Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdebase@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 177 insertions, 0 deletions

diff --git a/ksysguard/gui/SensorDisplayLib/BarGraph.cc b/ksysguard/gui/SensorDisplayLib/BarGraph.cc
new file mode 100644
index 000000000..f6dc741cb
--- /dev/null
+++ b/ksysguard/gui/SensorDisplayLib/BarGraph.cc
@@ -0,0 +1,177 @@
+/*
+    KSysGuard, the KDE System Guard
+
+    Copyright (c) 1999, 2000 Chris Schlaeger <cs@kde.org>
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of version 2 of the GNU General Public
+    License as published by the Free Software Foundation
+
+    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.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+    KSysGuard is currently maintained by Chris Schlaeger <cs@kde.org>.
+    Please do not commit any changes without consulting me first. Thanks!
+
+*/
+
+#include <assert.h>
+#include <string.h>
+
+#include <qpainter.h>
+
+#include <kdebug.h>
+#include <kiconloader.h>
+
+#include <ksgrd/StyleEngine.h>
+
+#include "BarGraph.h"
+
+BarGraph::BarGraph( QWidget *parent, const char *name )
+  : QWidget( parent, name )
+{
+  // paintEvent covers whole widget so we use no background to avoid flicker
+  setBackgroundMode( NoBackground );
+
+  bars = 0;
+  minValue = 0.0;
+  maxValue = 100.0;
+  lowerLimit = upperLimit = 0.0;
+  lowerLimitActive = upperLimitActive = false;
+
+  normalColor = KSGRD::Style->firstForegroundColor();
+  alarmColor = KSGRD::Style->alarmColor();
+  backgroundColor = KSGRD::Style->backgroundColor();
+  fontSize = KSGRD::Style->fontSize();
+
+  // Anything smaller than this does not make sense.
+  setMinimumSize( 16, 16 );
+  setSizePolicy( QSizePolicy( QSizePolicy::Expanding,
+                 QSizePolicy::Expanding, false ) );
+}
+
+BarGraph::~BarGraph()
+{
+}
+
+bool BarGraph::addBar( const QString &footer )
+{
+  samples.resize( bars + 1 );
+  samples[ bars++ ] = 0.0;
+  footers.append( footer );
+
+  return true;
+}
+
+bool BarGraph::removeBar( uint idx )
+{
+  if ( idx >= bars ) {
+    kdDebug(1215) << "BarGraph::removeBar: idx " << idx << " out of range "
+                  << bars << endl;
+    return false;
+  }
+
+  samples.resize( --bars );
+  footers.remove( footers.at( idx ) );
+  update();
+
+  return true;
+}
+
+void BarGraph::updateSamples( const QMemArray<double> &newSamples )
+{
+  samples = newSamples;
+  update();
+}
+
+void BarGraph::changeRange( double min, double max )
+{
+  minValue = min;
+  maxValue = max;
+}
+
+void BarGraph::paintEvent( QPaintEvent* )
+{
+  int w = width();
+  int h = height();
+
+  QPixmap pm( w, h );
+  QPainter p;
+  p.begin( &pm, this );
+  p.setFont( QFont( p.font().family(), fontSize ) );
+  QFontMetrics fm( p.font() );
+
+  pm.fill( backgroundColor );
+
+  /* Draw white line along the bottom and the right side of the
+   * widget to create a 3D like look. */
+  p.setPen( QColor( colorGroup().light() ) );
+  p.drawLine( 0, h - 1, w - 1, h - 1 );
+  p.drawLine( w - 1, 0, w - 1, h - 1 );
+
+  p.setClipRect( 1, 1, w - 2, h - 2 );
+
+  if ( bars > 0 ) {
+    int barWidth = ( w - 2 ) / bars;
+    uint b;
+    /* Labels are only printed underneath the bars if the labels
+     * for all bars are smaller than the bar width. If a single
+     * label does not fit no label is shown. */
+    bool showLabels = true;
+    for ( b = 0; b < bars; b++ )
+      if ( fm.width( footers[ b ] ) > barWidth )
+        showLabels = false;
+
+    int barHeight;
+    if ( showLabels )
+      barHeight = h - 2 - ( 2 * fm.lineSpacing() ) - 2;
+    else
+      barHeight = h - 2;
+
+    for ( uint b = 0; b < bars; b++ ) {
+      int topVal = (int) ( (float)barHeight / maxValue *
+                           ( samples[ b ] - minValue ) );
+      /* TODO: This widget does not handle negative values properly. */
+      if ( topVal < 0 )
+        topVal = 0;
+
+      for ( int i = 0; i < barHeight && i < topVal; i += 2 ) {
+        if ( ( upperLimitActive && samples[ b ] > upperLimit ) ||
+             ( lowerLimitActive && samples[ b ] < lowerLimit ) )
+          p.setPen( alarmColor.light( static_cast<int>( 30 + ( 70.0 /
+                                      ( barHeight + 1 ) * i ) ) ) );
+        else
+          p.setPen( normalColor.light( static_cast<int>( 30 + ( 70.0 /
+                                      ( barHeight + 1 ) * i ) ) ) );
+        p.drawLine( b * barWidth + 3, barHeight - i, ( b + 1 ) * barWidth - 3,
+                    barHeight - i );
+      }
+
+      if ( ( upperLimitActive && samples[ b ] > upperLimit ) ||
+           ( lowerLimitActive && samples[ b ] < lowerLimit ) )
+        p.setPen( alarmColor );
+      else
+        p.setPen( normalColor );
+
+      if ( showLabels ) {
+        p.drawText( b * barWidth + 3, h - ( 2 * fm.lineSpacing() ) - 2,
+                    barWidth - 2 * 3, fm.lineSpacing(), Qt::AlignCenter,
+                    footers[ b ] );
+        p.drawText( b * barWidth + 3, h - fm.lineSpacing() - 2,
+                    barWidth - 2 * 3, fm.lineSpacing(), Qt::AlignCenter,
+                    QString( "%1" ).arg( samples[ b ] ) );
+      }
+    }
+  }
+
+  p.end();
+  bitBlt( this, 0, 0, &pm );
+}
+
+#include "BarGraph.moc"