Multiple Bar plot legend - core-plot

Question

I have a chart with 2 bar plots (Example: A and B).
For each hour i have 2 bar plots.
When i set the legend, i get swatch and text for every hour and bar
plot.
Example: In my chart have 4 hours then my legend will be like this
A A A A
B B B B
And i only want
A B
Because on every hour, the bars means the same.
How can i do this ??
I have tried everything to make this happen but no success till now....
Bellow is my
// CPTLegend *theLegend = [CPTLegend legendWithGraph:barChart];
CPTLegend *theLegend = [CPTLegend legendWithPlots:[NSArray arrayWithObjects:[barChart plotAtIndex:0],[barChart plotAtIndex:1], nil]];
theLegend.numberOfRows = 1;
theLegend.numberOfColumns = 2;//[horas count] +1 / 2;
//theLegend.fill = [CPTFill fillWithColor:[CPTColor colorWithGenericGray:0.15]];
//theLegend.borderLineStyle = barLineStyle;
theLegend.cornerRadius = 10.0;
theLegend.swatchSize = CGSizeMake(15, 15);
//whiteTextStyle.fontSize = 16.0;
//theLegend.textStyle = whiteTextStyle;
theLegend.rowMargin = 10.0;
theLegend.paddingLeft = 12.0;
theLegend.paddingTop = 12.0;
theLegend.paddingRight = 12.0;
theLegend.paddingBottom = 12.0;
//theLegend.equalColumns = YES;
//theLegend.equalRows = YES;
theLegend.delegate = self;
barChart.legend = theLegend;
-(NSString *)legendTitleForBarPlot:(CPTBarPlot *)barPlot recordIndex:(NSUInteger)index{
if ( [barPlot.identifier isEqual:#"Embarque"] ) {
if (index == 0)
{
return #"Embarque";
}else {
return #"";
}
}else {
if (index == 0)
{
return #"Desembarque";
}else {
return #"";
}
}
}
-(BOOL)legend:(CPTLegend *)legend shouldDrawSwatchAtIndex:(NSUInteger)index forPlot:(CPTPlot *)plot inRect:(CGRect)rect inContext:(CGContextRef)context{
if (index == 0) {
return YES;
}else{
return NO;
}
}

Answer 1

Don't implement the -legendTitleForBarPlot:recordIndex: method unless you want a separate label for each bar. Use the title property to set a single legend title for the plot.
The -legend:shouldDrawSwatchAtIndex:forPlot:inRect:inContext: method is only needed if you want to change the default swatch drawing in some way.

Answer 2

-(void) exibirGraficoEmbarqueDescarga {
// Create barChart from theme
barChart = [[CPTXYGraph alloc] initWithFrame:CGRectZero];
CPTTheme *theme = [CPTTheme themeNamed:kCPTPlainWhiteTheme];
[barChart applyTheme:theme];
//CPTGraphHostingView *hostingView = (CPTGraphHostingView *)self.view;
//hostingView.hostedGraph = barChart;
barChart.delegate = self;
if (chartView == nil)
{
chartView = [[CPTGraphHostingView alloc] initWithFrame:CGRectMake(-15, 30, 350, 320)];
// chartView = [[CPTGraphHostingView alloc] initWithFrame:CGRectMake(0, 35, 510, 280)];
[self.view addSubview:chartView];
}
chartView.hostedGraph = barChart;
// Border
barChart.plotAreaFrame.borderLineStyle = nil;
barChart.plotAreaFrame.cornerRadius = 0.0f;
// Paddings
barChart.paddingLeft = 0.0f;
barChart.paddingRight = 0.0f;
barChart.paddingTop = 0.0f;
barChart.paddingBottom = 0.0f;
barChart.plotAreaFrame.paddingLeft = 70.0;
barChart.plotAreaFrame.paddingTop = 20.0;
barChart.plotAreaFrame.paddingRight = 20.0;
barChart.plotAreaFrame.paddingBottom = 80.0;
// Graph title
barChart.title = #"Embarque / Descarga";
CPTMutableTextStyle *textStyle = [CPTTextStyle textStyle];
textStyle.color = [CPTColor grayColor];
textStyle.fontSize = 16.0f;
textStyle.textAlignment = CPTTextAlignmentCenter;
barChart.titleTextStyle = textStyle;
barChart.titleDisplacement = CGPointMake(1.0f, -20.0f);
barChart.titlePlotAreaFrameAnchor = CPTRectAnchorTop;
// Add plot space for horizontal bar charts
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)barChart.defaultPlotSpace;
Apoio *apoio = [[Apoio alloc] init];
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(0.0f) length:CPTDecimalFromFloat([apoio retornaMaiorDadosGrafico:qtdEmb :qtdDesc])];
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(0.0f) length:CPTDecimalFromFloat(16.0f)];
CPTXYAxisSet *axisSet = (CPTXYAxisSet *)barChart.axisSet;
CPTXYAxis *x = axisSet.xAxis;
CPTMutableLineStyle *marcacaoLineStyle = [CPTLineStyle lineStyle];
marcacaoLineStyle.lineColor = [CPTColor lightGrayColor];
marcacaoLineStyle.lineWidth = 1;
x.axisLineStyle = marcacaoLineStyle;
x.majorTickLineStyle = marcacaoLineStyle;
x.minorTickLineStyle = marcacaoLineStyle;
x.majorIntervalLength = CPTDecimalFromString(#"5");
x.orthogonalCoordinateDecimal = CPTDecimalFromString(#"0");
//x.title = #"Horas";
//x.titleLocation = CPTDecimalFromFloat(15.0f);
//x.titleOffset = 55.0f;
// Define some custom labels for the data elements
x.labelingPolicy = CPTAxisLabelingPolicyNone;
NSArray *customTickLocations = posicao;//[NSArray arrayWithObjects:[NSDecimalNumber numberWithFloat:0.7], [NSDecimalNumber numberWithFloat:2.7], [NSDecimalNumber numberWithFloat:4.7], nil];
NSArray *xAxisLabels = horas;//[NSArray arrayWithObjects:#"10", #"11", #"12", nil];
NSUInteger labelLocation = 0;
NSMutableArray *customLabels = [NSMutableArray arrayWithCapacity:[xAxisLabels count]];
for ( NSNumber *tickLocation in customTickLocations ) {
CPTAxisLabel *newLabel = [[CPTAxisLabel alloc] initWithText:[xAxisLabels objectAtIndex:labelLocation++] textStyle:x.labelTextStyle];
newLabel.tickLocation = [tickLocation decimalValue];
newLabel.offset = x.labelOffset; //+ x.majorTickLength;
[customLabels addObject:newLabel];
}
x.axisLabels = [NSSet setWithArray:customLabels];
CPTXYAxis *y = axisSet.yAxis;
y.axisLineStyle = marcacaoLineStyle;
y.majorTickLineStyle = marcacaoLineStyle;
y.minorTickLineStyle = marcacaoLineStyle;
y.majorIntervalLength = CPTDecimalFromInt([apoio retornaMaiorDadosGrafico:qtdEmb :qtdDesc]/7); //CPTDecimalFromString(#"5");
y.orthogonalCoordinateDecimal = CPTDecimalFromString(#"0");
y.title = #"Containers";
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setMaximumFractionDigits:0];
y.labelFormatter = formatter;
CPTMutableLineStyle *majorGridLineStyle = [CPTMutableLineStyle lineStyle];
majorGridLineStyle.lineWidth = 0.75;
majorGridLineStyle.lineColor = [CPTColor lightGrayColor ];
y.majorGridLineStyle = majorGridLineStyle ;
y.preferredNumberOfMajorTicks = 10;
CPTMutableTextStyle *EixostextStyle = [CPTTextStyle textStyle];
EixostextStyle.fontSize = 12.0f;
y.labelTextStyle = EixostextStyle;
x.labelTextStyle = EixostextStyle;
// Embaque
CPTBarPlot *barPlot = [CPTBarPlot tubularBarPlotWithColor:[CPTColor darkGrayColor] horizontalBars:NO];
barPlot.baseValue = CPTDecimalFromString(#"0");
barPlot.dataSource = self;
barPlot.delegate = self;
barPlot.barOffset = CPTDecimalFromFloat(0.25f);
barPlot.identifier = #"Embarque";
barPlot.title = #"Embarque";
barPlot.labelOffset = 0;
[barChart addPlot:barPlot toPlotSpace:plotSpace];
//Descarga
CPTBarPlot *barPlot2 = [CPTBarPlot tubularBarPlotWithColor:[CPTColor blueColor] horizontalBars:NO];
barPlot2.baseValue = CPTDecimalFromString(#"0");
barPlot2.dataSource = self;
barPlot2.delegate = self;
//barPlot2.barOffset = CPTDecimalFromFloat(25f);
barPlot2.identifier = #"Descarga";
barPlot2.title = #"Descarga";
barPlot2.labelOffset = 0;
[barChart addPlot:barPlot2 toPlotSpace:plotSpace];
CPTLegend *theLegend = [CPTLegend legendWithGraph:barChart];
theLegend.numberOfRows = 1;
theLegend.numberOfColumns = 2;
theLegend.cornerRadius = 10.0;
theLegend.swatchSize = CGSizeMake(15, 15);
//whiteTextStyle.fontSize = 16.0;
//theLegend.textStyle = whiteTextStyle;
theLegend.rowMargin = 10.0;
theLegend.paddingLeft = 12.0;
theLegend.paddingTop = 12.0;
theLegend.paddingRight = 12.0;
theLegend.paddingBottom = 12.0;
//theLegend.equalColumns = YES;
//theLegend.equalRows = YES;
barChart.legend = theLegend;
}
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot{
return [horas count];}
-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
{
NSDecimalNumber *num = nil;
if ( [plot isKindOfClass:[CPTBarPlot class]] ) {
switch ( fieldEnum ) {
case CPTBarPlotFieldBarLocation:
if ( [plot.identifier isEqual:#"Embarque"] ) {
num = (NSDecimalNumber *)[NSDecimalNumber numberWithUnsignedInteger:index*2];
} else{
num = (NSDecimalNumber *)[NSDecimalNumber numberWithUnsignedInteger:(index*2+1)];
}
break;
case CPTBarPlotFieldBarTip:
if ( [plot.identifier isEqual:#"Embarque"] ) {
num = [qtdEmb objectAtIndex:index];
} else{
num = [qtdDesc objectAtIndex:index];
}
break;
}
}
return num;
}
-(CPTFill *)barFillForBarPlot:(CPTBarPlot *)barPlot recordIndex:(NSUInteger)index
{
if ( [barPlot.identifier isEqual:#"Embarque"] ) {
return [CPTFill fillWithColor:[CPTColor colorWithComponentRed:(175/255.0 ) green:(238/255.0) blue:(238/255.0) alpha:1.0]];
}
if ( [barPlot.identifier isEqual:#"Descarga"] ) {
return [CPTFill fillWithColor:[CPTColor colorWithComponentRed:(255./255.0 ) green:(228.0/255.0) blue:(181.0/255.0) alpha:1.0]];
}
}
-(CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)index
{
int valor;
if ( [plot.identifier isEqual:#"Embarque"] )
{
valor = [qtdEmb objectAtIndex:index];
}else{
valor = [qtdDesc objectAtIndex:index];
}
CPTTextLayer *newLayer = [[CPTTextLayer alloc] initWithText:[[NSString alloc] initWithFormat:#"%#",valor]];
CPTMutableTextStyle *estiloTexto = [[CPTMutableTextStyle alloc] init];
estiloTexto.color = [CPTColor blackColor];
estiloTexto.fontSize = 10;
newLayer.textStyle = estiloTexto;
return newLayer;
}