    phonekey[3] = "jklJKL";
    phonekey[4] = "mnoMNO";
    phonekey[5] = "pqrsQPRS";
    phonekey[6] = "tuvTUV";
    phonekey[7] = "wxyzWXYZ";

    for (int i=0; i<n; i++) {
	int pk = needle[i]-'2';
	if ( pk >= 0 && pk < 8 ) {
	    QChar ch = haystack[i].lower();
	    if ( !phonekey[pk].contains(ch) )
		return ch.unicode() - phonekey[pk][0].unicode();
	}
    }

    return 0; // match!
}
#endif

class LauncherIconView : public QIconView {
    Q_OBJECT
public:
    LauncherIconView( QWidget* parent, const char* name=0 ) :
	QIconView(parent,name),
	tf(""),
	cf(-2),
	bsy(0),
	busyTimer(0),
	bigIcns(TRUE),
	bgColor(white)
    {
#ifdef QTOPIA_PHONE
	keytimer = new QTimer(this);
	connect(keytimer, SIGNAL(timeout()), this, SLOT(keyTimeout()));
#endif
	sortmeth = Name;
	hidden.setAutoDelete(TRUE);
	ike = FALSE;
	calculateGrid( Bottom );
	disconnect(verticalScrollBar(), SIGNAL(valueChanged(int)),
	    this, SLOT(vslide(int)));
	connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
	    this, SLOT(vertScroll(int)));
	connect(this, SIGNAL(myvslide(int)), this, SLOT(vslide(int)));
    }

    ~LauncherIconView()
    {
#if 0 // debuggery
	QListIterator<AppLnk> it(hidden);
	AppLnk* l;
	while ((l=it.current())) {
	    ++it;
	    //qDebug("%p: hidden (should remove)",l);
	}
#endif
    }

    QIconViewItem* busyItem() const { return bsy; }
#ifdef USE_ANIMATED_BUSY_ICON_OVERLAY
    QPixmap busyPixmap() const { return busyPix; }
#endif
    void setBigIcons( bool bi ) {
	bigIcns = bi;
#ifdef USE_ANIMATED_BUSY_ICON_OVERLAY
	busyPix.resize(0,0);
#endif
    }

    void updateCategoriesAndMimeTypes();

    void doAutoScroll()
    {
	// We don't want rubberbanding (yet)
    }

    void setBusy(bool on)
    {
#ifdef USE_ANIMATED_BUSY_ICON_OVERLAY
	if ( busyPix.isNull() ) {
	    int size = ( bigIcns ) ? AppLnk::bigIconSize() : AppLnk::smallIconSize();
	    busyPix.convertFromImage( Resource::loadImage( "busy" ).smoothScale( size * 16, size ) );
	}
#endif

	if ( on ) {
	    busyTimer = startTimer( 100 );
	} else {
	    if ( busyTimer ) {
	        killTimer( busyTimer );
		busyTimer = 0;
	    }
	}

	LauncherItem *c = on ? (LauncherItem*)currentItem() : 0;

	if ( bsy != c ) {
	    LauncherItem *oldBusy = bsy;
	    bsy = c;
	    if ( oldBusy )
		oldBusy->resetIcon();
	    if ( bsy )
		bsy->animateIcon();
	}
    }

    bool inKeyEvent() const { return ike; }

    void keyPressEvent(QKeyEvent* e)
    {
	ike = TRUE;
	if ( e->key() == Key_F33 /* OK button */ || e->key() == Key_Space ) {
	    if ( (e->state() & ShiftButton) )
		emit mouseButtonPressed(ShiftButton, currentItem(), QPoint() );
	    else
		returnPressed(currentItem());
#ifdef QTOPIA_PHONE
	} else if ( e->ascii() >= '2' && e->ascii() <= '9' ) {
	    static const int ABC_AUTOEND_TIME=700;
	    keytimer->start(ABC_AUTOEND_TIME, TRUE);
	    keychars += e->ascii();
	    QIconViewItem* i = firstItem();
	    QIconViewItem* sel = 0;
	    while (i) {
		QString n = i->text();
		int m = phoneKeyMatchN(n,keychars,keychars.length());
		if ( m == 0 ) {
		    sel = i;
		    break;
		} else if ( m > 0 ) {
		    if ( !sel )
			sel = i;
		}
		i = i->nextItem();
	    }
	    if ( sel )
		setCurrentItem(sel);
	} else {
	    keychars = "";
#endif
	}
	QIconView::keyPressEvent(e);
	ike = FALSE;
    }

private:
#ifdef QTOPIA_PHONE
    QString keychars;
    QTimer *keytimer;
#endif

private slots:
    void keyTimeout()
    {
#ifdef QTOPIA_PHONE
	keychars = "";
#endif
    }

signals:
    void myvslide(int pos);

public:

    LauncherItem *addItem(AppLnk* app, bool resort=TRUE);
    bool removeLink(const QString& linkfile);

    QStringList mimeTypes() const;
    QStringList categories() const;

    void clear()
    {
	bsy = 0;
	mimes.clear();
	QIconView::clear();
	hidden.clear();
    }

    void addCatsAndMimes(AppLnk* app)
    {
	// No longer...
	// 	QStringList c = app->categories();
	// 	for (QStringList::ConstIterator cit=c.begin(); cit!=c.end(); ++cit) {
	// 	    cats.replace(*cit,(void*)1);
	// 	}
	QString maj=app->type();
	int sl=maj.find('/');
	if (sl>=0) {
	    QString k;
	    k = maj.left(12) == "application/" ? maj : maj.left(sl);
	    mimes.replace(k,(void*)1);
	}
    }

    void setBackgroundOrigin( QWidget::BackgroundOrigin ) {
    }

    void setBackgroundPixmap( const QPixmap &pm ) {
	QIconView::setBackgroundPixmap(pm);
	bgPixmap = pm;
    }

    void setBackgroundColor( const QColor &c ) {
	bgColor = c;
    }

    void drawBackground( QPainter *p, const QRect &r )
    {
	if ( !bgPixmap.isNull() ) {
	    if (!hasStaticBackground()) {
		p->drawTiledPixmap( r, bgPixmap,
			QPoint( (r.x() + contentsX()) % bgPixmap.width(),
			    (r.y() + contentsY()) % bgPixmap.height() ) );
	    } else {
		QPoint offs(0, 0);
		offs = mapToGlobal(offs);
		p->drawPixmap(r.x(), r.y(), bgPixmap,
			    r.x()+offs.x(), r.y()+offs.y(), r.width(), r.height());
	    }
	} else {
#ifdef QTOPIA_PHONE
	    QIconView::drawBackground(p, r);
#else
	    p->fillRect( r, bgColor );
#endif
	}
    }

    void setItemTextPos( ItemTextPos pos )
    {
	calculateGrid( pos );
	QIconView::setItemTextPos( pos );
    }

    void hideOrShowItems(bool resort);

    void setTypeFilter(const QString& typefilter, bool resort)
    {
	tf = QRegExp(typefilter,FALSE,TRUE);
	hideOrShowItems(resort);
    }

    void setCategoryFilter( int catfilter, bool resort )
    {
	Categories cat;
	cat.load( categoryFileName() );
	QString str;
	cf = catfilter;
	hideOrShowItems(resort);
    }

    enum SortMethod { Name, Date, Type };

    void setSortMethod( SortMethod m )
    {
	if ( sortmeth != m ) {
	    sortmeth = m;
	    sort();
	}
    }

    int compare(const AppLnk* a, const AppLnk* b)
    {
	switch (sortmeth) {
	case Name:
	    return Qtopia::dehyphenate(a->name()).lower()
          .compare(Qtopia::dehyphenate(b->name()).lower());
	case Date: {
	    QFileInfo fa(a->linkFileKnown() ? a->linkFile() : a->file());
	    QFileInfo fb(b->linkFileKnown() ? b->linkFile() : b->file());
	    return fa.lastModified().secsTo(fb.lastModified());
	}
	case Type:
	    return a->type().compare(b->type());
	}
	return 0;
    }

protected:

    void timerEvent( QTimerEvent *te )
    {
	if ( te->timerId() == busyTimer ) {
	    if ( bsy )
		bsy->animateIcon();
	} else {
	    QIconView::timerEvent( te );
	}
    }

    void styleChange( QStyle &old )
    {
	QIconView::styleChange( old );
	calculateGrid( itemTextPos() );
    }

    void calculateGrid( ItemTextPos pos )
    {
	int dw = QApplication::desktop()->width();
	int viewerWidth = dw-style().scrollBarExtent().width();
	if ( pos == Bottom ) {
	    int cols = 3;
	    if ( viewerWidth <= 200 )
		cols = 2;
	    else if ( viewerWidth >= 400 )
		 cols = viewerWidth/96;
	    setSpacing( 4 );
	    setGridX( (viewerWidth-(cols+1)*spacing())/cols );
	    setGridY( fontMetrics().height()*2+24 );
	} else {
	    int cols = 2;
#ifdef QTOPIA_PHONE
	    if ( viewerWidth < 240 )
#else
	    if ( viewerWidth < 150 )
#endif
		cols = 1;
	    else if ( viewerWidth >= 400 )
		 cols = viewerWidth/150;
	    setSpacing( 2 );
	    setGridX( (viewerWidth-(cols+1)*spacing())/cols );
	    setGridY( fontMetrics().height()+2 );
	}
    }

    void resizeEvent( QResizeEvent *e )
    {
	QIconView::resizeEvent(e);
	if ((e->size().width() != e->oldSize().width()) || (e->size().height() != e->oldSize().height())) {
	    calculateGrid(itemTextPos());
	    hideOrShowItems(FALSE);
	}
    }

    void focusInEvent( QFocusEvent * ) {}
    void focusOutEvent( QFocusEvent * ) {}

private slots:
    void vertScroll(int pos) {
	if (hasStaticBackground()) {
	    if (pos < verticalScrollBar()->maxValue()) {
		int step = gridY()+spacing();
		pos = (pos + step/2) / step * step;
	    }
	}
	emit myvslide(pos);
    }

private:
    QList<AppLnk> hidden;
    QDict<void> mimes;
    SortMethod sortmeth;
    QRegExp tf;
    int cf;
    LauncherItem* bsy;
    int busyTimer;
    bool ike;
    bool bigIcns;
    QPixmap bgPixmap;
    QColor bgColor;
#ifdef USE_ANIMATED_BUSY_ICON_OVERLAY
    QPixmap busyPix;
#endif
};


bool LauncherView::bsy=FALSE;

void LauncherView::setBusy(bool on)
{
    icons->setBusy(on);
}

LauncherItem::LauncherItem( QIconView *parent, AppLnk *applnk, bool bigIcon )
    : QIconViewItem( parent, applnk->name(),
           bigIcon ? applnk->bigPixmap() :applnk->pixmap() ),
	isBigIcon( bigIcon ),
	iteration(0),
	app(applnk) // Takes ownership
{
}

LauncherItem::~LauncherItem()
{
    LauncherIconView* liv = (LauncherIconView*)iconView();
    if ( liv->busyItem() == this )
	liv->setBusy(FALSE);
    delete app;
}

int LauncherItem::compare ( QIconViewItem * i ) const
{
    LauncherIconView* view = (LauncherIconView*)iconView();
    return view->compare(app,((LauncherItem *)i)->appLnk());
}

void LauncherItem::paintItem( QPainter *p, const QColorGroup &cg )
{
    LauncherIconView* liv = (LauncherIconView*)iconView();
    QBrush oldBrush( liv->itemTextBackground() );
    QColorGroup mycg( cg );
    if ( liv->currentItem() == this ) {
	liv->setItemTextBackground( cg.brush( QColorGroup::Highlight ) );
	mycg.setColor( QColorGroup::Text, cg.color( QColorGroup::HighlightedText ) );
    }

    QIconViewItem::paintItem(p,mycg);

    // Paint animation overlay
    if ( liv->busyItem() == this ) 
	paintAnimatedIcon(p);

    if ( liv->currentItem() == this )
	liv->setItemTextBackground( oldBrush );
}

void LauncherItem::paintAnimatedIcon( QPainter *p )
{
    LauncherIconView* liv = (LauncherIconView*)iconView();
    int w = pixmap()->width(), h = pixmap()->height();
    QPixmap dblBuf( w, h + 4 );
    QPainter p2( &dblBuf );
    int x1, y1;
    if ( liv->itemTextPos() == QIconView::Bottom ) {
	x1 = x() + (width() - w) / 2 - liv->contentsX();
	y1 = y() - liv->contentsY();
    } else {
	x1 = x() - liv->contentsX();
	y1 = y() + (height() - h) / 2 - liv->contentsY();
    }
    y1 -= 2;
    p2.translate(-x1,-y1);
    liv->drawBackground( &p2, QRect(x1,y1,w,h+4) );
    int bounceY = 2;
#ifdef BOUNCE_BUSY_ICON
    bounceY = 4 - ((iteration+2)%8);
    bounceY = bounceY < 0 ? -bounceY : bounceY;
#endif
    p2.drawPixmap( x1, y1 + bounceY, *pixmap() );
#ifdef USE_ANIMATED_BUSY_ICON_OVERLAY
    int pic = iteration % 16;
    p2.drawPixmap( x1, y1 + bounceY, liv->busyPixmap(), w * pic, 0, w, h );
#endif
    p->drawPixmap( x1, y1, dblBuf );
}

void LauncherItem::animateIcon()
{
    LauncherIconView* liv = (LauncherIconView*)iconView();

    if ( liv->busyItem() != this || !app )
	return;

    // Highlight the icon
    if ( iteration == 0 ) {
	QPixmap src = isBigIcon ? app->bigPixmap() : app->pixmap();
	QImage img = src.convertToImage();
	QRgb *rgb;
	int count;
	if ( img.depth() == 32 ) {
	    rgb = (QRgb*)img.bits();
	    count = img.bytesPerLine()/sizeof(QRgb)*img.height();
	} else {
	    rgb = img.colorTable();
	    count = img.numColors();
	}
	for ( int r = 0; r < count; r++, rgb++ ) {
#if defined(BRIGHTEN_BUSY_ICON)
	    QColor c(*rgb);
	    int h, s, v;
	    c.hsv(&h,&s,&v);
	    c.setHsv(h,QMAX(s-24,0),QMIN(v+48,255));
	    *rgb = qRgba(c.red(),c.green(),c.blue(),qAlpha(*rgb));
#elif defined(ALPHA_FADE_BUSY_ICON)
	    *rgb = qRgba(qRed(*rgb),qGreen(*rgb),qBlue(*rgb),qAlpha(*rgb)/2);
#endif
	}
	src.convertFromImage( img );
	setPixmap( src );
    }

    iteration++;

    // Paint animation overlay
    QPainter p( liv->viewport() );
    paintAnimatedIcon( &p );
}

void LauncherItem::resetIcon()
{
    iteration = 0;
    setPixmap( isBigIcon ? app->bigPixmap() : app->pixmap() );
}

//===========================================================================

QStringList LauncherIconView::mimeTypes() const
{
    QStringList r;
    QDictIterator<void> it(mimes);
    while (it.current()) {