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k3b/libk3b/tools/k3btitlelabel.cpp

267 lines
6.5 KiB

/*
*
* $Id: k3btitlelabel.cpp 619556 2007-01-03 17:38:12Z trueg $
* Copyright (C) 2003 Sebastian Trueg <trueg@k3b.org>
*
* This file is part of the K3b project.
* Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
*
* 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.
* See the file "COPYING" for the exact licensing terms.
*/
#include "k3btitlelabel.h"
#include <k3bstringutils.h>
#include <tqpainter.h>
#include <tqevent.h>
#include <tqfontmetrics.h>
#include <tqfont.h>
#include <tqtooltip.h>
class K3bTitleLabel::Private
{
public:
Private() {
titleLength = subTitleLength = 0;
margin = 2;
alignment = TQt::AlignLeft;
cachedMinimumWidth = 0;
titleBaseLine = 0;
}
TQString title;
TQString subTitle;
TQString displayTitle;
TQString displaySubTitle;
int alignment;
int titleLength;
int subTitleLength;
int displayTitleLength;
int displaySubTitleLength;
int titleBaseLine;
int subTitleBaseLine;
int margin;
int cachedMinimumWidth;
};
class K3bTitleLabel::ToolTip : public TQToolTip
{
public:
ToolTip( K3bTitleLabel* label )
: TQToolTip( label ),
m_label(label) {
}
void maybeTip( const TQPoint &pos ) {
TQRect r = m_label->contentsRect();
int neededWidth = m_label->d->displayTitleLength;
if( !m_label->d->displaySubTitle.isEmpty() )
neededWidth += m_label->d->displaySubTitleLength + 5;
int startPos = 0;
if( m_label->d->alignment & TQt::AlignHCenter )
startPos = r.left() + ( r.width() - 2*m_label->d->margin - neededWidth ) / 2;
else if( m_label->d->alignment & TQt::AlignRight )
startPos = r.right() - m_label->d->margin - neededWidth;
else
startPos = r.left() + m_label->d->margin;
TQRect titleTipRect( startPos, 0, m_label->d->displayTitleLength, m_label->height() );
TQRect subTitleTipRect( startPos + m_label->d->displayTitleLength, 0, m_label->d->displaySubTitleLength, m_label->height() );
if( titleTipRect.contains( pos ) &&
m_label->d->displayTitle != m_label->d->title )
tip( titleTipRect, m_label->d->title );
else if( subTitleTipRect.contains( pos ) &&
m_label->d->displaySubTitle != m_label->d->subTitle )
tip( subTitleTipRect, m_label->d->subTitle );
}
K3bTitleLabel* m_label;
};
K3bTitleLabel::K3bTitleLabel( TQWidget* parent, const char* name )
: TQFrame( parent, name )
{
d = new Private();
m_toolTip = new ToolTip( this );
}
K3bTitleLabel::~K3bTitleLabel()
{
delete m_toolTip;
delete d;
}
void K3bTitleLabel::setTitle( const TQString& title, const TQString& subTitle )
{
d->title = title;
d->subTitle = subTitle;
updatePositioning();
update();
}
void K3bTitleLabel::setSubTitle( const TQString& subTitle )
{
d->subTitle = subTitle;
updatePositioning();
update();
}
void K3bTitleLabel::setAlignment( int align )
{
d->alignment = align;
update();
}
TQSize K3bTitleLabel::sizeHint() const
{
return TQSize( d->titleLength + d->subTitleLength + 2*d->margin, d->titleBaseLine );
}
TQSize K3bTitleLabel::minimumSizeHint() const
{
return TQSize( d->cachedMinimumWidth, d->titleBaseLine );
}
void K3bTitleLabel::resizeEvent( TQResizeEvent* e )
{
TQFrame::resizeEvent( e );
updatePositioning();
update();
}
void K3bTitleLabel::drawContents( TQPainter* p )
{
p->save();
TQRect r = contentsRect();
p->eraseRect( r );
TQFont f(font());
f.setBold(true);
f.setPointSize( f.pointSize() + 2 );
p->setFont(f);
int neededWidth = d->displayTitleLength;
if( !d->displaySubTitle.isEmpty() )
neededWidth += d->displaySubTitleLength + 5;
int startPos = 0;
if( d->alignment & TQt::AlignHCenter )
startPos = r.left() + ( r.width() - 2*d->margin - neededWidth ) / 2;
else if( d->alignment & TQt::AlignRight )
startPos = r.right() - d->margin - neededWidth;
else
startPos = r.left() + d->margin;
// paint title
p->drawText( startPos, r.top() + d->titleBaseLine, d->displayTitle );
if( !d->subTitle.isEmpty() ) {
f.setBold(false);
f.setPointSize( f.pointSize() - 4 );
p->setFont(f);
p->drawText( startPos + d->displayTitleLength + 5, r.top() + d->subTitleBaseLine, d->displaySubTitle );
}
p->restore();
}
void K3bTitleLabel::setMargin( int m )
{
d->margin = m;
updatePositioning();
update();
}
void K3bTitleLabel::updatePositioning()
{
TQFont f(font());
f.setBold(true);
f.setPointSize( f.pointSize() + 2 );
TQFontMetrics titleFm(f);
f.setBold(false);
f.setPointSize( f.pointSize() - 4 );
TQFontMetrics subTitleFm(f);
d->titleBaseLine = contentsRect().height()/2 + titleFm.height()/2 - titleFm.descent();
d->titleLength = titleFm.width( d->title );
d->subTitleBaseLine = d->titleBaseLine - titleFm.underlinePos() + subTitleFm.underlinePos();
d->subTitleLength = ( d->subTitle.isEmpty() ? 0 : subTitleFm.width( d->subTitle ) );
// cut the text to window width
d->displayTitle = d->title;
d->displaySubTitle = d->subTitle;
int widthAvail = contentsRect().width() - 2*margin();
// 5 pix spacing between title and subtitle
if( !d->subTitle.isEmpty() )
widthAvail -= 5;
if( d->titleLength > widthAvail/2 ) {
if( d->subTitleLength <= widthAvail/2 )
d->displayTitle = K3b::cutToWidth( titleFm, d->title, widthAvail - d->subTitleLength );
else
d->displayTitle = K3b::cutToWidth( titleFm, d->title, widthAvail/2 );
}
if( d->subTitleLength > widthAvail/2 ) {
if( d->titleLength <= widthAvail/2 )
d->displaySubTitle = K3b::cutToWidth( subTitleFm, d->subTitle, widthAvail - d->titleLength );
else
d->displaySubTitle = K3b::cutToWidth( subTitleFm, d->subTitle, widthAvail/2 );
}
d->displayTitleLength = titleFm.width( d->displayTitle );
d->displaySubTitleLength = subTitleFm.width( d->displaySubTitle );
//
// determine the minimum width for the minumum size hint
//
d->cachedMinimumWidth = 2*d->margin;
TQString cutTitle = d->title;
if( cutTitle.length() > 2 ) {
cutTitle.truncate( 2 );
cutTitle += "...";
}
TQString cutSubTitle = d->subTitle;
if( cutSubTitle.length() > 2 ) {
cutSubTitle.truncate( 2 );
cutSubTitle += "...";
}
d->cachedMinimumWidth += titleFm.width( cutTitle ) + subTitleFm.width( cutSubTitle );
// 5 pix spacing between title and subtitle
if( !d->subTitle.isEmpty() )
d->cachedMinimumWidth += 5;
}
#include "k3btitlelabel.moc"