Fix drawing of account balance graph when balance < 0.0

4 files changed, 25 insertions, 8 deletions

diff --git a/noncore/apps/checkbook/graph.cpp b/noncore/apps/checkbook/graph.cpp
index 389972e..72da738 100644
--- a/noncore/apps/checkbook/graph.cpp
+++ b/noncore/apps/checkbook/graph.cpp
@@ -21,150 +21,153 @@
  -.   .:....=;==+<;          General Public License along with this file;
   -_. . .   )=.  =           see the file COPYING. If not, write to the
     --        :-=`           Free Software Foundation, Inc.,
                              59 Temple Place - Suite 330,
                              Boston, MA 02111-1307, USA.
 
 */
 
 #include "graph.h"
 #include "graphinfo.h"
 
 #include <qpainter.h>
 
 #include <math.h>
 
 Graph::Graph( QWidget *parent, GraphInfo *d, const QString &name, int flags )
 	: QWidget( parent, name, flags )
 {
 	data = d;
 
 	graph.setOptimization( QPixmap::BestOptim );
 }
 
 void Graph::setGraphInfo( GraphInfo *d )
 {
 	data = d;
 }
 
 void Graph::drawGraph( bool regen )
 {
 	if ( regen )
 	{
 		initGraph();
 	}
 	QPainter p( this );
 	p.drawPixmap( 0, 0, graph );
 }
 
 void Graph::paintEvent( QPaintEvent * )
 {
 	drawGraph( FALSE );
 }
 
 void Graph::resizeEvent( QResizeEvent * )
 {
 	drawGraph( TRUE );
 }
 
 void Graph::initGraph()
 {
 	graph.resize( width(), height() );
 	graph.fill( QColor( 255, 255, 255 ) );
 
 	if ( !data )
 	{
 		return;
 	}
 
 	// Any common stuff here (titles, ???)
 
 	switch ( data->graphType() )
 	{
 		case GraphInfo::BarChart :
 		{
-			drawBarChart( width(), height(), data->maxValue() );
+			drawBarChart( width(), height(), data->maxValue(), data->minValue() );
 		}
 		break;
 		case GraphInfo::PieChart :
 		{
 			drawPieChart( width(), height(), data->totalValue() );
 		}
 	};
 }
 
-void Graph::drawBarChart( int width, int height, float max )
+void Graph::drawBarChart( int width, int height, float max, float min )
 {
 	QPainter p( &graph );
 
 	// Try to set the font size smaller for text
 	QFont f = font();
 	f.setPointSize( 8 );
 	p.setFont( f );
 
 	int x = 0;
 	int i = 0;
 	int n = data->numberDataPoints();
 	QFontMetrics fm=fontMetrics();
 	int fh = fm.height();
 	int fw;
 
 	QColor c( 0, 0, 255);
 	p.setBrush( c );
 
+    if ( min > 0 )
+        min = 0.0;
+
+	int bw = ( width - width / 4 ) / n;
+    int hoffset =  int( ( height - height / 4 - 1 ) * ( min * -1 ) / ( max - min ) );
 	for (DataPointInfo *dp = data->firstDataPoint(); dp; dp = data->nextDataPoint() )
 	{
-		int bw = ( width - width / 4 - x ) / ( n - i );
-		int bh = int( ( height - height / 4 - 1 ) * dp->value() / max );
-		p.drawRect( width / 8 + x, height - height / 8 - 1 - bh, bw, bh );
+        int bh = int( ( height - height / 4 - 1 ) * dp->value() / ( max - min ) );
+		p.drawRect( width / 8 + x, height - height / 8 - 1 - hoffset - bh, bw, bh );
 		fw = fm.width( dp->label() );
-		p.drawText( width / 8 + x - fw / 2 + bw / 2, height - height / 8, fw,
+		p.drawText( width / 8 + x - fw / 2 + bw / 2, height - height / 8 - hoffset, fw,
 					fh + height / 8, AlignTop | AlignHCenter, dp->label() );
-//					WordBreak | AlignTop | AlignHCenter, dp->label() );
 		i++;
 		x += bw;
 	}
 }
 
 void Graph::drawPieChart( int width, int height, float sum )
 {
 	QPainter p( &graph );
 
 	// Try to set the font size smaller for text
 	QFont f = font();
 	f.setPointSize( 8 );
 	p.setFont( f );
 
 	int n = data->numberDataPoints();
 
 	int apos = -90 * 16;
 
 	int xd = width - width / 5;
 	int yd = height - height / 5;
 
 	int i = 0;
 
 	QColor c;
 
 	for (DataPointInfo *dp = data->firstDataPoint(); dp; dp = data->nextDataPoint() )
 	{
 		c.setHsv( ( i *255) / n, 255, 255 );
 		p.setBrush( c );
 
 		int a = int( ( dp->value() * 360.0 ) / sum * 16.0 + 0.5 );
 		p.drawPie( width/10, height/10, xd, yd, -apos, -a );
 		apos += a;
 		i++;
 	}
 
 	double apos2 = -90 * 3.14159 / 180;
 	for (DataPointInfo *dp = data->firstDataPoint(); dp; dp = data->nextDataPoint() )
 	{
 		double a = dp->value() *360 / sum * 3.14159 / 180;
 		int x = int( cos( apos2 + a/2 ) * width * 5/16 + width/2 + 0.5 );
 		int y = int( sin( apos2 + a/2 ) * height * 5/16 + height/2 + 0.5 );
 		p.drawText( x - width/8, y - height/8, width/4, height/4, WordBreak | AlignCenter,
 					dp->label() );
 		apos2 += a;
 	}
 }
 
diff --git a/noncore/apps/checkbook/graph.h b/noncore/apps/checkbook/graph.h
index 340e910..616cbb6 100644
--- a/noncore/apps/checkbook/graph.h
+++ b/noncore/apps/checkbook/graph.h
@@ -1,63 +1,63 @@
 /*
                              This file is part of the OPIE Project
                =.
              .=l.            Copyright (c)  2002 Dan Williams <drw@handhelds.org>
            .>+-=
  _;:,     .>    :=|.         This file is free software; you can
 .> <`_,   >  .   <=          redistribute it and/or modify it under
 :`=1 )Y*s>-.--   :           the terms of the GNU General Public
 .="- .-=="i,     .._         License as published by the Free Software
  - .   .-<_>     .<>         Foundation; either version 2 of the License,
      ._= =}       :          or (at your option) any later version.
     .%`+i>       _;_.
     .i_,=:_.      -<s.       This file 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 file;
   -_. . .   )=.  =           see the file COPYING. If not, write to the
     --        :-=`           Free Software Foundation, Inc.,
                              59 Temple Place - Suite 330,
                              Boston, MA 02111-1307, USA.
 
 */
 
 #ifndef GRAPH_H
 #define GRAPH_H
 
 #include <qpixmap.h>
 #include <qwidget.h>
 
 class GraphInfo;
 class QPainter;
 
 class Graph : public QWidget
 {
 	Q_OBJECT
 
 	public:
 		Graph( QWidget * = 0x0, GraphInfo * = 0x0, const QString & = 0x0, int = 0 );
 
 		void setGraphInfo( GraphInfo * );
 
 		void drawGraph( bool = FALSE );
 
 	protected:
 		void paintEvent( QPaintEvent * );
 		void resizeEvent( QResizeEvent * );
 
 	private:
 		GraphInfo *data;
 
 		QPixmap graph;
 
 		void initGraph();
-		void drawBarChart( int, int, float );
+		void drawBarChart( int, int, float, float );
 		void drawPieChart( int, int, float );
 };
 
 #endif
diff --git a/noncore/apps/checkbook/graphinfo.cpp b/noncore/apps/checkbook/graphinfo.cpp
index fec6896..5b72c80 100644
--- a/noncore/apps/checkbook/graphinfo.cpp
+++ b/noncore/apps/checkbook/graphinfo.cpp
@@ -36,88 +36,101 @@ GraphInfo::GraphInfo( GraphType type, DataPointList *data, const QString &title,
 	gt = title;
 	xt = xtitle;
 	yt = ytitle;
 }
 
 GraphInfo::~GraphInfo()
 {
 	if ( d )
 	{
 		for ( DataPointInfo *data = d->first(); data; data = d->next() )
 		{
 			delete data;
 		}
 	}
 }
 
 GraphInfo::GraphType GraphInfo::graphType()
 {
 	return t;
 }
 
 void GraphInfo::setGraphType( GraphType type )
 {
 	t = type;
 }
 
 DataPointList *GraphInfo::dataPoints()
 {
 	return d;
 }
 
 void GraphInfo::setDataPoints( DataPointList *data )
 {
 	d = data;
 }
 
 DataPointInfo *GraphInfo::firstDataPoint()
 {
 	return( d->first() );
 }
 
 DataPointInfo *GraphInfo::nextDataPoint()
 {
 	return( d->next() );
 }
 
 int GraphInfo::numberDataPoints()
 {
 	return( d->count() );
 }
 
 float GraphInfo::maxValue()
 {
 	float max = 0.0;
 	for ( DataPointInfo *data = d->first(); data; data = d->next() )
 	{
 		if ( data->value() > max )
 		{
 			max = data->value();
 		}
 	}
 	return max;
 }
 
+float GraphInfo::minValue()
+{
+	float min = 0.0;
+	for ( DataPointInfo *data = d->first(); data; data = d->next() )
+	{
+		if ( data->value() < min )
+		{
+			min = data->value();
+		}
+	}
+	return min;
+}
+
 float GraphInfo::totalValue()
 {
 	float sum = 0.0;
 	for ( DataPointInfo *data = d->first(); data; data = d->next() )
 	{
 		sum += data->value();
 	}
 	return sum;
 }
 
 void GraphInfo::setGraphTitle( const QString &title )
 {
 	gt = title;
 }
 
 void GraphInfo::setXAxisTitle( const QString &xtitle )
 {
 	xt = xtitle;
 }
 
 void GraphInfo::setYAxisTitle( const QString &ytitle )
 {
 	yt = ytitle;
 }
diff --git a/noncore/apps/checkbook/graphinfo.h b/noncore/apps/checkbook/graphinfo.h
index 41927b4..f7842c6 100644
--- a/noncore/apps/checkbook/graphinfo.h
+++ b/noncore/apps/checkbook/graphinfo.h
@@ -10,79 +10,80 @@
  - .   .-<_>     .<>         Foundation; either version 2 of the License,
      ._= =}       :          or (at your option) any later version.
     .%`+i>       _;_.
     .i_,=:_.      -<s.       This file 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 file;
   -_. . .   )=.  =           see the file COPYING. If not, write to the
     --        :-=`           Free Software Foundation, Inc.,
                              59 Temple Place - Suite 330,
                              Boston, MA 02111-1307, USA.
 
 */
 
 #ifndef GRAPHINFO_H
 #define GRAPHINFO_H
 
 #include <qlist.h>
 #include <qstringlist.h>
 
 class DataPointInfo
 {
 	public:
 		DataPointInfo()
 			: l( 0x0 ), v( 0.0 ) {}
 		DataPointInfo( const QString &label, float value )
 			: l( label ), v( value ) {}
 
 		const QString &label() { return l; }
 		float          value() { return v; }
 		
 		void addToValue( float value ) { v += value; }
 
 	private:
 		QString l;
 		float   v;
 };
 
 typedef QList<DataPointInfo> DataPointList;
 
 class GraphInfo
 {
 	public:
 		enum GraphType { BarChart, PieChart };
 
 		GraphInfo( GraphType = BarChart, DataPointList * = 0x0,
 				   const QString & = 0x0, const QString & = 0x0, const QString & = 0x0 );
 		~GraphInfo();
 
 		GraphInfo::GraphType graphType();
 		void                 setGraphType( GraphType );
 
 		DataPointList *dataPoints();
 		void           setDataPoints( DataPointList * );
 		DataPointInfo *firstDataPoint();
 		DataPointInfo *nextDataPoint();
 		int            numberDataPoints();
 
 		float maxValue();
+		float minValue();
 		float totalValue();
 
 		void setGraphTitle( const QString & );
 		void setXAxisTitle( const QString & );
 		void setYAxisTitle( const QString & );
 
 	private:
 		GraphType      t;
 		DataPointList *d;
 		QString        gt;
 		QString        xt;
 		QString        yt;
 };
 
 #endif