1 files changed, 266 insertions, 0 deletions
diff --git a/libk3b/tools/k3btitlelabel.cpp b/libk3b/tools/k3btitlelabel.cpp
new file mode 100644
index 0000000..9e1f18b
--- /dev/null
+++ b/libk3b/tools/k3btitlelabel.cpp
@@ -0,0 +1,266 @@
+/* 
+ *
+ * $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 <qpainter.h>
+#include <qevent.h>
+#include <qfontmetrics.h>
+#include <qfont.h>
+#include <qtooltip.h>
+
+
+class K3bTitleLabel::Private
+{
+public:
+  Private() {
+    titleLength = subTitleLength = 0;
+    margin = 2;
+    alignment = Qt::AlignLeft;
+    cachedMinimumWidth = 0;
+    titleBaseLine = 0;
+  }
+
+  QString title;
+  QString subTitle;
+
+  QString displayTitle;
+  QString displaySubTitle;
+
+  int alignment;
+
+  int titleLength;
+  int subTitleLength;
+  int displayTitleLength;
+  int displaySubTitleLength;
+  int titleBaseLine;
+  int subTitleBaseLine;
+  int margin;
+
+  int cachedMinimumWidth;
+};
+
+
+class K3bTitleLabel::ToolTip : public QToolTip
+{
+public:
+  ToolTip( K3bTitleLabel* label )
+    : QToolTip( label ),
+      m_label(label) {
+  }
+  
+  void maybeTip( const QPoint &pos ) {
+    QRect 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 & Qt::AlignHCenter )
+      startPos = r.left() + ( r.width() - 2*m_label->d->margin - neededWidth ) / 2;
+    else if( m_label->d->alignment & Qt::AlignRight )
+      startPos = r.right() - m_label->d->margin - neededWidth;
+    else
+      startPos = r.left() + m_label->d->margin;
+    
+    QRect titleTipRect( startPos, 0, m_label->d->displayTitleLength, m_label->height() );
+    QRect 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( QWidget* parent, const char* name )
+  : QFrame( parent, name )
+{
+  d = new Private();
+  m_toolTip = new ToolTip( this );
+}
+
+
+K3bTitleLabel::~K3bTitleLabel()
+{
+  delete m_toolTip;
+  delete d;
+}
+
+
+void K3bTitleLabel::setTitle( const QString& title, const QString& subTitle )
+{
+  d->title = title;
+  d->subTitle = subTitle;
+  updatePositioning();
+  update();
+}
+
+
+void K3bTitleLabel::setSubTitle( const QString& subTitle )
+{
+  d->subTitle = subTitle;
+  updatePositioning();
+  update();
+}
+
+
+void K3bTitleLabel::setAlignment( int align )
+{
+  d->alignment = align;
+  update();
+}
+
+
+QSize K3bTitleLabel::sizeHint() const
+{
+  return QSize( d->titleLength + d->subTitleLength + 2*d->margin, d->titleBaseLine );
+}
+
+QSize K3bTitleLabel::minimumSizeHint() const
+{
+  return QSize( d->cachedMinimumWidth, d->titleBaseLine );
+}
+
+void K3bTitleLabel::resizeEvent( QResizeEvent* e )
+{
+  QFrame::resizeEvent( e );
+  updatePositioning();
+  update();
+}
+
+void K3bTitleLabel::drawContents( QPainter* p )
+{
+  p->save();
+
+  QRect r = contentsRect();
+  p->eraseRect( r );
+
+  QFont 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 & Qt::AlignHCenter )
+    startPos = r.left() + ( r.width() - 2*d->margin - neededWidth ) / 2;
+  else if( d->alignment & Qt::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()
+{
+  QFont f(font());
+  f.setBold(true);
+  f.setPointSize( f.pointSize() + 2 );
+  QFontMetrics titleFm(f);
+
+  f.setBold(false);
+  f.setPointSize( f.pointSize() - 4 );
+  QFontMetrics 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;
+  
+  QString cutTitle = d->title;
+  if( cutTitle.length() > 2 ) {
+    cutTitle.truncate( 2 );
+    cutTitle += "...";
+  }
+  QString 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"