Operating system requirements: iOS 5.0 or later.
Mobile device: iPad.
This example displays application of new settings for data series, chart area, chart plot area and legend with the use of dictionaries:
Center of radial gradient displayed as bubble fill on a bubble chart is offset to the left bottom bubble angle.
A new fill color is set for chart area and chart plot area.
A new fill color, font and label text is set for chat legend.
Executing the example requires to place the following code instead of the executeExample method of the ViewController class (see the Creating a Bubble Chart section):
-(void)executeExample {
// Apply new settings to bubble chart series
[self applySettingsForBubbleSeries];
// Apply new settings to chart area
[self applySettingsForChartArea];
// Apply new settings to chart plot area
[self applySettingsForChartPlotArea];
// Apply new settings to chart legend
[self applySettingsForChartLegend];
}
-(void)applySettingsForBubbleSeries {
for (BubbleSeries *serie in [chart seriesList]) {
// Get dictionary for chart bubble fill brush settings
//NSMutableDictionary *dump = [serie.marker.background dumpConfigurationToDict];
NSMutableDictionary *fullDump = [(RadialGradientBrush *)serie.marker.background dumpConfiguration];
NSMutableDictionary *dump = [NSMutableDictionary dictionaryWithObject: fullDump
forKey: @"RadialGradientBrush"];
// Offset center of radial gradient
[self moveGradientCenterToPoint: (CGPoint) CGPointMake(0.25, 0.75)
forRadialGradient: dump];
// Restore gradient settings from dump
RadialGradientBrush *brush = [RadialGradientBrush radialGradientBrushWithDict: dump];
// Set marker fill brush
[serie.marker setBackground: brush];
}
}
-(void)applySettingsForChartArea {
ChartArea *area = [chart chartArea];
// Create a dictionary for chart area settings
NSMutableDictionary *areaDump = [area dumpConfigurationToDict];
// Set a new fill color for chart area
[self applyBackgroundColor: [UIColor colorWithHex:@"fcf2ea"]
andOpacity: 1
forChartObject: areaDump];
[area configureAreaWithDict: areaDump];
}
-(void)applySettingsForChartPlotArea {
ChartPlotArea *plotArea = [chart plotArea];
[plotArea setBorderColor: [UIColor yellowColor]];
// Create a dictionary for chart plot area settings
NSMutableDictionary *plotAreaDump = [plotArea dumpConfigurationToDict];
// Set new fill color for chart plot area
[self applyBackgroundColor: [UIColor colorWithHex:@"fcf2ea"]
andOpacity: 0.7
forChartObject: plotAreaDump];
[plotArea configurePlotAreaWithDict: plotAreaDump andDefaults: nil];
}
-(void) applySettingsForChartLegend {
ChartLegend *legend = [chart legend];
[legend setBorderColor: [UIColor colorWithHex:@"CCCCCC"]];
// Create a dictionary for chart legend settings
NSMutableDictionary *legendDump = [legend dumpConfigurationToDict];
// Set new font settings
[legendDump addEntriesFromDictionary: [self getFontSettings]];
// Set new fill color for chart legend
[self applyBackgroundColor: [UIColor colorWithHex:@"fcf2ea"]
andOpacity: 0.7
forChartObject: legendDump];
// Set color for legend labels
[self applyTextColor: [UIColor colorWithHex:@"#003300"] forChartObject: legendDump];
[legend configureLegendWithDict: legendDump andDefaults: nil];
}
// Offsets center of radial gradient
-(void) moveGradientCenterToPoint: (CGPoint) point
forRadialGradient: (NSDictionary *) settings {
NSDictionary *sourcePoint = [[settings valueForKey:@"RadialGradientBrush"] valueForKey: @"center"];
[sourcePoint setValue: [NSNumber numberWithFloat: point.x] forKey:@"x"];
[sourcePoint setValue: [NSNumber numberWithFloat: point.y] forKey:@"y"];
}
// Sets text color for chart elements
-(void)applyTextColor: (UIColor *) color
forChartObject: (NSMutableDictionary *)dump {
[dump setValue:[NSMutableDictionary dictForColor: color withTitle: @"color"] forKey:@"color"];
}
// Sets fill color for chart elements
-(void) applyBackgroundColor: (UIColor *) color
andOpacity: (double) opacity
forChartObject: (NSMutableDictionary *) dump {
SolidColorBrush *background = (SolidColorBrush *)[SolidColorBrush brushWithDict:[dump dictForProp:@"background"]];
[background setColor: color];
[background setOpacity: opacity];
NSMutableDictionary *backgroundSettings = [[NSMutableDictionary new] autorelease];
[backgroundSettings setValue: [NSNumber numberWithInt: 0]
forKey:@"currentType"];
[backgroundSettings setValue: [self dumpConfigurationToDictForSolidColorBrush: background]
forKey:@"SolidColorBrush"];
[dump setValue: backgroundSettings
forKey:@"background"];
}
// Creates a dictionary for settings of solid color fill brush settings
- (NSMutableDictionary *)dumpConfigurationToDictForSolidColorBrush:(SolidColorBrush *)brush {
NSMutableDictionary *dict = [[NSMutableDictionary new] autorelease];
if (brush != nil) {
[dict setValue: [NSMutableDictionary dictForColor:[brush color] withTitle: @"color"]
forKey:@"color"];
[dict setValue: [NSMutableDictionary dictForDouble: [brush opacity] withMin:0 max:1 title:@"opacity"]
forKey:@"opacity"];
}
return dict;
}
// Creates a dictionary for specified font settings
-(NSMutableDictionary *) dumpConfigurationToDictForFont: (UIFont *) font {
NSMutableDictionary *fontSettings = [[NSMutableDictionary new] autorelease];
[fontSettings setValue: [font familyName] forKey:@"family"];
[fontSettings setValue: [NSNumber numberWithFloat: font.lineHeight] forKey:@"size"];
return fontSettings;
}
// Returns dictionary for default font settings
-(NSMutableDictionary *) getFontSettings {
UIFont *font = [UIFont fontWithName:@"Arial" size: 12];
return [NSMutableDictionary dictionaryWithObject: [self dumpConfigurationToDictForFont: font] forKey:@"font"];
}
After executing the example the radial gradient displayed as a bubble fill on the bubble chart is offset to the left bottom angle. A new fill color is set for chart area and chart plot area. A new fill color, font and label color are set for chart legend:
The example execution result does not change if the string
NSMutableDictionary *dump = [serie.marker.background dumpConfigurationToDict];
is replaced with the following script:
NSMutableDictionary *fullDump = [(RadialGradientBrush *)serie.marker.background dumpConfiguration]; NSMutableDictionary *dump = [NSMutableDictionary dictionaryWithObject: fullDump forKey: @"RadialGradientBrush"];
These scenario fragments create equal dictionaries for chart bubble fill brush settings.
See also: