summaryrefslogtreecommitdiffstats
path: root/ksysguard/gui/SensorDisplayLib/BarGraph.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'ksysguard/gui/SensorDisplayLib/BarGraph.cpp')
-rw-r--r--ksysguard/gui/SensorDisplayLib/BarGraph.cpp177
1 files changed, 177 insertions, 0 deletions
diff --git a/ksysguard/gui/SensorDisplayLib/BarGraph.cpp b/ksysguard/gui/SensorDisplayLib/BarGraph.cpp
new file mode 100644
index 000000000..8d2b5e302
--- /dev/null
+++ b/ksysguard/gui/SensorDisplayLib/BarGraph.cpp
@@ -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 <tqpainter.h>
+
+#include <kdebug.h>
+#include <kiconloader.h>
+
+#include <ksgrd/StyleEngine.h>
+
+#include "BarGraph.h"
+
+BarGraph::BarGraph( TQWidget *parent, const char *name )
+ : TQWidget( 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( TQSizePolicy( TQSizePolicy::Expanding,
+ TQSizePolicy::Expanding, false ) );
+}
+
+BarGraph::~BarGraph()
+{
+}
+
+bool BarGraph::addBar( const TQString &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 TQMemArray<double> &newSamples )
+{
+ samples = newSamples;
+ update();
+}
+
+void BarGraph::changeRange( double min, double max )
+{
+ minValue = min;
+ maxValue = max;
+}
+
+void BarGraph::paintEvent( TQPaintEvent* )
+{
+ int w = width();
+ int h = height();
+
+ TQPixmap pm( w, h );
+ TQPainter p;
+ p.begin( &pm, this );
+ p.setFont( TQFont( p.font().family(), fontSize ) );
+ TQFontMetrics 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( TQColor( 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,
+ TQString( "%1" ).arg( samples[ b ] ) );
+ }
+ }
+ }
+
+ p.end();
+ bitBlt( this, 0, 0, &pm );
+}
+
+#include "BarGraph.moc"